156 lines
3.4 KiB
C
156 lines
3.4 KiB
C
/*
|
|
* ADLX345/346 Three-Axis Digital Accelerometers (I2C Interface)
|
|
*
|
|
* Enter bugs at http://blackfin.uclinux.org/
|
|
*
|
|
* Copyright (C) 2009 Michael Hennerich, Analog Devices Inc.
|
|
* Licensed under the GPL-2 or later.
|
|
*/
|
|
|
|
#include <linux/input.h> /* BUS_I2C */
|
|
#include <linux/i2c.h>
|
|
#include <linux/module.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,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
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 int adxl34x_i2c_remove(struct i2c_client *client)
|
|
{
|
|
struct adxl34x *ac = i2c_get_clientdata(client);
|
|
|
|
return adxl34x_remove(ac);
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int adxl34x_i2c_suspend(struct device *dev)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct adxl34x *ac = i2c_get_clientdata(client);
|
|
|
|
adxl34x_suspend(ac);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int adxl34x_i2c_resume(struct device *dev)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct adxl34x *ac = i2c_get_clientdata(client);
|
|
|
|
adxl34x_resume(ac);
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static SIMPLE_DEV_PM_OPS(adxl34x_i2c_pm, adxl34x_i2c_suspend,
|
|
adxl34x_i2c_resume);
|
|
|
|
static const struct i2c_device_id adxl34x_id[] = {
|
|
{ "adxl34x", 0 },
|
|
{ }
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(i2c, adxl34x_id);
|
|
|
|
static struct i2c_driver adxl34x_driver = {
|
|
.driver = {
|
|
.name = "adxl34x",
|
|
.owner = THIS_MODULE,
|
|
.pm = &adxl34x_i2c_pm,
|
|
},
|
|
.probe = adxl34x_i2c_probe,
|
|
.remove = adxl34x_i2c_remove,
|
|
.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");
|