blob: e67997cc36122cb2017f11724e0835cab0e67f5d [file] [log] [blame]
/* Copyright (c) 2009, Code Aurora Forum. 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 version 2 and
* only version 2 as published by the Free Software Foundation.
*
* 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.
*
*/
#include <linux/i2c.h>
#include <linux/mfd/tps65023.h>
/* TPS65023_registers */
#define TPS65023_VERSION 0
#define TPS65023_PGOODZ 1
#define TPS65023_MASK 2
#define TPS65023_REG_CTRL 3
#define TPS65023_CON_CTRL 4
#define TPS65023_CON_CTRL2 5
#define TPS65023_DEFCORE 6
#define TPS65023_DEFSLEW 7
#define TPS65023_LDO_CTRL 8
#define TPS65023_MAX 9
static struct i2c_client *tpsclient;
int tps65023_set_dcdc1_level(int mvolts)
{
int val;
int ret;
if (!tpsclient)
return -ENODEV;
if (mvolts < 800 || mvolts > 1600)
return -EINVAL;
if (mvolts == 1600)
val = 0x1F;
else
val = ((mvolts - 800)/25) & 0x1F;
ret = i2c_smbus_write_byte_data(tpsclient, TPS65023_DEFCORE, val);
if (!ret)
ret = i2c_smbus_write_byte_data(tpsclient,
TPS65023_CON_CTRL2, 0x80);
return ret;
}
EXPORT_SYMBOL(tps65023_set_dcdc1_level);
int tps65023_get_dcdc1_level(int *mvolts)
{
int val;
if (!tpsclient)
return -ENODEV;
val = i2c_smbus_read_byte_data(tpsclient, TPS65023_DEFCORE) & 0x1F;
if (val == 0x1F)
*mvolts = 1600;
else
*mvolts = (val * 25) + 800;
return 0;
}
EXPORT_SYMBOL(tps65023_get_dcdc1_level);
static int tps65023_probe(struct i2c_client *client,
const struct i2c_device_id *dev_id)
{
if (!i2c_check_functionality(client->adapter,
I2C_FUNC_SMBUS_BYTE_DATA)) {
printk(KERN_ERR "TPS65023 does not support SMBUS_BYTE_DATA.\n");
return -EINVAL;
}
tpsclient = client;
printk(KERN_INFO "TPS65023: PMIC probed.\n");
return 0;
}
static int __devexit tps65023_remove(struct i2c_client *client)
{
tpsclient = NULL;
return 0;
}
static const struct i2c_device_id tps65023_id[] = {
{ "tps65023", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, tps65023_id);
static struct i2c_driver tps65023_driver = {
.driver = {
.name = "tps65023",
.owner = THIS_MODULE,
},
.probe = tps65023_probe,
.remove = __devexit_p(tps65023_remove),
.id_table = tps65023_id,
};
static int __init tps65023_init(void)
{
return i2c_add_driver(&tps65023_driver);
}
static void __exit tps65023_exit(void)
{
i2c_del_driver(&tps65023_driver);
}
module_init(tps65023_init);
module_exit(tps65023_exit);