1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * ADLX345/346 Three-Axis Digital Accelerometers (I2C Interface)
5 * Enter bugs at http://blackfin.uclinux.org/
7 * Copyright (C) 2009 Michael Hennerich, Analog Devices Inc.
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)
82 error = i2c_check_functionality(client->adapter,
83 I2C_FUNC_SMBUS_BYTE_DATA);
85 dev_err(&client->dev, "SMBUS Byte Data not Supported\n");
89 ac = adxl34x_probe(&client->dev, client->irq, false,
90 i2c_check_functionality(client->adapter,
91 I2C_FUNC_SMBUS_READ_I2C_BLOCK) ?
92 &adxl34x_smbus_bops : &adxl34x_i2c_bops);
96 i2c_set_clientdata(client, ac);
101 static void adxl34x_i2c_remove(struct i2c_client *client)
103 struct adxl34x *ac = i2c_get_clientdata(client);
108 static const struct i2c_device_id adxl34x_id[] = {
113 MODULE_DEVICE_TABLE(i2c, adxl34x_id);
115 static const struct of_device_id adxl34x_of_id[] = {
117 * The ADXL346 is backward-compatible with the ADXL345. Differences are
118 * handled by runtime detection of the device model, there's thus no
119 * need for listing the "adi,adxl346" compatible value explicitly.
121 { .compatible = "adi,adxl345", },
123 * Deprecated, DT nodes should use one or more of the device-specific
124 * compatible values "adi,adxl345" and "adi,adxl346".
126 { .compatible = "adi,adxl34x", },
130 MODULE_DEVICE_TABLE(of, adxl34x_of_id);
132 static struct i2c_driver adxl34x_driver = {
135 .pm = pm_sleep_ptr(&adxl34x_pm),
136 .of_match_table = adxl34x_of_id,
138 .probe_new = adxl34x_i2c_probe,
139 .remove = adxl34x_i2c_remove,
140 .id_table = adxl34x_id,
143 module_i2c_driver(adxl34x_driver);
146 MODULE_DESCRIPTION("ADXL345/346 Three-Axis Digital Accelerometer I2C Bus Driver");
147 MODULE_LICENSE("GPL");