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/*
* Driver for the Analog Devices digital potentiometers (I2C bus)
*
* Copyright (C) 2010 Michael Hennerich, Analog Devices Inc.
*
* Licensed under the GPL-2 or later.
*/
#include <linux/i2c.h>
#include <linux/module.h>
#include "ad525x_dpot.h"
/* ------------------------------------------------------------------------- */
/* I2C bus functions */
static int write_d8(void *client, u8 val)
{
return i2c_smbus_write_byte(client, val);
}
static int write_r8d8(void *client, u8 reg, u8 val)
{
return i2c_smbus_write_byte_data(client, reg, val);
}
static int write_r8d16(void *client, u8 reg, u16 val)
{
return i2c_smbus_write_word_data(client, reg, val);
}
static int read_d8(void *client)
{
return i2c_smbus_read_byte(client);
}
static int read_r8d8(void *client, u8 reg)
{
return i2c_smbus_read_byte_data(client, reg);
}
static int read_r8d16(void *client, u8 reg)
{
return i2c_smbus_read_word_data(client, reg);
}
static const struct ad_dpot_bus_ops bops = {
.read_d8 = read_d8,
.read_r8d8 = read_r8d8,
.read_r8d16 = read_r8d16,
.write_d8 = write_d8,
.write_r8d8 = write_r8d8,
.write_r8d16 = write_r8d16,
};
static int __devinit ad_dpot_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct ad_dpot_bus_data bdata = {
.client = client,
.bops = &bops,
};
struct ad_dpot_id dpot_id = {
.name = (char *) &id->name,
.devid = id->driver_data,
};
if (!i2c_check_functionality(client->adapter,
I2C_FUNC_SMBUS_WORD_DATA)) {
dev_err(&client->dev, "SMBUS Word Data not Supported\n");
return -EIO;
}
return ad_dpot_probe(&client->dev, &bdata, &dpot_id);
}
static int __devexit ad_dpot_i2c_remove(struct i2c_client *client)
{
return ad_dpot_remove(&client->dev);
}
static const struct i2c_device_id ad_dpot_id[] = {
{"ad5258", AD5258_ID},
{"ad5259", AD5259_ID},
{"ad5251", AD5251_ID},
{"ad5252", AD5252_ID},
{"ad5253", AD5253_ID},
{"ad5254", AD5254_ID},
{"ad5255", AD5255_ID},
{}
};
MODULE_DEVICE_TABLE(i2c, ad_dpot_id);
static struct i2c_driver ad_dpot_i2c_driver = {
.driver = {
.name = "ad_dpot",
.owner = THIS_MODULE,
},
.probe = ad_dpot_i2c_probe,
.remove = __devexit_p(ad_dpot_i2c_remove),
.id_table = ad_dpot_id,
};
static int __init ad_dpot_i2c_init(void)
{
return i2c_add_driver(&ad_dpot_i2c_driver);
}
module_init(ad_dpot_i2c_init);
static void __exit ad_dpot_i2c_exit(void)
{
i2c_del_driver(&ad_dpot_i2c_driver);
}
module_exit(ad_dpot_i2c_exit);
MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
MODULE_DESCRIPTION("digital potentiometer I2C bus driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("i2c:ad_dpot");
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