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> | |
3a38958d | 13 | #include <linux/of.h> |
e27c7292 | 14 | #include <linux/types.h> |
fbb89935 | 15 | #include <linux/pm.h> |
e27c7292 MH |
16 | #include "adxl34x.h" |
17 | ||
18 | static int adxl34x_smbus_read(struct device *dev, unsigned char reg) | |
19 | { | |
20 | struct i2c_client *client = to_i2c_client(dev); | |
21 | ||
22 | return i2c_smbus_read_byte_data(client, reg); | |
23 | } | |
24 | ||
25 | static int adxl34x_smbus_write(struct device *dev, | |
26 | unsigned char reg, unsigned char val) | |
27 | { | |
28 | struct i2c_client *client = to_i2c_client(dev); | |
29 | ||
30 | return i2c_smbus_write_byte_data(client, reg, val); | |
31 | } | |
32 | ||
33 | static int adxl34x_smbus_read_block(struct device *dev, | |
34 | unsigned char reg, int count, | |
35 | void *buf) | |
36 | { | |
37 | struct i2c_client *client = to_i2c_client(dev); | |
38 | ||
39 | return i2c_smbus_read_i2c_block_data(client, reg, count, buf); | |
40 | } | |
41 | ||
42 | static int adxl34x_i2c_read_block(struct device *dev, | |
43 | unsigned char reg, int count, | |
44 | void *buf) | |
45 | { | |
46 | struct i2c_client *client = to_i2c_client(dev); | |
47 | int ret; | |
48 | ||
49 | ret = i2c_master_send(client, ®, 1); | |
50 | if (ret < 0) | |
51 | return ret; | |
52 | ||
53 | ret = i2c_master_recv(client, buf, count); | |
54 | if (ret < 0) | |
55 | return ret; | |
56 | ||
57 | if (ret != count) | |
58 | return -EIO; | |
59 | ||
60 | return 0; | |
61 | } | |
62 | ||
af6e1d99 | 63 | static const struct adxl34x_bus_ops adxl34x_smbus_bops = { |
e27c7292 MH |
64 | .bustype = BUS_I2C, |
65 | .write = adxl34x_smbus_write, | |
66 | .read = adxl34x_smbus_read, | |
67 | .read_block = adxl34x_smbus_read_block, | |
68 | }; | |
69 | ||
af6e1d99 | 70 | static const struct adxl34x_bus_ops adxl34x_i2c_bops = { |
e27c7292 MH |
71 | .bustype = BUS_I2C, |
72 | .write = adxl34x_smbus_write, | |
73 | .read = adxl34x_smbus_read, | |
74 | .read_block = adxl34x_i2c_read_block, | |
75 | }; | |
76 | ||
5298cc4c | 77 | static int adxl34x_i2c_probe(struct i2c_client *client, |
e27c7292 MH |
78 | const struct i2c_device_id *id) |
79 | { | |
80 | struct adxl34x *ac; | |
81 | int error; | |
82 | ||
83 | error = i2c_check_functionality(client->adapter, | |
84 | I2C_FUNC_SMBUS_BYTE_DATA); | |
85 | if (!error) { | |
86 | dev_err(&client->dev, "SMBUS Byte Data not Supported\n"); | |
87 | return -EIO; | |
88 | } | |
89 | ||
90 | ac = adxl34x_probe(&client->dev, client->irq, false, | |
91 | i2c_check_functionality(client->adapter, | |
92 | I2C_FUNC_SMBUS_READ_I2C_BLOCK) ? | |
af6e1d99 | 93 | &adxl34x_smbus_bops : &adxl34x_i2c_bops); |
e27c7292 MH |
94 | if (IS_ERR(ac)) |
95 | return PTR_ERR(ac); | |
96 | ||
97 | i2c_set_clientdata(client, ac); | |
98 | ||
99 | return 0; | |
100 | } | |
101 | ||
e2619cf7 | 102 | static int adxl34x_i2c_remove(struct i2c_client *client) |
e27c7292 MH |
103 | { |
104 | struct adxl34x *ac = i2c_get_clientdata(client); | |
105 | ||
106 | return adxl34x_remove(ac); | |
107 | } | |
108 | ||
97a652a8 | 109 | static int __maybe_unused 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 | ||
97a652a8 | 119 | static int __maybe_unused 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 | 128 | |
fbb89935 MB |
129 | static SIMPLE_DEV_PM_OPS(adxl34x_i2c_pm, adxl34x_i2c_suspend, |
130 | adxl34x_i2c_resume); | |
131 | ||
e27c7292 MH |
132 | static const struct i2c_device_id adxl34x_id[] = { |
133 | { "adxl34x", 0 }, | |
134 | { } | |
135 | }; | |
136 | ||
137 | MODULE_DEVICE_TABLE(i2c, adxl34x_id); | |
138 | ||
3a38958d LP |
139 | #ifdef CONFIG_OF |
140 | static const struct of_device_id adxl34x_of_id[] = { | |
141 | /* | |
142 | * The ADXL346 is backward-compatible with the ADXL345. Differences are | |
143 | * handled by runtime detection of the device model, there's thus no | |
144 | * need for listing the "adi,adxl346" compatible value explicitly. | |
145 | */ | |
146 | { .compatible = "adi,adxl345", }, | |
147 | /* | |
148 | * Deprecated, DT nodes should use one or more of the device-specific | |
149 | * compatible values "adi,adxl345" and "adi,adxl346". | |
150 | */ | |
151 | { .compatible = "adi,adxl34x", }, | |
152 | { } | |
153 | }; | |
154 | ||
155 | MODULE_DEVICE_TABLE(of, adxl34x_of_id); | |
156 | #endif | |
157 | ||
e27c7292 MH |
158 | static struct i2c_driver adxl34x_driver = { |
159 | .driver = { | |
160 | .name = "adxl34x", | |
fbb89935 | 161 | .pm = &adxl34x_i2c_pm, |
3a38958d | 162 | .of_match_table = of_match_ptr(adxl34x_of_id), |
e27c7292 MH |
163 | }, |
164 | .probe = adxl34x_i2c_probe, | |
1cb0aa88 | 165 | .remove = adxl34x_i2c_remove, |
e27c7292 MH |
166 | .id_table = adxl34x_id, |
167 | }; | |
168 | ||
1b92c1cf | 169 | module_i2c_driver(adxl34x_driver); |
e27c7292 MH |
170 | |
171 | MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); | |
172 | MODULE_DESCRIPTION("ADXL345/346 Three-Axis Digital Accelerometer I2C Bus Driver"); | |
173 | MODULE_LICENSE("GPL"); |