drivers/hwmon/thmc50.c - arm/linux-arm64-legacy - Git at Google

 /*
     thmc50.c - Part of lm_sensors, Linux kernel modules for hardware
              monitoring
     Copyright (C) 2007 Krzysztof Helt <krzysztof.h1@wp.pl>
     Based on 2.4 driver by Frodo Looijaard <frodol@dds.nl> and
     Philip Edelbrock <phil@netroedge.com>

     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/i2c.h>
 #include <linux/hwmon.h>
 #include <linux/hwmon-sysfs.h>
 #include <linux/err.h>
 #include <linux/mutex.h>

 MODULE_LICENSE("GPL");

 /* Addresses to scan */
 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };

 /* Insmod parameters */
 I2C_CLIENT_INSMOD_2(thmc50, adm1022);
 I2C_CLIENT_MODULE_PARM(adm1022_temp3, "List of adapter,address pairs "
 			"to enable 3rd temperature (ADM1022 only)");

 /* Many THMC50 constants specified below */

 /* The THMC50 registers */
 #define THMC50_REG_CONF				0x40
 #define THMC50_REG_COMPANY_ID			0x3E
 #define THMC50_REG_DIE_CODE			0x3F
 #define THMC50_REG_ANALOG_OUT			0x19
 /*
  * The mirror status register cannot be used as
  * reading it does not clear alarms.
  */
 #define THMC50_REG_INTR				0x41

 static const u8 THMC50_REG_TEMP[] = { 0x27, 0x26, 0x20 };
 static const u8 THMC50_REG_TEMP_MIN[] = { 0x3A, 0x38, 0x2C };
 static const u8 THMC50_REG_TEMP_MAX[] = { 0x39, 0x37, 0x2B };
 static const u8 THMC50_REG_TEMP_CRITICAL[] = { 0x13, 0x14, 0x14 };
 static const u8 THMC50_REG_TEMP_DEFAULT[] = { 0x17, 0x18, 0x18 };

 #define THMC50_REG_CONF_nFANOFF			0x20
 #define THMC50_REG_CONF_PROGRAMMED		0x08

 /* Each client has this additional data */
 struct thmc50_data {
 	struct device *hwmon_dev;

 	struct mutex update_lock;
 	enum chips type;
 	unsigned long last_updated;	/* In jiffies */
 	char has_temp3;		/* !=0 if it is ADM1022 in temp3 mode */
 	char valid;		/* !=0 if following fields are valid */

 	/* Register values */
 	s8 temp_input[3];
 	s8 temp_max[3];
 	s8 temp_min[3];
 	s8 temp_critical[3];
 	u8 analog_out;
 	u8 alarms;
 };

 static int thmc50_detect(struct i2c_client *client, int kind,
 			 struct i2c_board_info *info);
 static int thmc50_probe(struct i2c_client *client,
 			const struct i2c_device_id *id);
 static int thmc50_remove(struct i2c_client *client);
 static void thmc50_init_client(struct i2c_client *client);
 static struct thmc50_data *thmc50_update_device(struct device *dev);

 static const struct i2c_device_id thmc50_id[] = {
 	{ "adm1022", adm1022 },
 	{ "thmc50", thmc50 },
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, thmc50_id);

 static struct i2c_driver thmc50_driver = {
 	.class = I2C_CLASS_HWMON,
 	.driver = {
 		.name = "thmc50",
 	},
 	.probe = thmc50_probe,
 	.remove = thmc50_remove,
 	.id_table = thmc50_id,
 	.detect = thmc50_detect,
 	.address_data = &addr_data,
 };

 static ssize_t show_analog_out(struct device *dev,
 			       struct device_attribute *attr, char *buf)
 {
 	struct thmc50_data *data = thmc50_update_device(dev);
 	return sprintf(buf, "%d\n", data->analog_out);
 }

 static ssize_t set_analog_out(struct device *dev,
 			      struct device_attribute *attr,
 			      const char *buf, size_t count)
 {
 	struct i2c_client *client = to_i2c_client(dev);
 	struct thmc50_data *data = i2c_get_clientdata(client);
 	int tmp = simple_strtoul(buf, NULL, 10);
 	int config;

 	mutex_lock(&data->update_lock);
 	data->analog_out = SENSORS_LIMIT(tmp, 0, 255);
 	i2c_smbus_write_byte_data(client, THMC50_REG_ANALOG_OUT,
 				  data->analog_out);

 	config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
 	if (data->analog_out == 0)
 		config &= ~THMC50_REG_CONF_nFANOFF;
 	else
 		config |= THMC50_REG_CONF_nFANOFF;
 	i2c_smbus_write_byte_data(client, THMC50_REG_CONF, config);

 	mutex_unlock(&data->update_lock);
 	return count;
 }

 /* There is only one PWM mode = DC */
 static ssize_t show_pwm_mode(struct device *dev, struct device_attribute *attr,
 			     char *buf)
 {
 	return sprintf(buf, "0\n");
 }

 /* Temperatures */
 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
 			 char *buf)
 {
 	int nr = to_sensor_dev_attr(attr)->index;
 	struct thmc50_data *data = thmc50_update_device(dev);
 	return sprintf(buf, "%d\n", data->temp_input[nr] * 1000);
 }

 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
 			     char *buf)
 {
 	int nr = to_sensor_dev_attr(attr)->index;
 	struct thmc50_data *data = thmc50_update_device(dev);
 	return sprintf(buf, "%d\n", data->temp_min[nr] * 1000);
 }

 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
 			    const char *buf, size_t count)
 {
 	int nr = to_sensor_dev_attr(attr)->index;
 	struct i2c_client *client = to_i2c_client(dev);
 	struct thmc50_data *data = i2c_get_clientdata(client);
 	int val = simple_strtol(buf, NULL, 10);

 	mutex_lock(&data->update_lock);
 	data->temp_min[nr] = SENSORS_LIMIT(val / 1000, -128, 127);
 	i2c_smbus_write_byte_data(client, THMC50_REG_TEMP_MIN[nr],
 				  data->temp_min[nr]);
 	mutex_unlock(&data->update_lock);
 	return count;
 }

 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
 			     char *buf)
 {
 	int nr = to_sensor_dev_attr(attr)->index;
 	struct thmc50_data *data = thmc50_update_device(dev);
 	return sprintf(buf, "%d\n", data->temp_max[nr] * 1000);
 }

 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
 			    const char *buf, size_t count)
 {
 	int nr = to_sensor_dev_attr(attr)->index;
 	struct i2c_client *client = to_i2c_client(dev);
 	struct thmc50_data *data = i2c_get_clientdata(client);
 	int val = simple_strtol(buf, NULL, 10);

 	mutex_lock(&data->update_lock);
 	data->temp_max[nr] = SENSORS_LIMIT(val / 1000, -128, 127);
 	i2c_smbus_write_byte_data(client, THMC50_REG_TEMP_MAX[nr],
 				  data->temp_max[nr]);
 	mutex_unlock(&data->update_lock);
 	return count;
 }

 static ssize_t show_temp_critical(struct device *dev,
 				  struct device_attribute *attr,
 				  char *buf)
 {
 	int nr = to_sensor_dev_attr(attr)->index;
 	struct thmc50_data *data = thmc50_update_device(dev);
 	return sprintf(buf, "%d\n", data->temp_critical[nr] * 1000);
 }

 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
 			  char *buf)
 {
 	int index = to_sensor_dev_attr(attr)->index;
 	struct thmc50_data *data = thmc50_update_device(dev);

 	return sprintf(buf, "%u\n", (data->alarms >> index) & 1);
 }

 #define temp_reg(offset)						\
 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp,	\
 			NULL, offset - 1);				\
 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR,	\
 			show_temp_min, set_temp_min, offset - 1);	\
 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR,	\
 			show_temp_max, set_temp_max, offset - 1);	\
 static SENSOR_DEVICE_ATTR(temp##offset##_crit, S_IRUGO,			\
 			show_temp_critical, NULL, offset - 1);

 temp_reg(1);
 temp_reg(2);
 temp_reg(3);

 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 0);
 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5);
 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 1);
 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 7);
 static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 2);

 static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_analog_out,
 			  set_analog_out, 0);
 static SENSOR_DEVICE_ATTR(pwm1_mode, S_IRUGO, show_pwm_mode, NULL, 0);

 static struct attribute *thmc50_attributes[] = {
 	&sensor_dev_attr_temp1_max.dev_attr.attr,
 	&sensor_dev_attr_temp1_min.dev_attr.attr,
 	&sensor_dev_attr_temp1_input.dev_attr.attr,
 	&sensor_dev_attr_temp1_crit.dev_attr.attr,
 	&sensor_dev_attr_temp1_alarm.dev_attr.attr,
 	&sensor_dev_attr_temp2_max.dev_attr.attr,
 	&sensor_dev_attr_temp2_min.dev_attr.attr,
 	&sensor_dev_attr_temp2_input.dev_attr.attr,
 	&sensor_dev_attr_temp2_crit.dev_attr.attr,
 	&sensor_dev_attr_temp2_alarm.dev_attr.attr,
 	&sensor_dev_attr_temp2_fault.dev_attr.attr,
 	&sensor_dev_attr_pwm1.dev_attr.attr,
 	&sensor_dev_attr_pwm1_mode.dev_attr.attr,
 	NULL
 };

 static const struct attribute_group thmc50_group = {
 	.attrs = thmc50_attributes,
 };

 /* for ADM1022 3rd temperature mode */
 static struct attribute *temp3_attributes[] = {
 	&sensor_dev_attr_temp3_max.dev_attr.attr,
 	&sensor_dev_attr_temp3_min.dev_attr.attr,
 	&sensor_dev_attr_temp3_input.dev_attr.attr,
 	&sensor_dev_attr_temp3_crit.dev_attr.attr,
 	&sensor_dev_attr_temp3_alarm.dev_attr.attr,
 	&sensor_dev_attr_temp3_fault.dev_attr.attr,
 	NULL
 };

 static const struct attribute_group temp3_group = {
 	.attrs = temp3_attributes,
 };

 /* Return 0 if detection is successful, -ENODEV otherwise */
 static int thmc50_detect(struct i2c_client *client, int kind,
 			 struct i2c_board_info *info)
 {
 	unsigned company;
 	unsigned revision;
 	unsigned config;
 	struct i2c_adapter *adapter = client->adapter;
 	const char *type_name;

 	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
 		pr_debug("thmc50: detect failed, "
 			 "smbus byte data not supported!\n");
 		return -ENODEV;
 	}

 	pr_debug("thmc50: Probing for THMC50 at 0x%2X on bus %d\n",
 		 client->addr, i2c_adapter_id(client->adapter));

 	company = i2c_smbus_read_byte_data(client, THMC50_REG_COMPANY_ID);
 	revision = i2c_smbus_read_byte_data(client, THMC50_REG_DIE_CODE);
 	config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
 	if (revision < 0xc0 || (config & 0x10))
 		return -ENODEV;

 	if (company == 0x41) {
 		int id = i2c_adapter_id(client->adapter);
 		int i;

 		type_name = "adm1022";
 		for (i = 0; i + 1 < adm1022_temp3_num; i += 2)
 			if (adm1022_temp3[i] == id &&
 			    adm1022_temp3[i + 1] == client->addr) {
 				/* enable 2nd remote temp */
 				config |= (1 << 7);
 				i2c_smbus_write_byte_data(client,
 							  THMC50_REG_CONF,
 							  config);
 				break;
 			}
 	} else if (company == 0x49) {
 		type_name = "thmc50";
 	} else {
 		pr_debug("thmc50: Detection of THMC50/ADM1022 failed\n");
 		return -ENODEV;
 	}

 	pr_debug("thmc50: Detected %s (version %x, revision %x)\n",
 		 type_name, (revision >> 4) - 0xc, revision & 0xf);

 	strlcpy(info->type, type_name, I2C_NAME_SIZE);

 	return 0;
 }

 static int thmc50_probe(struct i2c_client *client,
 			const struct i2c_device_id *id)
 {
 	struct thmc50_data *data;
 	int err;

 	data = kzalloc(sizeof(struct thmc50_data), GFP_KERNEL);
 	if (!data) {
 		pr_debug("thmc50: detect failed, kzalloc failed!\n");
 		err = -ENOMEM;
 		goto exit;
 	}

 	i2c_set_clientdata(client, data);
 	data->type = id->driver_data;
 	mutex_init(&data->update_lock);

 	thmc50_init_client(client);

 	/* Register sysfs hooks */
 	if ((err = sysfs_create_group(&client->dev.kobj, &thmc50_group)))
 		goto exit_free;

 	/* Register ADM1022 sysfs hooks */
 	if (data->has_temp3)
 		if ((err = sysfs_create_group(&client->dev.kobj,
 					      &temp3_group)))
 			goto exit_remove_sysfs_thmc50;

 	/* Register a new directory entry with module sensors */
 	data->hwmon_dev = hwmon_device_register(&client->dev);
 	if (IS_ERR(data->hwmon_dev)) {
 		err = PTR_ERR(data->hwmon_dev);
 		goto exit_remove_sysfs;
 	}

 	return 0;

 exit_remove_sysfs:
 	if (data->has_temp3)
 		sysfs_remove_group(&client->dev.kobj, &temp3_group);
 exit_remove_sysfs_thmc50:
 	sysfs_remove_group(&client->dev.kobj, &thmc50_group);
 exit_free:
 	kfree(data);
 exit:
 	return err;
 }

 static int thmc50_remove(struct i2c_client *client)
 {
 	struct thmc50_data *data = i2c_get_clientdata(client);

 	hwmon_device_unregister(data->hwmon_dev);
 	sysfs_remove_group(&client->dev.kobj, &thmc50_group);
 	if (data->has_temp3)
 		sysfs_remove_group(&client->dev.kobj, &temp3_group);

 	kfree(data);

 	return 0;
 }

 static void thmc50_init_client(struct i2c_client *client)
 {
 	struct thmc50_data *data = i2c_get_clientdata(client);
 	int config;

 	data->analog_out = i2c_smbus_read_byte_data(client,
 						    THMC50_REG_ANALOG_OUT);
 	/* set up to at least 1 */
 	if (data->analog_out == 0) {
 		data->analog_out = 1;
 		i2c_smbus_write_byte_data(client, THMC50_REG_ANALOG_OUT,
 					  data->analog_out);
 	}
 	config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
 	config |= 0x1;	/* start the chip if it is in standby mode */
 	if (data->type == adm1022 && (config & (1 << 7)))
 		data->has_temp3 = 1;
 	i2c_smbus_write_byte_data(client, THMC50_REG_CONF, config);
 }

 static struct thmc50_data *thmc50_update_device(struct device *dev)
 {
 	struct i2c_client *client = to_i2c_client(dev);
 	struct thmc50_data *data = i2c_get_clientdata(client);
 	int timeout = HZ / 5 + (data->type == thmc50 ? HZ : 0);

 	mutex_lock(&data->update_lock);

 	if (time_after(jiffies, data->last_updated + timeout)
 	    || !data->valid) {

 		int temps = data->has_temp3 ? 3 : 2;
 		int i;
 		int prog = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);

 		prog &= THMC50_REG_CONF_PROGRAMMED;

 		for (i = 0; i < temps; i++) {
 			data->temp_input[i] = i2c_smbus_read_byte_data(client,
 						THMC50_REG_TEMP[i]);
 			data->temp_max[i] = i2c_smbus_read_byte_data(client,
 						THMC50_REG_TEMP_MAX[i]);
 			data->temp_min[i] = i2c_smbus_read_byte_data(client,
 						THMC50_REG_TEMP_MIN[i]);
 			data->temp_critical[i] =
 				i2c_smbus_read_byte_data(client,
 					prog ? THMC50_REG_TEMP_CRITICAL[i]
 					     : THMC50_REG_TEMP_DEFAULT[i]);
 		}
 		data->analog_out =
 		    i2c_smbus_read_byte_data(client, THMC50_REG_ANALOG_OUT);
 		data->alarms =
 		    i2c_smbus_read_byte_data(client, THMC50_REG_INTR);
 		data->last_updated = jiffies;
 		data->valid = 1;
 	}

 	mutex_unlock(&data->update_lock);

 	return data;
 }

 static int __init sm_thmc50_init(void)
 {
 	return i2c_add_driver(&thmc50_driver);
 }

 static void __exit sm_thmc50_exit(void)
 {
 	i2c_del_driver(&thmc50_driver);
 }

 MODULE_AUTHOR("Krzysztof Helt <krzysztof.h1@wp.pl>");
 MODULE_DESCRIPTION("THMC50 driver");

 module_init(sm_thmc50_init);
 module_exit(sm_thmc50_exit);
	/*
	thmc50.c - Part of lm_sensors, Linux kernel modules for hardware
	monitoring
	Copyright (C) 2007 Krzysztof Helt <krzysztof.h1@wp.pl>
	Based on 2.4 driver by Frodo Looijaard <frodol@dds.nl> and
	Philip Edelbrock <phil@netroedge.com>

	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/i2c.h>
	#include <linux/hwmon.h>
	#include <linux/hwmon-sysfs.h>
	#include <linux/err.h>
	#include <linux/mutex.h>

	MODULE_LICENSE("GPL");

	/* Addresses to scan */
	static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };

	/* Insmod parameters */
	I2C_CLIENT_INSMOD_2(thmc50, adm1022);
	I2C_CLIENT_MODULE_PARM(adm1022_temp3, "List of adapter,address pairs "
	"to enable 3rd temperature (ADM1022 only)");

	/* Many THMC50 constants specified below */

	/* The THMC50 registers */
	#define THMC50_REG_CONF 0x40
	#define THMC50_REG_COMPANY_ID 0x3E
	#define THMC50_REG_DIE_CODE 0x3F
	#define THMC50_REG_ANALOG_OUT 0x19
	/*
	* The mirror status register cannot be used as
	* reading it does not clear alarms.
	*/
	#define THMC50_REG_INTR 0x41

	static const u8 THMC50_REG_TEMP[] = { 0x27, 0x26, 0x20 };
	static const u8 THMC50_REG_TEMP_MIN[] = { 0x3A, 0x38, 0x2C };
	static const u8 THMC50_REG_TEMP_MAX[] = { 0x39, 0x37, 0x2B };
	static const u8 THMC50_REG_TEMP_CRITICAL[] = { 0x13, 0x14, 0x14 };
	static const u8 THMC50_REG_TEMP_DEFAULT[] = { 0x17, 0x18, 0x18 };

	#define THMC50_REG_CONF_nFANOFF 0x20
	#define THMC50_REG_CONF_PROGRAMMED 0x08

	/* Each client has this additional data */
	struct thmc50_data {
	struct device *hwmon_dev;

	struct mutex update_lock;
	enum chips type;
	unsigned long last_updated; /* In jiffies */
	char has_temp3; /* !=0 if it is ADM1022 in temp3 mode */
	char valid; /* !=0 if following fields are valid */

	/* Register values */
	s8 temp_input[3];
	s8 temp_max[3];
	s8 temp_min[3];
	s8 temp_critical[3];
	u8 analog_out;
	u8 alarms;
	};

	static int thmc50_detect(struct i2c_client *client, int kind,
	struct i2c_board_info *info);
	static int thmc50_probe(struct i2c_client *client,
	const struct i2c_device_id *id);
	static int thmc50_remove(struct i2c_client *client);
	static void thmc50_init_client(struct i2c_client *client);
	static struct thmc50_data thmc50_update_device(struct device dev);

	static const struct i2c_device_id thmc50_id[] = {
	{ "adm1022", adm1022 },
	{ "thmc50", thmc50 },
	{ }
	};
	MODULE_DEVICE_TABLE(i2c, thmc50_id);

	static struct i2c_driver thmc50_driver = {
	.class = I2C_CLASS_HWMON,
	.driver = {
	.name = "thmc50",
	},
	.probe = thmc50_probe,
	.remove = thmc50_remove,
	.id_table = thmc50_id,
	.detect = thmc50_detect,
	.address_data = &addr_data,
	};

	static ssize_t show_analog_out(struct device *dev,
	struct device_attribute attr, char buf)
	{
	struct thmc50_data *data = thmc50_update_device(dev);
	return sprintf(buf, "%d\n", data->analog_out);
	}

	static ssize_t set_analog_out(struct device *dev,
	struct device_attribute *attr,
	const char *buf, size_t count)
	{
	struct i2c_client *client = to_i2c_client(dev);
	struct thmc50_data *data = i2c_get_clientdata(client);
	int tmp = simple_strtoul(buf, NULL, 10);
	int config;

	mutex_lock(&data->update_lock);
	data->analog_out = SENSORS_LIMIT(tmp, 0, 255);
	i2c_smbus_write_byte_data(client, THMC50_REG_ANALOG_OUT,
	data->analog_out);

	config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
	if (data->analog_out == 0)
	config &= ~THMC50_REG_CONF_nFANOFF;
	else
	config \|= THMC50_REG_CONF_nFANOFF;
	i2c_smbus_write_byte_data(client, THMC50_REG_CONF, config);

	mutex_unlock(&data->update_lock);
	return count;
	}

	/* There is only one PWM mode = DC */
	static ssize_t show_pwm_mode(struct device dev, struct device_attribute attr,
	char *buf)
	{
	return sprintf(buf, "0\n");
	}

	/* Temperatures */
	static ssize_t show_temp(struct device dev, struct device_attribute attr,
	char *buf)
	{
	int nr = to_sensor_dev_attr(attr)->index;
	struct thmc50_data *data = thmc50_update_device(dev);
	return sprintf(buf, "%d\n", data->temp_input[nr] * 1000);
	}

	static ssize_t show_temp_min(struct device dev, struct device_attribute attr,
	char *buf)
	{
	int nr = to_sensor_dev_attr(attr)->index;
	struct thmc50_data *data = thmc50_update_device(dev);
	return sprintf(buf, "%d\n", data->temp_min[nr] * 1000);
	}

	static ssize_t set_temp_min(struct device dev, struct device_attribute attr,
	const char *buf, size_t count)
	{
	int nr = to_sensor_dev_attr(attr)->index;
	struct i2c_client *client = to_i2c_client(dev);
	struct thmc50_data *data = i2c_get_clientdata(client);
	int val = simple_strtol(buf, NULL, 10);

	mutex_lock(&data->update_lock);
	data->temp_min[nr] = SENSORS_LIMIT(val / 1000, -128, 127);
	i2c_smbus_write_byte_data(client, THMC50_REG_TEMP_MIN[nr],
	data->temp_min[nr]);
	mutex_unlock(&data->update_lock);
	return count;
	}

	static ssize_t show_temp_max(struct device dev, struct device_attribute attr,
	char *buf)
	{
	int nr = to_sensor_dev_attr(attr)->index;
	struct thmc50_data *data = thmc50_update_device(dev);
	return sprintf(buf, "%d\n", data->temp_max[nr] * 1000);
	}

	static ssize_t set_temp_max(struct device dev, struct device_attribute attr,
	const char *buf, size_t count)
	{
	int nr = to_sensor_dev_attr(attr)->index;
	struct i2c_client *client = to_i2c_client(dev);
	struct thmc50_data *data = i2c_get_clientdata(client);
	int val = simple_strtol(buf, NULL, 10);

	mutex_lock(&data->update_lock);
	data->temp_max[nr] = SENSORS_LIMIT(val / 1000, -128, 127);
	i2c_smbus_write_byte_data(client, THMC50_REG_TEMP_MAX[nr],
	data->temp_max[nr]);
	mutex_unlock(&data->update_lock);
	return count;
	}

	static ssize_t show_temp_critical(struct device *dev,
	struct device_attribute *attr,
	char *buf)
	{
	int nr = to_sensor_dev_attr(attr)->index;
	struct thmc50_data *data = thmc50_update_device(dev);
	return sprintf(buf, "%d\n", data->temp_critical[nr] * 1000);
	}

	static ssize_t show_alarm(struct device dev, struct device_attribute attr,
	char *buf)
	{
	int index = to_sensor_dev_attr(attr)->index;
	struct thmc50_data *data = thmc50_update_device(dev);

	return sprintf(buf, "%u\n", (data->alarms >> index) & 1);
	}

	#define temp_reg(offset) \
	static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp, \
	NULL, offset - 1); \
	static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO \| S_IWUSR, \
	show_temp_min, set_temp_min, offset - 1); \
	static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO \| S_IWUSR, \
	show_temp_max, set_temp_max, offset - 1); \
	static SENSOR_DEVICE_ATTR(temp##offset##_crit, S_IRUGO, \
	show_temp_critical, NULL, offset - 1);

	temp_reg(1);
	temp_reg(2);
	temp_reg(3);

	static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 0);
	static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5);
	static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 1);
	static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 7);
	static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 2);

	static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO \| S_IWUSR, show_analog_out,
	set_analog_out, 0);
	static SENSOR_DEVICE_ATTR(pwm1_mode, S_IRUGO, show_pwm_mode, NULL, 0);

	static struct attribute *thmc50_attributes[] = {
	&sensor_dev_attr_temp1_max.dev_attr.attr,
	&sensor_dev_attr_temp1_min.dev_attr.attr,
	&sensor_dev_attr_temp1_input.dev_attr.attr,
	&sensor_dev_attr_temp1_crit.dev_attr.attr,
	&sensor_dev_attr_temp1_alarm.dev_attr.attr,
	&sensor_dev_attr_temp2_max.dev_attr.attr,
	&sensor_dev_attr_temp2_min.dev_attr.attr,
	&sensor_dev_attr_temp2_input.dev_attr.attr,
	&sensor_dev_attr_temp2_crit.dev_attr.attr,
	&sensor_dev_attr_temp2_alarm.dev_attr.attr,
	&sensor_dev_attr_temp2_fault.dev_attr.attr,
	&sensor_dev_attr_pwm1.dev_attr.attr,
	&sensor_dev_attr_pwm1_mode.dev_attr.attr,
	NULL
	};

	static const struct attribute_group thmc50_group = {
	.attrs = thmc50_attributes,
	};

	/* for ADM1022 3rd temperature mode */
	static struct attribute *temp3_attributes[] = {
	&sensor_dev_attr_temp3_max.dev_attr.attr,
	&sensor_dev_attr_temp3_min.dev_attr.attr,
	&sensor_dev_attr_temp3_input.dev_attr.attr,
	&sensor_dev_attr_temp3_crit.dev_attr.attr,
	&sensor_dev_attr_temp3_alarm.dev_attr.attr,
	&sensor_dev_attr_temp3_fault.dev_attr.attr,
	NULL
	};

	static const struct attribute_group temp3_group = {
	.attrs = temp3_attributes,
	};

	/* Return 0 if detection is successful, -ENODEV otherwise */
	static int thmc50_detect(struct i2c_client *client, int kind,
	struct i2c_board_info *info)
	{
	unsigned company;
	unsigned revision;
	unsigned config;
	struct i2c_adapter *adapter = client->adapter;
	const char *type_name;

	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
	pr_debug("thmc50: detect failed, "
	"smbus byte data not supported!\n");
	return -ENODEV;
	}

	pr_debug("thmc50: Probing for THMC50 at 0x%2X on bus %d\n",
	client->addr, i2c_adapter_id(client->adapter));

	company = i2c_smbus_read_byte_data(client, THMC50_REG_COMPANY_ID);
	revision = i2c_smbus_read_byte_data(client, THMC50_REG_DIE_CODE);
	config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
	if (revision < 0xc0 \|\| (config & 0x10))
	return -ENODEV;

	if (company == 0x41) {
	int id = i2c_adapter_id(client->adapter);
	int i;

	type_name = "adm1022";
	for (i = 0; i + 1 < adm1022_temp3_num; i += 2)
	if (adm1022_temp3[i] == id &&
	adm1022_temp3[i + 1] == client->addr) {
	/* enable 2nd remote temp */
	config \|= (1 << 7);
	i2c_smbus_write_byte_data(client,
	THMC50_REG_CONF,
	config);
	break;
	}
	} else if (company == 0x49) {
	type_name = "thmc50";
	} else {
	pr_debug("thmc50: Detection of THMC50/ADM1022 failed\n");
	return -ENODEV;
	}

	pr_debug("thmc50: Detected %s (version %x, revision %x)\n",
	type_name, (revision >> 4) - 0xc, revision & 0xf);

	strlcpy(info->type, type_name, I2C_NAME_SIZE);

	return 0;
	}

	static int thmc50_probe(struct i2c_client *client,
	const struct i2c_device_id *id)
	{
	struct thmc50_data *data;
	int err;

	data = kzalloc(sizeof(struct thmc50_data), GFP_KERNEL);
	if (!data) {
	pr_debug("thmc50: detect failed, kzalloc failed!\n");
	err = -ENOMEM;
	goto exit;
	}

	i2c_set_clientdata(client, data);
	data->type = id->driver_data;
	mutex_init(&data->update_lock);

	thmc50_init_client(client);

	/* Register sysfs hooks */
	if ((err = sysfs_create_group(&client->dev.kobj, &thmc50_group)))
	goto exit_free;

	/* Register ADM1022 sysfs hooks */
	if (data->has_temp3)
	if ((err = sysfs_create_group(&client->dev.kobj,
	&temp3_group)))
	goto exit_remove_sysfs_thmc50;

	/* Register a new directory entry with module sensors */
	data->hwmon_dev = hwmon_device_register(&client->dev);
	if (IS_ERR(data->hwmon_dev)) {
	err = PTR_ERR(data->hwmon_dev);
	goto exit_remove_sysfs;
	}

	return 0;

	exit_remove_sysfs:
	if (data->has_temp3)
	sysfs_remove_group(&client->dev.kobj, &temp3_group);
	exit_remove_sysfs_thmc50:
	sysfs_remove_group(&client->dev.kobj, &thmc50_group);
	exit_free:
	kfree(data);
	exit:
	return err;
	}

	static int thmc50_remove(struct i2c_client *client)
	{
	struct thmc50_data *data = i2c_get_clientdata(client);

	hwmon_device_unregister(data->hwmon_dev);
	sysfs_remove_group(&client->dev.kobj, &thmc50_group);
	if (data->has_temp3)
	sysfs_remove_group(&client->dev.kobj, &temp3_group);

	kfree(data);

	return 0;
	}

	static void thmc50_init_client(struct i2c_client *client)
	{
	struct thmc50_data *data = i2c_get_clientdata(client);
	int config;

	data->analog_out = i2c_smbus_read_byte_data(client,
	THMC50_REG_ANALOG_OUT);
	/* set up to at least 1 */
	if (data->analog_out == 0) {
	data->analog_out = 1;
	i2c_smbus_write_byte_data(client, THMC50_REG_ANALOG_OUT,
	data->analog_out);
	}
	config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
	config \|= 0x1; /* start the chip if it is in standby mode */
	if (data->type == adm1022 && (config & (1 << 7)))
	data->has_temp3 = 1;
	i2c_smbus_write_byte_data(client, THMC50_REG_CONF, config);
	}

	static struct thmc50_data thmc50_update_device(struct device dev)
	{
	struct i2c_client *client = to_i2c_client(dev);
	struct thmc50_data *data = i2c_get_clientdata(client);
	int timeout = HZ / 5 + (data->type == thmc50 ? HZ : 0);

	mutex_lock(&data->update_lock);

	if (time_after(jiffies, data->last_updated + timeout)
	\|\| !data->valid) {

	int temps = data->has_temp3 ? 3 : 2;
	int i;
	int prog = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);

	prog &= THMC50_REG_CONF_PROGRAMMED;

	for (i = 0; i < temps; i++) {
	data->temp_input[i] = i2c_smbus_read_byte_data(client,
	THMC50_REG_TEMP[i]);
	data->temp_max[i] = i2c_smbus_read_byte_data(client,
	THMC50_REG_TEMP_MAX[i]);
	data->temp_min[i] = i2c_smbus_read_byte_data(client,
	THMC50_REG_TEMP_MIN[i]);
	data->temp_critical[i] =
	i2c_smbus_read_byte_data(client,
	prog ? THMC50_REG_TEMP_CRITICAL[i]
	: THMC50_REG_TEMP_DEFAULT[i]);
	}
	data->analog_out =
	i2c_smbus_read_byte_data(client, THMC50_REG_ANALOG_OUT);
	data->alarms =
	i2c_smbus_read_byte_data(client, THMC50_REG_INTR);
	data->last_updated = jiffies;
	data->valid = 1;
	}

	mutex_unlock(&data->update_lock);

	return data;
	}

	static int __init sm_thmc50_init(void)
	{
	return i2c_add_driver(&thmc50_driver);
	}

	static void __exit sm_thmc50_exit(void)
	{
	i2c_del_driver(&thmc50_driver);
	}

	MODULE_AUTHOR("Krzysztof Helt <krzysztof.h1@wp.pl>");
	MODULE_DESCRIPTION("THMC50 driver");

	module_init(sm_thmc50_init);
	module_exit(sm_thmc50_exit);