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/*
* I2C 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/platform_device.h>
#include <linux/i2c.h>
#include <linux/mfd/88pm8607.h>
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 pm860x_id_table[] = {
{ "88PM8607", 0 },
{}
};
MODULE_DEVICE_TABLE(i2c, pm860x_id_table);
static int __devinit pm860x_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 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;
memcpy(&chip->id, id, sizeof(struct i2c_device_id));
i2c_set_clientdata(client, chip);
mutex_init(&chip->io_lock);
dev_set_drvdata(chip->dev, chip);
ret = pm860x_device_init(chip, pdata);
if (ret < 0)
goto out;
return 0;
out:
i2c_set_clientdata(client, NULL);
kfree(chip);
return ret;
}
static int __devexit pm860x_remove(struct i2c_client *client)
{
struct pm8607_chip *chip = i2c_get_clientdata(client);
kfree(chip);
return 0;
}
static struct i2c_driver pm860x_driver = {
.driver = {
.name = "88PM860x",
.owner = THIS_MODULE,
},
.probe = pm860x_probe,
.remove = __devexit_p(pm860x_remove),
.id_table = pm860x_id_table,
};
static int __init pm860x_i2c_init(void)
{
int ret;
ret = i2c_add_driver(&pm860x_driver);
if (ret != 0)
pr_err("Failed to register 88PM860x I2C driver: %d\n", ret);
return ret;
}
subsys_initcall(pm860x_i2c_init);
static void __exit pm860x_i2c_exit(void)
{
i2c_del_driver(&pm860x_driver);
}
module_exit(pm860x_i2c_exit);
MODULE_DESCRIPTION("I2C Driver for Marvell 88PM860x");
MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
MODULE_LICENSE("GPL");
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