forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
110 lines
2.6 KiB
110 lines
2.6 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
|
/* |
|
* AD714X CapTouch Programmable Controller driver (I2C bus) |
|
* |
|
* Copyright 2009-2011 Analog Devices Inc. |
|
*/ |
|
|
|
#include <linux/input.h> /* BUS_I2C */ |
|
#include <linux/i2c.h> |
|
#include <linux/module.h> |
|
#include <linux/types.h> |
|
#include <linux/pm.h> |
|
#include "ad714x.h" |
|
|
|
static int __maybe_unused ad714x_i2c_suspend(struct device *dev) |
|
{ |
|
return ad714x_disable(i2c_get_clientdata(to_i2c_client(dev))); |
|
} |
|
|
|
static int __maybe_unused ad714x_i2c_resume(struct device *dev) |
|
{ |
|
return ad714x_enable(i2c_get_clientdata(to_i2c_client(dev))); |
|
} |
|
|
|
static SIMPLE_DEV_PM_OPS(ad714x_i2c_pm, ad714x_i2c_suspend, ad714x_i2c_resume); |
|
|
|
static int ad714x_i2c_write(struct ad714x_chip *chip, |
|
unsigned short reg, unsigned short data) |
|
{ |
|
struct i2c_client *client = to_i2c_client(chip->dev); |
|
int error; |
|
|
|
chip->xfer_buf[0] = cpu_to_be16(reg); |
|
chip->xfer_buf[1] = cpu_to_be16(data); |
|
|
|
error = i2c_master_send(client, (u8 *)chip->xfer_buf, |
|
2 * sizeof(*chip->xfer_buf)); |
|
if (unlikely(error < 0)) { |
|
dev_err(&client->dev, "I2C write error: %d\n", error); |
|
return error; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int ad714x_i2c_read(struct ad714x_chip *chip, |
|
unsigned short reg, unsigned short *data, size_t len) |
|
{ |
|
struct i2c_client *client = to_i2c_client(chip->dev); |
|
int i; |
|
int error; |
|
|
|
chip->xfer_buf[0] = cpu_to_be16(reg); |
|
|
|
error = i2c_master_send(client, (u8 *)chip->xfer_buf, |
|
sizeof(*chip->xfer_buf)); |
|
if (error >= 0) |
|
error = i2c_master_recv(client, (u8 *)chip->xfer_buf, |
|
len * sizeof(*chip->xfer_buf)); |
|
|
|
if (unlikely(error < 0)) { |
|
dev_err(&client->dev, "I2C read error: %d\n", error); |
|
return error; |
|
} |
|
|
|
for (i = 0; i < len; i++) |
|
data[i] = be16_to_cpu(chip->xfer_buf[i]); |
|
|
|
return 0; |
|
} |
|
|
|
static int 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 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", |
|
.pm = &ad714x_i2c_pm, |
|
}, |
|
.probe = ad714x_i2c_probe, |
|
.id_table = ad714x_id, |
|
}; |
|
|
|
module_i2c_driver(ad714x_i2c_driver); |
|
|
|
MODULE_DESCRIPTION("Analog Devices AD714X Capacitance Touch Sensor I2C Bus Driver"); |
|
MODULE_AUTHOR("Barry Song <[email protected]>"); |
|
MODULE_LICENSE("GPL");
|
|
|