1 files changed, 363 insertions, 106 deletions

diff --git a/drivers/hwmon/it87.c b/drivers/hwmon/it87.c
index b0ee57492228..323ef06719c1 100644
--- a/drivers/hwmon/it87.c
+++ b/drivers/hwmon/it87.c
@@ -4,10 +4,12 @@
 
     Supports: IT8705F  Super I/O chip w/LPC interface
               IT8712F  Super I/O chip w/LPC interface & SMBus
+              IT8716F  Super I/O chip w/LPC interface
+              IT8718F  Super I/O chip w/LPC interface
               Sis950   A clone of the IT8705F
 
     Copyright (C) 2001 Chris Gauthron <chrisg@0-in.com> 
-    Largely inspired by lm78.c of the same package
+    Copyright (C) 2005-2006 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
@@ -24,13 +26,6 @@
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
 
-/*
-    djg@pdp8.net David Gesswein 7/18/01
-    Modified to fix bug with not all alarms enabled.
-    Added ability to read battery voltage and select temperature sensor
-    type at module load time.
-*/
-
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/slab.h>
@@ -42,6 +37,7 @@
 #include <linux/hwmon-vid.h>
 #include <linux/err.h>
 #include <linux/mutex.h>
+#include <linux/sysfs.h>
 #include <asm/io.h>
 
 
@@ -50,12 +46,13 @@ static unsigned short normal_i2c[] = { 0x2d, I2C_CLIENT_END };
 static unsigned short isa_address;
 
 /* Insmod parameters */
-I2C_CLIENT_INSMOD_2(it87, it8712);
+I2C_CLIENT_INSMOD_4(it87, it8712, it8716, it8718);
 
 #define	REG	0x2e	/* The register to read/write */
 #define	DEV	0x07	/* Register: Logical device select */
 #define	VAL	0x2f	/* The value to read/write */
 #define PME	0x04	/* The device with the fan registers in it */
+#define GPIO	0x07	/* The device with the IT8718F VID value in it */
 #define	DEVID	0x20	/* Register: Device ID */
 #define	DEVREV	0x22	/* Register: Device Revision */
 
@@ -77,10 +74,10 @@ static int superio_inw(int reg)
 }
 
 static inline void
-superio_select(void)
+superio_select(int ldn)
 {
 	outb(DEV, REG);
-	outb(PME, VAL);
+	outb(ldn, VAL);
 }
 
 static inline void
@@ -99,20 +96,27 @@ superio_exit(void)
 	outb(0x02, VAL);
 }
 
+/* Logical device 4 registers */
 #define IT8712F_DEVID 0x8712
 #define IT8705F_DEVID 0x8705
+#define IT8716F_DEVID 0x8716
+#define IT8718F_DEVID 0x8718
 #define IT87_ACT_REG  0x30
 #define IT87_BASE_REG 0x60
 
+/* Logical device 7 registers (IT8712F and later) */
+#define IT87_SIO_PINX2_REG	0x2c	/* Pin selection */
+#define IT87_SIO_VID_REG	0xfc	/* VID value */
+
 /* Update battery voltage after every reading if true */
 static int update_vbat;
 
 /* Not all BIOSes properly configure the PWM registers */
 static int fix_pwm_polarity;
 
-/* Chip Type */
-
+/* Values read from Super-I/O config space */
 static u16 chip_type;
+static u8 vid_value;
 
 /* Many IT87 constants specified below */
 
@@ -131,13 +135,21 @@ static u16 chip_type;
 #define IT87_REG_ALARM2        0x02
 #define IT87_REG_ALARM3        0x03
 
+/* The IT8718F has the VID value in a different register, in Super-I/O
+   configuration space. */
 #define IT87_REG_VID           0x0a
+/* Warning: register 0x0b is used for something completely different in
+   new chips/revisions. I suspect only 16-bit tachometer mode will work
+   for these. */
 #define IT87_REG_FAN_DIV       0x0b
+#define IT87_REG_FAN_16BIT     0x0c
 
 /* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */
 
 #define IT87_REG_FAN(nr)       (0x0d + (nr))
 #define IT87_REG_FAN_MIN(nr)   (0x10 + (nr))
+#define IT87_REG_FANX(nr)      (0x18 + (nr))
+#define IT87_REG_FANX_MIN(nr)  (0x1b + (nr))
 #define IT87_REG_FAN_MAIN_CTRL 0x13
 #define IT87_REG_FAN_CTL       0x14
 #define IT87_REG_PWM(nr)       (0x15 + (nr))
@@ -169,7 +181,16 @@ static inline u8 FAN_TO_REG(long rpm, int div)
 			     254);
 }
 
+static inline u16 FAN16_TO_REG(long rpm)
+{
+	if (rpm == 0)
+		return 0xffff;
+	return SENSORS_LIMIT((1350000 + rpm) / (rpm * 2), 1, 0xfffe);
+}
+
 #define FAN_FROM_REG(val,div) ((val)==0?-1:(val)==255?0:1350000/((val)*(div)))
+/* The divider is fixed to 2 in 16-bit mode */
+#define FAN16_FROM_REG(val) ((val)==0?-1:(val)==0xffff?0:1350000/((val)*2))
 
 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((val)<0?(((val)-500)/1000):\
 					((val)+500)/1000),-128,127))
@@ -181,7 +202,7 @@ static inline u8 FAN_TO_REG(long rpm, int div)
 static int DIV_TO_REG(int val)
 {
 	int answer = 0;
-	while ((val >>= 1) != 0)
+	while (answer < 7 && (val >>= 1))
 		answer++;
 	return answer;
 }
@@ -203,10 +224,11 @@ struct it87_data {
 	unsigned long last_updated;	/* In jiffies */
 
 	u8 in[9];		/* Register value */
-	u8 in_max[9];		/* Register value */
-	u8 in_min[9];		/* Register value */
-	u8 fan[3];		/* Register value */
-	u8 fan_min[3];		/* Register value */
+	u8 in_max[8];		/* Register value */
+	u8 in_min[8];		/* Register value */
+	u8 has_fan;		/* Bitfield, fans enabled */
+	u16 fan[3];		/* Register values, possibly combined */
+	u16 fan_min[3];		/* Register values, possibly combined */
 	u8 temp[3];		/* Register value */
 	u8 temp_high[3];	/* Register value */
 	u8 temp_low[3];		/* Register value */
@@ -545,15 +567,15 @@ static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
 
 	struct i2c_client *client = to_i2c_client(dev);
 	struct it87_data *data = i2c_get_clientdata(client);
-	int val = simple_strtol(buf, NULL, 10);
-	int i, min[3];
+	unsigned long val = simple_strtoul(buf, NULL, 10);
+	int min;
 	u8 old;
 
 	mutex_lock(&data->update_lock);
 	old = it87_read_value(client, IT87_REG_FAN_DIV);
 
-	for (i = 0; i < 3; i++)
-		min[i] = FAN_FROM_REG(data->fan_min[i], DIV_FROM_REG(data->fan_div[i]));
+	/* Save fan min limit */
+	min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr]));
 
 	switch (nr) {
 	case 0:
@@ -573,10 +595,10 @@ static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
 		val |= 0x1 << 6;
 	it87_write_value(client, IT87_REG_FAN_DIV, val);
 
-	for (i = 0; i < 3; i++) {
-		data->fan_min[i]=FAN_TO_REG(min[i], DIV_FROM_REG(data->fan_div[i]));
-		it87_write_value(client, IT87_REG_FAN_MIN(i), data->fan_min[i]);
-	}
+	/* Restore fan min limit */
+	data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
+	it87_write_value(client, IT87_REG_FAN_MIN(nr), data->fan_min[nr]);
+
 	mutex_unlock(&data->update_lock);
 	return count;
 }
@@ -657,6 +679,59 @@ show_pwm_offset(1);
 show_pwm_offset(2);
 show_pwm_offset(3);
 
+/* A different set of callbacks for 16-bit fans */
+static ssize_t show_fan16(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", FAN16_FROM_REG(data->fan[nr]));
+}
+
+static ssize_t show_fan16_min(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", FAN16_FROM_REG(data->fan_min[nr]));
+}
+
+static ssize_t set_fan16_min(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 i2c_client *client = to_i2c_client(dev);
+	struct it87_data *data = i2c_get_clientdata(client);
+	int val = simple_strtol(buf, NULL, 10);
+
+	mutex_lock(&data->update_lock);
+	data->fan_min[nr] = FAN16_TO_REG(val);
+	it87_write_value(client, IT87_REG_FAN_MIN(nr),
+			 data->fan_min[nr] & 0xff);
+	it87_write_value(client, IT87_REG_FANX_MIN(nr),
+			 data->fan_min[nr] >> 8);
+	mutex_unlock(&data->update_lock);
+	return count;
+}
+
+/* We want to use the same sysfs file names as 8-bit fans, but we need
+   different variable names, so we have to use SENSOR_ATTR instead of
+   SENSOR_DEVICE_ATTR. */
+#define show_fan16_offset(offset) \
+static struct sensor_device_attribute sensor_dev_attr_fan##offset##_input16 \
+	= SENSOR_ATTR(fan##offset##_input, S_IRUGO,		\
+		show_fan16, NULL, offset - 1);			\
+static struct sensor_device_attribute sensor_dev_attr_fan##offset##_min16 \
+	= SENSOR_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR,	\
+		show_fan16_min, set_fan16_min, offset - 1)
+
+show_fan16_offset(1);
+show_fan16_offset(2);
+show_fan16_offset(3);
+
 /* Alarms */
 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
 {
@@ -684,8 +759,6 @@ store_vrm_reg(struct device *dev, struct device_attribute *attr, const char *buf
 	return count;
 }
 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
-#define device_create_file_vrm(client) \
-device_create_file(&client->dev, &dev_attr_vrm)
 
 static ssize_t
 show_vid_reg(struct device *dev, struct device_attribute *attr, char *buf)
@@ -694,8 +767,88 @@ show_vid_reg(struct device *dev, struct device_attribute *attr, char *buf)
 	return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm));
 }
 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
-#define device_create_file_vid(client) \
-device_create_file(&client->dev, &dev_attr_cpu0_vid)
+
+static struct attribute *it87_attributes[] = {
+	&sensor_dev_attr_in0_input.dev_attr.attr,
+	&sensor_dev_attr_in1_input.dev_attr.attr,
+	&sensor_dev_attr_in2_input.dev_attr.attr,
+	&sensor_dev_attr_in3_input.dev_attr.attr,
+	&sensor_dev_attr_in4_input.dev_attr.attr,
+	&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_in0_min.dev_attr.attr,
+	&sensor_dev_attr_in1_min.dev_attr.attr,
+	&sensor_dev_attr_in2_min.dev_attr.attr,
+	&sensor_dev_attr_in3_min.dev_attr.attr,
+	&sensor_dev_attr_in4_min.dev_attr.attr,
+	&sensor_dev_attr_in5_min.dev_attr.attr,
+	&sensor_dev_attr_in6_min.dev_attr.attr,
+	&sensor_dev_attr_in7_min.dev_attr.attr,
+	&sensor_dev_attr_in0_max.dev_attr.attr,
+	&sensor_dev_attr_in1_max.dev_attr.attr,
+	&sensor_dev_attr_in2_max.dev_attr.attr,
+	&sensor_dev_attr_in3_max.dev_attr.attr,
+	&sensor_dev_attr_in4_max.dev_attr.attr,
+	&sensor_dev_attr_in5_max.dev_attr.attr,
+	&sensor_dev_attr_in6_max.dev_attr.attr,
+	&sensor_dev_attr_in7_max.dev_attr.attr,
+
+	&sensor_dev_attr_temp1_input.dev_attr.attr,
+	&sensor_dev_attr_temp2_input.dev_attr.attr,
+	&sensor_dev_attr_temp3_input.dev_attr.attr,
+	&sensor_dev_attr_temp1_max.dev_attr.attr,
+	&sensor_dev_attr_temp2_max.dev_attr.attr,
+	&sensor_dev_attr_temp3_max.dev_attr.attr,
+	&sensor_dev_attr_temp1_min.dev_attr.attr,
+	&sensor_dev_attr_temp2_min.dev_attr.attr,
+	&sensor_dev_attr_temp3_min.dev_attr.attr,
+	&sensor_dev_attr_temp1_type.dev_attr.attr,
+	&sensor_dev_attr_temp2_type.dev_attr.attr,
+	&sensor_dev_attr_temp3_type.dev_attr.attr,
+
+	&dev_attr_alarms.attr,
+	NULL
+};
+
+static const struct attribute_group it87_group = {
+	.attrs = it87_attributes,
+};
+
+static struct attribute *it87_attributes_opt[] = {
+	&sensor_dev_attr_fan1_input16.dev_attr.attr,
+	&sensor_dev_attr_fan1_min16.dev_attr.attr,
+	&sensor_dev_attr_fan2_input16.dev_attr.attr,
+	&sensor_dev_attr_fan2_min16.dev_attr.attr,
+	&sensor_dev_attr_fan3_input16.dev_attr.attr,
+	&sensor_dev_attr_fan3_min16.dev_attr.attr,
+
+	&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_fan2_input.dev_attr.attr,
+	&sensor_dev_attr_fan2_min.dev_attr.attr,
+	&sensor_dev_attr_fan2_div.dev_attr.attr,
+	&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_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_vrm.attr,
+	&dev_attr_cpu0_vid.attr,
+	NULL
+};
+
+static const struct attribute_group it87_group_opt = {
+	.attrs = it87_attributes_opt,
+};
 
 /* This function is called when:
      * it87_driver is inserted (when this module is loaded), for each
@@ -721,10 +874,12 @@ static int __init it87_find(unsigned short *address)
 	superio_enter();
 	chip_type = superio_inw(DEVID);
 	if (chip_type != IT8712F_DEVID
+	 && chip_type != IT8716F_DEVID
+	 && chip_type != IT8718F_DEVID
 	 && chip_type != IT8705F_DEVID)
 	 	goto exit;
 
-	superio_select();
+	superio_select(PME);
 	if (!(superio_inb(IT87_ACT_REG) & 0x01)) {
 		pr_info("it87: Device not activated, skipping\n");
 		goto exit;
@@ -740,6 +895,21 @@ static int __init it87_find(unsigned short *address)
 	pr_info("it87: Found IT%04xF chip at 0x%x, revision %d\n",
 		chip_type, *address, superio_inb(DEVREV) & 0x0f);
 
+	/* Read GPIO config and VID value from LDN 7 (GPIO) */
+	if (chip_type != IT8705F_DEVID) {
+		int reg;
+
+		superio_select(GPIO);
+		if (chip_type == it8718)
+			vid_value = superio_inb(IT87_SIO_VID_REG);
+
+		reg = superio_inb(IT87_SIO_PINX2_REG);
+		if (reg & (1 << 0))
+			pr_info("it87: in3 is VCC (+5V)\n");
+		if (reg & (1 << 1))
+			pr_info("it87: in7 is VCCH (+5V Stand-By)\n");
+	}
+
 exit:
 	superio_exit();
 	return err;
@@ -800,8 +970,19 @@ static int it87_detect(struct i2c_adapter *adapter, int address, int kind)
 		i = it87_read_value(new_client, IT87_REG_CHIPID);
 		if (i == 0x90) {
 			kind = it87;
-			if ((is_isa) && (chip_type == IT8712F_DEVID))
-				kind = it8712;
+			if (is_isa) {
+				switch (chip_type) {
+				case IT8712F_DEVID:
+					kind = it8712;
+					break;
+				case IT8716F_DEVID:
+					kind = it8716;
+					break;
+				case IT8718F_DEVID:
+					kind = it8718;
+					break;
+				}
+			}
 		}
 		else {
 			if (kind == 0)
@@ -818,6 +999,10 @@ static int it87_detect(struct i2c_adapter *adapter, int address, int kind)
 		name = "it87";
 	} else if (kind == it8712) {
 		name = "it8712";
+	} else if (kind == it8716) {
+		name = "it8716";
+	} else if (kind == it8718) {
+		name = "it8718";
 	}
 
 	/* Fill in the remaining client fields and put it into the global list */
@@ -842,76 +1027,103 @@ static int it87_detect(struct i2c_adapter *adapter, int address, int kind)
 	it87_init_client(new_client, data);
 
 	/* Register sysfs hooks */
-	data->class_dev = hwmon_device_register(&new_client->dev);
-	if (IS_ERR(data->class_dev)) {
-		err = PTR_ERR(data->class_dev);
+	if ((err = sysfs_create_group(&new_client->dev.kobj, &it87_group)))
 		goto ERROR3;
+
+	/* Do not create fan files for disabled fans */
+	if (data->type == it8716 || data->type == it8718) {
+		/* 16-bit tachometers */
+		if (data->has_fan & (1 << 0)) {
+			if ((err = device_create_file(&new_client->dev,
+			     &sensor_dev_attr_fan1_input16.dev_attr))
+			 || (err = device_create_file(&new_client->dev,
+			     &sensor_dev_attr_fan1_min16.dev_attr)))
+				goto ERROR4;
+		}
+		if (data->has_fan & (1 << 1)) {
+			if ((err = device_create_file(&new_client->dev,
+			     &sensor_dev_attr_fan2_input16.dev_attr))
+			 || (err = device_create_file(&new_client->dev,
+			     &sensor_dev_attr_fan2_min16.dev_attr)))
+				goto ERROR4;
+		}
+		if (data->has_fan & (1 << 2)) {
+			if ((err = device_create_file(&new_client->dev,
+			     &sensor_dev_attr_fan3_input16.dev_attr))
+			 || (err = device_create_file(&new_client->dev,
+			     &sensor_dev_attr_fan3_min16.dev_attr)))
+				goto ERROR4;
+		}
+	} else {
+		/* 8-bit tachometers with clock divider */
+		if (data->has_fan & (1 << 0)) {
+			if ((err = device_create_file(&new_client->dev,
+			     &sensor_dev_attr_fan1_input.dev_attr))
+			 || (err = device_create_file(&new_client->dev,
+			     &sensor_dev_attr_fan1_min.dev_attr))
+			 || (err = device_create_file(&new_client->dev,
+			     &sensor_dev_attr_fan1_div.dev_attr)))
+				goto ERROR4;
+		}
+		if (data->has_fan & (1 << 1)) {
+			if ((err = device_create_file(&new_client->dev,
+			     &sensor_dev_attr_fan2_input.dev_attr))
+			 || (err = device_create_file(&new_client->dev,
+			     &sensor_dev_attr_fan2_min.dev_attr))
+			 || (err = device_create_file(&new_client->dev,
+			     &sensor_dev_attr_fan2_div.dev_attr)))
+				goto ERROR4;
+		}
+		if (data->has_fan & (1 << 2)) {
+			if ((err = device_create_file(&new_client->dev,
+			     &sensor_dev_attr_fan3_input.dev_attr))
+			 || (err = device_create_file(&new_client->dev,
+			     &sensor_dev_attr_fan3_min.dev_attr))
+			 || (err = device_create_file(&new_client->dev,
+			     &sensor_dev_attr_fan3_div.dev_attr)))
+				goto ERROR4;
+		}
 	}
 
-	device_create_file(&new_client->dev, &sensor_dev_attr_in0_input.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_in1_input.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_in2_input.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_in3_input.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_in4_input.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_in5_input.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_in6_input.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_in7_input.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_in8_input.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_in0_min.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_in1_min.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_in2_min.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_in3_min.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_in4_min.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_in5_min.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_in6_min.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_in7_min.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_in0_max.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_in1_max.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_in2_max.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_in3_max.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_in4_max.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_in5_max.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_in6_max.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_in7_max.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_temp1_input.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_temp2_input.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_temp3_input.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_temp1_max.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_temp2_max.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_temp3_max.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_temp1_min.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_temp2_min.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_temp3_min.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_temp1_type.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_temp2_type.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_temp3_type.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_fan1_input.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_fan2_input.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_fan3_input.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_fan1_min.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_fan2_min.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_fan3_min.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_fan1_div.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_fan2_div.dev_attr);
-	device_create_file(&new_client->dev, &sensor_dev_attr_fan3_div.dev_attr);
-	device_create_file(&new_client->dev, &dev_attr_alarms);
 	if (enable_pwm_interface) {
-		device_create_file(&new_client->dev, &sensor_dev_attr_pwm1_enable.dev_attr);
-		device_create_file(&new_client->dev, &sensor_dev_attr_pwm2_enable.dev_attr);
-		device_create_file(&new_client->dev, &sensor_dev_attr_pwm3_enable.dev_attr);
-		device_create_file(&new_client->dev, &sensor_dev_attr_pwm1.dev_attr);
-		device_create_file(&new_client->dev, &sensor_dev_attr_pwm2.dev_attr);
-		device_create_file(&new_client->dev, &sensor_dev_attr_pwm3.dev_attr);
+		if ((err = device_create_file(&new_client->dev,
+		     &sensor_dev_attr_pwm1_enable.dev_attr))
+		 || (err = device_create_file(&new_client->dev,
+		     &sensor_dev_attr_pwm2_enable.dev_attr))
+		 || (err = device_create_file(&new_client->dev,
+		     &sensor_dev_attr_pwm3_enable.dev_attr))
+		 || (err = device_create_file(&new_client->dev,
+		     &sensor_dev_attr_pwm1.dev_attr))
+		 || (err = device_create_file(&new_client->dev,
+		     &sensor_dev_attr_pwm2.dev_attr))
+		 || (err = device_create_file(&new_client->dev,
+		     &sensor_dev_attr_pwm3.dev_attr)))
+			goto ERROR4;
 	}
 
-	if (data->type == it8712) {
+	if (data->type == it8712 || data->type == it8716
+	 || data->type == it8718) {
 		data->vrm = vid_which_vrm();
-		device_create_file_vrm(new_client);
-		device_create_file_vid(new_client);
+		/* VID reading from Super-I/O config space if available */
+		data->vid = vid_value;
+		if ((err = device_create_file(&new_client->dev,
+		     &dev_attr_vrm))
+		 || (err = device_create_file(&new_client->dev,
+		     &dev_attr_cpu0_vid)))
+			goto ERROR4;
+	}
+
+	data->class_dev = hwmon_device_register(&new_client->dev);
+	if (IS_ERR(data->class_dev)) {
+		err = PTR_ERR(data->class_dev);
+		goto ERROR4;
 	}
 
 	return 0;
 
+ERROR4:
+	sysfs_remove_group(&new_client->dev.kobj, &it87_group);
+	sysfs_remove_group(&new_client->dev.kobj, &it87_group_opt);
 ERROR3:
 	i2c_detach_client(new_client);
 ERROR2:
@@ -929,6 +1141,8 @@ static int it87_detach_client(struct i2c_client *client)
 	int err;
 
 	hwmon_device_unregister(data->class_dev);
+	sysfs_remove_group(&client->dev.kobj, &it87_group);
+	sysfs_remove_group(&client->dev.kobj, &it87_group_opt);
 
 	if ((err = i2c_detach_client(client)))
 		return err;
@@ -1045,6 +1259,22 @@ static void it87_init_client(struct i2c_client *client, struct it87_data *data)
 		data->manual_pwm_ctl[i] = 0xff;
 	}
 
+	/* Some chips seem to have default value 0xff for all limit
+	 * registers. For low voltage limits it makes no sense and triggers
+	 * alarms, so change to 0 instead. For high temperature limits, it
+	 * means -1 degree C, which surprisingly doesn't trigger an alarm,
+	 * but is still confusing, so change to 127 degrees C. */
+	for (i = 0; i < 8; i++) {
+		tmp = it87_read_value(client, IT87_REG_VIN_MIN(i));
+		if (tmp == 0xff)
+			it87_write_value(client, IT87_REG_VIN_MIN(i), 0);
+	}
+	for (i = 0; i < 3; i++) {
+		tmp = it87_read_value(client, IT87_REG_TEMP_HIGH(i));
+		if (tmp == 0xff)
+			it87_write_value(client, IT87_REG_TEMP_HIGH(i), 127);
+	}
+
 	/* Check if temperature channnels are reset manually or by some reason */
 	tmp = it87_read_value(client, IT87_REG_TEMP_ENABLE);
 	if ((tmp & 0x3f) == 0) {
@@ -1068,6 +1298,18 @@ static void it87_init_client(struct i2c_client *client, struct it87_data *data)
 		data->fan_main_ctrl |= 0x70;
 		it87_write_value(client, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl);
 	}
+	data->has_fan = (data->fan_main_ctrl >> 4) & 0x07;
+
+	/* Set tachometers to 16-bit mode if needed */
+	if (data->type == it8716 || data->type == it8718) {
+		tmp = it87_read_value(client, IT87_REG_FAN_16BIT);
+		if (~tmp & 0x07 & data->has_fan) {
+			dev_dbg(&client->dev,
+				"Setting fan1-3 to 16-bit mode\n");
+			it87_write_value(client, IT87_REG_FAN_16BIT,
+					 tmp | 0x07);
+		}
+	}
 
 	/* Set current fan mode registers and the default settings for the
 	 * other mode registers */
@@ -1118,18 +1360,26 @@ static struct it87_data *it87_update_device(struct device *dev)
 			data->in_max[i] =
 			    it87_read_value(client, IT87_REG_VIN_MAX(i));
 		}
+		/* in8 (battery) has no limit registers */
 		data->in[8] =
 		    it87_read_value(client, IT87_REG_VIN(8));
-		/* Temperature sensor doesn't have limit registers, set
-		   to min and max value */
-		data->in_min[8] = 0;
-		data->in_max[8] = 255;
 
 		for (i = 0; i < 3; i++) {
-			data->fan[i] =
-			    it87_read_value(client, IT87_REG_FAN(i));
+			/* Skip disabled fans */
+			if (!(data->has_fan & (1 << i)))
+				continue;
+
 			data->fan_min[i] =
 			    it87_read_value(client, IT87_REG_FAN_MIN(i));
+			data->fan[i] = it87_read_value(client,
+				       IT87_REG_FAN(i));
+			/* Add high byte if in 16-bit mode */
+			if (data->type == it8716 || data->type == it8718) {
+				data->fan[i] |= it87_read_value(client,
+						IT87_REG_FANX(i)) << 8;
+				data->fan_min[i] |= it87_read_value(client,
+						IT87_REG_FANX_MIN(i)) << 8;
+			}
 		}
 		for (i = 0; i < 3; i++) {
 			data->temp[i] =
@@ -1140,10 +1390,14 @@ static struct it87_data *it87_update_device(struct device *dev)
 			    it87_read_value(client, IT87_REG_TEMP_LOW(i));
 		}
 
-		i = it87_read_value(client, IT87_REG_FAN_DIV);
-		data->fan_div[0] = i & 0x07;
-		data->fan_div[1] = (i >> 3) & 0x07;
-		data->fan_div[2] = (i & 0x40) ? 3 : 1;
+		/* Newer chips don't have clock dividers */
+		if ((data->has_fan & 0x07) && data->type != it8716
+		 && data->type != it8718) {
+			i = it87_read_value(client, IT87_REG_FAN_DIV);
+			data->fan_div[0] = i & 0x07;
+			data->fan_div[1] = (i >> 3) & 0x07;
+			data->fan_div[2] = (i & 0x40) ? 3 : 1;
+		}
 
 		data->alarms =
 			it87_read_value(client, IT87_REG_ALARM1) |
@@ -1153,9 +1407,11 @@ static struct it87_data *it87_update_device(struct device *dev)
 
 		data->sensor = it87_read_value(client, IT87_REG_TEMP_ENABLE);
 		/* The 8705 does not have VID capability */
-		if (data->type == it8712) {
+		if (data->type == it8712 || data->type == it8716) {
 			data->vid = it87_read_value(client, IT87_REG_VID);
-			data->vid &= 0x1f;
+			/* The older IT8712F revisions had only 5 VID pins,
+			   but we assume it is always safe to read 6 bits. */
+			data->vid &= 0x3f;
 		}
 		data->last_updated = jiffies;
 		data->valid = 1;
@@ -1193,8 +1449,9 @@ static void __exit sm_it87_exit(void)
 }
 
 
-MODULE_AUTHOR("Chris Gauthron <chrisg@0-in.com>");
-MODULE_DESCRIPTION("IT8705F, IT8712F, Sis950 driver");
+MODULE_AUTHOR("Chris Gauthron <chrisg@0-in.com>, "
+	      "Jean Delvare <khali@linux-fr.org>");
+MODULE_DESCRIPTION("IT8705F/8712F/8716F/8718F, 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);