ad525x_dpot-i2c.c

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/*
 * Driver for the Analog Devices digital potentiometers (I2C bus)
 *
 * Copyright (C) 2010-2011 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,
    };

    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, id->driver_data, id->name);
}

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,
};

module_i2c_driver(ad_dpot_i2c_driver);

MODULE_AUTHOR("Michael Hennerich <[email protected]>");
MODULE_DESCRIPTION("digital potentiometer I2C bus driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("i2c:ad_dpot");