Merge branch 'quilt/jdelvare-hwmon'

6 files changed, 1343 insertions, 261 deletions

diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index 68cf87749a42..77d032fb813d 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -170,6 +170,16 @@ config SENSORS_ADM9240
 	  This driver can also be built as a module.  If so, the module
 	  will be called adm9240.
 
+config SENSORS_ADT7411
+	tristate "Analog Devices ADT7411"
+	depends on I2C && EXPERIMENTAL
+	help
+	  If you say yes here you get support for the Analog Devices
+	  ADT7411 voltage and temperature monitoring chip.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called adt7411.
+
 config SENSORS_ADT7462
 	tristate "Analog Devices ADT7462"
 	depends on I2C && EXPERIMENTAL
@@ -563,9 +573,10 @@ config SENSORS_LM90
 	depends on I2C
 	help
 	  If you say yes here you get support for National Semiconductor LM90,
-	  LM86, LM89 and LM99, Analog Devices ADM1032 and ADT7461, and Maxim
+	  LM86, LM89 and LM99, Analog Devices ADM1032 and ADT7461, Maxim
 	  MAX6646, MAX6647, MAX6648, MAX6649, MAX6657, MAX6658, MAX6659,
-	  MAX6680, MAX6681 and MAX6692 sensor chips.
+	  MAX6680, MAX6681 and MAX6692, and Winbond/Nuvoton W83L771AWG/ASG
+	  sensor chips.
 
 	  This driver can also be built as a module.  If so, the module
 	  will be called lm90.
@@ -909,7 +920,8 @@ config SENSORS_W83793
 	select HWMON_VID
 	help
 	  If you say yes here you get support for the Winbond W83793
-	  hardware monitoring chip.
+	  hardware monitoring chip, including support for the integrated
+	  watchdog.
 
 	  This driver can also be built as a module.  If so, the module
 	  will be called w83793.
diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
index 4bc215c0953f..5fe67bf961b3 100644
--- a/drivers/hwmon/Makefile
+++ b/drivers/hwmon/Makefile
@@ -29,6 +29,7 @@ obj-$(CONFIG_SENSORS_ADM1029)	+= adm1029.o
 obj-$(CONFIG_SENSORS_ADM1031)	+= adm1031.o
 obj-$(CONFIG_SENSORS_ADM9240)	+= adm9240.o
 obj-$(CONFIG_SENSORS_ADS7828)	+= ads7828.o
+obj-$(CONFIG_SENSORS_ADT7411)	+= adt7411.o
 obj-$(CONFIG_SENSORS_ADT7462)	+= adt7462.o
 obj-$(CONFIG_SENSORS_ADT7470)	+= adt7470.o
 obj-$(CONFIG_SENSORS_ADT7473)	+= adt7473.o
diff --git a/drivers/hwmon/adt7411.c b/drivers/hwmon/adt7411.c
new file mode 100644
index 000000000000..9e9246fe2245
--- /dev/null
+++ b/drivers/hwmon/adt7411.c
@@ -0,0 +1,359 @@
+/*
+ *  Driver for the ADT7411 (I2C/SPI 8 channel 10 bit ADC & temperature-sensor)
+ *
+ *  Copyright (C) 2008, 2010 Pengutronix
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 as
+ *  published by the Free Software Foundation.
+ *
+ *  TODO: SPI, support for external temperature sensor
+ * 	  use power-down mode for suspend?, interrupt handling?
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/delay.h>
+#include <linux/mutex.h>
+#include <linux/jiffies.h>
+#include <linux/i2c.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+
+#define ADT7411_REG_INT_TEMP_VDD_LSB		0x03
+#define ADT7411_REG_EXT_TEMP_AIN14_LSB		0x04
+#define ADT7411_REG_VDD_MSB			0x06
+#define ADT7411_REG_INT_TEMP_MSB		0x07
+#define ADT7411_REG_EXT_TEMP_AIN1_MSB		0x08
+
+#define ADT7411_REG_CFG1			0x18
+#define ADT7411_CFG1_START_MONITOR		(1 << 0)
+
+#define ADT7411_REG_CFG2			0x19
+#define ADT7411_CFG2_DISABLE_AVG		(1 << 5)
+
+#define ADT7411_REG_CFG3			0x1a
+#define ADT7411_CFG3_ADC_CLK_225		(1 << 0)
+#define ADT7411_CFG3_REF_VDD			(1 << 4)
+
+#define ADT7411_REG_DEVICE_ID			0x4d
+#define ADT7411_REG_MANUFACTURER_ID		0x4e
+
+#define ADT7411_DEVICE_ID			0x2
+#define ADT7411_MANUFACTURER_ID			0x41
+
+static const unsigned short normal_i2c[] = { 0x48, 0x4a, 0x4b, I2C_CLIENT_END };
+
+struct adt7411_data {
+	struct mutex device_lock;	/* for "atomic" device accesses */
+	unsigned long next_update;
+	int vref_cached;
+	bool ref_is_vdd;
+	struct device *hwmon_dev;
+};
+
+/*
+ * When reading a register containing (up to 4) lsb, all associated
+ * msb-registers get locked by the hardware. After _one_ of those msb is read,
+ * _all_ are unlocked. In order to use this locking correctly, reading lsb/msb
+ * is protected here with a mutex, too.
+ */
+static int adt7411_read_10_bit(struct i2c_client *client, u8 lsb_reg,
+				u8 msb_reg, u8 lsb_shift)
+{
+	struct adt7411_data *data = i2c_get_clientdata(client);
+	int val, tmp;
+
+	mutex_lock(&data->device_lock);
+
+	val = i2c_smbus_read_byte_data(client, lsb_reg);
+	if (val < 0)
+		goto exit_unlock;
+
+	tmp = (val >> lsb_shift) & 3;
+	val = i2c_smbus_read_byte_data(client, msb_reg);
+
+	if (val >= 0)
+		val = (val << 2) | tmp;
+
+ exit_unlock:
+	mutex_unlock(&data->device_lock);
+
+	return val;
+}
+
+static int adt7411_modify_bit(struct i2c_client *client, u8 reg, u8 bit,
+				bool flag)
+{
+	struct adt7411_data *data = i2c_get_clientdata(client);
+	int ret, val;
+
+	mutex_lock(&data->device_lock);
+
+	ret = i2c_smbus_read_byte_data(client, reg);
+	if (ret < 0)
+		goto exit_unlock;
+
+	if (flag)
+		val = ret | bit;
+	else
+		val = ret & ~bit;
+
+	ret = i2c_smbus_write_byte_data(client, reg, val);
+
+ exit_unlock:
+	mutex_unlock(&data->device_lock);
+	return ret;
+}
+
+static ssize_t adt7411_show_vdd(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	int ret = adt7411_read_10_bit(client, ADT7411_REG_INT_TEMP_VDD_LSB,
+			ADT7411_REG_VDD_MSB, 2);
+
+	return ret < 0 ? ret : sprintf(buf, "%u\n", ret * 7000 / 1024);
+}
+
+static ssize_t adt7411_show_temp(struct device *dev,
+			struct device_attribute *attr, char *buf)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	int val = adt7411_read_10_bit(client, ADT7411_REG_INT_TEMP_VDD_LSB,
+			ADT7411_REG_INT_TEMP_MSB, 0);
+
+	if (val < 0)
+		return val;
+
+	val = val & 0x200 ? val - 0x400 : val; /* 10 bit signed */
+
+	return sprintf(buf, "%d\n", val * 250);
+}
+
+static ssize_t adt7411_show_input(struct device *dev,
+				  struct device_attribute *attr, char *buf)
+{
+	int nr = to_sensor_dev_attr(attr)->index;
+	struct i2c_client *client = to_i2c_client(dev);
+	struct adt7411_data *data = i2c_get_clientdata(client);
+	int val;
+	u8 lsb_reg, lsb_shift;
+
+	if (time_after_eq(jiffies, data->next_update)) {
+		val = i2c_smbus_read_byte_data(client, ADT7411_REG_CFG3);
+		if (val < 0)
+			return val;
+		data->ref_is_vdd = val & ADT7411_CFG3_REF_VDD;
+
+		if (data->ref_is_vdd) {
+			val = adt7411_read_10_bit(client,
+					ADT7411_REG_INT_TEMP_VDD_LSB,
+					ADT7411_REG_VDD_MSB, 2);
+			if (val < 0)
+				return val;
+
+			data->vref_cached = val * 7000 / 1024;
+		} else {
+			data->vref_cached = 2250;
+		}
+
+		data->next_update = jiffies + HZ;
+	}
+
+	lsb_reg = ADT7411_REG_EXT_TEMP_AIN14_LSB + (nr >> 2);
+	lsb_shift = 2 * (nr & 0x03);
+	val = adt7411_read_10_bit(client, lsb_reg,
+			ADT7411_REG_EXT_TEMP_AIN1_MSB + nr, lsb_shift);
+
+	return val < 0 ? val :
+			sprintf(buf, "%u\n", val * data->vref_cached / 1024);
+}
+
+static ssize_t adt7411_show_bit(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	struct sensor_device_attribute_2 *attr2 = to_sensor_dev_attr_2(attr);
+	struct i2c_client *client = to_i2c_client(dev);
+	int ret = i2c_smbus_read_byte_data(client, attr2->index);
+
+	return ret < 0 ? ret : sprintf(buf, "%u\n", !!(ret & attr2->nr));
+}
+
+static ssize_t adt7411_set_bit(struct device *dev,
+			       struct device_attribute *attr, const char *buf,
+			       size_t count)
+{
+	struct sensor_device_attribute_2 *s_attr2 = to_sensor_dev_attr_2(attr);
+	struct i2c_client *client = to_i2c_client(dev);
+	struct adt7411_data *data = i2c_get_clientdata(client);
+	int ret;
+	unsigned long flag;
+
+	ret = strict_strtoul(buf, 0, &flag);
+	if (ret || flag > 1)
+		return -EINVAL;
+
+	ret = adt7411_modify_bit(client, s_attr2->index, s_attr2->nr, flag);
+
+	/* force update */
+	data->next_update = jiffies;
+
+	return ret < 0 ? ret : count;
+}
+
+#define ADT7411_BIT_ATTR(__name, __reg, __bit) \
+	SENSOR_DEVICE_ATTR_2(__name, S_IRUGO | S_IWUSR, adt7411_show_bit, \
+	adt7411_set_bit, __bit, __reg)
+
+static DEVICE_ATTR(temp1_input, S_IRUGO, adt7411_show_temp, NULL);
+static DEVICE_ATTR(in0_input, S_IRUGO, adt7411_show_vdd, NULL);
+static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, adt7411_show_input, NULL, 0);
+static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, adt7411_show_input, NULL, 1);
+static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, adt7411_show_input, NULL, 2);
+static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, adt7411_show_input, NULL, 3);
+static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, adt7411_show_input, NULL, 4);
+static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, adt7411_show_input, NULL, 5);
+static SENSOR_DEVICE_ATTR(in7_input, S_IRUGO, adt7411_show_input, NULL, 6);
+static SENSOR_DEVICE_ATTR(in8_input, S_IRUGO, adt7411_show_input, NULL, 7);
+static ADT7411_BIT_ATTR(no_average, ADT7411_REG_CFG2, ADT7411_CFG2_DISABLE_AVG);
+static ADT7411_BIT_ATTR(fast_sampling, ADT7411_REG_CFG3, ADT7411_CFG3_ADC_CLK_225);
+static ADT7411_BIT_ATTR(adc_ref_vdd, ADT7411_REG_CFG3, ADT7411_CFG3_REF_VDD);
+
+static struct attribute *adt7411_attrs[] = {
+	&dev_attr_temp1_input.attr,
+	&dev_attr_in0_input.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,
+	&sensor_dev_attr_in5_input.dev_attr.attr,
+	&sensor_dev_attr_in6_input.dev_attr.attr,
+	&sensor_dev_attr_in7_input.dev_attr.attr,
+	&sensor_dev_attr_in8_input.dev_attr.attr,
+	&sensor_dev_attr_no_average.dev_attr.attr,
+	&sensor_dev_attr_fast_sampling.dev_attr.attr,
+	&sensor_dev_attr_adc_ref_vdd.dev_attr.attr,
+	NULL
+};
+
+static const struct attribute_group adt7411_attr_grp = {
+	.attrs = adt7411_attrs,
+};
+
+static int adt7411_detect(struct i2c_client *client,
+			  struct i2c_board_info *info)
+{
+	int val;
+
+	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+		return -ENODEV;
+
+	val = i2c_smbus_read_byte_data(client, ADT7411_REG_MANUFACTURER_ID);
+	if (val < 0 || val != ADT7411_MANUFACTURER_ID) {
+		dev_dbg(&client->dev, "Wrong manufacturer ID. Got %d, "
+			"expected %d\n", val, ADT7411_MANUFACTURER_ID);
+		return -ENODEV;
+	}
+
+	val = i2c_smbus_read_byte_data(client, ADT7411_REG_DEVICE_ID);
+	if (val < 0 || val != ADT7411_DEVICE_ID) {
+		dev_dbg(&client->dev, "Wrong device ID. Got %d, "
+			"expected %d\n", val, ADT7411_DEVICE_ID);
+		return -ENODEV;
+	}
+
+	strlcpy(info->type, "adt7411", I2C_NAME_SIZE);
+
+	return 0;
+}
+
+static int __devinit adt7411_probe(struct i2c_client *client,
+				   const struct i2c_device_id *id)
+{
+	struct adt7411_data *data;
+	int ret;
+
+	data = kzalloc(sizeof(*data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	i2c_set_clientdata(client, data);
+	mutex_init(&data->device_lock);
+
+	ret = adt7411_modify_bit(client, ADT7411_REG_CFG1,
+				 ADT7411_CFG1_START_MONITOR, 1);
+	if (ret < 0)
+		goto exit_free;
+
+	/* force update on first occasion */
+	data->next_update = jiffies;
+
+	ret = sysfs_create_group(&client->dev.kobj, &adt7411_attr_grp);
+	if (ret)
+		goto exit_free;
+
+	data->hwmon_dev = hwmon_device_register(&client->dev);
+	if (IS_ERR(data->hwmon_dev)) {
+		ret = PTR_ERR(data->hwmon_dev);
+		goto exit_remove;
+	}
+
+	dev_info(&client->dev, "successfully registered\n");
+
+	return 0;
+
+ exit_remove:
+	sysfs_remove_group(&client->dev.kobj, &adt7411_attr_grp);
+ exit_free:
+	i2c_set_clientdata(client, NULL);
+	kfree(data);
+	return ret;
+}
+
+static int __devexit adt7411_remove(struct i2c_client *client)
+{
+	struct adt7411_data *data = i2c_get_clientdata(client);
+
+	hwmon_device_unregister(data->hwmon_dev);
+	sysfs_remove_group(&client->dev.kobj, &adt7411_attr_grp);
+	i2c_set_clientdata(client, NULL);
+	kfree(data);
+	return 0;
+}
+
+static const struct i2c_device_id adt7411_id[] = {
+	{ "adt7411", 0 },
+	{ }
+};
+
+static struct i2c_driver adt7411_driver = {
+	.driver		= {
+		.name		= "adt7411",
+	},
+	.probe  = adt7411_probe,
+	.remove	= __devexit_p(adt7411_remove),
+	.id_table = adt7411_id,
+	.detect = adt7411_detect,
+	.address_list = normal_i2c,
+	.class = I2C_CLASS_HWMON,
+};
+
+static int __init sensors_adt7411_init(void)
+{
+	return i2c_add_driver(&adt7411_driver);
+}
+module_init(sensors_adt7411_init)
+
+static void __exit sensors_adt7411_exit(void)
+{
+	i2c_del_driver(&adt7411_driver);
+}
+module_exit(sensors_adt7411_exit)
+
+MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de> and "
+	"Wolfram Sang <w.sang@pengutronix.de>");
+MODULE_DESCRIPTION("ADT7411 driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/hwmon/it87.c b/drivers/hwmon/it87.c
index 0ffe84d190bb..84af46522406 100644
--- a/drivers/hwmon/it87.c
+++ b/drivers/hwmon/it87.c
@@ -1,40 +1,40 @@
 /*
-    it87.c - Part of lm_sensors, Linux kernel modules for hardware
-             monitoring.
-
-    The IT8705F is an LPC-based Super I/O part that contains UARTs, a
-    parallel port, an IR port, a MIDI port, a floppy controller, etc., in
-    addition to an Environment Controller (Enhanced Hardware Monitor and
-    Fan Controller)
-
-    This driver supports only the Environment Controller in the IT8705F and
-    similar parts.  The other devices are supported by different drivers.
-
-    Supports: IT8705F  Super I/O chip w/LPC interface
-              IT8712F  Super I/O chip w/LPC interface
-              IT8716F  Super I/O chip w/LPC interface
-              IT8718F  Super I/O chip w/LPC interface
-              IT8720F  Super I/O chip w/LPC interface
-              IT8726F  Super I/O chip w/LPC interface
-              Sis950   A clone of the IT8705F
-
-    Copyright (C) 2001 Chris Gauthron
-    Copyright (C) 2005-2007 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.
-*/
+ *  it87.c - Part of lm_sensors, Linux kernel modules for hardware
+ *           monitoring.
+ *
+ *  The IT8705F is an LPC-based Super I/O part that contains UARTs, a
+ *  parallel port, an IR port, a MIDI port, a floppy controller, etc., in
+ *  addition to an Environment Controller (Enhanced Hardware Monitor and
+ *  Fan Controller)
+ *
+ *  This driver supports only the Environment Controller in the IT8705F and
+ *  similar parts.  The other devices are supported by different drivers.
+ *
+ *  Supports: IT8705F  Super I/O chip w/LPC interface
+ *            IT8712F  Super I/O chip w/LPC interface
+ *            IT8716F  Super I/O chip w/LPC interface
+ *            IT8718F  Super I/O chip w/LPC interface
+ *            IT8720F  Super I/O chip w/LPC interface
+ *            IT8726F  Super I/O chip w/LPC interface
+ *            Sis950   A clone of the IT8705F
+ *
+ *  Copyright (C) 2001 Chris Gauthron
+ *  Copyright (C) 2005-2010 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>
@@ -128,6 +128,7 @@ superio_exit(void)
 #define IT87_SIO_GPIO5_REG	0x29
 #define IT87_SIO_PINX2_REG	0x2c	/* Pin selection */
 #define IT87_SIO_VID_REG	0xfc	/* VID value */
+#define IT87_SIO_BEEP_PIN_REG	0xf6	/* Beep pin mapping */
 
 /* Update battery voltage after every reading if true */
 static int update_vbat;
@@ -187,6 +188,7 @@ static const u8 IT87_REG_FANX_MIN[]	= { 0x1b, 0x1c, 0x1d, 0x85, 0x87 };
 
 #define IT87_REG_VIN_ENABLE    0x50
 #define IT87_REG_TEMP_ENABLE   0x51
+#define IT87_REG_BEEP_ENABLE   0x5c
 
 #define IT87_REG_CHIPID        0x58
 
@@ -246,6 +248,7 @@ struct it87_sio_data {
 	/* Values read from Super-I/O config space */
 	u8 revision;
 	u8 vid_value;
+	u8 beep_pin;
 	/* Features skipped based on config or DMI */
 	u8 skip_vid;
 	u8 skip_fan;
@@ -279,9 +282,17 @@ struct it87_data {
 	u8 vid;			/* Register encoding, combined */
 	u8 vrm;
 	u32 alarms;		/* Register encoding, combined */
+	u8 beeps;		/* Register encoding */
 	u8 fan_main_ctrl;	/* Register value */
 	u8 fan_ctl;		/* Register value */
-	u8 manual_pwm_ctl[3];   /* manual PWM value set by user */
+
+	/* The following 3 arrays correspond to the same registers. The
+	 * meaning of bits 6-0 depends on the value of bit 7, and we want
+	 * to preserve settings on mode changes, so we have to track all
+	 * values separately. */
+	u8 pwm_ctrl[3];		/* Register value */
+	u8 pwm_duty[3];		/* Manual PWM value set by user (bit 6-0) */
+	u8 pwm_temp_map[3];	/* PWM to temp. chan. mapping (bits 1-0) */
 };
 
 static inline int has_16bit_fans(const struct it87_data *data)
@@ -352,7 +363,10 @@ static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
 	int nr = sensor_attr->index;
 
 	struct it87_data *data = dev_get_drvdata(dev);
-	unsigned long val = simple_strtoul(buf, NULL, 10);
+	unsigned long val;
+
+	if (strict_strtoul(buf, 10, &val) < 0)
+		return -EINVAL;
 
 	mutex_lock(&data->update_lock);
 	data->in_min[nr] = IN_TO_REG(val);
@@ -368,7 +382,10 @@ static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
 	int nr = sensor_attr->index;
 
 	struct it87_data *data = dev_get_drvdata(dev);
-	unsigned long val = simple_strtoul(buf, NULL, 10);
+	unsigned long val;
+
+	if (strict_strtoul(buf, 10, &val) < 0)
+		return -EINVAL;
 
 	mutex_lock(&data->update_lock);
 	data->in_max[nr] = IN_TO_REG(val);
@@ -441,7 +458,10 @@ static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
 	int nr = sensor_attr->index;
 
 	struct it87_data *data = dev_get_drvdata(dev);
-	int val = simple_strtol(buf, NULL, 10);
+	long val;
+
+	if (strict_strtol(buf, 10, &val) < 0)
+		return -EINVAL;
 
 	mutex_lock(&data->update_lock);
 	data->temp_high[nr] = TEMP_TO_REG(val);
@@ -456,7 +476,10 @@ static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
 	int nr = sensor_attr->index;
 
 	struct it87_data *data = dev_get_drvdata(dev);
-	int val = simple_strtol(buf, NULL, 10);
+	long val;
+
+	if (strict_strtol(buf, 10, &val) < 0)
+		return -EINVAL;
 
 	mutex_lock(&data->update_lock);
 	data->temp_low[nr] = TEMP_TO_REG(val);
@@ -483,8 +506,9 @@ static ssize_t show_sensor(struct device *dev, struct device_attribute *attr,
 	int nr = sensor_attr->index;
 
 	struct it87_data *data = it87_update_device(dev);
-	u8 reg = data->sensor; /* In case the value is updated while we use it */
-	
+	u8 reg = data->sensor;		/* In case the value is updated while
+					   we use it */
+
 	if (reg & (1 << nr))
 		return sprintf(buf, "3\n");  /* thermal diode */
 	if (reg & (8 << nr))
@@ -498,7 +522,10 @@ static ssize_t set_sensor(struct device *dev, struct device_attribute *attr,
 	int nr = sensor_attr->index;
 
 	struct it87_data *data = dev_get_drvdata(dev);
-	int val = simple_strtol(buf, NULL, 10);
+	long val;
+
+	if (strict_strtol(buf, 10, &val) < 0)
+		return -EINVAL;
 
 	mutex_lock(&data->update_lock);
 
@@ -511,9 +538,9 @@ static ssize_t set_sensor(struct device *dev, struct device_attribute *attr,
 	}
 	/* 3 = thermal diode; 4 = thermistor; 0 = disabled */
 	if (val == 3)
-	    data->sensor |= 1 << nr;
+		data->sensor |= 1 << nr;
 	else if (val == 4)
-	    data->sensor |= 8 << nr;
+		data->sensor |= 8 << nr;
 	else if (val != 0) {
 		mutex_unlock(&data->update_lock);
 		return -EINVAL;
@@ -531,6 +558,19 @@ show_sensor_offset(2);
 show_sensor_offset(3);
 
 /* 3 Fans */
+
+static int pwm_mode(const struct it87_data *data, int nr)
+{
+	int ctrl = data->fan_main_ctrl & (1 << nr);
+
+	if (ctrl == 0)					/* Full speed */
+		return 0;
+	if (data->pwm_ctrl[nr] & 0x80)			/* Automatic mode */
+		return 2;
+	else						/* Manual mode */
+		return 1;
+}
+
 static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
 		char *buf)
 {
@@ -538,7 +578,7 @@ static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
 	int nr = sensor_attr->index;
 
 	struct it87_data *data = it87_update_device(dev);
-	return sprintf(buf,"%d\n", FAN_FROM_REG(data->fan[nr], 
+	return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
 				DIV_FROM_REG(data->fan_div[nr])));
 }
 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
@@ -548,8 +588,8 @@ static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
 	int nr = sensor_attr->index;
 
 	struct it87_data *data = it87_update_device(dev);
-	return sprintf(buf,"%d\n",
-		FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])));
+	return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
+				DIV_FROM_REG(data->fan_div[nr])));
 }
 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
 		char *buf)
@@ -560,14 +600,14 @@ static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
 	struct it87_data *data = it87_update_device(dev);
 	return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
 }
-static ssize_t show_pwm_enable(struct device *dev, struct device_attribute *attr,
-		char *buf)
+static ssize_t show_pwm_enable(struct device *dev,
+		struct device_attribute *attr, char *buf)
 {
 	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 	int nr = sensor_attr->index;
 
 	struct it87_data *data = it87_update_device(dev);
-	return sprintf(buf,"%d\n", (data->fan_main_ctrl & (1 << nr)) ? 1 : 0);
+	return sprintf(buf, "%d\n", pwm_mode(data, nr));
 }
 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
 		char *buf)
@@ -576,7 +616,7 @@ static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
 	int nr = sensor_attr->index;
 
 	struct it87_data *data = it87_update_device(dev);
-	return sprintf(buf,"%d\n", data->manual_pwm_ctl[nr]);
+	return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm_duty[nr]));
 }
 static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr,
 		char *buf)
@@ -593,15 +633,24 @@ static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
 	int nr = sensor_attr->index;
 
 	struct it87_data *data = dev_get_drvdata(dev);
-	int val = simple_strtol(buf, NULL, 10);
+	long val;
 	u8 reg;
 
+	if (strict_strtol(buf, 10, &val) < 0)
+		return -EINVAL;
+
 	mutex_lock(&data->update_lock);
 	reg = it87_read_value(data, IT87_REG_FAN_DIV);
 	switch (nr) {
-	case 0: data->fan_div[nr] = reg & 0x07; break;
-	case 1: data->fan_div[nr] = (reg >> 3) & 0x07; break;
-	case 2: data->fan_div[nr] = (reg & 0x40) ? 3 : 1; break;
+	case 0:
+		data->fan_div[nr] = reg & 0x07;
+		break;
+	case 1:
+		data->fan_div[nr] = (reg >> 3) & 0x07;
+		break;
+	case 2:
+		data->fan_div[nr] = (reg & 0x40) ? 3 : 1;
+		break;
 	}
 
 	data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
@@ -616,10 +665,13 @@ static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
 	int nr = sensor_attr->index;
 
 	struct it87_data *data = dev_get_drvdata(dev);
-	unsigned long val = simple_strtoul(buf, NULL, 10);
+	unsigned long val;
 	int min;
 	u8 old;
 
+	if (strict_strtoul(buf, 10, &val) < 0)
+		return -EINVAL;
+
 	mutex_lock(&data->update_lock);
 	old = it87_read_value(data, IT87_REG_FAN_DIV);
 
@@ -658,7 +710,10 @@ static ssize_t set_pwm_enable(struct device *dev,
 	int nr = sensor_attr->index;
 
 	struct it87_data *data = dev_get_drvdata(dev);
-	int val = simple_strtol(buf, NULL, 10);
+	long val;
+
+	if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 2)
+		return -EINVAL;
 
 	mutex_lock(&data->update_lock);
 
@@ -669,16 +724,18 @@ static ssize_t set_pwm_enable(struct device *dev,
 		it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr));
 		/* set on/off mode */
 		data->fan_main_ctrl &= ~(1 << nr);
-		it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl);
-	} else if (val == 1) {
+		it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
+				 data->fan_main_ctrl);
+	} else {
+		if (val == 1)				/* Manual mode */
+			data->pwm_ctrl[nr] = data->pwm_duty[nr];
+		else					/* Automatic mode */
+			data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
+		it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
 		/* set SmartGuardian mode */
 		data->fan_main_ctrl |= (1 << nr);
-		it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl);
-		/* set saved pwm value, clear FAN_CTLX PWM mode bit */
-		it87_write_value(data, IT87_REG_PWM(nr), PWM_TO_REG(data->manual_pwm_ctl[nr]));
-	} else {
-		mutex_unlock(&data->update_lock);
-		return -EINVAL;
+		it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
+				 data->fan_main_ctrl);
 	}
 
 	mutex_unlock(&data->update_lock);
@@ -691,15 +748,19 @@ static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
 	int nr = sensor_attr->index;
 
 	struct it87_data *data = dev_get_drvdata(dev);
-	int val = simple_strtol(buf, NULL, 10);
+	long val;
 
-	if (val < 0 || val > 255)
+	if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 255)
 		return -EINVAL;
 
 	mutex_lock(&data->update_lock);
-	data->manual_pwm_ctl[nr] = val;
-	if (data->fan_main_ctrl & (1 << nr))
-		it87_write_value(data, IT87_REG_PWM(nr), PWM_TO_REG(data->manual_pwm_ctl[nr]));
+	data->pwm_duty[nr] = PWM_TO_REG(val);
+	/* If we are in manual mode, write the duty cycle immediately;
+	 * otherwise, just store it for later use. */
+	if (!(data->pwm_ctrl[nr] & 0x80)) {
+		data->pwm_ctrl[nr] = data->pwm_duty[nr];
+		it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
+	}
 	mutex_unlock(&data->update_lock);
 	return count;
 }
@@ -707,9 +768,12 @@ static ssize_t set_pwm_freq(struct device *dev,
 		struct device_attribute *attr, const char *buf, size_t count)
 {
 	struct it87_data *data = dev_get_drvdata(dev);
-	unsigned long val = simple_strtoul(buf, NULL, 10);
+	unsigned long val;
 	int i;
 
+	if (strict_strtoul(buf, 10, &val) < 0)
+		return -EINVAL;
+
 	/* Search for the nearest available frequency */
 	for (i = 0; i < 7; i++) {
 		if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2)
@@ -724,6 +788,59 @@ static ssize_t set_pwm_freq(struct device *dev,
 
 	return count;
 }
+static ssize_t show_pwm_temp_map(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
+	int nr = sensor_attr->index;
+
+	struct it87_data *data = it87_update_device(dev);
+	int map;
+
+	if (data->pwm_temp_map[nr] < 3)
+		map = 1 << data->pwm_temp_map[nr];
+	else
+		map = 0;			/* Should never happen */
+	return sprintf(buf, "%d\n", map);
+}
+static ssize_t set_pwm_temp_map(struct device *dev,
+		struct device_attribute *attr, const char *buf, size_t count)
+{
+	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
+	int nr = sensor_attr->index;
+
+	struct it87_data *data = dev_get_drvdata(dev);
+	long val;
+	u8 reg;
+
+	if (strict_strtol(buf, 10, &val) < 0)
+		return -EINVAL;
+
+	switch (val) {
+	case (1 << 0):
+		reg = 0x00;
+		break;
+	case (1 << 1):
+		reg = 0x01;
+		break;
+	case (1 << 2):
+		reg = 0x02;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	mutex_lock(&data->update_lock);
+	data->pwm_temp_map[nr] = reg;
+	/* If we are in automatic mode, write the temp mapping immediately;
+	 * otherwise, just store it for later use. */
+	if (data->pwm_ctrl[nr] & 0x80) {
+		data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
+		it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
+	}
+	mutex_unlock(&data->update_lock);
+	return count;
+}
 
 #define show_fan_offset(offset)					\
 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO,		\
@@ -744,7 +861,10 @@ static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR,		\
 		show_pwm, set_pwm, offset - 1);				\
 static DEVICE_ATTR(pwm##offset##_freq,					\
 		(offset == 1 ? S_IRUGO | S_IWUSR : S_IRUGO),		\
-		show_pwm_freq, (offset == 1 ? set_pwm_freq : NULL));
+		show_pwm_freq, (offset == 1 ? set_pwm_freq : NULL));	\
+static SENSOR_DEVICE_ATTR(pwm##offset##_auto_channels_temp,		\
+		S_IRUGO, show_pwm_temp_map, set_pwm_temp_map,		\
+		offset - 1);
 
 show_pwm_offset(1);
 show_pwm_offset(2);
@@ -775,7 +895,10 @@ static ssize_t set_fan16_min(struct device *dev, struct device_attribute *attr,
 	struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 	int nr = sensor_attr->index;
 	struct it87_data *data = dev_get_drvdata(dev);
-	int val = simple_strtol(buf, NULL, 10);
+	long val;
+
+	if (strict_strtol(buf, 10, &val) < 0)
+		return -EINVAL;
 
 	mutex_lock(&data->update_lock);
 	data->fan_min[nr] = FAN16_TO_REG(val);
@@ -805,7 +928,8 @@ show_fan16_offset(4);
 show_fan16_offset(5);
 
 /* Alarms */
-static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
+static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
+		char *buf)
 {
 	struct it87_data *data = it87_update_device(dev);
 	return sprintf(buf, "%u\n", data->alarms);
@@ -836,27 +960,78 @@ static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16);
 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17);
 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18);
 
-static ssize_t
-show_vrm_reg(struct device *dev, struct device_attribute *attr, char *buf)
+static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
+		char *buf)
+{
+	int bitnr = to_sensor_dev_attr(attr)->index;
+	struct it87_data *data = it87_update_device(dev);
+	return sprintf(buf, "%u\n", (data->beeps >> bitnr) & 1);
+}
+static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
+		const char *buf, size_t count)
+{
+	int bitnr = to_sensor_dev_attr(attr)->index;
+	struct it87_data *data = dev_get_drvdata(dev);
+	long val;
+
+	if (strict_strtol(buf, 10, &val) < 0
+	 || (val != 0 && val != 1))
+		return -EINVAL;
+
+	mutex_lock(&data->update_lock);
+	data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
+	if (val)
+		data->beeps |= (1 << bitnr);
+	else
+		data->beeps &= ~(1 << bitnr);
+	it87_write_value(data, IT87_REG_BEEP_ENABLE, data->beeps);
+	mutex_unlock(&data->update_lock);
+	return count;
+}
+
+static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR,
+			  show_beep, set_beep, 1);
+static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO, show_beep, NULL, 1);
+static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO, show_beep, NULL, 1);
+static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO, show_beep, NULL, 1);
+static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO, show_beep, NULL, 1);
+static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO, show_beep, NULL, 1);
+static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO, show_beep, NULL, 1);
+static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO, show_beep, NULL, 1);
+/* fanX_beep writability is set later */
+static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO, show_beep, set_beep, 0);
+static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO, show_beep, set_beep, 0);
+static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO, show_beep, set_beep, 0);
+static SENSOR_DEVICE_ATTR(fan4_beep, S_IRUGO, show_beep, set_beep, 0);
+static SENSOR_DEVICE_ATTR(fan5_beep, S_IRUGO, show_beep, set_beep, 0);
+static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR,
+			  show_beep, set_beep, 2);
+static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO, show_beep, NULL, 2);
+static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO, show_beep, NULL, 2);
+
+static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr,
+		char *buf)
 {
 	struct it87_data *data = dev_get_drvdata(dev);
 	return sprintf(buf, "%u\n", data->vrm);
 }
-static ssize_t
-store_vrm_reg(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
+static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr,
+		const char *buf, size_t count)
 {
 	struct it87_data *data = dev_get_drvdata(dev);
-	u32 val;
+	unsigned long val;
+
+	if (strict_strtoul(buf, 10, &val) < 0)
+		return -EINVAL;
 
-	val = simple_strtoul(buf, NULL, 10);
 	data->vrm = val;
 
 	return count;
 }
 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
 
-static ssize_t
-show_vid_reg(struct device *dev, struct device_attribute *attr, char *buf)
+static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr,
+		char *buf)
 {
 	struct it87_data *data = it87_update_device(dev);
 	return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm));
@@ -931,51 +1106,135 @@ static const struct attribute_group it87_group = {
 	.attrs = it87_attributes,
 };
 
-static struct attribute *it87_attributes_opt[] = {
+static struct attribute *it87_attributes_beep[] = {
+	&sensor_dev_attr_in0_beep.dev_attr.attr,
+	&sensor_dev_attr_in1_beep.dev_attr.attr,
+	&sensor_dev_attr_in2_beep.dev_attr.attr,
+	&sensor_dev_attr_in3_beep.dev_attr.attr,
+	&sensor_dev_attr_in4_beep.dev_attr.attr,
+	&sensor_dev_attr_in5_beep.dev_attr.attr,
+	&sensor_dev_attr_in6_beep.dev_attr.attr,
+	&sensor_dev_attr_in7_beep.dev_attr.attr,
+
+	&sensor_dev_attr_temp1_beep.dev_attr.attr,
+	&sensor_dev_attr_temp2_beep.dev_attr.attr,
+	&sensor_dev_attr_temp3_beep.dev_attr.attr,
+	NULL
+};
+
+static const struct attribute_group it87_group_beep = {
+	.attrs = it87_attributes_beep,
+};
+
+static struct attribute *it87_attributes_fan16[5][3+1] = { {
 	&sensor_dev_attr_fan1_input16.dev_attr.attr,
 	&sensor_dev_attr_fan1_min16.dev_attr.attr,
+	&sensor_dev_attr_fan1_alarm.dev_attr.attr,
+	NULL
+}, {
 	&sensor_dev_attr_fan2_input16.dev_attr.attr,
 	&sensor_dev_attr_fan2_min16.dev_attr.attr,
+	&sensor_dev_attr_fan2_alarm.dev_attr.attr,
+	NULL
+}, {
 	&sensor_dev_attr_fan3_input16.dev_attr.attr,
 	&sensor_dev_attr_fan3_min16.dev_attr.attr,
+	&sensor_dev_attr_fan3_alarm.dev_attr.attr,
+	NULL
+}, {
 	&sensor_dev_attr_fan4_input16.dev_attr.attr,
 	&sensor_dev_attr_fan4_min16.dev_attr.attr,
+	&sensor_dev_attr_fan4_alarm.dev_attr.attr,
+	NULL
+}, {
 	&sensor_dev_attr_fan5_input16.dev_attr.attr,
 	&sensor_dev_attr_fan5_min16.dev_attr.attr,
+	&sensor_dev_attr_fan5_alarm.dev_attr.attr,
+	NULL
+} };
+
+static const struct attribute_group it87_group_fan16[5] = {
+	{ .attrs = it87_attributes_fan16[0] },
+	{ .attrs = it87_attributes_fan16[1] },
+	{ .attrs = it87_attributes_fan16[2] },
+	{ .attrs = it87_attributes_fan16[3] },
+	{ .attrs = it87_attributes_fan16[4] },
+};
 
+static struct attribute *it87_attributes_fan[3][4+1] = { {
 	&sensor_dev_attr_fan1_input.dev_attr.attr,
 	&sensor_dev_attr_fan1_min.dev_attr.attr,
 	&sensor_dev_attr_fan1_div.dev_attr.attr,
+	&sensor_dev_attr_fan1_alarm.dev_attr.attr,
+	NULL
+}, {
 	&sensor_dev_attr_fan2_input.dev_attr.attr,
 	&sensor_dev_attr_fan2_min.dev_attr.attr,
 	&sensor_dev_attr_fan2_div.dev_attr.attr,
+	&sensor_dev_attr_fan2_alarm.dev_attr.attr,
+	NULL
+}, {
 	&sensor_dev_attr_fan3_input.dev_attr.attr,
 	&sensor_dev_attr_fan3_min.dev_attr.attr,
 	&sensor_dev_attr_fan3_div.dev_attr.attr,
-
-	&sensor_dev_attr_fan1_alarm.dev_attr.attr,
-	&sensor_dev_attr_fan2_alarm.dev_attr.attr,
 	&sensor_dev_attr_fan3_alarm.dev_attr.attr,
-	&sensor_dev_attr_fan4_alarm.dev_attr.attr,
-	&sensor_dev_attr_fan5_alarm.dev_attr.attr,
+	NULL
+} };
 
+static const struct attribute_group it87_group_fan[3] = {
+	{ .attrs = it87_attributes_fan[0] },
+	{ .attrs = it87_attributes_fan[1] },
+	{ .attrs = it87_attributes_fan[2] },
+};
+
+static const struct attribute_group *
+it87_get_fan_group(const struct it87_data *data)
+{
+	return has_16bit_fans(data) ? it87_group_fan16 : it87_group_fan;
+}
+
+static struct attribute *it87_attributes_pwm[3][4+1] = { {
 	&sensor_dev_attr_pwm1_enable.dev_attr.attr,
-	&sensor_dev_attr_pwm2_enable.dev_attr.attr,
-	&sensor_dev_attr_pwm3_enable.dev_attr.attr,
 	&sensor_dev_attr_pwm1.dev_attr.attr,
-	&sensor_dev_attr_pwm2.dev_attr.attr,
-	&sensor_dev_attr_pwm3.dev_attr.attr,
 	&dev_attr_pwm1_freq.attr,
+	&sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
+	NULL
+}, {
+	&sensor_dev_attr_pwm2_enable.dev_attr.attr,
+	&sensor_dev_attr_pwm2.dev_attr.attr,
 	&dev_attr_pwm2_freq.attr,
+	&sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
+	NULL
+}, {
+	&sensor_dev_attr_pwm3_enable.dev_attr.attr,
+	&sensor_dev_attr_pwm3.dev_attr.attr,
 	&dev_attr_pwm3_freq.attr,
+	&sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
+	NULL
+} };
+
+static const struct attribute_group it87_group_pwm[3] = {
+	{ .attrs = it87_attributes_pwm[0] },
+	{ .attrs = it87_attributes_pwm[1] },
+	{ .attrs = it87_attributes_pwm[2] },
+};
 
+static struct attribute *it87_attributes_fan_beep[] = {
+	&sensor_dev_attr_fan1_beep.dev_attr.attr,
+	&sensor_dev_attr_fan2_beep.dev_attr.attr,
+	&sensor_dev_attr_fan3_beep.dev_attr.attr,
+	&sensor_dev_attr_fan4_beep.dev_attr.attr,
+	&sensor_dev_attr_fan5_beep.dev_attr.attr,
+};
+
+static struct attribute *it87_attributes_vid[] = {
 	&dev_attr_vrm.attr,
 	&dev_attr_cpu0_vid.attr,
 	NULL
 };
 
-static const struct attribute_group it87_group_opt = {
-	.attrs = it87_attributes_opt,
+static const struct attribute_group it87_group_vid = {
+	.attrs = it87_attributes_vid,
 };
 
 /* SuperIO detection - will change isa_address if a chip is found */
@@ -1035,6 +1294,10 @@ static int __init it87_find(unsigned short *address,
 	if (sio_data->type == it87) {
 		/* The IT8705F doesn't have VID pins at all */
 		sio_data->skip_vid = 1;
+
+		/* The IT8705F has a different LD number for GPIO */
+		superio_select(5);
+		sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
 	} else {
 		int reg;
 
@@ -1068,7 +1331,11 @@ static int __init it87_find(unsigned short *address,
 			pr_info("it87: in3 is VCC (+5V)\n");
 		if (reg & (1 << 1))
 			pr_info("it87: in7 is VCCH (+5V Stand-By)\n");
+
+		sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
 	}
+	if (sio_data->beep_pin)
+		pr_info("it87: Beeping is supported\n");
 
 	/* Disable specific features based on DMI strings */
 	board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
@@ -1093,14 +1360,43 @@ exit:
 	return err;
 }
 
+static void it87_remove_files(struct device *dev)
+{
+	struct it87_data *data = platform_get_drvdata(pdev);
+	struct it87_sio_data *sio_data = dev->platform_data;
+	const struct attribute_group *fan_group = it87_get_fan_group(data);
+	int i;
+
+	sysfs_remove_group(&dev->kobj, &it87_group);
+	if (sio_data->beep_pin)
+		sysfs_remove_group(&dev->kobj, &it87_group_beep);
+	for (i = 0; i < 5; i++) {
+		if (!(data->has_fan & (1 << i)))
+			continue;
+		sysfs_remove_group(&dev->kobj, &fan_group[i]);
+		if (sio_data->beep_pin)
+			sysfs_remove_file(&dev->kobj,
+					  it87_attributes_fan_beep[i]);
+	}
+	for (i = 0; i < 3; i++) {
+		if (sio_data->skip_pwm & (1 << 0))
+			continue;
+		sysfs_remove_group(&dev->kobj, &it87_group_pwm[i]);
+	}
+	if (!sio_data->skip_vid)
+		sysfs_remove_group(&dev->kobj, &it87_group_vid);
+}
+
 static int __devinit it87_probe(struct platform_device *pdev)
 {
 	struct it87_data *data;
 	struct resource *res;
 	struct device *dev = &pdev->dev;
 	struct it87_sio_data *sio_data = dev->platform_data;
-	int err = 0;
+	const struct attribute_group *fan_group;
+	int err = 0, i;
 	int enable_pwm_interface;
+	int fan_beep_need_rw;
 	static const char *names[] = {
 		"it87",
 		"it8712",
@@ -1118,7 +1414,8 @@ static int __devinit it87_probe(struct platform_device *pdev)
 		goto ERROR0;
 	}
 
-	if (!(data = kzalloc(sizeof(struct it87_data), GFP_KERNEL))) {
+	data = kzalloc(sizeof(struct it87_data), GFP_KERNEL);
+	if (!data) {
 		err = -ENOMEM;
 		goto ERROR1;
 	}
@@ -1146,120 +1443,53 @@ static int __devinit it87_probe(struct platform_device *pdev)
 	it87_init_device(pdev);
 
 	/* Register sysfs hooks */
-	if ((err = sysfs_create_group(&dev->kobj, &it87_group)))
+	err = sysfs_create_group(&dev->kobj, &it87_group);
+	if (err)
 		goto ERROR2;
 
+	if (sio_data->beep_pin) {
+		err = sysfs_create_group(&dev->kobj, &it87_group_beep);
+		if (err)
+			goto ERROR4;
+	}
+
 	/* Do not create fan files for disabled fans */
-	if (has_16bit_fans(data)) {
-		/* 16-bit tachometers */
-		if (data->has_fan & (1 << 0)) {
-			if ((err = device_create_file(dev,
-			     &sensor_dev_attr_fan1_input16.dev_attr))
-			 || (err = device_create_file(dev,
-			     &sensor_dev_attr_fan1_min16.dev_attr))
-			 || (err = device_create_file(dev,
-			     &sensor_dev_attr_fan1_alarm.dev_attr)))
-				goto ERROR4;
-		}
-		if (data->has_fan & (1 << 1)) {
-			if ((err = device_create_file(dev,
-			     &sensor_dev_attr_fan2_input16.dev_attr))
-			 || (err = device_create_file(dev,
-			     &sensor_dev_attr_fan2_min16.dev_attr))
-			 || (err = device_create_file(dev,
-			     &sensor_dev_attr_fan2_alarm.dev_attr)))
-				goto ERROR4;
-		}
-		if (data->has_fan & (1 << 2)) {
-			if ((err = device_create_file(dev,
-			     &sensor_dev_attr_fan3_input16.dev_attr))
-			 || (err = device_create_file(dev,
-			     &sensor_dev_attr_fan3_min16.dev_attr))
-			 || (err = device_create_file(dev,
-			     &sensor_dev_attr_fan3_alarm.dev_attr)))
-				goto ERROR4;
-		}
-		if (data->has_fan & (1 << 3)) {
-			if ((err = device_create_file(dev,
-			     &sensor_dev_attr_fan4_input16.dev_attr))
-			 || (err = device_create_file(dev,
-			     &sensor_dev_attr_fan4_min16.dev_attr))
-			 || (err = device_create_file(dev,
-			     &sensor_dev_attr_fan4_alarm.dev_attr)))
-				goto ERROR4;
-		}
-		if (data->has_fan & (1 << 4)) {
-			if ((err = device_create_file(dev,
-			     &sensor_dev_attr_fan5_input16.dev_attr))
-			 || (err = device_create_file(dev,
-			     &sensor_dev_attr_fan5_min16.dev_attr))
-			 || (err = device_create_file(dev,
-			     &sensor_dev_attr_fan5_alarm.dev_attr)))
-				goto ERROR4;
-		}
-	} else {
-		/* 8-bit tachometers with clock divider */
-		if (data->has_fan & (1 << 0)) {
-			if ((err = device_create_file(dev,
-			     &sensor_dev_attr_fan1_input.dev_attr))
-			 || (err = device_create_file(dev,
-			     &sensor_dev_attr_fan1_min.dev_attr))
-			 || (err = device_create_file(dev,
-			     &sensor_dev_attr_fan1_div.dev_attr))
-			 || (err = device_create_file(dev,
-			     &sensor_dev_attr_fan1_alarm.dev_attr)))
-				goto ERROR4;
-		}
-		if (data->has_fan & (1 << 1)) {
-			if ((err = device_create_file(dev,
-			     &sensor_dev_attr_fan2_input.dev_attr))
-			 || (err = device_create_file(dev,
-			     &sensor_dev_attr_fan2_min.dev_attr))
-			 || (err = device_create_file(dev,
-			     &sensor_dev_attr_fan2_div.dev_attr))
-			 || (err = device_create_file(dev,
-			     &sensor_dev_attr_fan2_alarm.dev_attr)))
-				goto ERROR4;
-		}
-		if (data->has_fan & (1 << 2)) {
-			if ((err = device_create_file(dev,
-			     &sensor_dev_attr_fan3_input.dev_attr))
-			 || (err = device_create_file(dev,
-			     &sensor_dev_attr_fan3_min.dev_attr))
-			 || (err = device_create_file(dev,
-			     &sensor_dev_attr_fan3_div.dev_attr))
-			 || (err = device_create_file(dev,
-			     &sensor_dev_attr_fan3_alarm.dev_attr)))
+	fan_group = it87_get_fan_group(data);
+	fan_beep_need_rw = 1;
+	for (i = 0; i < 5; i++) {
+		if (!(data->has_fan & (1 << i)))
+			continue;
+		err = sysfs_create_group(&dev->kobj, &fan_group[i]);
+		if (err)
+			goto ERROR4;
+
+		if (sio_data->beep_pin) {
+			err = sysfs_create_file(&dev->kobj,
+						it87_attributes_fan_beep[i]);
+			if (err)
 				goto ERROR4;
+			if (!fan_beep_need_rw)
+				continue;
+
+			/* As we have a single beep enable bit for all fans,
+			 * only the first enabled fan has a writable attribute
+			 * for it. */
+			if (sysfs_chmod_file(&dev->kobj,
+					     it87_attributes_fan_beep[i],
+					     S_IRUGO | S_IWUSR))
+				dev_dbg(dev, "chmod +w fan%d_beep failed\n",
+					i + 1);
+			fan_beep_need_rw = 0;
 		}
 	}
 
 	if (enable_pwm_interface) {
-		if (!(sio_data->skip_pwm & (1 << 0))) {
-			if ((err = device_create_file(dev,
-			     &sensor_dev_attr_pwm1_enable.dev_attr))
-			 || (err = device_create_file(dev,
-			     &sensor_dev_attr_pwm1.dev_attr))
-			 || (err = device_create_file(dev,
-			     &dev_attr_pwm1_freq)))
-				goto ERROR4;
-		}
-		if (!(sio_data->skip_pwm & (1 << 1))) {
-			if ((err = device_create_file(dev,
-			     &sensor_dev_attr_pwm2_enable.dev_attr))
-			 || (err = device_create_file(dev,
-			     &sensor_dev_attr_pwm2.dev_attr))
-			 || (err = device_create_file(dev,
-			     &dev_attr_pwm2_freq)))
-				goto ERROR4;
-		}
-		if (!(sio_data->skip_pwm & (1 << 2))) {
-			if ((err = device_create_file(dev,
-			     &sensor_dev_attr_pwm3_enable.dev_attr))
-			 || (err = device_create_file(dev,
-			     &sensor_dev_attr_pwm3.dev_attr))
-			 || (err = device_create_file(dev,
-			     &dev_attr_pwm3_freq)))
+		for (i = 0; i < 3; i++) {
+			if (sio_data->skip_pwm & (1 << i))
+				continue;
+			err = sysfs_create_group(&dev->kobj,
+						 &it87_group_pwm[i]);
+			if (err)
 				goto ERROR4;
 		}
 	}
@@ -1268,10 +1498,8 @@ static int __devinit it87_probe(struct platform_device *pdev)
 		data->vrm = vid_which_vrm();
 		/* VID reading from Super-I/O config space if available */
 		data->vid = sio_data->vid_value;
-		if ((err = device_create_file(dev,
-		     &dev_attr_vrm))
-		 || (err = device_create_file(dev,
-		     &dev_attr_cpu0_vid)))
+		err = sysfs_create_group(&dev->kobj, &it87_group_vid);
+		if (err)
 			goto ERROR4;
 	}
 
@@ -1284,8 +1512,7 @@ static int __devinit it87_probe(struct platform_device *pdev)
 	return 0;
 
 ERROR4:
-	sysfs_remove_group(&dev->kobj, &it87_group);
-	sysfs_remove_group(&dev->kobj, &it87_group_opt);
+	it87_remove_files(dev);
 ERROR2:
 	platform_set_drvdata(pdev, NULL);
 	kfree(data);
@@ -1300,8 +1527,7 @@ static int __devexit it87_remove(struct platform_device *pdev)
 	struct it87_data *data = platform_get_drvdata(pdev);
 
 	hwmon_device_unregister(data->hwmon_dev);
-	sysfs_remove_group(&pdev->dev.kobj, &it87_group);
-	sysfs_remove_group(&pdev->dev.kobj, &it87_group_opt);
+	it87_remove_files(&pdev->dev);
 
 	release_region(data->addr, IT87_EC_EXTENT);
 	platform_set_drvdata(pdev, NULL);
@@ -1387,15 +1613,18 @@ static void __devinit it87_init_device(struct platform_device *pdev)
 	int tmp, i;
 	u8 mask;
 
-	/* initialize to sane defaults:
-	 * - if the chip is in manual pwm mode, this will be overwritten with
-	 *   the actual settings on the chip (so in this case, initialization
-	 *   is not needed)
-	 * - if in automatic or on/off mode, we could switch to manual mode,
-	 *   read the registers and set manual_pwm_ctl accordingly, but currently
-	 *   this is not implemented, so we initialize to something sane */
+	/* For each PWM channel:
+	 * - If it is in automatic mode, setting to manual mode should set
+	 *   the fan to full speed by default.
+	 * - If it is in manual mode, we need a mapping to temperature
+	 *   channels to use when later setting to automatic mode later.
+	 *   Use a 1:1 mapping by default (we are clueless.)
+	 * In both cases, the value can (and should) be changed by the user
+	 * prior to switching to a different mode. */
 	for (i = 0; i < 3; i++) {
-		data->manual_pwm_ctl[i] = 0xff;
+		data->pwm_temp_map[i] = i;
+		data->pwm_duty[i] = 0x7f;	/* Full speed */
+
 	}
 
 	/* Some chips seem to have default value 0xff for all limit
@@ -1436,7 +1665,8 @@ static void __devinit it87_init_device(struct platform_device *pdev)
 	if ((data->fan_main_ctrl & mask) == 0) {
 		/* Enable all fan tachometers */
 		data->fan_main_ctrl |= mask;
-		it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl);
+		it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
+				 data->fan_main_ctrl);
 	}
 	data->has_fan = (data->fan_main_ctrl >> 4) & 0x07;
 
@@ -1461,30 +1691,21 @@ static void __devinit it87_init_device(struct platform_device *pdev)
 	/* Fan input pins may be used for alternative functions */
 	data->has_fan &= ~sio_data->skip_fan;
 
-	/* Set current fan mode registers and the default settings for the
-	 * other mode registers */
-	for (i = 0; i < 3; i++) {
-		if (data->fan_main_ctrl & (1 << i)) {
-			/* pwm mode */
-			tmp = it87_read_value(data, IT87_REG_PWM(i));
-			if (tmp & 0x80) {
-				/* automatic pwm - not yet implemented, but
-				 * leave the settings made by the BIOS alone
-				 * until a change is requested via the sysfs
-				 * interface */
-			} else {
-				/* manual pwm */
-				data->manual_pwm_ctl[i] = PWM_FROM_REG(tmp);
-			}
-		}
- 	}
-
 	/* Start monitoring */
 	it87_write_value(data, IT87_REG_CONFIG,
 			 (it87_read_value(data, IT87_REG_CONFIG) & 0x36)
 			 | (update_vbat ? 0x41 : 0x01));
 }
 
+static void it87_update_pwm_ctrl(struct it87_data *data, int nr)
+{
+	data->pwm_ctrl[nr] = it87_read_value(data, IT87_REG_PWM(nr));
+	if (data->pwm_ctrl[nr] & 0x80)	/* Automatic mode */
+		data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
+	else				/* Manual mode */
+		data->pwm_duty[nr] = data->pwm_ctrl[nr] & 0x7f;
+}
+
 static struct it87_data *it87_update_device(struct device *dev)
 {
 	struct it87_data *data = dev_get_drvdata(dev);
@@ -1494,24 +1715,22 @@ static struct it87_data *it87_update_device(struct device *dev)
 
 	if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
 	    || !data->valid) {
-
 		if (update_vbat) {
 			/* Cleared after each update, so reenable.  Value
-		 	  returned by this read will be previous value */	
+			   returned by this read will be previous value */
 			it87_write_value(data, IT87_REG_CONFIG,
-			   it87_read_value(data, IT87_REG_CONFIG) | 0x40);
+				it87_read_value(data, IT87_REG_CONFIG) | 0x40);
 		}
 		for (i = 0; i <= 7; i++) {
 			data->in[i] =
-			    it87_read_value(data, IT87_REG_VIN(i));
+				it87_read_value(data, IT87_REG_VIN(i));
 			data->in_min[i] =
-			    it87_read_value(data, IT87_REG_VIN_MIN(i));
+				it87_read_value(data, IT87_REG_VIN_MIN(i));
 			data->in_max[i] =
-			    it87_read_value(data, IT87_REG_VIN_MAX(i));
+				it87_read_value(data, IT87_REG_VIN_MAX(i));
 		}
 		/* in8 (battery) has no limit registers */
-		data->in[8] =
-		    it87_read_value(data, IT87_REG_VIN(8));
+		data->in[8] = it87_read_value(data, IT87_REG_VIN(8));
 
 		for (i = 0; i < 5; i++) {
 			/* Skip disabled fans */
@@ -1519,7 +1738,7 @@ static struct it87_data *it87_update_device(struct device *dev)
 				continue;
 
 			data->fan_min[i] =
-			    it87_read_value(data, IT87_REG_FAN_MIN[i]);
+				it87_read_value(data, IT87_REG_FAN_MIN[i]);
 			data->fan[i] = it87_read_value(data,
 				       IT87_REG_FAN[i]);
 			/* Add high byte if in 16-bit mode */
@@ -1532,11 +1751,11 @@ static struct it87_data *it87_update_device(struct device *dev)
 		}
 		for (i = 0; i < 3; i++) {
 			data->temp[i] =
-			    it87_read_value(data, IT87_REG_TEMP(i));
+				it87_read_value(data, IT87_REG_TEMP(i));
 			data->temp_high[i] =
-			    it87_read_value(data, IT87_REG_TEMP_HIGH(i));
+				it87_read_value(data, IT87_REG_TEMP_HIGH(i));
 			data->temp_low[i] =
-			    it87_read_value(data, IT87_REG_TEMP_LOW(i));
+				it87_read_value(data, IT87_REG_TEMP_LOW(i));
 		}
 
 		/* Newer chips don't have clock dividers */
@@ -1551,9 +1770,13 @@ static struct it87_data *it87_update_device(struct device *dev)
 			it87_read_value(data, IT87_REG_ALARM1) |
 			(it87_read_value(data, IT87_REG_ALARM2) << 8) |
 			(it87_read_value(data, IT87_REG_ALARM3) << 16);
+		data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
+
 		data->fan_main_ctrl = it87_read_value(data,
 				IT87_REG_FAN_MAIN_CTRL);
 		data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL);
+		for (i = 0; i < 3; i++)
+			it87_update_pwm_ctrl(data, i);
 
 		data->sensor = it87_read_value(data, IT87_REG_TEMP_ENABLE);
 		/* The 8705 does not have VID capability.
@@ -1628,7 +1851,7 @@ exit:
 static int __init sm_it87_init(void)
 {
 	int err;
-	unsigned short isa_address=0;
+	unsigned short isa_address = 0;
 	struct it87_sio_data sio_data;
 
 	memset(&sio_data, 0, sizeof(struct it87_sio_data));
@@ -1640,7 +1863,7 @@ static int __init sm_it87_init(void)
 		return err;
 
 	err = it87_device_add(isa_address, &sio_data);
-	if (err){
+	if (err) {
 		platform_driver_unregister(&it87_driver);
 		return err;
 	}
@@ -1661,7 +1884,8 @@ MODULE_DESCRIPTION("IT8705F/8712F/8716F/8718F/8720F/8726F, SiS950 driver");
 module_param(update_vbat, bool, 0);
 MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value");
 module_param(fix_pwm_polarity, bool, 0);
-MODULE_PARM_DESC(fix_pwm_polarity, "Force PWM polarity to active high (DANGEROUS)");
+MODULE_PARM_DESC(fix_pwm_polarity,
+		 "Force PWM polarity to active high (DANGEROUS)");
 MODULE_LICENSE("GPL");
 
 module_init(sm_it87_init);
diff --git a/drivers/hwmon/lm90.c b/drivers/hwmon/lm90.c
index 7c9bdc167426..ddf617f3a713 100644
--- a/drivers/hwmon/lm90.c
+++ b/drivers/hwmon/lm90.c
@@ -93,7 +93,8 @@
 static const unsigned short normal_i2c[] = {
 	0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x4c, 0x4d, 0x4e, I2C_CLIENT_END };
 
-enum chips { lm90, adm1032, lm99, lm86, max6657, adt7461, max6680, max6646 };
+enum chips { lm90, adm1032, lm99, lm86, max6657, adt7461, max6680, max6646,
+	w83l771 };
 
 /*
  * The LM90 registers
@@ -173,6 +174,7 @@ static const struct i2c_device_id lm90_id[] = {
 	{ "max6659", max6657 },
 	{ "max6680", max6680 },
 	{ "max6681", max6680 },
+	{ "w83l771", w83l771 },
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, lm90_id);
@@ -758,6 +760,14 @@ static int lm90_detect(struct i2c_client *new_client,
 		 && reg_convrate <= 0x07) {
 			name = "max6646";
 		}
+	} else
+	if (address == 0x4C
+	 && man_id == 0x5C) { /* Winbond/Nuvoton */
+		if ((chip_id & 0xFE) == 0x10 /* W83L771AWG/ASG */
+		 && (reg_config1 & 0x2A) == 0x00
+		 && reg_convrate <= 0x08) {
+			name = "w83l771";
+		}
 	}
 
 	if (!name) { /* identification failed */
diff --git a/drivers/hwmon/w83793.c b/drivers/hwmon/w83793.c
index 9a2022b67495..9de81a4c15a2 100644
--- a/drivers/hwmon/w83793.c
+++ b/drivers/hwmon/w83793.c
@@ -3,6 +3,10 @@
     Copyright (C) 2006 Winbond Electronics Corp.
                   Yuan Mu
                   Rudolf Marek <r.marek@assembler.cz>
+    Copyright (C) 2009-2010 Sven Anders <anders@anduras.de>, ANDURAS AG.
+		  Watchdog driver part
+		  (Based partially on fschmd driver,
+		   Copyright 2007-2008 by Hans de Goede)
 
     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
@@ -35,6 +39,16 @@
 #include <linux/hwmon-sysfs.h>
 #include <linux/err.h>
 #include <linux/mutex.h>
+#include <linux/fs.h>
+#include <linux/watchdog.h>
+#include <linux/miscdevice.h>
+#include <linux/uaccess.h>
+#include <linux/kref.h>
+#include <linux/notifier.h>
+#include <linux/reboot.h>
+
+/* Default values */
+#define WATCHDOG_TIMEOUT 2	/* 2 minute default timeout */
 
 /* Addresses to scan */
 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f,
@@ -51,6 +65,18 @@ static int reset;
 module_param(reset, bool, 0);
 MODULE_PARM_DESC(reset, "Set to 1 to reset chip, not recommended");
 
+static int timeout = WATCHDOG_TIMEOUT;	/* default timeout in minutes */
+module_param(timeout, int, 0);
+MODULE_PARM_DESC(timeout,
+	"Watchdog timeout in minutes. 2<= timeout <=255 (default="
+				__MODULE_STRING(WATCHDOG_TIMEOUT) ")");
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout,
+	"Watchdog cannot be stopped once started (default="
+				__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
 /*
    Address 0x00, 0x0d, 0x0e, 0x0f in all three banks are reserved
    as ID, Bank Select registers
@@ -72,6 +98,11 @@ MODULE_PARM_DESC(reset, "Set to 1 to reset chip, not recommended");
 #define W83793_REG_VID_LATCHB		0x08
 #define W83793_REG_VID_CTRL		0x59
 
+#define W83793_REG_WDT_LOCK		0x01
+#define W83793_REG_WDT_ENABLE		0x02
+#define W83793_REG_WDT_STATUS		0x03
+#define W83793_REG_WDT_TIMEOUT		0x04
+
 static u16 W83793_REG_TEMP_MODE[2] = { 0x5e, 0x5f };
 
 #define TEMP_READ	0
@@ -223,8 +254,37 @@ struct w83793_data {
 	u8 tolerance[3];	/* Temp tolerance(Smart Fan I/II) */
 	u8 sf2_pwm[6][7];	/* Smart FanII: Fan duty cycle */
 	u8 sf2_temp[6][7];	/* Smart FanII: Temp level point */
+
+	/* watchdog */
+	struct i2c_client *client;
+	struct mutex watchdog_lock;
+	struct list_head list; /* member of the watchdog_data_list */
+	struct kref kref;
+	struct miscdevice watchdog_miscdev;
+	unsigned long watchdog_is_open;
+	char watchdog_expect_close;
+	char watchdog_name[10]; /* must be unique to avoid sysfs conflict */
+	unsigned int watchdog_caused_reboot;
+	int watchdog_timeout; /* watchdog timeout in minutes */
 };
 
+/* Somewhat ugly :( global data pointer list with all devices, so that
+   we can find our device data as when using misc_register. There is no
+   other method to get to one's device data from the open file-op and
+   for usage in the reboot notifier callback. */
+static LIST_HEAD(watchdog_data_list);
+
+/* Note this lock not only protect list access, but also data.kref access */
+static DEFINE_MUTEX(watchdog_data_mutex);
+
+/* Release our data struct when we're detached from the i2c client *and* all
+   references to our watchdog device are released */
+static void w83793_release_resources(struct kref *ref)
+{
+	struct w83793_data *data = container_of(ref, struct w83793_data, kref);
+	kfree(data);
+}
+
 static u8 w83793_read_value(struct i2c_client *client, u16 reg);
 static int w83793_write_value(struct i2c_client *client, u16 reg, u8 value);
 static int w83793_probe(struct i2c_client *client,
@@ -1063,14 +1123,349 @@ static void w83793_init_client(struct i2c_client *client)
 	/* Start monitoring */
 	w83793_write_value(client, W83793_REG_CONFIG,
 			   w83793_read_value(client, W83793_REG_CONFIG) | 0x01);
+}
+
+/*
+ * Watchdog routines
+ */
+
+static int watchdog_set_timeout(struct w83793_data *data, int timeout)
+{
+	int ret, mtimeout;
+
+	mtimeout = DIV_ROUND_UP(timeout, 60);
+
+	if (mtimeout > 255)
+		return -EINVAL;
+
+	mutex_lock(&data->watchdog_lock);
+	if (!data->client) {
+		ret = -ENODEV;
+		goto leave;
+	}
+
+	data->watchdog_timeout = mtimeout;
+
+	/* Set Timeout value (in Minutes) */
+	w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT,
+			   data->watchdog_timeout);
+
+	ret = mtimeout * 60;
+
+leave:
+	mutex_unlock(&data->watchdog_lock);
+	return ret;
+}
+
+static int watchdog_get_timeout(struct w83793_data *data)
+{
+	int timeout;
+
+	mutex_lock(&data->watchdog_lock);
+	timeout = data->watchdog_timeout * 60;
+	mutex_unlock(&data->watchdog_lock);
+
+	return timeout;
+}
+
+static int watchdog_trigger(struct w83793_data *data)
+{
+	int ret = 0;
+
+	mutex_lock(&data->watchdog_lock);
+	if (!data->client) {
+		ret = -ENODEV;
+		goto leave;
+	}
+
+	/* Set Timeout value (in Minutes) */
+	w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT,
+			   data->watchdog_timeout);
+
+leave:
+	mutex_unlock(&data->watchdog_lock);
+	return ret;
+}
+
+static int watchdog_enable(struct w83793_data *data)
+{
+	int ret = 0;
+
+	mutex_lock(&data->watchdog_lock);
+	if (!data->client) {
+		ret = -ENODEV;
+		goto leave;
+	}
+
+	/* Set initial timeout */
+	w83793_write_value(data->client, W83793_REG_WDT_TIMEOUT,
+			   data->watchdog_timeout);
+
+	/* Enable Soft Watchdog */
+	w83793_write_value(data->client, W83793_REG_WDT_LOCK, 0x55);
+
+leave:
+	mutex_unlock(&data->watchdog_lock);
+	return ret;
+}
+
+static int watchdog_disable(struct w83793_data *data)
+{
+	int ret = 0;
+
+	mutex_lock(&data->watchdog_lock);
+	if (!data->client) {
+		ret = -ENODEV;
+		goto leave;
+	}
+
+	/* Disable Soft Watchdog */
+	w83793_write_value(data->client, W83793_REG_WDT_LOCK, 0xAA);
+
+leave:
+	mutex_unlock(&data->watchdog_lock);
+	return ret;
+}
+
+static int watchdog_open(struct inode *inode, struct file *filp)
+{
+	struct w83793_data *pos, *data = NULL;
+	int watchdog_is_open;
+
+	/* We get called from drivers/char/misc.c with misc_mtx hold, and we
+	   call misc_register() from  w83793_probe() with watchdog_data_mutex
+	   hold, as misc_register() takes the misc_mtx lock, this is a possible
+	   deadlock, so we use mutex_trylock here. */
+	if (!mutex_trylock(&watchdog_data_mutex))
+		return -ERESTARTSYS;
+	list_for_each_entry(pos, &watchdog_data_list, list) {
+		if (pos->watchdog_miscdev.minor == iminor(inode)) {
+			data = pos;
+			break;
+		}
+	}
+
+	/* Check, if device is already open */
+	watchdog_is_open = test_and_set_bit(0, &data->watchdog_is_open);
+
+	/* Increase data reference counter (if not already done).
+	   Note we can never not have found data, so we don't check for this */
+	if (!watchdog_is_open)
+		kref_get(&data->kref);
+
+	mutex_unlock(&watchdog_data_mutex);
+
+	/* Check, if device is already open and possibly issue error */
+	if (watchdog_is_open)
+		return -EBUSY;
+
+	/* Enable Soft Watchdog */
+	watchdog_enable(data);
+
+	/* Store pointer to data into filp's private data */
+	filp->private_data = data;
+
+	return nonseekable_open(inode, filp);
+}
+
+static int watchdog_close(struct inode *inode, struct file *filp)
+{
+	struct w83793_data *data = filp->private_data;
 
+	if (data->watchdog_expect_close) {
+		watchdog_disable(data);
+		data->watchdog_expect_close = 0;
+	} else {
+		watchdog_trigger(data);
+		dev_crit(&data->client->dev,
+			"unexpected close, not stopping watchdog!\n");
+	}
+
+	clear_bit(0, &data->watchdog_is_open);
+
+	/* Decrease data reference counter */
+	mutex_lock(&watchdog_data_mutex);
+	kref_put(&data->kref, w83793_release_resources);
+	mutex_unlock(&watchdog_data_mutex);
+
+	return 0;
+}
+
+static ssize_t watchdog_write(struct file *filp, const char __user *buf,
+	size_t count, loff_t *offset)
+{
+	size_t ret;
+	struct w83793_data *data = filp->private_data;
+
+	if (count) {
+		if (!nowayout) {
+			size_t i;
+
+			/* Clear it in case it was set with a previous write */
+			data->watchdog_expect_close = 0;
+
+			for (i = 0; i != count; i++) {
+				char c;
+				if (get_user(c, buf + i))
+					return -EFAULT;
+				if (c == 'V')
+					data->watchdog_expect_close = 1;
+			}
+		}
+		ret = watchdog_trigger(data);
+		if (ret < 0)
+			return ret;
+	}
+	return count;
+}
+
+static int watchdog_ioctl(struct inode *inode, struct file *filp,
+			  unsigned int cmd, unsigned long arg)
+{
+	static struct watchdog_info ident = {
+		.options = WDIOF_KEEPALIVEPING |
+			   WDIOF_SETTIMEOUT |
+			   WDIOF_CARDRESET,
+		.identity = "w83793 watchdog"
+	};
+
+	int val, ret = 0;
+	struct w83793_data *data = filp->private_data;
+
+	switch (cmd) {
+	case WDIOC_GETSUPPORT:
+		if (!nowayout)
+			ident.options |= WDIOF_MAGICCLOSE;
+		if (copy_to_user((void __user *)arg, &ident, sizeof(ident)))
+			ret = -EFAULT;
+		break;
+
+	case WDIOC_GETSTATUS:
+		val = data->watchdog_caused_reboot ? WDIOF_CARDRESET : 0;
+		ret = put_user(val, (int __user *)arg);
+		break;
+
+	case WDIOC_GETBOOTSTATUS:
+		ret = put_user(0, (int __user *)arg);
+		break;
+
+	case WDIOC_KEEPALIVE:
+		ret = watchdog_trigger(data);
+		break;
+
+	case WDIOC_GETTIMEOUT:
+		val = watchdog_get_timeout(data);
+		ret = put_user(val, (int __user *)arg);
+		break;
+
+	case WDIOC_SETTIMEOUT:
+		if (get_user(val, (int __user *)arg)) {
+			ret = -EFAULT;
+			break;
+		}
+		ret = watchdog_set_timeout(data, val);
+		if (ret > 0)
+			ret = put_user(ret, (int __user *)arg);
+		break;
+
+	case WDIOC_SETOPTIONS:
+		if (get_user(val, (int __user *)arg)) {
+			ret = -EFAULT;
+			break;
+		}
+
+		if (val & WDIOS_DISABLECARD)
+			ret = watchdog_disable(data);
+		else if (val & WDIOS_ENABLECARD)
+			ret = watchdog_enable(data);
+		else
+			ret = -EINVAL;
+
+		break;
+	default:
+		ret = -ENOTTY;
+	}
+
+	return ret;
+}
+
+static const struct file_operations watchdog_fops = {
+	.owner = THIS_MODULE,
+	.llseek = no_llseek,
+	.open = watchdog_open,
+	.release = watchdog_close,
+	.write = watchdog_write,
+	.ioctl = watchdog_ioctl,
+};
+
+/*
+ *	Notifier for system down
+ */
+
+static int watchdog_notify_sys(struct notifier_block *this, unsigned long code,
+			       void *unused)
+{
+	struct w83793_data *data = NULL;
+
+	if (code == SYS_DOWN || code == SYS_HALT) {
+
+		/* Disable each registered watchdog */
+		mutex_lock(&watchdog_data_mutex);
+		list_for_each_entry(data, &watchdog_data_list, list) {
+			if (data->watchdog_miscdev.minor)
+				watchdog_disable(data);
+		}
+		mutex_unlock(&watchdog_data_mutex);
+	}
+
+	return NOTIFY_DONE;
 }
 
+/*
+ *	The WDT needs to learn about soft shutdowns in order to
+ *	turn the timebomb registers off.
+ */
+
+static struct notifier_block watchdog_notifier = {
+	.notifier_call = watchdog_notify_sys,
+};
+
+/*
+ * Init / remove routines
+ */
+
 static int w83793_remove(struct i2c_client *client)
 {
 	struct w83793_data *data = i2c_get_clientdata(client);
 	struct device *dev = &client->dev;
-	int i;
+	int i, tmp;
+
+	/* Unregister the watchdog (if registered) */
+	if (data->watchdog_miscdev.minor) {
+		misc_deregister(&data->watchdog_miscdev);
+
+		if (data->watchdog_is_open) {
+			dev_warn(&client->dev,
+				"i2c client detached with watchdog open! "
+				"Stopping watchdog.\n");
+			watchdog_disable(data);
+		}
+
+		mutex_lock(&watchdog_data_mutex);
+		list_del(&data->list);
+		mutex_unlock(&watchdog_data_mutex);
+
+		/* Tell the watchdog code the client is gone */
+		mutex_lock(&data->watchdog_lock);
+		data->client = NULL;
+		mutex_unlock(&data->watchdog_lock);
+	}
+
+	/* Reset Configuration Register to Disable Watch Dog Registers */
+	tmp = w83793_read_value(client, W83793_REG_CONFIG);
+	w83793_write_value(client, W83793_REG_CONFIG, tmp & ~0x04);
+
+	unregister_reboot_notifier(&watchdog_notifier);
 
 	hwmon_device_unregister(data->hwmon_dev);
 
@@ -1099,7 +1494,10 @@ static int w83793_remove(struct i2c_client *client)
 	if (data->lm75[1] != NULL)
 		i2c_unregister_device(data->lm75[1]);
 
-	kfree(data);
+	/* Decrease data reference counter */
+	mutex_lock(&watchdog_data_mutex);
+	kref_put(&data->kref, w83793_release_resources);
+	mutex_unlock(&watchdog_data_mutex);
 
 	return 0;
 }
@@ -1203,6 +1601,7 @@ static int w83793_probe(struct i2c_client *client,
 			const struct i2c_device_id *id)
 {
 	struct device *dev = &client->dev;
+	const int watchdog_minors[] = { WATCHDOG_MINOR, 212, 213, 214, 215 };
 	struct w83793_data *data;
 	int i, tmp, val, err;
 	int files_fan = ARRAY_SIZE(w83793_left_fan) / 7;
@@ -1218,6 +1617,14 @@ static int w83793_probe(struct i2c_client *client,
 	i2c_set_clientdata(client, data);
 	data->bank = i2c_smbus_read_byte_data(client, W83793_REG_BANKSEL);
 	mutex_init(&data->update_lock);
+	mutex_init(&data->watchdog_lock);
+	INIT_LIST_HEAD(&data->list);
+	kref_init(&data->kref);
+
+	/* Store client pointer in our data struct for watchdog usage
+	   (where the client is found through a data ptr instead of the
+	   otherway around) */
+	data->client = client;
 
 	err = w83793_detect_subclients(client);
 	if (err)
@@ -1380,8 +1787,77 @@ static int w83793_probe(struct i2c_client *client,
 		goto exit_remove;
 	}
 
+	/* Watchdog initialization */
+
+	/* Register boot notifier */
+	err = register_reboot_notifier(&watchdog_notifier);
+	if (err != 0) {
+		dev_err(&client->dev,
+			"cannot register reboot notifier (err=%d)\n", err);
+		goto exit_devunreg;
+	}
+
+	/* Enable Watchdog registers.
+	   Set Configuration Register to Enable Watch Dog Registers
+	   (Bit 2) = XXXX, X1XX. */
+	tmp = w83793_read_value(client, W83793_REG_CONFIG);
+	w83793_write_value(client, W83793_REG_CONFIG, tmp | 0x04);
+
+	/* Set the default watchdog timeout */
+	data->watchdog_timeout = timeout;
+
+	/* Check, if last reboot was caused by watchdog */
+	data->watchdog_caused_reboot =
+	  w83793_read_value(data->client, W83793_REG_WDT_STATUS) & 0x01;
+
+	/* Disable Soft Watchdog during initialiation */
+	watchdog_disable(data);
+
+	/* We take the data_mutex lock early so that watchdog_open() cannot
+	   run when misc_register() has completed, but we've not yet added
+	   our data to the watchdog_data_list (and set the default timeout) */
+	mutex_lock(&watchdog_data_mutex);
+	for (i = 0; i < ARRAY_SIZE(watchdog_minors); i++) {
+		/* Register our watchdog part */
+		snprintf(data->watchdog_name, sizeof(data->watchdog_name),
+			"watchdog%c", (i == 0) ? '\0' : ('0' + i));
+		data->watchdog_miscdev.name = data->watchdog_name;
+		data->watchdog_miscdev.fops = &watchdog_fops;
+		data->watchdog_miscdev.minor = watchdog_minors[i];
+
+		err = misc_register(&data->watchdog_miscdev);
+		if (err == -EBUSY)
+			continue;
+		if (err) {
+			data->watchdog_miscdev.minor = 0;
+			dev_err(&client->dev,
+				"Registering watchdog chardev: %d\n", err);
+			break;
+		}
+
+		list_add(&data->list, &watchdog_data_list);
+
+		dev_info(&client->dev,
+			"Registered watchdog chardev major 10, minor: %d\n",
+			watchdog_minors[i]);
+		break;
+	}
+	if (i == ARRAY_SIZE(watchdog_minors)) {
+		data->watchdog_miscdev.minor = 0;
+		dev_warn(&client->dev, "Couldn't register watchdog chardev "
+			"(due to no free minor)\n");
+	}
+
+	mutex_unlock(&watchdog_data_mutex);
+
 	return 0;
 
+	/* Unregister hwmon device */
+
+exit_devunreg:
+
+	hwmon_device_unregister(data->hwmon_dev);
+
 	/* Unregister sysfs hooks */
 
 exit_remove:
@@ -1628,7 +2104,7 @@ static void __exit sensors_w83793_exit(void)
 	i2c_del_driver(&w83793_driver);
 }
 
-MODULE_AUTHOR("Yuan Mu");
+MODULE_AUTHOR("Yuan Mu, Sven Anders");
 MODULE_DESCRIPTION("w83793 driver");
 MODULE_LICENSE("GPL");