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1// SPDX-License-Identifier: GPL-2.0-or-later2/*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{55 const struct i2c_device_id *id = i2c_client_get_device_id(client);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 void ad_dpot_i2c_remove(struct i2c_client *client)71{72 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