mfd: DA9055 core driver

This is the DA9055 MFD core driver that instantiate all the dependent
component drivers and provides them the device access via I2C.

This patch is functionally tested on Samsung SMDK6410.

Signed-off-by: David Dajun Chen <dchen@diasemi.com>
Signed-off-by: Ashish Jangam <ashish.jangam@kpitcummins.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

4 files changed, 536 insertions, 0 deletions

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 84d6ea2..6bfa2a1 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -430,6 +430,23 @@ config MFD_DA9052_I2C
 	  for accessing the device, additional drivers must be enabled in
 	  order to use the functionality of the device.
 
+config MFD_DA9055
+	bool "Dialog Semiconductor DA9055 PMIC Support"
+	select REGMAP_I2C
+	select REGMAP_IRQ
+	select PMIC_DA9055
+	select MFD_CORE
+	depends on I2C=y
+	help
+	  Say yes here for support of Dialog Semiconductor DA9055. This is
+	  a Power Management IC. This driver provides common support for
+	  accessing the device as well as the I2C interface to the chip itself.
+	  Additional drivers must be enabled in order to use the functionality
+	  of the device.
+
+	  This driver can be built as a module. If built as a module it will be
+	  called "da9055"
+
 config PMIC_ADP5520
 	bool "Analog Devices ADP5520/01 MFD PMIC Core Support"
 	depends on I2C=y
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 083acf9..33c0e49 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -91,6 +91,9 @@ obj-$(CONFIG_MFD_DA9052_I2C)	+= da9052-i2c.o
 
 obj-$(CONFIG_MFD_LP8788)	+= lp8788.o lp8788-irq.o
 
+da9055-objs			:= da9055-core.o da9055-i2c.o
+obj-$(CONFIG_MFD_DA9055)	+= da9055.o
+
 obj-$(CONFIG_MFD_MAX77686)	+= max77686.o max77686-irq.o
 obj-$(CONFIG_MFD_MAX77693)	+= max77693.o max77693-irq.o
 obj-$(CONFIG_MFD_MAX8907)	+= max8907.o
diff --git a/drivers/mfd/da9055-core.c b/drivers/mfd/da9055-core.c
new file mode 100644
index 0000000..ff6c77f3
--- /dev/null
+++ b/drivers/mfd/da9055-core.c
@@ -0,0 +1,423 @@
+/*
+ * Device access for Dialog DA9055 PMICs.
+ *
+ * Copyright(c) 2012 Dialog Semiconductor Ltd.
+ *
+ * Author: David Dajun Chen <dchen@diasemi.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/device.h>
+#include <linux/input.h>
+#include <linux/irq.h>
+#include <linux/mutex.h>
+
+#include <linux/mfd/core.h>
+#include <linux/mfd/da9055/core.h>
+#include <linux/mfd/da9055/pdata.h>
+#include <linux/mfd/da9055/reg.h>
+
+#define DA9055_IRQ_NONKEY_MASK		0x01
+#define DA9055_IRQ_ALM_MASK		0x02
+#define DA9055_IRQ_TICK_MASK		0x04
+#define DA9055_IRQ_ADC_MASK		0x08
+#define DA9055_IRQ_BUCK_ILIM_MASK	0x08
+
+static bool da9055_register_readable(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case DA9055_REG_STATUS_A:
+	case DA9055_REG_STATUS_B:
+	case DA9055_REG_EVENT_A:
+	case DA9055_REG_EVENT_B:
+	case DA9055_REG_EVENT_C:
+	case DA9055_REG_IRQ_MASK_A:
+	case DA9055_REG_IRQ_MASK_B:
+	case DA9055_REG_IRQ_MASK_C:
+
+	case DA9055_REG_CONTROL_A:
+	case DA9055_REG_CONTROL_B:
+	case DA9055_REG_CONTROL_C:
+	case DA9055_REG_CONTROL_D:
+	case DA9055_REG_CONTROL_E:
+
+	case DA9055_REG_ADC_MAN:
+	case DA9055_REG_ADC_CONT:
+	case DA9055_REG_VSYS_MON:
+	case DA9055_REG_ADC_RES_L:
+	case DA9055_REG_ADC_RES_H:
+	case DA9055_REG_VSYS_RES:
+	case DA9055_REG_ADCIN1_RES:
+	case DA9055_REG_ADCIN2_RES:
+	case DA9055_REG_ADCIN3_RES:
+
+	case DA9055_REG_COUNT_S:
+	case DA9055_REG_COUNT_MI:
+	case DA9055_REG_COUNT_H:
+	case DA9055_REG_COUNT_D:
+	case DA9055_REG_COUNT_MO:
+	case DA9055_REG_COUNT_Y:
+	case DA9055_REG_ALARM_H:
+	case DA9055_REG_ALARM_D:
+	case DA9055_REG_ALARM_MI:
+	case DA9055_REG_ALARM_MO:
+	case DA9055_REG_ALARM_Y:
+
+	case DA9055_REG_GPIO0_1:
+	case DA9055_REG_GPIO2:
+	case DA9055_REG_GPIO_MODE0_2:
+
+	case DA9055_REG_BCORE_CONT:
+	case DA9055_REG_BMEM_CONT:
+	case DA9055_REG_LDO1_CONT:
+	case DA9055_REG_LDO2_CONT:
+	case DA9055_REG_LDO3_CONT:
+	case DA9055_REG_LDO4_CONT:
+	case DA9055_REG_LDO5_CONT:
+	case DA9055_REG_LDO6_CONT:
+	case DA9055_REG_BUCK_LIM:
+	case DA9055_REG_BCORE_MODE:
+	case DA9055_REG_VBCORE_A:
+	case DA9055_REG_VBMEM_A:
+	case DA9055_REG_VLDO1_A:
+	case DA9055_REG_VLDO2_A:
+	case DA9055_REG_VLDO3_A:
+	case DA9055_REG_VLDO4_A:
+	case DA9055_REG_VLDO5_A:
+	case DA9055_REG_VLDO6_A:
+	case DA9055_REG_VBCORE_B:
+	case DA9055_REG_VBMEM_B:
+	case DA9055_REG_VLDO1_B:
+	case DA9055_REG_VLDO2_B:
+	case DA9055_REG_VLDO3_B:
+	case DA9055_REG_VLDO4_B:
+	case DA9055_REG_VLDO5_B:
+	case DA9055_REG_VLDO6_B:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static bool da9055_register_writeable(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case DA9055_REG_STATUS_A:
+	case DA9055_REG_STATUS_B:
+	case DA9055_REG_EVENT_A:
+	case DA9055_REG_EVENT_B:
+	case DA9055_REG_EVENT_C:
+	case DA9055_REG_IRQ_MASK_A:
+	case DA9055_REG_IRQ_MASK_B:
+	case DA9055_REG_IRQ_MASK_C:
+
+	case DA9055_REG_CONTROL_A:
+	case DA9055_REG_CONTROL_B:
+	case DA9055_REG_CONTROL_C:
+	case DA9055_REG_CONTROL_D:
+	case DA9055_REG_CONTROL_E:
+
+	case DA9055_REG_ADC_MAN:
+	case DA9055_REG_ADC_CONT:
+	case DA9055_REG_VSYS_MON:
+	case DA9055_REG_ADC_RES_L:
+	case DA9055_REG_ADC_RES_H:
+	case DA9055_REG_VSYS_RES:
+	case DA9055_REG_ADCIN1_RES:
+	case DA9055_REG_ADCIN2_RES:
+	case DA9055_REG_ADCIN3_RES:
+
+	case DA9055_REG_COUNT_S:
+	case DA9055_REG_COUNT_MI:
+	case DA9055_REG_COUNT_H:
+	case DA9055_REG_COUNT_D:
+	case DA9055_REG_COUNT_MO:
+	case DA9055_REG_COUNT_Y:
+	case DA9055_REG_ALARM_H:
+	case DA9055_REG_ALARM_D:
+	case DA9055_REG_ALARM_MI:
+	case DA9055_REG_ALARM_MO:
+	case DA9055_REG_ALARM_Y:
+
+	case DA9055_REG_GPIO0_1:
+	case DA9055_REG_GPIO2:
+	case DA9055_REG_GPIO_MODE0_2:
+
+	case DA9055_REG_BCORE_CONT:
+	case DA9055_REG_BMEM_CONT:
+	case DA9055_REG_LDO1_CONT:
+	case DA9055_REG_LDO2_CONT:
+	case DA9055_REG_LDO3_CONT:
+	case DA9055_REG_LDO4_CONT:
+	case DA9055_REG_LDO5_CONT:
+	case DA9055_REG_LDO6_CONT:
+	case DA9055_REG_BUCK_LIM:
+	case DA9055_REG_BCORE_MODE:
+	case DA9055_REG_VBCORE_A:
+	case DA9055_REG_VBMEM_A:
+	case DA9055_REG_VLDO1_A:
+	case DA9055_REG_VLDO2_A:
+	case DA9055_REG_VLDO3_A:
+	case DA9055_REG_VLDO4_A:
+	case DA9055_REG_VLDO5_A:
+	case DA9055_REG_VLDO6_A:
+	case DA9055_REG_VBCORE_B:
+	case DA9055_REG_VBMEM_B:
+	case DA9055_REG_VLDO1_B:
+	case DA9055_REG_VLDO2_B:
+	case DA9055_REG_VLDO3_B:
+	case DA9055_REG_VLDO4_B:
+	case DA9055_REG_VLDO5_B:
+	case DA9055_REG_VLDO6_B:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static bool da9055_register_volatile(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case DA9055_REG_STATUS_A:
+	case DA9055_REG_STATUS_B:
+	case DA9055_REG_EVENT_A:
+	case DA9055_REG_EVENT_B:
+	case DA9055_REG_EVENT_C:
+
+	case DA9055_REG_CONTROL_A:
+	case DA9055_REG_CONTROL_E:
+
+	case DA9055_REG_ADC_MAN:
+	case DA9055_REG_ADC_RES_L:
+	case DA9055_REG_ADC_RES_H:
+	case DA9055_REG_VSYS_RES:
+	case DA9055_REG_ADCIN1_RES:
+	case DA9055_REG_ADCIN2_RES:
+	case DA9055_REG_ADCIN3_RES:
+
+	case DA9055_REG_COUNT_S:
+	case DA9055_REG_COUNT_MI:
+	case DA9055_REG_COUNT_H:
+	case DA9055_REG_COUNT_D:
+	case DA9055_REG_COUNT_MO:
+	case DA9055_REG_COUNT_Y:
+	case DA9055_REG_ALARM_MI:
+
+	case DA9055_REG_BCORE_CONT:
+	case DA9055_REG_BMEM_CONT:
+	case DA9055_REG_LDO1_CONT:
+	case DA9055_REG_LDO2_CONT:
+	case DA9055_REG_LDO3_CONT:
+	case DA9055_REG_LDO4_CONT:
+	case DA9055_REG_LDO5_CONT:
+	case DA9055_REG_LDO6_CONT:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static struct regmap_irq da9055_irqs[] = {
+	[DA9055_IRQ_NONKEY] = {
+		.reg_offset = 0,
+		.mask = DA9055_IRQ_NONKEY_MASK,
+	},
+	[DA9055_IRQ_ALARM] = {
+		.reg_offset = 0,
+		.mask = DA9055_IRQ_ALM_MASK,
+	},
+	[DA9055_IRQ_TICK] = {
+		.reg_offset = 0,
+		.mask = DA9055_IRQ_TICK_MASK,
+	},
+	[DA9055_IRQ_HWMON] = {
+		.reg_offset = 0,
+		.mask = DA9055_IRQ_ADC_MASK,
+	},
+	[DA9055_IRQ_REGULATOR] = {
+		.reg_offset = 1,
+		.mask = DA9055_IRQ_BUCK_ILIM_MASK,
+	},
+};
+
+struct regmap_config da9055_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+
+	.cache_type = REGCACHE_RBTREE,
+
+	.max_register = DA9055_MAX_REGISTER_CNT,
+	.readable_reg = da9055_register_readable,
+	.writeable_reg = da9055_register_writeable,
+	.volatile_reg = da9055_register_volatile,
+};
+EXPORT_SYMBOL_GPL(da9055_regmap_config);
+
+static struct resource da9055_onkey_resource = {
+	.name = "ONKEY",
+	.start = DA9055_IRQ_NONKEY,
+	.end   = DA9055_IRQ_NONKEY,
+	.flags = IORESOURCE_IRQ,
+};
+
+static struct resource da9055_rtc_resource[] = {
+	{
+		.name = "ALM",
+		.start = DA9055_IRQ_ALARM,
+		.end   = DA9055_IRQ_ALARM,
+		.flags = IORESOURCE_IRQ,
+	},
+	{
+		.name = "TICK",
+		.start = DA9055_IRQ_TICK,
+		.end   = DA9055_IRQ_TICK,
+		.flags = IORESOURCE_IRQ,
+	},
+};
+
+static struct resource da9055_hwmon_resource = {
+	.name = "HWMON",
+	.start = DA9055_IRQ_HWMON,
+	.end   = DA9055_IRQ_HWMON,
+	.flags = IORESOURCE_IRQ,
+};
+
+static struct resource da9055_ld05_6_resource = {
+	.name = "REGULATOR",
+	.start = DA9055_IRQ_REGULATOR,
+	.end   = DA9055_IRQ_REGULATOR,
+	.flags = IORESOURCE_IRQ,
+};
+
+static struct mfd_cell da9055_devs[] = {
+	{
+		.of_compatible = "dialog,da9055-gpio",
+		.name = "da9055-gpio",
+	},
+	{
+		.of_compatible = "dialog,da9055-regulator",
+		.name = "da9055-regulator",
+		.id = 1,
+	},
+	{
+		.of_compatible = "dialog,da9055-regulator",
+		.name = "da9055-regulator",
+		.id = 2,
+	},
+	{
+		.of_compatible = "dialog,da9055-regulator",
+		.name = "da9055-regulator",
+		.id = 3,
+	},
+	{
+		.of_compatible = "dialog,da9055-regulator",
+		.name = "da9055-regulator",
+		.id = 4,
+	},
+	{
+		.of_compatible = "dialog,da9055-regulator",
+		.name = "da9055-regulator",
+		.id = 5,
+	},
+	{
+		.of_compatible = "dialog,da9055-regulator",
+		.name = "da9055-regulator",
+		.id = 6,
+	},
+	{
+		.of_compatible = "dialog,da9055-regulator",
+		.name = "da9055-regulator",
+		.id = 7,
+		.resources = &da9055_ld05_6_resource,
+		.num_resources = 1,
+	},
+	{
+		.of_compatible = "dialog,da9055-regulator",
+		.name = "da9055-regulator",
+		.resources = &da9055_ld05_6_resource,
+		.num_resources = 1,
+		.id = 8,
+	},
+	{
+		.of_compatible = "dialog,da9055-onkey",
+		.name = "da9055-onkey",
+		.resources = &da9055_onkey_resource,
+		.num_resources = 1,
+	},
+	{
+		.of_compatible = "dialog,da9055-rtc",
+		.name = "da9055-rtc",
+		.resources = da9055_rtc_resource,
+		.num_resources = ARRAY_SIZE(da9055_rtc_resource),
+	},
+	{
+		.of_compatible = "dialog,da9055-hwmon",
+		.name = "da9055-hwmon",
+		.resources = &da9055_hwmon_resource,
+		.num_resources = 1,
+	},
+	{
+		.of_compatible = "dialog,da9055-watchdog",
+		.name = "da9055-watchdog",
+	},
+};
+
+static struct regmap_irq_chip da9055_regmap_irq_chip = {
+	.name = "da9055_irq",
+	.status_base = DA9055_REG_EVENT_A,
+	.mask_base = DA9055_REG_IRQ_MASK_A,
+	.ack_base = DA9055_REG_EVENT_A,
+	.num_regs = 3,
+	.irqs = da9055_irqs,
+	.num_irqs = ARRAY_SIZE(da9055_irqs),
+};
+
+int __devinit da9055_device_init(struct da9055 *da9055)
+{
+	struct da9055_pdata *pdata = da9055->dev->platform_data;
+	int ret;
+
+	if (pdata && pdata->init != NULL)
+		pdata->init(da9055);
+
+	if (!pdata || !pdata->irq_base)
+		da9055->irq_base = -1;
+	else
+		da9055->irq_base = pdata->irq_base;
+
+	ret = regmap_add_irq_chip(da9055->regmap, da9055->chip_irq,
+				  IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
+				  da9055->irq_base, &da9055_regmap_irq_chip,
+				  &da9055->irq_data);
+	if (ret < 0)
+		return ret;
+
+	da9055->irq_base = regmap_irq_chip_get_base(da9055->irq_data);
+
+	ret = mfd_add_devices(da9055->dev, -1,
+			      da9055_devs, ARRAY_SIZE(da9055_devs),
+			      NULL, da9055->irq_base, NULL);
+	if (ret)
+		goto err;
+
+	return 0;
+
+err:
+	mfd_remove_devices(da9055->dev);
+	return ret;
+}
+
+void __devexit da9055_device_exit(struct da9055 *da9055)
+{
+	regmap_del_irq_chip(da9055->chip_irq, da9055->irq_data);
+	mfd_remove_devices(da9055->dev);
+}
+
+MODULE_DESCRIPTION("Core support for the DA9055 PMIC");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
diff --git a/drivers/mfd/da9055-i2c.c b/drivers/mfd/da9055-i2c.c
new file mode 100644
index 0000000..88f6dca
--- /dev/null
+++ b/drivers/mfd/da9055-i2c.c
@@ -0,0 +1,93 @@
+ /* I2C access for DA9055 PMICs.
+ *
+ * Copyright(c) 2012 Dialog Semiconductor Ltd.
+ *
+ * Author: David Dajun Chen <dchen@diasemi.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/device.h>
+#include <linux/i2c.h>
+#include <linux/err.h>
+
+#include <linux/mfd/da9055/core.h>
+
+static int __devinit da9055_i2c_probe(struct i2c_client *i2c,
+				      const struct i2c_device_id *id)
+{
+	struct da9055 *da9055;
+	int ret;
+
+	da9055 = devm_kzalloc(&i2c->dev, sizeof(struct da9055), GFP_KERNEL);
+	if (!da9055)
+		return -ENOMEM;
+
+	da9055->regmap = devm_regmap_init_i2c(i2c, &da9055_regmap_config);
+	if (IS_ERR(da9055->regmap)) {
+		ret = PTR_ERR(da9055->regmap);
+		dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
+			ret);
+		return ret;
+	}
+
+	da9055->dev = &i2c->dev;
+	da9055->chip_irq = i2c->irq;
+
+	i2c_set_clientdata(i2c, da9055);
+
+	return da9055_device_init(da9055);
+}
+
+static int __devexit da9055_i2c_remove(struct i2c_client *i2c)
+{
+	struct da9055 *da9055 = i2c_get_clientdata(i2c);
+
+	da9055_device_exit(da9055);
+
+	return 0;
+}
+
+static struct i2c_device_id da9055_i2c_id[] = {
+	{"da9055-pmic", 0},
+	{ }
+};
+
+static struct i2c_driver da9055_i2c_driver = {
+	.probe = da9055_i2c_probe,
+	.remove = __devexit_p(da9055_i2c_remove),
+	.id_table = da9055_i2c_id,
+	.driver = {
+		.name = "da9055",
+		.owner = THIS_MODULE,
+	},
+};
+
+static int __init da9055_i2c_init(void)
+{
+	int ret;
+
+	ret = i2c_add_driver(&da9055_i2c_driver);
+	if (ret != 0) {
+		pr_err("DA9055 I2C registration failed %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+subsys_initcall(da9055_i2c_init);
+
+static void __exit da9055_i2c_exit(void)
+{
+	i2c_del_driver(&da9055_i2c_driver);
+}
+module_exit(da9055_i2c_exit);
+
+MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
+MODULE_DESCRIPTION("I2C driver for Dialog DA9055 PMIC");
+MODULE_LICENSE("GPL");