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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* ADLX345/346 Three-Axis Digital Accelerometers (I2C Interface)
*
* Enter bugs at http://blackfin.uclinux.org/
*
* Copyright (C) 2009 Michael Hennerich, Analog Devices Inc.
*/
#include <linux/input.h> /* BUS_I2C */
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/types.h>
#include <linux/pm.h>
#include "adxl34x.h"
static int adxl34x_smbus_read(struct device *dev, unsigned char reg)
{
struct i2c_client *client = to_i2c_client(dev);
return i2c_smbus_read_byte_data(client, reg);
}
static int adxl34x_smbus_write(struct device *dev,
unsigned char reg, unsigned char val)
{
struct i2c_client *client = to_i2c_client(dev);
return i2c_smbus_write_byte_data(client, reg, val);
}
static int adxl34x_smbus_read_block(struct device *dev,
unsigned char reg, int count,
void *buf)
{
struct i2c_client *client = to_i2c_client(dev);
return i2c_smbus_read_i2c_block_data(client, reg, count, buf);
}
static int adxl34x_i2c_read_block(struct device *dev,
unsigned char reg, int count,
void *buf)
{
struct i2c_client *client = to_i2c_client(dev);
int ret;
ret = i2c_master_send(client, ®, 1);
if (ret < 0)
return ret;
ret = i2c_master_recv(client, buf, count);
if (ret < 0)
return ret;
if (ret != count)
return -EIO;
return 0;
}
static const struct adxl34x_bus_ops adxl34x_smbus_bops = {
.bustype = BUS_I2C,
.write = adxl34x_smbus_write,
.read = adxl34x_smbus_read,
.read_block = adxl34x_smbus_read_block,
};
static const struct adxl34x_bus_ops adxl34x_i2c_bops = {
.bustype = BUS_I2C,
.write = adxl34x_smbus_write,
.read = adxl34x_smbus_read,
.read_block = adxl34x_i2c_read_block,
};
static int adxl34x_i2c_probe(struct i2c_client *client)
{
struct adxl34x *ac;
int error;
error = i2c_check_functionality(client->adapter,
I2C_FUNC_SMBUS_BYTE_DATA);
if (!error) {
dev_err(&client->dev, "SMBUS Byte Data not Supported\n");
return -EIO;
}
ac = adxl34x_probe(&client->dev, client->irq, false,
i2c_check_functionality(client->adapter,
I2C_FUNC_SMBUS_READ_I2C_BLOCK) ?
&adxl34x_smbus_bops : &adxl34x_i2c_bops);
if (IS_ERR(ac))
return PTR_ERR(ac);
i2c_set_clientdata(client, ac);
return 0;
}
static const struct i2c_device_id adxl34x_id[] = {
{ "adxl34x" },
{ }
};
MODULE_DEVICE_TABLE(i2c, adxl34x_id);
static const struct of_device_id adxl34x_of_id[] = {
/*
* The ADXL346 is backward-compatible with the ADXL345. Differences are
* handled by runtime detection of the device model, there's thus no
* need for listing the "adi,adxl346" compatible value explicitly.
*/
{ .compatible = "adi,adxl345", },
/*
* Deprecated, DT nodes should use one or more of the device-specific
* compatible values "adi,adxl345" and "adi,adxl346".
*/
{ .compatible = "adi,adxl34x", },
{ }
};
MODULE_DEVICE_TABLE(of, adxl34x_of_id);
static struct i2c_driver adxl34x_driver = {
.driver = {
.name = "adxl34x",
.dev_groups = adxl34x_groups,
.pm = pm_sleep_ptr(&adxl34x_pm),
.of_match_table = adxl34x_of_id,
},
.probe = adxl34x_i2c_probe,
.id_table = adxl34x_id,
};
module_i2c_driver(adxl34x_driver);
MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
MODULE_DESCRIPTION("ADXL345/346 Three-Axis Digital Accelerometer I2C Bus Driver");
MODULE_LICENSE("GPL");
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