1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Implements I2C interface for VTI CMA300_D0x Accelerometer driver
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) 2010 Texas Instruments
6*4882a593Smuzhiyun * Author: Hemanth V <hemanthv@ti.com>
7*4882a593Smuzhiyun */
8*4882a593Smuzhiyun
9*4882a593Smuzhiyun #include <linux/module.h>
10*4882a593Smuzhiyun #include <linux/i2c.h>
11*4882a593Smuzhiyun #include <linux/input/cma3000.h>
12*4882a593Smuzhiyun #include "cma3000_d0x.h"
13*4882a593Smuzhiyun
cma3000_i2c_set(struct device * dev,u8 reg,u8 val,char * msg)14*4882a593Smuzhiyun static int cma3000_i2c_set(struct device *dev,
15*4882a593Smuzhiyun u8 reg, u8 val, char *msg)
16*4882a593Smuzhiyun {
17*4882a593Smuzhiyun struct i2c_client *client = to_i2c_client(dev);
18*4882a593Smuzhiyun int ret;
19*4882a593Smuzhiyun
20*4882a593Smuzhiyun ret = i2c_smbus_write_byte_data(client, reg, val);
21*4882a593Smuzhiyun if (ret < 0)
22*4882a593Smuzhiyun dev_err(&client->dev,
23*4882a593Smuzhiyun "%s failed (%s, %d)\n", __func__, msg, ret);
24*4882a593Smuzhiyun return ret;
25*4882a593Smuzhiyun }
26*4882a593Smuzhiyun
cma3000_i2c_read(struct device * dev,u8 reg,char * msg)27*4882a593Smuzhiyun static int cma3000_i2c_read(struct device *dev, u8 reg, char *msg)
28*4882a593Smuzhiyun {
29*4882a593Smuzhiyun struct i2c_client *client = to_i2c_client(dev);
30*4882a593Smuzhiyun int ret;
31*4882a593Smuzhiyun
32*4882a593Smuzhiyun ret = i2c_smbus_read_byte_data(client, reg);
33*4882a593Smuzhiyun if (ret < 0)
34*4882a593Smuzhiyun dev_err(&client->dev,
35*4882a593Smuzhiyun "%s failed (%s, %d)\n", __func__, msg, ret);
36*4882a593Smuzhiyun return ret;
37*4882a593Smuzhiyun }
38*4882a593Smuzhiyun
39*4882a593Smuzhiyun static const struct cma3000_bus_ops cma3000_i2c_bops = {
40*4882a593Smuzhiyun .bustype = BUS_I2C,
41*4882a593Smuzhiyun #define CMA3000_BUSI2C (0 << 4)
42*4882a593Smuzhiyun .ctrl_mod = CMA3000_BUSI2C,
43*4882a593Smuzhiyun .read = cma3000_i2c_read,
44*4882a593Smuzhiyun .write = cma3000_i2c_set,
45*4882a593Smuzhiyun };
46*4882a593Smuzhiyun
cma3000_i2c_probe(struct i2c_client * client,const struct i2c_device_id * id)47*4882a593Smuzhiyun static int cma3000_i2c_probe(struct i2c_client *client,
48*4882a593Smuzhiyun const struct i2c_device_id *id)
49*4882a593Smuzhiyun {
50*4882a593Smuzhiyun struct cma3000_accl_data *data;
51*4882a593Smuzhiyun
52*4882a593Smuzhiyun data = cma3000_init(&client->dev, client->irq, &cma3000_i2c_bops);
53*4882a593Smuzhiyun if (IS_ERR(data))
54*4882a593Smuzhiyun return PTR_ERR(data);
55*4882a593Smuzhiyun
56*4882a593Smuzhiyun i2c_set_clientdata(client, data);
57*4882a593Smuzhiyun
58*4882a593Smuzhiyun return 0;
59*4882a593Smuzhiyun }
60*4882a593Smuzhiyun
cma3000_i2c_remove(struct i2c_client * client)61*4882a593Smuzhiyun static int cma3000_i2c_remove(struct i2c_client *client)
62*4882a593Smuzhiyun {
63*4882a593Smuzhiyun struct cma3000_accl_data *data = i2c_get_clientdata(client);
64*4882a593Smuzhiyun
65*4882a593Smuzhiyun cma3000_exit(data);
66*4882a593Smuzhiyun
67*4882a593Smuzhiyun return 0;
68*4882a593Smuzhiyun }
69*4882a593Smuzhiyun
70*4882a593Smuzhiyun #ifdef CONFIG_PM
cma3000_i2c_suspend(struct device * dev)71*4882a593Smuzhiyun static int cma3000_i2c_suspend(struct device *dev)
72*4882a593Smuzhiyun {
73*4882a593Smuzhiyun struct i2c_client *client = to_i2c_client(dev);
74*4882a593Smuzhiyun struct cma3000_accl_data *data = i2c_get_clientdata(client);
75*4882a593Smuzhiyun
76*4882a593Smuzhiyun cma3000_suspend(data);
77*4882a593Smuzhiyun
78*4882a593Smuzhiyun return 0;
79*4882a593Smuzhiyun }
80*4882a593Smuzhiyun
cma3000_i2c_resume(struct device * dev)81*4882a593Smuzhiyun static int cma3000_i2c_resume(struct device *dev)
82*4882a593Smuzhiyun {
83*4882a593Smuzhiyun struct i2c_client *client = to_i2c_client(dev);
84*4882a593Smuzhiyun struct cma3000_accl_data *data = i2c_get_clientdata(client);
85*4882a593Smuzhiyun
86*4882a593Smuzhiyun cma3000_resume(data);
87*4882a593Smuzhiyun
88*4882a593Smuzhiyun return 0;
89*4882a593Smuzhiyun }
90*4882a593Smuzhiyun
91*4882a593Smuzhiyun static const struct dev_pm_ops cma3000_i2c_pm_ops = {
92*4882a593Smuzhiyun .suspend = cma3000_i2c_suspend,
93*4882a593Smuzhiyun .resume = cma3000_i2c_resume,
94*4882a593Smuzhiyun };
95*4882a593Smuzhiyun #endif
96*4882a593Smuzhiyun
97*4882a593Smuzhiyun static const struct i2c_device_id cma3000_i2c_id[] = {
98*4882a593Smuzhiyun { "cma3000_d01", 0 },
99*4882a593Smuzhiyun { },
100*4882a593Smuzhiyun };
101*4882a593Smuzhiyun
102*4882a593Smuzhiyun MODULE_DEVICE_TABLE(i2c, cma3000_i2c_id);
103*4882a593Smuzhiyun
104*4882a593Smuzhiyun static struct i2c_driver cma3000_i2c_driver = {
105*4882a593Smuzhiyun .probe = cma3000_i2c_probe,
106*4882a593Smuzhiyun .remove = cma3000_i2c_remove,
107*4882a593Smuzhiyun .id_table = cma3000_i2c_id,
108*4882a593Smuzhiyun .driver = {
109*4882a593Smuzhiyun .name = "cma3000_i2c_accl",
110*4882a593Smuzhiyun #ifdef CONFIG_PM
111*4882a593Smuzhiyun .pm = &cma3000_i2c_pm_ops,
112*4882a593Smuzhiyun #endif
113*4882a593Smuzhiyun },
114*4882a593Smuzhiyun };
115*4882a593Smuzhiyun
116*4882a593Smuzhiyun module_i2c_driver(cma3000_i2c_driver);
117*4882a593Smuzhiyun
118*4882a593Smuzhiyun MODULE_DESCRIPTION("CMA3000-D0x Accelerometer I2C Driver");
119*4882a593Smuzhiyun MODULE_LICENSE("GPL");
120*4882a593Smuzhiyun MODULE_AUTHOR("Hemanth V <hemanthv@ti.com>");
121