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b029ffaf H |
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 __devinit 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 __devexit 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 | ||
356c6f65 DT |
113 | MODULE_DEVICE_TABLE(i2c, cma3000_i2c_id); |
114 | ||
b029ffaf H |
115 | static struct i2c_driver cma3000_i2c_driver = { |
116 | .probe = cma3000_i2c_probe, | |
1cb0aa88 | 117 | .remove = cma3000_i2c_remove, |
b029ffaf H |
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 | ||
1b92c1cf | 128 | module_i2c_driver(cma3000_i2c_driver); |
b029ffaf H |
129 | |
130 | MODULE_DESCRIPTION("CMA3000-D0x Accelerometer I2C Driver"); | |
131 | MODULE_LICENSE("GPL"); | |
132 | MODULE_AUTHOR("Hemanth V <hemanthv@ti.com>"); |