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/*
* max8997.c - mfd core driver for the Maxim 8997
*
* Copyright (C) 2009-2010 Samsung Electronics
*
* based on max8998.c
*
* 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
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/mutex.h>
#include <linux/mfd/core.h>
#include <linux/mfd/max8997.h>
#include <linux/mfd/max8997-private.h>
#define RTC_I2C_ADDR (0x0c >> 1)
#define MUIC_I2C_ADDR (0x4a >> 1)
#define HMOTOR_I2C_ADDR (0x90 >> 1)
static struct mfd_cell max8997_devs[] = {
{
.name = "max8997-pmic",
}, {
.name = "max8997-charger",
}, {
.name = "max8997-rtc",
}, {
.name = "max8997-muic",
}, {
.name = "max8997-hapticmotor",
},
};
int max8997_read_reg(struct i2c_client *i2c, u8 reg, u8 *dest)
{
struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
int ret;
mutex_lock(&max8997->iolock);
ret = i2c_smbus_read_byte_data(i2c, reg);
mutex_unlock(&max8997->iolock);
if (ret < 0)
return ret;
ret &= 0xff;
*dest = ret;
return 0;
}
EXPORT_SYMBOL(max8997_read_reg);
int max8997_bulk_read(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
{
struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
int ret;
mutex_lock(&max8997->iolock);
ret = i2c_smbus_read_i2c_block_data(i2c, reg, count, buf);
mutex_unlock(&max8997->iolock);
if (ret < 0)
return ret;
return 0;
}
EXPORT_SYMBOL(max8997_bulk_read);
int max8997_write_reg(struct i2c_client *i2c, u8 reg, u8 value)
{
struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
int ret;
mutex_lock(&max8997->iolock);
ret = i2c_smbus_write_byte_data(i2c, reg, value);
mutex_unlock(&max8997->iolock);
return ret;
}
EXPORT_SYMBOL(max8997_write_reg);
int max8997_bulk_write(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
{
struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
int ret;
mutex_lock(&max8997->iolock);
ret = i2c_smbus_write_i2c_block_data(i2c, reg, count, buf);
mutex_unlock(&max8997->iolock);
if (ret < 0)
return ret;
return 0;
}
EXPORT_SYMBOL(max8997_bulk_write);
int max8997_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask)
{
struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
int ret;
mutex_lock(&max8997->iolock);
ret = i2c_smbus_read_byte_data(i2c, reg);
if (ret >= 0) {
u8 old_val = ret & 0xff;
u8 new_val = (val & mask) | (old_val & (~mask));
ret = i2c_smbus_write_byte_data(i2c, reg, new_val);
}
mutex_unlock(&max8997->iolock);
return ret;
}
EXPORT_SYMBOL(max8997_update_reg);
static int max8997_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct max8997_platform_data *pdata = i2c->dev.platform_data;
struct max8997_dev *max8997;
int ret = 0;
max8997 = kzalloc(sizeof(struct max8997_dev), GFP_KERNEL);
if (max8997 == NULL)
return -ENOMEM;
i2c_set_clientdata(i2c, max8997);
max8997->dev = &i2c->dev;
max8997->i2c = i2c;
max8997->irq = i2c->irq;
max8997->type = id->driver_data;
if (pdata) {
max8997->ono = pdata->ono;
max8997->irq_base = pdata->irq_base;
max8997->wakeup = pdata->wakeup;
}
mutex_init(&max8997->iolock);
max8997->rtc = i2c_new_dummy(i2c->adapter, RTC_I2C_ADDR);
i2c_set_clientdata(max8997->rtc, max8997);
max8997->muic = i2c_new_dummy(i2c->adapter, MUIC_I2C_ADDR);
i2c_set_clientdata(max8997->muic, max8997);
max8997->hmotor = i2c_new_dummy(i2c->adapter, HMOTOR_I2C_ADDR);
i2c_set_clientdata(max8997->hmotor, max8997);
max8997_irq_init(max8997);
ret = mfd_add_devices(max8997->dev, -1,
max8997_devs, ARRAY_SIZE(max8997_devs),
NULL, 0);
if (ret < 0)
goto err;
return ret;
err:
mfd_remove_devices(max8997->dev);
max8997_irq_exit(max8997);
i2c_unregister_device(max8997->rtc);
kfree(max8997);
return ret;
}
static int max8997_i2c_remove(struct i2c_client *i2c)
{
struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
mfd_remove_devices(max8997->dev);
max8997_irq_exit(max8997);
i2c_unregister_device(max8997->rtc);
kfree(max8997);
return 0;
}
static const struct i2c_device_id max8997_i2c_id[] = {
{ "max8997", TYPE_MAX8997 },
{ }
};
MODULE_DEVICE_TABLE(i2c, max8997_i2c_id);
#ifdef CONFIG_PM
static int max8997_suspend(struct device *dev)
{
struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
if (max8997->wakeup)
enable_irq_wake(max8997->irq);
disable_irq(max8997->irq);
return 0;
}
static int max8997_resume(struct device *dev)
{
struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
if (max8997->wakeup)
disable_irq_wake(max8997->irq);
enable_irq(max8997->irq);
return 0;
}
#else
#define max8997_suspend NULL
#define max8997_resume NULL
#endif /* CONFIG_PM */
const struct dev_pm_ops max8997_pm = {
.suspend = max8997_suspend,
.resume = max8997_resume,
};
static struct i2c_driver max8997_i2c_driver = {
.driver = {
.name = "max8997",
.owner = THIS_MODULE,
.pm = &max8997_pm,
},
.probe = max8997_i2c_probe,
.remove = max8997_i2c_remove,
.id_table = max8997_i2c_id,
};
static int __init max8997_i2c_init(void)
{
return i2c_add_driver(&max8997_i2c_driver);
}
/* init early so consumer devices can complete system boot */
subsys_initcall(max8997_i2c_init);
static void __exit max8997_i2c_exit(void)
{
i2c_del_driver(&max8997_i2c_driver);
}
module_exit(max8997_i2c_exit);
MODULE_DESCRIPTION("MAXIM 8997 multi-function core driver");
MODULE_AUTHOR("<ms925.kim@samsung.com>");
MODULE_LICENSE("GPL");
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