mirror of
https://github.com/torvalds/linux.git
synced 2024-11-13 23:51:39 +00:00
aaaa287b89
Commit 6c536e4ce8 ("ad525x_dpot: add support for SPI parts") added
support for the AD5161 through SPI, but the device supports both I2C and
SPI (depending on the DIS pin), so add it to -i2c as well.
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
138 lines
3.0 KiB
C
138 lines
3.0 KiB
C
/*
|
|
* 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},
|
|
{"ad5241", AD5241_ID},
|
|
{"ad5242", AD5242_ID},
|
|
{"ad5243", AD5243_ID},
|
|
{"ad5245", AD5245_ID},
|
|
{"ad5246", AD5246_ID},
|
|
{"ad5247", AD5247_ID},
|
|
{"ad5248", AD5248_ID},
|
|
{"ad5280", AD5280_ID},
|
|
{"ad5282", AD5282_ID},
|
|
{"adn2860", ADN2860_ID},
|
|
{"ad5273", AD5273_ID},
|
|
{"ad5161", AD5161_ID},
|
|
{"ad5171", AD5171_ID},
|
|
{"ad5170", AD5170_ID},
|
|
{"ad5172", AD5172_ID},
|
|
{"ad5173", AD5173_ID},
|
|
{"ad5272", AD5272_ID},
|
|
{"ad5274", AD5274_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");
|