dm thin metadata: fix __udivdi3 undefined on 32-bit
[linux/fpc-iii.git] / drivers / input / misc / adxl34x-i2c.c
bloba8b0a2eec344e863bd292251095a4e84f3a0b98b
1 /*
2 * ADLX345/346 Three-Axis Digital Accelerometers (I2C Interface)
4 * Enter bugs at http://blackfin.uclinux.org/
6 * Copyright (C) 2009 Michael Hennerich, Analog Devices Inc.
7 * Licensed under the GPL-2 or later.
8 */
10 #include <linux/input.h> /* BUS_I2C */
11 #include <linux/i2c.h>
12 #include <linux/module.h>
13 #include <linux/of.h>
14 #include <linux/types.h>
15 #include <linux/pm.h>
16 #include "adxl34x.h"
18 static int adxl34x_smbus_read(struct device *dev, unsigned char reg)
20 struct i2c_client *client = to_i2c_client(dev);
22 return i2c_smbus_read_byte_data(client, reg);
25 static int adxl34x_smbus_write(struct device *dev,
26 unsigned char reg, unsigned char val)
28 struct i2c_client *client = to_i2c_client(dev);
30 return i2c_smbus_write_byte_data(client, reg, val);
33 static int adxl34x_smbus_read_block(struct device *dev,
34 unsigned char reg, int count,
35 void *buf)
37 struct i2c_client *client = to_i2c_client(dev);
39 return i2c_smbus_read_i2c_block_data(client, reg, count, buf);
42 static int adxl34x_i2c_read_block(struct device *dev,
43 unsigned char reg, int count,
44 void *buf)
46 struct i2c_client *client = to_i2c_client(dev);
47 int ret;
49 ret = i2c_master_send(client, &reg, 1);
50 if (ret < 0)
51 return ret;
53 ret = i2c_master_recv(client, buf, count);
54 if (ret < 0)
55 return ret;
57 if (ret != count)
58 return -EIO;
60 return 0;
63 static const struct adxl34x_bus_ops adxl34x_smbus_bops = {
64 .bustype = BUS_I2C,
65 .write = adxl34x_smbus_write,
66 .read = adxl34x_smbus_read,
67 .read_block = adxl34x_smbus_read_block,
70 static const struct adxl34x_bus_ops adxl34x_i2c_bops = {
71 .bustype = BUS_I2C,
72 .write = adxl34x_smbus_write,
73 .read = adxl34x_smbus_read,
74 .read_block = adxl34x_i2c_read_block,
77 static int adxl34x_i2c_probe(struct i2c_client *client,
78 const struct i2c_device_id *id)
80 struct adxl34x *ac;
81 int error;
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;
90 ac = adxl34x_probe(&client->dev, client->irq, false,
91 i2c_check_functionality(client->adapter,
92 I2C_FUNC_SMBUS_READ_I2C_BLOCK) ?
93 &adxl34x_smbus_bops : &adxl34x_i2c_bops);
94 if (IS_ERR(ac))
95 return PTR_ERR(ac);
97 i2c_set_clientdata(client, ac);
99 return 0;
102 static int adxl34x_i2c_remove(struct i2c_client *client)
104 struct adxl34x *ac = i2c_get_clientdata(client);
106 return adxl34x_remove(ac);
109 static int __maybe_unused adxl34x_i2c_suspend(struct device *dev)
111 struct i2c_client *client = to_i2c_client(dev);
112 struct adxl34x *ac = i2c_get_clientdata(client);
114 adxl34x_suspend(ac);
116 return 0;
119 static int __maybe_unused adxl34x_i2c_resume(struct device *dev)
121 struct i2c_client *client = to_i2c_client(dev);
122 struct adxl34x *ac = i2c_get_clientdata(client);
124 adxl34x_resume(ac);
126 return 0;
129 static SIMPLE_DEV_PM_OPS(adxl34x_i2c_pm, adxl34x_i2c_suspend,
130 adxl34x_i2c_resume);
132 static const struct i2c_device_id adxl34x_id[] = {
133 { "adxl34x", 0 },
137 MODULE_DEVICE_TABLE(i2c, adxl34x_id);
139 #ifdef CONFIG_OF
140 static const struct of_device_id adxl34x_of_id[] = {
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.
146 { .compatible = "adi,adxl345", },
148 * Deprecated, DT nodes should use one or more of the device-specific
149 * compatible values "adi,adxl345" and "adi,adxl346".
151 { .compatible = "adi,adxl34x", },
155 MODULE_DEVICE_TABLE(of, adxl34x_of_id);
156 #endif
158 static struct i2c_driver adxl34x_driver = {
159 .driver = {
160 .name = "adxl34x",
161 .pm = &adxl34x_i2c_pm,
162 .of_match_table = of_match_ptr(adxl34x_of_id),
164 .probe = adxl34x_i2c_probe,
165 .remove = adxl34x_i2c_remove,
166 .id_table = adxl34x_id,
169 module_i2c_driver(adxl34x_driver);
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");