[linux.git] / drivers / hwmon / max1619.c

/*
 * max1619.c - Part of lm_sensors, Linux kernel modules for hardware
 *             monitoring
 * Copyright (C) 2003-2004 Alexey Fisher <[email protected]>
 *                         Jean Delvare <[email protected]>
 *
 * Based on the lm90 driver. The MAX1619 is a sensor chip made by Maxim.
 * It reports up to two temperatures (its own plus up to
 * one external one). Complete datasheet can be
 * obtained from Maxim's website at:
 *   http://pdfserv.maxim-ic.com/en/ds/MAX1619.pdf
 *
 * 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/err.h>
#include <linux/mutex.h>
#include <linux/sysfs.h>

static unsigned short normal_i2c[] = { 0x18, 0x19, 0x1a,
					0x29, 0x2a, 0x2b,
					0x4c, 0x4d, 0x4e,
					I2C_CLIENT_END };

/*
 * Insmod parameters
 */

I2C_CLIENT_INSMOD_1(max1619);

/*
 * The MAX1619 registers
 */

#define MAX1619_REG_R_MAN_ID		0xFE
#define MAX1619_REG_R_CHIP_ID		0xFF
#define MAX1619_REG_R_CONFIG		0x03
#define MAX1619_REG_W_CONFIG		0x09
#define MAX1619_REG_R_CONVRATE		0x04
#define MAX1619_REG_W_CONVRATE		0x0A
#define MAX1619_REG_R_STATUS		0x02
#define MAX1619_REG_R_LOCAL_TEMP	0x00
#define MAX1619_REG_R_REMOTE_TEMP	0x01
#define MAX1619_REG_R_REMOTE_HIGH	0x07
#define MAX1619_REG_W_REMOTE_HIGH	0x0D
#define MAX1619_REG_R_REMOTE_LOW	0x08
#define MAX1619_REG_W_REMOTE_LOW	0x0E
#define MAX1619_REG_R_REMOTE_CRIT	0x10
#define MAX1619_REG_W_REMOTE_CRIT	0x12
#define MAX1619_REG_R_TCRIT_HYST	0x11
#define MAX1619_REG_W_TCRIT_HYST	0x13

/*
 * Conversions and various macros
 */

#define TEMP_FROM_REG(val)	((val & 0x80 ? val-0x100 : val) * 1000)
#define TEMP_TO_REG(val)	((val < 0 ? val+0x100*1000 : val) / 1000)

/*
 * Functions declaration
 */

static int max1619_attach_adapter(struct i2c_adapter *adapter);
static int max1619_detect(struct i2c_adapter *adapter, int address,
	int kind);
static void max1619_init_client(struct i2c_client *client);
static int max1619_detach_client(struct i2c_client *client);
static struct max1619_data *max1619_update_device(struct device *dev);

/*
 * Driver data (common to all clients)
 */

static struct i2c_driver max1619_driver = {
	.driver = {
		.name	= "max1619",
	},
	.attach_adapter	= max1619_attach_adapter,
	.detach_client	= max1619_detach_client,
};

/*
 * Client data (each client gets its own)
 */

struct max1619_data {
	struct i2c_client client;
	struct device *hwmon_dev;
	struct mutex update_lock;
	char valid; /* zero until following fields are valid */
	unsigned long last_updated; /* in jiffies */

	/* registers values */
	u8 temp_input1; /* local */
	u8 temp_input2, temp_low2, temp_high2; /* remote */
	u8 temp_crit2;
	u8 temp_hyst2;
	u8 alarms; 
};

/*
 * Sysfs stuff
 */

#define show_temp(value) \
static ssize_t show_##value(struct device *dev, struct device_attribute *attr, char *buf) \
{ \
	struct max1619_data *data = max1619_update_device(dev); \
	return sprintf(buf, "%d\n", TEMP_FROM_REG(data->value)); \
}
show_temp(temp_input1);
show_temp(temp_input2);
show_temp(temp_low2);
show_temp(temp_high2);
show_temp(temp_crit2);
show_temp(temp_hyst2);

#define set_temp2(value, reg) \
static ssize_t set_##value(struct device *dev, struct device_attribute *attr, const char *buf, \
	size_t count) \
{ \
	struct i2c_client *client = to_i2c_client(dev); \
	struct max1619_data *data = i2c_get_clientdata(client); \
	long val = simple_strtol(buf, NULL, 10); \
 \
	mutex_lock(&data->update_lock); \
	data->value = TEMP_TO_REG(val); \
	i2c_smbus_write_byte_data(client, reg, data->value); \
	mutex_unlock(&data->update_lock); \
	return count; \
}

set_temp2(temp_low2, MAX1619_REG_W_REMOTE_LOW);
set_temp2(temp_high2, MAX1619_REG_W_REMOTE_HIGH);
set_temp2(temp_crit2, MAX1619_REG_W_REMOTE_CRIT);
set_temp2(temp_hyst2, MAX1619_REG_W_TCRIT_HYST);

static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct max1619_data *data = max1619_update_device(dev);
	return sprintf(buf, "%d\n", data->alarms);
}

static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input1, NULL);
static DEVICE_ATTR(temp2_input, S_IRUGO, show_temp_input2, NULL);
static DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp_low2,
	set_temp_low2);
static DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp_high2,
	set_temp_high2);
static DEVICE_ATTR(temp2_crit, S_IWUSR | S_IRUGO, show_temp_crit2,
	set_temp_crit2);
static DEVICE_ATTR(temp2_crit_hyst, S_IWUSR | S_IRUGO, show_temp_hyst2,
	set_temp_hyst2);
static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);

static struct attribute *max1619_attributes[] = {
	&dev_attr_temp1_input.attr,
	&dev_attr_temp2_input.attr,
	&dev_attr_temp2_min.attr,
	&dev_attr_temp2_max.attr,
	&dev_attr_temp2_crit.attr,
	&dev_attr_temp2_crit_hyst.attr,

	&dev_attr_alarms.attr,
	NULL
};

static const struct attribute_group max1619_group = {
	.attrs = max1619_attributes,
};

/*
 * Real code
 */

static int max1619_attach_adapter(struct i2c_adapter *adapter)
{
	if (!(adapter->class & I2C_CLASS_HWMON))
		return 0;
	return i2c_probe(adapter, &addr_data, max1619_detect);
}

/*
 * The following function does more than just detection. If detection
 * succeeds, it also registers the new chip.
 */
static int max1619_detect(struct i2c_adapter *adapter, int address, int kind)
{
	struct i2c_client *new_client;
	struct max1619_data *data;
	int err = 0;
	const char *name = "";	
	u8 reg_config=0, reg_convrate=0, reg_status=0;

	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
		goto exit;

	if (!(data = kzalloc(sizeof(struct max1619_data), GFP_KERNEL))) {
		err = -ENOMEM;
		goto exit;
	}

	/* The common I2C client data is placed right before the
	   MAX1619-specific data. */
	new_client = &data->client;
	i2c_set_clientdata(new_client, data);
	new_client->addr = address;
	new_client->adapter = adapter;
	new_client->driver = &max1619_driver;
	new_client->flags = 0;

	/*
	 * Now we do the remaining detection. A negative kind means that
	 * the driver was loaded with no force parameter (default), so we
	 * must both detect and identify the chip. A zero kind means that
	 * the driver was loaded with the force parameter, the detection
	 * step shall be skipped. A positive kind means that the driver
	 * was loaded with the force parameter and a given kind of chip is
	 * requested, so both the detection and the identification steps
	 * are skipped.
	 */
	if (kind < 0) { /* detection */
		reg_config = i2c_smbus_read_byte_data(new_client,
			      MAX1619_REG_R_CONFIG);
		reg_convrate = i2c_smbus_read_byte_data(new_client,
			       MAX1619_REG_R_CONVRATE);
		reg_status = i2c_smbus_read_byte_data(new_client,
				MAX1619_REG_R_STATUS);
		if ((reg_config & 0x03) != 0x00
		 || reg_convrate > 0x07 || (reg_status & 0x61 ) !=0x00) {
			dev_dbg(&adapter->dev,
				"MAX1619 detection failed at 0x%02x.\n",
				address);
			goto exit_free;
		}
	}

	if (kind <= 0) { /* identification */
		u8 man_id, chip_id;
	
		man_id = i2c_smbus_read_byte_data(new_client,
			 MAX1619_REG_R_MAN_ID);
		chip_id = i2c_smbus_read_byte_data(new_client,
			  MAX1619_REG_R_CHIP_ID);
		
		if ((man_id == 0x4D) && (chip_id == 0x04))
			kind = max1619;

		if (kind <= 0) { /* identification failed */
			dev_info(&adapter->dev,
			    "Unsupported chip (man_id=0x%02X, "
			    "chip_id=0x%02X).\n", man_id, chip_id);
			goto exit_free;
		}
	}

	if (kind == max1619)
		name = "max1619";

	/* We can fill in the remaining client fields */
	strlcpy(new_client->name, name, I2C_NAME_SIZE);
	data->valid = 0;
	mutex_init(&data->update_lock);

	/* Tell the I2C layer a new client has arrived */
	if ((err = i2c_attach_client(new_client)))
		goto exit_free;

	/* Initialize the MAX1619 chip */
	max1619_init_client(new_client);

	/* Register sysfs hooks */
	if ((err = sysfs_create_group(&new_client->dev.kobj, &max1619_group)))
		goto exit_detach;

	data->hwmon_dev = hwmon_device_register(&new_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(&new_client->dev.kobj, &max1619_group);
exit_detach:
	i2c_detach_client(new_client);
exit_free:
	kfree(data);
exit:
	return err;
}

static void max1619_init_client(struct i2c_client *client)
{
	u8 config;

	/*
	 * Start the conversions.
	 */
	i2c_smbus_write_byte_data(client, MAX1619_REG_W_CONVRATE,
				  5); /* 2 Hz */
	config = i2c_smbus_read_byte_data(client, MAX1619_REG_R_CONFIG);
	if (config & 0x40)
		i2c_smbus_write_byte_data(client, MAX1619_REG_W_CONFIG,
					  config & 0xBF); /* run */
}

static int max1619_detach_client(struct i2c_client *client)
{
	struct max1619_data *data = i2c_get_clientdata(client);
	int err;

	hwmon_device_unregister(data->hwmon_dev);
	sysfs_remove_group(&client->dev.kobj, &max1619_group);

	if ((err = i2c_detach_client(client)))
		return err;

	kfree(data);
	return 0;
}

static struct max1619_data *max1619_update_device(struct device *dev)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct max1619_data *data = i2c_get_clientdata(client);

	mutex_lock(&data->update_lock);

	if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) {
		dev_dbg(&client->dev, "Updating max1619 data.\n");
		data->temp_input1 = i2c_smbus_read_byte_data(client,
					MAX1619_REG_R_LOCAL_TEMP);
		data->temp_input2 = i2c_smbus_read_byte_data(client,
					MAX1619_REG_R_REMOTE_TEMP);
		data->temp_high2 = i2c_smbus_read_byte_data(client,
					MAX1619_REG_R_REMOTE_HIGH);
		data->temp_low2 = i2c_smbus_read_byte_data(client,
					MAX1619_REG_R_REMOTE_LOW);
		data->temp_crit2 = i2c_smbus_read_byte_data(client,
					MAX1619_REG_R_REMOTE_CRIT);
		data->temp_hyst2 = i2c_smbus_read_byte_data(client,
					MAX1619_REG_R_TCRIT_HYST);
		data->alarms = i2c_smbus_read_byte_data(client,
					MAX1619_REG_R_STATUS);

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

	mutex_unlock(&data->update_lock);

	return data;
}

static int __init sensors_max1619_init(void)
{
	return i2c_add_driver(&max1619_driver);
}

static void __exit sensors_max1619_exit(void)
{
	i2c_del_driver(&max1619_driver);
}

MODULE_AUTHOR("Alexey Fisher <[email protected]> and "
	"Jean Delvare <[email protected]>");
MODULE_DESCRIPTION("MAX1619 sensor driver");
MODULE_LICENSE("GPL");

module_init(sensors_max1619_init);
module_exit(sensors_max1619_exit);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* max1619.c - Part of lm_sensors, Linux kernel modules for hardware
	3	* monitoring
	4	* Copyright (C) 2003-2004 Alexey Fisher <[email protected]>
	5	* Jean Delvare <[email protected]>
	6	*
	7	* Based on the lm90 driver. The MAX1619 is a sensor chip made by Maxim.
	8	* It reports up to two temperatures (its own plus up to
	9	* one external one). Complete datasheet can be
	10	* obtained from Maxim's website at:
	11	* http://pdfserv.maxim-ic.com/en/ds/MAX1619.pdf
	12	*
	13	* This program is free software; you can redistribute it and/or modify
	14	* it under the terms of the GNU General Public License as published by
	15	* the Free Software Foundation; either version 2 of the License, or
	16	* (at your option) any later version.
	17	*
	18	* This program is distributed in the hope that it will be useful,
	19	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	20	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	21	* GNU General Public License for more details.
	22	*
	23	* You should have received a copy of the GNU General Public License
	24	* along with this program; if not, write to the Free Software
	25	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	26	*/
	27
	28
1da177e4 LT	29	#include <linux/module.h>
	30	#include <linux/init.h>
	31	#include <linux/slab.h>
	32	#include <linux/jiffies.h>
	33	#include <linux/i2c.h>
943b0830 MH	34	#include <linux/hwmon.h>
943b0830 MH	35	#include <linux/err.h>
9a61bf63	36	#include <linux/mutex.h>
a5ebe668	37	#include <linux/sysfs.h>
1da177e4 LT	38
	39	static unsigned short normal_i2c[] = { 0x18, 0x19, 0x1a,
	40	0x29, 0x2a, 0x2b,
	41	0x4c, 0x4d, 0x4e,
	42	I2C_CLIENT_END };
1da177e4 LT	43
	44	/*
	45	* Insmod parameters
	46	*/
	47
f4b50261	48	I2C_CLIENT_INSMOD_1(max1619);
1da177e4 LT	49
	50	/*
	51	* The MAX1619 registers
	52	*/
	53
	54	#define MAX1619_REG_R_MAN_ID 0xFE
	55	#define MAX1619_REG_R_CHIP_ID 0xFF
	56	#define MAX1619_REG_R_CONFIG 0x03
	57	#define MAX1619_REG_W_CONFIG 0x09
	58	#define MAX1619_REG_R_CONVRATE 0x04
	59	#define MAX1619_REG_W_CONVRATE 0x0A
	60	#define MAX1619_REG_R_STATUS 0x02
	61	#define MAX1619_REG_R_LOCAL_TEMP 0x00
	62	#define MAX1619_REG_R_REMOTE_TEMP 0x01
	63	#define MAX1619_REG_R_REMOTE_HIGH 0x07
	64	#define MAX1619_REG_W_REMOTE_HIGH 0x0D
	65	#define MAX1619_REG_R_REMOTE_LOW 0x08
	66	#define MAX1619_REG_W_REMOTE_LOW 0x0E
	67	#define MAX1619_REG_R_REMOTE_CRIT 0x10
	68	#define MAX1619_REG_W_REMOTE_CRIT 0x12
	69	#define MAX1619_REG_R_TCRIT_HYST 0x11
	70	#define MAX1619_REG_W_TCRIT_HYST 0x13
	71
	72	/*
	73	* Conversions and various macros
	74	*/
	75
	76	#define TEMP_FROM_REG(val) ((val & 0x80 ? val-0x100 : val) * 1000)
	77	#define TEMP_TO_REG(val) ((val < 0 ? val+0x100*1000 : val) / 1000)
	78
	79	/*
	80	* Functions declaration
	81	*/
	82
	83	static int max1619_attach_adapter(struct i2c_adapter *adapter);
	84	static int max1619_detect(struct i2c_adapter *adapter, int address,
	85	int kind);
	86	static void max1619_init_client(struct i2c_client *client);
	87	static int max1619_detach_client(struct i2c_client *client);
	88	static struct max1619_data max1619_update_device(struct device dev);
	89
	90	/*
	91	* Driver data (common to all clients)
	92	*/
	93
	94	static struct i2c_driver max1619_driver = {
cdaf7934	95	.driver = {
cdaf7934 LR	96	.name = "max1619",
cdaf7934 LR	97	},
1da177e4 LT	98	.attach_adapter = max1619_attach_adapter,
	99	.detach_client = max1619_detach_client,
	100	};
	101
	102	/*
	103	* Client data (each client gets its own)
	104	*/
	105
	106	struct max1619_data {
	107	struct i2c_client client;
1beeffe4	108	struct device *hwmon_dev;
9a61bf63	109	struct mutex update_lock;
1da177e4 LT	110	char valid; /* zero until following fields are valid */
	111	unsigned long last_updated; /* in jiffies */
	112
	113	/* registers values */
	114	u8 temp_input1; /* local */
	115	u8 temp_input2, temp_low2, temp_high2; /* remote */
	116	u8 temp_crit2;
	117	u8 temp_hyst2;
	118	u8 alarms;
	119	};
	120
	121	/*
	122	* Sysfs stuff
	123	*/
	124
	125	#define show_temp(value) \
8627f9ba	126	static ssize_t show_##value(struct device dev, struct device_attribute attr, char *buf) \
1da177e4 LT	127	{ \
	128	struct max1619_data *data = max1619_update_device(dev); \
	129	return sprintf(buf, "%d\n", TEMP_FROM_REG(data->value)); \
	130	}
	131	show_temp(temp_input1);
	132	show_temp(temp_input2);
	133	show_temp(temp_low2);
	134	show_temp(temp_high2);
	135	show_temp(temp_crit2);
	136	show_temp(temp_hyst2);
	137
	138	#define set_temp2(value, reg) \
8627f9ba	139	static ssize_t set_##value(struct device dev, struct device_attribute attr, const char *buf, \
1da177e4 LT	140	size_t count) \
	141	{ \
	142	struct i2c_client *client = to_i2c_client(dev); \
	143	struct max1619_data *data = i2c_get_clientdata(client); \
	144	long val = simple_strtol(buf, NULL, 10); \
	145	\
9a61bf63	146	mutex_lock(&data->update_lock); \
1da177e4 LT	147	data->value = TEMP_TO_REG(val); \
1da177e4 LT	148	i2c_smbus_write_byte_data(client, reg, data->value); \
9a61bf63	149	mutex_unlock(&data->update_lock); \
1da177e4 LT	150	return count; \
	151	}
	152
	153	set_temp2(temp_low2, MAX1619_REG_W_REMOTE_LOW);
	154	set_temp2(temp_high2, MAX1619_REG_W_REMOTE_HIGH);
	155	set_temp2(temp_crit2, MAX1619_REG_W_REMOTE_CRIT);
	156	set_temp2(temp_hyst2, MAX1619_REG_W_TCRIT_HYST);
	157
8627f9ba	158	static ssize_t show_alarms(struct device dev, struct device_attribute attr, char *buf)
1da177e4 LT	159	{
	160	struct max1619_data *data = max1619_update_device(dev);
	161	return sprintf(buf, "%d\n", data->alarms);
	162	}
	163
	164	static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input1, NULL);
	165	static DEVICE_ATTR(temp2_input, S_IRUGO, show_temp_input2, NULL);
	166	static DEVICE_ATTR(temp2_min, S_IWUSR \| S_IRUGO, show_temp_low2,
	167	set_temp_low2);
	168	static DEVICE_ATTR(temp2_max, S_IWUSR \| S_IRUGO, show_temp_high2,
	169	set_temp_high2);
	170	static DEVICE_ATTR(temp2_crit, S_IWUSR \| S_IRUGO, show_temp_crit2,
	171	set_temp_crit2);
	172	static DEVICE_ATTR(temp2_crit_hyst, S_IWUSR \| S_IRUGO, show_temp_hyst2,
	173	set_temp_hyst2);
	174	static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
	175
a5ebe668 JD	176	static struct attribute *max1619_attributes[] = {
	177	&dev_attr_temp1_input.attr,
	178	&dev_attr_temp2_input.attr,
	179	&dev_attr_temp2_min.attr,
	180	&dev_attr_temp2_max.attr,
	181	&dev_attr_temp2_crit.attr,
	182	&dev_attr_temp2_crit_hyst.attr,
	183
	184	&dev_attr_alarms.attr,
	185	NULL
	186	};
	187
	188	static const struct attribute_group max1619_group = {
	189	.attrs = max1619_attributes,
	190	};
	191
1da177e4 LT	192	/*
	193	* Real code
	194	*/
	195
	196	static int max1619_attach_adapter(struct i2c_adapter *adapter)
	197	{
	198	if (!(adapter->class & I2C_CLASS_HWMON))
	199	return 0;
2ed2dc3c	200	return i2c_probe(adapter, &addr_data, max1619_detect);
1da177e4 LT	201	}
	202
	203	/*
	204	* The following function does more than just detection. If detection
	205	* succeeds, it also registers the new chip.
	206	*/
	207	static int max1619_detect(struct i2c_adapter *adapter, int address, int kind)
	208	{
	209	struct i2c_client *new_client;
	210	struct max1619_data *data;
	211	int err = 0;
	212	const char *name = "";
	213	u8 reg_config=0, reg_convrate=0, reg_status=0;
b0020e3f	214
1da177e4 LT	215	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
	216	goto exit;
	217
ba9c2e8d	218	if (!(data = kzalloc(sizeof(struct max1619_data), GFP_KERNEL))) {
1da177e4 LT	219	err = -ENOMEM;
	220	goto exit;
	221	}
1da177e4 LT	222
	223	/* The common I2C client data is placed right before the
	224	MAX1619-specific data. */
	225	new_client = &data->client;
	226	i2c_set_clientdata(new_client, data);
	227	new_client->addr = address;
	228	new_client->adapter = adapter;
	229	new_client->driver = &max1619_driver;
	230	new_client->flags = 0;
	231
	232	/*
	233	* Now we do the remaining detection. A negative kind means that
	234	* the driver was loaded with no force parameter (default), so we
	235	* must both detect and identify the chip. A zero kind means that
	236	* the driver was loaded with the force parameter, the detection
	237	* step shall be skipped. A positive kind means that the driver
	238	* was loaded with the force parameter and a given kind of chip is
	239	* requested, so both the detection and the identification steps
	240	* are skipped.
	241	*/
	242	if (kind < 0) { /* detection */
	243	reg_config = i2c_smbus_read_byte_data(new_client,
	244	MAX1619_REG_R_CONFIG);
	245	reg_convrate = i2c_smbus_read_byte_data(new_client,
	246	MAX1619_REG_R_CONVRATE);
	247	reg_status = i2c_smbus_read_byte_data(new_client,
	248	MAX1619_REG_R_STATUS);
	249	if ((reg_config & 0x03) != 0x00
	250	\|\| reg_convrate > 0x07 \|\| (reg_status & 0x61 ) !=0x00) {
	251	dev_dbg(&adapter->dev,
	252	"MAX1619 detection failed at 0x%02x.\n",
	253	address);
	254	goto exit_free;
	255	}
	256	}
	257
	258	if (kind <= 0) { /* identification */
b0020e3f	259	u8 man_id, chip_id;
1da177e4 LT	260
	261	man_id = i2c_smbus_read_byte_data(new_client,
	262	MAX1619_REG_R_MAN_ID);
	263	chip_id = i2c_smbus_read_byte_data(new_client,
	264	MAX1619_REG_R_CHIP_ID);
	265
b0020e3f AM	266	if ((man_id == 0x4D) && (chip_id == 0x04))
b0020e3f AM	267	kind = max1619;
1da177e4 LT	268
	269	if (kind <= 0) { /* identification failed */
	270	dev_info(&adapter->dev,
	271	"Unsupported chip (man_id=0x%02X, "
	272	"chip_id=0x%02X).\n", man_id, chip_id);
	273	goto exit_free;
	274	}
b0020e3f	275	}
1da177e4	276
b0020e3f	277	if (kind == max1619)
1da177e4	278	name = "max1619";
1da177e4 LT	279
	280	/* We can fill in the remaining client fields */
	281	strlcpy(new_client->name, name, I2C_NAME_SIZE);
	282	data->valid = 0;
9a61bf63	283	mutex_init(&data->update_lock);
1da177e4 LT	284
	285	/* Tell the I2C layer a new client has arrived */
	286	if ((err = i2c_attach_client(new_client)))
	287	goto exit_free;
	288
	289	/* Initialize the MAX1619 chip */
	290	max1619_init_client(new_client);
	291
	292	/* Register sysfs hooks */
a5ebe668 JD	293	if ((err = sysfs_create_group(&new_client->dev.kobj, &max1619_group)))
	294	goto exit_detach;
	295
1beeffe4 TJ	296	data->hwmon_dev = hwmon_device_register(&new_client->dev);
	297	if (IS_ERR(data->hwmon_dev)) {
	298	err = PTR_ERR(data->hwmon_dev);
a5ebe668	299	goto exit_remove_files;
943b0830 MH	300	}
943b0830 MH	301
1da177e4 LT	302	return 0;
1da177e4 LT	303
a5ebe668 JD	304	exit_remove_files:
a5ebe668 JD	305	sysfs_remove_group(&new_client->dev.kobj, &max1619_group);
943b0830 MH	306	exit_detach:
943b0830 MH	307	i2c_detach_client(new_client);
1da177e4 LT	308	exit_free:
	309	kfree(data);
	310	exit:
	311	return err;
	312	}
	313
	314	static void max1619_init_client(struct i2c_client *client)
	315	{
	316	u8 config;
	317
	318	/*
	319	* Start the conversions.
	320	*/
	321	i2c_smbus_write_byte_data(client, MAX1619_REG_W_CONVRATE,
	322	5); /* 2 Hz */
	323	config = i2c_smbus_read_byte_data(client, MAX1619_REG_R_CONFIG);
	324	if (config & 0x40)
	325	i2c_smbus_write_byte_data(client, MAX1619_REG_W_CONFIG,
	326	config & 0xBF); /* run */
	327	}
	328
	329	static int max1619_detach_client(struct i2c_client *client)
	330	{
943b0830	331	struct max1619_data *data = i2c_get_clientdata(client);
1da177e4 LT	332	int err;
1da177e4 LT	333
1beeffe4	334	hwmon_device_unregister(data->hwmon_dev);
a5ebe668	335	sysfs_remove_group(&client->dev.kobj, &max1619_group);
943b0830	336
7bef5594	337	if ((err = i2c_detach_client(client)))
1da177e4	338	return err;
1da177e4	339
943b0830	340	kfree(data);
1da177e4 LT	341	return 0;
	342	}
	343
	344	static struct max1619_data max1619_update_device(struct device dev)
	345	{
	346	struct i2c_client *client = to_i2c_client(dev);
	347	struct max1619_data *data = i2c_get_clientdata(client);
	348
9a61bf63	349	mutex_lock(&data->update_lock);
1da177e4 LT	350
	351	if (time_after(jiffies, data->last_updated + HZ * 2) \|\| !data->valid) {
	352	dev_dbg(&client->dev, "Updating max1619 data.\n");
	353	data->temp_input1 = i2c_smbus_read_byte_data(client,
	354	MAX1619_REG_R_LOCAL_TEMP);
	355	data->temp_input2 = i2c_smbus_read_byte_data(client,
	356	MAX1619_REG_R_REMOTE_TEMP);
	357	data->temp_high2 = i2c_smbus_read_byte_data(client,
	358	MAX1619_REG_R_REMOTE_HIGH);
	359	data->temp_low2 = i2c_smbus_read_byte_data(client,
	360	MAX1619_REG_R_REMOTE_LOW);
	361	data->temp_crit2 = i2c_smbus_read_byte_data(client,
	362	MAX1619_REG_R_REMOTE_CRIT);
	363	data->temp_hyst2 = i2c_smbus_read_byte_data(client,
	364	MAX1619_REG_R_TCRIT_HYST);
	365	data->alarms = i2c_smbus_read_byte_data(client,
	366	MAX1619_REG_R_STATUS);
	367
	368	data->last_updated = jiffies;
	369	data->valid = 1;
	370	}
	371
9a61bf63	372	mutex_unlock(&data->update_lock);
1da177e4 LT	373
	374	return data;
	375	}
	376
	377	static int __init sensors_max1619_init(void)
	378	{
	379	return i2c_add_driver(&max1619_driver);
	380	}
	381
	382	static void __exit sensors_max1619_exit(void)
	383	{
	384	i2c_del_driver(&max1619_driver);
	385	}
	386
368609c5	387	MODULE_AUTHOR("Alexey Fisher <[email protected]> and "
1da177e4 LT	388	"Jean Delvare <[email protected]>");
	389	MODULE_DESCRIPTION("MAX1619 sensor driver");
	390	MODULE_LICENSE("GPL");
	391
	392	module_init(sensors_max1619_init);
	393	module_exit(sensors_max1619_exit);