76 lines
1.7 KiB
C
76 lines
1.7 KiB
C
/*
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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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* Licensed under the GPL-2 or later.
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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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const struct i2c_device_id *id)
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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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{ "ad7879", 0 },
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{ "ad7889", 0 },
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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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.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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