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/*
* AD7879-1/AD7889-1 touchscreen (I2C bus)
*
* Copyright (C) 2008-2010 Michael Hennerich, Analog Devices Inc.
*
* Licensed under the GPL-2 or later.
*/
#include <linux/input.h> /* BUS_I2C */
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/of.h>
#include <linux/pm.h>
#include <linux/regmap.h>
#include "ad7879.h"
#define AD7879_DEVID 0x79 /* AD7879-1/AD7889-1 */
static const struct regmap_config ad7879_i2c_regmap_config = {
.reg_bits = 8,
.val_bits = 16,
.max_register = 15,
};
static int ad7879_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct regmap *regmap;
if (!i2c_check_functionality(client->adapter,
I2C_FUNC_SMBUS_WORD_DATA)) {
dev_err(&client->dev, "SMBUS Word Data not Supported\n");
return -EIO;
}
regmap = devm_regmap_init_i2c(client, &ad7879_i2c_regmap_config);
if (IS_ERR(regmap))
return PTR_ERR(regmap);
return ad7879_probe(&client->dev, regmap, client->irq,
BUS_I2C, AD7879_DEVID);
}
static const struct i2c_device_id ad7879_id[] = {
{ "ad7879", 0 },
{ "ad7889", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, ad7879_id);
#ifdef CONFIG_OF
static const struct of_device_id ad7879_i2c_dt_ids[] = {
{ .compatible = "adi,ad7879-1", },
{ }
};
MODULE_DEVICE_TABLE(of, ad7879_i2c_dt_ids);
#endif
static struct i2c_driver ad7879_i2c_driver = {
.driver = {
.name = "ad7879",
.pm = &ad7879_pm_ops,
.of_match_table = of_match_ptr(ad7879_i2c_dt_ids),
},
.probe = ad7879_i2c_probe,
.id_table = ad7879_id,
};
module_i2c_driver(ad7879_i2c_driver);
MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
MODULE_DESCRIPTION("AD7879(-1) touchscreen I2C bus driver");
MODULE_LICENSE("GPL");
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