[linux-2.6-block.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/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, &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);
}

static int __maybe_unused 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 __maybe_unused 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;
}

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);

#ifdef CONFIG_OF
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);
#endif

static struct i2c_driver adxl34x_driver = {
	.driver = {
		.name = "adxl34x",
		.pm = &adxl34x_i2c_pm,
		.of_match_table = of_match_ptr(adxl34x_of_id),
	},
	.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>
3a38958d	13	#include <linux/of.h>
e27c7292	14	#include <linux/types.h>
fbb89935	15	#include <linux/pm.h>
e27c7292 MH	16	#include "adxl34x.h"
	17
	18	static int adxl34x_smbus_read(struct device *dev, unsigned char reg)
	19	{
	20	struct i2c_client *client = to_i2c_client(dev);
	21
	22	return i2c_smbus_read_byte_data(client, reg);
	23	}
	24
	25	static int adxl34x_smbus_write(struct device *dev,
	26	unsigned char reg, unsigned char val)
	27	{
	28	struct i2c_client *client = to_i2c_client(dev);
	29
	30	return i2c_smbus_write_byte_data(client, reg, val);
	31	}
	32
	33	static int adxl34x_smbus_read_block(struct device *dev,
	34	unsigned char reg, int count,
	35	void *buf)
	36	{
	37	struct i2c_client *client = to_i2c_client(dev);
	38
	39	return i2c_smbus_read_i2c_block_data(client, reg, count, buf);
	40	}
	41
	42	static int adxl34x_i2c_read_block(struct device *dev,
	43	unsigned char reg, int count,
	44	void *buf)
	45	{
	46	struct i2c_client *client = to_i2c_client(dev);
	47	int ret;
	48
	49	ret = i2c_master_send(client, &reg, 1);
	50	if (ret < 0)
	51	return ret;
	52
	53	ret = i2c_master_recv(client, buf, count);
	54	if (ret < 0)
	55	return ret;
	56
	57	if (ret != count)
	58	return -EIO;
	59
	60	return 0;
	61	}
	62
af6e1d99	63	static const struct adxl34x_bus_ops adxl34x_smbus_bops = {
e27c7292 MH	64	.bustype = BUS_I2C,
	65	.write = adxl34x_smbus_write,
	66	.read = adxl34x_smbus_read,
	67	.read_block = adxl34x_smbus_read_block,
	68	};
	69
af6e1d99	70	static const struct adxl34x_bus_ops adxl34x_i2c_bops = {
e27c7292 MH	71	.bustype = BUS_I2C,
	72	.write = adxl34x_smbus_write,
	73	.read = adxl34x_smbus_read,
	74	.read_block = adxl34x_i2c_read_block,
	75	};
	76
5298cc4c	77	static int adxl34x_i2c_probe(struct i2c_client *client,
e27c7292 MH	78	const struct i2c_device_id *id)
	79	{
	80	struct adxl34x *ac;
	81	int error;
	82
	83	error = i2c_check_functionality(client->adapter,
	84	I2C_FUNC_SMBUS_BYTE_DATA);
	85	if (!error) {
	86	dev_err(&client->dev, "SMBUS Byte Data not Supported\n");
	87	return -EIO;
	88	}
	89
	90	ac = adxl34x_probe(&client->dev, client->irq, false,
	91	i2c_check_functionality(client->adapter,
	92	I2C_FUNC_SMBUS_READ_I2C_BLOCK) ?
af6e1d99	93	&adxl34x_smbus_bops : &adxl34x_i2c_bops);
e27c7292 MH	94	if (IS_ERR(ac))
	95	return PTR_ERR(ac);
	96
	97	i2c_set_clientdata(client, ac);
	98
	99	return 0;
	100	}
	101
e2619cf7	102	static int adxl34x_i2c_remove(struct i2c_client *client)
e27c7292 MH	103	{
	104	struct adxl34x *ac = i2c_get_clientdata(client);
	105
	106	return adxl34x_remove(ac);
	107	}
	108
97a652a8	109	static int __maybe_unused 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
97a652a8	119	static int __maybe_unused 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	128
fbb89935 MB	129	static SIMPLE_DEV_PM_OPS(adxl34x_i2c_pm, adxl34x_i2c_suspend,
	130	adxl34x_i2c_resume);
	131
e27c7292 MH	132	static const struct i2c_device_id adxl34x_id[] = {
	133	{ "adxl34x", 0 },
	134	{ }
	135	};
	136
	137	MODULE_DEVICE_TABLE(i2c, adxl34x_id);
	138
3a38958d LP	139	#ifdef CONFIG_OF
	140	static const struct of_device_id adxl34x_of_id[] = {
	141	/*
	142	* The ADXL346 is backward-compatible with the ADXL345. Differences are
	143	* handled by runtime detection of the device model, there's thus no
	144	* need for listing the "adi,adxl346" compatible value explicitly.
	145	*/
	146	{ .compatible = "adi,adxl345", },
	147	/*
	148	* Deprecated, DT nodes should use one or more of the device-specific
	149	* compatible values "adi,adxl345" and "adi,adxl346".
	150	*/
	151	{ .compatible = "adi,adxl34x", },
	152	{ }
	153	};
	154
	155	MODULE_DEVICE_TABLE(of, adxl34x_of_id);
	156	#endif
	157
e27c7292 MH	158	static struct i2c_driver adxl34x_driver = {
	159	.driver = {
	160	.name = "adxl34x",
fbb89935	161	.pm = &adxl34x_i2c_pm,
3a38958d	162	.of_match_table = of_match_ptr(adxl34x_of_id),
e27c7292 MH	163	},
e27c7292 MH	164	.probe = adxl34x_i2c_probe,
1cb0aa88	165	.remove = adxl34x_i2c_remove,
e27c7292 MH	166	.id_table = adxl34x_id,
	167	};
	168
1b92c1cf	169	module_i2c_driver(adxl34x_driver);
e27c7292 MH	170
	171	MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
	172	MODULE_DESCRIPTION("ADXL345/346 Three-Axis Digital Accelerometer I2C Bus Driver");
	173	MODULE_LICENSE("GPL");