[deliverable/linux.git] / drivers / hwmon / ds1621.c

/*
 * ds1621.c - Part of lm_sensors, Linux kernel modules for hardware
 *	      monitoring
 * Christian W. Zuckschwerdt  <zany@triq.net>  2000-11-23
 * based on lm75.c by Frodo Looijaard <frodol@dds.nl>
 * Ported to Linux 2.6 by Aurelien Jarno <aurelien@aurel32.net> with
 * the help of Jean Delvare <khali@linux-fr.org>
 *
 * 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; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.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/sysfs.h>
#include "lm75.h"

/* Addresses to scan */
static const unsigned short normal_i2c[] = { 0x48, 0x49, 0x4a, 0x4b, 0x4c,
					0x4d, 0x4e, 0x4f, I2C_CLIENT_END };

/* Insmod parameters */
static int polarity = -1;
module_param(polarity, int, 0);
MODULE_PARM_DESC(polarity, "Output's polarity: 0 = active high, 1 = active low");

/* Many DS1621 constants specified below */
/* Config register used for detection         */
/*  7    6    5    4    3    2    1    0      */
/* |Done|THF |TLF |NVB | X  | X  |POL |1SHOT| */
#define DS1621_REG_CONFIG_NVB		0x10
#define DS1621_REG_CONFIG_POLARITY	0x02
#define DS1621_REG_CONFIG_1SHOT		0x01
#define DS1621_REG_CONFIG_DONE		0x80

/* The DS1621 registers */
static const u8 DS1621_REG_TEMP[3] = {
	0xAA,		/* input, word, RO */
	0xA2,		/* min, word, RW */
	0xA1,		/* max, word, RW */
};
#define DS1621_REG_CONF			0xAC /* byte, RW */
#define DS1621_COM_START		0xEE /* no data */
#define DS1621_COM_STOP			0x22 /* no data */

/* The DS1621 configuration register */
#define DS1621_ALARM_TEMP_HIGH		0x40
#define DS1621_ALARM_TEMP_LOW		0x20

/* Conversions */
#define ALARMS_FROM_REG(val) ((val) & \
			(DS1621_ALARM_TEMP_HIGH | DS1621_ALARM_TEMP_LOW))

/* Each client has this additional data */
struct ds1621_data {
	struct device *hwmon_dev;
	struct mutex update_lock;
	char valid;			/* !=0 if following fields are valid */
	unsigned long last_updated;	/* In jiffies */

	u16 temp[3];			/* Register values, word */
	u8 conf;			/* Register encoding, combined */
};

static void ds1621_init_client(struct i2c_client *client)
{
	u8 conf, new_conf;

	new_conf = conf = i2c_smbus_read_byte_data(client, DS1621_REG_CONF);
	/* switch to continuous conversion mode */
	new_conf &= ~DS1621_REG_CONFIG_1SHOT;

	/* setup output polarity */
	if (polarity == 0)
		new_conf &= ~DS1621_REG_CONFIG_POLARITY;
	else if (polarity == 1)
		new_conf |= DS1621_REG_CONFIG_POLARITY;

	if (conf != new_conf)
		i2c_smbus_write_byte_data(client, DS1621_REG_CONF, new_conf);

	/* start conversion */
	i2c_smbus_write_byte(client, DS1621_COM_START);
}

static struct ds1621_data *ds1621_update_client(struct device *dev)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct ds1621_data *data = i2c_get_clientdata(client);
	u8 new_conf;

	mutex_lock(&data->update_lock);

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

		dev_dbg(&client->dev, "Starting ds1621 update\n");

		data->conf = i2c_smbus_read_byte_data(client, DS1621_REG_CONF);

		for (i = 0; i < ARRAY_SIZE(data->temp); i++)
			data->temp[i] = i2c_smbus_read_word_swapped(client,
							 DS1621_REG_TEMP[i]);

		/* reset alarms if necessary */
		new_conf = data->conf;
		if (data->temp[0] > data->temp[1])	/* input > min */
			new_conf &= ~DS1621_ALARM_TEMP_LOW;
		if (data->temp[0] < data->temp[2])	/* input < max */
			new_conf &= ~DS1621_ALARM_TEMP_HIGH;
		if (data->conf != new_conf)
			i2c_smbus_write_byte_data(client, DS1621_REG_CONF,
						  new_conf);

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

	mutex_unlock(&data->update_lock);

	return data;
}

static ssize_t show_temp(struct device *dev, struct device_attribute *da,
			 char *buf)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
	struct ds1621_data *data = ds1621_update_client(dev);
	return sprintf(buf, "%d\n",
		       LM75_TEMP_FROM_REG(data->temp[attr->index]));
}

static ssize_t set_temp(struct device *dev, struct device_attribute *da,
			const char *buf, size_t count)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
	struct i2c_client *client = to_i2c_client(dev);
	struct ds1621_data *data = i2c_get_clientdata(client);
	long val;
	int err;

	err = kstrtol(buf, 10, &val);
	if (err)
		return err;

	mutex_lock(&data->update_lock);
	data->temp[attr->index] = LM75_TEMP_TO_REG(val);
	i2c_smbus_write_word_swapped(client, DS1621_REG_TEMP[attr->index],
				     data->temp[attr->index]);
	mutex_unlock(&data->update_lock);
	return count;
}

static ssize_t show_alarms(struct device *dev, struct device_attribute *da,
			   char *buf)
{
	struct ds1621_data *data = ds1621_update_client(dev);
	return sprintf(buf, "%d\n", ALARMS_FROM_REG(data->conf));
}

static ssize_t show_alarm(struct device *dev, struct device_attribute *da,
			  char *buf)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
	struct ds1621_data *data = ds1621_update_client(dev);
	return sprintf(buf, "%d\n", !!(data->conf & attr->index));
}

static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp, set_temp, 1);
static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp, set_temp, 2);
static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_alarm, NULL,
		DS1621_ALARM_TEMP_LOW);
static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL,
		DS1621_ALARM_TEMP_HIGH);

static struct attribute *ds1621_attributes[] = {
	&sensor_dev_attr_temp1_input.dev_attr.attr,
	&sensor_dev_attr_temp1_min.dev_attr.attr,
	&sensor_dev_attr_temp1_max.dev_attr.attr,
	&sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
	&sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
	&dev_attr_alarms.attr,
	NULL
};

static const struct attribute_group ds1621_group = {
	.attrs = ds1621_attributes,
};


/* Return 0 if detection is successful, -ENODEV otherwise */
static int ds1621_detect(struct i2c_client *client,
			 struct i2c_board_info *info)
{
	struct i2c_adapter *adapter = client->adapter;
	int conf, temp;
	int i;

	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA
				     | I2C_FUNC_SMBUS_WORD_DATA
				     | I2C_FUNC_SMBUS_WRITE_BYTE))
		return -ENODEV;

	/*
	 * Now, we do the remaining detection. It is lousy.
	 *
	 * The NVB bit should be low if no EEPROM write has been requested
	 * during the latest 10ms, which is highly improbable in our case.
	 */
	conf = i2c_smbus_read_byte_data(client, DS1621_REG_CONF);
	if (conf < 0 || conf & DS1621_REG_CONFIG_NVB)
		return -ENODEV;
	/* The 7 lowest bits of a temperature should always be 0. */
	for (i = 0; i < ARRAY_SIZE(DS1621_REG_TEMP); i++) {
		temp = i2c_smbus_read_word_data(client, DS1621_REG_TEMP[i]);
		if (temp < 0 || (temp & 0x7f00))
			return -ENODEV;
	}

	strlcpy(info->type, "ds1621", I2C_NAME_SIZE);

	return 0;
}

static int ds1621_probe(struct i2c_client *client,
			const struct i2c_device_id *id)
{
	struct ds1621_data *data;
	int err;

	data = devm_kzalloc(&client->dev, sizeof(struct ds1621_data),
			    GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	i2c_set_clientdata(client, data);
	mutex_init(&data->update_lock);

	/* Initialize the DS1621 chip */
	ds1621_init_client(client);

	/* Register sysfs hooks */
	err = sysfs_create_group(&client->dev.kobj, &ds1621_group);
	if (err)
		return err;

	data->hwmon_dev = hwmon_device_register(&client->dev);
	if (IS_ERR(data->hwmon_dev)) {
		err = PTR_ERR(data->hwmon_dev);
		goto exit_remove_files;
	}

	return 0;

 exit_remove_files:
	sysfs_remove_group(&client->dev.kobj, &ds1621_group);
	return err;
}

static int ds1621_remove(struct i2c_client *client)
{
	struct ds1621_data *data = i2c_get_clientdata(client);

	hwmon_device_unregister(data->hwmon_dev);
	sysfs_remove_group(&client->dev.kobj, &ds1621_group);

	return 0;
}

static const struct i2c_device_id ds1621_id[] = {
	{ "ds1621", 0 },
	{ "ds1625", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, ds1621_id);

/* This is the driver that will be inserted */
static struct i2c_driver ds1621_driver = {
	.class		= I2C_CLASS_HWMON,
	.driver = {
		.name	= "ds1621",
	},
	.probe		= ds1621_probe,
	.remove		= ds1621_remove,
	.id_table	= ds1621_id,
	.detect		= ds1621_detect,
	.address_list	= normal_i2c,
};

module_i2c_driver(ds1621_driver);

MODULE_AUTHOR("Christian W. Zuckschwerdt <zany@triq.net>");
MODULE_DESCRIPTION("DS1621 driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
1da177e4	1	/*
19f2c059 GR	2	* ds1621.c - Part of lm_sensors, Linux kernel modules for hardware
	3	* monitoring
	4	* Christian W. Zuckschwerdt <zany@triq.net> 2000-11-23
	5	* based on lm75.c by Frodo Looijaard <frodol@dds.nl>
	6	* Ported to Linux 2.6 by Aurelien Jarno <aurelien@aurel32.net> with
	7	* the help of Jean Delvare <khali@linux-fr.org>
	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License as published by
	11	* the Free Software Foundation; either version 2 of the License, or
	12	* (at your option) any later version.
	13	*
	14	* This program is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	* GNU General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License
	20	* along with this program; if not, write to the Free Software
	21	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	22	*/
1da177e4 LT	23
	24	#include <linux/module.h>
	25	#include <linux/init.h>
	26	#include <linux/slab.h>
	27	#include <linux/jiffies.h>
	28	#include <linux/i2c.h>
943b0830	29	#include <linux/hwmon.h>
46a2e71c	30	#include <linux/hwmon-sysfs.h>
943b0830	31	#include <linux/err.h>
9a61bf63	32	#include <linux/mutex.h>
a5ebe668	33	#include <linux/sysfs.h>
1da177e4 LT	34	#include "lm75.h"
	35
	36	/* Addresses to scan */
25e9c86d	37	static const unsigned short normal_i2c[] = { 0x48, 0x49, 0x4a, 0x4b, 0x4c,
1da177e4	38	0x4d, 0x4e, 0x4f, I2C_CLIENT_END };
1da177e4 LT	39
1da177e4 LT	40	/* Insmod parameters */
1da177e4 LT	41	static int polarity = -1;
	42	module_param(polarity, int, 0);
	43	MODULE_PARM_DESC(polarity, "Output's polarity: 0 = active high, 1 = active low");
	44
	45	/* Many DS1621 constants specified below */
	46	/* Config register used for detection */
	47	/* 7 6 5 4 3 2 1 0 */
	48	/* \|Done\|THF \|TLF \|NVB \| X \| X \|POL \|1SHOT\| */
	49	#define DS1621_REG_CONFIG_NVB 0x10
	50	#define DS1621_REG_CONFIG_POLARITY 0x02
	51	#define DS1621_REG_CONFIG_1SHOT 0x01
	52	#define DS1621_REG_CONFIG_DONE 0x80
	53
	54	/* The DS1621 registers */
46a2e71c JD	55	static const u8 DS1621_REG_TEMP[3] = {
	56	0xAA, /* input, word, RO */
	57	0xA2, /* min, word, RW */
	58	0xA1, /* max, word, RW */
	59	};
1da177e4 LT	60	#define DS1621_REG_CONF 0xAC /* byte, RW */
	61	#define DS1621_COM_START 0xEE /* no data */
	62	#define DS1621_COM_STOP 0x22 /* no data */
	63
	64	/* The DS1621 configuration register */
	65	#define DS1621_ALARM_TEMP_HIGH 0x40
	66	#define DS1621_ALARM_TEMP_LOW 0x20
	67
75819f01	68	/* Conversions */
1da177e4	69	#define ALARMS_FROM_REG(val) ((val) & \
19f2c059	70	(DS1621_ALARM_TEMP_HIGH \| DS1621_ALARM_TEMP_LOW))
1da177e4 LT	71
	72	/* Each client has this additional data */
	73	struct ds1621_data {
1beeffe4	74	struct device *hwmon_dev;
9a61bf63	75	struct mutex update_lock;
1da177e4 LT	76	char valid; /* !=0 if following fields are valid */
	77	unsigned long last_updated; /* In jiffies */
	78
46a2e71c	79	u16 temp[3]; /* Register values, word */
1da177e4 LT	80	u8 conf; /* Register encoding, combined */
	81	};
	82
1da177e4 LT	83	static void ds1621_init_client(struct i2c_client *client)
1da177e4 LT	84	{
e4879e28 JD	85	u8 conf, new_conf;
	86
	87	new_conf = conf = i2c_smbus_read_byte_data(client, DS1621_REG_CONF);
44bbe87e	88	/* switch to continuous conversion mode */
e4879e28	89	new_conf &= ~DS1621_REG_CONFIG_1SHOT;
1da177e4 LT	90
	91	/* setup output polarity */
	92	if (polarity == 0)
e4879e28	93	new_conf &= ~DS1621_REG_CONFIG_POLARITY;
1da177e4	94	else if (polarity == 1)
e4879e28	95	new_conf \|= DS1621_REG_CONFIG_POLARITY;
19f2c059	96
e4879e28 JD	97	if (conf != new_conf)
e4879e28 JD	98	i2c_smbus_write_byte_data(client, DS1621_REG_CONF, new_conf);
19f2c059	99
1da177e4 LT	100	/* start conversion */
	101	i2c_smbus_write_byte(client, DS1621_COM_START);
	102	}
	103
9202add6 JD	104	static struct ds1621_data ds1621_update_client(struct device dev)
	105	{
	106	struct i2c_client *client = to_i2c_client(dev);
	107	struct ds1621_data *data = i2c_get_clientdata(client);
	108	u8 new_conf;
	109
	110	mutex_lock(&data->update_lock);
	111
	112	if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
	113	\|\| !data->valid) {
	114	int i;
	115
	116	dev_dbg(&client->dev, "Starting ds1621 update\n");
	117
594592dc	118	data->conf = i2c_smbus_read_byte_data(client, DS1621_REG_CONF);
9202add6 JD	119
9202add6 JD	120	for (i = 0; i < ARRAY_SIZE(data->temp); i++)
90f4102c	121	data->temp[i] = i2c_smbus_read_word_swapped(client,
594592dc	122	DS1621_REG_TEMP[i]);
9202add6 JD	123
	124	/* reset alarms if necessary */
	125	new_conf = data->conf;
	126	if (data->temp[0] > data->temp[1]) /* input > min */
	127	new_conf &= ~DS1621_ALARM_TEMP_LOW;
	128	if (data->temp[0] < data->temp[2]) /* input < max */
	129	new_conf &= ~DS1621_ALARM_TEMP_HIGH;
	130	if (data->conf != new_conf)
594592dc JD	131	i2c_smbus_write_byte_data(client, DS1621_REG_CONF,
594592dc JD	132	new_conf);
9202add6 JD	133
	134	data->last_updated = jiffies;
	135	data->valid = 1;
	136	}
	137
	138	mutex_unlock(&data->update_lock);
	139
	140	return data;
	141	}
	142
46a2e71c JD	143	static ssize_t show_temp(struct device dev, struct device_attribute da,
	144	char *buf)
	145	{
	146	struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
	147	struct ds1621_data *data = ds1621_update_client(dev);
	148	return sprintf(buf, "%d\n",
	149	LM75_TEMP_FROM_REG(data->temp[attr->index]));
1da177e4 LT	150	}
1da177e4 LT	151
46a2e71c JD	152	static ssize_t set_temp(struct device dev, struct device_attribute da,
	153	const char *buf, size_t count)
	154	{
	155	struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
	156	struct i2c_client *client = to_i2c_client(dev);
e4879e28	157	struct ds1621_data *data = i2c_get_clientdata(client);
19f2c059 GR	158	long val;
	159	int err;
	160
	161	err = kstrtol(buf, 10, &val);
	162	if (err)
	163	return err;
1da177e4	164
46a2e71c	165	mutex_lock(&data->update_lock);
19f2c059	166	data->temp[attr->index] = LM75_TEMP_TO_REG(val);
90f4102c JD	167	i2c_smbus_write_word_swapped(client, DS1621_REG_TEMP[attr->index],
90f4102c JD	168	data->temp[attr->index]);
46a2e71c JD	169	mutex_unlock(&data->update_lock);
	170	return count;
	171	}
1da177e4	172
46a2e71c JD	173	static ssize_t show_alarms(struct device dev, struct device_attribute da,
46a2e71c JD	174	char *buf)
1da177e4 LT	175	{
	176	struct ds1621_data *data = ds1621_update_client(dev);
	177	return sprintf(buf, "%d\n", ALARMS_FROM_REG(data->conf));
	178	}
	179
87f0f31b JD	180	static ssize_t show_alarm(struct device dev, struct device_attribute da,
	181	char *buf)
	182	{
	183	struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
	184	struct ds1621_data *data = ds1621_update_client(dev);
	185	return sprintf(buf, "%d\n", !!(data->conf & attr->index));
	186	}
	187
1da177e4	188	static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
46a2e71c JD	189	static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
	190	static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR \| S_IRUGO, show_temp, set_temp, 1);
	191	static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR \| S_IRUGO, show_temp, set_temp, 2);
87f0f31b JD	192	static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_alarm, NULL,
	193	DS1621_ALARM_TEMP_LOW);
	194	static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL,
	195	DS1621_ALARM_TEMP_HIGH);
1da177e4	196
a5ebe668	197	static struct attribute *ds1621_attributes[] = {
46a2e71c JD	198	&sensor_dev_attr_temp1_input.dev_attr.attr,
	199	&sensor_dev_attr_temp1_min.dev_attr.attr,
	200	&sensor_dev_attr_temp1_max.dev_attr.attr,
87f0f31b JD	201	&sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
87f0f31b JD	202	&sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
a5ebe668 JD	203	&dev_attr_alarms.attr,
	204	NULL
	205	};
	206
	207	static const struct attribute_group ds1621_group = {
	208	.attrs = ds1621_attributes,
	209	};
	210
1da177e4	211
70313eab	212	/* Return 0 if detection is successful, -ENODEV otherwise */
310ec792	213	static int ds1621_detect(struct i2c_client *client,
70313eab	214	struct i2c_board_info *info)
1da177e4	215	{
70313eab	216	struct i2c_adapter *adapter = client->adapter;
1da177e4	217	int conf, temp;
70313eab	218	int i;
1da177e4	219
19f2c059 GR	220	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA
19f2c059 GR	221	\| I2C_FUNC_SMBUS_WORD_DATA
1da177e4	222	\| I2C_FUNC_SMBUS_WRITE_BYTE))
70313eab	223	return -ENODEV;
1da177e4	224
19f2c059 GR	225	/*
	226	* Now, we do the remaining detection. It is lousy.
	227	*
	228	* The NVB bit should be low if no EEPROM write has been requested
	229	* during the latest 10ms, which is highly improbable in our case.
	230	*/
52df6440 JD	231	conf = i2c_smbus_read_byte_data(client, DS1621_REG_CONF);
	232	if (conf < 0 \|\| conf & DS1621_REG_CONFIG_NVB)
	233	return -ENODEV;
	234	/* The 7 lowest bits of a temperature should always be 0. */
	235	for (i = 0; i < ARRAY_SIZE(DS1621_REG_TEMP); i++) {
	236	temp = i2c_smbus_read_word_data(client, DS1621_REG_TEMP[i]);
	237	if (temp < 0 \|\| (temp & 0x7f00))
70313eab	238	return -ENODEV;
1da177e4 LT	239	}
1da177e4 LT	240
70313eab	241	strlcpy(info->type, "ds1621", I2C_NAME_SIZE);
1da177e4	242
70313eab JD	243	return 0;
	244	}
	245
	246	static int ds1621_probe(struct i2c_client *client,
	247	const struct i2c_device_id *id)
	248	{
	249	struct ds1621_data *data;
	250	int err;
	251
e20b4b38 GR	252	data = devm_kzalloc(&client->dev, sizeof(struct ds1621_data),
	253	GFP_KERNEL);
	254	if (!data)
	255	return -ENOMEM;
70313eab JD	256
	257	i2c_set_clientdata(client, data);
	258	mutex_init(&data->update_lock);
1da177e4 LT	259
1da177e4 LT	260	/* Initialize the DS1621 chip */
75819f01	261	ds1621_init_client(client);
1da177e4 LT	262
1da177e4 LT	263	/* Register sysfs hooks */
19f2c059 GR	264	err = sysfs_create_group(&client->dev.kobj, &ds1621_group);
19f2c059 GR	265	if (err)
e20b4b38	266	return err;
a5ebe668	267
1beeffe4 TJ	268	data->hwmon_dev = hwmon_device_register(&client->dev);
	269	if (IS_ERR(data->hwmon_dev)) {
	270	err = PTR_ERR(data->hwmon_dev);
a5ebe668	271	goto exit_remove_files;
943b0830 MH	272	}
943b0830 MH	273
1da177e4 LT	274	return 0;
1da177e4 LT	275
19f2c059	276	exit_remove_files:
75819f01	277	sysfs_remove_group(&client->dev.kobj, &ds1621_group);
1da177e4 LT	278	return err;
	279	}
	280
70313eab	281	static int ds1621_remove(struct i2c_client *client)
1da177e4	282	{
943b0830	283	struct ds1621_data *data = i2c_get_clientdata(client);
1da177e4	284
1beeffe4	285	hwmon_device_unregister(data->hwmon_dev);
a5ebe668	286	sysfs_remove_group(&client->dev.kobj, &ds1621_group);
943b0830	287
1da177e4 LT	288	return 0;
	289	}
	290
9202add6	291	static const struct i2c_device_id ds1621_id[] = {
1f86df49 JD	292	{ "ds1621", 0 },
1f86df49 JD	293	{ "ds1625", 0 },
9202add6 JD	294	{ }
	295	};
	296	MODULE_DEVICE_TABLE(i2c, ds1621_id);
1da177e4	297
9202add6 JD	298	/* This is the driver that will be inserted */
	299	static struct i2c_driver ds1621_driver = {
	300	.class = I2C_CLASS_HWMON,
	301	.driver = {
	302	.name = "ds1621",
	303	},
	304	.probe = ds1621_probe,
	305	.remove = ds1621_remove,
	306	.id_table = ds1621_id,
	307	.detect = ds1621_detect,
c3813d6a	308	.address_list = normal_i2c,
9202add6	309	};
1da177e4	310
f0967eea	311	module_i2c_driver(ds1621_driver);
1da177e4 LT	312
	313	MODULE_AUTHOR("Christian W. Zuckschwerdt <zany@triq.net>");
	314	MODULE_DESCRIPTION("DS1621 driver");
	315	MODULE_LICENSE("GPL");