1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Implements I2C interface for VTI CMA300_D0x Accelerometer driver
4 *
5 * Copyright (C) 2010 Texas Instruments
6 * Author: Hemanth V <hemanthv@ti.com>
7 */
8
9#include <linux/module.h>
10#include <linux/i2c.h>
11#include <linux/input/cma3000.h>
12#include "cma3000_d0x.h"
13
14static int cma3000_i2c_set(struct device *dev,
15 u8 reg, u8 val, char *msg)
16{
17 struct i2c_client *client = to_i2c_client(dev);
18 int ret;
19
20 ret = i2c_smbus_write_byte_data(client, command: reg, value: val);
21 if (ret < 0)
22 dev_err(&client->dev,
23 "%s failed (%s, %d)\n", __func__, msg, ret);
24 return ret;
25}
26
27static int cma3000_i2c_read(struct device *dev, u8 reg, char *msg)
28{
29 struct i2c_client *client = to_i2c_client(dev);
30 int ret;
31
32 ret = i2c_smbus_read_byte_data(client, command: reg);
33 if (ret < 0)
34 dev_err(&client->dev,
35 "%s failed (%s, %d)\n", __func__, msg, ret);
36 return ret;
37}
38
39static const struct cma3000_bus_ops cma3000_i2c_bops = {
40 .bustype = BUS_I2C,
41#define CMA3000_BUSI2C (0 << 4)
42 .ctrl_mod = CMA3000_BUSI2C,
43 .read = cma3000_i2c_read,
44 .write = cma3000_i2c_set,
45};
46
47static int cma3000_i2c_probe(struct i2c_client *client)
48{
49 struct cma3000_accl_data *data;
50
51 data = cma3000_init(dev: &client->dev, irq: client->irq, bops: &cma3000_i2c_bops);
52 if (IS_ERR(ptr: data))
53 return PTR_ERR(ptr: data);
54
55 i2c_set_clientdata(client, data);
56
57 return 0;
58}
59
60static void cma3000_i2c_remove(struct i2c_client *client)
61{
62 struct cma3000_accl_data *data = i2c_get_clientdata(client);
63
64 cma3000_exit(data);
65}
66
67static int cma3000_i2c_suspend(struct device *dev)
68{
69 struct i2c_client *client = to_i2c_client(dev);
70 struct cma3000_accl_data *data = i2c_get_clientdata(client);
71
72 cma3000_suspend(data);
73
74 return 0;
75}
76
77static int cma3000_i2c_resume(struct device *dev)
78{
79 struct i2c_client *client = to_i2c_client(dev);
80 struct cma3000_accl_data *data = i2c_get_clientdata(client);
81
82 cma3000_resume(data);
83
84 return 0;
85}
86
87static const struct dev_pm_ops cma3000_i2c_pm_ops = {
88 .suspend = cma3000_i2c_suspend,
89 .resume = cma3000_i2c_resume,
90};
91
92static const struct i2c_device_id cma3000_i2c_id[] = {
93 { "cma3000_d01" },
94 { }
95};
96
97MODULE_DEVICE_TABLE(i2c, cma3000_i2c_id);
98
99static struct i2c_driver cma3000_i2c_driver = {
100 .probe = cma3000_i2c_probe,
101 .remove = cma3000_i2c_remove,
102 .id_table = cma3000_i2c_id,
103 .driver = {
104 .name = "cma3000_i2c_accl",
105 .pm = pm_sleep_ptr(&cma3000_i2c_pm_ops),
106 },
107};
108
109module_i2c_driver(cma3000_i2c_driver);
110
111MODULE_DESCRIPTION("CMA3000-D0x Accelerometer I2C Driver");
112MODULE_LICENSE("GPL");
113MODULE_AUTHOR("Hemanth V <hemanthv@ti.com>");
114

source code of linux/drivers/input/misc/cma3000_d0x_i2c.c