forked from Minki/linux
2581e5d104
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
81 lines
1.8 KiB
C
81 lines
1.8 KiB
C
/*
|
|
* 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 ad7879 *ts;
|
|
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);
|
|
|
|
ts = ad7879_probe(&client->dev, regmap, client->irq,
|
|
BUS_I2C, AD7879_DEVID);
|
|
if (IS_ERR(ts))
|
|
return PTR_ERR(ts);
|
|
|
|
return 0;
|
|
}
|
|
|
|
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");
|