LXR linux/drivers/misc/ad525x

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * Driver for the Analog Devices digital potentiometers (I2C bus)
   4 *
   5 * Copyright (C) 2010-2011 Michael Hennerich, Analog Devices Inc.
   6 */
   7
   8#include <linux/i2c.h>
   9#include <linux/module.h>
  10
  11#include "ad525x_dpot.h"
  12
  13/* I2C bus functions */
  14static int write_d8(void *client, u8 val)
  15{
  16        return i2c_smbus_write_byte(client, val);
  17}
  18
  19static int write_r8d8(void *client, u8 reg, u8 val)
  20{
  21        return i2c_smbus_write_byte_data(client, reg, val);
  22}
  23
  24static int write_r8d16(void *client, u8 reg, u16 val)
  25{
  26        return i2c_smbus_write_word_data(client, reg, val);
  27}
  28
  29static int read_d8(void *client)
  30{
  31        return i2c_smbus_read_byte(client);
  32}
  33
  34static int read_r8d8(void *client, u8 reg)
  35{
  36        return i2c_smbus_read_byte_data(client, reg);
  37}
  38
  39static int read_r8d16(void *client, u8 reg)
  40{
  41        return i2c_smbus_read_word_data(client, reg);
  42}
  43
  44static const struct ad_dpot_bus_ops bops = {
  45        .read_d8        = read_d8,
  46        .read_r8d8      = read_r8d8,
  47        .read_r8d16     = read_r8d16,
  48        .write_d8       = write_d8,
  49        .write_r8d8     = write_r8d8,
  50        .write_r8d16    = write_r8d16,
  51};
  52
  53static int ad_dpot_i2c_probe(struct i2c_client *client,
  54                                      const struct i2c_device_id *id)
  55{
  56        struct ad_dpot_bus_data bdata = {
  57                .client = client,
  58                .bops = &bops,
  59        };
  60
  61        if (!i2c_check_functionality(client->adapter,
  62                                     I2C_FUNC_SMBUS_WORD_DATA)) {
  63                dev_err(&client->dev, "SMBUS Word Data not Supported\n");
  64                return -EIO;
  65        }
  66
  67        return ad_dpot_probe(&client->dev, &bdata, id->driver_data, id->name);
  68}
  69
  70static int ad_dpot_i2c_remove(struct i2c_client *client)
  71{
  72        return ad_dpot_remove(&client->dev);
  73}
  74
  75static const struct i2c_device_id ad_dpot_id[] = {
  76        {"ad5258", AD5258_ID},
  77        {"ad5259", AD5259_ID},
  78        {"ad5251", AD5251_ID},
  79        {"ad5252", AD5252_ID},
  80        {"ad5253", AD5253_ID},
  81        {"ad5254", AD5254_ID},
  82        {"ad5255", AD5255_ID},
  83        {"ad5241", AD5241_ID},
  84        {"ad5242", AD5242_ID},
  85        {"ad5243", AD5243_ID},
  86        {"ad5245", AD5245_ID},
  87        {"ad5246", AD5246_ID},
  88        {"ad5247", AD5247_ID},
  89        {"ad5248", AD5248_ID},
  90        {"ad5280", AD5280_ID},
  91        {"ad5282", AD5282_ID},
  92        {"adn2860", ADN2860_ID},
  93        {"ad5273", AD5273_ID},
  94        {"ad5161", AD5161_ID},
  95        {"ad5171", AD5171_ID},
  96        {"ad5170", AD5170_ID},
  97        {"ad5172", AD5172_ID},
  98        {"ad5173", AD5173_ID},
  99        {"ad5272", AD5272_ID},
 100        {"ad5274", AD5274_ID},
 101        {}
 102};
 103MODULE_DEVICE_TABLE(i2c, ad_dpot_id);
 104
 105static struct i2c_driver ad_dpot_i2c_driver = {
 106        .driver = {
 107                .name   = "ad_dpot",
 108        },
 109        .probe          = ad_dpot_i2c_probe,
 110        .remove         = ad_dpot_i2c_remove,
 111        .id_table       = ad_dpot_id,
 112};
 113
 114module_i2c_driver(ad_dpot_i2c_driver);
 115
 116MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
 117MODULE_DESCRIPTION("digital potentiometer I2C bus driver");
 118MODULE_LICENSE("GPL");
 119