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, reg, 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, 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					const struct i2c_device_id *id)
49{
50	struct cma3000_accl_data *data;
51
52	data = cma3000_init(&client->dev, client->irq, &cma3000_i2c_bops);
53	if (IS_ERR(data))
54		return PTR_ERR(data);
55
56	i2c_set_clientdata(client, data);
57
58	return 0;
59}
60
61static int cma3000_i2c_remove(struct i2c_client *client)
62{
63	struct cma3000_accl_data *data = i2c_get_clientdata(client);
64
65	cma3000_exit(data);
66
67	return 0;
68}
69
70#ifdef CONFIG_PM
71static int cma3000_i2c_suspend(struct device *dev)
72{
73	struct i2c_client *client = to_i2c_client(dev);
74	struct cma3000_accl_data *data = i2c_get_clientdata(client);
75
76	cma3000_suspend(data);
77
78	return 0;
79}
80
81static int cma3000_i2c_resume(struct device *dev)
82{
83	struct i2c_client *client = to_i2c_client(dev);
84	struct cma3000_accl_data *data = i2c_get_clientdata(client);
85
86	cma3000_resume(data);
87
88	return 0;
89}
90
91static const struct dev_pm_ops cma3000_i2c_pm_ops = {
92	.suspend	= cma3000_i2c_suspend,
93	.resume		= cma3000_i2c_resume,
94};
95#endif
96
97static const struct i2c_device_id cma3000_i2c_id[] = {
98	{ "cma3000_d01", 0 },
99	{ },
100};
101
102MODULE_DEVICE_TABLE(i2c, cma3000_i2c_id);
103
104static struct i2c_driver cma3000_i2c_driver = {
105	.probe		= cma3000_i2c_probe,
106	.remove		= cma3000_i2c_remove,
107	.id_table	= cma3000_i2c_id,
108	.driver = {
109		.name	= "cma3000_i2c_accl",
110#ifdef CONFIG_PM
111		.pm	= &cma3000_i2c_pm_ops,
112#endif
113	},
114};
115
116module_i2c_driver(cma3000_i2c_driver);
117
118MODULE_DESCRIPTION("CMA3000-D0x Accelerometer I2C Driver");
119MODULE_LICENSE("GPL");
120MODULE_AUTHOR("Hemanth V <hemanthv@ti.com>");
121