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1 | /* |
2 | * Implements I2C interface for VTI CMA300_D0x Accelerometer driver |
3 | * |
4 | * Copyright (C) 2010 Texas Instruments |
5 | * Author: Hemanth V <hemanthv@ti.com> |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify it |
8 | * under the terms of the GNU General Public License version 2 as published by |
9 | * the Free Software Foundation. |
10 | * |
11 | * This program is distributed in the hope that it will be useful, but WITHOUT |
12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
14 | * more details. |
15 | * |
16 | * You should have received a copy of the GNU General Public License along with |
17 | * this program. If not, see <http://www.gnu.org/licenses/>. |
18 | */ |
19 | |
20 | #include <linux/module.h> |
21 | #include <linux/i2c.h> |
22 | #include <linux/input/cma3000.h> |
23 | #include "cma3000_d0x.h" |
24 | |
25 | static int cma3000_i2c_set(struct device *dev, |
26 | u8 reg, u8 val, char *msg) |
27 | { |
28 | struct i2c_client *client = to_i2c_client(dev); |
29 | int ret; |
30 | |
31 | ret = i2c_smbus_write_byte_data(client, reg, val); |
32 | if (ret < 0) |
33 | dev_err(&client->dev, |
34 | "%s failed (%s, %d)\n", __func__, msg, ret); |
35 | return ret; |
36 | } |
37 | |
38 | static int cma3000_i2c_read(struct device *dev, u8 reg, char *msg) |
39 | { |
40 | struct i2c_client *client = to_i2c_client(dev); |
41 | int ret; |
42 | |
43 | ret = i2c_smbus_read_byte_data(client, reg); |
44 | if (ret < 0) |
45 | dev_err(&client->dev, |
46 | "%s failed (%s, %d)\n", __func__, msg, ret); |
47 | return ret; |
48 | } |
49 | |
50 | static const struct cma3000_bus_ops cma3000_i2c_bops = { |
51 | .bustype = BUS_I2C, |
52 | #define CMA3000_BUSI2C (0 << 4) |
53 | .ctrl_mod = CMA3000_BUSI2C, |
54 | .read = cma3000_i2c_read, |
55 | .write = cma3000_i2c_set, |
56 | }; |
57 | |
58 | static int cma3000_i2c_probe(struct i2c_client *client, |
59 | const struct i2c_device_id *id) |
60 | { |
61 | struct cma3000_accl_data *data; |
62 | |
63 | data = cma3000_init(&client->dev, client->irq, &cma3000_i2c_bops); |
64 | if (IS_ERR(data)) |
65 | return PTR_ERR(data); |
66 | |
67 | i2c_set_clientdata(client, data); |
68 | |
69 | return 0; |
70 | } |
71 | |
72 | static int cma3000_i2c_remove(struct i2c_client *client) |
73 | { |
74 | struct cma3000_accl_data *data = i2c_get_clientdata(client); |
75 | |
76 | cma3000_exit(data); |
77 | |
78 | return 0; |
79 | } |
80 | |
81 | #ifdef CONFIG_PM |
82 | static int cma3000_i2c_suspend(struct device *dev) |
83 | { |
84 | struct i2c_client *client = to_i2c_client(dev); |
85 | struct cma3000_accl_data *data = i2c_get_clientdata(client); |
86 | |
87 | cma3000_suspend(data); |
88 | |
89 | return 0; |
90 | } |
91 | |
92 | static int cma3000_i2c_resume(struct device *dev) |
93 | { |
94 | struct i2c_client *client = to_i2c_client(dev); |
95 | struct cma3000_accl_data *data = i2c_get_clientdata(client); |
96 | |
97 | cma3000_resume(data); |
98 | |
99 | return 0; |
100 | } |
101 | |
102 | static const struct dev_pm_ops cma3000_i2c_pm_ops = { |
103 | .suspend = cma3000_i2c_suspend, |
104 | .resume = cma3000_i2c_resume, |
105 | }; |
106 | #endif |
107 | |
108 | static const struct i2c_device_id cma3000_i2c_id[] = { |
109 | { "cma3000_d01", 0 }, |
110 | { }, |
111 | }; |
112 | |
113 | MODULE_DEVICE_TABLE(i2c, cma3000_i2c_id); |
114 | |
115 | static struct i2c_driver cma3000_i2c_driver = { |
116 | .probe = cma3000_i2c_probe, |
117 | .remove = cma3000_i2c_remove, |
118 | .id_table = cma3000_i2c_id, |
119 | .driver = { |
120 | .name = "cma3000_i2c_accl", |
121 | .owner = THIS_MODULE, |
122 | #ifdef CONFIG_PM |
123 | .pm = &cma3000_i2c_pm_ops, |
124 | #endif |
125 | }, |
126 | }; |
127 | |
128 | module_i2c_driver(cma3000_i2c_driver); |
129 | |
130 | MODULE_DESCRIPTION("CMA3000-D0x Accelerometer I2C Driver"); |
131 | MODULE_LICENSE("GPL"); |
132 | MODULE_AUTHOR("Hemanth V <hemanthv@ti.com>"); |
133 |
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