drivers/mfd/max77693.c - linux - Git at Google

 /*
  * max77693.c - mfd core driver for the MAX 77693
  *
  * Copyright (C) 2012 Samsung Electronics
  * SangYoung Son <hello.son@smasung.com>
  *
  * This program is not provided / owned by Maxim Integrated Products.
  *
  * 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 program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  *
  * This driver is based on max8997.c
  */

 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/i2c.h>
 #include <linux/err.h>
 #include <linux/interrupt.h>
 #include <linux/of.h>
 #include <linux/pm_runtime.h>
 #include <linux/mutex.h>
 #include <linux/mfd/core.h>
 #include <linux/mfd/max77693.h>
 #include <linux/mfd/max77693-private.h>
 #include <linux/regulator/machine.h>
 #include <linux/regmap.h>

 #define I2C_ADDR_PMIC	(0xCC >> 1)	/* Charger, Flash LED */
 #define I2C_ADDR_MUIC	(0x4A >> 1)
 #define I2C_ADDR_HAPTIC	(0x90 >> 1)

 static const struct mfd_cell max77693_devs[] = {
 	{ .name = "max77693-pmic", },
 	{ .name = "max77693-charger", },
 	{ .name = "max77693-flash", },
 	{ .name = "max77693-muic", },
 	{ .name = "max77693-haptic", },
 };

 int max77693_read_reg(struct regmap *map, u8 reg, u8 *dest)
 {
 	unsigned int val;
 	int ret;

 	ret = regmap_read(map, reg, &val);
 	*dest = val;

 	return ret;
 }
 EXPORT_SYMBOL_GPL(max77693_read_reg);

 int max77693_bulk_read(struct regmap *map, u8 reg, int count, u8 *buf)
 {
 	int ret;

 	ret = regmap_bulk_read(map, reg, buf, count);

 	return ret;
 }
 EXPORT_SYMBOL_GPL(max77693_bulk_read);

 int max77693_write_reg(struct regmap *map, u8 reg, u8 value)
 {
 	int ret;

 	ret = regmap_write(map, reg, value);

 	return ret;
 }
 EXPORT_SYMBOL_GPL(max77693_write_reg);

 int max77693_bulk_write(struct regmap *map, u8 reg, int count, u8 *buf)
 {
 	int ret;

 	ret = regmap_bulk_write(map, reg, buf, count);

 	return ret;
 }
 EXPORT_SYMBOL_GPL(max77693_bulk_write);

 int max77693_update_reg(struct regmap *map, u8 reg, u8 val, u8 mask)
 {
 	int ret;

 	ret = regmap_update_bits(map, reg, mask, val);

 	return ret;
 }
 EXPORT_SYMBOL_GPL(max77693_update_reg);

 static const struct regmap_config max77693_regmap_config = {
 	.reg_bits = 8,
 	.val_bits = 8,
 	.max_register = MAX77693_PMIC_REG_END,
 };

 static const struct regmap_config max77693_regmap_muic_config = {
 	.reg_bits = 8,
 	.val_bits = 8,
 	.max_register = MAX77693_MUIC_REG_END,
 };

 static int max77693_i2c_probe(struct i2c_client *i2c,
 			      const struct i2c_device_id *id)
 {
 	struct max77693_dev *max77693;
 	u8 reg_data;
 	int ret = 0;

 	max77693 = devm_kzalloc(&i2c->dev,
 			sizeof(struct max77693_dev), GFP_KERNEL);
 	if (max77693 == NULL)
 		return -ENOMEM;

 	i2c_set_clientdata(i2c, max77693);
 	max77693->dev = &i2c->dev;
 	max77693->i2c = i2c;
 	max77693->irq = i2c->irq;
 	max77693->type = id->driver_data;

 	max77693->regmap = devm_regmap_init_i2c(i2c, &max77693_regmap_config);
 	if (IS_ERR(max77693->regmap)) {
 		ret = PTR_ERR(max77693->regmap);
 		dev_err(max77693->dev, "failed to allocate register map: %d\n",
 				ret);
 		return ret;
 	}

 	ret = max77693_read_reg(max77693->regmap, MAX77693_PMIC_REG_PMIC_ID2,
 				&reg_data);
 	if (ret < 0) {
 		dev_err(max77693->dev, "device not found on this channel\n");
 		return ret;
 	} else
 		dev_info(max77693->dev, "device ID: 0x%x\n", reg_data);

 	max77693->muic = i2c_new_dummy(i2c->adapter, I2C_ADDR_MUIC);
 	if (!max77693->muic) {
 		dev_err(max77693->dev, "Failed to allocate I2C device for MUIC\n");
 		return -ENODEV;
 	}
 	i2c_set_clientdata(max77693->muic, max77693);

 	max77693->haptic = i2c_new_dummy(i2c->adapter, I2C_ADDR_HAPTIC);
 	if (!max77693->haptic) {
 		dev_err(max77693->dev, "Failed to allocate I2C device for Haptic\n");
 		ret = -ENODEV;
 		goto err_i2c_haptic;
 	}
 	i2c_set_clientdata(max77693->haptic, max77693);

 	/*
 	 * Initialize register map for MUIC device because use regmap-muic
 	 * instance of MUIC device when irq of max77693 is initialized
 	 * before call max77693-muic probe() function.
 	 */
 	max77693->regmap_muic = devm_regmap_init_i2c(max77693->muic,
 					 &max77693_regmap_muic_config);
 	if (IS_ERR(max77693->regmap_muic)) {
 		ret = PTR_ERR(max77693->regmap_muic);
 		dev_err(max77693->dev,
 			"failed to allocate register map: %d\n", ret);
 		goto err_regmap_muic;
 	}

 	ret = max77693_irq_init(max77693);
 	if (ret < 0)
 		goto err_irq;

 	pm_runtime_set_active(max77693->dev);

 	ret = mfd_add_devices(max77693->dev, -1, max77693_devs,
 			      ARRAY_SIZE(max77693_devs), NULL, 0, NULL);
 	if (ret < 0)
 		goto err_mfd;

 	return ret;

 err_mfd:
 	max77693_irq_exit(max77693);
 err_irq:
 err_regmap_muic:
 	i2c_unregister_device(max77693->haptic);
 err_i2c_haptic:
 	i2c_unregister_device(max77693->muic);
 	return ret;
 }

 static int max77693_i2c_remove(struct i2c_client *i2c)
 {
 	struct max77693_dev *max77693 = i2c_get_clientdata(i2c);

 	mfd_remove_devices(max77693->dev);
 	max77693_irq_exit(max77693);
 	i2c_unregister_device(max77693->muic);
 	i2c_unregister_device(max77693->haptic);

 	return 0;
 }

 static const struct i2c_device_id max77693_i2c_id[] = {
 	{ "max77693", TYPE_MAX77693 },
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, max77693_i2c_id);

 static int max77693_suspend(struct device *dev)
 {
 	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
 	struct max77693_dev *max77693 = i2c_get_clientdata(i2c);

 	if (device_may_wakeup(dev))
 		irq_set_irq_wake(max77693->irq, 1);
 	return 0;
 }

 static int max77693_resume(struct device *dev)
 {
 	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
 	struct max77693_dev *max77693 = i2c_get_clientdata(i2c);

 	if (device_may_wakeup(dev))
 		irq_set_irq_wake(max77693->irq, 0);
 	return max77693_irq_resume(max77693);
 }

 static const struct dev_pm_ops max77693_pm = {
 	.suspend = max77693_suspend,
 	.resume = max77693_resume,
 };

 #ifdef CONFIG_OF
 static const struct of_device_id max77693_dt_match[] = {
 	{ .compatible = "maxim,max77693" },
 	{},
 };
 #endif

 static struct i2c_driver max77693_i2c_driver = {
 	.driver = {
 		   .name = "max77693",
 		   .owner = THIS_MODULE,
 		   .pm = &max77693_pm,
 		   .of_match_table = of_match_ptr(max77693_dt_match),
 	},
 	.probe = max77693_i2c_probe,
 	.remove = max77693_i2c_remove,
 	.id_table = max77693_i2c_id,
 };

 static int __init max77693_i2c_init(void)
 {
 	return i2c_add_driver(&max77693_i2c_driver);
 }
 /* init early so consumer devices can complete system boot */
 subsys_initcall(max77693_i2c_init);

 static void __exit max77693_i2c_exit(void)
 {
 	i2c_del_driver(&max77693_i2c_driver);
 }
 module_exit(max77693_i2c_exit);

 MODULE_DESCRIPTION("MAXIM 77693 multi-function core driver");
 MODULE_AUTHOR("SangYoung, Son <hello.son@samsung.com>");
 MODULE_LICENSE("GPL");
	/*
	* max77693.c - mfd core driver for the MAX 77693
	*
	* Copyright (C) 2012 Samsung Electronics
	* SangYoung Son <hello.son@smasung.com>
	*
	* This program is not provided / owned by Maxim Integrated Products.
	*
	* 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 program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	*
	* This driver is based on max8997.c
	*/

	#include <linux/module.h>
	#include <linux/slab.h>
	#include <linux/i2c.h>
	#include <linux/err.h>
	#include <linux/interrupt.h>
	#include <linux/of.h>
	#include <linux/pm_runtime.h>
	#include <linux/mutex.h>
	#include <linux/mfd/core.h>
	#include <linux/mfd/max77693.h>
	#include <linux/mfd/max77693-private.h>
	#include <linux/regulator/machine.h>
	#include <linux/regmap.h>

	#define I2C_ADDR_PMIC (0xCC >> 1) /* Charger, Flash LED */
	#define I2C_ADDR_MUIC (0x4A >> 1)
	#define I2C_ADDR_HAPTIC (0x90 >> 1)

	static const struct mfd_cell max77693_devs[] = {
	{ .name = "max77693-pmic", },
	{ .name = "max77693-charger", },
	{ .name = "max77693-flash", },
	{ .name = "max77693-muic", },
	{ .name = "max77693-haptic", },
	};

	int max77693_read_reg(struct regmap map, u8 reg, u8 dest)
	{
	unsigned int val;
	int ret;

	ret = regmap_read(map, reg, &val);
	*dest = val;

	return ret;
	}
	EXPORT_SYMBOL_GPL(max77693_read_reg);

	int max77693_bulk_read(struct regmap map, u8 reg, int count, u8 buf)
	{
	int ret;

	ret = regmap_bulk_read(map, reg, buf, count);

	return ret;
	}
	EXPORT_SYMBOL_GPL(max77693_bulk_read);

	int max77693_write_reg(struct regmap *map, u8 reg, u8 value)
	{
	int ret;

	ret = regmap_write(map, reg, value);

	return ret;
	}
	EXPORT_SYMBOL_GPL(max77693_write_reg);

	int max77693_bulk_write(struct regmap map, u8 reg, int count, u8 buf)
	{
	int ret;

	ret = regmap_bulk_write(map, reg, buf, count);

	return ret;
	}
	EXPORT_SYMBOL_GPL(max77693_bulk_write);

	int max77693_update_reg(struct regmap *map, u8 reg, u8 val, u8 mask)
	{
	int ret;

	ret = regmap_update_bits(map, reg, mask, val);

	return ret;
	}
	EXPORT_SYMBOL_GPL(max77693_update_reg);

	static const struct regmap_config max77693_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,
	.max_register = MAX77693_PMIC_REG_END,
	};

	static const struct regmap_config max77693_regmap_muic_config = {
	.reg_bits = 8,
	.val_bits = 8,
	.max_register = MAX77693_MUIC_REG_END,
	};

	static int max77693_i2c_probe(struct i2c_client *i2c,
	const struct i2c_device_id *id)
	{
	struct max77693_dev *max77693;
	u8 reg_data;
	int ret = 0;

	max77693 = devm_kzalloc(&i2c->dev,
	sizeof(struct max77693_dev), GFP_KERNEL);
	if (max77693 == NULL)
	return -ENOMEM;

	i2c_set_clientdata(i2c, max77693);
	max77693->dev = &i2c->dev;
	max77693->i2c = i2c;
	max77693->irq = i2c->irq;
	max77693->type = id->driver_data;

	max77693->regmap = devm_regmap_init_i2c(i2c, &max77693_regmap_config);
	if (IS_ERR(max77693->regmap)) {
	ret = PTR_ERR(max77693->regmap);
	dev_err(max77693->dev, "failed to allocate register map: %d\n",
	ret);
	return ret;
	}

	ret = max77693_read_reg(max77693->regmap, MAX77693_PMIC_REG_PMIC_ID2,
	&reg_data);
	if (ret < 0) {
	dev_err(max77693->dev, "device not found on this channel\n");
	return ret;
	} else
	dev_info(max77693->dev, "device ID: 0x%x\n", reg_data);

	max77693->muic = i2c_new_dummy(i2c->adapter, I2C_ADDR_MUIC);
	if (!max77693->muic) {
	dev_err(max77693->dev, "Failed to allocate I2C device for MUIC\n");
	return -ENODEV;
	}
	i2c_set_clientdata(max77693->muic, max77693);

	max77693->haptic = i2c_new_dummy(i2c->adapter, I2C_ADDR_HAPTIC);
	if (!max77693->haptic) {
	dev_err(max77693->dev, "Failed to allocate I2C device for Haptic\n");
	ret = -ENODEV;
	goto err_i2c_haptic;
	}
	i2c_set_clientdata(max77693->haptic, max77693);

	/*
	* Initialize register map for MUIC device because use regmap-muic
	* instance of MUIC device when irq of max77693 is initialized
	* before call max77693-muic probe() function.
	*/
	max77693->regmap_muic = devm_regmap_init_i2c(max77693->muic,
	&max77693_regmap_muic_config);
	if (IS_ERR(max77693->regmap_muic)) {
	ret = PTR_ERR(max77693->regmap_muic);
	dev_err(max77693->dev,
	"failed to allocate register map: %d\n", ret);
	goto err_regmap_muic;
	}

	ret = max77693_irq_init(max77693);
	if (ret < 0)
	goto err_irq;

	pm_runtime_set_active(max77693->dev);

	ret = mfd_add_devices(max77693->dev, -1, max77693_devs,
	ARRAY_SIZE(max77693_devs), NULL, 0, NULL);
	if (ret < 0)
	goto err_mfd;

	return ret;

	err_mfd:
	max77693_irq_exit(max77693);
	err_irq:
	err_regmap_muic:
	i2c_unregister_device(max77693->haptic);
	err_i2c_haptic:
	i2c_unregister_device(max77693->muic);
	return ret;
	}

	static int max77693_i2c_remove(struct i2c_client *i2c)
	{
	struct max77693_dev *max77693 = i2c_get_clientdata(i2c);

	mfd_remove_devices(max77693->dev);
	max77693_irq_exit(max77693);
	i2c_unregister_device(max77693->muic);
	i2c_unregister_device(max77693->haptic);

	return 0;
	}

	static const struct i2c_device_id max77693_i2c_id[] = {
	{ "max77693", TYPE_MAX77693 },
	{ }
	};
	MODULE_DEVICE_TABLE(i2c, max77693_i2c_id);

	static int max77693_suspend(struct device *dev)
	{
	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
	struct max77693_dev *max77693 = i2c_get_clientdata(i2c);

	if (device_may_wakeup(dev))
	irq_set_irq_wake(max77693->irq, 1);
	return 0;
	}

	static int max77693_resume(struct device *dev)
	{
	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
	struct max77693_dev *max77693 = i2c_get_clientdata(i2c);

	if (device_may_wakeup(dev))
	irq_set_irq_wake(max77693->irq, 0);
	return max77693_irq_resume(max77693);
	}

	static const struct dev_pm_ops max77693_pm = {
	.suspend = max77693_suspend,
	.resume = max77693_resume,
	};

	#ifdef CONFIG_OF
	static const struct of_device_id max77693_dt_match[] = {
	{ .compatible = "maxim,max77693" },
	{},
	};
	#endif

	static struct i2c_driver max77693_i2c_driver = {
	.driver = {
	.name = "max77693",
	.owner = THIS_MODULE,
	.pm = &max77693_pm,
	.of_match_table = of_match_ptr(max77693_dt_match),
	},
	.probe = max77693_i2c_probe,
	.remove = max77693_i2c_remove,
	.id_table = max77693_i2c_id,
	};

	static int __init max77693_i2c_init(void)
	{
	return i2c_add_driver(&max77693_i2c_driver);
	}
	/* init early so consumer devices can complete system boot */
	subsys_initcall(max77693_i2c_init);

	static void __exit max77693_i2c_exit(void)
	{
	i2c_del_driver(&max77693_i2c_driver);
	}
	module_exit(max77693_i2c_exit);

	MODULE_DESCRIPTION("MAXIM 77693 multi-function core driver");
	MODULE_AUTHOR("SangYoung, Son <hello.son@samsung.com>");
	MODULE_LICENSE("GPL");