drivers/mfd/88pm8607.c - kernel/msm-4.9 - Gitiles

 /*
  * Base driver for Marvell 88PM8607
  *
  * Copyright (C) 2009 Marvell International Ltd.
  * 	Haojian Zhuang <haojian.zhuang@marvell.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/interrupt.h>
 #include <linux/platform_device.h>
 #include <linux/i2c.h>
 #include <linux/mfd/core.h>
 #include <linux/mfd/88pm8607.h>


 #define PM8607_REG_RESOURCE(_start, _end)		\
 {							\
 	.start	= PM8607_##_start,			\
 	.end	= PM8607_##_end,			\
 	.flags	= IORESOURCE_IO,			\
 }

 static struct resource pm8607_regulator_resources[] = {
 	PM8607_REG_RESOURCE(BUCK1, BUCK1),
 	PM8607_REG_RESOURCE(BUCK2, BUCK2),
 	PM8607_REG_RESOURCE(BUCK3, BUCK3),
 	PM8607_REG_RESOURCE(LDO1,  LDO1),
 	PM8607_REG_RESOURCE(LDO2,  LDO2),
 	PM8607_REG_RESOURCE(LDO3,  LDO3),
 	PM8607_REG_RESOURCE(LDO4,  LDO4),
 	PM8607_REG_RESOURCE(LDO5,  LDO5),
 	PM8607_REG_RESOURCE(LDO6,  LDO6),
 	PM8607_REG_RESOURCE(LDO7,  LDO7),
 	PM8607_REG_RESOURCE(LDO8,  LDO8),
 	PM8607_REG_RESOURCE(LDO9,  LDO9),
 	PM8607_REG_RESOURCE(LDO10, LDO10),
 	PM8607_REG_RESOURCE(LDO12, LDO12),
 	PM8607_REG_RESOURCE(LDO14, LDO14),
 };

 #define PM8607_REG_DEVS(_name, _id)					\
 {									\
 	.name		= "88pm8607-" #_name,				\
 	.num_resources	= 1,						\
 	.resources	= &pm8607_regulator_resources[PM8607_ID_##_id],	\
 }

 static struct mfd_cell pm8607_devs[] = {
 	PM8607_REG_DEVS(buck1, BUCK1),
 	PM8607_REG_DEVS(buck2, BUCK2),
 	PM8607_REG_DEVS(buck3, BUCK3),
 	PM8607_REG_DEVS(ldo1,  LDO1),
 	PM8607_REG_DEVS(ldo2,  LDO2),
 	PM8607_REG_DEVS(ldo3,  LDO3),
 	PM8607_REG_DEVS(ldo4,  LDO4),
 	PM8607_REG_DEVS(ldo5,  LDO5),
 	PM8607_REG_DEVS(ldo6,  LDO6),
 	PM8607_REG_DEVS(ldo7,  LDO7),
 	PM8607_REG_DEVS(ldo8,  LDO8),
 	PM8607_REG_DEVS(ldo9,  LDO9),
 	PM8607_REG_DEVS(ldo10, LDO10),
 	PM8607_REG_DEVS(ldo12, LDO12),
 	PM8607_REG_DEVS(ldo14, LDO14),
 };

 static inline int pm8607_read_device(struct pm8607_chip *chip,
 				     int reg, int bytes, void *dest)
 {
 	struct i2c_client *i2c = chip->client;
 	unsigned char data;
 	int ret;

 	data = (unsigned char)reg;
 	ret = i2c_master_send(i2c, &data, 1);
 	if (ret < 0)
 		return ret;

 	ret = i2c_master_recv(i2c, dest, bytes);
 	if (ret < 0)
 		return ret;
 	return 0;
 }

 static inline int pm8607_write_device(struct pm8607_chip *chip,
 				      int reg, int bytes, void *src)
 {
 	struct i2c_client *i2c = chip->client;
 	unsigned char buf[bytes + 1];
 	int ret;

 	buf[0] = (unsigned char)reg;
 	memcpy(&buf[1], src, bytes);

 	ret = i2c_master_send(i2c, buf, bytes + 1);
 	if (ret < 0)
 		return ret;
 	return 0;
 }

 int pm8607_reg_read(struct pm8607_chip *chip, int reg)
 {
 	unsigned char data;
 	int ret;

 	mutex_lock(&chip->io_lock);
 	ret = chip->read(chip, reg, 1, &data);
 	mutex_unlock(&chip->io_lock);

 	if (ret < 0)
 		return ret;
 	else
 		return (int)data;
 }
 EXPORT_SYMBOL(pm8607_reg_read);

 int pm8607_reg_write(struct pm8607_chip *chip, int reg,
 		     unsigned char data)
 {
 	int ret;

 	mutex_lock(&chip->io_lock);
 	ret = chip->write(chip, reg, 1, &data);
 	mutex_unlock(&chip->io_lock);

 	return ret;
 }
 EXPORT_SYMBOL(pm8607_reg_write);

 int pm8607_bulk_read(struct pm8607_chip *chip, int reg,
 		     int count, unsigned char *buf)
 {
 	int ret;

 	mutex_lock(&chip->io_lock);
 	ret = chip->read(chip, reg, count, buf);
 	mutex_unlock(&chip->io_lock);

 	return ret;
 }
 EXPORT_SYMBOL(pm8607_bulk_read);

 int pm8607_bulk_write(struct pm8607_chip *chip, int reg,
 		      int count, unsigned char *buf)
 {
 	int ret;

 	mutex_lock(&chip->io_lock);
 	ret = chip->write(chip, reg, count, buf);
 	mutex_unlock(&chip->io_lock);

 	return ret;
 }
 EXPORT_SYMBOL(pm8607_bulk_write);

 int pm8607_set_bits(struct pm8607_chip *chip, int reg,
 		    unsigned char mask, unsigned char data)
 {
 	unsigned char value;
 	int ret;

 	mutex_lock(&chip->io_lock);
 	ret = chip->read(chip, reg, 1, &value);
 	if (ret < 0)
 		goto out;
 	value &= ~mask;
 	value |= data;
 	ret = chip->write(chip, reg, 1, &value);
 out:
 	mutex_unlock(&chip->io_lock);
 	return ret;
 }
 EXPORT_SYMBOL(pm8607_set_bits);


 static const struct i2c_device_id pm8607_id_table[] = {
 	{ "88PM8607", 0 },
 	{}
 };
 MODULE_DEVICE_TABLE(i2c, pm8607_id_table);


 static int __devinit pm8607_probe(struct i2c_client *client,
 				  const struct i2c_device_id *id)
 {
 	struct pm8607_platform_data *pdata = client->dev.platform_data;
 	struct pm8607_chip *chip;
 	int i, count;
 	int ret;

 	chip = kzalloc(sizeof(struct pm8607_chip), GFP_KERNEL);
 	if (chip == NULL)
 		return -ENOMEM;

 	chip->client = client;
 	chip->dev = &client->dev;
 	chip->read = pm8607_read_device;
 	chip->write = pm8607_write_device;
 	i2c_set_clientdata(client, chip);

 	mutex_init(&chip->io_lock);
 	dev_set_drvdata(chip->dev, chip);

 	ret = pm8607_reg_read(chip, PM8607_CHIP_ID);
 	if (ret < 0) {
 		dev_err(chip->dev, "Failed to read CHIP ID: %d\n", ret);
 		goto out;
 	}
 	if ((ret & CHIP_ID_MASK) == CHIP_ID)
 		dev_info(chip->dev, "Marvell 88PM8607 (ID: %02x) detected\n",
 			 ret);
 	else {
 		dev_err(chip->dev, "Failed to detect Marvell 88PM8607. "
 			"Chip ID: %02x\n", ret);
 		goto out;
 	}
 	chip->chip_id = ret;

 	ret = pm8607_reg_read(chip, PM8607_BUCK3);
 	if (ret < 0) {
 		dev_err(chip->dev, "Failed to read BUCK3 register: %d\n", ret);
 		goto out;
 	}
 	if (ret & PM8607_BUCK3_DOUBLE)
 		chip->buck3_double = 1;

 	ret = pm8607_reg_read(chip, PM8607_MISC1);
 	if (ret < 0) {
 		dev_err(chip->dev, "Failed to read MISC1 register: %d\n", ret);
 		goto out;
 	}
 	if (pdata->i2c_port == PI2C_PORT)
 		ret |= PM8607_MISC1_PI2C;
 	else
 		ret &= ~PM8607_MISC1_PI2C;
 	ret = pm8607_reg_write(chip, PM8607_MISC1, ret);
 	if (ret < 0) {
 		dev_err(chip->dev, "Failed to write MISC1 register: %d\n", ret);
 		goto out;
 	}


 	count = ARRAY_SIZE(pm8607_devs);
 	for (i = 0; i < count; i++) {
 		ret = mfd_add_devices(chip->dev, i, &pm8607_devs[i],
 				      1, NULL, 0);
 		if (ret != 0) {
 			dev_err(chip->dev, "Failed to add subdevs\n");
 			goto out;
 		}
 	}

 	return 0;

 out:
 	i2c_set_clientdata(client, NULL);
 	kfree(chip);
 	return ret;
 }

 static int __devexit pm8607_remove(struct i2c_client *client)
 {
 	struct pm8607_chip *chip = i2c_get_clientdata(client);

 	mfd_remove_devices(chip->dev);
 	kfree(chip);
 	return 0;
 }

 static struct i2c_driver pm8607_driver = {
 	.driver	= {
 		.name	= "88PM8607",
 		.owner	= THIS_MODULE,
 	},
 	.probe		= pm8607_probe,
 	.remove		= __devexit_p(pm8607_remove),
 	.id_table	= pm8607_id_table,
 };

 static int __init pm8607_init(void)
 {
 	int ret;
 	ret = i2c_add_driver(&pm8607_driver);
 	if (ret != 0)
 		pr_err("Failed to register 88PM8607 I2C driver: %d\n", ret);
 	return ret;
 }
 subsys_initcall(pm8607_init);

 static void __exit pm8607_exit(void)
 {
 	i2c_del_driver(&pm8607_driver);
 }
 module_exit(pm8607_exit);

 MODULE_DESCRIPTION("PMIC Driver for Marvell 88PM8607");
 MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
 MODULE_LICENSE("GPL");
	/*
	* Base driver for Marvell 88PM8607
	*
	* Copyright (C) 2009 Marvell International Ltd.
	* Haojian Zhuang <haojian.zhuang@marvell.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/interrupt.h>
	#include <linux/platform_device.h>
	#include <linux/i2c.h>
	#include <linux/mfd/core.h>
	#include <linux/mfd/88pm8607.h>


	#define PM8607_REG_RESOURCE(_start, _end) \
	{ \
	.start = PM8607_##_start, \
	.end = PM8607_##_end, \
	.flags = IORESOURCE_IO, \
	}

	static struct resource pm8607_regulator_resources[] = {
	PM8607_REG_RESOURCE(BUCK1, BUCK1),
	PM8607_REG_RESOURCE(BUCK2, BUCK2),
	PM8607_REG_RESOURCE(BUCK3, BUCK3),
	PM8607_REG_RESOURCE(LDO1, LDO1),
	PM8607_REG_RESOURCE(LDO2, LDO2),
	PM8607_REG_RESOURCE(LDO3, LDO3),
	PM8607_REG_RESOURCE(LDO4, LDO4),
	PM8607_REG_RESOURCE(LDO5, LDO5),
	PM8607_REG_RESOURCE(LDO6, LDO6),
	PM8607_REG_RESOURCE(LDO7, LDO7),
	PM8607_REG_RESOURCE(LDO8, LDO8),
	PM8607_REG_RESOURCE(LDO9, LDO9),
	PM8607_REG_RESOURCE(LDO10, LDO10),
	PM8607_REG_RESOURCE(LDO12, LDO12),
	PM8607_REG_RESOURCE(LDO14, LDO14),
	};

	#define PM8607_REG_DEVS(_name, _id) \
	{ \
	.name = "88pm8607-" #_name, \
	.num_resources = 1, \
	.resources = &pm8607_regulator_resources[PM8607_ID_##_id], \
	}

	static struct mfd_cell pm8607_devs[] = {
	PM8607_REG_DEVS(buck1, BUCK1),
	PM8607_REG_DEVS(buck2, BUCK2),
	PM8607_REG_DEVS(buck3, BUCK3),
	PM8607_REG_DEVS(ldo1, LDO1),
	PM8607_REG_DEVS(ldo2, LDO2),
	PM8607_REG_DEVS(ldo3, LDO3),
	PM8607_REG_DEVS(ldo4, LDO4),
	PM8607_REG_DEVS(ldo5, LDO5),
	PM8607_REG_DEVS(ldo6, LDO6),
	PM8607_REG_DEVS(ldo7, LDO7),
	PM8607_REG_DEVS(ldo8, LDO8),
	PM8607_REG_DEVS(ldo9, LDO9),
	PM8607_REG_DEVS(ldo10, LDO10),
	PM8607_REG_DEVS(ldo12, LDO12),
	PM8607_REG_DEVS(ldo14, LDO14),
	};

	static inline int pm8607_read_device(struct pm8607_chip *chip,
	int reg, int bytes, void *dest)
	{
	struct i2c_client *i2c = chip->client;
	unsigned char data;
	int ret;

	data = (unsigned char)reg;
	ret = i2c_master_send(i2c, &data, 1);
	if (ret < 0)
	return ret;

	ret = i2c_master_recv(i2c, dest, bytes);
	if (ret < 0)
	return ret;
	return 0;
	}

	static inline int pm8607_write_device(struct pm8607_chip *chip,
	int reg, int bytes, void *src)
	{
	struct i2c_client *i2c = chip->client;
	unsigned char buf[bytes + 1];
	int ret;

	buf[0] = (unsigned char)reg;
	memcpy(&buf[1], src, bytes);

	ret = i2c_master_send(i2c, buf, bytes + 1);
	if (ret < 0)
	return ret;
	return 0;
	}

	int pm8607_reg_read(struct pm8607_chip *chip, int reg)
	{
	unsigned char data;
	int ret;

	mutex_lock(&chip->io_lock);
	ret = chip->read(chip, reg, 1, &data);
	mutex_unlock(&chip->io_lock);

	if (ret < 0)
	return ret;
	else
	return (int)data;
	}
	EXPORT_SYMBOL(pm8607_reg_read);

	int pm8607_reg_write(struct pm8607_chip *chip, int reg,
	unsigned char data)
	{
	int ret;

	mutex_lock(&chip->io_lock);
	ret = chip->write(chip, reg, 1, &data);
	mutex_unlock(&chip->io_lock);

	return ret;
	}
	EXPORT_SYMBOL(pm8607_reg_write);

	int pm8607_bulk_read(struct pm8607_chip *chip, int reg,
	int count, unsigned char *buf)
	{
	int ret;

	mutex_lock(&chip->io_lock);
	ret = chip->read(chip, reg, count, buf);
	mutex_unlock(&chip->io_lock);

	return ret;
	}
	EXPORT_SYMBOL(pm8607_bulk_read);

	int pm8607_bulk_write(struct pm8607_chip *chip, int reg,
	int count, unsigned char *buf)
	{
	int ret;

	mutex_lock(&chip->io_lock);
	ret = chip->write(chip, reg, count, buf);
	mutex_unlock(&chip->io_lock);

	return ret;
	}
	EXPORT_SYMBOL(pm8607_bulk_write);

	int pm8607_set_bits(struct pm8607_chip *chip, int reg,
	unsigned char mask, unsigned char data)
	{
	unsigned char value;
	int ret;

	mutex_lock(&chip->io_lock);
	ret = chip->read(chip, reg, 1, &value);
	if (ret < 0)
	goto out;
	value &= ~mask;
	value \|= data;
	ret = chip->write(chip, reg, 1, &value);
	out:
	mutex_unlock(&chip->io_lock);
	return ret;
	}
	EXPORT_SYMBOL(pm8607_set_bits);


	static const struct i2c_device_id pm8607_id_table[] = {
	{ "88PM8607", 0 },
	{}
	};
	MODULE_DEVICE_TABLE(i2c, pm8607_id_table);


	static int __devinit pm8607_probe(struct i2c_client *client,
	const struct i2c_device_id *id)
	{
	struct pm8607_platform_data *pdata = client->dev.platform_data;
	struct pm8607_chip *chip;
	int i, count;
	int ret;

	chip = kzalloc(sizeof(struct pm8607_chip), GFP_KERNEL);
	if (chip == NULL)
	return -ENOMEM;

	chip->client = client;
	chip->dev = &client->dev;
	chip->read = pm8607_read_device;
	chip->write = pm8607_write_device;
	i2c_set_clientdata(client, chip);

	mutex_init(&chip->io_lock);
	dev_set_drvdata(chip->dev, chip);

	ret = pm8607_reg_read(chip, PM8607_CHIP_ID);
	if (ret < 0) {
	dev_err(chip->dev, "Failed to read CHIP ID: %d\n", ret);
	goto out;
	}
	if ((ret & CHIP_ID_MASK) == CHIP_ID)
	dev_info(chip->dev, "Marvell 88PM8607 (ID: %02x) detected\n",
	ret);
	else {
	dev_err(chip->dev, "Failed to detect Marvell 88PM8607. "
	"Chip ID: %02x\n", ret);
	goto out;
	}
	chip->chip_id = ret;

	ret = pm8607_reg_read(chip, PM8607_BUCK3);
	if (ret < 0) {
	dev_err(chip->dev, "Failed to read BUCK3 register: %d\n", ret);
	goto out;
	}
	if (ret & PM8607_BUCK3_DOUBLE)
	chip->buck3_double = 1;

	ret = pm8607_reg_read(chip, PM8607_MISC1);
	if (ret < 0) {
	dev_err(chip->dev, "Failed to read MISC1 register: %d\n", ret);
	goto out;
	}
	if (pdata->i2c_port == PI2C_PORT)
	ret \|= PM8607_MISC1_PI2C;
	else
	ret &= ~PM8607_MISC1_PI2C;
	ret = pm8607_reg_write(chip, PM8607_MISC1, ret);
	if (ret < 0) {
	dev_err(chip->dev, "Failed to write MISC1 register: %d\n", ret);
	goto out;
	}


	count = ARRAY_SIZE(pm8607_devs);
	for (i = 0; i < count; i++) {
	ret = mfd_add_devices(chip->dev, i, &pm8607_devs[i],
	1, NULL, 0);
	if (ret != 0) {
	dev_err(chip->dev, "Failed to add subdevs\n");
	goto out;
	}
	}

	return 0;

	out:
	i2c_set_clientdata(client, NULL);
	kfree(chip);
	return ret;
	}

	static int __devexit pm8607_remove(struct i2c_client *client)
	{
	struct pm8607_chip *chip = i2c_get_clientdata(client);

	mfd_remove_devices(chip->dev);
	kfree(chip);
	return 0;
	}

	static struct i2c_driver pm8607_driver = {
	.driver = {
	.name = "88PM8607",
	.owner = THIS_MODULE,
	},
	.probe = pm8607_probe,
	.remove = __devexit_p(pm8607_remove),
	.id_table = pm8607_id_table,
	};

	static int __init pm8607_init(void)
	{
	int ret;
	ret = i2c_add_driver(&pm8607_driver);
	if (ret != 0)
	pr_err("Failed to register 88PM8607 I2C driver: %d\n", ret);
	return ret;
	}
	subsys_initcall(pm8607_init);

	static void __exit pm8607_exit(void)
	{
	i2c_del_driver(&pm8607_driver);
	}
	module_exit(pm8607_exit);

	MODULE_DESCRIPTION("PMIC Driver for Marvell 88PM8607");
	MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
	MODULE_LICENSE("GPL");