ARM: 5969/1: nomadik: move gpio to plat-nomadik

Move the Nomadik GPIO driver to plat-nomadik so that it can also be used
on the Ux500 platform.

The mach-nomadik include/mach/gpio.h is replaced by one that includes
the one now in plat-nomadik, so that code doesn't need to include the
one in plat specifically, and can instead use <linux/gpio.h> as usual.

Acked-by: Alessandro Rubini <rubini@unipv.it>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

4 files changed, 3 insertions, 463 deletions

diff --git a/arch/arm/mach-nomadik/Kconfig b/arch/arm/mach-nomadik/Kconfig
index 3c5e0f5..71f3ea6 100644
--- a/arch/arm/mach-nomadik/Kconfig
+++ b/arch/arm/mach-nomadik/Kconfig
@@ -6,6 +6,7 @@ config MACH_NOMADIK_8815NHK
 	bool "ST 8815 Nomadik Hardware Kit (evaluation board)"
 	select NOMADIK_8815
 	select HAS_MTU
+	select NOMADIK_GPIO
 
 endmenu
 
diff --git a/arch/arm/mach-nomadik/Makefile b/arch/arm/mach-nomadik/Makefile
index 36f67fb..a6bbd1a 100644
--- a/arch/arm/mach-nomadik/Makefile
+++ b/arch/arm/mach-nomadik/Makefile
@@ -7,7 +7,7 @@
 
 # Object file lists.
 
-obj-y			+= clock.o gpio.o
+obj-y			+= clock.o
 
 # Cpu revision
 obj-$(CONFIG_NOMADIK_8815) += cpu-8815.o
diff --git a/arch/arm/mach-nomadik/gpio.c b/arch/arm/mach-nomadik/gpio.c
deleted file mode 100644
index 9a09b27..0000000
--- a/arch/arm/mach-nomadik/gpio.c
+++ /dev/null
@@ -1,396 +0,0 @@
-/*
- * Generic GPIO driver for logic cells found in the Nomadik SoC
- *
- * Copyright (C) 2008,2009 STMicroelectronics
- * Copyright (C) 2009 Alessandro Rubini <rubini@unipv.it>
- *   Rewritten based on work by Prafulla WADASKAR <prafulla.wadaskar@st.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/device.h>
-#include <linux/amba/bus.h>
-#include <linux/io.h>
-#include <linux/gpio.h>
-#include <linux/spinlock.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-
-#include <mach/hardware.h>
-#include <mach/gpio.h>
-
-/*
- * The GPIO module in the Nomadik family of Systems-on-Chip is an
- * AMBA device, managing 32 pins and alternate functions.  The logic block
- * is currently only used in the Nomadik.
- *
- * Symbols in this file are called "nmk_gpio" for "nomadik gpio"
- */
-
-#define NMK_GPIO_PER_CHIP 32
-struct nmk_gpio_chip {
-	struct gpio_chip chip;
-	void __iomem *addr;
-	unsigned int parent_irq;
-	spinlock_t *lock;
-	/* Keep track of configured edges */
-	u32 edge_rising;
-	u32 edge_falling;
-};
-
-/* Mode functions */
-int nmk_gpio_set_mode(int gpio, int gpio_mode)
-{
-	struct nmk_gpio_chip *nmk_chip;
-	unsigned long flags;
-	u32 afunc, bfunc, bit;
-
-	nmk_chip = get_irq_chip_data(NOMADIK_GPIO_TO_IRQ(gpio));
-	if (!nmk_chip)
-		return -EINVAL;
-
-	bit = 1 << (gpio - nmk_chip->chip.base);
-
-	spin_lock_irqsave(&nmk_chip->lock, flags);
-	afunc = readl(nmk_chip->addr + NMK_GPIO_AFSLA) & ~bit;
-	bfunc = readl(nmk_chip->addr + NMK_GPIO_AFSLB) & ~bit;
-	if (gpio_mode & NMK_GPIO_ALT_A)
-		afunc |= bit;
-	if (gpio_mode & NMK_GPIO_ALT_B)
-		bfunc |= bit;
-	writel(afunc, nmk_chip->addr + NMK_GPIO_AFSLA);
-	writel(bfunc, nmk_chip->addr + NMK_GPIO_AFSLB);
-	spin_unlock_irqrestore(&nmk_chip->lock, flags);
-
-	return 0;
-}
-EXPORT_SYMBOL(nmk_gpio_set_mode);
-
-int nmk_gpio_get_mode(int gpio)
-{
-	struct nmk_gpio_chip *nmk_chip;
-	u32 afunc, bfunc, bit;
-
-	nmk_chip = get_irq_chip_data(NOMADIK_GPIO_TO_IRQ(gpio));
-	if (!nmk_chip)
-		return -EINVAL;
-
-	bit = 1 << (gpio - nmk_chip->chip.base);
-
-	afunc = readl(nmk_chip->addr + NMK_GPIO_AFSLA) & bit;
-	bfunc = readl(nmk_chip->addr + NMK_GPIO_AFSLB) & bit;
-
-	return (afunc ? NMK_GPIO_ALT_A : 0) | (bfunc ? NMK_GPIO_ALT_B : 0);
-}
-EXPORT_SYMBOL(nmk_gpio_get_mode);
-
-
-/* IRQ functions */
-static inline int nmk_gpio_get_bitmask(int gpio)
-{
-	return 1 << (gpio % 32);
-}
-
-static void nmk_gpio_irq_ack(unsigned int irq)
-{
-	int gpio;
-	struct nmk_gpio_chip *nmk_chip;
-
-	gpio = NOMADIK_IRQ_TO_GPIO(irq);
-	nmk_chip = get_irq_chip_data(irq);
-	if (!nmk_chip)
-		return;
-	writel(nmk_gpio_get_bitmask(gpio), nmk_chip->addr + NMK_GPIO_IC);
-}
-
-static void nmk_gpio_irq_mask(unsigned int irq)
-{
-	int gpio;
-	struct nmk_gpio_chip *nmk_chip;
-	unsigned long flags;
-	u32 bitmask, reg;
-
-	gpio = NOMADIK_IRQ_TO_GPIO(irq);
-	nmk_chip = get_irq_chip_data(irq);
-	bitmask = nmk_gpio_get_bitmask(gpio);
-	if (!nmk_chip)
-		return;
-
-	/* we must individually clear the two edges */
-	spin_lock_irqsave(&nmk_chip->lock, flags);
-	if (nmk_chip->edge_rising & bitmask) {
-		reg = readl(nmk_chip->addr + NMK_GPIO_RWIMSC);
-		reg &= ~bitmask;
-		writel(reg, nmk_chip->addr + NMK_GPIO_RWIMSC);
-	}
-	if (nmk_chip->edge_falling & bitmask) {
-		reg = readl(nmk_chip->addr + NMK_GPIO_FWIMSC);
-		reg &= ~bitmask;
-		writel(reg, nmk_chip->addr + NMK_GPIO_FWIMSC);
-	}
-	spin_unlock_irqrestore(&nmk_chip->lock, flags);
-};
-
-static void nmk_gpio_irq_unmask(unsigned int irq)
-{
-	int gpio;
-	struct nmk_gpio_chip *nmk_chip;
-	unsigned long flags;
-	u32 bitmask, reg;
-
-	gpio = NOMADIK_IRQ_TO_GPIO(irq);
-	nmk_chip = get_irq_chip_data(irq);
-	bitmask = nmk_gpio_get_bitmask(gpio);
-	if (!nmk_chip)
-		return;
-
-	/* we must individually set the two edges */
-	spin_lock_irqsave(&nmk_chip->lock, flags);
-	if (nmk_chip->edge_rising & bitmask) {
-		reg = readl(nmk_chip->addr + NMK_GPIO_RWIMSC);
-		reg |= bitmask;
-		writel(reg, nmk_chip->addr + NMK_GPIO_RWIMSC);
-	}
-	if (nmk_chip->edge_falling & bitmask) {
-		reg = readl(nmk_chip->addr + NMK_GPIO_FWIMSC);
-		reg |= bitmask;
-		writel(reg, nmk_chip->addr + NMK_GPIO_FWIMSC);
-	}
-	spin_unlock_irqrestore(&nmk_chip->lock, flags);
-}
-
-static int nmk_gpio_irq_set_type(unsigned int irq, unsigned int type)
-{
-	int gpio;
-	struct nmk_gpio_chip *nmk_chip;
-	unsigned long flags;
-	u32 bitmask;
-
-	gpio = NOMADIK_IRQ_TO_GPIO(irq);
-	nmk_chip = get_irq_chip_data(irq);
-	bitmask = nmk_gpio_get_bitmask(gpio);
-	if (!nmk_chip)
-		return -EINVAL;
-
-	if (type & IRQ_TYPE_LEVEL_HIGH)
-		return -EINVAL;
-	if (type & IRQ_TYPE_LEVEL_LOW)
-		return -EINVAL;
-
-	spin_lock_irqsave(&nmk_chip->lock, flags);
-
-	nmk_chip->edge_rising &= ~bitmask;
-	if (type & IRQ_TYPE_EDGE_RISING)
-		nmk_chip->edge_rising |= bitmask;
-	writel(nmk_chip->edge_rising, nmk_chip->addr + NMK_GPIO_RIMSC);
-
-	nmk_chip->edge_falling &= ~bitmask;
-	if (type & IRQ_TYPE_EDGE_FALLING)
-		nmk_chip->edge_falling |= bitmask;
-	writel(nmk_chip->edge_falling, nmk_chip->addr + NMK_GPIO_FIMSC);
-
-	spin_unlock_irqrestore(&nmk_chip->lock, flags);
-
-	nmk_gpio_irq_unmask(irq);
-
-	return 0;
-}
-
-static struct irq_chip nmk_gpio_irq_chip = {
-	.name		= "Nomadik-GPIO",
-	.ack		= nmk_gpio_irq_ack,
-	.mask		= nmk_gpio_irq_mask,
-	.unmask		= nmk_gpio_irq_unmask,
-	.set_type	= nmk_gpio_irq_set_type,
-};
-
-static void nmk_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
-{
-	struct nmk_gpio_chip *nmk_chip;
-	struct irq_chip *host_chip;
-	unsigned int gpio_irq;
-	u32 pending;
-	unsigned int first_irq;
-
-	nmk_chip = get_irq_data(irq);
-	first_irq = NOMADIK_GPIO_TO_IRQ(nmk_chip->chip.base);
-	while ( (pending = readl(nmk_chip->addr + NMK_GPIO_IS)) ) {
-		gpio_irq = first_irq + __ffs(pending);
-		generic_handle_irq(gpio_irq);
-	}
-	if (0) {/* don't ack parent irq, as ack == disable */
-		host_chip = get_irq_chip(irq);
-		host_chip->ack(irq);
-	}
-}
-
-static int nmk_gpio_init_irq(struct nmk_gpio_chip *nmk_chip)
-{
-	unsigned int first_irq;
-	int i;
-
-	first_irq = NOMADIK_GPIO_TO_IRQ(nmk_chip->chip.base);
-	for (i = first_irq; i < first_irq + NMK_GPIO_PER_CHIP; i++) {
-		set_irq_chip(i, &nmk_gpio_irq_chip);
-		set_irq_handler(i, handle_edge_irq);
-		set_irq_flags(i, IRQF_VALID);
-		set_irq_chip_data(i, nmk_chip);
-	}
-	set_irq_chained_handler(nmk_chip->parent_irq, nmk_gpio_irq_handler);
-	set_irq_data(nmk_chip->parent_irq, nmk_chip);
-	return 0;
-}
-
-/* I/O Functions */
-static int nmk_gpio_make_input(struct gpio_chip *chip, unsigned offset)
-{
-	struct nmk_gpio_chip *nmk_chip =
-		container_of(chip, struct nmk_gpio_chip, chip);
-
-	writel(1 << offset, nmk_chip->addr + NMK_GPIO_DIRC);
-	return 0;
-}
-
-static int nmk_gpio_make_output(struct gpio_chip *chip, unsigned offset,
-				int val)
-{
-	struct nmk_gpio_chip *nmk_chip =
-		container_of(chip, struct nmk_gpio_chip, chip);
-
-	writel(1 << offset, nmk_chip->addr + NMK_GPIO_DIRS);
-	return 0;
-}
-
-static int nmk_gpio_get_input(struct gpio_chip *chip, unsigned offset)
-{
-	struct nmk_gpio_chip *nmk_chip =
-		container_of(chip, struct nmk_gpio_chip, chip);
-	u32 bit = 1 << offset;
-
-	return (readl(nmk_chip->addr + NMK_GPIO_DAT) & bit) != 0;
-}
-
-static void nmk_gpio_set_output(struct gpio_chip *chip, unsigned offset,
-				int val)
-{
-	struct nmk_gpio_chip *nmk_chip =
-		container_of(chip, struct nmk_gpio_chip, chip);
-	u32 bit = 1 << offset;
-
-	if (val)
-		writel(bit, nmk_chip->addr + NMK_GPIO_DATS);
-	else
-		writel(bit, nmk_chip->addr + NMK_GPIO_DATC);
-}
-
-/* This structure is replicated for each GPIO block allocated at probe time */
-static struct gpio_chip nmk_gpio_template = {
-	.direction_input	= nmk_gpio_make_input,
-	.get			= nmk_gpio_get_input,
-	.direction_output	= nmk_gpio_make_output,
-	.set			= nmk_gpio_set_output,
-	.ngpio			= NMK_GPIO_PER_CHIP,
-	.can_sleep		= 0,
-};
-
-static int __init nmk_gpio_probe(struct amba_device *dev, struct amba_id *id)
-{
-	struct nmk_gpio_platform_data *pdata;
-	struct nmk_gpio_chip *nmk_chip;
-	struct gpio_chip *chip;
-	int ret;
-
-	pdata = dev->dev.platform_data;
-	ret = amba_request_regions(dev, pdata->name);
-	if (ret)
-		return ret;
-
-	nmk_chip = kzalloc(sizeof(*nmk_chip), GFP_KERNEL);
-	if (!nmk_chip) {
-		ret = -ENOMEM;
-		goto out_amba;
-	}
-	/*
-	 * The virt address in nmk_chip->addr is in the nomadik register space,
-	 * so we can simply convert the resource address, without remapping
-	 */
-	nmk_chip->addr = io_p2v(dev->res.start);
-	nmk_chip->chip = nmk_gpio_template;
-	nmk_chip->parent_irq = pdata->parent_irq;
-
-	chip = &nmk_chip->chip;
-	chip->base = pdata->first_gpio;
-	chip->label = pdata->name;
-	chip->dev = &dev->dev;
-	chip->owner = THIS_MODULE;
-
-	ret = gpiochip_add(&nmk_chip->chip);
-	if (ret)
-		goto out_free;
-
-	amba_set_drvdata(dev, nmk_chip);
-
-	nmk_gpio_init_irq(nmk_chip);
-
-	dev_info(&dev->dev, "Bits %i-%i at address %p\n",
-		 nmk_chip->chip.base, nmk_chip->chip.base+31, nmk_chip->addr);
-	return 0;
-
- out_free:
-	kfree(nmk_chip);
- out_amba:
-	amba_release_regions(dev);
-	dev_err(&dev->dev, "Failure %i for GPIO %i-%i\n", ret,
-		  pdata->first_gpio, pdata->first_gpio+31);
-	return ret;
-}
-
-static int nmk_gpio_remove(struct amba_device *dev)
-{
-	struct nmk_gpio_chip *nmk_chip;
-
-	nmk_chip = amba_get_drvdata(dev);
-	gpiochip_remove(&nmk_chip->chip);
-	kfree(nmk_chip);
-	amba_release_regions(dev);
-	return 0;
-}
-
-
-/* We have 0x1f080060 and 0x1f180060, accept both using the mask */
-static struct amba_id nmk_gpio_ids[] = {
-	{
-		.id	= 0x1f080060,
-		.mask	= 0xffefffff,
-	},
-	{0, 0},
-};
-
-static struct amba_driver nmk_gpio_driver = {
-	.drv = {
-		.owner = THIS_MODULE,
-		.name = "gpio",
-		},
-	.probe = nmk_gpio_probe,
-	.remove = nmk_gpio_remove,
-	.suspend = NULL, /* to be done */
-	.resume = NULL,
-	.id_table = nmk_gpio_ids,
-};
-
-static int __init nmk_gpio_init(void)
-{
-	return amba_driver_register(&nmk_gpio_driver);
-}
-
-arch_initcall(nmk_gpio_init);
-
-MODULE_AUTHOR("Prafulla WADASKAR and Alessandro Rubini");
-MODULE_DESCRIPTION("Nomadik GPIO Driver");
-MODULE_LICENSE("GPL");
-
-
diff --git a/arch/arm/mach-nomadik/include/mach/gpio.h b/arch/arm/mach-nomadik/include/mach/gpio.h
index 61577c9..7a81a04 100644
--- a/arch/arm/mach-nomadik/include/mach/gpio.h
+++ b/arch/arm/mach-nomadik/include/mach/gpio.h
@@ -1,71 +1,6 @@
-/*
- * Structures and registers for GPIO access in the Nomadik SoC
- *
- * Copyright (C) 2008 STMicroelectronics
- *     Author: Prafulla WADASKAR <prafulla.wadaskar@st.com>
- * Copyright (C) 2009 Alessandro Rubini <rubini@unipv.it>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
 #ifndef __ASM_ARCH_GPIO_H
 #define __ASM_ARCH_GPIO_H
 
-#include <asm-generic/gpio.h>
-
-/*
- * These currently cause a function call to happen, they may be optimized
- * if needed by adding cpu-specific defines to identify blocks
- * (see mach-pxa/include/mach/gpio.h as an example using GPLR etc)
- */
-#define gpio_get_value  __gpio_get_value
-#define gpio_set_value  __gpio_set_value
-#define gpio_cansleep   __gpio_cansleep
-#define gpio_to_irq     __gpio_to_irq
-
-/*
- * "nmk_gpio" and "NMK_GPIO" stand for "Nomadik GPIO", leaving
- * the "gpio" namespace for generic and cross-machine functions
- */
-
-/* Register in the logic block */
-#define NMK_GPIO_DAT	0x00
-#define NMK_GPIO_DATS	0x04
-#define NMK_GPIO_DATC	0x08
-#define NMK_GPIO_PDIS	0x0c
-#define NMK_GPIO_DIR	0x10
-#define NMK_GPIO_DIRS	0x14
-#define NMK_GPIO_DIRC	0x18
-#define NMK_GPIO_SLPC	0x1c
-#define NMK_GPIO_AFSLA	0x20
-#define NMK_GPIO_AFSLB	0x24
-
-#define NMK_GPIO_RIMSC	0x40
-#define NMK_GPIO_FIMSC	0x44
-#define NMK_GPIO_IS	0x48
-#define NMK_GPIO_IC	0x4c
-#define NMK_GPIO_RWIMSC	0x50
-#define NMK_GPIO_FWIMSC	0x54
-#define NMK_GPIO_WKS	0x58
-
-/* Alternate functions: function C is set in hw by setting both A and B */
-#define NMK_GPIO_ALT_GPIO	0
-#define NMK_GPIO_ALT_A	1
-#define NMK_GPIO_ALT_B	2
-#define NMK_GPIO_ALT_C	(NMK_GPIO_ALT_A | NMK_GPIO_ALT_B)
-
-extern int nmk_gpio_set_mode(int gpio, int gpio_mode);
-extern int nmk_gpio_get_mode(int gpio);
-
-/*
- * Platform data to register a block: only the initial gpio/irq number.
- */
-struct nmk_gpio_platform_data {
-	char *name;
-	int first_gpio;
-	int first_irq;
-	int parent_irq;
-};
+#include <plat/gpio.h>
 
 #endif /* __ASM_ARCH_GPIO_H */