pinctrl: samsung: Group all drivers in a sub-dir

Group all pin control drivers of Samsung platform together in
a sub-directory for easy maintenance.

Signed-off-by: Sachin Kamat <sachin.kamat@samsung.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

9 files changed, 5321 insertions, 0 deletions

diff --git a/drivers/pinctrl/samsung/Kconfig b/drivers/pinctrl/samsung/Kconfig
new file mode 100644
index 0000000..d0461cd
--- /dev/null
+++ b/drivers/pinctrl/samsung/Kconfig
@@ -0,0 +1,28 @@
+#
+# Samsung Pin control drivers
+#
+config PINCTRL_SAMSUNG
+	bool
+	select PINMUX
+	select PINCONF
+
+config PINCTRL_EXYNOS
+	bool "Pinctrl driver data for Samsung EXYNOS SoCs other than 5440"
+	depends on OF && GPIOLIB && (ARCH_EXYNOS || ARCH_S5PV210)
+	select PINCTRL_SAMSUNG
+
+config PINCTRL_EXYNOS5440
+	bool "Samsung EXYNOS5440 SoC pinctrl driver"
+	depends on SOC_EXYNOS5440
+	select PINMUX
+	select PINCONF
+
+config PINCTRL_S3C24XX
+	bool "Samsung S3C24XX SoC pinctrl driver"
+	depends on ARCH_S3C24XX
+	select PINCTRL_SAMSUNG
+
+config PINCTRL_S3C64XX
+	bool "Samsung S3C64XX SoC pinctrl driver"
+	depends on ARCH_S3C64XX
+	select PINCTRL_SAMSUNG
diff --git a/drivers/pinctrl/samsung/Makefile b/drivers/pinctrl/samsung/Makefile
new file mode 100644
index 0000000..70160c0
--- /dev/null
+++ b/drivers/pinctrl/samsung/Makefile
@@ -0,0 +1,7 @@
+# Samsung pin control drivers
+
+obj-$(CONFIG_PINCTRL_SAMSUNG)	+= pinctrl-samsung.o
+obj-$(CONFIG_PINCTRL_EXYNOS)	+= pinctrl-exynos.o
+obj-$(CONFIG_PINCTRL_EXYNOS5440)	+= pinctrl-exynos5440.o
+obj-$(CONFIG_PINCTRL_S3C24XX)	+= pinctrl-s3c24xx.o
+obj-$(CONFIG_PINCTRL_S3C64XX)	+= pinctrl-s3c64xx.o
diff --git a/drivers/pinctrl/samsung/pinctrl-exynos.c b/drivers/pinctrl/samsung/pinctrl-exynos.c
new file mode 100644
index 0000000..003bfd8
--- /dev/null
+++ b/drivers/pinctrl/samsung/pinctrl-exynos.c
@@ -0,0 +1,1123 @@
+/*
+ * Exynos specific support for Samsung pinctrl/gpiolib driver with eint support.
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com
+ * Copyright (c) 2012 Linaro Ltd
+ *		http://www.linaro.org
+ *
+ * Author: Thomas Abraham <thomas.ab@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This file contains the Samsung Exynos specific information required by the
+ * the Samsung pinctrl/gpiolib driver. It also includes the implementation of
+ * external gpio and wakeup interrupt support.
+ */
+
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/interrupt.h>
+#include <linux/irqdomain.h>
+#include <linux/irq.h>
+#include <linux/irqchip/chained_irq.h>
+#include <linux/of_irq.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/err.h>
+
+#include "pinctrl-samsung.h"
+#include "pinctrl-exynos.h"
+
+struct exynos_irq_chip {
+	struct irq_chip chip;
+
+	u32 eint_con;
+	u32 eint_mask;
+	u32 eint_pend;
+};
+
+static inline struct exynos_irq_chip *to_exynos_irq_chip(struct irq_chip *chip)
+{
+	return container_of(chip, struct exynos_irq_chip, chip);
+}
+
+static struct samsung_pin_bank_type bank_type_off = {
+	.fld_width = { 4, 1, 2, 2, 2, 2, },
+	.reg_offset = { 0x00, 0x04, 0x08, 0x0c, 0x10, 0x14, },
+};
+
+static struct samsung_pin_bank_type bank_type_alive = {
+	.fld_width = { 4, 1, 2, 2, },
+	.reg_offset = { 0x00, 0x04, 0x08, 0x0c, },
+};
+
+/* list of external wakeup controllers supported */
+static const struct of_device_id exynos_wkup_irq_ids[] = {
+	{ .compatible = "samsung,exynos4210-wakeup-eint", },
+	{ }
+};
+
+static void exynos_irq_mask(struct irq_data *irqd)
+{
+	struct irq_chip *chip = irq_data_get_irq_chip(irqd);
+	struct exynos_irq_chip *our_chip = to_exynos_irq_chip(chip);
+	struct samsung_pin_bank *bank = irq_data_get_irq_chip_data(irqd);
+	struct samsung_pinctrl_drv_data *d = bank->drvdata;
+	unsigned long reg_mask = our_chip->eint_mask + bank->eint_offset;
+	unsigned long mask;
+	unsigned long flags;
+
+	spin_lock_irqsave(&bank->slock, flags);
+
+	mask = readl(d->virt_base + reg_mask);
+	mask |= 1 << irqd->hwirq;
+	writel(mask, d->virt_base + reg_mask);
+
+	spin_unlock_irqrestore(&bank->slock, flags);
+}
+
+static void exynos_irq_ack(struct irq_data *irqd)
+{
+	struct irq_chip *chip = irq_data_get_irq_chip(irqd);
+	struct exynos_irq_chip *our_chip = to_exynos_irq_chip(chip);
+	struct samsung_pin_bank *bank = irq_data_get_irq_chip_data(irqd);
+	struct samsung_pinctrl_drv_data *d = bank->drvdata;
+	unsigned long reg_pend = our_chip->eint_pend + bank->eint_offset;
+
+	writel(1 << irqd->hwirq, d->virt_base + reg_pend);
+}
+
+static void exynos_irq_unmask(struct irq_data *irqd)
+{
+	struct irq_chip *chip = irq_data_get_irq_chip(irqd);
+	struct exynos_irq_chip *our_chip = to_exynos_irq_chip(chip);
+	struct samsung_pin_bank *bank = irq_data_get_irq_chip_data(irqd);
+	struct samsung_pinctrl_drv_data *d = bank->drvdata;
+	unsigned long reg_mask = our_chip->eint_mask + bank->eint_offset;
+	unsigned long mask;
+	unsigned long flags;
+
+	/*
+	 * Ack level interrupts right before unmask
+	 *
+	 * If we don't do this we'll get a double-interrupt.  Level triggered
+	 * interrupts must not fire an interrupt if the level is not
+	 * _currently_ active, even if it was active while the interrupt was
+	 * masked.
+	 */
+	if (irqd_get_trigger_type(irqd) & IRQ_TYPE_LEVEL_MASK)
+		exynos_irq_ack(irqd);
+
+	spin_lock_irqsave(&bank->slock, flags);
+
+	mask = readl(d->virt_base + reg_mask);
+	mask &= ~(1 << irqd->hwirq);
+	writel(mask, d->virt_base + reg_mask);
+
+	spin_unlock_irqrestore(&bank->slock, flags);
+}
+
+static int exynos_irq_set_type(struct irq_data *irqd, unsigned int type)
+{
+	struct irq_chip *chip = irq_data_get_irq_chip(irqd);
+	struct exynos_irq_chip *our_chip = to_exynos_irq_chip(chip);
+	struct samsung_pin_bank *bank = irq_data_get_irq_chip_data(irqd);
+	struct samsung_pin_bank_type *bank_type = bank->type;
+	struct samsung_pinctrl_drv_data *d = bank->drvdata;
+	unsigned int pin = irqd->hwirq;
+	unsigned int shift = EXYNOS_EINT_CON_LEN * pin;
+	unsigned int con, trig_type;
+	unsigned long reg_con = our_chip->eint_con + bank->eint_offset;
+	unsigned long flags;
+	unsigned int mask;
+
+	switch (type) {
+	case IRQ_TYPE_EDGE_RISING:
+		trig_type = EXYNOS_EINT_EDGE_RISING;
+		break;
+	case IRQ_TYPE_EDGE_FALLING:
+		trig_type = EXYNOS_EINT_EDGE_FALLING;
+		break;
+	case IRQ_TYPE_EDGE_BOTH:
+		trig_type = EXYNOS_EINT_EDGE_BOTH;
+		break;
+	case IRQ_TYPE_LEVEL_HIGH:
+		trig_type = EXYNOS_EINT_LEVEL_HIGH;
+		break;
+	case IRQ_TYPE_LEVEL_LOW:
+		trig_type = EXYNOS_EINT_LEVEL_LOW;
+		break;
+	default:
+		pr_err("unsupported external interrupt type\n");
+		return -EINVAL;
+	}
+
+	if (type & IRQ_TYPE_EDGE_BOTH)
+		__irq_set_handler_locked(irqd->irq, handle_edge_irq);
+	else
+		__irq_set_handler_locked(irqd->irq, handle_level_irq);
+
+	con = readl(d->virt_base + reg_con);
+	con &= ~(EXYNOS_EINT_CON_MASK << shift);
+	con |= trig_type << shift;
+	writel(con, d->virt_base + reg_con);
+
+	reg_con = bank->pctl_offset + bank_type->reg_offset[PINCFG_TYPE_FUNC];
+	shift = pin * bank_type->fld_width[PINCFG_TYPE_FUNC];
+	mask = (1 << bank_type->fld_width[PINCFG_TYPE_FUNC]) - 1;
+
+	spin_lock_irqsave(&bank->slock, flags);
+
+	con = readl(d->virt_base + reg_con);
+	con &= ~(mask << shift);
+	con |= EXYNOS_EINT_FUNC << shift;
+	writel(con, d->virt_base + reg_con);
+
+	spin_unlock_irqrestore(&bank->slock, flags);
+
+	return 0;
+}
+
+/*
+ * irq_chip for gpio interrupts.
+ */
+static struct exynos_irq_chip exynos_gpio_irq_chip = {
+	.chip = {
+		.name = "exynos_gpio_irq_chip",
+		.irq_unmask = exynos_irq_unmask,
+		.irq_mask = exynos_irq_mask,
+		.irq_ack = exynos_irq_ack,
+		.irq_set_type = exynos_irq_set_type,
+	},
+	.eint_con = EXYNOS_GPIO_ECON_OFFSET,
+	.eint_mask = EXYNOS_GPIO_EMASK_OFFSET,
+	.eint_pend = EXYNOS_GPIO_EPEND_OFFSET,
+};
+
+static int exynos_gpio_irq_map(struct irq_domain *h, unsigned int virq,
+					irq_hw_number_t hw)
+{
+	struct samsung_pin_bank *b = h->host_data;
+
+	irq_set_chip_data(virq, b);
+	irq_set_chip_and_handler(virq, &exynos_gpio_irq_chip.chip,
+					handle_level_irq);
+	set_irq_flags(virq, IRQF_VALID);
+	return 0;
+}
+
+/*
+ * irq domain callbacks for external gpio interrupt controller.
+ */
+static const struct irq_domain_ops exynos_gpio_irqd_ops = {
+	.map	= exynos_gpio_irq_map,
+	.xlate	= irq_domain_xlate_twocell,
+};
+
+static irqreturn_t exynos_eint_gpio_irq(int irq, void *data)
+{
+	struct samsung_pinctrl_drv_data *d = data;
+	struct samsung_pin_ctrl *ctrl = d->ctrl;
+	struct samsung_pin_bank *bank = ctrl->pin_banks;
+	unsigned int svc, group, pin, virq;
+
+	svc = readl(d->virt_base + EXYNOS_SVC_OFFSET);
+	group = EXYNOS_SVC_GROUP(svc);
+	pin = svc & EXYNOS_SVC_NUM_MASK;
+
+	if (!group)
+		return IRQ_HANDLED;
+	bank += (group - 1);
+
+	virq = irq_linear_revmap(bank->irq_domain, pin);
+	if (!virq)
+		return IRQ_NONE;
+	generic_handle_irq(virq);
+	return IRQ_HANDLED;
+}
+
+struct exynos_eint_gpio_save {
+	u32 eint_con;
+	u32 eint_fltcon0;
+	u32 eint_fltcon1;
+};
+
+/*
+ * exynos_eint_gpio_init() - setup handling of external gpio interrupts.
+ * @d: driver data of samsung pinctrl driver.
+ */
+static int exynos_eint_gpio_init(struct samsung_pinctrl_drv_data *d)
+{
+	struct samsung_pin_bank *bank;
+	struct device *dev = d->dev;
+	int ret;
+	int i;
+
+	if (!d->irq) {
+		dev_err(dev, "irq number not available\n");
+		return -EINVAL;
+	}
+
+	ret = devm_request_irq(dev, d->irq, exynos_eint_gpio_irq,
+					0, dev_name(dev), d);
+	if (ret) {
+		dev_err(dev, "irq request failed\n");
+		return -ENXIO;
+	}
+
+	bank = d->ctrl->pin_banks;
+	for (i = 0; i < d->ctrl->nr_banks; ++i, ++bank) {
+		if (bank->eint_type != EINT_TYPE_GPIO)
+			continue;
+		bank->irq_domain = irq_domain_add_linear(bank->of_node,
+				bank->nr_pins, &exynos_gpio_irqd_ops, bank);
+		if (!bank->irq_domain) {
+			dev_err(dev, "gpio irq domain add failed\n");
+			ret = -ENXIO;
+			goto err_domains;
+		}
+
+		bank->soc_priv = devm_kzalloc(d->dev,
+			sizeof(struct exynos_eint_gpio_save), GFP_KERNEL);
+		if (!bank->soc_priv) {
+			irq_domain_remove(bank->irq_domain);
+			ret = -ENOMEM;
+			goto err_domains;
+		}
+	}
+
+	return 0;
+
+err_domains:
+	for (--i, --bank; i >= 0; --i, --bank) {
+		if (bank->eint_type != EINT_TYPE_GPIO)
+			continue;
+		irq_domain_remove(bank->irq_domain);
+	}
+
+	return ret;
+}
+
+static u32 exynos_eint_wake_mask = 0xffffffff;
+
+u32 exynos_get_eint_wake_mask(void)
+{
+	return exynos_eint_wake_mask;
+}
+
+static int exynos_wkup_irq_set_wake(struct irq_data *irqd, unsigned int on)
+{
+	struct samsung_pin_bank *bank = irq_data_get_irq_chip_data(irqd);
+	unsigned long bit = 1UL << (2 * bank->eint_offset + irqd->hwirq);
+
+	pr_info("wake %s for irq %d\n", on ? "enabled" : "disabled", irqd->irq);
+
+	if (!on)
+		exynos_eint_wake_mask |= bit;
+	else
+		exynos_eint_wake_mask &= ~bit;
+
+	return 0;
+}
+
+/*
+ * irq_chip for wakeup interrupts
+ */
+static struct exynos_irq_chip exynos_wkup_irq_chip = {
+	.chip = {
+		.name = "exynos_wkup_irq_chip",
+		.irq_unmask = exynos_irq_unmask,
+		.irq_mask = exynos_irq_mask,
+		.irq_ack = exynos_irq_ack,
+		.irq_set_type = exynos_irq_set_type,
+		.irq_set_wake = exynos_wkup_irq_set_wake,
+	},
+	.eint_con = EXYNOS_WKUP_ECON_OFFSET,
+	.eint_mask = EXYNOS_WKUP_EMASK_OFFSET,
+	.eint_pend = EXYNOS_WKUP_EPEND_OFFSET,
+};
+
+/* interrupt handler for wakeup interrupts 0..15 */
+static void exynos_irq_eint0_15(unsigned int irq, struct irq_desc *desc)
+{
+	struct exynos_weint_data *eintd = irq_get_handler_data(irq);
+	struct samsung_pin_bank *bank = eintd->bank;
+	struct irq_chip *chip = irq_get_chip(irq);
+	int eint_irq;
+
+	chained_irq_enter(chip, desc);
+	chip->irq_mask(&desc->irq_data);
+
+	if (chip->irq_ack)
+		chip->irq_ack(&desc->irq_data);
+
+	eint_irq = irq_linear_revmap(bank->irq_domain, eintd->irq);
+	generic_handle_irq(eint_irq);
+	chip->irq_unmask(&desc->irq_data);
+	chained_irq_exit(chip, desc);
+}
+
+static inline void exynos_irq_demux_eint(unsigned long pend,
+						struct irq_domain *domain)
+{
+	unsigned int irq;
+
+	while (pend) {
+		irq = fls(pend) - 1;
+		generic_handle_irq(irq_find_mapping(domain, irq));
+		pend &= ~(1 << irq);
+	}
+}
+
+/* interrupt handler for wakeup interrupt 16 */
+static void exynos_irq_demux_eint16_31(unsigned int irq, struct irq_desc *desc)
+{
+	struct irq_chip *chip = irq_get_chip(irq);
+	struct exynos_muxed_weint_data *eintd = irq_get_handler_data(irq);
+	struct samsung_pinctrl_drv_data *d = eintd->banks[0]->drvdata;
+	unsigned long pend;
+	unsigned long mask;
+	int i;
+
+	chained_irq_enter(chip, desc);
+
+	for (i = 0; i < eintd->nr_banks; ++i) {
+		struct samsung_pin_bank *b = eintd->banks[i];
+		pend = readl(d->virt_base + EXYNOS_WKUP_EPEND_OFFSET
+				+ b->eint_offset);
+		mask = readl(d->virt_base + EXYNOS_WKUP_EMASK_OFFSET
+				+ b->eint_offset);
+		exynos_irq_demux_eint(pend & ~mask, b->irq_domain);
+	}
+
+	chained_irq_exit(chip, desc);
+}
+
+static int exynos_wkup_irq_map(struct irq_domain *h, unsigned int virq,
+					irq_hw_number_t hw)
+{
+	irq_set_chip_and_handler(virq, &exynos_wkup_irq_chip.chip,
+					handle_level_irq);
+	irq_set_chip_data(virq, h->host_data);
+	set_irq_flags(virq, IRQF_VALID);
+	return 0;
+}
+
+/*
+ * irq domain callbacks for external wakeup interrupt controller.
+ */
+static const struct irq_domain_ops exynos_wkup_irqd_ops = {
+	.map	= exynos_wkup_irq_map,
+	.xlate	= irq_domain_xlate_twocell,
+};
+
+/*
+ * exynos_eint_wkup_init() - setup handling of external wakeup interrupts.
+ * @d: driver data of samsung pinctrl driver.
+ */
+static int exynos_eint_wkup_init(struct samsung_pinctrl_drv_data *d)
+{
+	struct device *dev = d->dev;
+	struct device_node *wkup_np = NULL;
+	struct device_node *np;
+	struct samsung_pin_bank *bank;
+	struct exynos_weint_data *weint_data;
+	struct exynos_muxed_weint_data *muxed_data;
+	unsigned int muxed_banks = 0;
+	unsigned int i;
+	int idx, irq;
+
+	for_each_child_of_node(dev->of_node, np) {
+		if (of_match_node(exynos_wkup_irq_ids, np)) {
+			wkup_np = np;
+			break;
+		}
+	}
+	if (!wkup_np)
+		return -ENODEV;
+
+	bank = d->ctrl->pin_banks;
+	for (i = 0; i < d->ctrl->nr_banks; ++i, ++bank) {
+		if (bank->eint_type != EINT_TYPE_WKUP)
+			continue;
+
+		bank->irq_domain = irq_domain_add_linear(bank->of_node,
+				bank->nr_pins, &exynos_wkup_irqd_ops, bank);
+		if (!bank->irq_domain) {
+			dev_err(dev, "wkup irq domain add failed\n");
+			return -ENXIO;
+		}
+
+		if (!of_find_property(bank->of_node, "interrupts", NULL)) {
+			bank->eint_type = EINT_TYPE_WKUP_MUX;
+			++muxed_banks;
+			continue;
+		}
+
+		weint_data = devm_kzalloc(dev, bank->nr_pins
+					* sizeof(*weint_data), GFP_KERNEL);
+		if (!weint_data) {
+			dev_err(dev, "could not allocate memory for weint_data\n");
+			return -ENOMEM;
+		}
+
+		for (idx = 0; idx < bank->nr_pins; ++idx) {
+			irq = irq_of_parse_and_map(bank->of_node, idx);
+			if (!irq) {
+				dev_err(dev, "irq number for eint-%s-%d not found\n",
+							bank->name, idx);
+				continue;
+			}
+			weint_data[idx].irq = idx;
+			weint_data[idx].bank = bank;
+			irq_set_handler_data(irq, &weint_data[idx]);
+			irq_set_chained_handler(irq, exynos_irq_eint0_15);
+		}
+	}
+
+	if (!muxed_banks)
+		return 0;
+
+	irq = irq_of_parse_and_map(wkup_np, 0);
+	if (!irq) {
+		dev_err(dev, "irq number for muxed EINTs not found\n");
+		return 0;
+	}
+
+	muxed_data = devm_kzalloc(dev, sizeof(*muxed_data)
+		+ muxed_banks*sizeof(struct samsung_pin_bank *), GFP_KERNEL);
+	if (!muxed_data) {
+		dev_err(dev, "could not allocate memory for muxed_data\n");
+		return -ENOMEM;
+	}
+
+	irq_set_chained_handler(irq, exynos_irq_demux_eint16_31);
+	irq_set_handler_data(irq, muxed_data);
+
+	bank = d->ctrl->pin_banks;
+	idx = 0;
+	for (i = 0; i < d->ctrl->nr_banks; ++i, ++bank) {
+		if (bank->eint_type != EINT_TYPE_WKUP_MUX)
+			continue;
+
+		muxed_data->banks[idx++] = bank;
+	}
+	muxed_data->nr_banks = muxed_banks;
+
+	return 0;
+}
+
+static void exynos_pinctrl_suspend_bank(
+				struct samsung_pinctrl_drv_data *drvdata,
+				struct samsung_pin_bank *bank)
+{
+	struct exynos_eint_gpio_save *save = bank->soc_priv;
+	void __iomem *regs = drvdata->virt_base;
+
+	save->eint_con = readl(regs + EXYNOS_GPIO_ECON_OFFSET
+						+ bank->eint_offset);
+	save->eint_fltcon0 = readl(regs + EXYNOS_GPIO_EFLTCON_OFFSET
+						+ 2 * bank->eint_offset);
+	save->eint_fltcon1 = readl(regs + EXYNOS_GPIO_EFLTCON_OFFSET
+						+ 2 * bank->eint_offset + 4);
+
+	pr_debug("%s: save     con %#010x\n", bank->name, save->eint_con);
+	pr_debug("%s: save fltcon0 %#010x\n", bank->name, save->eint_fltcon0);
+	pr_debug("%s: save fltcon1 %#010x\n", bank->name, save->eint_fltcon1);
+}
+
+static void exynos_pinctrl_suspend(struct samsung_pinctrl_drv_data *drvdata)
+{
+	struct samsung_pin_ctrl *ctrl = drvdata->ctrl;
+	struct samsung_pin_bank *bank = ctrl->pin_banks;
+	int i;
+
+	for (i = 0; i < ctrl->nr_banks; ++i, ++bank)
+		if (bank->eint_type == EINT_TYPE_GPIO)
+			exynos_pinctrl_suspend_bank(drvdata, bank);
+}
+
+static void exynos_pinctrl_resume_bank(
+				struct samsung_pinctrl_drv_data *drvdata,
+				struct samsung_pin_bank *bank)
+{
+	struct exynos_eint_gpio_save *save = bank->soc_priv;
+	void __iomem *regs = drvdata->virt_base;
+
+	pr_debug("%s:     con %#010x => %#010x\n", bank->name,
+			readl(regs + EXYNOS_GPIO_ECON_OFFSET
+			+ bank->eint_offset), save->eint_con);
+	pr_debug("%s: fltcon0 %#010x => %#010x\n", bank->name,
+			readl(regs + EXYNOS_GPIO_EFLTCON_OFFSET
+			+ 2 * bank->eint_offset), save->eint_fltcon0);
+	pr_debug("%s: fltcon1 %#010x => %#010x\n", bank->name,
+			readl(regs + EXYNOS_GPIO_EFLTCON_OFFSET
+			+ 2 * bank->eint_offset + 4), save->eint_fltcon1);
+
+	writel(save->eint_con, regs + EXYNOS_GPIO_ECON_OFFSET
+						+ bank->eint_offset);
+	writel(save->eint_fltcon0, regs + EXYNOS_GPIO_EFLTCON_OFFSET
+						+ 2 * bank->eint_offset);
+	writel(save->eint_fltcon1, regs + EXYNOS_GPIO_EFLTCON_OFFSET
+						+ 2 * bank->eint_offset + 4);
+}
+
+static void exynos_pinctrl_resume(struct samsung_pinctrl_drv_data *drvdata)
+{
+	struct samsung_pin_ctrl *ctrl = drvdata->ctrl;
+	struct samsung_pin_bank *bank = ctrl->pin_banks;
+	int i;
+
+	for (i = 0; i < ctrl->nr_banks; ++i, ++bank)
+		if (bank->eint_type == EINT_TYPE_GPIO)
+			exynos_pinctrl_resume_bank(drvdata, bank);
+}
+
+/* pin banks of s5pv210 pin-controller */
+static struct samsung_pin_bank s5pv210_pin_bank[] = {
+	EXYNOS_PIN_BANK_EINTG(8, 0x000, "gpa0", 0x00),
+	EXYNOS_PIN_BANK_EINTG(4, 0x020, "gpa1", 0x04),
+	EXYNOS_PIN_BANK_EINTG(8, 0x040, "gpb", 0x08),
+	EXYNOS_PIN_BANK_EINTG(5, 0x060, "gpc0", 0x0c),
+	EXYNOS_PIN_BANK_EINTG(5, 0x080, "gpc1", 0x10),
+	EXYNOS_PIN_BANK_EINTG(4, 0x0a0, "gpd0", 0x14),
+	EXYNOS_PIN_BANK_EINTG(6, 0x0c0, "gpd1", 0x18),
+	EXYNOS_PIN_BANK_EINTG(8, 0x0e0, "gpe0", 0x1c),
+	EXYNOS_PIN_BANK_EINTG(5, 0x100, "gpe1", 0x20),
+	EXYNOS_PIN_BANK_EINTG(8, 0x120, "gpf0", 0x24),
+	EXYNOS_PIN_BANK_EINTG(8, 0x140, "gpf1", 0x28),
+	EXYNOS_PIN_BANK_EINTG(8, 0x160, "gpf2", 0x2c),
+	EXYNOS_PIN_BANK_EINTG(6, 0x180, "gpf3", 0x30),
+	EXYNOS_PIN_BANK_EINTG(7, 0x1a0, "gpg0", 0x34),
+	EXYNOS_PIN_BANK_EINTG(7, 0x1c0, "gpg1", 0x38),
+	EXYNOS_PIN_BANK_EINTG(7, 0x1e0, "gpg2", 0x3c),
+	EXYNOS_PIN_BANK_EINTG(7, 0x200, "gpg3", 0x40),
+	EXYNOS_PIN_BANK_EINTN(7, 0x220, "gpi"),
+	EXYNOS_PIN_BANK_EINTG(8, 0x240, "gpj0", 0x44),
+	EXYNOS_PIN_BANK_EINTG(6, 0x260, "gpj1", 0x48),
+	EXYNOS_PIN_BANK_EINTG(8, 0x280, "gpj2", 0x4c),
+	EXYNOS_PIN_BANK_EINTG(8, 0x2a0, "gpj3", 0x50),
+	EXYNOS_PIN_BANK_EINTG(5, 0x2c0, "gpj4", 0x54),
+	EXYNOS_PIN_BANK_EINTN(8, 0x2e0, "mp01"),
+	EXYNOS_PIN_BANK_EINTN(4, 0x300, "mp02"),
+	EXYNOS_PIN_BANK_EINTN(8, 0x320, "mp03"),
+	EXYNOS_PIN_BANK_EINTN(8, 0x340, "mp04"),
+	EXYNOS_PIN_BANK_EINTN(8, 0x360, "mp05"),
+	EXYNOS_PIN_BANK_EINTN(8, 0x380, "mp06"),
+	EXYNOS_PIN_BANK_EINTN(8, 0x3a0, "mp07"),
+	EXYNOS_PIN_BANK_EINTW(8, 0xc00, "gph0", 0x00),
+	EXYNOS_PIN_BANK_EINTW(8, 0xc20, "gph1", 0x04),
+	EXYNOS_PIN_BANK_EINTW(8, 0xc40, "gph2", 0x08),
+	EXYNOS_PIN_BANK_EINTW(8, 0xc60, "gph3", 0x0c),
+};
+
+struct samsung_pin_ctrl s5pv210_pin_ctrl[] = {
+	{
+		/* pin-controller instance 0 data */
+		.pin_banks	= s5pv210_pin_bank,
+		.nr_banks	= ARRAY_SIZE(s5pv210_pin_bank),
+		.eint_gpio_init = exynos_eint_gpio_init,
+		.eint_wkup_init = exynos_eint_wkup_init,
+		.suspend	= exynos_pinctrl_suspend,
+		.resume		= exynos_pinctrl_resume,
+		.label		= "s5pv210-gpio-ctrl0",
+	},
+};
+
+/* pin banks of exynos3250 pin-controller 0 */
+static struct samsung_pin_bank exynos3250_pin_banks0[] = {
+	EXYNOS_PIN_BANK_EINTG(8, 0x000, "gpa0", 0x00),
+	EXYNOS_PIN_BANK_EINTG(6, 0x020, "gpa1", 0x04),
+	EXYNOS_PIN_BANK_EINTG(8, 0x040, "gpb",  0x08),
+	EXYNOS_PIN_BANK_EINTG(5, 0x060, "gpc0", 0x0c),
+	EXYNOS_PIN_BANK_EINTG(5, 0x080, "gpc1", 0x10),
+	EXYNOS_PIN_BANK_EINTG(4, 0x0a0, "gpd0", 0x14),
+	EXYNOS_PIN_BANK_EINTG(4, 0x0c0, "gpd1", 0x18),
+};
+
+/* pin banks of exynos3250 pin-controller 1 */
+static struct samsung_pin_bank exynos3250_pin_banks1[] = {
+	EXYNOS_PIN_BANK_EINTN(8, 0x120, "gpe0"),
+	EXYNOS_PIN_BANK_EINTN(8, 0x140, "gpe1"),
+	EXYNOS_PIN_BANK_EINTN(3, 0x180, "gpe2"),
+	EXYNOS_PIN_BANK_EINTG(8, 0x040, "gpk0", 0x08),
+	EXYNOS_PIN_BANK_EINTG(7, 0x060, "gpk1", 0x0c),
+	EXYNOS_PIN_BANK_EINTG(7, 0x080, "gpk2", 0x10),
+	EXYNOS_PIN_BANK_EINTG(4, 0x0c0, "gpl0", 0x18),
+	EXYNOS_PIN_BANK_EINTG(8, 0x260, "gpm0", 0x24),
+	EXYNOS_PIN_BANK_EINTG(7, 0x280, "gpm1", 0x28),
+	EXYNOS_PIN_BANK_EINTG(5, 0x2a0, "gpm2", 0x2c),
+	EXYNOS_PIN_BANK_EINTG(8, 0x2c0, "gpm3", 0x30),
+	EXYNOS_PIN_BANK_EINTG(8, 0x2e0, "gpm4", 0x34),
+	EXYNOS_PIN_BANK_EINTW(8, 0xc00, "gpx0", 0x00),
+	EXYNOS_PIN_BANK_EINTW(8, 0xc20, "gpx1", 0x04),
+	EXYNOS_PIN_BANK_EINTW(8, 0xc40, "gpx2", 0x08),
+	EXYNOS_PIN_BANK_EINTW(8, 0xc60, "gpx3", 0x0c),
+};
+
+/*
+ * Samsung pinctrl driver data for Exynos3250 SoC. Exynos3250 SoC includes
+ * two gpio/pin-mux/pinconfig controllers.
+ */
+struct samsung_pin_ctrl exynos3250_pin_ctrl[] = {
+	{
+		/* pin-controller instance 0 data */
+		.pin_banks	= exynos3250_pin_banks0,
+		.nr_banks	= ARRAY_SIZE(exynos3250_pin_banks0),
+		.eint_gpio_init = exynos_eint_gpio_init,
+		.suspend	= exynos_pinctrl_suspend,
+		.resume		= exynos_pinctrl_resume,
+		.label		= "exynos3250-gpio-ctrl0",
+	}, {
+		/* pin-controller instance 1 data */
+		.pin_banks	= exynos3250_pin_banks1,
+		.nr_banks	= ARRAY_SIZE(exynos3250_pin_banks1),
+		.eint_gpio_init = exynos_eint_gpio_init,
+		.eint_wkup_init = exynos_eint_wkup_init,
+		.suspend	= exynos_pinctrl_suspend,
+		.resume		= exynos_pinctrl_resume,
+		.label		= "exynos3250-gpio-ctrl1",
+	},
+};
+
+/* pin banks of exynos4210 pin-controller 0 */
+static struct samsung_pin_bank exynos4210_pin_banks0[] = {
+	EXYNOS_PIN_BANK_EINTG(8, 0x000, "gpa0", 0x00),
+	EXYNOS_PIN_BANK_EINTG(6, 0x020, "gpa1", 0x04),
+	EXYNOS_PIN_BANK_EINTG(8, 0x040, "gpb", 0x08),
+	EXYNOS_PIN_BANK_EINTG(5, 0x060, "gpc0", 0x0c),
+	EXYNOS_PIN_BANK_EINTG(5, 0x080, "gpc1", 0x10),
+	EXYNOS_PIN_BANK_EINTG(4, 0x0A0, "gpd0", 0x14),
+	EXYNOS_PIN_BANK_EINTG(4, 0x0C0, "gpd1", 0x18),
+	EXYNOS_PIN_BANK_EINTG(5, 0x0E0, "gpe0", 0x1c),
+	EXYNOS_PIN_BANK_EINTG(8, 0x100, "gpe1", 0x20),
+	EXYNOS_PIN_BANK_EINTG(6, 0x120, "gpe2", 0x24),
+	EXYNOS_PIN_BANK_EINTG(8, 0x140, "gpe3", 0x28),
+	EXYNOS_PIN_BANK_EINTG(8, 0x160, "gpe4", 0x2c),
+	EXYNOS_PIN_BANK_EINTG(8, 0x180, "gpf0", 0x30),
+	EXYNOS_PIN_BANK_EINTG(8, 0x1A0, "gpf1", 0x34),
+	EXYNOS_PIN_BANK_EINTG(8, 0x1C0, "gpf2", 0x38),
+	EXYNOS_PIN_BANK_EINTG(6, 0x1E0, "gpf3", 0x3c),
+};
+
+/* pin banks of exynos4210 pin-controller 1 */
+static struct samsung_pin_bank exynos4210_pin_banks1[] = {
+	EXYNOS_PIN_BANK_EINTG(8, 0x000, "gpj0", 0x00),
+	EXYNOS_PIN_BANK_EINTG(5, 0x020, "gpj1", 0x04),
+	EXYNOS_PIN_BANK_EINTG(7, 0x040, "gpk0", 0x08),
+	EXYNOS_PIN_BANK_EINTG(7, 0x060, "gpk1", 0x0c),
+	EXYNOS_PIN_BANK_EINTG(7, 0x080, "gpk2", 0x10),
+	EXYNOS_PIN_BANK_EINTG(7, 0x0A0, "gpk3", 0x14),
+	EXYNOS_PIN_BANK_EINTG(8, 0x0C0, "gpl0", 0x18),
+	EXYNOS_PIN_BANK_EINTG(3, 0x0E0, "gpl1", 0x1c),
+	EXYNOS_PIN_BANK_EINTG(8, 0x100, "gpl2", 0x20),
+	EXYNOS_PIN_BANK_EINTN(6, 0x120, "gpy0"),
+	EXYNOS_PIN_BANK_EINTN(4, 0x140, "gpy1"),
+	EXYNOS_PIN_BANK_EINTN(6, 0x160, "gpy2"),
+	EXYNOS_PIN_BANK_EINTN(8, 0x180, "gpy3"),
+	EXYNOS_PIN_BANK_EINTN(8, 0x1A0, "gpy4"),
+	EXYNOS_PIN_BANK_EINTN(8, 0x1C0, "gpy5"),
+	EXYNOS_PIN_BANK_EINTN(8, 0x1E0, "gpy6"),
+	EXYNOS_PIN_BANK_EINTW(8, 0xC00, "gpx0", 0x00),
+	EXYNOS_PIN_BANK_EINTW(8, 0xC20, "gpx1", 0x04),
+	EXYNOS_PIN_BANK_EINTW(8, 0xC40, "gpx2", 0x08),
+	EXYNOS_PIN_BANK_EINTW(8, 0xC60, "gpx3", 0x0c),
+};
+
+/* pin banks of exynos4210 pin-controller 2 */
+static struct samsung_pin_bank exynos4210_pin_banks2[] = {
+	EXYNOS_PIN_BANK_EINTN(7, 0x000, "gpz"),
+};
+
+/*
+ * Samsung pinctrl driver data for Exynos4210 SoC. Exynos4210 SoC includes
+ * three gpio/pin-mux/pinconfig controllers.
+ */
+struct samsung_pin_ctrl exynos4210_pin_ctrl[] = {
+	{
+		/* pin-controller instance 0 data */
+		.pin_banks	= exynos4210_pin_banks0,
+		.nr_banks	= ARRAY_SIZE(exynos4210_pin_banks0),
+		.eint_gpio_init = exynos_eint_gpio_init,
+		.suspend	= exynos_pinctrl_suspend,
+		.resume		= exynos_pinctrl_resume,
+		.label		= "exynos4210-gpio-ctrl0",
+	}, {
+		/* pin-controller instance 1 data */
+		.pin_banks	= exynos4210_pin_banks1,
+		.nr_banks	= ARRAY_SIZE(exynos4210_pin_banks1),
+		.eint_gpio_init = exynos_eint_gpio_init,
+		.eint_wkup_init = exynos_eint_wkup_init,
+		.suspend	= exynos_pinctrl_suspend,
+		.resume		= exynos_pinctrl_resume,
+		.label		= "exynos4210-gpio-ctrl1",
+	}, {
+		/* pin-controller instance 2 data */
+		.pin_banks	= exynos4210_pin_banks2,
+		.nr_banks	= ARRAY_SIZE(exynos4210_pin_banks2),
+		.label		= "exynos4210-gpio-ctrl2",
+	},
+};
+
+/* pin banks of exynos4x12 pin-controller 0 */
+static struct samsung_pin_bank exynos4x12_pin_banks0[] = {
+	EXYNOS_PIN_BANK_EINTG(8, 0x000, "gpa0", 0x00),
+	EXYNOS_PIN_BANK_EINTG(6, 0x020, "gpa1", 0x04),
+	EXYNOS_PIN_BANK_EINTG(8, 0x040, "gpb", 0x08),
+	EXYNOS_PIN_BANK_EINTG(5, 0x060, "gpc0", 0x0c),
+	EXYNOS_PIN_BANK_EINTG(5, 0x080, "gpc1", 0x10),
+	EXYNOS_PIN_BANK_EINTG(4, 0x0A0, "gpd0", 0x14),
+	EXYNOS_PIN_BANK_EINTG(4, 0x0C0, "gpd1", 0x18),
+	EXYNOS_PIN_BANK_EINTG(8, 0x180, "gpf0", 0x30),
+	EXYNOS_PIN_BANK_EINTG(8, 0x1A0, "gpf1", 0x34),
+	EXYNOS_PIN_BANK_EINTG(8, 0x1C0, "gpf2", 0x38),
+	EXYNOS_PIN_BANK_EINTG(6, 0x1E0, "gpf3", 0x3c),
+	EXYNOS_PIN_BANK_EINTG(8, 0x240, "gpj0", 0x40),
+	EXYNOS_PIN_BANK_EINTG(5, 0x260, "gpj1", 0x44),
+};
+
+/* pin banks of exynos4x12 pin-controller 1 */
+static struct samsung_pin_bank exynos4x12_pin_banks1[] = {
+	EXYNOS_PIN_BANK_EINTG(7, 0x040, "gpk0", 0x08),
+	EXYNOS_PIN_BANK_EINTG(7, 0x060, "gpk1", 0x0c),
+	EXYNOS_PIN_BANK_EINTG(7, 0x080, "gpk2", 0x10),
+	EXYNOS_PIN_BANK_EINTG(7, 0x0A0, "gpk3", 0x14),
+	EXYNOS_PIN_BANK_EINTG(7, 0x0C0, "gpl0", 0x18),
+	EXYNOS_PIN_BANK_EINTG(2, 0x0E0, "gpl1", 0x1c),
+	EXYNOS_PIN_BANK_EINTG(8, 0x100, "gpl2", 0x20),
+	EXYNOS_PIN_BANK_EINTG(8, 0x260, "gpm0", 0x24),
+	EXYNOS_PIN_BANK_EINTG(7, 0x280, "gpm1", 0x28),
+	EXYNOS_PIN_BANK_EINTG(5, 0x2A0, "gpm2", 0x2c),
+	EXYNOS_PIN_BANK_EINTG(8, 0x2C0, "gpm3", 0x30),
+	EXYNOS_PIN_BANK_EINTG(8, 0x2E0, "gpm4", 0x34),
+	EXYNOS_PIN_BANK_EINTN(6, 0x120, "gpy0"),
+	EXYNOS_PIN_BANK_EINTN(4, 0x140, "gpy1"),
+	EXYNOS_PIN_BANK_EINTN(6, 0x160, "gpy2"),
+	EXYNOS_PIN_BANK_EINTN(8, 0x180, "gpy3"),
+	EXYNOS_PIN_BANK_EINTN(8, 0x1A0, "gpy4"),
+	EXYNOS_PIN_BANK_EINTN(8, 0x1C0, "gpy5"),
+	EXYNOS_PIN_BANK_EINTN(8, 0x1E0, "gpy6"),
+	EXYNOS_PIN_BANK_EINTW(8, 0xC00, "gpx0", 0x00),
+	EXYNOS_PIN_BANK_EINTW(8, 0xC20, "gpx1", 0x04),
+	EXYNOS_PIN_BANK_EINTW(8, 0xC40, "gpx2", 0x08),
+	EXYNOS_PIN_BANK_EINTW(8, 0xC60, "gpx3", 0x0c),
+};
+
+/* pin banks of exynos4x12 pin-controller 2 */
+static struct samsung_pin_bank exynos4x12_pin_banks2[] = {
+	EXYNOS_PIN_BANK_EINTG(7, 0x000, "gpz", 0x00),
+};
+
+/* pin banks of exynos4x12 pin-controller 3 */
+static struct samsung_pin_bank exynos4x12_pin_banks3[] = {
+	EXYNOS_PIN_BANK_EINTG(8, 0x000, "gpv0", 0x00),
+	EXYNOS_PIN_BANK_EINTG(8, 0x020, "gpv1", 0x04),
+	EXYNOS_PIN_BANK_EINTG(8, 0x040, "gpv2", 0x08),
+	EXYNOS_PIN_BANK_EINTG(8, 0x060, "gpv3", 0x0c),
+	EXYNOS_PIN_BANK_EINTG(2, 0x080, "gpv4", 0x10),
+};
+
+/*
+ * Samsung pinctrl driver data for Exynos4x12 SoC. Exynos4x12 SoC includes
+ * four gpio/pin-mux/pinconfig controllers.
+ */
+struct samsung_pin_ctrl exynos4x12_pin_ctrl[] = {
+	{
+		/* pin-controller instance 0 data */
+		.pin_banks	= exynos4x12_pin_banks0,
+		.nr_banks	= ARRAY_SIZE(exynos4x12_pin_banks0),
+		.eint_gpio_init = exynos_eint_gpio_init,
+		.suspend	= exynos_pinctrl_suspend,
+		.resume		= exynos_pinctrl_resume,
+		.label		= "exynos4x12-gpio-ctrl0",
+	}, {
+		/* pin-controller instance 1 data */
+		.pin_banks	= exynos4x12_pin_banks1,
+		.nr_banks	= ARRAY_SIZE(exynos4x12_pin_banks1),
+		.eint_gpio_init = exynos_eint_gpio_init,
+		.eint_wkup_init = exynos_eint_wkup_init,
+		.suspend	= exynos_pinctrl_suspend,
+		.resume		= exynos_pinctrl_resume,
+		.label		= "exynos4x12-gpio-ctrl1",
+	}, {
+		/* pin-controller instance 2 data */
+		.pin_banks	= exynos4x12_pin_banks2,
+		.nr_banks	= ARRAY_SIZE(exynos4x12_pin_banks2),
+		.eint_gpio_init = exynos_eint_gpio_init,
+		.suspend	= exynos_pinctrl_suspend,
+		.resume		= exynos_pinctrl_resume,
+		.label		= "exynos4x12-gpio-ctrl2",
+	}, {
+		/* pin-controller instance 3 data */
+		.pin_banks	= exynos4x12_pin_banks3,
+		.nr_banks	= ARRAY_SIZE(exynos4x12_pin_banks3),
+		.eint_gpio_init = exynos_eint_gpio_init,
+		.suspend	= exynos_pinctrl_suspend,
+		.resume		= exynos_pinctrl_resume,
+		.label		= "exynos4x12-gpio-ctrl3",
+	},
+};
+
+/* pin banks of exynos5250 pin-controller 0 */
+static struct samsung_pin_bank exynos5250_pin_banks0[] = {
+	EXYNOS_PIN_BANK_EINTG(8, 0x000, "gpa0", 0x00),
+	EXYNOS_PIN_BANK_EINTG(6, 0x020, "gpa1", 0x04),
+	EXYNOS_PIN_BANK_EINTG(8, 0x040, "gpa2", 0x08),
+	EXYNOS_PIN_BANK_EINTG(5, 0x060, "gpb0", 0x0c),
+	EXYNOS_PIN_BANK_EINTG(5, 0x080, "gpb1", 0x10),
+	EXYNOS_PIN_BANK_EINTG(4, 0x0A0, "gpb2", 0x14),
+	EXYNOS_PIN_BANK_EINTG(4, 0x0C0, "gpb3", 0x18),
+	EXYNOS_PIN_BANK_EINTG(7, 0x0E0, "gpc0", 0x1c),
+	EXYNOS_PIN_BANK_EINTG(4, 0x100, "gpc1", 0x20),
+	EXYNOS_PIN_BANK_EINTG(7, 0x120, "gpc2", 0x24),
+	EXYNOS_PIN_BANK_EINTG(7, 0x140, "gpc3", 0x28),
+	EXYNOS_PIN_BANK_EINTG(4, 0x160, "gpd0", 0x2c),
+	EXYNOS_PIN_BANK_EINTG(8, 0x180, "gpd1", 0x30),
+	EXYNOS_PIN_BANK_EINTG(7, 0x2E0, "gpc4", 0x34),
+	EXYNOS_PIN_BANK_EINTN(6, 0x1A0, "gpy0"),
+	EXYNOS_PIN_BANK_EINTN(4, 0x1C0, "gpy1"),
+	EXYNOS_PIN_BANK_EINTN(6, 0x1E0, "gpy2"),
+	EXYNOS_PIN_BANK_EINTN(8, 0x200, "gpy3"),
+	EXYNOS_PIN_BANK_EINTN(8, 0x220, "gpy4"),
+	EXYNOS_PIN_BANK_EINTN(8, 0x240, "gpy5"),
+	EXYNOS_PIN_BANK_EINTN(8, 0x260, "gpy6"),
+	EXYNOS_PIN_BANK_EINTW(8, 0xC00, "gpx0", 0x00),
+	EXYNOS_PIN_BANK_EINTW(8, 0xC20, "gpx1", 0x04),
+	EXYNOS_PIN_BANK_EINTW(8, 0xC40, "gpx2", 0x08),
+	EXYNOS_PIN_BANK_EINTW(8, 0xC60, "gpx3", 0x0c),
+};
+
+/* pin banks of exynos5250 pin-controller 1 */
+static struct samsung_pin_bank exynos5250_pin_banks1[] = {
+	EXYNOS_PIN_BANK_EINTG(8, 0x000, "gpe0", 0x00),
+	EXYNOS_PIN_BANK_EINTG(2, 0x020, "gpe1", 0x04),
+	EXYNOS_PIN_BANK_EINTG(4, 0x040, "gpf0", 0x08),
+	EXYNOS_PIN_BANK_EINTG(4, 0x060, "gpf1", 0x0c),
+	EXYNOS_PIN_BANK_EINTG(8, 0x080, "gpg0", 0x10),
+	EXYNOS_PIN_BANK_EINTG(8, 0x0A0, "gpg1", 0x14),
+	EXYNOS_PIN_BANK_EINTG(2, 0x0C0, "gpg2", 0x18),
+	EXYNOS_PIN_BANK_EINTG(4, 0x0E0, "gph0", 0x1c),
+	EXYNOS_PIN_BANK_EINTG(8, 0x100, "gph1", 0x20),
+};
+
+/* pin banks of exynos5250 pin-controller 2 */
+static struct samsung_pin_bank exynos5250_pin_banks2[] = {
+	EXYNOS_PIN_BANK_EINTG(8, 0x000, "gpv0", 0x00),
+	EXYNOS_PIN_BANK_EINTG(8, 0x020, "gpv1", 0x04),
+	EXYNOS_PIN_BANK_EINTG(8, 0x060, "gpv2", 0x08),
+	EXYNOS_PIN_BANK_EINTG(8, 0x080, "gpv3", 0x0c),
+	EXYNOS_PIN_BANK_EINTG(2, 0x0C0, "gpv4", 0x10),
+};
+
+/* pin banks of exynos5250 pin-controller 3 */
+static struct samsung_pin_bank exynos5250_pin_banks3[] = {
+	EXYNOS_PIN_BANK_EINTG(7, 0x000, "gpz", 0x00),
+};
+
+/*
+ * Samsung pinctrl driver data for Exynos5250 SoC. Exynos5250 SoC includes
+ * four gpio/pin-mux/pinconfig controllers.
+ */
+struct samsung_pin_ctrl exynos5250_pin_ctrl[] = {
+	{
+		/* pin-controller instance 0 data */
+		.pin_banks	= exynos5250_pin_banks0,
+		.nr_banks	= ARRAY_SIZE(exynos5250_pin_banks0),
+		.eint_gpio_init = exynos_eint_gpio_init,
+		.eint_wkup_init = exynos_eint_wkup_init,
+		.suspend	= exynos_pinctrl_suspend,
+		.resume		= exynos_pinctrl_resume,
+		.label		= "exynos5250-gpio-ctrl0",
+	}, {
+		/* pin-controller instance 1 data */
+		.pin_banks	= exynos5250_pin_banks1,
+		.nr_banks	= ARRAY_SIZE(exynos5250_pin_banks1),
+		.eint_gpio_init = exynos_eint_gpio_init,
+		.suspend	= exynos_pinctrl_suspend,
+		.resume		= exynos_pinctrl_resume,
+		.label		= "exynos5250-gpio-ctrl1",
+	}, {
+		/* pin-controller instance 2 data */
+		.pin_banks	= exynos5250_pin_banks2,
+		.nr_banks	= ARRAY_SIZE(exynos5250_pin_banks2),
+		.eint_gpio_init = exynos_eint_gpio_init,
+		.suspend	= exynos_pinctrl_suspend,
+		.resume		= exynos_pinctrl_resume,
+		.label		= "exynos5250-gpio-ctrl2",
+	}, {
+		/* pin-controller instance 3 data */
+		.pin_banks	= exynos5250_pin_banks3,
+		.nr_banks	= ARRAY_SIZE(exynos5250_pin_banks3),
+		.eint_gpio_init = exynos_eint_gpio_init,
+		.suspend	= exynos_pinctrl_suspend,
+		.resume		= exynos_pinctrl_resume,
+		.label		= "exynos5250-gpio-ctrl3",
+	},
+};
+
+/* pin banks of exynos5260 pin-controller 0 */
+static struct samsung_pin_bank exynos5260_pin_banks0[] = {
+	EXYNOS_PIN_BANK_EINTG(4, 0x000, "gpa0", 0x00),
+	EXYNOS_PIN_BANK_EINTG(7, 0x020, "gpa1", 0x04),
+	EXYNOS_PIN_BANK_EINTG(8, 0x040, "gpa2", 0x08),
+	EXYNOS_PIN_BANK_EINTG(5, 0x060, "gpb0", 0x0c),
+	EXYNOS_PIN_BANK_EINTG(4, 0x080, "gpb1", 0x10),
+	EXYNOS_PIN_BANK_EINTG(5, 0x0a0, "gpb2", 0x14),
+	EXYNOS_PIN_BANK_EINTG(8, 0x0c0, "gpb3", 0x18),
+	EXYNOS_PIN_BANK_EINTG(8, 0x0e0, "gpb4", 0x1c),
+	EXYNOS_PIN_BANK_EINTG(8, 0x100, "gpb5", 0x20),
+	EXYNOS_PIN_BANK_EINTG(8, 0x120, "gpd0", 0x24),
+	EXYNOS_PIN_BANK_EINTG(7, 0x140, "gpd1", 0x28),
+	EXYNOS_PIN_BANK_EINTG(5, 0x160, "gpd2", 0x2c),
+	EXYNOS_PIN_BANK_EINTG(8, 0x180, "gpe0", 0x30),
+	EXYNOS_PIN_BANK_EINTG(5, 0x1a0, "gpe1", 0x34),
+	EXYNOS_PIN_BANK_EINTG(4, 0x1c0, "gpf0", 0x38),
+	EXYNOS_PIN_BANK_EINTG(8, 0x1e0, "gpf1", 0x3c),
+	EXYNOS_PIN_BANK_EINTG(2, 0x200, "gpk0", 0x40),
+	EXYNOS_PIN_BANK_EINTW(8, 0xc00, "gpx0", 0x00),
+	EXYNOS_PIN_BANK_EINTW(8, 0xc20, "gpx1", 0x04),
+	EXYNOS_PIN_BANK_EINTW(8, 0xc40, "gpx2", 0x08),
+	EXYNOS_PIN_BANK_EINTW(8, 0xc60, "gpx3", 0x0c),
+};
+
+/* pin banks of exynos5260 pin-controller 1 */
+static struct samsung_pin_bank exynos5260_pin_banks1[] = {
+	EXYNOS_PIN_BANK_EINTG(7, 0x000, "gpc0", 0x00),
+	EXYNOS_PIN_BANK_EINTG(6, 0x020, "gpc1", 0x04),
+	EXYNOS_PIN_BANK_EINTG(7, 0x040, "gpc2", 0x08),
+	EXYNOS_PIN_BANK_EINTG(4, 0x060, "gpc3", 0x0c),
+	EXYNOS_PIN_BANK_EINTG(4, 0x080, "gpc4", 0x10),
+};
+
+/* pin banks of exynos5260 pin-controller 2 */
+static struct samsung_pin_bank exynos5260_pin_banks2[] = {
+	EXYNOS_PIN_BANK_EINTG(7, 0x000, "gpz0", 0x00),
+	EXYNOS_PIN_BANK_EINTG(4, 0x020, "gpz1", 0x04),
+};
+
+/*
+ * Samsung pinctrl driver data for Exynos5260 SoC. Exynos5260 SoC includes
+ * three gpio/pin-mux/pinconfig controllers.
+ */
+struct samsung_pin_ctrl exynos5260_pin_ctrl[] = {
+	{
+		/* pin-controller instance 0 data */
+		.pin_banks	= exynos5260_pin_banks0,
+		.nr_banks	= ARRAY_SIZE(exynos5260_pin_banks0),
+		.eint_gpio_init = exynos_eint_gpio_init,
+		.eint_wkup_init = exynos_eint_wkup_init,
+		.label		= "exynos5260-gpio-ctrl0",
+	}, {
+		/* pin-controller instance 1 data */
+		.pin_banks	= exynos5260_pin_banks1,
+		.nr_banks	= ARRAY_SIZE(exynos5260_pin_banks1),
+		.eint_gpio_init = exynos_eint_gpio_init,
+		.label		= "exynos5260-gpio-ctrl1",
+	}, {
+		/* pin-controller instance 2 data */
+		.pin_banks	= exynos5260_pin_banks2,
+		.nr_banks	= ARRAY_SIZE(exynos5260_pin_banks2),
+		.eint_gpio_init = exynos_eint_gpio_init,
+		.label		= "exynos5260-gpio-ctrl2",
+	},
+};
+
+/* pin banks of exynos5420 pin-controller 0 */
+static struct samsung_pin_bank exynos5420_pin_banks0[] = {
+	EXYNOS_PIN_BANK_EINTG(8, 0x000, "gpy7", 0x00),
+	EXYNOS_PIN_BANK_EINTW(8, 0xC00, "gpx0", 0x00),
+	EXYNOS_PIN_BANK_EINTW(8, 0xC20, "gpx1", 0x04),
+	EXYNOS_PIN_BANK_EINTW(8, 0xC40, "gpx2", 0x08),
+	EXYNOS_PIN_BANK_EINTW(8, 0xC60, "gpx3", 0x0c),
+};
+
+/* pin banks of exynos5420 pin-controller 1 */
+static struct samsung_pin_bank exynos5420_pin_banks1[] = {
+	EXYNOS_PIN_BANK_EINTG(8, 0x000, "gpc0", 0x00),
+	EXYNOS_PIN_BANK_EINTG(8, 0x020, "gpc1", 0x04),
+	EXYNOS_PIN_BANK_EINTG(7, 0x040, "gpc2", 0x08),
+	EXYNOS_PIN_BANK_EINTG(4, 0x060, "gpc3", 0x0c),
+	EXYNOS_PIN_BANK_EINTG(2, 0x080, "gpc4", 0x10),
+	EXYNOS_PIN_BANK_EINTG(8, 0x0A0, "gpd1", 0x14),
+	EXYNOS_PIN_BANK_EINTN(6, 0x0C0, "gpy0"),
+	EXYNOS_PIN_BANK_EINTN(4, 0x0E0, "gpy1"),
+	EXYNOS_PIN_BANK_EINTN(6, 0x100, "gpy2"),
+	EXYNOS_PIN_BANK_EINTN(8, 0x120, "gpy3"),
+	EXYNOS_PIN_BANK_EINTN(8, 0x140, "gpy4"),
+	EXYNOS_PIN_BANK_EINTN(8, 0x160, "gpy5"),
+	EXYNOS_PIN_BANK_EINTN(8, 0x180, "gpy6"),
+};
+
+/* pin banks of exynos5420 pin-controller 2 */
+static struct samsung_pin_bank exynos5420_pin_banks2[] = {
+	EXYNOS_PIN_BANK_EINTG(8, 0x000, "gpe0", 0x00),
+	EXYNOS_PIN_BANK_EINTG(2, 0x020, "gpe1", 0x04),
+	EXYNOS_PIN_BANK_EINTG(6, 0x040, "gpf0", 0x08),
+	EXYNOS_PIN_BANK_EINTG(8, 0x060, "gpf1", 0x0c),
+	EXYNOS_PIN_BANK_EINTG(8, 0x080, "gpg0", 0x10),
+	EXYNOS_PIN_BANK_EINTG(8, 0x0A0, "gpg1", 0x14),
+	EXYNOS_PIN_BANK_EINTG(2, 0x0C0, "gpg2", 0x18),
+	EXYNOS_PIN_BANK_EINTG(4, 0x0E0, "gpj4", 0x1c),
+};
+
+/* pin banks of exynos5420 pin-controller 3 */
+static struct samsung_pin_bank exynos5420_pin_banks3[] = {
+	EXYNOS_PIN_BANK_EINTG(8, 0x000, "gpa0", 0x00),
+	EXYNOS_PIN_BANK_EINTG(6, 0x020, "gpa1", 0x04),
+	EXYNOS_PIN_BANK_EINTG(8, 0x040, "gpa2", 0x08),
+	EXYNOS_PIN_BANK_EINTG(5, 0x060, "gpb0", 0x0c),
+	EXYNOS_PIN_BANK_EINTG(5, 0x080, "gpb1", 0x10),
+	EXYNOS_PIN_BANK_EINTG(4, 0x0A0, "gpb2", 0x14),
+	EXYNOS_PIN_BANK_EINTG(8, 0x0C0, "gpb3", 0x18),
+	EXYNOS_PIN_BANK_EINTG(2, 0x0E0, "gpb4", 0x1c),
+	EXYNOS_PIN_BANK_EINTG(8, 0x100, "gph0", 0x20),
+};
+
+/* pin banks of exynos5420 pin-controller 4 */
+static struct samsung_pin_bank exynos5420_pin_banks4[] = {
+	EXYNOS_PIN_BANK_EINTG(7, 0x000, "gpz", 0x00),
+};
+
+/*
+ * Samsung pinctrl driver data for Exynos5420 SoC. Exynos5420 SoC includes
+ * four gpio/pin-mux/pinconfig controllers.
+ */
+struct samsung_pin_ctrl exynos5420_pin_ctrl[] = {
+	{
+		/* pin-controller instance 0 data */
+		.pin_banks	= exynos5420_pin_banks0,
+		.nr_banks	= ARRAY_SIZE(exynos5420_pin_banks0),
+		.eint_gpio_init = exynos_eint_gpio_init,
+		.eint_wkup_init = exynos_eint_wkup_init,
+		.label		= "exynos5420-gpio-ctrl0",
+	}, {
+		/* pin-controller instance 1 data */
+		.pin_banks	= exynos5420_pin_banks1,
+		.nr_banks	= ARRAY_SIZE(exynos5420_pin_banks1),
+		.eint_gpio_init = exynos_eint_gpio_init,
+		.label		= "exynos5420-gpio-ctrl1",
+	}, {
+		/* pin-controller instance 2 data */
+		.pin_banks	= exynos5420_pin_banks2,
+		.nr_banks	= ARRAY_SIZE(exynos5420_pin_banks2),
+		.eint_gpio_init = exynos_eint_gpio_init,
+		.label		= "exynos5420-gpio-ctrl2",
+	}, {
+		/* pin-controller instance 3 data */
+		.pin_banks	= exynos5420_pin_banks3,
+		.nr_banks	= ARRAY_SIZE(exynos5420_pin_banks3),
+		.eint_gpio_init = exynos_eint_gpio_init,
+		.label		= "exynos5420-gpio-ctrl3",
+	}, {
+		/* pin-controller instance 4 data */
+		.pin_banks	= exynos5420_pin_banks4,
+		.nr_banks	= ARRAY_SIZE(exynos5420_pin_banks4),
+		.eint_gpio_init = exynos_eint_gpio_init,
+		.label		= "exynos5420-gpio-ctrl4",
+	},
+};
diff --git a/drivers/pinctrl/samsung/pinctrl-exynos.h b/drivers/pinctrl/samsung/pinctrl-exynos.h
new file mode 100644
index 0000000..3c91c35
--- /dev/null
+++ b/drivers/pinctrl/samsung/pinctrl-exynos.h
@@ -0,0 +1,99 @@
+/*
+ * Exynos specific definitions for Samsung pinctrl and gpiolib driver.
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com
+ * Copyright (c) 2012 Linaro Ltd
+ *		http://www.linaro.org
+ *
+ * This file contains the Exynos specific definitions for the Samsung
+ * pinctrl/gpiolib interface drivers.
+ *
+ * Author: Thomas Abraham <thomas.ab@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+/* External GPIO and wakeup interrupt related definitions */
+#define EXYNOS_GPIO_ECON_OFFSET		0x700
+#define EXYNOS_GPIO_EFLTCON_OFFSET	0x800
+#define EXYNOS_GPIO_EMASK_OFFSET	0x900
+#define EXYNOS_GPIO_EPEND_OFFSET	0xA00
+#define EXYNOS_WKUP_ECON_OFFSET		0xE00
+#define EXYNOS_WKUP_EMASK_OFFSET	0xF00
+#define EXYNOS_WKUP_EPEND_OFFSET	0xF40
+#define EXYNOS_SVC_OFFSET		0xB08
+#define EXYNOS_EINT_FUNC		0xF
+
+/* helpers to access interrupt service register */
+#define EXYNOS_SVC_GROUP_SHIFT		3
+#define EXYNOS_SVC_GROUP_MASK		0x1f
+#define EXYNOS_SVC_NUM_MASK		7
+#define EXYNOS_SVC_GROUP(x)		((x >> EXYNOS_SVC_GROUP_SHIFT) & \
+						EXYNOS_SVC_GROUP_MASK)
+
+/* Exynos specific external interrupt trigger types */
+#define EXYNOS_EINT_LEVEL_LOW		0
+#define EXYNOS_EINT_LEVEL_HIGH		1
+#define EXYNOS_EINT_EDGE_FALLING	2
+#define EXYNOS_EINT_EDGE_RISING		3
+#define EXYNOS_EINT_EDGE_BOTH		4
+#define EXYNOS_EINT_CON_MASK		0xF
+#define EXYNOS_EINT_CON_LEN		4
+
+#define EXYNOS_EINT_MAX_PER_BANK	8
+#define EXYNOS_EINT_NR_WKUP_EINT
+
+#define EXYNOS_PIN_BANK_EINTN(pins, reg, id)		\
+	{						\
+		.type		= &bank_type_off,	\
+		.pctl_offset	= reg,			\
+		.nr_pins	= pins,			\
+		.eint_type	= EINT_TYPE_NONE,	\
+		.name		= id			\
+	}
+
+#define EXYNOS_PIN_BANK_EINTG(pins, reg, id, offs)	\
+	{						\
+		.type		= &bank_type_off,	\
+		.pctl_offset	= reg,			\
+		.nr_pins	= pins,			\
+		.eint_type	= EINT_TYPE_GPIO,	\
+		.eint_offset	= offs,			\
+		.name		= id			\
+	}
+
+#define EXYNOS_PIN_BANK_EINTW(pins, reg, id, offs)	\
+	{						\
+		.type		= &bank_type_alive,	\
+		.pctl_offset	= reg,			\
+		.nr_pins	= pins,			\
+		.eint_type	= EINT_TYPE_WKUP,	\
+		.eint_offset	= offs,			\
+		.name		= id			\
+	}
+
+/**
+ * struct exynos_weint_data: irq specific data for all the wakeup interrupts
+ * generated by the external wakeup interrupt controller.
+ * @irq: interrupt number within the domain.
+ * @bank: bank responsible for this interrupt
+ */
+struct exynos_weint_data {
+	unsigned int irq;
+	struct samsung_pin_bank *bank;
+};
+
+/**
+ * struct exynos_muxed_weint_data: irq specific data for muxed wakeup interrupts
+ * generated by the external wakeup interrupt controller.
+ * @nr_banks: count of banks being part of the mux
+ * @banks: array of banks being part of the mux
+ */
+struct exynos_muxed_weint_data {
+	unsigned int nr_banks;
+	struct samsung_pin_bank *banks[];
+};
diff --git a/drivers/pinctrl/samsung/pinctrl-exynos5440.c b/drivers/pinctrl/samsung/pinctrl-exynos5440.c
new file mode 100644
index 0000000..603da2f
--- /dev/null
+++ b/drivers/pinctrl/samsung/pinctrl-exynos5440.c
@@ -0,0 +1,1061 @@
+/*
+ * pin-controller/pin-mux/pin-config/gpio-driver for Samsung's EXYNOS5440 SoC.
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/gpio.h>
+#include <linux/device.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/interrupt.h>
+#include <linux/irqdomain.h>
+#include <linux/of_irq.h>
+#include "../core.h"
+
+/* EXYNOS5440 GPIO and Pinctrl register offsets */
+#define GPIO_MUX		0x00
+#define GPIO_IE			0x04
+#define GPIO_INT		0x08
+#define GPIO_TYPE		0x0C
+#define GPIO_VAL		0x10
+#define GPIO_OE			0x14
+#define GPIO_IN			0x18
+#define GPIO_PE			0x1C
+#define GPIO_PS			0x20
+#define GPIO_SR			0x24
+#define GPIO_DS0		0x28
+#define GPIO_DS1		0x2C
+
+#define EXYNOS5440_MAX_PINS		23
+#define EXYNOS5440_MAX_GPIO_INT	8
+#define PIN_NAME_LENGTH		10
+
+#define GROUP_SUFFIX		"-grp"
+#define GSUFFIX_LEN		sizeof(GROUP_SUFFIX)
+#define FUNCTION_SUFFIX		"-mux"
+#define FSUFFIX_LEN		sizeof(FUNCTION_SUFFIX)
+
+/*
+ * pin configuration type and its value are packed together into a 16-bits.
+ * The upper 8-bits represent the configuration type and the lower 8-bits
+ * hold the value of the configuration type.
+ */
+#define PINCFG_TYPE_MASK		0xFF
+#define PINCFG_VALUE_SHIFT		8
+#define PINCFG_VALUE_MASK		(0xFF << PINCFG_VALUE_SHIFT)
+#define PINCFG_PACK(type, value)	(((value) << PINCFG_VALUE_SHIFT) | type)
+#define PINCFG_UNPACK_TYPE(cfg)		((cfg) & PINCFG_TYPE_MASK)
+#define PINCFG_UNPACK_VALUE(cfg)	(((cfg) & PINCFG_VALUE_MASK) >> \
+						PINCFG_VALUE_SHIFT)
+
+/**
+ * enum pincfg_type - possible pin configuration types supported.
+ * @PINCFG_TYPE_PUD: Pull up/down configuration.
+ * @PINCFG_TYPE_DRV: Drive strength configuration.
+ * @PINCFG_TYPE_SKEW_RATE: Skew rate configuration.
+ * @PINCFG_TYPE_INPUT_TYPE: Pin input type configuration.
+ */
+enum pincfg_type {
+	PINCFG_TYPE_PUD,
+	PINCFG_TYPE_DRV,
+	PINCFG_TYPE_SKEW_RATE,
+	PINCFG_TYPE_INPUT_TYPE
+};
+
+/**
+ * struct exynos5440_pin_group: represent group of pins for pincfg setting.
+ * @name: name of the pin group, used to lookup the group.
+ * @pins: the pins included in this group.
+ * @num_pins: number of pins included in this group.
+ */
+struct exynos5440_pin_group {
+	const char		*name;
+	const unsigned int	*pins;
+	u8			num_pins;
+};
+
+/**
+ * struct exynos5440_pmx_func: represent a pin function.
+ * @name: name of the pin function, used to lookup the function.
+ * @groups: one or more names of pin groups that provide this function.
+ * @num_groups: number of groups included in @groups.
+ * @function: the function number to be programmed when selected.
+ */
+struct exynos5440_pmx_func {
+	const char		*name;
+	const char		**groups;
+	u8			num_groups;
+	unsigned long		function;
+};
+
+/**
+ * struct exynos5440_pinctrl_priv_data: driver's private runtime data.
+ * @reg_base: ioremapped based address of the register space.
+ * @gc: gpio chip registered with gpiolib.
+ * @pin_groups: list of pin groups parsed from device tree.
+ * @nr_groups: number of pin groups available.
+ * @pmx_functions: list of pin functions parsed from device tree.
+ * @nr_functions: number of pin functions available.
+ */
+struct exynos5440_pinctrl_priv_data {
+	void __iomem			*reg_base;
+	struct gpio_chip		*gc;
+	struct irq_domain		*irq_domain;
+
+	const struct exynos5440_pin_group	*pin_groups;
+	unsigned int			nr_groups;
+	const struct exynos5440_pmx_func	*pmx_functions;
+	unsigned int			nr_functions;
+};
+
+/**
+ * struct exynos5440_gpio_intr_data: private data for gpio interrupts.
+ * @priv: driver's private runtime data.
+ * @gpio_int: gpio interrupt number.
+ */
+struct exynos5440_gpio_intr_data {
+	struct exynos5440_pinctrl_priv_data	*priv;
+	unsigned int				gpio_int;
+};
+
+/* list of all possible config options supported */
+static struct pin_config {
+	char		*prop_cfg;
+	unsigned int	cfg_type;
+} pcfgs[] = {
+	{ "samsung,exynos5440-pin-pud", PINCFG_TYPE_PUD },
+	{ "samsung,exynos5440-pin-drv", PINCFG_TYPE_DRV },
+	{ "samsung,exynos5440-pin-skew-rate", PINCFG_TYPE_SKEW_RATE },
+	{ "samsung,exynos5440-pin-input-type", PINCFG_TYPE_INPUT_TYPE },
+};
+
+/* check if the selector is a valid pin group selector */
+static int exynos5440_get_group_count(struct pinctrl_dev *pctldev)
+{
+	struct exynos5440_pinctrl_priv_data *priv;
+
+	priv = pinctrl_dev_get_drvdata(pctldev);
+	return priv->nr_groups;
+}
+
+/* return the name of the group selected by the group selector */
+static const char *exynos5440_get_group_name(struct pinctrl_dev *pctldev,
+						unsigned selector)
+{
+	struct exynos5440_pinctrl_priv_data *priv;
+
+	priv = pinctrl_dev_get_drvdata(pctldev);
+	return priv->pin_groups[selector].name;
+}
+
+/* return the pin numbers associated with the specified group */
+static int exynos5440_get_group_pins(struct pinctrl_dev *pctldev,
+		unsigned selector, const unsigned **pins, unsigned *num_pins)
+{
+	struct exynos5440_pinctrl_priv_data *priv;
+
+	priv = pinctrl_dev_get_drvdata(pctldev);
+	*pins = priv->pin_groups[selector].pins;
+	*num_pins = priv->pin_groups[selector].num_pins;
+	return 0;
+}
+
+/* create pinctrl_map entries by parsing device tree nodes */
+static int exynos5440_dt_node_to_map(struct pinctrl_dev *pctldev,
+			struct device_node *np, struct pinctrl_map **maps,
+			unsigned *nmaps)
+{
+	struct device *dev = pctldev->dev;
+	struct pinctrl_map *map;
+	unsigned long *cfg = NULL;
+	char *gname, *fname;
+	int cfg_cnt = 0, map_cnt = 0, idx = 0;
+
+	/* count the number of config options specfied in the node */
+	for (idx = 0; idx < ARRAY_SIZE(pcfgs); idx++)
+		if (of_find_property(np, pcfgs[idx].prop_cfg, NULL))
+			cfg_cnt++;
+
+	/*
+	 * Find out the number of map entries to create. All the config options
+	 * can be accomadated into a single config map entry.
+	 */
+	if (cfg_cnt)
+		map_cnt = 1;
+	if (of_find_property(np, "samsung,exynos5440-pin-function", NULL))
+		map_cnt++;
+	if (!map_cnt) {
+		dev_err(dev, "node %s does not have either config or function "
+				"configurations\n", np->name);
+		return -EINVAL;
+	}
+
+	/* Allocate memory for pin-map entries */
+	map = kzalloc(sizeof(*map) * map_cnt, GFP_KERNEL);
+	if (!map) {
+		dev_err(dev, "could not alloc memory for pin-maps\n");
+		return -ENOMEM;
+	}
+	*nmaps = 0;
+
+	/*
+	 * Allocate memory for pin group name. The pin group name is derived
+	 * from the node name from which these map entries are be created.
+	 */
+	gname = kzalloc(strlen(np->name) + GSUFFIX_LEN, GFP_KERNEL);
+	if (!gname) {
+		dev_err(dev, "failed to alloc memory for group name\n");
+		goto free_map;
+	}
+	snprintf(gname, strlen(np->name) + 4, "%s%s", np->name, GROUP_SUFFIX);
+
+	/*
+	 * don't have config options? then skip over to creating function
+	 * map entries.
+	 */
+	if (!cfg_cnt)
+		goto skip_cfgs;
+
+	/* Allocate memory for config entries */
+	cfg = kzalloc(sizeof(*cfg) * cfg_cnt, GFP_KERNEL);
+	if (!cfg) {
+		dev_err(dev, "failed to alloc memory for configs\n");
+		goto free_gname;
+	}
+
+	/* Prepare a list of config settings */
+	for (idx = 0, cfg_cnt = 0; idx < ARRAY_SIZE(pcfgs); idx++) {
+		u32 value;
+		if (!of_property_read_u32(np, pcfgs[idx].prop_cfg, &value))
+			cfg[cfg_cnt++] =
+				PINCFG_PACK(pcfgs[idx].cfg_type, value);
+	}
+
+	/* create the config map entry */
+	map[*nmaps].data.configs.group_or_pin = gname;
+	map[*nmaps].data.configs.configs = cfg;
+	map[*nmaps].data.configs.num_configs = cfg_cnt;
+	map[*nmaps].type = PIN_MAP_TYPE_CONFIGS_GROUP;
+	*nmaps += 1;
+
+skip_cfgs:
+	/* create the function map entry */
+	if (of_find_property(np, "samsung,exynos5440-pin-function", NULL)) {
+		fname = kzalloc(strlen(np->name) + FSUFFIX_LEN,	GFP_KERNEL);
+		if (!fname) {
+			dev_err(dev, "failed to alloc memory for func name\n");
+			goto free_cfg;
+		}
+		snprintf(fname, strlen(np->name) + 4, "%s%s", np->name,
+			 FUNCTION_SUFFIX);
+
+		map[*nmaps].data.mux.group = gname;
+		map[*nmaps].data.mux.function = fname;
+		map[*nmaps].type = PIN_MAP_TYPE_MUX_GROUP;
+		*nmaps += 1;
+	}
+
+	*maps = map;
+	return 0;
+
+free_cfg:
+	kfree(cfg);
+free_gname:
+	kfree(gname);
+free_map:
+	kfree(map);
+	return -ENOMEM;
+}
+
+/* free the memory allocated to hold the pin-map table */
+static void exynos5440_dt_free_map(struct pinctrl_dev *pctldev,
+			     struct pinctrl_map *map, unsigned num_maps)
+{
+	int idx;
+
+	for (idx = 0; idx < num_maps; idx++) {
+		if (map[idx].type == PIN_MAP_TYPE_MUX_GROUP) {
+			kfree(map[idx].data.mux.function);
+			if (!idx)
+				kfree(map[idx].data.mux.group);
+		} else if (map->type == PIN_MAP_TYPE_CONFIGS_GROUP) {
+			kfree(map[idx].data.configs.configs);
+			if (!idx)
+				kfree(map[idx].data.configs.group_or_pin);
+		}
+	};
+
+	kfree(map);
+}
+
+/* list of pinctrl callbacks for the pinctrl core */
+static const struct pinctrl_ops exynos5440_pctrl_ops = {
+	.get_groups_count	= exynos5440_get_group_count,
+	.get_group_name		= exynos5440_get_group_name,
+	.get_group_pins		= exynos5440_get_group_pins,
+	.dt_node_to_map		= exynos5440_dt_node_to_map,
+	.dt_free_map		= exynos5440_dt_free_map,
+};
+
+/* check if the selector is a valid pin function selector */
+static int exynos5440_get_functions_count(struct pinctrl_dev *pctldev)
+{
+	struct exynos5440_pinctrl_priv_data *priv;
+
+	priv = pinctrl_dev_get_drvdata(pctldev);
+	return priv->nr_functions;
+}
+
+/* return the name of the pin function specified */
+static const char *exynos5440_pinmux_get_fname(struct pinctrl_dev *pctldev,
+						unsigned selector)
+{
+	struct exynos5440_pinctrl_priv_data *priv;
+
+	priv = pinctrl_dev_get_drvdata(pctldev);
+	return priv->pmx_functions[selector].name;
+}
+
+/* return the groups associated for the specified function selector */
+static int exynos5440_pinmux_get_groups(struct pinctrl_dev *pctldev,
+		unsigned selector, const char * const **groups,
+		unsigned * const num_groups)
+{
+	struct exynos5440_pinctrl_priv_data *priv;
+
+	priv = pinctrl_dev_get_drvdata(pctldev);
+	*groups = priv->pmx_functions[selector].groups;
+	*num_groups = priv->pmx_functions[selector].num_groups;
+	return 0;
+}
+
+/* enable or disable a pinmux function */
+static void exynos5440_pinmux_setup(struct pinctrl_dev *pctldev, unsigned selector,
+					unsigned group, bool enable)
+{
+	struct exynos5440_pinctrl_priv_data *priv;
+	void __iomem *base;
+	u32 function;
+	u32 data;
+
+	priv = pinctrl_dev_get_drvdata(pctldev);
+	base = priv->reg_base;
+	function = priv->pmx_functions[selector].function;
+
+	data = readl(base + GPIO_MUX);
+	if (enable)
+		data |= (1 << function);
+	else
+		data &= ~(1 << function);
+	writel(data, base + GPIO_MUX);
+}
+
+/* enable a specified pinmux by writing to registers */
+static int exynos5440_pinmux_enable(struct pinctrl_dev *pctldev, unsigned selector,
+					unsigned group)
+{
+	exynos5440_pinmux_setup(pctldev, selector, group, true);
+	return 0;
+}
+
+/*
+ * The calls to gpio_direction_output() and gpio_direction_input()
+ * leads to this function call (via the pinctrl_gpio_direction_{input|output}()
+ * function called from the gpiolib interface).
+ */
+static int exynos5440_pinmux_gpio_set_direction(struct pinctrl_dev *pctldev,
+		struct pinctrl_gpio_range *range, unsigned offset, bool input)
+{
+	return 0;
+}
+
+/* list of pinmux callbacks for the pinmux vertical in pinctrl core */
+static const struct pinmux_ops exynos5440_pinmux_ops = {
+	.get_functions_count	= exynos5440_get_functions_count,
+	.get_function_name	= exynos5440_pinmux_get_fname,
+	.get_function_groups	= exynos5440_pinmux_get_groups,
+	.enable			= exynos5440_pinmux_enable,
+	.gpio_set_direction	= exynos5440_pinmux_gpio_set_direction,
+};
+
+/* set the pin config settings for a specified pin */
+static int exynos5440_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
+				unsigned long *configs,
+				unsigned num_configs)
+{
+	struct exynos5440_pinctrl_priv_data *priv;
+	void __iomem *base;
+	enum pincfg_type cfg_type;
+	u32 cfg_value;
+	u32 data;
+	int i;
+
+	priv = pinctrl_dev_get_drvdata(pctldev);
+	base = priv->reg_base;
+
+	for (i = 0; i < num_configs; i++) {
+		cfg_type = PINCFG_UNPACK_TYPE(configs[i]);
+		cfg_value = PINCFG_UNPACK_VALUE(configs[i]);
+
+		switch (cfg_type) {
+		case PINCFG_TYPE_PUD:
+			/* first set pull enable/disable bit */
+			data = readl(base + GPIO_PE);
+			data &= ~(1 << pin);
+			if (cfg_value)
+				data |= (1 << pin);
+			writel(data, base + GPIO_PE);
+
+			/* then set pull up/down bit */
+			data = readl(base + GPIO_PS);
+			data &= ~(1 << pin);
+			if (cfg_value == 2)
+				data |= (1 << pin);
+			writel(data, base + GPIO_PS);
+			break;
+
+		case PINCFG_TYPE_DRV:
+			/* set the first bit of the drive strength */
+			data = readl(base + GPIO_DS0);
+			data &= ~(1 << pin);
+			data |= ((cfg_value & 1) << pin);
+			writel(data, base + GPIO_DS0);
+			cfg_value >>= 1;
+
+			/* set the second bit of the driver strength */
+			data = readl(base + GPIO_DS1);
+			data &= ~(1 << pin);
+			data |= ((cfg_value & 1) << pin);
+			writel(data, base + GPIO_DS1);
+			break;
+		case PINCFG_TYPE_SKEW_RATE:
+			data = readl(base + GPIO_SR);
+			data &= ~(1 << pin);
+			data |= ((cfg_value & 1) << pin);
+			writel(data, base + GPIO_SR);
+			break;
+		case PINCFG_TYPE_INPUT_TYPE:
+			data = readl(base + GPIO_TYPE);
+			data &= ~(1 << pin);
+			data |= ((cfg_value & 1) << pin);
+			writel(data, base + GPIO_TYPE);
+			break;
+		default:
+			WARN_ON(1);
+			return -EINVAL;
+		}
+	} /* for each config */
+
+	return 0;
+}
+
+/* get the pin config settings for a specified pin */
+static int exynos5440_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin,
+					unsigned long *config)
+{
+	struct exynos5440_pinctrl_priv_data *priv;
+	void __iomem *base;
+	enum pincfg_type cfg_type = PINCFG_UNPACK_TYPE(*config);
+	u32 data;
+
+	priv = pinctrl_dev_get_drvdata(pctldev);
+	base = priv->reg_base;
+
+	switch (cfg_type) {
+	case PINCFG_TYPE_PUD:
+		data = readl(base + GPIO_PE);
+		data = (data >> pin) & 1;
+		if (!data)
+			*config = 0;
+		else
+			*config = ((readl(base + GPIO_PS) >> pin) & 1) + 1;
+		break;
+	case PINCFG_TYPE_DRV:
+		data = readl(base + GPIO_DS0);
+		data = (data >> pin) & 1;
+		*config = data;
+		data = readl(base + GPIO_DS1);
+		data = (data >> pin) & 1;
+		*config |= (data << 1);
+		break;
+	case PINCFG_TYPE_SKEW_RATE:
+		data = readl(base + GPIO_SR);
+		*config = (data >> pin) & 1;
+		break;
+	case PINCFG_TYPE_INPUT_TYPE:
+		data = readl(base + GPIO_TYPE);
+		*config = (data >> pin) & 1;
+		break;
+	default:
+		WARN_ON(1);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+/* set the pin config settings for a specified pin group */
+static int exynos5440_pinconf_group_set(struct pinctrl_dev *pctldev,
+			unsigned group, unsigned long *configs,
+			unsigned num_configs)
+{
+	struct exynos5440_pinctrl_priv_data *priv;
+	const unsigned int *pins;
+	unsigned int cnt;
+
+	priv = pinctrl_dev_get_drvdata(pctldev);
+	pins = priv->pin_groups[group].pins;
+
+	for (cnt = 0; cnt < priv->pin_groups[group].num_pins; cnt++)
+		exynos5440_pinconf_set(pctldev, pins[cnt], configs,
+				       num_configs);
+
+	return 0;
+}
+
+/* get the pin config settings for a specified pin group */
+static int exynos5440_pinconf_group_get(struct pinctrl_dev *pctldev,
+				unsigned int group, unsigned long *config)
+{
+	struct exynos5440_pinctrl_priv_data *priv;
+	const unsigned int *pins;
+
+	priv = pinctrl_dev_get_drvdata(pctldev);
+	pins = priv->pin_groups[group].pins;
+	exynos5440_pinconf_get(pctldev, pins[0], config);
+	return 0;
+}
+
+/* list of pinconfig callbacks for pinconfig vertical in the pinctrl code */
+static const struct pinconf_ops exynos5440_pinconf_ops = {
+	.pin_config_get		= exynos5440_pinconf_get,
+	.pin_config_set		= exynos5440_pinconf_set,
+	.pin_config_group_get	= exynos5440_pinconf_group_get,
+	.pin_config_group_set	= exynos5440_pinconf_group_set,
+};
+
+/* gpiolib gpio_set callback function */
+static void exynos5440_gpio_set(struct gpio_chip *gc, unsigned offset, int value)
+{
+	struct exynos5440_pinctrl_priv_data *priv = dev_get_drvdata(gc->dev);
+	void __iomem *base = priv->reg_base;
+	u32 data;
+
+	data = readl(base + GPIO_VAL);
+	data &= ~(1 << offset);
+	if (value)
+		data |= 1 << offset;
+	writel(data, base + GPIO_VAL);
+}
+
+/* gpiolib gpio_get callback function */
+static int exynos5440_gpio_get(struct gpio_chip *gc, unsigned offset)
+{
+	struct exynos5440_pinctrl_priv_data *priv = dev_get_drvdata(gc->dev);
+	void __iomem *base = priv->reg_base;
+	u32 data;
+
+	data = readl(base + GPIO_IN);
+	data >>= offset;
+	data &= 1;
+	return data;
+}
+
+/* gpiolib gpio_direction_input callback function */
+static int exynos5440_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
+{
+	struct exynos5440_pinctrl_priv_data *priv = dev_get_drvdata(gc->dev);
+	void __iomem *base = priv->reg_base;
+	u32 data;
+
+	/* first disable the data output enable on this pin */
+	data = readl(base + GPIO_OE);
+	data &= ~(1 << offset);
+	writel(data, base + GPIO_OE);
+
+	/* now enable input on this pin */
+	data =  readl(base + GPIO_IE);
+	data |= 1 << offset;
+	writel(data, base + GPIO_IE);
+	return 0;
+}
+
+/* gpiolib gpio_direction_output callback function */
+static int exynos5440_gpio_direction_output(struct gpio_chip *gc, unsigned offset,
+							int value)
+{
+	struct exynos5440_pinctrl_priv_data *priv = dev_get_drvdata(gc->dev);
+	void __iomem *base = priv->reg_base;
+	u32 data;
+
+	exynos5440_gpio_set(gc, offset, value);
+
+	/* first disable the data input enable on this pin */
+	data = readl(base + GPIO_IE);
+	data &= ~(1 << offset);
+	writel(data, base + GPIO_IE);
+
+	/* now enable output on this pin */
+	data =  readl(base + GPIO_OE);
+	data |= 1 << offset;
+	writel(data, base + GPIO_OE);
+	return 0;
+}
+
+/* gpiolib gpio_to_irq callback function */
+static int exynos5440_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
+{
+	struct exynos5440_pinctrl_priv_data *priv = dev_get_drvdata(gc->dev);
+	unsigned int virq;
+
+	if (offset < 16 || offset > 23)
+		return -ENXIO;
+
+	if (!priv->irq_domain)
+		return -ENXIO;
+
+	virq = irq_create_mapping(priv->irq_domain, offset - 16);
+	return virq ? : -ENXIO;
+}
+
+/* parse the pin numbers listed in the 'samsung,exynos5440-pins' property */
+static int exynos5440_pinctrl_parse_dt_pins(struct platform_device *pdev,
+			struct device_node *cfg_np, unsigned int **pin_list,
+			unsigned int *npins)
+{
+	struct device *dev = &pdev->dev;
+	struct property *prop;
+
+	prop = of_find_property(cfg_np, "samsung,exynos5440-pins", NULL);
+	if (!prop)
+		return -ENOENT;
+
+	*npins = prop->length / sizeof(unsigned long);
+	if (!*npins) {
+		dev_err(dev, "invalid pin list in %s node", cfg_np->name);
+		return -EINVAL;
+	}
+
+	*pin_list = devm_kzalloc(dev, *npins * sizeof(**pin_list), GFP_KERNEL);
+	if (!*pin_list) {
+		dev_err(dev, "failed to allocate memory for pin list\n");
+		return -ENOMEM;
+	}
+
+	return of_property_read_u32_array(cfg_np, "samsung,exynos5440-pins",
+			*pin_list, *npins);
+}
+
+/*
+ * Parse the information about all the available pin groups and pin functions
+ * from device node of the pin-controller.
+ */
+static int exynos5440_pinctrl_parse_dt(struct platform_device *pdev,
+				struct exynos5440_pinctrl_priv_data *priv)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *dev_np = dev->of_node;
+	struct device_node *cfg_np;
+	struct exynos5440_pin_group *groups, *grp;
+	struct exynos5440_pmx_func *functions, *func;
+	unsigned *pin_list;
+	unsigned int npins, grp_cnt, func_idx = 0;
+	char *gname, *fname;
+	int ret;
+
+	grp_cnt = of_get_child_count(dev_np);
+	if (!grp_cnt)
+		return -EINVAL;
+
+	groups = devm_kzalloc(dev, grp_cnt * sizeof(*groups), GFP_KERNEL);
+	if (!groups) {
+		dev_err(dev, "failed allocate memory for ping group list\n");
+		return -EINVAL;
+	}
+	grp = groups;
+
+	functions = devm_kzalloc(dev, grp_cnt * sizeof(*functions), GFP_KERNEL);
+	if (!functions) {
+		dev_err(dev, "failed to allocate memory for function list\n");
+		return -EINVAL;
+	}
+	func = functions;
+
+	/*
+	 * Iterate over all the child nodes of the pin controller node
+	 * and create pin groups and pin function lists.
+	 */
+	for_each_child_of_node(dev_np, cfg_np) {
+		u32 function;
+
+		ret = exynos5440_pinctrl_parse_dt_pins(pdev, cfg_np,
+					&pin_list, &npins);
+		if (ret) {
+			gname = NULL;
+			goto skip_to_pin_function;
+		}
+
+		/* derive pin group name from the node name */
+		gname = devm_kzalloc(dev, strlen(cfg_np->name) + GSUFFIX_LEN,
+					GFP_KERNEL);
+		if (!gname) {
+			dev_err(dev, "failed to alloc memory for group name\n");
+			return -ENOMEM;
+		}
+		snprintf(gname, strlen(cfg_np->name) + 4, "%s%s", cfg_np->name,
+			 GROUP_SUFFIX);
+
+		grp->name = gname;
+		grp->pins = pin_list;
+		grp->num_pins = npins;
+		grp++;
+
+skip_to_pin_function:
+		ret = of_property_read_u32(cfg_np, "samsung,exynos5440-pin-function",
+						&function);
+		if (ret)
+			continue;
+
+		/* derive function name from the node name */
+		fname = devm_kzalloc(dev, strlen(cfg_np->name) + FSUFFIX_LEN,
+					GFP_KERNEL);
+		if (!fname) {
+			dev_err(dev, "failed to alloc memory for func name\n");
+			return -ENOMEM;
+		}
+		snprintf(fname, strlen(cfg_np->name) + 4, "%s%s", cfg_np->name,
+			 FUNCTION_SUFFIX);
+
+		func->name = fname;
+		func->groups = devm_kzalloc(dev, sizeof(char *), GFP_KERNEL);
+		if (!func->groups) {
+			dev_err(dev, "failed to alloc memory for group list "
+					"in pin function");
+			return -ENOMEM;
+		}
+		func->groups[0] = gname;
+		func->num_groups = gname ? 1 : 0;
+		func->function = function;
+		func++;
+		func_idx++;
+	}
+
+	priv->pin_groups = groups;
+	priv->nr_groups = grp_cnt;
+	priv->pmx_functions = functions;
+	priv->nr_functions = func_idx;
+	return 0;
+}
+
+/* register the pinctrl interface with the pinctrl subsystem */
+static int exynos5440_pinctrl_register(struct platform_device *pdev,
+				struct exynos5440_pinctrl_priv_data *priv)
+{
+	struct device *dev = &pdev->dev;
+	struct pinctrl_desc *ctrldesc;
+	struct pinctrl_dev *pctl_dev;
+	struct pinctrl_pin_desc *pindesc, *pdesc;
+	struct pinctrl_gpio_range grange;
+	char *pin_names;
+	int pin, ret;
+
+	ctrldesc = devm_kzalloc(dev, sizeof(*ctrldesc), GFP_KERNEL);
+	if (!ctrldesc) {
+		dev_err(dev, "could not allocate memory for pinctrl desc\n");
+		return -ENOMEM;
+	}
+
+	ctrldesc->name = "exynos5440-pinctrl";
+	ctrldesc->owner = THIS_MODULE;
+	ctrldesc->pctlops = &exynos5440_pctrl_ops;
+	ctrldesc->pmxops = &exynos5440_pinmux_ops;
+	ctrldesc->confops = &exynos5440_pinconf_ops;
+
+	pindesc = devm_kzalloc(&pdev->dev, sizeof(*pindesc) *
+				EXYNOS5440_MAX_PINS, GFP_KERNEL);
+	if (!pindesc) {
+		dev_err(&pdev->dev, "mem alloc for pin descriptors failed\n");
+		return -ENOMEM;
+	}
+	ctrldesc->pins = pindesc;
+	ctrldesc->npins = EXYNOS5440_MAX_PINS;
+
+	/* dynamically populate the pin number and pin name for pindesc */
+	for (pin = 0, pdesc = pindesc; pin < ctrldesc->npins; pin++, pdesc++)
+		pdesc->number = pin;
+
+	/*
+	 * allocate space for storing the dynamically generated names for all
+	 * the pins which belong to this pin-controller.
+	 */
+	pin_names = devm_kzalloc(&pdev->dev, sizeof(char) * PIN_NAME_LENGTH *
+					ctrldesc->npins, GFP_KERNEL);
+	if (!pin_names) {
+		dev_err(&pdev->dev, "mem alloc for pin names failed\n");
+		return -ENOMEM;
+	}
+
+	/* for each pin, set the name of the pin */
+	for (pin = 0; pin < ctrldesc->npins; pin++) {
+		snprintf(pin_names, 6, "gpio%02d", pin);
+		pdesc = pindesc + pin;
+		pdesc->name = pin_names;
+		pin_names += PIN_NAME_LENGTH;
+	}
+
+	ret = exynos5440_pinctrl_parse_dt(pdev, priv);
+	if (ret)
+		return ret;
+
+	pctl_dev = pinctrl_register(ctrldesc, &pdev->dev, priv);
+	if (!pctl_dev) {
+		dev_err(&pdev->dev, "could not register pinctrl driver\n");
+		return -EINVAL;
+	}
+
+	grange.name = "exynos5440-pctrl-gpio-range";
+	grange.id = 0;
+	grange.base = 0;
+	grange.npins = EXYNOS5440_MAX_PINS;
+	grange.gc = priv->gc;
+	pinctrl_add_gpio_range(pctl_dev, &grange);
+	return 0;
+}
+
+/* register the gpiolib interface with the gpiolib subsystem */
+static int exynos5440_gpiolib_register(struct platform_device *pdev,
+				struct exynos5440_pinctrl_priv_data *priv)
+{
+	struct gpio_chip *gc;
+	int ret;
+
+	gc = devm_kzalloc(&pdev->dev, sizeof(*gc), GFP_KERNEL);
+	if (!gc) {
+		dev_err(&pdev->dev, "mem alloc for gpio_chip failed\n");
+		return -ENOMEM;
+	}
+
+	priv->gc = gc;
+	gc->base = 0;
+	gc->ngpio = EXYNOS5440_MAX_PINS;
+	gc->dev = &pdev->dev;
+	gc->set = exynos5440_gpio_set;
+	gc->get = exynos5440_gpio_get;
+	gc->direction_input = exynos5440_gpio_direction_input;
+	gc->direction_output = exynos5440_gpio_direction_output;
+	gc->to_irq = exynos5440_gpio_to_irq;
+	gc->label = "gpiolib-exynos5440";
+	gc->owner = THIS_MODULE;
+	ret = gpiochip_add(gc);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to register gpio_chip %s, error "
+					"code: %d\n", gc->label, ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+/* unregister the gpiolib interface with the gpiolib subsystem */
+static int exynos5440_gpiolib_unregister(struct platform_device *pdev,
+				struct exynos5440_pinctrl_priv_data *priv)
+{
+	int ret = gpiochip_remove(priv->gc);
+	if (ret) {
+		dev_err(&pdev->dev, "gpio chip remove failed\n");
+		return ret;
+	}
+	return 0;
+}
+
+static void exynos5440_gpio_irq_unmask(struct irq_data *irqd)
+{
+	struct exynos5440_pinctrl_priv_data *d;
+	unsigned long gpio_int;
+
+	d = irq_data_get_irq_chip_data(irqd);
+	gpio_int = readl(d->reg_base + GPIO_INT);
+	gpio_int |= 1 << irqd->hwirq;
+	writel(gpio_int, d->reg_base + GPIO_INT);
+}
+
+static void exynos5440_gpio_irq_mask(struct irq_data *irqd)
+{
+	struct exynos5440_pinctrl_priv_data *d;
+	unsigned long gpio_int;
+
+	d = irq_data_get_irq_chip_data(irqd);
+	gpio_int = readl(d->reg_base + GPIO_INT);
+	gpio_int &= ~(1 << irqd->hwirq);
+	writel(gpio_int, d->reg_base + GPIO_INT);
+}
+
+/* irq_chip for gpio interrupts */
+static struct irq_chip exynos5440_gpio_irq_chip = {
+	.name		= "exynos5440_gpio_irq_chip",
+	.irq_unmask	= exynos5440_gpio_irq_unmask,
+	.irq_mask	= exynos5440_gpio_irq_mask,
+};
+
+/* interrupt handler for GPIO interrupts 0..7 */
+static irqreturn_t exynos5440_gpio_irq(int irq, void *data)
+{
+	struct exynos5440_gpio_intr_data *intd = data;
+	struct exynos5440_pinctrl_priv_data *d = intd->priv;
+	int virq;
+
+	virq = irq_linear_revmap(d->irq_domain, intd->gpio_int);
+	if (!virq)
+		return IRQ_NONE;
+	generic_handle_irq(virq);
+	return IRQ_HANDLED;
+}
+
+static int exynos5440_gpio_irq_map(struct irq_domain *h, unsigned int virq,
+					irq_hw_number_t hw)
+{
+	struct exynos5440_pinctrl_priv_data *d = h->host_data;
+
+	irq_set_chip_data(virq, d);
+	irq_set_chip_and_handler(virq, &exynos5440_gpio_irq_chip,
+					handle_level_irq);
+	set_irq_flags(virq, IRQF_VALID);
+	return 0;
+}
+
+/* irq domain callbacks for gpio interrupt controller */
+static const struct irq_domain_ops exynos5440_gpio_irqd_ops = {
+	.map	= exynos5440_gpio_irq_map,
+	.xlate	= irq_domain_xlate_twocell,
+};
+
+/* setup handling of gpio interrupts */
+static int exynos5440_gpio_irq_init(struct platform_device *pdev,
+				struct exynos5440_pinctrl_priv_data *priv)
+{
+	struct device *dev = &pdev->dev;
+	struct exynos5440_gpio_intr_data *intd;
+	int i, irq, ret;
+
+	intd = devm_kzalloc(dev, sizeof(*intd) * EXYNOS5440_MAX_GPIO_INT,
+					GFP_KERNEL);
+	if (!intd) {
+		dev_err(dev, "failed to allocate memory for gpio intr data\n");
+		return -ENOMEM;
+	}
+
+	for (i = 0; i < EXYNOS5440_MAX_GPIO_INT; i++) {
+		irq = irq_of_parse_and_map(dev->of_node, i);
+		if (irq <= 0) {
+			dev_err(dev, "irq parsing failed\n");
+			return -EINVAL;
+		}
+
+		intd->gpio_int = i;
+		intd->priv = priv;
+		ret = devm_request_irq(dev, irq, exynos5440_gpio_irq,
+					0, dev_name(dev), intd++);
+		if (ret) {
+			dev_err(dev, "irq request failed\n");
+			return -ENXIO;
+		}
+	}
+
+	priv->irq_domain = irq_domain_add_linear(dev->of_node,
+				EXYNOS5440_MAX_GPIO_INT,
+				&exynos5440_gpio_irqd_ops, priv);
+	if (!priv->irq_domain) {
+		dev_err(dev, "failed to create irq domain\n");
+		return -ENXIO;
+	}
+
+	return 0;
+}
+
+static int exynos5440_pinctrl_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct exynos5440_pinctrl_priv_data *priv;
+	struct resource *res;
+	int ret;
+
+	if (!dev->of_node) {
+		dev_err(dev, "device tree node not found\n");
+		return -ENODEV;
+	}
+
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv) {
+		dev_err(dev, "could not allocate memory for private data\n");
+		return -ENOMEM;
+	}
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	priv->reg_base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(priv->reg_base))
+		return PTR_ERR(priv->reg_base);
+
+	ret = exynos5440_gpiolib_register(pdev, priv);
+	if (ret)
+		return ret;
+
+	ret = exynos5440_pinctrl_register(pdev, priv);
+	if (ret) {
+		exynos5440_gpiolib_unregister(pdev, priv);
+		return ret;
+	}
+
+	ret = exynos5440_gpio_irq_init(pdev, priv);
+	if (ret) {
+		dev_err(dev, "failed to setup gpio interrupts\n");
+		return ret;
+	}
+
+	platform_set_drvdata(pdev, priv);
+	dev_info(dev, "EXYNOS5440 pinctrl driver registered\n");
+	return 0;
+}
+
+static const struct of_device_id exynos5440_pinctrl_dt_match[] = {
+	{ .compatible = "samsung,exynos5440-pinctrl" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, exynos5440_pinctrl_dt_match);
+
+static struct platform_driver exynos5440_pinctrl_driver = {
+	.probe		= exynos5440_pinctrl_probe,
+	.driver = {
+		.name	= "exynos5440-pinctrl",
+		.owner	= THIS_MODULE,
+		.of_match_table = exynos5440_pinctrl_dt_match,
+	},
+};
+
+static int __init exynos5440_pinctrl_drv_register(void)
+{
+	return platform_driver_register(&exynos5440_pinctrl_driver);
+}
+postcore_initcall(exynos5440_pinctrl_drv_register);
+
+static void __exit exynos5440_pinctrl_drv_unregister(void)
+{
+	platform_driver_unregister(&exynos5440_pinctrl_driver);
+}
+module_exit(exynos5440_pinctrl_drv_unregister);
+
+MODULE_AUTHOR("Thomas Abraham <thomas.ab@samsung.com>");
+MODULE_DESCRIPTION("Samsung EXYNOS5440 SoC pinctrl driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/pinctrl/samsung/pinctrl-s3c24xx.c b/drivers/pinctrl/samsung/pinctrl-s3c24xx.c
new file mode 100644
index 0000000..ad3eaad
--- /dev/null
+++ b/drivers/pinctrl/samsung/pinctrl-s3c24xx.c
@@ -0,0 +1,651 @@
+/*
+ * S3C24XX specific support for Samsung pinctrl/gpiolib driver.
+ *
+ * Copyright (c) 2013 Heiko Stuebner <heiko@sntech.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This file contains the SamsungS3C24XX specific information required by the
+ * Samsung pinctrl/gpiolib driver. It also includes the implementation of
+ * external gpio and wakeup interrupt support.
+ */
+
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/interrupt.h>
+#include <linux/irqdomain.h>
+#include <linux/irq.h>
+#include <linux/of_irq.h>
+#include <linux/irqchip/chained_irq.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+
+#include "pinctrl-samsung.h"
+
+#define NUM_EINT	24
+#define NUM_EINT_IRQ	6
+#define EINT_MAX_PER_GROUP	8
+
+#define EINTPEND_REG	0xa8
+#define EINTMASK_REG	0xa4
+
+#define EINT_GROUP(i)		((int)((i) / EINT_MAX_PER_GROUP))
+#define EINT_REG(i)		((EINT_GROUP(i) * 4) + 0x88)
+#define EINT_OFFS(i)		((i) % EINT_MAX_PER_GROUP * 4)
+
+#define EINT_LEVEL_LOW		0
+#define EINT_LEVEL_HIGH		1
+#define EINT_EDGE_FALLING	2
+#define EINT_EDGE_RISING	4
+#define EINT_EDGE_BOTH		6
+#define EINT_MASK		0xf
+
+static struct samsung_pin_bank_type bank_type_1bit = {
+	.fld_width = { 1, 1, },
+	.reg_offset = { 0x00, 0x04, },
+};
+
+static struct samsung_pin_bank_type bank_type_2bit = {
+	.fld_width = { 2, 1, 2, },
+	.reg_offset = { 0x00, 0x04, 0x08, },
+};
+
+#define PIN_BANK_A(pins, reg, id)		\
+	{						\
+		.type		= &bank_type_1bit,	\
+		.pctl_offset	= reg,			\
+		.nr_pins	= pins,			\
+		.eint_type	= EINT_TYPE_NONE,	\
+		.name		= id			\
+	}
+
+#define PIN_BANK_2BIT(pins, reg, id)		\
+	{						\
+		.type		= &bank_type_2bit,	\
+		.pctl_offset	= reg,			\
+		.nr_pins	= pins,			\
+		.eint_type	= EINT_TYPE_NONE,	\
+		.name		= id			\
+	}
+
+#define PIN_BANK_2BIT_EINTW(pins, reg, id, eoffs, emask)\
+	{						\
+		.type		= &bank_type_2bit,	\
+		.pctl_offset	= reg,			\
+		.nr_pins	= pins,			\
+		.eint_type	= EINT_TYPE_WKUP,	\
+		.eint_func	= 2,			\
+		.eint_mask	= emask,		\
+		.eint_offset	= eoffs,		\
+		.name		= id			\
+	}
+
+/**
+ * struct s3c24xx_eint_data: EINT common data
+ * @drvdata: pin controller driver data
+ * @domains: IRQ domains of particular EINT interrupts
+ * @parents: mapped parent irqs in the main interrupt controller
+ */
+struct s3c24xx_eint_data {
+	struct samsung_pinctrl_drv_data *drvdata;
+	struct irq_domain *domains[NUM_EINT];
+	int parents[NUM_EINT_IRQ];
+};
+
+/**
+ * struct s3c24xx_eint_domain_data: per irq-domain data
+ * @bank: pin bank related to the domain
+ * @eint_data: common data
+ * eint0_3_parent_only: live eints 0-3 only in the main intc
+ */
+struct s3c24xx_eint_domain_data {
+	struct samsung_pin_bank *bank;
+	struct s3c24xx_eint_data *eint_data;
+	bool eint0_3_parent_only;
+};
+
+static int s3c24xx_eint_get_trigger(unsigned int type)
+{
+	switch (type) {
+	case IRQ_TYPE_EDGE_RISING:
+		return EINT_EDGE_RISING;
+		break;
+	case IRQ_TYPE_EDGE_FALLING:
+		return EINT_EDGE_FALLING;
+		break;
+	case IRQ_TYPE_EDGE_BOTH:
+		return EINT_EDGE_BOTH;
+		break;
+	case IRQ_TYPE_LEVEL_HIGH:
+		return EINT_LEVEL_HIGH;
+		break;
+	case IRQ_TYPE_LEVEL_LOW:
+		return EINT_LEVEL_LOW;
+		break;
+	default:
+		return -EINVAL;
+	}
+}
+
+static void s3c24xx_eint_set_handler(unsigned int irq, unsigned int type)
+{
+	/* Edge- and level-triggered interrupts need different handlers */
+	if (type & IRQ_TYPE_EDGE_BOTH)
+		__irq_set_handler_locked(irq, handle_edge_irq);
+	else
+		__irq_set_handler_locked(irq, handle_level_irq);
+}
+
+static void s3c24xx_eint_set_function(struct samsung_pinctrl_drv_data *d,
+					struct samsung_pin_bank *bank, int pin)
+{
+	struct samsung_pin_bank_type *bank_type = bank->type;
+	unsigned long flags;
+	void __iomem *reg;
+	u8 shift;
+	u32 mask;
+	u32 val;
+
+	/* Make sure that pin is configured as interrupt */
+	reg = d->virt_base + bank->pctl_offset;
+	shift = pin * bank_type->fld_width[PINCFG_TYPE_FUNC];
+	mask = (1 << bank_type->fld_width[PINCFG_TYPE_FUNC]) - 1;
+
+	spin_lock_irqsave(&bank->slock, flags);
+
+	val = readl(reg);
+	val &= ~(mask << shift);
+	val |= bank->eint_func << shift;
+	writel(val, reg);
+
+	spin_unlock_irqrestore(&bank->slock, flags);
+}
+
+static int s3c24xx_eint_type(struct irq_data *data, unsigned int type)
+{
+	struct samsung_pin_bank *bank = irq_data_get_irq_chip_data(data);
+	struct samsung_pinctrl_drv_data *d = bank->drvdata;
+	int index = bank->eint_offset + data->hwirq;
+	void __iomem *reg;
+	int trigger;
+	u8 shift;
+	u32 val;
+
+	trigger = s3c24xx_eint_get_trigger(type);
+	if (trigger < 0) {
+		dev_err(d->dev, "unsupported external interrupt type\n");
+		return -EINVAL;
+	}
+
+	s3c24xx_eint_set_handler(data->irq, type);
+
+	/* Set up interrupt trigger */
+	reg = d->virt_base + EINT_REG(index);
+	shift = EINT_OFFS(index);
+
+	val = readl(reg);
+	val &= ~(EINT_MASK << shift);
+	val |= trigger << shift;
+	writel(val, reg);
+
+	s3c24xx_eint_set_function(d, bank, data->hwirq);
+
+	return 0;
+}
+
+/* Handling of EINTs 0-3 on all except S3C2412 and S3C2413 */
+
+static void s3c2410_eint0_3_ack(struct irq_data *data)
+{
+	struct samsung_pin_bank *bank = irq_data_get_irq_chip_data(data);
+	struct s3c24xx_eint_domain_data *ddata = bank->irq_domain->host_data;
+	struct s3c24xx_eint_data *eint_data = ddata->eint_data;
+	int parent_irq = eint_data->parents[data->hwirq];
+	struct irq_chip *parent_chip = irq_get_chip(parent_irq);
+
+	parent_chip->irq_ack(irq_get_irq_data(parent_irq));
+}
+
+static void s3c2410_eint0_3_mask(struct irq_data *data)
+{
+	struct samsung_pin_bank *bank = irq_data_get_irq_chip_data(data);
+	struct s3c24xx_eint_domain_data *ddata = bank->irq_domain->host_data;
+	struct s3c24xx_eint_data *eint_data = ddata->eint_data;
+	int parent_irq = eint_data->parents[data->hwirq];
+	struct irq_chip *parent_chip = irq_get_chip(parent_irq);
+
+	parent_chip->irq_mask(irq_get_irq_data(parent_irq));
+}
+
+static void s3c2410_eint0_3_unmask(struct irq_data *data)
+{
+	struct samsung_pin_bank *bank = irq_data_get_irq_chip_data(data);
+	struct s3c24xx_eint_domain_data *ddata = bank->irq_domain->host_data;
+	struct s3c24xx_eint_data *eint_data = ddata->eint_data;
+	int parent_irq = eint_data->parents[data->hwirq];
+	struct irq_chip *parent_chip = irq_get_chip(parent_irq);
+
+	parent_chip->irq_unmask(irq_get_irq_data(parent_irq));
+}
+
+static struct irq_chip s3c2410_eint0_3_chip = {
+	.name		= "s3c2410-eint0_3",
+	.irq_ack	= s3c2410_eint0_3_ack,
+	.irq_mask	= s3c2410_eint0_3_mask,
+	.irq_unmask	= s3c2410_eint0_3_unmask,
+	.irq_set_type	= s3c24xx_eint_type,
+};
+
+static void s3c2410_demux_eint0_3(unsigned int irq, struct irq_desc *desc)
+{
+	struct irq_data *data = irq_desc_get_irq_data(desc);
+	struct s3c24xx_eint_data *eint_data = irq_get_handler_data(irq);
+	unsigned int virq;
+
+	/* the first 4 eints have a simple 1 to 1 mapping */
+	virq = irq_linear_revmap(eint_data->domains[data->hwirq], data->hwirq);
+	/* Something must be really wrong if an unmapped EINT is unmasked */
+	BUG_ON(!virq);
+
+	generic_handle_irq(virq);
+}
+
+/* Handling of EINTs 0-3 on S3C2412 and S3C2413 */
+
+static void s3c2412_eint0_3_ack(struct irq_data *data)
+{
+	struct samsung_pin_bank *bank = irq_data_get_irq_chip_data(data);
+	struct samsung_pinctrl_drv_data *d = bank->drvdata;
+
+	unsigned long bitval = 1UL << data->hwirq;
+	writel(bitval, d->virt_base + EINTPEND_REG);
+}
+
+static void s3c2412_eint0_3_mask(struct irq_data *data)
+{
+	struct samsung_pin_bank *bank = irq_data_get_irq_chip_data(data);
+	struct samsung_pinctrl_drv_data *d = bank->drvdata;
+	unsigned long mask;
+
+	mask = readl(d->virt_base + EINTMASK_REG);
+	mask |= (1UL << data->hwirq);
+	writel(mask, d->virt_base + EINTMASK_REG);
+}
+
+static void s3c2412_eint0_3_unmask(struct irq_data *data)
+{
+	struct samsung_pin_bank *bank = irq_data_get_irq_chip_data(data);
+	struct samsung_pinctrl_drv_data *d = bank->drvdata;
+	unsigned long mask;
+
+	mask = readl(d->virt_base + EINTMASK_REG);
+	mask &= ~(1UL << data->hwirq);
+	writel(mask, d->virt_base + EINTMASK_REG);
+}
+
+static struct irq_chip s3c2412_eint0_3_chip = {
+	.name		= "s3c2412-eint0_3",
+	.irq_ack	= s3c2412_eint0_3_ack,
+	.irq_mask	= s3c2412_eint0_3_mask,
+	.irq_unmask	= s3c2412_eint0_3_unmask,
+	.irq_set_type	= s3c24xx_eint_type,
+};
+
+static void s3c2412_demux_eint0_3(unsigned int irq, struct irq_desc *desc)
+{
+	struct irq_chip *chip = irq_get_chip(irq);
+	struct irq_data *data = irq_desc_get_irq_data(desc);
+	struct s3c24xx_eint_data *eint_data = irq_get_handler_data(irq);
+	unsigned int virq;
+
+	chained_irq_enter(chip, desc);
+
+	/* the first 4 eints have a simple 1 to 1 mapping */
+	virq = irq_linear_revmap(eint_data->domains[data->hwirq], data->hwirq);
+	/* Something must be really wrong if an unmapped EINT is unmasked */
+	BUG_ON(!virq);
+
+	generic_handle_irq(virq);
+
+	chained_irq_exit(chip, desc);
+}
+
+/* Handling of all other eints */
+
+static void s3c24xx_eint_ack(struct irq_data *data)
+{
+	struct samsung_pin_bank *bank = irq_data_get_irq_chip_data(data);
+	struct samsung_pinctrl_drv_data *d = bank->drvdata;
+	unsigned char index = bank->eint_offset + data->hwirq;
+
+	writel(1UL << index, d->virt_base + EINTPEND_REG);
+}
+
+static void s3c24xx_eint_mask(struct irq_data *data)
+{
+	struct samsung_pin_bank *bank = irq_data_get_irq_chip_data(data);
+	struct samsung_pinctrl_drv_data *d = bank->drvdata;
+	unsigned char index = bank->eint_offset + data->hwirq;
+	unsigned long mask;
+
+	mask = readl(d->virt_base + EINTMASK_REG);
+	mask |= (1UL << index);
+	writel(mask, d->virt_base + EINTMASK_REG);
+}
+
+static void s3c24xx_eint_unmask(struct irq_data *data)
+{
+	struct samsung_pin_bank *bank = irq_data_get_irq_chip_data(data);
+	struct samsung_pinctrl_drv_data *d = bank->drvdata;
+	unsigned char index = bank->eint_offset + data->hwirq;
+	unsigned long mask;
+
+	mask = readl(d->virt_base + EINTMASK_REG);
+	mask &= ~(1UL << index);
+	writel(mask, d->virt_base + EINTMASK_REG);
+}
+
+static struct irq_chip s3c24xx_eint_chip = {
+	.name		= "s3c-eint",
+	.irq_ack	= s3c24xx_eint_ack,
+	.irq_mask	= s3c24xx_eint_mask,
+	.irq_unmask	= s3c24xx_eint_unmask,
+	.irq_set_type	= s3c24xx_eint_type,
+};
+
+static inline void s3c24xx_demux_eint(unsigned int irq, struct irq_desc *desc,
+				      u32 offset, u32 range)
+{
+	struct irq_chip *chip = irq_get_chip(irq);
+	struct s3c24xx_eint_data *data = irq_get_handler_data(irq);
+	struct samsung_pinctrl_drv_data *d = data->drvdata;
+	unsigned int pend, mask;
+
+	chained_irq_enter(chip, desc);
+
+	pend = readl(d->virt_base + EINTPEND_REG);
+	mask = readl(d->virt_base + EINTMASK_REG);
+
+	pend &= ~mask;
+	pend &= range;
+
+	while (pend) {
+		unsigned int virq;
+
+		irq = __ffs(pend);
+		pend &= ~(1 << irq);
+		virq = irq_linear_revmap(data->domains[irq], irq - offset);
+		/* Something is really wrong if an unmapped EINT is unmasked */
+		BUG_ON(!virq);
+
+		generic_handle_irq(virq);
+	}
+
+	chained_irq_exit(chip, desc);
+}
+
+static void s3c24xx_demux_eint4_7(unsigned int irq, struct irq_desc *desc)
+{
+	s3c24xx_demux_eint(irq, desc, 0, 0xf0);
+}
+
+static void s3c24xx_demux_eint8_23(unsigned int irq, struct irq_desc *desc)
+{
+	s3c24xx_demux_eint(irq, desc, 8, 0xffff00);
+}
+
+static irq_flow_handler_t s3c2410_eint_handlers[NUM_EINT_IRQ] = {
+	s3c2410_demux_eint0_3,
+	s3c2410_demux_eint0_3,
+	s3c2410_demux_eint0_3,
+	s3c2410_demux_eint0_3,
+	s3c24xx_demux_eint4_7,
+	s3c24xx_demux_eint8_23,
+};
+
+static irq_flow_handler_t s3c2412_eint_handlers[NUM_EINT_IRQ] = {
+	s3c2412_demux_eint0_3,
+	s3c2412_demux_eint0_3,
+	s3c2412_demux_eint0_3,
+	s3c2412_demux_eint0_3,
+	s3c24xx_demux_eint4_7,
+	s3c24xx_demux_eint8_23,
+};
+
+static int s3c24xx_gpf_irq_map(struct irq_domain *h, unsigned int virq,
+					irq_hw_number_t hw)
+{
+	struct s3c24xx_eint_domain_data *ddata = h->host_data;
+	struct samsung_pin_bank *bank = ddata->bank;
+
+	if (!(bank->eint_mask & (1 << (bank->eint_offset + hw))))
+		return -EINVAL;
+
+	if (hw <= 3) {
+		if (ddata->eint0_3_parent_only)
+			irq_set_chip_and_handler(virq, &s3c2410_eint0_3_chip,
+						 handle_edge_irq);
+		else
+			irq_set_chip_and_handler(virq, &s3c2412_eint0_3_chip,
+						 handle_edge_irq);
+	} else {
+		irq_set_chip_and_handler(virq, &s3c24xx_eint_chip,
+					 handle_edge_irq);
+	}
+	irq_set_chip_data(virq, bank);
+	set_irq_flags(virq, IRQF_VALID);
+	return 0;
+}
+
+static const struct irq_domain_ops s3c24xx_gpf_irq_ops = {
+	.map	= s3c24xx_gpf_irq_map,
+	.xlate	= irq_domain_xlate_twocell,
+};
+
+static int s3c24xx_gpg_irq_map(struct irq_domain *h, unsigned int virq,
+					irq_hw_number_t hw)
+{
+	struct s3c24xx_eint_domain_data *ddata = h->host_data;
+	struct samsung_pin_bank *bank = ddata->bank;
+
+	if (!(bank->eint_mask & (1 << (bank->eint_offset + hw))))
+		return -EINVAL;
+
+	irq_set_chip_and_handler(virq, &s3c24xx_eint_chip, handle_edge_irq);
+	irq_set_chip_data(virq, bank);
+	set_irq_flags(virq, IRQF_VALID);
+	return 0;
+}
+
+static const struct irq_domain_ops s3c24xx_gpg_irq_ops = {
+	.map	= s3c24xx_gpg_irq_map,
+	.xlate	= irq_domain_xlate_twocell,
+};
+
+static const struct of_device_id s3c24xx_eint_irq_ids[] = {
+	{ .compatible = "samsung,s3c2410-wakeup-eint", .data = (void *)1 },
+	{ .compatible = "samsung,s3c2412-wakeup-eint", .data = (void *)0 },
+	{ }
+};
+
+static int s3c24xx_eint_init(struct samsung_pinctrl_drv_data *d)
+{
+	struct device *dev = d->dev;
+	const struct of_device_id *match;
+	struct device_node *eint_np = NULL;
+	struct device_node *np;
+	struct samsung_pin_bank *bank;
+	struct s3c24xx_eint_data *eint_data;
+	const struct irq_domain_ops *ops;
+	unsigned int i;
+	bool eint0_3_parent_only;
+	irq_flow_handler_t *handlers;
+
+	for_each_child_of_node(dev->of_node, np) {
+		match = of_match_node(s3c24xx_eint_irq_ids, np);
+		if (match) {
+			eint_np = np;
+			eint0_3_parent_only = (bool)match->data;
+			break;
+		}
+	}
+	if (!eint_np)
+		return -ENODEV;
+
+	eint_data = devm_kzalloc(dev, sizeof(*eint_data), GFP_KERNEL);
+	if (!eint_data)
+		return -ENOMEM;
+
+	eint_data->drvdata = d;
+
+	handlers = eint0_3_parent_only ? s3c2410_eint_handlers
+				       : s3c2412_eint_handlers;
+	for (i = 0; i < NUM_EINT_IRQ; ++i) {
+		unsigned int irq;
+
+		irq = irq_of_parse_and_map(eint_np, i);
+		if (!irq) {
+			dev_err(dev, "failed to get wakeup EINT IRQ %d\n", i);
+			return -ENXIO;
+		}
+
+		eint_data->parents[i] = irq;
+		irq_set_chained_handler(irq, handlers[i]);
+		irq_set_handler_data(irq, eint_data);
+	}
+
+	bank = d->ctrl->pin_banks;
+	for (i = 0; i < d->ctrl->nr_banks; ++i, ++bank) {
+		struct s3c24xx_eint_domain_data *ddata;
+		unsigned int mask;
+		unsigned int irq;
+		unsigned int pin;
+
+		if (bank->eint_type != EINT_TYPE_WKUP)
+			continue;
+
+		ddata = devm_kzalloc(dev, sizeof(*ddata), GFP_KERNEL);
+		if (!ddata)
+			return -ENOMEM;
+
+		ddata->bank = bank;
+		ddata->eint_data = eint_data;
+		ddata->eint0_3_parent_only = eint0_3_parent_only;
+
+		ops = (bank->eint_offset == 0) ? &s3c24xx_gpf_irq_ops
+					       : &s3c24xx_gpg_irq_ops;
+
+		bank->irq_domain = irq_domain_add_linear(bank->of_node,
+				bank->nr_pins, ops, ddata);
+		if (!bank->irq_domain) {
+			dev_err(dev, "wkup irq domain add failed\n");
+			return -ENXIO;
+		}
+
+		irq = bank->eint_offset;
+		mask = bank->eint_mask;
+		for (pin = 0; mask; ++pin, mask >>= 1) {
+			if (irq >= NUM_EINT)
+				break;
+			if (!(mask & 1))
+				continue;
+			eint_data->domains[irq] = bank->irq_domain;
+			++irq;
+		}
+	}
+
+	return 0;
+}
+
+static struct samsung_pin_bank s3c2412_pin_banks[] = {
+	PIN_BANK_A(23, 0x000, "gpa"),
+	PIN_BANK_2BIT(11, 0x010, "gpb"),
+	PIN_BANK_2BIT(16, 0x020, "gpc"),
+	PIN_BANK_2BIT(16, 0x030, "gpd"),
+	PIN_BANK_2BIT(16, 0x040, "gpe"),
+	PIN_BANK_2BIT_EINTW(8, 0x050, "gpf", 0, 0xff),
+	PIN_BANK_2BIT_EINTW(16, 0x060, "gpg", 8, 0xffff00),
+	PIN_BANK_2BIT(11, 0x070, "gph"),
+	PIN_BANK_2BIT(13, 0x080, "gpj"),
+};
+
+struct samsung_pin_ctrl s3c2412_pin_ctrl[] = {
+	{
+		.pin_banks	= s3c2412_pin_banks,
+		.nr_banks	= ARRAY_SIZE(s3c2412_pin_banks),
+		.eint_wkup_init = s3c24xx_eint_init,
+		.label		= "S3C2412-GPIO",
+	},
+};
+
+static struct samsung_pin_bank s3c2416_pin_banks[] = {
+	PIN_BANK_A(27, 0x000, "gpa"),
+	PIN_BANK_2BIT(11, 0x010, "gpb"),
+	PIN_BANK_2BIT(16, 0x020, "gpc"),
+	PIN_BANK_2BIT(16, 0x030, "gpd"),
+	PIN_BANK_2BIT(16, 0x040, "gpe"),
+	PIN_BANK_2BIT_EINTW(8, 0x050, "gpf", 0, 0xff),
+	PIN_BANK_2BIT_EINTW(8, 0x060, "gpg", 8, 0xff00),
+	PIN_BANK_2BIT(15, 0x070, "gph"),
+	PIN_BANK_2BIT(16, 0x0e0, "gpk"),
+	PIN_BANK_2BIT(14, 0x0f0, "gpl"),
+	PIN_BANK_2BIT(2, 0x100, "gpm"),
+};
+
+struct samsung_pin_ctrl s3c2416_pin_ctrl[] = {
+	{
+		.pin_banks	= s3c2416_pin_banks,
+		.nr_banks	= ARRAY_SIZE(s3c2416_pin_banks),
+		.eint_wkup_init = s3c24xx_eint_init,
+		.label		= "S3C2416-GPIO",
+	},
+};
+
+static struct samsung_pin_bank s3c2440_pin_banks[] = {
+	PIN_BANK_A(25, 0x000, "gpa"),
+	PIN_BANK_2BIT(11, 0x010, "gpb"),
+	PIN_BANK_2BIT(16, 0x020, "gpc"),
+	PIN_BANK_2BIT(16, 0x030, "gpd"),
+	PIN_BANK_2BIT(16, 0x040, "gpe"),
+	PIN_BANK_2BIT_EINTW(8, 0x050, "gpf", 0, 0xff),
+	PIN_BANK_2BIT_EINTW(16, 0x060, "gpg", 8, 0xffff00),
+	PIN_BANK_2BIT(11, 0x070, "gph"),
+	PIN_BANK_2BIT(13, 0x0d0, "gpj"),
+};
+
+struct samsung_pin_ctrl s3c2440_pin_ctrl[] = {
+	{
+		.pin_banks	= s3c2440_pin_banks,
+		.nr_banks	= ARRAY_SIZE(s3c2440_pin_banks),
+		.eint_wkup_init = s3c24xx_eint_init,
+		.label		= "S3C2440-GPIO",
+	},
+};
+
+static struct samsung_pin_bank s3c2450_pin_banks[] = {
+	PIN_BANK_A(28, 0x000, "gpa"),
+	PIN_BANK_2BIT(11, 0x010, "gpb"),
+	PIN_BANK_2BIT(16, 0x020, "gpc"),
+	PIN_BANK_2BIT(16, 0x030, "gpd"),
+	PIN_BANK_2BIT(16, 0x040, "gpe"),
+	PIN_BANK_2BIT_EINTW(8, 0x050, "gpf", 0, 0xff),
+	PIN_BANK_2BIT_EINTW(16, 0x060, "gpg", 8, 0xffff00),
+	PIN_BANK_2BIT(15, 0x070, "gph"),
+	PIN_BANK_2BIT(16, 0x0d0, "gpj"),
+	PIN_BANK_2BIT(16, 0x0e0, "gpk"),
+	PIN_BANK_2BIT(15, 0x0f0, "gpl"),
+	PIN_BANK_2BIT(2, 0x100, "gpm"),
+};
+
+struct samsung_pin_ctrl s3c2450_pin_ctrl[] = {
+	{
+		.pin_banks	= s3c2450_pin_banks,
+		.nr_banks	= ARRAY_SIZE(s3c2450_pin_banks),
+		.eint_wkup_init = s3c24xx_eint_init,
+		.label		= "S3C2450-GPIO",
+	},
+};
diff --git a/drivers/pinctrl/samsung/pinctrl-s3c64xx.c b/drivers/pinctrl/samsung/pinctrl-s3c64xx.c
new file mode 100644
index 0000000..89143c9
--- /dev/null
+++ b/drivers/pinctrl/samsung/pinctrl-s3c64xx.c
@@ -0,0 +1,816 @@
+/*
+ * S3C64xx specific support for pinctrl-samsung driver.
+ *
+ * Copyright (c) 2013 Tomasz Figa <tomasz.figa@gmail.com>
+ *
+ * Based on pinctrl-exynos.c, please see the file for original copyrights.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This file contains the Samsung S3C64xx specific information required by the
+ * the Samsung pinctrl/gpiolib driver. It also includes the implementation of
+ * external gpio and wakeup interrupt support.
+ */
+
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/interrupt.h>
+#include <linux/irqdomain.h>
+#include <linux/irq.h>
+#include <linux/of_irq.h>
+#include <linux/io.h>
+#include <linux/irqchip/chained_irq.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+
+#include "pinctrl-samsung.h"
+
+#define NUM_EINT0		28
+#define NUM_EINT0_IRQ		4
+#define EINT_MAX_PER_REG	16
+#define EINT_MAX_PER_GROUP	16
+
+/* External GPIO and wakeup interrupt related definitions */
+#define SVC_GROUP_SHIFT		4
+#define SVC_GROUP_MASK		0xf
+#define SVC_NUM_MASK		0xf
+#define SVC_GROUP(x)		((x >> SVC_GROUP_SHIFT) & \
+						SVC_GROUP_MASK)
+
+#define EINT12CON_REG		0x200
+#define EINT12MASK_REG		0x240
+#define EINT12PEND_REG		0x260
+
+#define EINT_OFFS(i)		((i) % (2 * EINT_MAX_PER_GROUP))
+#define EINT_GROUP(i)		((i) / EINT_MAX_PER_GROUP)
+#define EINT_REG(g)		(4 * ((g) / 2))
+
+#define EINTCON_REG(i)		(EINT12CON_REG + EINT_REG(EINT_GROUP(i)))
+#define EINTMASK_REG(i)		(EINT12MASK_REG + EINT_REG(EINT_GROUP(i)))
+#define EINTPEND_REG(i)		(EINT12PEND_REG + EINT_REG(EINT_GROUP(i)))
+
+#define SERVICE_REG		0x284
+#define SERVICEPEND_REG		0x288
+
+#define EINT0CON0_REG		0x900
+#define EINT0MASK_REG		0x920
+#define EINT0PEND_REG		0x924
+
+/* S3C64xx specific external interrupt trigger types */
+#define EINT_LEVEL_LOW		0
+#define EINT_LEVEL_HIGH		1
+#define EINT_EDGE_FALLING	2
+#define EINT_EDGE_RISING	4
+#define EINT_EDGE_BOTH		6
+#define EINT_CON_MASK		0xF
+#define EINT_CON_LEN		4
+
+static struct samsung_pin_bank_type bank_type_4bit_off = {
+	.fld_width = { 4, 1, 2, 0, 2, 2, },
+	.reg_offset = { 0x00, 0x04, 0x08, 0, 0x0c, 0x10, },
+};
+
+static struct samsung_pin_bank_type bank_type_4bit_alive = {
+	.fld_width = { 4, 1, 2, },
+	.reg_offset = { 0x00, 0x04, 0x08, },
+};
+
+static struct samsung_pin_bank_type bank_type_4bit2_off = {
+	.fld_width = { 4, 1, 2, 0, 2, 2, },
+	.reg_offset = { 0x00, 0x08, 0x0c, 0, 0x10, 0x14, },
+};
+
+static struct samsung_pin_bank_type bank_type_4bit2_alive = {
+	.fld_width = { 4, 1, 2, },
+	.reg_offset = { 0x00, 0x08, 0x0c, },
+};
+
+static struct samsung_pin_bank_type bank_type_2bit_off = {
+	.fld_width = { 2, 1, 2, 0, 2, 2, },
+	.reg_offset = { 0x00, 0x04, 0x08, 0, 0x0c, 0x10, },
+};
+
+static struct samsung_pin_bank_type bank_type_2bit_alive = {
+	.fld_width = { 2, 1, 2, },
+	.reg_offset = { 0x00, 0x04, 0x08, },
+};
+
+#define PIN_BANK_4BIT(pins, reg, id)			\
+	{						\
+		.type		= &bank_type_4bit_off,	\
+		.pctl_offset	= reg,			\
+		.nr_pins	= pins,			\
+		.eint_type	= EINT_TYPE_NONE,	\
+		.name		= id			\
+	}
+
+#define PIN_BANK_4BIT_EINTG(pins, reg, id, eoffs)	\
+	{						\
+		.type		= &bank_type_4bit_off,	\
+		.pctl_offset	= reg,			\
+		.nr_pins	= pins,			\
+		.eint_type	= EINT_TYPE_GPIO,	\
+		.eint_func	= 7,			\
+		.eint_mask	= (1 << (pins)) - 1,	\
+		.eint_offset	= eoffs,		\
+		.name		= id			\
+	}
+
+#define PIN_BANK_4BIT_EINTW(pins, reg, id, eoffs, emask) \
+	{						\
+		.type		= &bank_type_4bit_alive,\
+		.pctl_offset	= reg,			\
+		.nr_pins	= pins,			\
+		.eint_type	= EINT_TYPE_WKUP,	\
+		.eint_func	= 3,			\
+		.eint_mask	= emask,		\
+		.eint_offset	= eoffs,		\
+		.name		= id			\
+	}
+
+#define PIN_BANK_4BIT2_EINTG(pins, reg, id, eoffs)	\
+	{						\
+		.type		= &bank_type_4bit2_off,	\
+		.pctl_offset	= reg,			\
+		.nr_pins	= pins,			\
+		.eint_type	= EINT_TYPE_GPIO,	\
+		.eint_func	= 7,			\
+		.eint_mask	= (1 << (pins)) - 1,	\
+		.eint_offset	= eoffs,		\
+		.name		= id			\
+	}
+
+#define PIN_BANK_4BIT2_EINTW(pins, reg, id, eoffs, emask) \
+	{						\
+		.type		= &bank_type_4bit2_alive,\
+		.pctl_offset	= reg,			\
+		.nr_pins	= pins,			\
+		.eint_type	= EINT_TYPE_WKUP,	\
+		.eint_func	= 3,			\
+		.eint_mask	= emask,		\
+		.eint_offset	= eoffs,		\
+		.name		= id			\
+	}
+
+#define PIN_BANK_4BIT2_ALIVE(pins, reg, id)		\
+	{						\
+		.type		= &bank_type_4bit2_alive,\
+		.pctl_offset	= reg,			\
+		.nr_pins	= pins,			\
+		.eint_type	= EINT_TYPE_NONE,	\
+		.name		= id			\
+	}
+
+#define PIN_BANK_2BIT(pins, reg, id)			\
+	{						\
+		.type		= &bank_type_2bit_off,	\
+		.pctl_offset	= reg,			\
+		.nr_pins	= pins,			\
+		.eint_type	= EINT_TYPE_NONE,	\
+		.name		= id			\
+	}
+
+#define PIN_BANK_2BIT_EINTG(pins, reg, id, eoffs, emask) \
+	{						\
+		.type		= &bank_type_2bit_off,	\
+		.pctl_offset	= reg,			\
+		.nr_pins	= pins,			\
+		.eint_type	= EINT_TYPE_GPIO,	\
+		.eint_func	= 3,			\
+		.eint_mask	= emask,		\
+		.eint_offset	= eoffs,		\
+		.name		= id			\
+	}
+
+#define PIN_BANK_2BIT_EINTW(pins, reg, id, eoffs)	\
+	{						\
+		.type		= &bank_type_2bit_alive,\
+		.pctl_offset	= reg,			\
+		.nr_pins	= pins,			\
+		.eint_type	= EINT_TYPE_WKUP,	\
+		.eint_func	= 2,			\
+		.eint_mask	= (1 << (pins)) - 1,	\
+		.eint_offset	= eoffs,		\
+		.name		= id			\
+	}
+
+/**
+ * struct s3c64xx_eint0_data: EINT0 common data
+ * @drvdata: pin controller driver data
+ * @domains: IRQ domains of particular EINT0 interrupts
+ * @pins: pin offsets inside of banks of particular EINT0 interrupts
+ */
+struct s3c64xx_eint0_data {
+	struct samsung_pinctrl_drv_data *drvdata;
+	struct irq_domain *domains[NUM_EINT0];
+	u8 pins[NUM_EINT0];
+};
+
+/**
+ * struct s3c64xx_eint0_domain_data: EINT0 per-domain data
+ * @bank: pin bank related to the domain
+ * @eints: EINT0 interrupts related to the domain
+ */
+struct s3c64xx_eint0_domain_data {
+	struct samsung_pin_bank *bank;
+	u8 eints[];
+};
+
+/**
+ * struct s3c64xx_eint_gpio_data: GPIO EINT data
+ * @drvdata: pin controller driver data
+ * @domains: array of domains related to EINT interrupt groups
+ */
+struct s3c64xx_eint_gpio_data {
+	struct samsung_pinctrl_drv_data *drvdata;
+	struct irq_domain *domains[];
+};
+
+/*
+ * Common functions for S3C64xx EINT configuration
+ */
+
+static int s3c64xx_irq_get_trigger(unsigned int type)
+{
+	int trigger;
+
+	switch (type) {
+	case IRQ_TYPE_EDGE_RISING:
+		trigger = EINT_EDGE_RISING;
+		break;
+	case IRQ_TYPE_EDGE_FALLING:
+		trigger = EINT_EDGE_FALLING;
+		break;
+	case IRQ_TYPE_EDGE_BOTH:
+		trigger = EINT_EDGE_BOTH;
+		break;
+	case IRQ_TYPE_LEVEL_HIGH:
+		trigger = EINT_LEVEL_HIGH;
+		break;
+	case IRQ_TYPE_LEVEL_LOW:
+		trigger = EINT_LEVEL_LOW;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return trigger;
+}
+
+static void s3c64xx_irq_set_handler(unsigned int irq, unsigned int type)
+{
+	/* Edge- and level-triggered interrupts need different handlers */
+	if (type & IRQ_TYPE_EDGE_BOTH)
+		__irq_set_handler_locked(irq, handle_edge_irq);
+	else
+		__irq_set_handler_locked(irq, handle_level_irq);
+}
+
+static void s3c64xx_irq_set_function(struct samsung_pinctrl_drv_data *d,
+					struct samsung_pin_bank *bank, int pin)
+{
+	struct samsung_pin_bank_type *bank_type = bank->type;
+	unsigned long flags;
+	void __iomem *reg;
+	u8 shift;
+	u32 mask;
+	u32 val;
+
+	/* Make sure that pin is configured as interrupt */
+	reg = d->virt_base + bank->pctl_offset;
+	shift = pin;
+	if (bank_type->fld_width[PINCFG_TYPE_FUNC] * shift >= 32) {
+		/* 4-bit bank type with 2 con regs */
+		reg += 4;
+		shift -= 8;
+	}
+
+	shift = shift * bank_type->fld_width[PINCFG_TYPE_FUNC];
+	mask = (1 << bank_type->fld_width[PINCFG_TYPE_FUNC]) - 1;
+
+	spin_lock_irqsave(&bank->slock, flags);
+
+	val = readl(reg);
+	val &= ~(mask << shift);
+	val |= bank->eint_func << shift;
+	writel(val, reg);
+
+	spin_unlock_irqrestore(&bank->slock, flags);
+}
+
+/*
+ * Functions for EINT GPIO configuration (EINT groups 1-9)
+ */
+
+static inline void s3c64xx_gpio_irq_set_mask(struct irq_data *irqd, bool mask)
+{
+	struct samsung_pin_bank *bank = irq_data_get_irq_chip_data(irqd);
+	struct samsung_pinctrl_drv_data *d = bank->drvdata;
+	unsigned char index = EINT_OFFS(bank->eint_offset) + irqd->hwirq;
+	void __iomem *reg = d->virt_base + EINTMASK_REG(bank->eint_offset);
+	u32 val;
+
+	val = readl(reg);
+	if (mask)
+		val |= 1 << index;
+	else
+		val &= ~(1 << index);
+	writel(val, reg);
+}
+
+static void s3c64xx_gpio_irq_unmask(struct irq_data *irqd)
+{
+	s3c64xx_gpio_irq_set_mask(irqd, false);
+}
+
+static void s3c64xx_gpio_irq_mask(struct irq_data *irqd)
+{
+	s3c64xx_gpio_irq_set_mask(irqd, true);
+}
+
+static void s3c64xx_gpio_irq_ack(struct irq_data *irqd)
+{
+	struct samsung_pin_bank *bank = irq_data_get_irq_chip_data(irqd);
+	struct samsung_pinctrl_drv_data *d = bank->drvdata;
+	unsigned char index = EINT_OFFS(bank->eint_offset) + irqd->hwirq;
+	void __iomem *reg = d->virt_base + EINTPEND_REG(bank->eint_offset);
+
+	writel(1 << index, reg);
+}
+
+static int s3c64xx_gpio_irq_set_type(struct irq_data *irqd, unsigned int type)
+{
+	struct samsung_pin_bank *bank = irq_data_get_irq_chip_data(irqd);
+	struct samsung_pinctrl_drv_data *d = bank->drvdata;
+	void __iomem *reg;
+	int trigger;
+	u8 shift;
+	u32 val;
+
+	trigger = s3c64xx_irq_get_trigger(type);
+	if (trigger < 0) {
+		pr_err("unsupported external interrupt type\n");
+		return -EINVAL;
+	}
+
+	s3c64xx_irq_set_handler(irqd->irq, type);
+
+	/* Set up interrupt trigger */
+	reg = d->virt_base + EINTCON_REG(bank->eint_offset);
+	shift = EINT_OFFS(bank->eint_offset) + irqd->hwirq;
+	shift = 4 * (shift / 4); /* 4 EINTs per trigger selector */
+
+	val = readl(reg);
+	val &= ~(EINT_CON_MASK << shift);
+	val |= trigger << shift;
+	writel(val, reg);
+
+	s3c64xx_irq_set_function(d, bank, irqd->hwirq);
+
+	return 0;
+}
+
+/*
+ * irq_chip for gpio interrupts.
+ */
+static struct irq_chip s3c64xx_gpio_irq_chip = {
+	.name		= "GPIO",
+	.irq_unmask	= s3c64xx_gpio_irq_unmask,
+	.irq_mask	= s3c64xx_gpio_irq_mask,
+	.irq_ack	= s3c64xx_gpio_irq_ack,
+	.irq_set_type	= s3c64xx_gpio_irq_set_type,
+};
+
+static int s3c64xx_gpio_irq_map(struct irq_domain *h, unsigned int virq,
+					irq_hw_number_t hw)
+{
+	struct samsung_pin_bank *bank = h->host_data;
+
+	if (!(bank->eint_mask & (1 << hw)))
+		return -EINVAL;
+
+	irq_set_chip_and_handler(virq,
+				&s3c64xx_gpio_irq_chip, handle_level_irq);
+	irq_set_chip_data(virq, bank);
+	set_irq_flags(virq, IRQF_VALID);
+
+	return 0;
+}
+
+/*
+ * irq domain callbacks for external gpio interrupt controller.
+ */
+static const struct irq_domain_ops s3c64xx_gpio_irqd_ops = {
+	.map	= s3c64xx_gpio_irq_map,
+	.xlate	= irq_domain_xlate_twocell,
+};
+
+static void s3c64xx_eint_gpio_irq(unsigned int irq, struct irq_desc *desc)
+{
+	struct irq_chip *chip = irq_get_chip(irq);
+	struct s3c64xx_eint_gpio_data *data = irq_get_handler_data(irq);
+	struct samsung_pinctrl_drv_data *drvdata = data->drvdata;
+
+	chained_irq_enter(chip, desc);
+
+	do {
+		unsigned int svc;
+		unsigned int group;
+		unsigned int pin;
+		unsigned int virq;
+
+		svc = readl(drvdata->virt_base + SERVICE_REG);
+		group = SVC_GROUP(svc);
+		pin = svc & SVC_NUM_MASK;
+
+		if (!group)
+			break;
+
+		/* Group 1 is used for two pin banks */
+		if (group == 1) {
+			if (pin < 8)
+				group = 0;
+			else
+				pin -= 8;
+		}
+
+		virq = irq_linear_revmap(data->domains[group], pin);
+		/*
+		 * Something must be really wrong if an unmapped EINT
+		 * was unmasked...
+		 */
+		BUG_ON(!virq);
+
+		generic_handle_irq(virq);
+	} while (1);
+
+	chained_irq_exit(chip, desc);
+}
+
+/**
+ * s3c64xx_eint_gpio_init() - setup handling of external gpio interrupts.
+ * @d: driver data of samsung pinctrl driver.
+ */
+static int s3c64xx_eint_gpio_init(struct samsung_pinctrl_drv_data *d)
+{
+	struct s3c64xx_eint_gpio_data *data;
+	struct samsung_pin_bank *bank;
+	struct device *dev = d->dev;
+	unsigned int nr_domains;
+	unsigned int i;
+
+	if (!d->irq) {
+		dev_err(dev, "irq number not available\n");
+		return -EINVAL;
+	}
+
+	nr_domains = 0;
+	bank = d->ctrl->pin_banks;
+	for (i = 0; i < d->ctrl->nr_banks; ++i, ++bank) {
+		unsigned int nr_eints;
+		unsigned int mask;
+
+		if (bank->eint_type != EINT_TYPE_GPIO)
+			continue;
+
+		mask = bank->eint_mask;
+		nr_eints = fls(mask);
+
+		bank->irq_domain = irq_domain_add_linear(bank->of_node,
+					nr_eints, &s3c64xx_gpio_irqd_ops, bank);
+		if (!bank->irq_domain) {
+			dev_err(dev, "gpio irq domain add failed\n");
+			return -ENXIO;
+		}
+
+		++nr_domains;
+	}
+
+	data = devm_kzalloc(dev, sizeof(*data)
+			+ nr_domains * sizeof(*data->domains), GFP_KERNEL);
+	if (!data) {
+		dev_err(dev, "failed to allocate handler data\n");
+		return -ENOMEM;
+	}
+	data->drvdata = d;
+
+	bank = d->ctrl->pin_banks;
+	nr_domains = 0;
+	for (i = 0; i < d->ctrl->nr_banks; ++i, ++bank) {
+		if (bank->eint_type != EINT_TYPE_GPIO)
+			continue;
+
+		data->domains[nr_domains++] = bank->irq_domain;
+	}
+
+	irq_set_chained_handler(d->irq, s3c64xx_eint_gpio_irq);
+	irq_set_handler_data(d->irq, data);
+
+	return 0;
+}
+
+/*
+ * Functions for configuration of EINT0 wake-up interrupts
+ */
+
+static inline void s3c64xx_eint0_irq_set_mask(struct irq_data *irqd, bool mask)
+{
+	struct s3c64xx_eint0_domain_data *ddata =
+					irq_data_get_irq_chip_data(irqd);
+	struct samsung_pinctrl_drv_data *d = ddata->bank->drvdata;
+	u32 val;
+
+	val = readl(d->virt_base + EINT0MASK_REG);
+	if (mask)
+		val |= 1 << ddata->eints[irqd->hwirq];
+	else
+		val &= ~(1 << ddata->eints[irqd->hwirq]);
+	writel(val, d->virt_base + EINT0MASK_REG);
+}
+
+static void s3c64xx_eint0_irq_unmask(struct irq_data *irqd)
+{
+	s3c64xx_eint0_irq_set_mask(irqd, false);
+}
+
+static void s3c64xx_eint0_irq_mask(struct irq_data *irqd)
+{
+	s3c64xx_eint0_irq_set_mask(irqd, true);
+}
+
+static void s3c64xx_eint0_irq_ack(struct irq_data *irqd)
+{
+	struct s3c64xx_eint0_domain_data *ddata =
+					irq_data_get_irq_chip_data(irqd);
+	struct samsung_pinctrl_drv_data *d = ddata->bank->drvdata;
+
+	writel(1 << ddata->eints[irqd->hwirq],
+					d->virt_base + EINT0PEND_REG);
+}
+
+static int s3c64xx_eint0_irq_set_type(struct irq_data *irqd, unsigned int type)
+{
+	struct s3c64xx_eint0_domain_data *ddata =
+					irq_data_get_irq_chip_data(irqd);
+	struct samsung_pin_bank *bank = ddata->bank;
+	struct samsung_pinctrl_drv_data *d = bank->drvdata;
+	void __iomem *reg;
+	int trigger;
+	u8 shift;
+	u32 val;
+
+	trigger = s3c64xx_irq_get_trigger(type);
+	if (trigger < 0) {
+		pr_err("unsupported external interrupt type\n");
+		return -EINVAL;
+	}
+
+	s3c64xx_irq_set_handler(irqd->irq, type);
+
+	/* Set up interrupt trigger */
+	reg = d->virt_base + EINT0CON0_REG;
+	shift = ddata->eints[irqd->hwirq];
+	if (shift >= EINT_MAX_PER_REG) {
+		reg += 4;
+		shift -= EINT_MAX_PER_REG;
+	}
+	shift = EINT_CON_LEN * (shift / 2);
+
+	val = readl(reg);
+	val &= ~(EINT_CON_MASK << shift);
+	val |= trigger << shift;
+	writel(val, reg);
+
+	s3c64xx_irq_set_function(d, bank, irqd->hwirq);
+
+	return 0;
+}
+
+/*
+ * irq_chip for wakeup interrupts
+ */
+static struct irq_chip s3c64xx_eint0_irq_chip = {
+	.name		= "EINT0",
+	.irq_unmask	= s3c64xx_eint0_irq_unmask,
+	.irq_mask	= s3c64xx_eint0_irq_mask,
+	.irq_ack	= s3c64xx_eint0_irq_ack,
+	.irq_set_type	= s3c64xx_eint0_irq_set_type,
+};
+
+static inline void s3c64xx_irq_demux_eint(unsigned int irq,
+					struct irq_desc *desc, u32 range)
+{
+	struct irq_chip *chip = irq_get_chip(irq);
+	struct s3c64xx_eint0_data *data = irq_get_handler_data(irq);
+	struct samsung_pinctrl_drv_data *drvdata = data->drvdata;
+	unsigned int pend, mask;
+
+	chained_irq_enter(chip, desc);
+
+	pend = readl(drvdata->virt_base + EINT0PEND_REG);
+	mask = readl(drvdata->virt_base + EINT0MASK_REG);
+
+	pend = pend & range & ~mask;
+	pend &= range;
+
+	while (pend) {
+		unsigned int virq;
+
+		irq = fls(pend) - 1;
+		pend &= ~(1 << irq);
+
+		virq = irq_linear_revmap(data->domains[irq], data->pins[irq]);
+		/*
+		 * Something must be really wrong if an unmapped EINT
+		 * was unmasked...
+		 */
+		BUG_ON(!virq);
+
+		generic_handle_irq(virq);
+	}
+
+	chained_irq_exit(chip, desc);
+}
+
+static void s3c64xx_demux_eint0_3(unsigned int irq, struct irq_desc *desc)
+{
+	s3c64xx_irq_demux_eint(irq, desc, 0xf);
+}
+
+static void s3c64xx_demux_eint4_11(unsigned int irq, struct irq_desc *desc)
+{
+	s3c64xx_irq_demux_eint(irq, desc, 0xff0);
+}
+
+static void s3c64xx_demux_eint12_19(unsigned int irq, struct irq_desc *desc)
+{
+	s3c64xx_irq_demux_eint(irq, desc, 0xff000);
+}
+
+static void s3c64xx_demux_eint20_27(unsigned int irq, struct irq_desc *desc)
+{
+	s3c64xx_irq_demux_eint(irq, desc, 0xff00000);
+}
+
+static irq_flow_handler_t s3c64xx_eint0_handlers[NUM_EINT0_IRQ] = {
+	s3c64xx_demux_eint0_3,
+	s3c64xx_demux_eint4_11,
+	s3c64xx_demux_eint12_19,
+	s3c64xx_demux_eint20_27,
+};
+
+static int s3c64xx_eint0_irq_map(struct irq_domain *h, unsigned int virq,
+					irq_hw_number_t hw)
+{
+	struct s3c64xx_eint0_domain_data *ddata = h->host_data;
+	struct samsung_pin_bank *bank = ddata->bank;
+
+	if (!(bank->eint_mask & (1 << hw)))
+		return -EINVAL;
+
+	irq_set_chip_and_handler(virq,
+				&s3c64xx_eint0_irq_chip, handle_level_irq);
+	irq_set_chip_data(virq, ddata);
+	set_irq_flags(virq, IRQF_VALID);
+
+	return 0;
+}
+
+/*
+ * irq domain callbacks for external wakeup interrupt controller.
+ */
+static const struct irq_domain_ops s3c64xx_eint0_irqd_ops = {
+	.map	= s3c64xx_eint0_irq_map,
+	.xlate	= irq_domain_xlate_twocell,
+};
+
+/* list of external wakeup controllers supported */
+static const struct of_device_id s3c64xx_eint0_irq_ids[] = {
+	{ .compatible = "samsung,s3c64xx-wakeup-eint", },
+	{ }
+};
+
+/**
+ * s3c64xx_eint_eint0_init() - setup handling of external wakeup interrupts.
+ * @d: driver data of samsung pinctrl driver.
+ */
+static int s3c64xx_eint_eint0_init(struct samsung_pinctrl_drv_data *d)
+{
+	struct device *dev = d->dev;
+	struct device_node *eint0_np = NULL;
+	struct device_node *np;
+	struct samsung_pin_bank *bank;
+	struct s3c64xx_eint0_data *data;
+	unsigned int i;
+
+	for_each_child_of_node(dev->of_node, np) {
+		if (of_match_node(s3c64xx_eint0_irq_ids, np)) {
+			eint0_np = np;
+			break;
+		}
+	}
+	if (!eint0_np)
+		return -ENODEV;
+
+	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
+	if (!data) {
+		dev_err(dev, "could not allocate memory for wkup eint data\n");
+		return -ENOMEM;
+	}
+	data->drvdata = d;
+
+	for (i = 0; i < NUM_EINT0_IRQ; ++i) {
+		unsigned int irq;
+
+		irq = irq_of_parse_and_map(eint0_np, i);
+		if (!irq) {
+			dev_err(dev, "failed to get wakeup EINT IRQ %d\n", i);
+			return -ENXIO;
+		}
+
+		irq_set_chained_handler(irq, s3c64xx_eint0_handlers[i]);
+		irq_set_handler_data(irq, data);
+	}
+
+	bank = d->ctrl->pin_banks;
+	for (i = 0; i < d->ctrl->nr_banks; ++i, ++bank) {
+		struct s3c64xx_eint0_domain_data *ddata;
+		unsigned int nr_eints;
+		unsigned int mask;
+		unsigned int irq;
+		unsigned int pin;
+
+		if (bank->eint_type != EINT_TYPE_WKUP)
+			continue;
+
+		mask = bank->eint_mask;
+		nr_eints = fls(mask);
+
+		ddata = devm_kzalloc(dev,
+				sizeof(*ddata) + nr_eints, GFP_KERNEL);
+		if (!ddata) {
+			dev_err(dev, "failed to allocate domain data\n");
+			return -ENOMEM;
+		}
+		ddata->bank = bank;
+
+		bank->irq_domain = irq_domain_add_linear(bank->of_node,
+				nr_eints, &s3c64xx_eint0_irqd_ops, ddata);
+		if (!bank->irq_domain) {
+			dev_err(dev, "wkup irq domain add failed\n");
+			return -ENXIO;
+		}
+
+		irq = bank->eint_offset;
+		mask = bank->eint_mask;
+		for (pin = 0; mask; ++pin, mask >>= 1) {
+			if (!(mask & 1))
+				continue;
+			data->domains[irq] = bank->irq_domain;
+			data->pins[irq] = pin;
+			ddata->eints[pin] = irq;
+			++irq;
+		}
+	}
+
+	return 0;
+}
+
+/* pin banks of s3c64xx pin-controller 0 */
+static struct samsung_pin_bank s3c64xx_pin_banks0[] = {
+	PIN_BANK_4BIT_EINTG(8, 0x000, "gpa", 0),
+	PIN_BANK_4BIT_EINTG(7, 0x020, "gpb", 8),
+	PIN_BANK_4BIT_EINTG(8, 0x040, "gpc", 16),
+	PIN_BANK_4BIT_EINTG(5, 0x060, "gpd", 32),
+	PIN_BANK_4BIT(5, 0x080, "gpe"),
+	PIN_BANK_2BIT_EINTG(16, 0x0a0, "gpf", 48, 0x3fff),
+	PIN_BANK_4BIT_EINTG(7, 0x0c0, "gpg", 64),
+	PIN_BANK_4BIT2_EINTG(10, 0x0e0, "gph", 80),
+	PIN_BANK_2BIT(16, 0x100, "gpi"),
+	PIN_BANK_2BIT(12, 0x120, "gpj"),
+	PIN_BANK_4BIT2_ALIVE(16, 0x800, "gpk"),
+	PIN_BANK_4BIT2_EINTW(15, 0x810, "gpl", 16, 0x7f00),
+	PIN_BANK_4BIT_EINTW(6, 0x820, "gpm", 23, 0x1f),
+	PIN_BANK_2BIT_EINTW(16, 0x830, "gpn", 0),
+	PIN_BANK_2BIT_EINTG(16, 0x140, "gpo", 96, 0xffff),
+	PIN_BANK_2BIT_EINTG(15, 0x160, "gpp", 112, 0x7fff),
+	PIN_BANK_2BIT_EINTG(9, 0x180, "gpq", 128, 0x1ff),
+};
+
+/*
+ * Samsung pinctrl driver data for S3C64xx SoC. S3C64xx SoC includes
+ * one gpio/pin-mux/pinconfig controller.
+ */
+struct samsung_pin_ctrl s3c64xx_pin_ctrl[] = {
+	{
+		/* pin-controller instance 1 data */
+		.pin_banks	= s3c64xx_pin_banks0,
+		.nr_banks	= ARRAY_SIZE(s3c64xx_pin_banks0),
+		.eint_gpio_init = s3c64xx_eint_gpio_init,
+		.eint_wkup_init = s3c64xx_eint_eint0_init,
+		.label		= "S3C64xx-GPIO",
+	},
+};
diff --git a/drivers/pinctrl/samsung/pinctrl-samsung.c b/drivers/pinctrl/samsung/pinctrl-samsung.c
new file mode 100644
index 0000000..b07406d
--- /dev/null
+++ b/drivers/pinctrl/samsung/pinctrl-samsung.c
@@ -0,0 +1,1285 @@
+/*
+ * pin-controller/pin-mux/pin-config/gpio-driver for Samsung's SoC's.
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com
+ * Copyright (c) 2012 Linaro Ltd
+ *		http://www.linaro.org
+ *
+ * Author: Thomas Abraham <thomas.ab@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This driver implements the Samsung pinctrl driver. It supports setting up of
+ * pinmux and pinconf configurations. The gpiolib interface is also included.
+ * External interrupt (gpio and wakeup) support are not included in this driver
+ * but provides extensions to which platform specific implementation of the gpio
+ * and wakeup interrupts can be hooked to.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/gpio.h>
+#include <linux/irqdomain.h>
+#include <linux/spinlock.h>
+#include <linux/syscore_ops.h>
+
+#include "../core.h"
+#include "pinctrl-samsung.h"
+
+#define GROUP_SUFFIX		"-grp"
+#define GSUFFIX_LEN		sizeof(GROUP_SUFFIX)
+#define FUNCTION_SUFFIX		"-mux"
+#define FSUFFIX_LEN		sizeof(FUNCTION_SUFFIX)
+
+/* list of all possible config options supported */
+static struct pin_config {
+	const char *property;
+	enum pincfg_type param;
+} cfg_params[] = {
+	{ "samsung,pin-pud", PINCFG_TYPE_PUD },
+	{ "samsung,pin-drv", PINCFG_TYPE_DRV },
+	{ "samsung,pin-con-pdn", PINCFG_TYPE_CON_PDN },
+	{ "samsung,pin-pud-pdn", PINCFG_TYPE_PUD_PDN },
+	{ "samsung,pin-val", PINCFG_TYPE_DAT },
+};
+
+/* Global list of devices (struct samsung_pinctrl_drv_data) */
+static LIST_HEAD(drvdata_list);
+
+static unsigned int pin_base;
+
+static inline struct samsung_pin_bank *gc_to_pin_bank(struct gpio_chip *gc)
+{
+	return container_of(gc, struct samsung_pin_bank, gpio_chip);
+}
+
+static int samsung_get_group_count(struct pinctrl_dev *pctldev)
+{
+	struct samsung_pinctrl_drv_data *pmx = pinctrl_dev_get_drvdata(pctldev);
+
+	return pmx->nr_groups;
+}
+
+static const char *samsung_get_group_name(struct pinctrl_dev *pctldev,
+						unsigned group)
+{
+	struct samsung_pinctrl_drv_data *pmx = pinctrl_dev_get_drvdata(pctldev);
+
+	return pmx->pin_groups[group].name;
+}
+
+static int samsung_get_group_pins(struct pinctrl_dev *pctldev,
+					unsigned group,
+					const unsigned **pins,
+					unsigned *num_pins)
+{
+	struct samsung_pinctrl_drv_data *pmx = pinctrl_dev_get_drvdata(pctldev);
+
+	*pins = pmx->pin_groups[group].pins;
+	*num_pins = pmx->pin_groups[group].num_pins;
+
+	return 0;
+}
+
+static int reserve_map(struct device *dev, struct pinctrl_map **map,
+		       unsigned *reserved_maps, unsigned *num_maps,
+		       unsigned reserve)
+{
+	unsigned old_num = *reserved_maps;
+	unsigned new_num = *num_maps + reserve;
+	struct pinctrl_map *new_map;
+
+	if (old_num >= new_num)
+		return 0;
+
+	new_map = krealloc(*map, sizeof(*new_map) * new_num, GFP_KERNEL);
+	if (!new_map) {
+		dev_err(dev, "krealloc(map) failed\n");
+		return -ENOMEM;
+	}
+
+	memset(new_map + old_num, 0, (new_num - old_num) * sizeof(*new_map));
+
+	*map = new_map;
+	*reserved_maps = new_num;
+
+	return 0;
+}
+
+static int add_map_mux(struct pinctrl_map **map, unsigned *reserved_maps,
+		       unsigned *num_maps, const char *group,
+		       const char *function)
+{
+	if (WARN_ON(*num_maps == *reserved_maps))
+		return -ENOSPC;
+
+	(*map)[*num_maps].type = PIN_MAP_TYPE_MUX_GROUP;
+	(*map)[*num_maps].data.mux.group = group;
+	(*map)[*num_maps].data.mux.function = function;
+	(*num_maps)++;
+
+	return 0;
+}
+
+static int add_map_configs(struct device *dev, struct pinctrl_map **map,
+			   unsigned *reserved_maps, unsigned *num_maps,
+			   const char *group, unsigned long *configs,
+			   unsigned num_configs)
+{
+	unsigned long *dup_configs;
+
+	if (WARN_ON(*num_maps == *reserved_maps))
+		return -ENOSPC;
+
+	dup_configs = kmemdup(configs, num_configs * sizeof(*dup_configs),
+			      GFP_KERNEL);
+	if (!dup_configs) {
+		dev_err(dev, "kmemdup(configs) failed\n");
+		return -ENOMEM;
+	}
+
+	(*map)[*num_maps].type = PIN_MAP_TYPE_CONFIGS_GROUP;
+	(*map)[*num_maps].data.configs.group_or_pin = group;
+	(*map)[*num_maps].data.configs.configs = dup_configs;
+	(*map)[*num_maps].data.configs.num_configs = num_configs;
+	(*num_maps)++;
+
+	return 0;
+}
+
+static int add_config(struct device *dev, unsigned long **configs,
+		      unsigned *num_configs, unsigned long config)
+{
+	unsigned old_num = *num_configs;
+	unsigned new_num = old_num + 1;
+	unsigned long *new_configs;
+
+	new_configs = krealloc(*configs, sizeof(*new_configs) * new_num,
+			       GFP_KERNEL);
+	if (!new_configs) {
+		dev_err(dev, "krealloc(configs) failed\n");
+		return -ENOMEM;
+	}
+
+	new_configs[old_num] = config;
+
+	*configs = new_configs;
+	*num_configs = new_num;
+
+	return 0;
+}
+
+static void samsung_dt_free_map(struct pinctrl_dev *pctldev,
+				      struct pinctrl_map *map,
+				      unsigned num_maps)
+{
+	int i;
+
+	for (i = 0; i < num_maps; i++)
+		if (map[i].type == PIN_MAP_TYPE_CONFIGS_GROUP)
+			kfree(map[i].data.configs.configs);
+
+	kfree(map);
+}
+
+static int samsung_dt_subnode_to_map(struct samsung_pinctrl_drv_data *drvdata,
+				     struct device *dev,
+				     struct device_node *np,
+				     struct pinctrl_map **map,
+				     unsigned *reserved_maps,
+				     unsigned *num_maps)
+{
+	int ret, i;
+	u32 val;
+	unsigned long config;
+	unsigned long *configs = NULL;
+	unsigned num_configs = 0;
+	unsigned reserve;
+	struct property *prop;
+	const char *group;
+	bool has_func = false;
+
+	ret = of_property_read_u32(np, "samsung,pin-function", &val);
+	if (!ret)
+		has_func = true;
+
+	for (i = 0; i < ARRAY_SIZE(cfg_params); i++) {
+		ret = of_property_read_u32(np, cfg_params[i].property, &val);
+		if (!ret) {
+			config = PINCFG_PACK(cfg_params[i].param, val);
+			ret = add_config(dev, &configs, &num_configs, config);
+			if (ret < 0)
+				goto exit;
+		/* EINVAL=missing, which is fine since it's optional */
+		} else if (ret != -EINVAL) {
+			dev_err(dev, "could not parse property %s\n",
+				cfg_params[i].property);
+		}
+	}
+
+	reserve = 0;
+	if (has_func)
+		reserve++;
+	if (num_configs)
+		reserve++;
+	ret = of_property_count_strings(np, "samsung,pins");
+	if (ret < 0) {
+		dev_err(dev, "could not parse property samsung,pins\n");
+		goto exit;
+	}
+	reserve *= ret;
+
+	ret = reserve_map(dev, map, reserved_maps, num_maps, reserve);
+	if (ret < 0)
+		goto exit;
+
+	of_property_for_each_string(np, "samsung,pins", prop, group) {
+		if (has_func) {
+			ret = add_map_mux(map, reserved_maps,
+						num_maps, group, np->full_name);
+			if (ret < 0)
+				goto exit;
+		}
+
+		if (num_configs) {
+			ret = add_map_configs(dev, map, reserved_maps,
+					      num_maps, group, configs,
+					      num_configs);
+			if (ret < 0)
+				goto exit;
+		}
+	}
+
+	ret = 0;
+
+exit:
+	kfree(configs);
+	return ret;
+}
+
+static int samsung_dt_node_to_map(struct pinctrl_dev *pctldev,
+					struct device_node *np_config,
+					struct pinctrl_map **map,
+					unsigned *num_maps)
+{
+	struct samsung_pinctrl_drv_data *drvdata;
+	unsigned reserved_maps;
+	struct device_node *np;
+	int ret;
+
+	drvdata = pinctrl_dev_get_drvdata(pctldev);
+
+	reserved_maps = 0;
+	*map = NULL;
+	*num_maps = 0;
+
+	if (!of_get_child_count(np_config))
+		return samsung_dt_subnode_to_map(drvdata, pctldev->dev,
+							np_config, map,
+							&reserved_maps,
+							num_maps);
+
+	for_each_child_of_node(np_config, np) {
+		ret = samsung_dt_subnode_to_map(drvdata, pctldev->dev, np, map,
+						&reserved_maps, num_maps);
+		if (ret < 0) {
+			samsung_dt_free_map(pctldev, *map, *num_maps);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+/* list of pinctrl callbacks for the pinctrl core */
+static const struct pinctrl_ops samsung_pctrl_ops = {
+	.get_groups_count	= samsung_get_group_count,
+	.get_group_name		= samsung_get_group_name,
+	.get_group_pins		= samsung_get_group_pins,
+	.dt_node_to_map		= samsung_dt_node_to_map,
+	.dt_free_map		= samsung_dt_free_map,
+};
+
+/* check if the selector is a valid pin function selector */
+static int samsung_get_functions_count(struct pinctrl_dev *pctldev)
+{
+	struct samsung_pinctrl_drv_data *drvdata;
+
+	drvdata = pinctrl_dev_get_drvdata(pctldev);
+	return drvdata->nr_functions;
+}
+
+/* return the name of the pin function specified */
+static const char *samsung_pinmux_get_fname(struct pinctrl_dev *pctldev,
+						unsigned selector)
+{
+	struct samsung_pinctrl_drv_data *drvdata;
+
+	drvdata = pinctrl_dev_get_drvdata(pctldev);
+	return drvdata->pmx_functions[selector].name;
+}
+
+/* return the groups associated for the specified function selector */
+static int samsung_pinmux_get_groups(struct pinctrl_dev *pctldev,
+		unsigned selector, const char * const **groups,
+		unsigned * const num_groups)
+{
+	struct samsung_pinctrl_drv_data *drvdata;
+
+	drvdata = pinctrl_dev_get_drvdata(pctldev);
+	*groups = drvdata->pmx_functions[selector].groups;
+	*num_groups = drvdata->pmx_functions[selector].num_groups;
+	return 0;
+}
+
+/*
+ * given a pin number that is local to a pin controller, find out the pin bank
+ * and the register base of the pin bank.
+ */
+static void pin_to_reg_bank(struct samsung_pinctrl_drv_data *drvdata,
+			unsigned pin, void __iomem **reg, u32 *offset,
+			struct samsung_pin_bank **bank)
+{
+	struct samsung_pin_bank *b;
+
+	b = drvdata->ctrl->pin_banks;
+
+	while ((pin >= b->pin_base) &&
+			((b->pin_base + b->nr_pins - 1) < pin))
+		b++;
+
+	*reg = drvdata->virt_base + b->pctl_offset;
+	*offset = pin - b->pin_base;
+	if (bank)
+		*bank = b;
+}
+
+/* enable or disable a pinmux function */
+static void samsung_pinmux_setup(struct pinctrl_dev *pctldev, unsigned selector,
+					unsigned group, bool enable)
+{
+	struct samsung_pinctrl_drv_data *drvdata;
+	struct samsung_pin_bank_type *type;
+	struct samsung_pin_bank *bank;
+	void __iomem *reg;
+	u32 mask, shift, data, pin_offset;
+	unsigned long flags;
+	const struct samsung_pmx_func *func;
+	const struct samsung_pin_group *grp;
+
+	drvdata = pinctrl_dev_get_drvdata(pctldev);
+	func = &drvdata->pmx_functions[selector];
+	grp = &drvdata->pin_groups[group];
+
+	pin_to_reg_bank(drvdata, grp->pins[0] - drvdata->ctrl->base,
+			&reg, &pin_offset, &bank);
+	type = bank->type;
+	mask = (1 << type->fld_width[PINCFG_TYPE_FUNC]) - 1;
+	shift = pin_offset * type->fld_width[PINCFG_TYPE_FUNC];
+	if (shift >= 32) {
+		/* Some banks have two config registers */
+		shift -= 32;
+		reg += 4;
+	}
+
+	spin_lock_irqsave(&bank->slock, flags);
+
+	data = readl(reg + type->reg_offset[PINCFG_TYPE_FUNC]);
+	data &= ~(mask << shift);
+	if (enable)
+		data |= func->val << shift;
+	writel(data, reg + type->reg_offset[PINCFG_TYPE_FUNC]);
+
+	spin_unlock_irqrestore(&bank->slock, flags);
+}
+
+/* enable a specified pinmux by writing to registers */
+static int samsung_pinmux_enable(struct pinctrl_dev *pctldev, unsigned selector,
+					unsigned group)
+{
+	samsung_pinmux_setup(pctldev, selector, group, true);
+	return 0;
+}
+
+/* list of pinmux callbacks for the pinmux vertical in pinctrl core */
+static const struct pinmux_ops samsung_pinmux_ops = {
+	.get_functions_count	= samsung_get_functions_count,
+	.get_function_name	= samsung_pinmux_get_fname,
+	.get_function_groups	= samsung_pinmux_get_groups,
+	.enable			= samsung_pinmux_enable,
+};
+
+/* set or get the pin config settings for a specified pin */
+static int samsung_pinconf_rw(struct pinctrl_dev *pctldev, unsigned int pin,
+				unsigned long *config, bool set)
+{
+	struct samsung_pinctrl_drv_data *drvdata;
+	struct samsung_pin_bank_type *type;
+	struct samsung_pin_bank *bank;
+	void __iomem *reg_base;
+	enum pincfg_type cfg_type = PINCFG_UNPACK_TYPE(*config);
+	u32 data, width, pin_offset, mask, shift;
+	u32 cfg_value, cfg_reg;
+	unsigned long flags;
+
+	drvdata = pinctrl_dev_get_drvdata(pctldev);
+	pin_to_reg_bank(drvdata, pin - drvdata->ctrl->base, &reg_base,
+					&pin_offset, &bank);
+	type = bank->type;
+
+	if (cfg_type >= PINCFG_TYPE_NUM || !type->fld_width[cfg_type])
+		return -EINVAL;
+
+	width = type->fld_width[cfg_type];
+	cfg_reg = type->reg_offset[cfg_type];
+
+	spin_lock_irqsave(&bank->slock, flags);
+
+	mask = (1 << width) - 1;
+	shift = pin_offset * width;
+	data = readl(reg_base + cfg_reg);
+
+	if (set) {
+		cfg_value = PINCFG_UNPACK_VALUE(*config);
+		data &= ~(mask << shift);
+		data |= (cfg_value << shift);
+		writel(data, reg_base + cfg_reg);
+	} else {
+		data >>= shift;
+		data &= mask;
+		*config = PINCFG_PACK(cfg_type, data);
+	}
+
+	spin_unlock_irqrestore(&bank->slock, flags);
+
+	return 0;
+}
+
+/* set the pin config settings for a specified pin */
+static int samsung_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
+				unsigned long *configs, unsigned num_configs)
+{
+	int i, ret;
+
+	for (i = 0; i < num_configs; i++) {
+		ret = samsung_pinconf_rw(pctldev, pin, &configs[i], true);
+		if (ret < 0)
+			return ret;
+	} /* for each config */
+
+	return 0;
+}
+
+/* get the pin config settings for a specified pin */
+static int samsung_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin,
+					unsigned long *config)
+{
+	return samsung_pinconf_rw(pctldev, pin, config, false);
+}
+
+/* set the pin config settings for a specified pin group */
+static int samsung_pinconf_group_set(struct pinctrl_dev *pctldev,
+			unsigned group, unsigned long *configs,
+			unsigned num_configs)
+{
+	struct samsung_pinctrl_drv_data *drvdata;
+	const unsigned int *pins;
+	unsigned int cnt;
+
+	drvdata = pinctrl_dev_get_drvdata(pctldev);
+	pins = drvdata->pin_groups[group].pins;
+
+	for (cnt = 0; cnt < drvdata->pin_groups[group].num_pins; cnt++)
+		samsung_pinconf_set(pctldev, pins[cnt], configs, num_configs);
+
+	return 0;
+}
+
+/* get the pin config settings for a specified pin group */
+static int samsung_pinconf_group_get(struct pinctrl_dev *pctldev,
+				unsigned int group, unsigned long *config)
+{
+	struct samsung_pinctrl_drv_data *drvdata;
+	const unsigned int *pins;
+
+	drvdata = pinctrl_dev_get_drvdata(pctldev);
+	pins = drvdata->pin_groups[group].pins;
+	samsung_pinconf_get(pctldev, pins[0], config);
+	return 0;
+}
+
+/* list of pinconfig callbacks for pinconfig vertical in the pinctrl code */
+static const struct pinconf_ops samsung_pinconf_ops = {
+	.pin_config_get		= samsung_pinconf_get,
+	.pin_config_set		= samsung_pinconf_set,
+	.pin_config_group_get	= samsung_pinconf_group_get,
+	.pin_config_group_set	= samsung_pinconf_group_set,
+};
+
+/* gpiolib gpio_set callback function */
+static void samsung_gpio_set(struct gpio_chip *gc, unsigned offset, int value)
+{
+	struct samsung_pin_bank *bank = gc_to_pin_bank(gc);
+	struct samsung_pin_bank_type *type = bank->type;
+	unsigned long flags;
+	void __iomem *reg;
+	u32 data;
+
+	reg = bank->drvdata->virt_base + bank->pctl_offset;
+
+	spin_lock_irqsave(&bank->slock, flags);
+
+	data = readl(reg + type->reg_offset[PINCFG_TYPE_DAT]);
+	data &= ~(1 << offset);
+	if (value)
+		data |= 1 << offset;
+	writel(data, reg + type->reg_offset[PINCFG_TYPE_DAT]);
+
+	spin_unlock_irqrestore(&bank->slock, flags);
+}
+
+/* gpiolib gpio_get callback function */
+static int samsung_gpio_get(struct gpio_chip *gc, unsigned offset)
+{
+	void __iomem *reg;
+	u32 data;
+	struct samsung_pin_bank *bank = gc_to_pin_bank(gc);
+	struct samsung_pin_bank_type *type = bank->type;
+
+	reg = bank->drvdata->virt_base + bank->pctl_offset;
+
+	data = readl(reg + type->reg_offset[PINCFG_TYPE_DAT]);
+	data >>= offset;
+	data &= 1;
+	return data;
+}
+
+/*
+ * The calls to gpio_direction_output() and gpio_direction_input()
+ * leads to this function call.
+ */
+static int samsung_gpio_set_direction(struct gpio_chip *gc,
+					     unsigned offset, bool input)
+{
+	struct samsung_pin_bank_type *type;
+	struct samsung_pin_bank *bank;
+	struct samsung_pinctrl_drv_data *drvdata;
+	void __iomem *reg;
+	u32 data, mask, shift;
+	unsigned long flags;
+
+	bank = gc_to_pin_bank(gc);
+	type = bank->type;
+	drvdata = bank->drvdata;
+
+	reg = drvdata->virt_base + bank->pctl_offset +
+					type->reg_offset[PINCFG_TYPE_FUNC];
+
+	mask = (1 << type->fld_width[PINCFG_TYPE_FUNC]) - 1;
+	shift = offset * type->fld_width[PINCFG_TYPE_FUNC];
+	if (shift >= 32) {
+		/* Some banks have two config registers */
+		shift -= 32;
+		reg += 4;
+	}
+
+	spin_lock_irqsave(&bank->slock, flags);
+
+	data = readl(reg);
+	data &= ~(mask << shift);
+	if (!input)
+		data |= FUNC_OUTPUT << shift;
+	writel(data, reg);
+
+	spin_unlock_irqrestore(&bank->slock, flags);
+
+	return 0;
+}
+
+/* gpiolib gpio_direction_input callback function. */
+static int samsung_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
+{
+	return samsung_gpio_set_direction(gc, offset, true);
+}
+
+/* gpiolib gpio_direction_output callback function. */
+static int samsung_gpio_direction_output(struct gpio_chip *gc, unsigned offset,
+							int value)
+{
+	samsung_gpio_set(gc, offset, value);
+	return samsung_gpio_set_direction(gc, offset, false);
+}
+
+/*
+ * gpiolib gpio_to_irq callback function. Creates a mapping between a GPIO pin
+ * and a virtual IRQ, if not already present.
+ */
+static int samsung_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
+{
+	struct samsung_pin_bank *bank = gc_to_pin_bank(gc);
+	unsigned int virq;
+
+	if (!bank->irq_domain)
+		return -ENXIO;
+
+	virq = irq_create_mapping(bank->irq_domain, offset);
+
+	return (virq) ? : -ENXIO;
+}
+
+static struct samsung_pin_group *samsung_pinctrl_create_groups(
+				struct device *dev,
+				struct samsung_pinctrl_drv_data *drvdata,
+				unsigned int *cnt)
+{
+	struct pinctrl_desc *ctrldesc = &drvdata->pctl;
+	struct samsung_pin_group *groups, *grp;
+	const struct pinctrl_pin_desc *pdesc;
+	int i;
+
+	groups = devm_kzalloc(dev, ctrldesc->npins * sizeof(*groups),
+				GFP_KERNEL);
+	if (!groups)
+		return ERR_PTR(-EINVAL);
+	grp = groups;
+
+	pdesc = ctrldesc->pins;
+	for (i = 0; i < ctrldesc->npins; ++i, ++pdesc, ++grp) {
+		grp->name = pdesc->name;
+		grp->pins = &pdesc->number;
+		grp->num_pins = 1;
+	}
+
+	*cnt = ctrldesc->npins;
+	return groups;
+}
+
+static int samsung_pinctrl_create_function(struct device *dev,
+				struct samsung_pinctrl_drv_data *drvdata,
+				struct device_node *func_np,
+				struct samsung_pmx_func *func)
+{
+	int npins;
+	int ret;
+	int i;
+
+	if (of_property_read_u32(func_np, "samsung,pin-function", &func->val))
+		return 0;
+
+	npins = of_property_count_strings(func_np, "samsung,pins");
+	if (npins < 1) {
+		dev_err(dev, "invalid pin list in %s node", func_np->name);
+		return -EINVAL;
+	}
+
+	func->name = func_np->full_name;
+
+	func->groups = devm_kzalloc(dev, npins * sizeof(char *), GFP_KERNEL);
+	if (!func->groups)
+		return -ENOMEM;
+
+	for (i = 0; i < npins; ++i) {
+		const char *gname;
+
+		ret = of_property_read_string_index(func_np, "samsung,pins",
+							i, &gname);
+		if (ret) {
+			dev_err(dev,
+				"failed to read pin name %d from %s node\n",
+				i, func_np->name);
+			return ret;
+		}
+
+		func->groups[i] = gname;
+	}
+
+	func->num_groups = npins;
+	return 1;
+}
+
+static struct samsung_pmx_func *samsung_pinctrl_create_functions(
+				struct device *dev,
+				struct samsung_pinctrl_drv_data *drvdata,
+				unsigned int *cnt)
+{
+	struct samsung_pmx_func *functions, *func;
+	struct device_node *dev_np = dev->of_node;
+	struct device_node *cfg_np;
+	unsigned int func_cnt = 0;
+	int ret;
+
+	/*
+	 * Iterate over all the child nodes of the pin controller node
+	 * and create pin groups and pin function lists.
+	 */
+	for_each_child_of_node(dev_np, cfg_np) {
+		struct device_node *func_np;
+
+		if (!of_get_child_count(cfg_np)) {
+			if (!of_find_property(cfg_np,
+			    "samsung,pin-function", NULL))
+				continue;
+			++func_cnt;
+			continue;
+		}
+
+		for_each_child_of_node(cfg_np, func_np) {
+			if (!of_find_property(func_np,
+			    "samsung,pin-function", NULL))
+				continue;
+			++func_cnt;
+		}
+	}
+
+	functions = devm_kzalloc(dev, func_cnt * sizeof(*functions),
+					GFP_KERNEL);
+	if (!functions) {
+		dev_err(dev, "failed to allocate memory for function list\n");
+		return ERR_PTR(-EINVAL);
+	}
+	func = functions;
+
+	/*
+	 * Iterate over all the child nodes of the pin controller node
+	 * and create pin groups and pin function lists.
+	 */
+	func_cnt = 0;
+	for_each_child_of_node(dev_np, cfg_np) {
+		struct device_node *func_np;
+
+		if (!of_get_child_count(cfg_np)) {
+			ret = samsung_pinctrl_create_function(dev, drvdata,
+							cfg_np, func);
+			if (ret < 0)
+				return ERR_PTR(ret);
+			if (ret > 0) {
+				++func;
+				++func_cnt;
+			}
+			continue;
+		}
+
+		for_each_child_of_node(cfg_np, func_np) {
+			ret = samsung_pinctrl_create_function(dev, drvdata,
+						func_np, func);
+			if (ret < 0)
+				return ERR_PTR(ret);
+			if (ret > 0) {
+				++func;
+				++func_cnt;
+			}
+		}
+	}
+
+	*cnt = func_cnt;
+	return functions;
+}
+
+/*
+ * Parse the information about all the available pin groups and pin functions
+ * from device node of the pin-controller. A pin group is formed with all
+ * the pins listed in the "samsung,pins" property.
+ */
+
+static int samsung_pinctrl_parse_dt(struct platform_device *pdev,
+				    struct samsung_pinctrl_drv_data *drvdata)
+{
+	struct device *dev = &pdev->dev;
+	struct samsung_pin_group *groups;
+	struct samsung_pmx_func *functions;
+	unsigned int grp_cnt = 0, func_cnt = 0;
+
+	groups = samsung_pinctrl_create_groups(dev, drvdata, &grp_cnt);
+	if (IS_ERR(groups)) {
+		dev_err(dev, "failed to parse pin groups\n");
+		return PTR_ERR(groups);
+	}
+
+	functions = samsung_pinctrl_create_functions(dev, drvdata, &func_cnt);
+	if (IS_ERR(functions)) {
+		dev_err(dev, "failed to parse pin functions\n");
+		return PTR_ERR(groups);
+	}
+
+	drvdata->pin_groups = groups;
+	drvdata->nr_groups = grp_cnt;
+	drvdata->pmx_functions = functions;
+	drvdata->nr_functions = func_cnt;
+
+	return 0;
+}
+
+/* register the pinctrl interface with the pinctrl subsystem */
+static int samsung_pinctrl_register(struct platform_device *pdev,
+				    struct samsung_pinctrl_drv_data *drvdata)
+{
+	struct pinctrl_desc *ctrldesc = &drvdata->pctl;
+	struct pinctrl_pin_desc *pindesc, *pdesc;
+	struct samsung_pin_bank *pin_bank;
+	char *pin_names;
+	int pin, bank, ret;
+
+	ctrldesc->name = "samsung-pinctrl";
+	ctrldesc->owner = THIS_MODULE;
+	ctrldesc->pctlops = &samsung_pctrl_ops;
+	ctrldesc->pmxops = &samsung_pinmux_ops;
+	ctrldesc->confops = &samsung_pinconf_ops;
+
+	pindesc = devm_kzalloc(&pdev->dev, sizeof(*pindesc) *
+			drvdata->ctrl->nr_pins, GFP_KERNEL);
+	if (!pindesc) {
+		dev_err(&pdev->dev, "mem alloc for pin descriptors failed\n");
+		return -ENOMEM;
+	}
+	ctrldesc->pins = pindesc;
+	ctrldesc->npins = drvdata->ctrl->nr_pins;
+
+	/* dynamically populate the pin number and pin name for pindesc */
+	for (pin = 0, pdesc = pindesc; pin < ctrldesc->npins; pin++, pdesc++)
+		pdesc->number = pin + drvdata->ctrl->base;
+
+	/*
+	 * allocate space for storing the dynamically generated names for all
+	 * the pins which belong to this pin-controller.
+	 */
+	pin_names = devm_kzalloc(&pdev->dev, sizeof(char) * PIN_NAME_LENGTH *
+					drvdata->ctrl->nr_pins, GFP_KERNEL);
+	if (!pin_names) {
+		dev_err(&pdev->dev, "mem alloc for pin names failed\n");
+		return -ENOMEM;
+	}
+
+	/* for each pin, the name of the pin is pin-bank name + pin number */
+	for (bank = 0; bank < drvdata->ctrl->nr_banks; bank++) {
+		pin_bank = &drvdata->ctrl->pin_banks[bank];
+		for (pin = 0; pin < pin_bank->nr_pins; pin++) {
+			sprintf(pin_names, "%s-%d", pin_bank->name, pin);
+			pdesc = pindesc + pin_bank->pin_base + pin;
+			pdesc->name = pin_names;
+			pin_names += PIN_NAME_LENGTH;
+		}
+	}
+
+	ret = samsung_pinctrl_parse_dt(pdev, drvdata);
+	if (ret)
+		return ret;
+
+	drvdata->pctl_dev = pinctrl_register(ctrldesc, &pdev->dev, drvdata);
+	if (!drvdata->pctl_dev) {
+		dev_err(&pdev->dev, "could not register pinctrl driver\n");
+		return -EINVAL;
+	}
+
+	for (bank = 0; bank < drvdata->ctrl->nr_banks; ++bank) {
+		pin_bank = &drvdata->ctrl->pin_banks[bank];
+		pin_bank->grange.name = pin_bank->name;
+		pin_bank->grange.id = bank;
+		pin_bank->grange.pin_base = drvdata->ctrl->base
+						+ pin_bank->pin_base;
+		pin_bank->grange.base = pin_bank->gpio_chip.base;
+		pin_bank->grange.npins = pin_bank->gpio_chip.ngpio;
+		pin_bank->grange.gc = &pin_bank->gpio_chip;
+		pinctrl_add_gpio_range(drvdata->pctl_dev, &pin_bank->grange);
+	}
+
+	return 0;
+}
+
+static int samsung_gpio_request(struct gpio_chip *chip, unsigned offset)
+{
+	return pinctrl_request_gpio(chip->base + offset);
+}
+
+static void samsung_gpio_free(struct gpio_chip *chip, unsigned offset)
+{
+	pinctrl_free_gpio(chip->base + offset);
+}
+
+static const struct gpio_chip samsung_gpiolib_chip = {
+	.request = samsung_gpio_request,
+	.free = samsung_gpio_free,
+	.set = samsung_gpio_set,
+	.get = samsung_gpio_get,
+	.direction_input = samsung_gpio_direction_input,
+	.direction_output = samsung_gpio_direction_output,
+	.to_irq = samsung_gpio_to_irq,
+	.owner = THIS_MODULE,
+};
+
+/* register the gpiolib interface with the gpiolib subsystem */
+static int samsung_gpiolib_register(struct platform_device *pdev,
+				    struct samsung_pinctrl_drv_data *drvdata)
+{
+	struct samsung_pin_ctrl *ctrl = drvdata->ctrl;
+	struct samsung_pin_bank *bank = ctrl->pin_banks;
+	struct gpio_chip *gc;
+	int ret;
+	int i;
+
+	for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
+		bank->gpio_chip = samsung_gpiolib_chip;
+
+		gc = &bank->gpio_chip;
+		gc->base = ctrl->base + bank->pin_base;
+		gc->ngpio = bank->nr_pins;
+		gc->dev = &pdev->dev;
+		gc->of_node = bank->of_node;
+		gc->label = bank->name;
+
+		ret = gpiochip_add(gc);
+		if (ret) {
+			dev_err(&pdev->dev, "failed to register gpio_chip %s, error code: %d\n",
+							gc->label, ret);
+			goto fail;
+		}
+	}
+
+	return 0;
+
+fail:
+	for (--i, --bank; i >= 0; --i, --bank)
+		if (gpiochip_remove(&bank->gpio_chip))
+			dev_err(&pdev->dev, "gpio chip %s remove failed\n",
+							bank->gpio_chip.label);
+	return ret;
+}
+
+/* unregister the gpiolib interface with the gpiolib subsystem */
+static int samsung_gpiolib_unregister(struct platform_device *pdev,
+				      struct samsung_pinctrl_drv_data *drvdata)
+{
+	struct samsung_pin_ctrl *ctrl = drvdata->ctrl;
+	struct samsung_pin_bank *bank = ctrl->pin_banks;
+	int ret = 0;
+	int i;
+
+	for (i = 0; !ret && i < ctrl->nr_banks; ++i, ++bank)
+		ret = gpiochip_remove(&bank->gpio_chip);
+
+	if (ret)
+		dev_err(&pdev->dev, "gpio chip remove failed\n");
+
+	return ret;
+}
+
+static const struct of_device_id samsung_pinctrl_dt_match[];
+
+/* retrieve the soc specific data */
+static struct samsung_pin_ctrl *samsung_pinctrl_get_soc_data(
+				struct samsung_pinctrl_drv_data *d,
+				struct platform_device *pdev)
+{
+	int id;
+	const struct of_device_id *match;
+	struct device_node *node = pdev->dev.of_node;
+	struct device_node *np;
+	struct samsung_pin_ctrl *ctrl;
+	struct samsung_pin_bank *bank;
+	int i;
+
+	id = of_alias_get_id(node, "pinctrl");
+	if (id < 0) {
+		dev_err(&pdev->dev, "failed to get alias id\n");
+		return NULL;
+	}
+	match = of_match_node(samsung_pinctrl_dt_match, node);
+	ctrl = (struct samsung_pin_ctrl *)match->data + id;
+
+	bank = ctrl->pin_banks;
+	for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
+		spin_lock_init(&bank->slock);
+		bank->drvdata = d;
+		bank->pin_base = ctrl->nr_pins;
+		ctrl->nr_pins += bank->nr_pins;
+	}
+
+	for_each_child_of_node(node, np) {
+		if (!of_find_property(np, "gpio-controller", NULL))
+			continue;
+		bank = ctrl->pin_banks;
+		for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
+			if (!strcmp(bank->name, np->name)) {
+				bank->of_node = np;
+				break;
+			}
+		}
+	}
+
+	ctrl->base = pin_base;
+	pin_base += ctrl->nr_pins;
+
+	return ctrl;
+}
+
+static int samsung_pinctrl_probe(struct platform_device *pdev)
+{
+	struct samsung_pinctrl_drv_data *drvdata;
+	struct device *dev = &pdev->dev;
+	struct samsung_pin_ctrl *ctrl;
+	struct resource *res;
+	int ret;
+
+	if (!dev->of_node) {
+		dev_err(dev, "device tree node not found\n");
+		return -ENODEV;
+	}
+
+	drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
+	if (!drvdata) {
+		dev_err(dev, "failed to allocate memory for driver's "
+				"private data\n");
+		return -ENOMEM;
+	}
+
+	ctrl = samsung_pinctrl_get_soc_data(drvdata, pdev);
+	if (!ctrl) {
+		dev_err(&pdev->dev, "driver data not available\n");
+		return -EINVAL;
+	}
+	drvdata->ctrl = ctrl;
+	drvdata->dev = dev;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	drvdata->virt_base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(drvdata->virt_base))
+		return PTR_ERR(drvdata->virt_base);
+
+	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+	if (res)
+		drvdata->irq = res->start;
+
+	ret = samsung_gpiolib_register(pdev, drvdata);
+	if (ret)
+		return ret;
+
+	ret = samsung_pinctrl_register(pdev, drvdata);
+	if (ret) {
+		samsung_gpiolib_unregister(pdev, drvdata);
+		return ret;
+	}
+
+	if (ctrl->eint_gpio_init)
+		ctrl->eint_gpio_init(drvdata);
+	if (ctrl->eint_wkup_init)
+		ctrl->eint_wkup_init(drvdata);
+
+	platform_set_drvdata(pdev, drvdata);
+
+	/* Add to the global list */
+	list_add_tail(&drvdata->node, &drvdata_list);
+
+	return 0;
+}
+
+#ifdef CONFIG_PM
+
+/**
+ * samsung_pinctrl_suspend_dev - save pinctrl state for suspend for a device
+ *
+ * Save data for all banks handled by this device.
+ */
+static void samsung_pinctrl_suspend_dev(
+	struct samsung_pinctrl_drv_data *drvdata)
+{
+	struct samsung_pin_ctrl *ctrl = drvdata->ctrl;
+	void __iomem *virt_base = drvdata->virt_base;
+	int i;
+
+	for (i = 0; i < ctrl->nr_banks; i++) {
+		struct samsung_pin_bank *bank = &ctrl->pin_banks[i];
+		void __iomem *reg = virt_base + bank->pctl_offset;
+
+		u8 *offs = bank->type->reg_offset;
+		u8 *widths = bank->type->fld_width;
+		enum pincfg_type type;
+
+		/* Registers without a powerdown config aren't lost */
+		if (!widths[PINCFG_TYPE_CON_PDN])
+			continue;
+
+		for (type = 0; type < PINCFG_TYPE_NUM; type++)
+			if (widths[type])
+				bank->pm_save[type] = readl(reg + offs[type]);
+
+		if (widths[PINCFG_TYPE_FUNC] * bank->nr_pins > 32) {
+			/* Some banks have two config registers */
+			bank->pm_save[PINCFG_TYPE_NUM] =
+				readl(reg + offs[PINCFG_TYPE_FUNC] + 4);
+			pr_debug("Save %s @ %p (con %#010x %08x)\n",
+				 bank->name, reg,
+				 bank->pm_save[PINCFG_TYPE_FUNC],
+				 bank->pm_save[PINCFG_TYPE_NUM]);
+		} else {
+			pr_debug("Save %s @ %p (con %#010x)\n", bank->name,
+				 reg, bank->pm_save[PINCFG_TYPE_FUNC]);
+		}
+	}
+
+	if (ctrl->suspend)
+		ctrl->suspend(drvdata);
+}
+
+/**
+ * samsung_pinctrl_resume_dev - restore pinctrl state from suspend for a device
+ *
+ * Restore one of the banks that was saved during suspend.
+ *
+ * We don't bother doing anything complicated to avoid glitching lines since
+ * we're called before pad retention is turned off.
+ */
+static void samsung_pinctrl_resume_dev(struct samsung_pinctrl_drv_data *drvdata)
+{
+	struct samsung_pin_ctrl *ctrl = drvdata->ctrl;
+	void __iomem *virt_base = drvdata->virt_base;
+	int i;
+
+	if (ctrl->resume)
+		ctrl->resume(drvdata);
+
+	for (i = 0; i < ctrl->nr_banks; i++) {
+		struct samsung_pin_bank *bank = &ctrl->pin_banks[i];
+		void __iomem *reg = virt_base + bank->pctl_offset;
+
+		u8 *offs = bank->type->reg_offset;
+		u8 *widths = bank->type->fld_width;
+		enum pincfg_type type;
+
+		/* Registers without a powerdown config aren't lost */
+		if (!widths[PINCFG_TYPE_CON_PDN])
+			continue;
+
+		if (widths[PINCFG_TYPE_FUNC] * bank->nr_pins > 32) {
+			/* Some banks have two config registers */
+			pr_debug("%s @ %p (con %#010x %08x => %#010x %08x)\n",
+				 bank->name, reg,
+				 readl(reg + offs[PINCFG_TYPE_FUNC]),
+				 readl(reg + offs[PINCFG_TYPE_FUNC] + 4),
+				 bank->pm_save[PINCFG_TYPE_FUNC],
+				 bank->pm_save[PINCFG_TYPE_NUM]);
+			writel(bank->pm_save[PINCFG_TYPE_NUM],
+			       reg + offs[PINCFG_TYPE_FUNC] + 4);
+		} else {
+			pr_debug("%s @ %p (con %#010x => %#010x)\n", bank->name,
+				 reg, readl(reg + offs[PINCFG_TYPE_FUNC]),
+				 bank->pm_save[PINCFG_TYPE_FUNC]);
+		}
+		for (type = 0; type < PINCFG_TYPE_NUM; type++)
+			if (widths[type])
+				writel(bank->pm_save[type], reg + offs[type]);
+	}
+}
+
+/**
+ * samsung_pinctrl_suspend - save pinctrl state for suspend
+ *
+ * Save data for all banks across all devices.
+ */
+static int samsung_pinctrl_suspend(void)
+{
+	struct samsung_pinctrl_drv_data *drvdata;
+
+	list_for_each_entry(drvdata, &drvdata_list, node) {
+		samsung_pinctrl_suspend_dev(drvdata);
+	}
+
+	return 0;
+}
+
+/**
+ * samsung_pinctrl_resume - restore pinctrl state for suspend
+ *
+ * Restore data for all banks across all devices.
+ */
+static void samsung_pinctrl_resume(void)
+{
+	struct samsung_pinctrl_drv_data *drvdata;
+
+	list_for_each_entry_reverse(drvdata, &drvdata_list, node) {
+		samsung_pinctrl_resume_dev(drvdata);
+	}
+}
+
+#else
+#define samsung_pinctrl_suspend		NULL
+#define samsung_pinctrl_resume		NULL
+#endif
+
+static struct syscore_ops samsung_pinctrl_syscore_ops = {
+	.suspend	= samsung_pinctrl_suspend,
+	.resume		= samsung_pinctrl_resume,
+};
+
+static const struct of_device_id samsung_pinctrl_dt_match[] = {
+#ifdef CONFIG_PINCTRL_EXYNOS
+	{ .compatible = "samsung,exynos3250-pinctrl",
+		.data = (void *)exynos3250_pin_ctrl },
+	{ .compatible = "samsung,exynos4210-pinctrl",
+		.data = (void *)exynos4210_pin_ctrl },
+	{ .compatible = "samsung,exynos4x12-pinctrl",
+		.data = (void *)exynos4x12_pin_ctrl },
+	{ .compatible = "samsung,exynos5250-pinctrl",
+		.data = (void *)exynos5250_pin_ctrl },
+	{ .compatible = "samsung,exynos5260-pinctrl",
+		.data = (void *)exynos5260_pin_ctrl },
+	{ .compatible = "samsung,exynos5420-pinctrl",
+		.data = (void *)exynos5420_pin_ctrl },
+	{ .compatible = "samsung,s5pv210-pinctrl",
+		.data = (void *)s5pv210_pin_ctrl },
+#endif
+#ifdef CONFIG_PINCTRL_S3C64XX
+	{ .compatible = "samsung,s3c64xx-pinctrl",
+		.data = s3c64xx_pin_ctrl },
+#endif
+#ifdef CONFIG_PINCTRL_S3C24XX
+	{ .compatible = "samsung,s3c2412-pinctrl",
+		.data = s3c2412_pin_ctrl },
+	{ .compatible = "samsung,s3c2416-pinctrl",
+		.data = s3c2416_pin_ctrl },
+	{ .compatible = "samsung,s3c2440-pinctrl",
+		.data = s3c2440_pin_ctrl },
+	{ .compatible = "samsung,s3c2450-pinctrl",
+		.data = s3c2450_pin_ctrl },
+#endif
+	{},
+};
+MODULE_DEVICE_TABLE(of, samsung_pinctrl_dt_match);
+
+static struct platform_driver samsung_pinctrl_driver = {
+	.probe		= samsung_pinctrl_probe,
+	.driver = {
+		.name	= "samsung-pinctrl",
+		.owner	= THIS_MODULE,
+		.of_match_table = samsung_pinctrl_dt_match,
+	},
+};
+
+static int __init samsung_pinctrl_drv_register(void)
+{
+	/*
+	 * Register syscore ops for save/restore of registers across suspend.
+	 * It's important to ensure that this driver is running at an earlier
+	 * initcall level than any arch-specific init calls that install syscore
+	 * ops that turn off pad retention (like exynos_pm_resume).
+	 */
+	register_syscore_ops(&samsung_pinctrl_syscore_ops);
+
+	return platform_driver_register(&samsung_pinctrl_driver);
+}
+postcore_initcall(samsung_pinctrl_drv_register);
+
+static void __exit samsung_pinctrl_drv_unregister(void)
+{
+	platform_driver_unregister(&samsung_pinctrl_driver);
+}
+module_exit(samsung_pinctrl_drv_unregister);
+
+MODULE_AUTHOR("Thomas Abraham <thomas.ab@samsung.com>");
+MODULE_DESCRIPTION("Samsung pinctrl driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/pinctrl/samsung/pinctrl-samsung.h b/drivers/pinctrl/samsung/pinctrl-samsung.h
new file mode 100644
index 0000000..2b88232
--- /dev/null
+++ b/drivers/pinctrl/samsung/pinctrl-samsung.h
@@ -0,0 +1,251 @@
+/*
+ * pin-controller/pin-mux/pin-config/gpio-driver for Samsung's SoC's.
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com
+ * Copyright (c) 2012 Linaro Ltd
+ *		http://www.linaro.org
+ *
+ * Author: Thomas Abraham <thomas.ab@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef __PINCTRL_SAMSUNG_H
+#define __PINCTRL_SAMSUNG_H
+
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/pinctrl/machine.h>
+
+#include <linux/gpio.h>
+
+/* pinmux function number for pin as gpio output line */
+#define FUNC_OUTPUT	0x1
+
+/**
+ * enum pincfg_type - possible pin configuration types supported.
+ * @PINCFG_TYPE_FUNC: Function configuration.
+ * @PINCFG_TYPE_DAT: Pin value configuration.
+ * @PINCFG_TYPE_PUD: Pull up/down configuration.
+ * @PINCFG_TYPE_DRV: Drive strength configuration.
+ * @PINCFG_TYPE_CON_PDN: Pin function in power down mode.
+ * @PINCFG_TYPE_PUD_PDN: Pull up/down configuration in power down mode.
+ */
+enum pincfg_type {
+	PINCFG_TYPE_FUNC,
+	PINCFG_TYPE_DAT,
+	PINCFG_TYPE_PUD,
+	PINCFG_TYPE_DRV,
+	PINCFG_TYPE_CON_PDN,
+	PINCFG_TYPE_PUD_PDN,
+
+	PINCFG_TYPE_NUM
+};
+
+/*
+ * pin configuration (pull up/down and drive strength) type and its value are
+ * packed together into a 16-bits. The upper 8-bits represent the configuration
+ * type and the lower 8-bits hold the value of the configuration type.
+ */
+#define PINCFG_TYPE_MASK		0xFF
+#define PINCFG_VALUE_SHIFT		8
+#define PINCFG_VALUE_MASK		(0xFF << PINCFG_VALUE_SHIFT)
+#define PINCFG_PACK(type, value)	(((value) << PINCFG_VALUE_SHIFT) | type)
+#define PINCFG_UNPACK_TYPE(cfg)		((cfg) & PINCFG_TYPE_MASK)
+#define PINCFG_UNPACK_VALUE(cfg)	(((cfg) & PINCFG_VALUE_MASK) >> \
+						PINCFG_VALUE_SHIFT)
+/**
+ * enum eint_type - possible external interrupt types.
+ * @EINT_TYPE_NONE: bank does not support external interrupts
+ * @EINT_TYPE_GPIO: bank supportes external gpio interrupts
+ * @EINT_TYPE_WKUP: bank supportes external wakeup interrupts
+ * @EINT_TYPE_WKUP_MUX: bank supports multiplexed external wakeup interrupts
+ *
+ * Samsung GPIO controller groups all the available pins into banks. The pins
+ * in a pin bank can support external gpio interrupts or external wakeup
+ * interrupts or no interrupts at all. From a software perspective, the only
+ * difference between external gpio and external wakeup interrupts is that
+ * the wakeup interrupts can additionally wakeup the system if it is in
+ * suspended state.
+ */
+enum eint_type {
+	EINT_TYPE_NONE,
+	EINT_TYPE_GPIO,
+	EINT_TYPE_WKUP,
+	EINT_TYPE_WKUP_MUX,
+};
+
+/* maximum length of a pin in pin descriptor (example: "gpa0-0") */
+#define PIN_NAME_LENGTH	10
+
+#define PIN_GROUP(n, p, f)				\
+	{						\
+		.name		= n,			\
+		.pins		= p,			\
+		.num_pins	= ARRAY_SIZE(p),	\
+		.func		= f			\
+	}
+
+#define PMX_FUNC(n, g)					\
+	{						\
+		.name		= n,			\
+		.groups		= g,			\
+		.num_groups	= ARRAY_SIZE(g),	\
+	}
+
+struct samsung_pinctrl_drv_data;
+
+/**
+ * struct samsung_pin_bank_type: pin bank type description
+ * @fld_width: widths of configuration bitfields (0 if unavailable)
+ * @reg_offset: offsets of configuration registers (don't care of width is 0)
+ */
+struct samsung_pin_bank_type {
+	u8 fld_width[PINCFG_TYPE_NUM];
+	u8 reg_offset[PINCFG_TYPE_NUM];
+};
+
+/**
+ * struct samsung_pin_bank: represent a controller pin-bank.
+ * @type: type of the bank (register offsets and bitfield widths)
+ * @pctl_offset: starting offset of the pin-bank registers.
+ * @pin_base: starting pin number of the bank.
+ * @nr_pins: number of pins included in this bank.
+ * @eint_func: function to set in CON register to configure pin as EINT.
+ * @eint_type: type of the external interrupt supported by the bank.
+ * @eint_mask: bit mask of pins which support EINT function.
+ * @name: name to be prefixed for each pin in this pin bank.
+ * @of_node: OF node of the bank.
+ * @drvdata: link to controller driver data
+ * @irq_domain: IRQ domain of the bank.
+ * @gpio_chip: GPIO chip of the bank.
+ * @grange: linux gpio pin range supported by this bank.
+ * @slock: spinlock protecting bank registers
+ * @pm_save: saved register values during suspend
+ */
+struct samsung_pin_bank {
+	struct samsung_pin_bank_type *type;
+	u32		pctl_offset;
+	u32		pin_base;
+	u8		nr_pins;
+	u8		eint_func;
+	enum eint_type	eint_type;
+	u32		eint_mask;
+	u32		eint_offset;
+	char		*name;
+	void		*soc_priv;
+	struct device_node *of_node;
+	struct samsung_pinctrl_drv_data *drvdata;
+	struct irq_domain *irq_domain;
+	struct gpio_chip gpio_chip;
+	struct pinctrl_gpio_range grange;
+	spinlock_t slock;
+
+	u32 pm_save[PINCFG_TYPE_NUM + 1]; /* +1 to handle double CON registers*/
+};
+
+/**
+ * struct samsung_pin_ctrl: represent a pin controller.
+ * @pin_banks: list of pin banks included in this controller.
+ * @nr_banks: number of pin banks.
+ * @base: starting system wide pin number.
+ * @nr_pins: number of pins supported by the controller.
+ * @eint_gpio_init: platform specific callback to setup the external gpio
+ *	interrupts for the controller.
+ * @eint_wkup_init: platform specific callback to setup the external wakeup
+ *	interrupts for the controller.
+ * @label: for debug information.
+ */
+struct samsung_pin_ctrl {
+	struct samsung_pin_bank	*pin_banks;
+	u32		nr_banks;
+
+	u32		base;
+	u32		nr_pins;
+
+	int		(*eint_gpio_init)(struct samsung_pinctrl_drv_data *);
+	int		(*eint_wkup_init)(struct samsung_pinctrl_drv_data *);
+	void		(*suspend)(struct samsung_pinctrl_drv_data *);
+	void		(*resume)(struct samsung_pinctrl_drv_data *);
+
+	char		*label;
+};
+
+/**
+ * struct samsung_pinctrl_drv_data: wrapper for holding driver data together.
+ * @node: global list node
+ * @virt_base: register base address of the controller.
+ * @dev: device instance representing the controller.
+ * @irq: interrpt number used by the controller to notify gpio interrupts.
+ * @ctrl: pin controller instance managed by the driver.
+ * @pctl: pin controller descriptor registered with the pinctrl subsystem.
+ * @pctl_dev: cookie representing pinctrl device instance.
+ * @pin_groups: list of pin groups available to the driver.
+ * @nr_groups: number of such pin groups.
+ * @pmx_functions: list of pin functions available to the driver.
+ * @nr_function: number of such pin functions.
+ */
+struct samsung_pinctrl_drv_data {
+	struct list_head		node;
+	void __iomem			*virt_base;
+	struct device			*dev;
+	int				irq;
+
+	struct samsung_pin_ctrl		*ctrl;
+	struct pinctrl_desc		pctl;
+	struct pinctrl_dev		*pctl_dev;
+
+	const struct samsung_pin_group	*pin_groups;
+	unsigned int			nr_groups;
+	const struct samsung_pmx_func	*pmx_functions;
+	unsigned int			nr_functions;
+};
+
+/**
+ * struct samsung_pin_group: represent group of pins of a pinmux function.
+ * @name: name of the pin group, used to lookup the group.
+ * @pins: the pins included in this group.
+ * @num_pins: number of pins included in this group.
+ * @func: the function number to be programmed when selected.
+ */
+struct samsung_pin_group {
+	const char		*name;
+	const unsigned int	*pins;
+	u8			num_pins;
+	u8			func;
+};
+
+/**
+ * struct samsung_pmx_func: represent a pin function.
+ * @name: name of the pin function, used to lookup the function.
+ * @groups: one or more names of pin groups that provide this function.
+ * @num_groups: number of groups included in @groups.
+ */
+struct samsung_pmx_func {
+	const char		*name;
+	const char		**groups;
+	u8			num_groups;
+	u32			val;
+};
+
+/* list of all exported SoC specific data */
+extern struct samsung_pin_ctrl exynos3250_pin_ctrl[];
+extern struct samsung_pin_ctrl exynos4210_pin_ctrl[];
+extern struct samsung_pin_ctrl exynos4x12_pin_ctrl[];
+extern struct samsung_pin_ctrl exynos5250_pin_ctrl[];
+extern struct samsung_pin_ctrl exynos5260_pin_ctrl[];
+extern struct samsung_pin_ctrl exynos5420_pin_ctrl[];
+extern struct samsung_pin_ctrl s3c64xx_pin_ctrl[];
+extern struct samsung_pin_ctrl s3c2412_pin_ctrl[];
+extern struct samsung_pin_ctrl s3c2416_pin_ctrl[];
+extern struct samsung_pin_ctrl s3c2440_pin_ctrl[];
+extern struct samsung_pin_ctrl s3c2450_pin_ctrl[];
+extern struct samsung_pin_ctrl s5pv210_pin_ctrl[];
+
+#endif /* __PINCTRL_SAMSUNG_H */