[deliverable/linux.git] / drivers / input / misc / adxl34x-i2c.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, &reg, 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_SLEEP
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");
Commit	Line	Data
e27c7292 MH	1	/*
	2	* ADLX345/346 Three-Axis Digital Accelerometers (I2C Interface)
	3	*
	4	* Enter bugs at http://blackfin.uclinux.org/
	5	*
	6	* Copyright (C) 2009 Michael Hennerich, Analog Devices Inc.
	7	* Licensed under the GPL-2 or later.
	8	*/
	9
	10	#include <linux/input.h> /* BUS_I2C */
	11	#include <linux/i2c.h>
	12	#include <linux/module.h>
	13	#include <linux/types.h>
fbb89935	14	#include <linux/pm.h>
e27c7292 MH	15	#include "adxl34x.h"
	16
	17	static int adxl34x_smbus_read(struct device *dev, unsigned char reg)
	18	{
	19	struct i2c_client *client = to_i2c_client(dev);
	20
	21	return i2c_smbus_read_byte_data(client, reg);
	22	}
	23
	24	static int adxl34x_smbus_write(struct device *dev,
	25	unsigned char reg, unsigned char val)
	26	{
	27	struct i2c_client *client = to_i2c_client(dev);
	28
	29	return i2c_smbus_write_byte_data(client, reg, val);
	30	}
	31
	32	static int adxl34x_smbus_read_block(struct device *dev,
	33	unsigned char reg, int count,
	34	void *buf)
	35	{
	36	struct i2c_client *client = to_i2c_client(dev);
	37
	38	return i2c_smbus_read_i2c_block_data(client, reg, count, buf);
	39	}
	40
	41	static int adxl34x_i2c_read_block(struct device *dev,
	42	unsigned char reg, int count,
	43	void *buf)
	44	{
	45	struct i2c_client *client = to_i2c_client(dev);
	46	int ret;
	47
	48	ret = i2c_master_send(client, &reg, 1);
	49	if (ret < 0)
	50	return ret;
	51
	52	ret = i2c_master_recv(client, buf, count);
	53	if (ret < 0)
	54	return ret;
	55
	56	if (ret != count)
	57	return -EIO;
	58
	59	return 0;
	60	}
	61
af6e1d99	62	static const struct adxl34x_bus_ops adxl34x_smbus_bops = {
e27c7292 MH	63	.bustype = BUS_I2C,
	64	.write = adxl34x_smbus_write,
	65	.read = adxl34x_smbus_read,
	66	.read_block = adxl34x_smbus_read_block,
	67	};
	68
af6e1d99	69	static const struct adxl34x_bus_ops adxl34x_i2c_bops = {
e27c7292 MH	70	.bustype = BUS_I2C,
	71	.write = adxl34x_smbus_write,
	72	.read = adxl34x_smbus_read,
	73	.read_block = adxl34x_i2c_read_block,
	74	};
	75
5298cc4c	76	static int adxl34x_i2c_probe(struct i2c_client *client,
e27c7292 MH	77	const struct i2c_device_id *id)
	78	{
	79	struct adxl34x *ac;
	80	int error;
	81
	82	error = i2c_check_functionality(client->adapter,
	83	I2C_FUNC_SMBUS_BYTE_DATA);
	84	if (!error) {
	85	dev_err(&client->dev, "SMBUS Byte Data not Supported\n");
	86	return -EIO;
	87	}
	88
	89	ac = adxl34x_probe(&client->dev, client->irq, false,
	90	i2c_check_functionality(client->adapter,
	91	I2C_FUNC_SMBUS_READ_I2C_BLOCK) ?
af6e1d99	92	&adxl34x_smbus_bops : &adxl34x_i2c_bops);
e27c7292 MH	93	if (IS_ERR(ac))
	94	return PTR_ERR(ac);
	95
	96	i2c_set_clientdata(client, ac);
	97
	98	return 0;
	99	}
	100
e2619cf7	101	static int adxl34x_i2c_remove(struct i2c_client *client)
e27c7292 MH	102	{
	103	struct adxl34x *ac = i2c_get_clientdata(client);
	104
	105	return adxl34x_remove(ac);
	106	}
	107
2b1c0d50	108	#ifdef CONFIG_PM_SLEEP
fbb89935	109	static int adxl34x_i2c_suspend(struct device *dev)
e27c7292	110	{
fbb89935	111	struct i2c_client *client = to_i2c_client(dev);
e27c7292 MH	112	struct adxl34x *ac = i2c_get_clientdata(client);
e27c7292 MH	113
af6e1d99	114	adxl34x_suspend(ac);
e27c7292 MH	115
	116	return 0;
	117	}
	118
fbb89935	119	static int adxl34x_i2c_resume(struct device *dev)
e27c7292	120	{
fbb89935	121	struct i2c_client *client = to_i2c_client(dev);
e27c7292 MH	122	struct adxl34x *ac = i2c_get_clientdata(client);
e27c7292 MH	123
af6e1d99	124	adxl34x_resume(ac);
e27c7292 MH	125
	126	return 0;
	127	}
e27c7292 MH	128	#endif
e27c7292 MH	129
fbb89935 MB	130	static SIMPLE_DEV_PM_OPS(adxl34x_i2c_pm, adxl34x_i2c_suspend,
	131	adxl34x_i2c_resume);
	132
e27c7292 MH	133	static const struct i2c_device_id adxl34x_id[] = {
	134	{ "adxl34x", 0 },
	135	{ }
	136	};
	137
	138	MODULE_DEVICE_TABLE(i2c, adxl34x_id);
	139
	140	static struct i2c_driver adxl34x_driver = {
	141	.driver = {
	142	.name = "adxl34x",
	143	.owner = THIS_MODULE,
fbb89935	144	.pm = &adxl34x_i2c_pm,
e27c7292 MH	145	},
e27c7292 MH	146	.probe = adxl34x_i2c_probe,
1cb0aa88	147	.remove = adxl34x_i2c_remove,
e27c7292 MH	148	.id_table = adxl34x_id,
	149	};
	150
1b92c1cf	151	module_i2c_driver(adxl34x_driver);
e27c7292 MH	152
	153	MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
	154	MODULE_DESCRIPTION("ADXL345/346 Three-Axis Digital Accelerometer I2C Bus Driver");
	155	MODULE_LICENSE("GPL");