1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 * AD714X CapTouch Programmable Controller driver (I2C bus)
  4 *
  5 * Copyright 2009-2011 Analog Devices Inc.
  6 */
  7
  8#include <linux/input.h>	/* BUS_I2C */
  9#include <linux/i2c.h>
 10#include <linux/module.h>
 11#include <linux/types.h>
 12#include <linux/pm.h>
 13#include "ad714x.h"
 14
 15static int __maybe_unused ad714x_i2c_suspend(struct device *dev)
 16{
 17	return ad714x_disable(i2c_get_clientdata(to_i2c_client(dev)));
 18}
 19
 20static int __maybe_unused ad714x_i2c_resume(struct device *dev)
 21{
 22	return ad714x_enable(i2c_get_clientdata(to_i2c_client(dev)));
 23}
 24
 25static SIMPLE_DEV_PM_OPS(ad714x_i2c_pm, ad714x_i2c_suspend, ad714x_i2c_resume);
 26
 27static int ad714x_i2c_write(struct ad714x_chip *chip,
 28			    unsigned short reg, unsigned short data)
 29{
 30	struct i2c_client *client = to_i2c_client(chip->dev);
 31	int error;
 32
 33	chip->xfer_buf[0] = cpu_to_be16(reg);
 34	chip->xfer_buf[1] = cpu_to_be16(data);
 35
 36	error = i2c_master_send(client, (u8 *)chip->xfer_buf,
 37				2 * sizeof(*chip->xfer_buf));
 38	if (unlikely(error < 0)) {
 39		dev_err(&client->dev, "I2C write error: %d\n", error);
 40		return error;
 41	}
 42
 43	return 0;
 44}
 45
 46static int ad714x_i2c_read(struct ad714x_chip *chip,
 47			   unsigned short reg, unsigned short *data, size_t len)
 48{
 49	struct i2c_client *client = to_i2c_client(chip->dev);
 50	int i;
 51	int error;
 52
 53	chip->xfer_buf[0] = cpu_to_be16(reg);
 54
 55	error = i2c_master_send(client, (u8 *)chip->xfer_buf,
 56				sizeof(*chip->xfer_buf));
 57	if (error >= 0)
 58		error = i2c_master_recv(client, (u8 *)chip->xfer_buf,
 59					len * sizeof(*chip->xfer_buf));
 60
 61	if (unlikely(error < 0)) {
 62		dev_err(&client->dev, "I2C read error: %d\n", error);
 63		return error;
 64	}
 65
 66	for (i = 0; i < len; i++)
 67		data[i] = be16_to_cpu(chip->xfer_buf[i]);
 68
 69	return 0;
 70}
 71
 72static int ad714x_i2c_probe(struct i2c_client *client)
 73{
 74	struct ad714x_chip *chip;
 75
 76	chip = ad714x_probe(&client->dev, BUS_I2C, client->irq,
 77			    ad714x_i2c_read, ad714x_i2c_write);
 78	if (IS_ERR(chip))
 79		return PTR_ERR(chip);
 80
 81	i2c_set_clientdata(client, chip);
 82
 83	return 0;
 84}
 85
 86static const struct i2c_device_id ad714x_id[] = {
 87	{ "ad7142_captouch", 0 },
 88	{ "ad7143_captouch", 0 },
 89	{ "ad7147_captouch", 0 },
 90	{ "ad7147a_captouch", 0 },
 91	{ "ad7148_captouch", 0 },
 92	{ }
 93};
 94MODULE_DEVICE_TABLE(i2c, ad714x_id);
 95
 96static struct i2c_driver ad714x_i2c_driver = {
 97	.driver = {
 98		.name = "ad714x_captouch",
 99		.pm   = &ad714x_i2c_pm,
100	},
101	.probe_new = ad714x_i2c_probe,
102	.id_table = ad714x_id,
103};
104
105module_i2c_driver(ad714x_i2c_driver);
106
107MODULE_DESCRIPTION("Analog Devices AD714X Capacitance Touch Sensor I2C Bus Driver");
108MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
109MODULE_LICENSE("GPL");

 1// SPDX-License-Identifier: GPL-2.0-or-later
 2/*
 3 * AD714X CapTouch Programmable Controller driver (I2C bus)
 4 *
 5 * Copyright 2009-2011 Analog Devices Inc.
 6 */
 7
 8#include <linux/input.h>	/* BUS_I2C */
 9#include <linux/i2c.h>
10#include <linux/module.h>
11#include <linux/types.h>
12#include <linux/pm.h>
13#include "ad714x.h"
14
 
 
 
 
 
 
 
 
 
 
 
 
15static int ad714x_i2c_write(struct ad714x_chip *chip,
16			    unsigned short reg, unsigned short data)
17{
18	struct i2c_client *client = to_i2c_client(chip->dev);
19	int error;
20
21	chip->xfer_buf[0] = cpu_to_be16(reg);
22	chip->xfer_buf[1] = cpu_to_be16(data);
23
24	error = i2c_master_send(client, (u8 *)chip->xfer_buf,
25				2 * sizeof(*chip->xfer_buf));
26	if (unlikely(error < 0)) {
27		dev_err(&client->dev, "I2C write error: %d\n", error);
28		return error;
29	}
30
31	return 0;
32}
33
34static int ad714x_i2c_read(struct ad714x_chip *chip,
35			   unsigned short reg, unsigned short *data, size_t len)
36{
37	struct i2c_client *client = to_i2c_client(chip->dev);
38	int i;
39	int error;
40
41	chip->xfer_buf[0] = cpu_to_be16(reg);
42
43	error = i2c_master_send(client, (u8 *)chip->xfer_buf,
44				sizeof(*chip->xfer_buf));
45	if (error >= 0)
46		error = i2c_master_recv(client, (u8 *)chip->xfer_buf,
47					len * sizeof(*chip->xfer_buf));
48
49	if (unlikely(error < 0)) {
50		dev_err(&client->dev, "I2C read error: %d\n", error);
51		return error;
52	}
53
54	for (i = 0; i < len; i++)
55		data[i] = be16_to_cpu(chip->xfer_buf[i]);
56
57	return 0;
58}
59
60static int ad714x_i2c_probe(struct i2c_client *client)
61{
62	struct ad714x_chip *chip;
63
64	chip = ad714x_probe(&client->dev, BUS_I2C, client->irq,
65			    ad714x_i2c_read, ad714x_i2c_write);
66	if (IS_ERR(chip))
67		return PTR_ERR(chip);
68
69	i2c_set_clientdata(client, chip);
70
71	return 0;
72}
73
74static const struct i2c_device_id ad714x_id[] = {
75	{ "ad7142_captouch", 0 },
76	{ "ad7143_captouch", 0 },
77	{ "ad7147_captouch", 0 },
78	{ "ad7147a_captouch", 0 },
79	{ "ad7148_captouch", 0 },
80	{ }
81};
82MODULE_DEVICE_TABLE(i2c, ad714x_id);
83
84static struct i2c_driver ad714x_i2c_driver = {
85	.driver = {
86		.name = "ad714x_captouch",
87		.pm   = pm_sleep_ptr(&ad714x_pm),
88	},
89	.probe = ad714x_i2c_probe,
90	.id_table = ad714x_id,
91};
92
93module_i2c_driver(ad714x_i2c_driver);
94
95MODULE_DESCRIPTION("Analog Devices AD714X Capacitance Touch Sensor I2C Bus Driver");
96MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
97MODULE_LICENSE("GPL");