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/*
* Copyright (C) 2010 Freescale Semiconductor, Inc. All Rights Reserved.
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/*!
* @file ltc3589-i2c.c
* @brief This is the generic I2C driver for Linear 3589 PMIC.
*
* @ingroup PMIC_CORE
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
#include <linux/mfd/ltc3589/core.h>
#include <linux/uaccess.h>
#include <linux/slab.h>
static inline int ltc3589_i2c_read(struct ltc3589 *ltc, u8 reg)
{
return i2c_smbus_read_byte_data(ltc->i2c_client, reg);
}
static inline int ltc3589_i2c_write(struct ltc3589 *ltc, u8 reg, u8 val)
{
return i2c_smbus_write_byte_data(ltc->i2c_client, reg, val);
}
static int ltc3589_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct ltc3589 *ltc3589;
struct ltc3589_platform_data *plat_data = i2c->dev.platform_data;
int ret = 0;
ltc3589 = kzalloc(sizeof(struct ltc3589), GFP_KERNEL);
if (ltc3589 == NULL)
return -ENOMEM;
i2c_set_clientdata(i2c, ltc3589);
ltc3589->dev = &i2c->dev;
ltc3589->i2c_client = i2c;
ltc3589->read_dev = ltc3589_i2c_read;
ltc3589->write_dev = ltc3589_i2c_write;
if (ltc3589_i2c_read(ltc3589, 0x33) < 0) {
kfree(ltc3589);
return -ENODEV;
}
/* so far, we got matched chip on board */
ltc3589_client = i2c;
if (plat_data && plat_data->init) {
ret = plat_data->init(ltc3589);
if (ret != 0)
return -EINVAL;
}
dev_info(&i2c->dev, "Loaded\n");
return 0;
}
static int ltc3589_i2c_remove(struct i2c_client *i2c)
{
struct ltc3589 *ltc3589 = i2c_get_clientdata(i2c);
kfree(ltc3589);
return 0;
}
static const struct i2c_device_id ltc3589_id[] = {
{ "ltc3589", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, ltc3589_id);
static struct i2c_driver ltc3589_i2c_driver = {
.driver = {
.name = "ltc3589",
.owner = THIS_MODULE,
},
.probe = ltc3589_i2c_probe,
.remove = ltc3589_i2c_remove,
.id_table = ltc3589_id,
};
static int __init ltc3589_i2c_init(void)
{
return i2c_add_driver(<c3589_i2c_driver);
}
/* init early so consumer devices can complete system boot */
subsys_initcall(ltc3589_i2c_init);
static void __exit ltc3589_i2c_exit(void)
{
i2c_del_driver(<c3589_i2c_driver);
}
module_exit(ltc3589_i2c_exit);
MODULE_AUTHOR("Freescale Semiconductor, Inc.");
MODULE_DESCRIPTION("I2C support for the Linear PMIC");
MODULE_LICENSE("GPL");
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