[linux-2.6-block.git] / drivers / hwmon / ad7418.c

/*
 * An hwmon driver for the Analog Devices AD7416/17/18
 * Copyright (C) 2006-07 Tower Technologies
 *
 * Author: Alessandro Zummo <a.zummo@towertech.it>
 *
 * Based on lm75.c
 * Copyright (C) 1998-99 Frodo Looijaard <frodol@dds.nl>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License,
 * as published by the Free Software Foundation - version 2.
 */

#include <linux/module.h>
#include <linux/jiffies.h>
#include <linux/i2c.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/of_device.h>
#include <linux/delay.h>
#include <linux/slab.h>

#include "lm75.h"

#define DRV_VERSION "0.4"

enum chips { ad7416, ad7417, ad7418 };

/* AD7418 registers */
#define AD7418_REG_TEMP_IN	0x00
#define AD7418_REG_CONF		0x01
#define AD7418_REG_TEMP_HYST	0x02
#define AD7418_REG_TEMP_OS	0x03
#define AD7418_REG_ADC		0x04
#define AD7418_REG_CONF2	0x05

#define AD7418_REG_ADC_CH(x)	((x) << 5)
#define AD7418_CH_TEMP		AD7418_REG_ADC_CH(0)

static const u8 AD7418_REG_TEMP[] = { AD7418_REG_TEMP_IN,
					AD7418_REG_TEMP_HYST,
					AD7418_REG_TEMP_OS };

struct ad7418_data {
	struct i2c_client	*client;
	enum chips		type;
	struct mutex		lock;
	int			adc_max;	/* number of ADC channels */
	char			valid;
	unsigned long		last_updated;	/* In jiffies */
	s16			temp[3];	/* Register values */
	u16			in[4];
};

static int ad7418_update_device(struct device *dev)
{
	struct ad7418_data *data = dev_get_drvdata(dev);
	struct i2c_client *client = data->client;
	s32 val;

	mutex_lock(&data->lock);

	if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
		|| !data->valid) {
		u8 cfg;
		int i, ch;

		/* read config register and clear channel bits */
		val = i2c_smbus_read_byte_data(client, AD7418_REG_CONF);
		if (val < 0)
			goto abort;

		cfg = val;
		cfg &= 0x1F;

		val = i2c_smbus_write_byte_data(client, AD7418_REG_CONF,
						cfg | AD7418_CH_TEMP);
		if (val < 0)
			goto abort;

		udelay(30);

		for (i = 0; i < 3; i++) {
			val = i2c_smbus_read_word_swapped(client,
							  AD7418_REG_TEMP[i]);
			if (val < 0)
				goto abort;

			data->temp[i] = val;
		}

		for (i = 0, ch = 4; i < data->adc_max; i++, ch--) {
			val = i2c_smbus_write_byte_data(client, AD7418_REG_CONF,
					cfg | AD7418_REG_ADC_CH(ch));
			if (val < 0)
				goto abort;

			udelay(15);
			val = i2c_smbus_read_word_swapped(client,
							  AD7418_REG_ADC);
			if (val < 0)
				goto abort;

			data->in[data->adc_max - 1 - i] = val;
		}

		/* restore old configuration value */
		val = i2c_smbus_write_word_swapped(client, AD7418_REG_CONF,
						   cfg);
		if (val < 0)
			goto abort;

		data->last_updated = jiffies;
		data->valid = 1;
	}

	mutex_unlock(&data->lock);
	return 0;

abort:
	data->valid = 0;
	mutex_unlock(&data->lock);
	return val;
}

static ssize_t temp_show(struct device *dev, struct device_attribute *devattr,
			 char *buf)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	struct ad7418_data *data = dev_get_drvdata(dev);
	int ret;

	ret = ad7418_update_device(dev);
	if (ret < 0)
		return ret;

	return sprintf(buf, "%d\n",
		LM75_TEMP_FROM_REG(data->temp[attr->index]));
}

static ssize_t adc_show(struct device *dev, struct device_attribute *devattr,
			char *buf)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	struct ad7418_data *data = dev_get_drvdata(dev);
	int ret;

	ret = ad7418_update_device(dev);
	if (ret < 0)
		return ret;

	return sprintf(buf, "%d\n",
		((data->in[attr->index] >> 6) * 2500 + 512) / 1024);
}

static ssize_t temp_store(struct device *dev,
			  struct device_attribute *devattr, const char *buf,
			  size_t count)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	struct ad7418_data *data = dev_get_drvdata(dev);
	struct i2c_client *client = data->client;
	long temp;
	int ret = kstrtol(buf, 10, &temp);

	if (ret < 0)
		return ret;

	mutex_lock(&data->lock);
	data->temp[attr->index] = LM75_TEMP_TO_REG(temp);
	i2c_smbus_write_word_swapped(client,
				     AD7418_REG_TEMP[attr->index],
				     data->temp[attr->index]);
	mutex_unlock(&data->lock);
	return count;
}

static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0);
static SENSOR_DEVICE_ATTR_RW(temp1_max_hyst, temp, 1);
static SENSOR_DEVICE_ATTR_RW(temp1_max, temp, 2);

static SENSOR_DEVICE_ATTR_RO(in1_input, adc, 0);
static SENSOR_DEVICE_ATTR_RO(in2_input, adc, 1);
static SENSOR_DEVICE_ATTR_RO(in3_input, adc, 2);
static SENSOR_DEVICE_ATTR_RO(in4_input, adc, 3);

static struct attribute *ad7416_attrs[] = {
	&sensor_dev_attr_temp1_max.dev_attr.attr,
	&sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
	&sensor_dev_attr_temp1_input.dev_attr.attr,
	NULL
};
ATTRIBUTE_GROUPS(ad7416);

static struct attribute *ad7417_attrs[] = {
	&sensor_dev_attr_temp1_max.dev_attr.attr,
	&sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
	&sensor_dev_attr_temp1_input.dev_attr.attr,
	&sensor_dev_attr_in1_input.dev_attr.attr,
	&sensor_dev_attr_in2_input.dev_attr.attr,
	&sensor_dev_attr_in3_input.dev_attr.attr,
	&sensor_dev_attr_in4_input.dev_attr.attr,
	NULL
};
ATTRIBUTE_GROUPS(ad7417);

static struct attribute *ad7418_attrs[] = {
	&sensor_dev_attr_temp1_max.dev_attr.attr,
	&sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
	&sensor_dev_attr_temp1_input.dev_attr.attr,
	&sensor_dev_attr_in1_input.dev_attr.attr,
	NULL
};
ATTRIBUTE_GROUPS(ad7418);

static void ad7418_init_client(struct i2c_client *client)
{
	struct ad7418_data *data = i2c_get_clientdata(client);

	int reg = i2c_smbus_read_byte_data(client, AD7418_REG_CONF);
	if (reg < 0) {
		dev_err(&client->dev, "cannot read configuration register\n");
	} else {
		dev_info(&client->dev, "configuring for mode 1\n");
		i2c_smbus_write_byte_data(client, AD7418_REG_CONF, reg & 0xfe);

		if (data->type == ad7417 || data->type == ad7418)
			i2c_smbus_write_byte_data(client,
						AD7418_REG_CONF2, 0x00);
	}
}

static int ad7418_probe(struct i2c_client *client,
			 const struct i2c_device_id *id)
{
	struct device *dev = &client->dev;
	struct i2c_adapter *adapter = client->adapter;
	struct ad7418_data *data;
	struct device *hwmon_dev;
	const struct attribute_group **attr_groups = NULL;

	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
					I2C_FUNC_SMBUS_WORD_DATA))
		return -EOPNOTSUPP;

	data = devm_kzalloc(dev, sizeof(struct ad7418_data), GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	i2c_set_clientdata(client, data);

	mutex_init(&data->lock);
	data->client = client;
	if (dev->of_node)
		data->type = (enum chips)of_device_get_match_data(dev);
	else
		data->type = id->driver_data;

	switch (data->type) {
	case ad7416:
		data->adc_max = 0;
		attr_groups = ad7416_groups;
		break;

	case ad7417:
		data->adc_max = 4;
		attr_groups = ad7417_groups;
		break;

	case ad7418:
		data->adc_max = 1;
		attr_groups = ad7418_groups;
		break;
	}

	dev_info(dev, "%s chip found\n", client->name);

	/* Initialize the AD7418 chip */
	ad7418_init_client(client);

	hwmon_dev = devm_hwmon_device_register_with_groups(dev,
							   client->name,
							   data, attr_groups);
	return PTR_ERR_OR_ZERO(hwmon_dev);
}

static const struct i2c_device_id ad7418_id[] = {
	{ "ad7416", ad7416 },
	{ "ad7417", ad7417 },
	{ "ad7418", ad7418 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, ad7418_id);

static const struct of_device_id ad7418_dt_ids[] = {
	{ .compatible = "adi,ad7416", .data = (void *)ad7416, },
	{ .compatible = "adi,ad7417", .data = (void *)ad7417, },
	{ .compatible = "adi,ad7418", .data = (void *)ad7418, },
	{ }
};
MODULE_DEVICE_TABLE(of, ad7418_dt_ids);

static struct i2c_driver ad7418_driver = {
	.driver = {
		.name	= "ad7418",
		.of_match_table = ad7418_dt_ids,
	},
	.probe		= ad7418_probe,
	.id_table	= ad7418_id,
};

module_i2c_driver(ad7418_driver);

MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");
MODULE_DESCRIPTION("AD7416/17/18 driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_VERSION);
Commit	Line	Data
2d8dd65f AZ	1	/*
	2	* An hwmon driver for the Analog Devices AD7416/17/18
	3	* Copyright (C) 2006-07 Tower Technologies
	4	*
	5	* Author: Alessandro Zummo <a.zummo@towertech.it>
	6	*
	7	* Based on lm75.c
	8	* Copyright (C) 1998-99 Frodo Looijaard <frodol@dds.nl>
	9	*
	10	* This program is free software; you can redistribute it and/or modify
	11	* it under the terms of the GNU General Public License,
	12	* as published by the Free Software Foundation - version 2.
	13	*/
	14
	15	#include <linux/module.h>
	16	#include <linux/jiffies.h>
	17	#include <linux/i2c.h>
	18	#include <linux/hwmon.h>
	19	#include <linux/hwmon-sysfs.h>
	20	#include <linux/err.h>
	21	#include <linux/mutex.h>
f4c2965e	22	#include <linux/of_device.h>
2d8dd65f	23	#include <linux/delay.h>
5a0e3ad6	24	#include <linux/slab.h>
2d8dd65f AZ	25
	26	#include "lm75.h"
	27
369932f6	28	#define DRV_VERSION "0.4"
2d8dd65f	29
369932f6	30	enum chips { ad7416, ad7417, ad7418 };
2d8dd65f AZ	31
	32	/* AD7418 registers */
	33	#define AD7418_REG_TEMP_IN 0x00
	34	#define AD7418_REG_CONF 0x01
	35	#define AD7418_REG_TEMP_HYST 0x02
	36	#define AD7418_REG_TEMP_OS 0x03
	37	#define AD7418_REG_ADC 0x04
	38	#define AD7418_REG_CONF2 0x05
	39
	40	#define AD7418_REG_ADC_CH(x) ((x) << 5)
	41	#define AD7418_CH_TEMP AD7418_REG_ADC_CH(0)
	42
	43	static const u8 AD7418_REG_TEMP[] = { AD7418_REG_TEMP_IN,
	44	AD7418_REG_TEMP_HYST,
	45	AD7418_REG_TEMP_OS };
	46
	47	struct ad7418_data {
337076f9	48	struct i2c_client *client;
2d8dd65f AZ	49	enum chips type;
	50	struct mutex lock;
	51	int adc_max; /* number of ADC channels */
	52	char valid;
	53	unsigned long last_updated; /* In jiffies */
	54	s16 temp[3]; /* Register values */
	55	u16 in[4];
	56	};
	57
45034e48	58	static int ad7418_update_device(struct device *dev)
2d8dd65f	59	{
337076f9 AL	60	struct ad7418_data *data = dev_get_drvdata(dev);
337076f9 AL	61	struct i2c_client *client = data->client;
45034e48	62	s32 val;
2d8dd65f AZ	63
	64	mutex_lock(&data->lock);
	65
	66	if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
	67	\|\| !data->valid) {
	68	u8 cfg;
	69	int i, ch;
	70
	71	/* read config register and clear channel bits */
45034e48 BM	72	val = i2c_smbus_read_byte_data(client, AD7418_REG_CONF);
	73	if (val < 0)
	74	goto abort;
	75
	76	cfg = val;
2d8dd65f AZ	77	cfg &= 0x1F;
2d8dd65f AZ	78
45034e48	79	val = i2c_smbus_write_byte_data(client, AD7418_REG_CONF,
2d8dd65f	80	cfg \| AD7418_CH_TEMP);
45034e48 BM	81	if (val < 0)
	82	goto abort;
	83
2d8dd65f AZ	84	udelay(30);
	85
	86	for (i = 0; i < 3; i++) {
45034e48 BM	87	val = i2c_smbus_read_word_swapped(client,
	88	AD7418_REG_TEMP[i]);
	89	if (val < 0)
	90	goto abort;
	91
	92	data->temp[i] = val;
2d8dd65f AZ	93	}
	94
	95	for (i = 0, ch = 4; i < data->adc_max; i++, ch--) {
45034e48	96	val = i2c_smbus_write_byte_data(client, AD7418_REG_CONF,
2d8dd65f	97	cfg \| AD7418_REG_ADC_CH(ch));
45034e48 BM	98	if (val < 0)
45034e48 BM	99	goto abort;
2d8dd65f AZ	100
2d8dd65f AZ	101	udelay(15);
45034e48 BM	102	val = i2c_smbus_read_word_swapped(client,
	103	AD7418_REG_ADC);
	104	if (val < 0)
	105	goto abort;
	106
	107	data->in[data->adc_max - 1 - i] = val;
2d8dd65f AZ	108	}
	109
	110	/* restore old configuration value */
45034e48 BM	111	val = i2c_smbus_write_word_swapped(client, AD7418_REG_CONF,
	112	cfg);
	113	if (val < 0)
	114	goto abort;
2d8dd65f AZ	115
	116	data->last_updated = jiffies;
	117	data->valid = 1;
	118	}
	119
	120	mutex_unlock(&data->lock);
45034e48	121	return 0;
2d8dd65f	122
45034e48 BM	123	abort:
	124	data->valid = 0;
	125	mutex_unlock(&data->lock);
	126	return val;
2d8dd65f AZ	127	}
2d8dd65f AZ	128
6fdc5d7f GR	129	static ssize_t temp_show(struct device dev, struct device_attribute devattr,
6fdc5d7f GR	130	char *buf)
2d8dd65f AZ	131	{
2d8dd65f AZ	132	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
45034e48 BM	133	struct ad7418_data *data = dev_get_drvdata(dev);
	134	int ret;
	135
	136	ret = ad7418_update_device(dev);
	137	if (ret < 0)
	138	return ret;
	139
2d8dd65f AZ	140	return sprintf(buf, "%d\n",
	141	LM75_TEMP_FROM_REG(data->temp[attr->index]));
	142	}
	143
6fdc5d7f	144	static ssize_t adc_show(struct device dev, struct device_attribute devattr,
2d8dd65f AZ	145	char *buf)
	146	{
	147	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
45034e48 BM	148	struct ad7418_data *data = dev_get_drvdata(dev);
	149	int ret;
	150
	151	ret = ad7418_update_device(dev);
	152	if (ret < 0)
	153	return ret;
2d8dd65f AZ	154
	155	return sprintf(buf, "%d\n",
	156	((data->in[attr->index] >> 6) * 2500 + 512) / 1024);
	157	}
	158
6fdc5d7f GR	159	static ssize_t temp_store(struct device *dev,
	160	struct device_attribute devattr, const char buf,
	161	size_t count)
2d8dd65f AZ	162	{
2d8dd65f AZ	163	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
337076f9 AL	164	struct ad7418_data *data = dev_get_drvdata(dev);
337076f9 AL	165	struct i2c_client *client = data->client;
e91aef22 FM	166	long temp;
	167	int ret = kstrtol(buf, 10, &temp);
	168
	169	if (ret < 0)
	170	return ret;
2d8dd65f AZ	171
	172	mutex_lock(&data->lock);
	173	data->temp[attr->index] = LM75_TEMP_TO_REG(temp);
90f4102c JD	174	i2c_smbus_write_word_swapped(client,
	175	AD7418_REG_TEMP[attr->index],
	176	data->temp[attr->index]);
2d8dd65f AZ	177	mutex_unlock(&data->lock);
	178	return count;
	179	}
	180
6fdc5d7f GR	181	static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0);
	182	static SENSOR_DEVICE_ATTR_RW(temp1_max_hyst, temp, 1);
	183	static SENSOR_DEVICE_ATTR_RW(temp1_max, temp, 2);
2d8dd65f	184
6fdc5d7f GR	185	static SENSOR_DEVICE_ATTR_RO(in1_input, adc, 0);
	186	static SENSOR_DEVICE_ATTR_RO(in2_input, adc, 1);
	187	static SENSOR_DEVICE_ATTR_RO(in3_input, adc, 2);
	188	static SENSOR_DEVICE_ATTR_RO(in4_input, adc, 3);
2d8dd65f	189
337076f9	190	static struct attribute *ad7416_attrs[] = {
2d8dd65f AZ	191	&sensor_dev_attr_temp1_max.dev_attr.attr,
	192	&sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
	193	&sensor_dev_attr_temp1_input.dev_attr.attr,
	194	NULL
	195	};
337076f9	196	ATTRIBUTE_GROUPS(ad7416);
2d8dd65f	197
337076f9	198	static struct attribute *ad7417_attrs[] = {
2d8dd65f AZ	199	&sensor_dev_attr_temp1_max.dev_attr.attr,
	200	&sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
	201	&sensor_dev_attr_temp1_input.dev_attr.attr,
	202	&sensor_dev_attr_in1_input.dev_attr.attr,
	203	&sensor_dev_attr_in2_input.dev_attr.attr,
	204	&sensor_dev_attr_in3_input.dev_attr.attr,
	205	&sensor_dev_attr_in4_input.dev_attr.attr,
	206	NULL
	207	};
337076f9	208	ATTRIBUTE_GROUPS(ad7417);
2d8dd65f	209
337076f9	210	static struct attribute *ad7418_attrs[] = {
2d8dd65f AZ	211	&sensor_dev_attr_temp1_max.dev_attr.attr,
	212	&sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
	213	&sensor_dev_attr_temp1_input.dev_attr.attr,
	214	&sensor_dev_attr_in1_input.dev_attr.attr,
	215	NULL
	216	};
337076f9	217	ATTRIBUTE_GROUPS(ad7418);
2d8dd65f	218
991763a9 AL	219	static void ad7418_init_client(struct i2c_client *client)
	220	{
	221	struct ad7418_data *data = i2c_get_clientdata(client);
	222
	223	int reg = i2c_smbus_read_byte_data(client, AD7418_REG_CONF);
	224	if (reg < 0) {
	225	dev_err(&client->dev, "cannot read configuration register\n");
	226	} else {
	227	dev_info(&client->dev, "configuring for mode 1\n");
	228	i2c_smbus_write_byte_data(client, AD7418_REG_CONF, reg & 0xfe);
	229
	230	if (data->type == ad7417 \|\| data->type == ad7418)
	231	i2c_smbus_write_byte_data(client,
	232	AD7418_REG_CONF2, 0x00);
	233	}
	234	}
	235
369932f6 JD	236	static int ad7418_probe(struct i2c_client *client,
369932f6 JD	237	const struct i2c_device_id *id)
2d8dd65f	238	{
337076f9	239	struct device *dev = &client->dev;
369932f6	240	struct i2c_adapter *adapter = client->adapter;
2d8dd65f	241	struct ad7418_data *data;
337076f9 AL	242	struct device *hwmon_dev;
337076f9 AL	243	const struct attribute_group **attr_groups = NULL;
2d8dd65f AZ	244
2d8dd65f AZ	245	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA \|
d5282926 GR	246	I2C_FUNC_SMBUS_WORD_DATA))
d5282926 GR	247	return -EOPNOTSUPP;
2d8dd65f	248
337076f9	249	data = devm_kzalloc(dev, sizeof(struct ad7418_data), GFP_KERNEL);
d5282926 GR	250	if (!data)
d5282926 GR	251	return -ENOMEM;
2d8dd65f	252
2d8dd65f AZ	253	i2c_set_clientdata(client, data);
	254
	255	mutex_init(&data->lock);
337076f9	256	data->client = client;
f4c2965e LW	257	if (dev->of_node)
	258	data->type = (enum chips)of_device_get_match_data(dev);
	259	else
	260	data->type = id->driver_data;
2d8dd65f AZ	261
2d8dd65f AZ	262	switch (data->type) {
2d8dd65f AZ	263	case ad7416:
2d8dd65f AZ	264	data->adc_max = 0;
337076f9	265	attr_groups = ad7416_groups;
2d8dd65f AZ	266	break;
	267
	268	case ad7417:
	269	data->adc_max = 4;
337076f9	270	attr_groups = ad7417_groups;
2d8dd65f AZ	271	break;
	272
	273	case ad7418:
	274	data->adc_max = 1;
337076f9	275	attr_groups = ad7418_groups;
2d8dd65f AZ	276	break;
	277	}
	278
337076f9	279	dev_info(dev, "%s chip found\n", client->name);
2d8dd65f AZ	280
	281	/* Initialize the AD7418 chip */
	282	ad7418_init_client(client);
	283
337076f9 AL	284	hwmon_dev = devm_hwmon_device_register_with_groups(dev,
	285	client->name,
	286	data, attr_groups);
	287	return PTR_ERR_OR_ZERO(hwmon_dev);
2d8dd65f AZ	288	}
2d8dd65f AZ	289
991763a9 AL	290	static const struct i2c_device_id ad7418_id[] = {
	291	{ "ad7416", ad7416 },
	292	{ "ad7417", ad7417 },
	293	{ "ad7418", ad7418 },
	294	{ }
	295	};
	296	MODULE_DEVICE_TABLE(i2c, ad7418_id);
	297
f4c2965e LW	298	static const struct of_device_id ad7418_dt_ids[] = {
	299	{ .compatible = "adi,ad7416", .data = (void *)ad7416, },
	300	{ .compatible = "adi,ad7417", .data = (void *)ad7417, },
	301	{ .compatible = "adi,ad7418", .data = (void *)ad7418, },
	302	{ }
	303	};
	304	MODULE_DEVICE_TABLE(of, ad7418_dt_ids);
	305
991763a9 AL	306	static struct i2c_driver ad7418_driver = {
	307	.driver = {
	308	.name = "ad7418",
f4c2965e	309	.of_match_table = ad7418_dt_ids,
991763a9 AL	310	},
991763a9 AL	311	.probe = ad7418_probe,
991763a9 AL	312	.id_table = ad7418_id,
	313	};
	314
f0967eea	315	module_i2c_driver(ad7418_driver);
2d8dd65f AZ	316
	317	MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");
	318	MODULE_DESCRIPTION("AD7416/17/18 driver");
	319	MODULE_LICENSE("GPL");
	320	MODULE_VERSION(DRV_VERSION);