Commit | Line | Data |
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e27c7292 MH |
1 | /* |
2 | * ADLX345/346 Three-Axis Digital Accelerometers (I2C Interface) | |
3 | * | |
4 | * Enter bugs at http://blackfin.uclinux.org/ | |
5 | * | |
6 | * Copyright (C) 2009 Michael Hennerich, Analog Devices Inc. | |
7 | * Licensed under the GPL-2 or later. | |
8 | */ | |
9 | ||
10 | #include <linux/input.h> /* BUS_I2C */ | |
11 | #include <linux/i2c.h> | |
12 | #include <linux/module.h> | |
13 | #include <linux/types.h> | |
fbb89935 | 14 | #include <linux/pm.h> |
e27c7292 MH |
15 | #include "adxl34x.h" |
16 | ||
17 | static int adxl34x_smbus_read(struct device *dev, unsigned char reg) | |
18 | { | |
19 | struct i2c_client *client = to_i2c_client(dev); | |
20 | ||
21 | return i2c_smbus_read_byte_data(client, reg); | |
22 | } | |
23 | ||
24 | static int adxl34x_smbus_write(struct device *dev, | |
25 | unsigned char reg, unsigned char val) | |
26 | { | |
27 | struct i2c_client *client = to_i2c_client(dev); | |
28 | ||
29 | return i2c_smbus_write_byte_data(client, reg, val); | |
30 | } | |
31 | ||
32 | static int adxl34x_smbus_read_block(struct device *dev, | |
33 | unsigned char reg, int count, | |
34 | void *buf) | |
35 | { | |
36 | struct i2c_client *client = to_i2c_client(dev); | |
37 | ||
38 | return i2c_smbus_read_i2c_block_data(client, reg, count, buf); | |
39 | } | |
40 | ||
41 | static int adxl34x_i2c_read_block(struct device *dev, | |
42 | unsigned char reg, int count, | |
43 | void *buf) | |
44 | { | |
45 | struct i2c_client *client = to_i2c_client(dev); | |
46 | int ret; | |
47 | ||
48 | ret = i2c_master_send(client, ®, 1); | |
49 | if (ret < 0) | |
50 | return ret; | |
51 | ||
52 | ret = i2c_master_recv(client, buf, count); | |
53 | if (ret < 0) | |
54 | return ret; | |
55 | ||
56 | if (ret != count) | |
57 | return -EIO; | |
58 | ||
59 | return 0; | |
60 | } | |
61 | ||
af6e1d99 | 62 | static const struct adxl34x_bus_ops adxl34x_smbus_bops = { |
e27c7292 MH |
63 | .bustype = BUS_I2C, |
64 | .write = adxl34x_smbus_write, | |
65 | .read = adxl34x_smbus_read, | |
66 | .read_block = adxl34x_smbus_read_block, | |
67 | }; | |
68 | ||
af6e1d99 | 69 | static const struct adxl34x_bus_ops adxl34x_i2c_bops = { |
e27c7292 MH |
70 | .bustype = BUS_I2C, |
71 | .write = adxl34x_smbus_write, | |
72 | .read = adxl34x_smbus_read, | |
73 | .read_block = adxl34x_i2c_read_block, | |
74 | }; | |
75 | ||
76 | static int __devinit adxl34x_i2c_probe(struct i2c_client *client, | |
77 | const struct i2c_device_id *id) | |
78 | { | |
79 | struct adxl34x *ac; | |
80 | int error; | |
81 | ||
82 | error = i2c_check_functionality(client->adapter, | |
83 | I2C_FUNC_SMBUS_BYTE_DATA); | |
84 | if (!error) { | |
85 | dev_err(&client->dev, "SMBUS Byte Data not Supported\n"); | |
86 | return -EIO; | |
87 | } | |
88 | ||
89 | ac = adxl34x_probe(&client->dev, client->irq, false, | |
90 | i2c_check_functionality(client->adapter, | |
91 | I2C_FUNC_SMBUS_READ_I2C_BLOCK) ? | |
af6e1d99 | 92 | &adxl34x_smbus_bops : &adxl34x_i2c_bops); |
e27c7292 MH |
93 | if (IS_ERR(ac)) |
94 | return PTR_ERR(ac); | |
95 | ||
96 | i2c_set_clientdata(client, ac); | |
97 | ||
98 | return 0; | |
99 | } | |
100 | ||
101 | static int __devexit adxl34x_i2c_remove(struct i2c_client *client) | |
102 | { | |
103 | struct adxl34x *ac = i2c_get_clientdata(client); | |
104 | ||
105 | return adxl34x_remove(ac); | |
106 | } | |
107 | ||
108 | #ifdef CONFIG_PM | |
fbb89935 | 109 | static int adxl34x_i2c_suspend(struct device *dev) |
e27c7292 | 110 | { |
fbb89935 | 111 | struct i2c_client *client = to_i2c_client(dev); |
e27c7292 MH |
112 | struct adxl34x *ac = i2c_get_clientdata(client); |
113 | ||
af6e1d99 | 114 | adxl34x_suspend(ac); |
e27c7292 MH |
115 | |
116 | return 0; | |
117 | } | |
118 | ||
fbb89935 | 119 | static int adxl34x_i2c_resume(struct device *dev) |
e27c7292 | 120 | { |
fbb89935 | 121 | struct i2c_client *client = to_i2c_client(dev); |
e27c7292 MH |
122 | struct adxl34x *ac = i2c_get_clientdata(client); |
123 | ||
af6e1d99 | 124 | adxl34x_resume(ac); |
e27c7292 MH |
125 | |
126 | return 0; | |
127 | } | |
e27c7292 MH |
128 | #endif |
129 | ||
fbb89935 MB |
130 | static SIMPLE_DEV_PM_OPS(adxl34x_i2c_pm, adxl34x_i2c_suspend, |
131 | adxl34x_i2c_resume); | |
132 | ||
e27c7292 MH |
133 | static const struct i2c_device_id adxl34x_id[] = { |
134 | { "adxl34x", 0 }, | |
135 | { } | |
136 | }; | |
137 | ||
138 | MODULE_DEVICE_TABLE(i2c, adxl34x_id); | |
139 | ||
140 | static struct i2c_driver adxl34x_driver = { | |
141 | .driver = { | |
142 | .name = "adxl34x", | |
143 | .owner = THIS_MODULE, | |
fbb89935 | 144 | .pm = &adxl34x_i2c_pm, |
e27c7292 MH |
145 | }, |
146 | .probe = adxl34x_i2c_probe, | |
1cb0aa88 | 147 | .remove = adxl34x_i2c_remove, |
e27c7292 MH |
148 | .id_table = adxl34x_id, |
149 | }; | |
150 | ||
1b92c1cf | 151 | module_i2c_driver(adxl34x_driver); |
e27c7292 MH |
152 | |
153 | MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); | |
154 | MODULE_DESCRIPTION("ADXL345/346 Three-Axis Digital Accelerometer I2C Bus Driver"); | |
155 | MODULE_LICENSE("GPL"); |