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.
10 #include <linux/input.h> /* BUS_I2C */
11 #include <linux/i2c.h>
12 #include <linux/module.h>
14 #include <linux/types.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,
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,
46 struct i2c_client *client = to_i2c_client(dev);
49 ret = i2c_master_send(client, ®, 1);
53 ret = i2c_master_recv(client, buf, count);
63 static const struct adxl34x_bus_ops adxl34x_smbus_bops = {
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 = {
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)
83 error = i2c_check_functionality(client->adapter,
84 I2C_FUNC_SMBUS_BYTE_DATA);
86 dev_err(&client->dev, "SMBUS Byte Data not Supported\n");
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);
97 i2c_set_clientdata(client, ac);
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);
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);
129 static SIMPLE_DEV_PM_OPS(adxl34x_i2c_pm, adxl34x_i2c_suspend,
132 static const struct i2c_device_id adxl34x_id[] = {
137 MODULE_DEVICE_TABLE(i2c, adxl34x_id);
139 static const struct of_device_id adxl34x_of_id[] = {
141 * The ADXL346 is backward-compatible with the ADXL345. Differences are
142 * handled by runtime detection of the device model, there's thus no
143 * need for listing the "adi,adxl346" compatible value explicitly.
145 { .compatible = "adi,adxl345", },
147 * Deprecated, DT nodes should use one or more of the device-specific
148 * compatible values "adi,adxl345" and "adi,adxl346".
150 { .compatible = "adi,adxl34x", },
154 MODULE_DEVICE_TABLE(of, adxl34x_of_id);
156 static struct i2c_driver adxl34x_driver = {
159 .pm = &adxl34x_i2c_pm,
160 .of_match_table = adxl34x_of_id,
162 .probe = adxl34x_i2c_probe,
163 .remove = adxl34x_i2c_remove,
164 .id_table = adxl34x_id,
167 module_i2c_driver(adxl34x_driver);
169 MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
170 MODULE_DESCRIPTION("ADXL345/346 Three-Axis Digital Accelerometer I2C Bus Driver");
171 MODULE_LICENSE("GPL");