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85385a51ce
Up to now ad_dpot_remove() returns zero unconditionally. Make it return void instead which makes it easier to see in the callers that there is no error to handle. Also the return value of i2c and spi remove callbacks is ignored anyway. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Link: https://lore.kernel.org/r/20211012153945.2651412-12-u.kleine-koenig@pengutronix.de Acked-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
120 lines
2.6 KiB
C
120 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Driver for the Analog Devices digital potentiometers (I2C bus)
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*
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* Copyright (C) 2010-2011 Michael Hennerich, Analog Devices Inc.
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*/
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#include <linux/i2c.h>
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#include <linux/module.h>
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#include "ad525x_dpot.h"
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/* I2C bus functions */
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static int write_d8(void *client, u8 val)
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{
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return i2c_smbus_write_byte(client, val);
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}
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static int write_r8d8(void *client, u8 reg, u8 val)
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{
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return i2c_smbus_write_byte_data(client, reg, val);
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}
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static int write_r8d16(void *client, u8 reg, u16 val)
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{
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return i2c_smbus_write_word_data(client, reg, val);
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}
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static int read_d8(void *client)
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{
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return i2c_smbus_read_byte(client);
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}
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static int read_r8d8(void *client, u8 reg)
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{
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return i2c_smbus_read_byte_data(client, reg);
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}
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static int read_r8d16(void *client, u8 reg)
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{
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return i2c_smbus_read_word_data(client, reg);
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}
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static const struct ad_dpot_bus_ops bops = {
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.read_d8 = read_d8,
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.read_r8d8 = read_r8d8,
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.read_r8d16 = read_r8d16,
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.write_d8 = write_d8,
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.write_r8d8 = write_r8d8,
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.write_r8d16 = write_r8d16,
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};
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static int ad_dpot_i2c_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct ad_dpot_bus_data bdata = {
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.client = client,
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.bops = &bops,
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};
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if (!i2c_check_functionality(client->adapter,
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I2C_FUNC_SMBUS_WORD_DATA)) {
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dev_err(&client->dev, "SMBUS Word Data not Supported\n");
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return -EIO;
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}
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return ad_dpot_probe(&client->dev, &bdata, id->driver_data, id->name);
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}
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static int ad_dpot_i2c_remove(struct i2c_client *client)
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{
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ad_dpot_remove(&client->dev);
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return 0;
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}
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static const struct i2c_device_id ad_dpot_id[] = {
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{"ad5258", AD5258_ID},
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{"ad5259", AD5259_ID},
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{"ad5251", AD5251_ID},
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{"ad5252", AD5252_ID},
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{"ad5253", AD5253_ID},
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{"ad5254", AD5254_ID},
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{"ad5255", AD5255_ID},
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{"ad5241", AD5241_ID},
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{"ad5242", AD5242_ID},
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{"ad5243", AD5243_ID},
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{"ad5245", AD5245_ID},
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{"ad5246", AD5246_ID},
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{"ad5247", AD5247_ID},
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{"ad5248", AD5248_ID},
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{"ad5280", AD5280_ID},
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{"ad5282", AD5282_ID},
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{"adn2860", ADN2860_ID},
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{"ad5273", AD5273_ID},
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{"ad5161", AD5161_ID},
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{"ad5171", AD5171_ID},
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{"ad5170", AD5170_ID},
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{"ad5172", AD5172_ID},
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{"ad5173", AD5173_ID},
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{"ad5272", AD5272_ID},
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{"ad5274", AD5274_ID},
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{}
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};
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MODULE_DEVICE_TABLE(i2c, ad_dpot_id);
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static struct i2c_driver ad_dpot_i2c_driver = {
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.driver = {
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.name = "ad_dpot",
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},
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.probe = ad_dpot_i2c_probe,
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.remove = ad_dpot_i2c_remove,
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.id_table = ad_dpot_id,
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};
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module_i2c_driver(ad_dpot_i2c_driver);
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MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
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MODULE_DESCRIPTION("digital potentiometer I2C bus driver");
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MODULE_LICENSE("GPL");
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