mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-05 18:39:59 +00:00
![Barry Song](/assets/img/avatar_default.png)
Signed-off-by: Barry Song <barry.song@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
140 lines
2.8 KiB
C
140 lines
2.8 KiB
C
/*
|
|
* AD714X CapTouch Programmable Controller driver (I2C bus)
|
|
*
|
|
* Copyright 2009 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 "ad714x.h"
|
|
|
|
#ifdef CONFIG_PM
|
|
static int ad714x_i2c_suspend(struct i2c_client *client, pm_message_t message)
|
|
{
|
|
return ad714x_disable(i2c_get_clientdata(client));
|
|
}
|
|
|
|
static int ad714x_i2c_resume(struct i2c_client *client)
|
|
{
|
|
return ad714x_enable(i2c_get_clientdata(client));
|
|
}
|
|
#else
|
|
# define ad714x_i2c_suspend NULL
|
|
# define ad714x_i2c_resume NULL
|
|
#endif
|
|
|
|
static int ad714x_i2c_write(struct device *dev, unsigned short reg,
|
|
unsigned short data)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
int ret = 0;
|
|
u8 *_reg = (u8 *)®
|
|
u8 *_data = (u8 *)&data;
|
|
|
|
u8 tx[4] = {
|
|
_reg[1],
|
|
_reg[0],
|
|
_data[1],
|
|
_data[0]
|
|
};
|
|
|
|
ret = i2c_master_send(client, tx, 4);
|
|
if (ret < 0)
|
|
dev_err(&client->dev, "I2C write error\n");
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int ad714x_i2c_read(struct device *dev, unsigned short reg,
|
|
unsigned short *data)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
int ret = 0;
|
|
u8 *_reg = (u8 *)®
|
|
u8 *_data = (u8 *)data;
|
|
|
|
u8 tx[2] = {
|
|
_reg[1],
|
|
_reg[0]
|
|
};
|
|
u8 rx[2];
|
|
|
|
ret = i2c_master_send(client, tx, 2);
|
|
if (ret >= 0)
|
|
ret = i2c_master_recv(client, rx, 2);
|
|
|
|
if (unlikely(ret < 0)) {
|
|
dev_err(&client->dev, "I2C read error\n");
|
|
} else {
|
|
_data[0] = rx[1];
|
|
_data[1] = rx[0];
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int __devinit ad714x_i2c_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct ad714x_chip *chip;
|
|
|
|
chip = ad714x_probe(&client->dev, BUS_I2C, client->irq,
|
|
ad714x_i2c_read, ad714x_i2c_write);
|
|
if (IS_ERR(chip))
|
|
return PTR_ERR(chip);
|
|
|
|
i2c_set_clientdata(client, chip);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __devexit ad714x_i2c_remove(struct i2c_client *client)
|
|
{
|
|
struct ad714x_chip *chip = i2c_get_clientdata(client);
|
|
|
|
ad714x_remove(chip);
|
|
i2c_set_clientdata(client, NULL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct i2c_device_id ad714x_id[] = {
|
|
{ "ad7142_captouch", 0 },
|
|
{ "ad7143_captouch", 0 },
|
|
{ "ad7147_captouch", 0 },
|
|
{ "ad7147a_captouch", 0 },
|
|
{ "ad7148_captouch", 0 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, ad714x_id);
|
|
|
|
static struct i2c_driver ad714x_i2c_driver = {
|
|
.driver = {
|
|
.name = "ad714x_captouch",
|
|
},
|
|
.probe = ad714x_i2c_probe,
|
|
.remove = __devexit_p(ad714x_i2c_remove),
|
|
.suspend = ad714x_i2c_suspend,
|
|
.resume = ad714x_i2c_resume,
|
|
.id_table = ad714x_id,
|
|
};
|
|
|
|
static __init int ad714x_i2c_init(void)
|
|
{
|
|
return i2c_add_driver(&ad714x_i2c_driver);
|
|
}
|
|
module_init(ad714x_i2c_init);
|
|
|
|
static __exit void ad714x_i2c_exit(void)
|
|
{
|
|
i2c_del_driver(&ad714x_i2c_driver);
|
|
}
|
|
module_exit(ad714x_i2c_exit);
|
|
|
|
MODULE_DESCRIPTION("Analog Devices AD714X Capacitance Touch Sensor I2C Bus Driver");
|
|
MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
|
|
MODULE_LICENSE("GPL");
|