mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2026-08-09 06:14:34 +02:00
Uwe Kleine-König (The Capable Hub)andDmitry Torokhov
47ceab218c
While being less compact, using named initializers allows to more easily see which members of the structs are assigned which value without having to lookup the declaration of the struct. And it's also more robust against changes to the struct definition. The mentioned robustness is relevant for a planned change to struct i2c_device_id that replaces .driver_data by an anonymous union. This patch doesn't modify the compiled arrays, only their representation in source form benefits. The former was confirmed with x86 and arm64 builds. Signed-off-by: Uwe Kleine-König (The Capable Hub) <u.kleine-koenig@baylibre.com> Link: https://patch.msgid.link/20260515164848.497608-2-u.kleine-koenig@baylibre.com Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
75 lines
1.7 KiB
C
75 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* AD7879-1/AD7889-1 touchscreen (I2C bus)
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*
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* Copyright (C) 2008-2010 Michael Hennerich, Analog Devices Inc.
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*/
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#include <linux/input.h> /* BUS_I2C */
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#include <linux/i2c.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/of.h>
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#include <linux/pm.h>
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#include <linux/regmap.h>
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#include "ad7879.h"
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#define AD7879_DEVID 0x79 /* AD7879-1/AD7889-1 */
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static const struct regmap_config ad7879_i2c_regmap_config = {
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.reg_bits = 8,
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.val_bits = 16,
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.max_register = 15,
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};
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static int ad7879_i2c_probe(struct i2c_client *client)
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{
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struct regmap *regmap;
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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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regmap = devm_regmap_init_i2c(client, &ad7879_i2c_regmap_config);
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if (IS_ERR(regmap))
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return PTR_ERR(regmap);
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return ad7879_probe(&client->dev, regmap, client->irq,
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BUS_I2C, AD7879_DEVID);
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}
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static const struct i2c_device_id ad7879_id[] = {
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{ .name = "ad7879" },
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{ .name = "ad7889" },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, ad7879_id);
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#ifdef CONFIG_OF
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static const struct of_device_id ad7879_i2c_dt_ids[] = {
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{ .compatible = "adi,ad7879-1", },
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{ }
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};
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MODULE_DEVICE_TABLE(of, ad7879_i2c_dt_ids);
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#endif
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static struct i2c_driver ad7879_i2c_driver = {
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.driver = {
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.name = "ad7879",
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.dev_groups = ad7879_groups,
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.pm = &ad7879_pm_ops,
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.of_match_table = of_match_ptr(ad7879_i2c_dt_ids),
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},
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.probe = ad7879_i2c_probe,
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.id_table = ad7879_id,
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};
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module_i2c_driver(ad7879_i2c_driver);
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MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
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MODULE_DESCRIPTION("AD7879(-1) touchscreen I2C bus driver");
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MODULE_LICENSE("GPL");
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