drivers/hwmon/f71882fg.c

/***************************************************************************
 *   Copyright (C) 2006 by Hans Edgington <hans@edgington.nl>              *
 *   Copyright (C) 2007,2008 by Hans de Goede <hdegoede@redhat.com>        *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/

#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/platform_device.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/io.h>
#include <linux/acpi.h>

#define DRVNAME "f71882fg"

#define SIO_F71882FG_LD_HWM	0x04	/* Hardware monitor logical device */
#define SIO_UNLOCK_KEY		0x87	/* Key to enable Super-I/O */
#define SIO_LOCK_KEY		0xAA	/* Key to diasble Super-I/O */

#define SIO_REG_LDSEL		0x07	/* Logical device select */
#define SIO_REG_DEVID		0x20	/* Device ID (2 bytes) */
#define SIO_REG_DEVREV		0x22	/* Device revision */
#define SIO_REG_MANID		0x23	/* Fintek ID (2 bytes) */
#define SIO_REG_ENABLE		0x30	/* Logical device enable */
#define SIO_REG_ADDR		0x60	/* Logical device address (2 bytes) */

#define SIO_FINTEK_ID		0x1934	/* Manufacturers ID */
#define SIO_F71862_ID		0x0601	/* Chipset ID */
#define SIO_F71882_ID		0x0541	/* Chipset ID */
#define SIO_F8000_ID		0x0581	/* Chipset ID */

#define REGION_LENGTH		8
#define ADDR_REG_OFFSET		5
#define DATA_REG_OFFSET		6

#define F71882FG_REG_PECI		0x0A

#define F71882FG_REG_IN_STATUS		0x12 /* f71882fg only */
#define F71882FG_REG_IN_BEEP		0x13 /* f71882fg only */
#define F71882FG_REG_IN(nr)		(0x20  + (nr))
#define F71882FG_REG_IN1_HIGH		0x32 /* f71882fg only */

#define F71882FG_REG_FAN(nr)		(0xA0 + (16 * (nr)))
#define F71882FG_REG_FAN_TARGET(nr)	(0xA2 + (16 * (nr)))
#define F71882FG_REG_FAN_FULL_SPEED(nr)	(0xA4 + (16 * (nr)))
#define F71882FG_REG_FAN_STATUS		0x92
#define F71882FG_REG_FAN_BEEP		0x93

#define F71882FG_REG_TEMP(nr)		(0x70 + 2 * (nr))
#define F71882FG_REG_TEMP_OVT(nr)	(0x80 + 2 * (nr))
#define F71882FG_REG_TEMP_HIGH(nr)	(0x81 + 2 * (nr))
#define F71882FG_REG_TEMP_STATUS	0x62
#define F71882FG_REG_TEMP_BEEP		0x63
#define F71882FG_REG_TEMP_HYST(nr)	(0x6C + (nr))
#define F71882FG_REG_TEMP_TYPE		0x6B
#define F71882FG_REG_TEMP_DIODE_OPEN	0x6F

#define F71882FG_REG_PWM(nr)		(0xA3 + (16 * (nr)))
#define F71882FG_REG_PWM_TYPE		0x94
#define F71882FG_REG_PWM_ENABLE		0x96

#define F71882FG_REG_FAN_HYST(nr)	(0x98 + (nr))

#define F71882FG_REG_POINT_PWM(pwm, point)	(0xAA + (point) + (16 * (pwm)))
#define F71882FG_REG_POINT_TEMP(pwm, point)	(0xA6 + (point) + (16 * (pwm)))
#define F71882FG_REG_POINT_MAPPING(nr)		(0xAF + 16 * (nr))

#define	F71882FG_REG_START		0x01

#define FAN_MIN_DETECT			366 /* Lowest detectable fanspeed */

static unsigned short force_id;
module_param(force_id, ushort, 0);
MODULE_PARM_DESC(force_id, "Override the detected device ID");

enum chips { f71862fg, f71882fg, f8000 };

static const char *f71882fg_names[] = {
	"f71862fg",
	"f71882fg",
	"f8000",
};

static struct platform_device *f71882fg_pdev;

/* Super-I/O Function prototypes */
static inline int superio_inb(int base, int reg);
static inline int superio_inw(int base, int reg);
static inline void superio_enter(int base);
static inline void superio_select(int base, int ld);
static inline void superio_exit(int base);

struct f71882fg_sio_data {
	enum chips type;
};

struct f71882fg_data {
	unsigned short addr;
	enum chips type;
	struct device *hwmon_dev;

	struct mutex update_lock;
	char valid;			/* !=0 if following fields are valid */
	unsigned long last_updated;	/* In jiffies */
	unsigned long last_limits;	/* In jiffies */

	/* Register Values */
	u8	in[9];
	u8	in1_max;
	u8	in_status;
	u8	in_beep;
	u16	fan[4];
	u16	fan_target[4];
	u16	fan_full_speed[4];
	u8	fan_status;
	u8	fan_beep;
	/* Note: all models have only 3 temperature channels, but on some
	   they are addressed as 0-2 and on others as 1-3, so for coding
	   convenience we reserve space for 4 channels */
	u8	temp[4];
	u8	temp_ovt[4];
	u8	temp_high[4];
	u8	temp_hyst[2]; /* 2 hysts stored per reg */
	u8	temp_type[4];
	u8	temp_status;
	u8	temp_beep;
	u8	temp_diode_open;
	u8	pwm[4];
	u8	pwm_enable;
	u8	pwm_auto_point_hyst[2];
	u8	pwm_auto_point_mapping[4];
	u8	pwm_auto_point_pwm[4][5];
	u8	pwm_auto_point_temp[4][4];
};

/* Sysfs in */
static ssize_t show_in(struct device *dev, struct device_attribute *devattr,
	char *buf);
static ssize_t show_in_max(struct device *dev, struct device_attribute
	*devattr, char *buf);
static ssize_t store_in_max(struct device *dev, struct device_attribute
	*devattr, const char *buf, size_t count);
static ssize_t show_in_beep(struct device *dev, struct device_attribute
	*devattr, char *buf);
static ssize_t store_in_beep(struct device *dev, struct device_attribute
	*devattr, const char *buf, size_t count);
static ssize_t show_in_alarm(struct device *dev, struct device_attribute
	*devattr, char *buf);
/* Sysfs Fan */
static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
	char *buf);
static ssize_t show_fan_full_speed(struct device *dev,
	struct device_attribute *devattr, char *buf);
static ssize_t store_fan_full_speed(struct device *dev,
	struct device_attribute *devattr, const char *buf, size_t count);
static ssize_t show_fan_beep(struct device *dev, struct device_attribute
	*devattr, char *buf);
static ssize_t store_fan_beep(struct device *dev, struct device_attribute
	*devattr, const char *buf, size_t count);
static ssize_t show_fan_alarm(struct device *dev, struct device_attribute
	*devattr, char *buf);
/* Sysfs Temp */
static ssize_t show_temp(struct device *dev, struct device_attribute
	*devattr, char *buf);
static ssize_t show_temp_max(struct device *dev, struct device_attribute
	*devattr, char *buf);
static ssize_t store_temp_max(struct device *dev, struct device_attribute
	*devattr, const char *buf, size_t count);
static ssize_t show_temp_max_hyst(struct device *dev, struct device_attribute
	*devattr, char *buf);
static ssize_t store_temp_max_hyst(struct device *dev, struct device_attribute
	*devattr, const char *buf, size_t count);
static ssize_t show_temp_crit(struct device *dev, struct device_attribute
	*devattr, char *buf);
static ssize_t store_temp_crit(struct device *dev, struct device_attribute
	*devattr, const char *buf, size_t count);
static ssize_t show_temp_crit_hyst(struct device *dev, struct device_attribute
	*devattr, char *buf);
static ssize_t show_temp_type(struct device *dev, struct device_attribute
	*devattr, char *buf);
static ssize_t show_temp_beep(struct device *dev, struct device_attribute
	*devattr, char *buf);
static ssize_t store_temp_beep(struct device *dev, struct device_attribute
	*devattr, const char *buf, size_t count);
static ssize_t show_temp_alarm(struct device *dev, struct device_attribute
	*devattr, char *buf);
static ssize_t show_temp_fault(struct device *dev, struct device_attribute
	*devattr, char *buf);
/* PWM and Auto point control */
static ssize_t show_pwm(struct device *dev, struct device_attribute *devattr,
	char *buf);
static ssize_t store_pwm(struct device *dev, struct device_attribute *devattr,
	const char *buf, size_t count);
static ssize_t show_pwm_enable(struct device *dev,
	struct device_attribute *devattr, char *buf);
static ssize_t store_pwm_enable(struct device *dev,
	struct device_attribute	*devattr, const char *buf, size_t count);
static ssize_t show_pwm_interpolate(struct device *dev,
	struct device_attribute *devattr, char *buf);
static ssize_t store_pwm_interpolate(struct device *dev,
	struct device_attribute *devattr, const char *buf, size_t count);
static ssize_t show_pwm_auto_point_channel(struct device *dev,
	struct device_attribute *devattr, char *buf);
static ssize_t store_pwm_auto_point_channel(struct device *dev,
	struct device_attribute *devattr, const char *buf, size_t count);
static ssize_t show_pwm_auto_point_temp_hyst(struct device *dev,
	struct device_attribute *devattr, char *buf);
static ssize_t store_pwm_auto_point_temp_hyst(struct device *dev,
	struct device_attribute *devattr, const char *buf, size_t count);
static ssize_t show_pwm_auto_point_pwm(struct device *dev,
	struct device_attribute *devattr, char *buf);
static ssize_t store_pwm_auto_point_pwm(struct device *dev,
	struct device_attribute *devattr, const char *buf, size_t count);
static ssize_t show_pwm_auto_point_temp(struct device *dev,
	struct device_attribute *devattr, char *buf);
static ssize_t store_pwm_auto_point_temp(struct device *dev,
	struct device_attribute *devattr, const char *buf, size_t count);
/* Sysfs misc */
static ssize_t show_name(struct device *dev, struct device_attribute *devattr,
	char *buf);

static int __devinit f71882fg_probe(struct platform_device * pdev);
static int f71882fg_remove(struct platform_device *pdev);

static struct platform_driver f71882fg_driver = {
	.driver = {
		.owner	= THIS_MODULE,
		.name	= DRVNAME,
	},
	.probe		= f71882fg_probe,
	.remove		= __devexit_p(f71882fg_remove),
};

static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);

/* Temp and in attr common to both the f71862fg and f71882fg */
static struct sensor_device_attribute_2 f718x2fg_in_temp_attr[] = {
	SENSOR_ATTR_2(in0_input, S_IRUGO, show_in, NULL, 0, 0),
	SENSOR_ATTR_2(in1_input, S_IRUGO, show_in, NULL, 0, 1),
	SENSOR_ATTR_2(in2_input, S_IRUGO, show_in, NULL, 0, 2),
	SENSOR_ATTR_2(in3_input, S_IRUGO, show_in, NULL, 0, 3),
	SENSOR_ATTR_2(in4_input, S_IRUGO, show_in, NULL, 0, 4),
	SENSOR_ATTR_2(in5_input, S_IRUGO, show_in, NULL, 0, 5),
	SENSOR_ATTR_2(in6_input, S_IRUGO, show_in, NULL, 0, 6),
	SENSOR_ATTR_2(in7_input, S_IRUGO, show_in, NULL, 0, 7),
	SENSOR_ATTR_2(in8_input, S_IRUGO, show_in, NULL, 0, 8),
	SENSOR_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 1),
	SENSOR_ATTR_2(temp1_max, S_IRUGO|S_IWUSR, show_temp_max,
		store_temp_max, 0, 1),
	SENSOR_ATTR_2(temp1_max_hyst, S_IRUGO|S_IWUSR, show_temp_max_hyst,
		store_temp_max_hyst, 0, 1),
	/* Should really be temp1_max_alarm, but older versions did not handle
	   the max and crit alarms separately and lm_sensors v2 depends on the
	   presence of temp#_alarm files. The same goes for temp2/3 _alarm. */
	SENSOR_ATTR_2(temp1_alarm, S_IRUGO, show_temp_alarm, NULL, 0, 1),
	SENSOR_ATTR_2(temp1_max_beep, S_IRUGO|S_IWUSR, show_temp_beep,
		store_temp_beep, 0, 1),
	SENSOR_ATTR_2(temp1_crit, S_IRUGO|S_IWUSR, show_temp_crit,
		store_temp_crit, 0, 1),
	SENSOR_ATTR_2(temp1_crit_hyst, S_IRUGO, show_temp_crit_hyst, NULL,
		0, 1),
	SENSOR_ATTR_2(temp1_crit_alarm, S_IRUGO, show_temp_alarm, NULL, 0, 5),
	SENSOR_ATTR_2(temp1_crit_beep, S_IRUGO|S_IWUSR, show_temp_beep,
		store_temp_beep, 0, 5),
	SENSOR_ATTR_2(temp1_type, S_IRUGO, show_temp_type, NULL, 0, 1),
	SENSOR_ATTR_2(temp1_fault, S_IRUGO, show_temp_fault, NULL, 0, 1),
	SENSOR_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 0, 2),
	SENSOR_ATTR_2(temp2_max, S_IRUGO|S_IWUSR, show_temp_max,
		store_temp_max, 0, 2),
	SENSOR_ATTR_2(temp2_max_hyst, S_IRUGO|S_IWUSR, show_temp_max_hyst,
		store_temp_max_hyst, 0, 2),
	/* Should be temp2_max_alarm, see temp1_alarm note */
	SENSOR_ATTR_2(temp2_alarm, S_IRUGO, show_temp_alarm, NULL, 0, 2),
	SENSOR_ATTR_2(temp2_max_beep, S_IRUGO|S_IWUSR, show_temp_beep,
		store_temp_beep, 0, 2),
	SENSOR_ATTR_2(temp2_crit, S_IRUGO|S_IWUSR, show_temp_crit,
		store_temp_crit, 0, 2),
	SENSOR_ATTR_2(temp2_crit_hyst, S_IRUGO, show_temp_crit_hyst, NULL,
		0, 2),
	SENSOR_ATTR_2(temp2_crit_alarm, S_IRUGO, show_temp_alarm, NULL, 0, 6),
	SENSOR_ATTR_2(temp2_crit_beep, S_IRUGO|S_IWUSR, show_temp_beep,
		store_temp_beep, 0, 6),
	SENSOR_ATTR_2(temp2_type, S_IRUGO, show_temp_type, NULL, 0, 2),
	SENSOR_ATTR_2(temp2_fault, S_IRUGO, show_temp_fault, NULL, 0, 2),
	SENSOR_ATTR_2(temp3_input, S_IRUGO, show_temp, NULL, 0, 3),
	SENSOR_ATTR_2(temp3_max, S_IRUGO|S_IWUSR, show_temp_max,
		store_temp_max, 0, 3),
	SENSOR_ATTR_2(temp3_max_hyst, S_IRUGO|S_IWUSR, show_temp_max_hyst,
		store_temp_max_hyst, 0, 3),
	/* Should be temp3_max_alarm, see temp1_alarm note */
	SENSOR_ATTR_2(temp3_alarm, S_IRUGO, show_temp_alarm, NULL, 0, 3),
	SENSOR_ATTR_2(temp3_max_beep, S_IRUGO|S_IWUSR, show_temp_beep,
		store_temp_beep, 0, 3),
	SENSOR_ATTR_2(temp3_crit, S_IRUGO|S_IWUSR, show_temp_crit,
		store_temp_crit, 0, 3),
	SENSOR_ATTR_2(temp3_crit_hyst, S_IRUGO, show_temp_crit_hyst, NULL,
		0, 3),
	SENSOR_ATTR_2(temp3_crit_alarm, S_IRUGO, show_temp_alarm, NULL, 0, 7),
	SENSOR_ATTR_2(temp3_crit_beep, S_IRUGO|S_IWUSR, show_temp_beep,
		store_temp_beep, 0, 7),
	SENSOR_ATTR_2(temp3_type, S_IRUGO, show_temp_type, NULL, 0, 3),
	SENSOR_ATTR_2(temp3_fault, S_IRUGO, show_temp_fault, NULL, 0, 3),
};

/* Temp and in attr found only on the f71882fg */
static struct sensor_device_attribute_2 f71882fg_in_temp_attr[] = {
	SENSOR_ATTR_2(in1_max, S_IRUGO|S_IWUSR, show_in_max, store_in_max,
		0, 1),
	SENSOR_ATTR_2(in1_beep, S_IRUGO|S_IWUSR, show_in_beep, store_in_beep,
		0, 1),
	SENSOR_ATTR_2(in1_alarm, S_IRUGO, show_in_alarm, NULL, 0, 1),
};

/* Temp and in attr for the f8000
   Note on the f8000 temp_ovt (crit) is used as max, and temp_high (max)
   is used as hysteresis value to clear alarms
 */
static struct sensor_device_attribute_2 f8000_in_temp_attr[] = {
	SENSOR_ATTR_2(in0_input, S_IRUGO, show_in, NULL, 0, 0),
	SENSOR_ATTR_2(in1_input, S_IRUGO, show_in, NULL, 0, 1),
	SENSOR_ATTR_2(in2_input, S_IRUGO, show_in, NULL, 0, 2),
	SENSOR_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 0),
	SENSOR_ATTR_2(temp1_max, S_IRUGO|S_IWUSR, show_temp_crit,
		store_temp_crit, 0, 0),
	SENSOR_ATTR_2(temp1_max_hyst, S_IRUGO|S_IWUSR, show_temp_max,
		store_temp_max, 0, 0),
	SENSOR_ATTR_2(temp1_alarm, S_IRUGO, show_temp_alarm, NULL, 0, 4),
	SENSOR_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 0, 1),
	SENSOR_ATTR_2(temp2_max, S_IRUGO|S_IWUSR, show_temp_crit,
		store_temp_crit, 0, 1),
	SENSOR_ATTR_2(temp2_max_hyst, S_IRUGO|S_IWUSR, show_temp_max,
		store_temp_max, 0, 1),
	SENSOR_ATTR_2(temp2_alarm, S_IRUGO, show_temp_alarm, NULL, 0, 5),
	SENSOR_ATTR_2(temp2_type, S_IRUGO, show_temp_type, NULL, 0, 1),
	SENSOR_ATTR_2(temp3_input, S_IRUGO, show_temp, NULL, 0, 2),
	SENSOR_ATTR_2(temp3_max, S_IRUGO|S_IWUSR, show_temp_crit,
		store_temp_crit, 0, 2),
	SENSOR_ATTR_2(temp3_max_hyst, S_IRUGO|S_IWUSR, show_temp_max,
		store_temp_max, 0, 2),
	SENSOR_ATTR_2(temp3_alarm, S_IRUGO, show_temp_alarm, NULL, 0, 6),
};

/* Fan / PWM attr common to all models */
static struct sensor_device_attribute_2 fxxxx_fan_attr[] = {
	SENSOR_ATTR_2(fan1_input, S_IRUGO, show_fan, NULL, 0, 0),
	SENSOR_ATTR_2(fan1_full_speed, S_IRUGO|S_IWUSR,
		      show_fan_full_speed,
		      store_fan_full_speed, 0, 0),
	SENSOR_ATTR_2(fan1_alarm, S_IRUGO, show_fan_alarm, NULL, 0, 0),
	SENSOR_ATTR_2(fan2_input, S_IRUGO, show_fan, NULL, 0, 1),
	SENSOR_ATTR_2(fan2_full_speed, S_IRUGO|S_IWUSR,
		      show_fan_full_speed,
		      store_fan_full_speed, 0, 1),
	SENSOR_ATTR_2(fan2_alarm, S_IRUGO, show_fan_alarm, NULL, 0, 1),
	SENSOR_ATTR_2(fan3_input, S_IRUGO, show_fan, NULL, 0, 2),
	SENSOR_ATTR_2(fan3_full_speed, S_IRUGO|S_IWUSR,
		      show_fan_full_speed,
		      store_fan_full_speed, 0, 2),
	SENSOR_ATTR_2(fan3_alarm, S_IRUGO, show_fan_alarm, NULL, 0, 2),

	SENSOR_ATTR_2(pwm1, S_IRUGO|S_IWUSR, show_pwm, store_pwm, 0, 0),
	SENSOR_ATTR_2(pwm1_enable, S_IRUGO|S_IWUSR, show_pwm_enable,
		      store_pwm_enable, 0, 0),
	SENSOR_ATTR_2(pwm1_interpolate, S_IRUGO|S_IWUSR,
		      show_pwm_interpolate, store_pwm_interpolate, 0, 0),
	SENSOR_ATTR_2(pwm1_auto_channels_temp, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_channel,
		      store_pwm_auto_point_channel, 0, 0),

	SENSOR_ATTR_2(pwm2, S_IRUGO|S_IWUSR, show_pwm, store_pwm, 0, 1),
	SENSOR_ATTR_2(pwm2_enable, S_IRUGO|S_IWUSR, show_pwm_enable,
		      store_pwm_enable, 0, 1),
	SENSOR_ATTR_2(pwm2_interpolate, S_IRUGO|S_IWUSR,
		      show_pwm_interpolate, store_pwm_interpolate, 0, 1),
	SENSOR_ATTR_2(pwm2_auto_channels_temp, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_channel,
		      store_pwm_auto_point_channel, 0, 1),

	SENSOR_ATTR_2(pwm3_interpolate, S_IRUGO|S_IWUSR,
		      show_pwm_interpolate, store_pwm_interpolate, 0, 2),
	SENSOR_ATTR_2(pwm3_auto_channels_temp, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_channel,
		      store_pwm_auto_point_channel, 0, 2),
};

/* Fan / PWM attr for the f71862fg, less pwms and less zones per pwm than the
   f71882fg */
static struct sensor_device_attribute_2 f71862fg_fan_attr[] = {
	SENSOR_ATTR_2(fan1_beep, S_IRUGO|S_IWUSR, show_fan_beep,
		store_fan_beep, 0, 0),
	SENSOR_ATTR_2(fan2_beep, S_IRUGO|S_IWUSR, show_fan_beep,
		store_fan_beep, 0, 1),
	SENSOR_ATTR_2(fan3_beep, S_IRUGO|S_IWUSR, show_fan_beep,
		store_fan_beep, 0, 2),

	SENSOR_ATTR_2(pwm1_auto_point1_pwm, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_pwm, store_pwm_auto_point_pwm,
		      1, 0),
	SENSOR_ATTR_2(pwm1_auto_point2_pwm, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_pwm, store_pwm_auto_point_pwm,
		      4, 0),
	SENSOR_ATTR_2(pwm1_auto_point1_temp, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_temp, store_pwm_auto_point_temp,
		      0, 0),
	SENSOR_ATTR_2(pwm1_auto_point2_temp, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_temp, store_pwm_auto_point_temp,
		      3, 0),
	SENSOR_ATTR_2(pwm1_auto_point1_temp_hyst, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_temp_hyst,
		      store_pwm_auto_point_temp_hyst,
		      0, 0),
	SENSOR_ATTR_2(pwm1_auto_point2_temp_hyst, S_IRUGO,
		      show_pwm_auto_point_temp_hyst, NULL, 3, 0),

	SENSOR_ATTR_2(pwm2_auto_point1_pwm, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_pwm, store_pwm_auto_point_pwm,
		      1, 1),
	SENSOR_ATTR_2(pwm2_auto_point2_pwm, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_pwm, store_pwm_auto_point_pwm,
		      4, 1),
	SENSOR_ATTR_2(pwm2_auto_point1_temp, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_temp, store_pwm_auto_point_temp,
		      0, 1),
	SENSOR_ATTR_2(pwm2_auto_point2_temp, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_temp, store_pwm_auto_point_temp,
		      3, 1),
	SENSOR_ATTR_2(pwm2_auto_point1_temp_hyst, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_temp_hyst,
		      store_pwm_auto_point_temp_hyst,
		      0, 1),
	SENSOR_ATTR_2(pwm2_auto_point2_temp_hyst, S_IRUGO,
		      show_pwm_auto_point_temp_hyst, NULL, 3, 1),

	SENSOR_ATTR_2(pwm3, S_IRUGO|S_IWUSR, show_pwm, store_pwm, 0, 2),
	SENSOR_ATTR_2(pwm3_enable, S_IRUGO|S_IWUSR, show_pwm_enable,
		      store_pwm_enable, 0, 2),
	SENSOR_ATTR_2(pwm3_auto_point1_pwm, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_pwm, store_pwm_auto_point_pwm,
		      1, 2),
	SENSOR_ATTR_2(pwm3_auto_point2_pwm, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_pwm, store_pwm_auto_point_pwm,
		      4, 2),
	SENSOR_ATTR_2(pwm3_auto_point1_temp, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_temp, store_pwm_auto_point_temp,
		      0, 2),
	SENSOR_ATTR_2(pwm3_auto_point2_temp, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_temp, store_pwm_auto_point_temp,
		      3, 2),
	SENSOR_ATTR_2(pwm3_auto_point1_temp_hyst, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_temp_hyst,
		      store_pwm_auto_point_temp_hyst,
		      0, 2),
	SENSOR_ATTR_2(pwm3_auto_point2_temp_hyst, S_IRUGO,
		      show_pwm_auto_point_temp_hyst, NULL, 3, 2),
};

/* Fan / PWM attr for the f71882fg */
static struct sensor_device_attribute_2 f71882fg_fan_attr[] = {
	SENSOR_ATTR_2(fan1_beep, S_IRUGO|S_IWUSR, show_fan_beep,
		store_fan_beep, 0, 0),
	SENSOR_ATTR_2(fan2_beep, S_IRUGO|S_IWUSR, show_fan_beep,
		store_fan_beep, 0, 1),
	SENSOR_ATTR_2(fan3_beep, S_IRUGO|S_IWUSR, show_fan_beep,
		store_fan_beep, 0, 2),
	SENSOR_ATTR_2(fan4_input, S_IRUGO, show_fan, NULL, 0, 3),
	SENSOR_ATTR_2(fan4_full_speed, S_IRUGO|S_IWUSR,
		      show_fan_full_speed,
		      store_fan_full_speed, 0, 3),
	SENSOR_ATTR_2(fan4_beep, S_IRUGO|S_IWUSR, show_fan_beep,
		store_fan_beep, 0, 3),
	SENSOR_ATTR_2(fan4_alarm, S_IRUGO, show_fan_alarm, NULL, 0, 3),

	SENSOR_ATTR_2(pwm1_auto_point1_pwm, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_pwm, store_pwm_auto_point_pwm,
		      0, 0),
	SENSOR_ATTR_2(pwm1_auto_point2_pwm, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_pwm, store_pwm_auto_point_pwm,
		      1, 0),
	SENSOR_ATTR_2(pwm1_auto_point3_pwm, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_pwm, store_pwm_auto_point_pwm,
		      2, 0),
	SENSOR_ATTR_2(pwm1_auto_point4_pwm, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_pwm, store_pwm_auto_point_pwm,
		      3, 0),
	SENSOR_ATTR_2(pwm1_auto_point5_pwm, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_pwm, store_pwm_auto_point_pwm,
		      4, 0),
	SENSOR_ATTR_2(pwm1_auto_point1_temp, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_temp, store_pwm_auto_point_temp,
		      0, 0),
	SENSOR_ATTR_2(pwm1_auto_point2_temp, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_temp, store_pwm_auto_point_temp,
		      1, 0),
	SENSOR_ATTR_2(pwm1_auto_point3_temp, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_temp, store_pwm_auto_point_temp,
		      2, 0),
	SENSOR_ATTR_2(pwm1_auto_point4_temp, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_temp, store_pwm_auto_point_temp,
		      3, 0),
	SENSOR_ATTR_2(pwm1_auto_point1_temp_hyst, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_temp_hyst,
		      store_pwm_auto_point_temp_hyst,
		      0, 0),
	SENSOR_ATTR_2(pwm1_auto_point2_temp_hyst, S_IRUGO,
		      show_pwm_auto_point_temp_hyst, NULL, 1, 0),
	SENSOR_ATTR_2(pwm1_auto_point3_temp_hyst, S_IRUGO,
		      show_pwm_auto_point_temp_hyst, NULL, 2, 0),
	SENSOR_ATTR_2(pwm1_auto_point4_temp_hyst, S_IRUGO,
		      show_pwm_auto_point_temp_hyst, NULL, 3, 0),

	SENSOR_ATTR_2(pwm2_auto_point1_pwm, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_pwm, store_pwm_auto_point_pwm,
		      0, 1),
	SENSOR_ATTR_2(pwm2_auto_point2_pwm, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_pwm, store_pwm_auto_point_pwm,
		      1, 1),
	SENSOR_ATTR_2(pwm2_auto_point3_pwm, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_pwm, store_pwm_auto_point_pwm,
		      2, 1),
	SENSOR_ATTR_2(pwm2_auto_point4_pwm, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_pwm, store_pwm_auto_point_pwm,
		      3, 1),
	SENSOR_ATTR_2(pwm2_auto_point5_pwm, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_pwm, store_pwm_auto_point_pwm,
		      4, 1),
	SENSOR_ATTR_2(pwm2_auto_point1_temp, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_temp, store_pwm_auto_point_temp,
		      0, 1),
	SENSOR_ATTR_2(pwm2_auto_point2_temp, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_temp, store_pwm_auto_point_temp,
		      1, 1),
	SENSOR_ATTR_2(pwm2_auto_point3_temp, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_temp, store_pwm_auto_point_temp,
		      2, 1),
	SENSOR_ATTR_2(pwm2_auto_point4_temp, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_temp, store_pwm_auto_point_temp,
		      3, 1),
	SENSOR_ATTR_2(pwm2_auto_point1_temp_hyst, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_temp_hyst,
		      store_pwm_auto_point_temp_hyst,
		      0, 1),
	SENSOR_ATTR_2(pwm2_auto_point2_temp_hyst, S_IRUGO,
		      show_pwm_auto_point_temp_hyst, NULL, 1, 1),
	SENSOR_ATTR_2(pwm2_auto_point3_temp_hyst, S_IRUGO,
		      show_pwm_auto_point_temp_hyst, NULL, 2, 1),
	SENSOR_ATTR_2(pwm2_auto_point4_temp_hyst, S_IRUGO,
		      show_pwm_auto_point_temp_hyst, NULL, 3, 1),

	SENSOR_ATTR_2(pwm3, S_IRUGO|S_IWUSR, show_pwm, store_pwm, 0, 2),
	SENSOR_ATTR_2(pwm3_enable, S_IRUGO|S_IWUSR, show_pwm_enable,
		      store_pwm_enable, 0, 2),
	SENSOR_ATTR_2(pwm3_auto_point1_pwm, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_pwm, store_pwm_auto_point_pwm,
		      0, 2),
	SENSOR_ATTR_2(pwm3_auto_point2_pwm, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_pwm, store_pwm_auto_point_pwm,
		      1, 2),
	SENSOR_ATTR_2(pwm3_auto_point3_pwm, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_pwm, store_pwm_auto_point_pwm,
		      2, 2),
	SENSOR_ATTR_2(pwm3_auto_point4_pwm, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_pwm, store_pwm_auto_point_pwm,
		      3, 2),
	SENSOR_ATTR_2(pwm3_auto_point5_pwm, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_pwm, store_pwm_auto_point_pwm,
		      4, 2),
	SENSOR_ATTR_2(pwm3_auto_point1_temp, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_temp, store_pwm_auto_point_temp,
		      0, 2),
	SENSOR_ATTR_2(pwm3_auto_point2_temp, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_temp, store_pwm_auto_point_temp,
		      1, 2),
	SENSOR_ATTR_2(pwm3_auto_point3_temp, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_temp, store_pwm_auto_point_temp,
		      2, 2),
	SENSOR_ATTR_2(pwm3_auto_point4_temp, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_temp, store_pwm_auto_point_temp,
		      3, 2),
	SENSOR_ATTR_2(pwm3_auto_point1_temp_hyst, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_temp_hyst,
		      store_pwm_auto_point_temp_hyst,
		      0, 2),
	SENSOR_ATTR_2(pwm3_auto_point2_temp_hyst, S_IRUGO,
		      show_pwm_auto_point_temp_hyst, NULL, 1, 2),
	SENSOR_ATTR_2(pwm3_auto_point3_temp_hyst, S_IRUGO,
		      show_pwm_auto_point_temp_hyst, NULL, 2, 2),
	SENSOR_ATTR_2(pwm3_auto_point4_temp_hyst, S_IRUGO,
		      show_pwm_auto_point_temp_hyst, NULL, 3, 2),

	SENSOR_ATTR_2(pwm4, S_IRUGO|S_IWUSR, show_pwm, store_pwm, 0, 3),
	SENSOR_ATTR_2(pwm4_enable, S_IRUGO|S_IWUSR, show_pwm_enable,
		      store_pwm_enable, 0, 3),
	SENSOR_ATTR_2(pwm4_interpolate, S_IRUGO|S_IWUSR,
		      show_pwm_interpolate, store_pwm_interpolate, 0, 3),
	SENSOR_ATTR_2(pwm4_auto_channels_temp, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_channel,
		      store_pwm_auto_point_channel, 0, 3),
	SENSOR_ATTR_2(pwm4_auto_point1_pwm, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_pwm, store_pwm_auto_point_pwm,
		      0, 3),
	SENSOR_ATTR_2(pwm4_auto_point2_pwm, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_pwm, store_pwm_auto_point_pwm,
		      1, 3),
	SENSOR_ATTR_2(pwm4_auto_point3_pwm, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_pwm, store_pwm_auto_point_pwm,
		      2, 3),
	SENSOR_ATTR_2(pwm4_auto_point4_pwm, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_pwm, store_pwm_auto_point_pwm,
		      3, 3),
	SENSOR_ATTR_2(pwm4_auto_point5_pwm, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_pwm, store_pwm_auto_point_pwm,
		      4, 3),
	SENSOR_ATTR_2(pwm4_auto_point1_temp, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_temp, store_pwm_auto_point_temp,
		      0, 3),
	SENSOR_ATTR_2(pwm4_auto_point2_temp, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_temp, store_pwm_auto_point_temp,
		      1, 3),
	SENSOR_ATTR_2(pwm4_auto_point3_temp, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_temp, store_pwm_auto_point_temp,
		      2, 3),
	SENSOR_ATTR_2(pwm4_auto_point4_temp, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_temp, store_pwm_auto_point_temp,
		      3, 3),
	SENSOR_ATTR_2(pwm4_auto_point1_temp_hyst, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_temp_hyst,
		      store_pwm_auto_point_temp_hyst,
		      0, 3),
	SENSOR_ATTR_2(pwm4_auto_point2_temp_hyst, S_IRUGO,
		      show_pwm_auto_point_temp_hyst, NULL, 1, 3),
	SENSOR_ATTR_2(pwm4_auto_point3_temp_hyst, S_IRUGO,
		      show_pwm_auto_point_temp_hyst, NULL, 2, 3),
	SENSOR_ATTR_2(pwm4_auto_point4_temp_hyst, S_IRUGO,
		      show_pwm_auto_point_temp_hyst, NULL, 3, 3),
};

/* Fan / PWM attr for the f8000, zones mapped to temp instead of to pwm!
   Also the register block at offset A0 maps to TEMP1 (so our temp2, as the
   F8000 starts counting temps at 0), B0 maps the TEMP2 and C0 maps to TEMP0 */
static struct sensor_device_attribute_2 f8000_fan_attr[] = {
	SENSOR_ATTR_2(fan4_input, S_IRUGO, show_fan, NULL, 0, 3),

	SENSOR_ATTR_2(pwm3, S_IRUGO, show_pwm, NULL, 0, 2),

	SENSOR_ATTR_2(temp1_auto_point1_pwm, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_pwm, store_pwm_auto_point_pwm,
		      0, 2),
	SENSOR_ATTR_2(temp1_auto_point2_pwm, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_pwm, store_pwm_auto_point_pwm,
		      1, 2),
	SENSOR_ATTR_2(temp1_auto_point3_pwm, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_pwm, store_pwm_auto_point_pwm,
		      2, 2),
	SENSOR_ATTR_2(temp1_auto_point4_pwm, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_pwm, store_pwm_auto_point_pwm,
		      3, 2),
	SENSOR_ATTR_2(temp1_auto_point5_pwm, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_pwm, store_pwm_auto_point_pwm,
		      4, 2),
	SENSOR_ATTR_2(temp1_auto_point1_temp, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_temp, store_pwm_auto_point_temp,
		      0, 2),
	SENSOR_ATTR_2(temp1_auto_point2_temp, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_temp, store_pwm_auto_point_temp,
		      1, 2),
	SENSOR_ATTR_2(temp1_auto_point3_temp, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_temp, store_pwm_auto_point_temp,
		      2, 2),
	SENSOR_ATTR_2(temp1_auto_point4_temp, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_temp, store_pwm_auto_point_temp,
		      3, 2),
	SENSOR_ATTR_2(temp1_auto_point1_temp_hyst, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_temp_hyst,
		      store_pwm_auto_point_temp_hyst,
		      0, 2),
	SENSOR_ATTR_2(temp1_auto_point2_temp_hyst, S_IRUGO,
		      show_pwm_auto_point_temp_hyst, NULL, 1, 2),
	SENSOR_ATTR_2(temp1_auto_point3_temp_hyst, S_IRUGO,
		      show_pwm_auto_point_temp_hyst, NULL, 2, 2),
	SENSOR_ATTR_2(temp1_auto_point4_temp_hyst, S_IRUGO,
		      show_pwm_auto_point_temp_hyst, NULL, 3, 2),

	SENSOR_ATTR_2(temp2_auto_point1_pwm, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_pwm, store_pwm_auto_point_pwm,
		      0, 0),
	SENSOR_ATTR_2(temp2_auto_point2_pwm, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_pwm, store_pwm_auto_point_pwm,
		      1, 0),
	SENSOR_ATTR_2(temp2_auto_point3_pwm, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_pwm, store_pwm_auto_point_pwm,
		      2, 0),
	SENSOR_ATTR_2(temp2_auto_point4_pwm, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_pwm, store_pwm_auto_point_pwm,
		      3, 0),
	SENSOR_ATTR_2(temp2_auto_point5_pwm, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_pwm, store_pwm_auto_point_pwm,
		      4, 0),
	SENSOR_ATTR_2(temp2_auto_point1_temp, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_temp, store_pwm_auto_point_temp,
		      0, 0),
	SENSOR_ATTR_2(temp2_auto_point2_temp, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_temp, store_pwm_auto_point_temp,
		      1, 0),
	SENSOR_ATTR_2(temp2_auto_point3_temp, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_temp, store_pwm_auto_point_temp,
		      2, 0),
	SENSOR_ATTR_2(temp2_auto_point4_temp, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_temp, store_pwm_auto_point_temp,
		      3, 0),
	SENSOR_ATTR_2(temp2_auto_point1_temp_hyst, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_temp_hyst,
		      store_pwm_auto_point_temp_hyst,
		      0, 0),
	SENSOR_ATTR_2(temp2_auto_point2_temp_hyst, S_IRUGO,
		      show_pwm_auto_point_temp_hyst, NULL, 1, 0),
	SENSOR_ATTR_2(temp2_auto_point3_temp_hyst, S_IRUGO,
		      show_pwm_auto_point_temp_hyst, NULL, 2, 0),
	SENSOR_ATTR_2(temp2_auto_point4_temp_hyst, S_IRUGO,
		      show_pwm_auto_point_temp_hyst, NULL, 3, 0),

	SENSOR_ATTR_2(temp3_auto_point1_pwm, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_pwm, store_pwm_auto_point_pwm,
		      0, 1),
	SENSOR_ATTR_2(temp3_auto_point2_pwm, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_pwm, store_pwm_auto_point_pwm,
		      1, 1),
	SENSOR_ATTR_2(temp3_auto_point3_pwm, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_pwm, store_pwm_auto_point_pwm,
		      2, 1),
	SENSOR_ATTR_2(temp3_auto_point4_pwm, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_pwm, store_pwm_auto_point_pwm,
		      3, 1),
	SENSOR_ATTR_2(temp3_auto_point5_pwm, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_pwm, store_pwm_auto_point_pwm,
		      4, 1),
	SENSOR_ATTR_2(temp3_auto_point1_temp, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_temp, store_pwm_auto_point_temp,
		      0, 1),
	SENSOR_ATTR_2(temp3_auto_point2_temp, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_temp, store_pwm_auto_point_temp,
		      1, 1),
	SENSOR_ATTR_2(temp3_auto_point3_temp, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_temp, store_pwm_auto_point_temp,
		      2, 1),
	SENSOR_ATTR_2(temp3_auto_point4_temp, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_temp, store_pwm_auto_point_temp,
		      3, 1),
	SENSOR_ATTR_2(temp3_auto_point1_temp_hyst, S_IRUGO|S_IWUSR,
		      show_pwm_auto_point_temp_hyst,
		      store_pwm_auto_point_temp_hyst,
		      0, 1),
	SENSOR_ATTR_2(temp3_auto_point2_temp_hyst, S_IRUGO,
		      show_pwm_auto_point_temp_hyst, NULL, 1, 1),
	SENSOR_ATTR_2(temp3_auto_point3_temp_hyst, S_IRUGO,
		      show_pwm_auto_point_temp_hyst, NULL, 2, 1),
	SENSOR_ATTR_2(temp3_auto_point4_temp_hyst, S_IRUGO,
		      show_pwm_auto_point_temp_hyst, NULL, 3, 1),
};

/* Super I/O functions */
static inline int superio_inb(int base, int reg)
{
	outb(reg, base);
	return inb(base + 1);
}

static int superio_inw(int base, int reg)
{
	int val;
	outb(reg++, base);
	val = inb(base + 1) << 8;
	outb(reg, base);
	val |= inb(base + 1);
	return val;
}

static inline void superio_enter(int base)
{
	/* according to the datasheet the key must be send twice! */
	outb( SIO_UNLOCK_KEY, base);
	outb( SIO_UNLOCK_KEY, base);
}

static inline void superio_select( int base, int ld)
{
	outb(SIO_REG_LDSEL, base);
	outb(ld, base + 1);
}

static inline void superio_exit(int base)
{
	outb(SIO_LOCK_KEY, base);
}

static inline int fan_from_reg(u16 reg)
{
	return reg ? (1500000 / reg) : 0;
}

static inline u16 fan_to_reg(int fan)
{
	return fan ? (1500000 / fan) : 0;
}

static u8 f71882fg_read8(struct f71882fg_data *data, u8 reg)
{
	u8 val;

	outb(reg, data->addr + ADDR_REG_OFFSET);
	val = inb(data->addr + DATA_REG_OFFSET);

	return val;
}

static u16 f71882fg_read16(struct f71882fg_data *data, u8 reg)
{
	u16 val;

	outb(reg++, data->addr + ADDR_REG_OFFSET);
	val = inb(data->addr + DATA_REG_OFFSET) << 8;
	outb(reg, data->addr + ADDR_REG_OFFSET);
	val |= inb(data->addr + DATA_REG_OFFSET);

	return val;
}

static void f71882fg_write8(struct f71882fg_data *data, u8 reg, u8 val)
{
	outb(reg, data->addr + ADDR_REG_OFFSET);
	outb(val, data->addr + DATA_REG_OFFSET);
}

static void f71882fg_write16(struct f71882fg_data *data, u8 reg, u16 val)
{
	outb(reg++, data->addr + ADDR_REG_OFFSET);
	outb(val >> 8, data->addr + DATA_REG_OFFSET);
	outb(reg, data->addr + ADDR_REG_OFFSET);
	outb(val & 255, data->addr + DATA_REG_OFFSET);
}

static struct f71882fg_data *f71882fg_update_device(struct device *dev)
{
	struct f71882fg_data *data = dev_get_drvdata(dev);
	int nr, reg = 0, reg2;
	int nr_fans = (data->type == f71882fg) ? 4 : 3;
	int nr_ins = (data->type == f8000) ? 3 : 9;
	int temp_start = (data->type == f8000) ? 0 : 1;

	mutex_lock(&data->update_lock);

	/* Update once every 60 seconds */
	if ( time_after(jiffies, data->last_limits + 60 * HZ ) ||
			!data->valid) {
		if (data->type == f71882fg) {
			data->in1_max =
				f71882fg_read8(data, F71882FG_REG_IN1_HIGH);
			data->in_beep =
				f71882fg_read8(data, F71882FG_REG_IN_BEEP);
		}

		/* Get High & boundary temps*/
		for (nr = temp_start; nr < 3 + temp_start; nr++) {
			data->temp_ovt[nr] = f71882fg_read8(data,
						F71882FG_REG_TEMP_OVT(nr));
			data->temp_high[nr] = f71882fg_read8(data,
						F71882FG_REG_TEMP_HIGH(nr));
		}

		if (data->type != f8000) {
			data->fan_beep = f71882fg_read8(data,
						F71882FG_REG_FAN_BEEP);
			data->temp_beep = f71882fg_read8(data,
						F71882FG_REG_TEMP_BEEP);
			data->temp_hyst[0] = f71882fg_read8(data,
						F71882FG_REG_TEMP_HYST(0));
			data->temp_hyst[1] = f71882fg_read8(data,
						F71882FG_REG_TEMP_HYST(1));
			/* Have to hardcode type, because temp1 is special */
			reg  = f71882fg_read8(data, F71882FG_REG_TEMP_TYPE);
			data->temp_type[2] = (reg & 0x04) ? 2 : 4;
			data->temp_type[3] = (reg & 0x08) ? 2 : 4;
		}
		reg2 = f71882fg_read8(data, F71882FG_REG_PECI);
		if ((reg2 & 0x03) == 0x01)
			data->temp_type[1] = 6 /* PECI */;
		else if ((reg2 & 0x03) == 0x02)
			data->temp_type[1] = 5 /* AMDSI */;
		else if (data->type != f8000)
			data->temp_type[1] = (reg & 0x02) ? 2 : 4;
		else
			data->temp_type[1] = 2; /* F8000 only supports BJT */

		data->pwm_enable = f71882fg_read8(data,
						  F71882FG_REG_PWM_ENABLE);
		data->pwm_auto_point_hyst[0] =
			f71882fg_read8(data, F71882FG_REG_FAN_HYST(0));
		data->pwm_auto_point_hyst[1] =
			f71882fg_read8(data, F71882FG_REG_FAN_HYST(1));

		for (nr = 0; nr < nr_fans; nr++) {
			data->pwm_auto_point_mapping[nr] =
			    f71882fg_read8(data,
					   F71882FG_REG_POINT_MAPPING(nr));

			if (data->type != f71862fg) {
				int point;
				for (point = 0; point < 5; point++) {
					data->pwm_auto_point_pwm[nr][point] =
						f71882fg_read8(data,
							F71882FG_REG_POINT_PWM
							(nr, point));
				}
				for (point = 0; point < 4; point++) {
					data->pwm_auto_point_temp[nr][point] =
						f71882fg_read8(data,
							F71882FG_REG_POINT_TEMP
							(nr, point));
				}
			} else {
				data->pwm_auto_point_pwm[nr][1] =
					f71882fg_read8(data,
						F71882FG_REG_POINT_PWM
						(nr, 1));
				data->pwm_auto_point_pwm[nr][4] =
					f71882fg_read8(data,
						F71882FG_REG_POINT_PWM
						(nr, 4));
				data->pwm_auto_point_temp[nr][0] =
					f71882fg_read8(data,
						F71882FG_REG_POINT_TEMP
						(nr, 0));
				data->pwm_auto_point_temp[nr][3] =
					f71882fg_read8(data,
						F71882FG_REG_POINT_TEMP
						(nr, 3));
			}
		}
		data->last_limits = jiffies;
	}

	/* Update every second */
	if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
		data->temp_status = f71882fg_read8(data,
						F71882FG_REG_TEMP_STATUS);
		data->temp_diode_open = f71882fg_read8(data,
						F71882FG_REG_TEMP_DIODE_OPEN);
		for (nr = temp_start; nr < 3 + temp_start; nr++)
			data->temp[nr] = f71882fg_read8(data,
						F71882FG_REG_TEMP(nr));

		data->fan_status = f71882fg_read8(data,
						F71882FG_REG_FAN_STATUS);
		for (nr = 0; nr < nr_fans; nr++) {
			data->fan[nr] = f71882fg_read16(data,
						F71882FG_REG_FAN(nr));
			data->fan_target[nr] =
			    f71882fg_read16(data, F71882FG_REG_FAN_TARGET(nr));
			data->fan_full_speed[nr] =
			    f71882fg_read16(data,
					    F71882FG_REG_FAN_FULL_SPEED(nr));
			data->pwm[nr] =
			    f71882fg_read8(data, F71882FG_REG_PWM(nr));
		}

		/* The f8000 can monitor 1 more fan, but has no pwm for it */
		if (data->type == f8000)
			data->fan[3] = f71882fg_read16(data,
						F71882FG_REG_FAN(3));
		if (data->type == f71882fg)
			data->in_status = f71882fg_read8(data,
						F71882FG_REG_IN_STATUS);
		for (nr = 0; nr < nr_ins; nr++)
			data->in[nr] = f71882fg_read8(data,
						F71882FG_REG_IN(nr));

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

	mutex_unlock(&data->update_lock);

	return data;
}

/* Sysfs Interface */
static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
	char *buf)
{
	struct f71882fg_data *data = f71882fg_update_device(dev);
	int nr = to_sensor_dev_attr_2(devattr)->index;
	int speed = fan_from_reg(data->fan[nr]);

	if (speed == FAN_MIN_DETECT)
		speed = 0;

	return sprintf(buf, "%d\n", speed);
}

static ssize_t show_fan_full_speed(struct device *dev,
				   struct device_attribute *devattr, char *buf)
{
	struct f71882fg_data *data = f71882fg_update_device(dev);
	int nr = to_sensor_dev_attr_2(devattr)->index;
	int speed = fan_from_reg(data->fan_full_speed[nr]);
	return sprintf(buf, "%d\n", speed);
}

static ssize_t store_fan_full_speed(struct device *dev,
				    struct device_attribute *devattr,
				    const char *buf, size_t count)
{
	struct f71882fg_data *data = dev_get_drvdata(dev);
	int nr = to_sensor_dev_attr_2(devattr)->index;
	long val = simple_strtol(buf, NULL, 10);

	val = SENSORS_LIMIT(val, 23, 1500000);
	val = fan_to_reg(val);

	mutex_lock(&data->update_lock);
	f71882fg_write16(data, F71882FG_REG_FAN_FULL_SPEED(nr), val);
	data->fan_full_speed[nr] = val;
	mutex_unlock(&data->update_lock);

	return count;
}

static ssize_t show_fan_beep(struct device *dev, struct device_attribute
	*devattr, char *buf)
{
	struct f71882fg_data *data = f71882fg_update_device(dev);
	int nr = to_sensor_dev_attr_2(devattr)->index;

	if (data->fan_beep & (1 << nr))
		return sprintf(buf, "1\n");
	else
		return sprintf(buf, "0\n");
}

static ssize_t store_fan_beep(struct device *dev, struct device_attribute
	*devattr, const char *buf, size_t count)
{
	struct f71882fg_data *data = dev_get_drvdata(dev);
	int nr = to_sensor_dev_attr_2(devattr)->index;
	unsigned long val = simple_strtoul(buf, NULL, 10);

	mutex_lock(&data->update_lock);
	data->fan_beep = f71882fg_read8(data, F71882FG_REG_FAN_BEEP);
	if (val)
		data->fan_beep |= 1 << nr;
	else
		data->fan_beep &= ~(1 << nr);

	f71882fg_write8(data, F71882FG_REG_FAN_BEEP, data->fan_beep);
	mutex_unlock(&data->update_lock);

	return count;
}

static ssize_t show_fan_alarm(struct device *dev, struct device_attribute
	*devattr, char *buf)
{
	struct f71882fg_data *data = f71882fg_update_device(dev);
	int nr = to_sensor_dev_attr_2(devattr)->index;

	if (data->fan_status & (1 << nr))
		return sprintf(buf, "1\n");
	else
		return sprintf(buf, "0\n");
}

static ssize_t show_in(struct device *dev, struct device_attribute *devattr,
	char *buf)
{
	struct f71882fg_data *data = f71882fg_update_device(dev);
	int nr = to_sensor_dev_attr_2(devattr)->index;

	return sprintf(buf, "%d\n", data->in[nr] * 8);
}

static ssize_t show_in_max(struct device *dev, struct device_attribute
	*devattr, char *buf)
{
	struct f71882fg_data *data = f71882fg_update_device(dev);

	return sprintf(buf, "%d\n", data->in1_max * 8);
}

static ssize_t store_in_max(struct device *dev, struct device_attribute
	*devattr, const char *buf, size_t count)
{
	struct f71882fg_data *data = dev_get_drvdata(dev);
	long val = simple_strtol(buf, NULL, 10) / 8;
	val = SENSORS_LIMIT(val, 0, 255);

	mutex_lock(&data->update_lock);
	f71882fg_write8(data, F71882FG_REG_IN1_HIGH, val);
	data->in1_max = val;
	mutex_unlock(&data->update_lock);

	return count;
}

static ssize_t show_in_beep(struct device *dev, struct device_attribute
	*devattr, char *buf)
{
	struct f71882fg_data *data = f71882fg_update_device(dev);
	int nr = to_sensor_dev_attr_2(devattr)->index;

	if (data->in_beep & (1 << nr))
		return sprintf(buf, "1\n");
	else
		return sprintf(buf, "0\n");
}

static ssize_t store_in_beep(struct device *dev, struct device_attribute
	*devattr, const char *buf, size_t count)
{
	struct f71882fg_data *data = dev_get_drvdata(dev);
	int nr = to_sensor_dev_attr_2(devattr)->index;
	unsigned long val = simple_strtoul(buf, NULL, 10);

	mutex_lock(&data->update_lock);
	data->in_beep = f71882fg_read8(data, F71882FG_REG_IN_BEEP);
	if (val)
		data->in_beep |= 1 << nr;
	else
		data->in_beep &= ~(1 << nr);

	f71882fg_write8(data, F71882FG_REG_IN_BEEP, data->in_beep);
	mutex_unlock(&data->update_lock);

	return count;
}

static ssize_t show_in_alarm(struct device *dev, struct device_attribute
	*devattr, char *buf)
{
	struct f71882fg_data *data = f71882fg_update_device(dev);
	int nr = to_sensor_dev_attr_2(devattr)->index;

	if (data->in_status & (1 << nr))
		return sprintf(buf, "1\n");
	else
		return sprintf(buf, "0\n");
}

static ssize_t show_temp(struct device *dev, struct device_attribute *devattr,
	char *buf)
{
	struct f71882fg_data *data = f71882fg_update_device(dev);
	int nr = to_sensor_dev_attr_2(devattr)->index;

	return sprintf(buf, "%d\n", data->temp[nr] * 1000);
}

static ssize_t show_temp_max(struct device *dev, struct device_attribute
	*devattr, char *buf)
{
	struct f71882fg_data *data = f71882fg_update_device(dev);
	int nr = to_sensor_dev_attr_2(devattr)->index;

	return sprintf(buf, "%d\n", data->temp_high[nr] * 1000);
}

static ssize_t store_temp_max(struct device *dev, struct device_attribute
	*devattr, const char *buf, size_t count)
{
	struct f71882fg_data *data = dev_get_drvdata(dev);
	int nr = to_sensor_dev_attr_2(devattr)->index;
	long val = simple_strtol(buf, NULL, 10) / 1000;
	val = SENSORS_LIMIT(val, 0, 255);

	mutex_lock(&data->update_lock);
	f71882fg_write8(data, F71882FG_REG_TEMP_HIGH(nr), val);
	data->temp_high[nr] = val;
	mutex_unlock(&data->update_lock);

	return count;
}

static ssize_t show_temp_max_hyst(struct device *dev, struct device_attribute
	*devattr, char *buf)
{
	struct f71882fg_data *data = f71882fg_update_device(dev);
	int nr = to_sensor_dev_attr_2(devattr)->index;
	int temp_max_hyst;

	mutex_lock(&data->update_lock);
	if (nr & 1)
		temp_max_hyst = data->temp_hyst[nr / 2] >> 4;
	else
		temp_max_hyst = data->temp_hyst[nr / 2] & 0x0f;
	temp_max_hyst = (data->temp_high[nr] - temp_max_hyst) * 1000;
	mutex_unlock(&data->update_lock);

	return sprintf(buf, "%d\n", temp_max_hyst);
}

static ssize_t store_temp_max_hyst(struct device *dev, struct device_attribute
	*devattr, const char *buf, size_t count)
{
	struct f71882fg_data *data = dev_get_drvdata(dev);
	int nr = to_sensor_dev_attr_2(devattr)->index;
	long val = simple_strtol(buf, NULL, 10) / 1000;
	ssize_t ret = count;
	u8 reg;

	mutex_lock(&data->update_lock);

	/* convert abs to relative and check */
	data->temp_high[nr] = f71882fg_read8(data, F71882FG_REG_TEMP_HIGH(nr));
	val = SENSORS_LIMIT(val, data->temp_high[nr] - 15,
			    data->temp_high[nr]);
	val = data->temp_high[nr] - val;

	/* convert value to register contents */
	reg = f71882fg_read8(data, F71882FG_REG_TEMP_HYST(nr / 2));
	if (nr & 1)
		reg = (reg & 0x0f) | (val << 4);
	else
		reg = (reg & 0xf0) | val;
	f71882fg_write8(data, F71882FG_REG_TEMP_HYST(nr / 2), reg);
	data->temp_hyst[nr / 2] = reg;

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

static ssize_t show_temp_crit(struct device *dev, struct device_attribute
	*devattr, char *buf)
{
	struct f71882fg_data *data = f71882fg_update_device(dev);
	int nr = to_sensor_dev_attr_2(devattr)->index;

	return sprintf(buf, "%d\n", data->temp_ovt[nr] * 1000);
}

static ssize_t store_temp_crit(struct device *dev, struct device_attribute
	*devattr, const char *buf, size_t count)
{
	struct f71882fg_data *data = dev_get_drvdata(dev);
	int nr = to_sensor_dev_attr_2(devattr)->index;
	long val = simple_strtol(buf, NULL, 10) / 1000;
	val = SENSORS_LIMIT(val, 0, 255);

	mutex_lock(&data->update_lock);
	f71882fg_write8(data, F71882FG_REG_TEMP_OVT(nr), val);
	data->temp_ovt[nr] = val;
	mutex_unlock(&data->update_lock);

	return count;
}

static ssize_t show_temp_crit_hyst(struct device *dev, struct device_attribute
	*devattr, char *buf)
{
	struct f71882fg_data *data = f71882fg_update_device(dev);
	int nr = to_sensor_dev_attr_2(devattr)->index;
	int temp_crit_hyst;

	mutex_lock(&data->update_lock);
	if (nr & 1)
		temp_crit_hyst = data->temp_hyst[nr / 2] >> 4;
	else
		temp_crit_hyst = data->temp_hyst[nr / 2] & 0x0f;
	temp_crit_hyst = (data->temp_ovt[nr] - temp_crit_hyst) * 1000;
	mutex_unlock(&data->update_lock);

	return sprintf(buf, "%d\n", temp_crit_hyst);
}

static ssize_t show_temp_type(struct device *dev, struct device_attribute
	*devattr, char *buf)
{
	struct f71882fg_data *data = f71882fg_update_device(dev);
	int nr = to_sensor_dev_attr_2(devattr)->index;

	return sprintf(buf, "%d\n", data->temp_type[nr]);
}

static ssize_t show_temp_beep(struct device *dev, struct device_attribute
	*devattr, char *buf)
{
	struct f71882fg_data *data = f71882fg_update_device(dev);
	int nr = to_sensor_dev_attr_2(devattr)->index;

	if (data->temp_beep & (1 << nr))
		return sprintf(buf, "1\n");
	else
		return sprintf(buf, "0\n");
}

static ssize_t store_temp_beep(struct device *dev, struct device_attribute
	*devattr, const char *buf, size_t count)
{
	struct f71882fg_data *data = dev_get_drvdata(dev);
	int nr = to_sensor_dev_attr_2(devattr)->index;
	unsigned long val = simple_strtoul(buf, NULL, 10);

	mutex_lock(&data->update_lock);
	data->temp_beep = f71882fg_read8(data, F71882FG_REG_TEMP_BEEP);
	if (val)
		data->temp_beep |= 1 << nr;
	else
		data->temp_beep &= ~(1 << nr);

	f71882fg_write8(data, F71882FG_REG_TEMP_BEEP, data->temp_beep);
	mutex_unlock(&data->update_lock);

	return count;
}

static ssize_t show_temp_alarm(struct device *dev, struct device_attribute
	*devattr, char *buf)
{
	struct f71882fg_data *data = f71882fg_update_device(dev);
	int nr = to_sensor_dev_attr_2(devattr)->index;

	if (data->temp_status & (1 << nr))
		return sprintf(buf, "1\n");
	else
		return sprintf(buf, "0\n");
}

static ssize_t show_temp_fault(struct device *dev, struct device_attribute
	*devattr, char *buf)
{
	struct f71882fg_data *data = f71882fg_update_device(dev);
	int nr = to_sensor_dev_attr_2(devattr)->index;

	if (data->temp_diode_open & (1 << nr))
		return sprintf(buf, "1\n");
	else
		return sprintf(buf, "0\n");
}

static ssize_t show_pwm(struct device *dev,
			struct device_attribute *devattr, char *buf)
{
	struct f71882fg_data *data = f71882fg_update_device(dev);
	int val, nr = to_sensor_dev_attr_2(devattr)->index;
	mutex_lock(&data->update_lock);
	if (data->pwm_enable & (1 << (2 * nr)))
		/* PWM mode */
		val = data->pwm[nr];
	else {
		/* RPM mode */
		val = 255 * fan_from_reg(data->fan_target[nr])
			/ fan_from_reg(data->fan_full_speed[nr]);
	}
	mutex_unlock(&data->update_lock);
	return sprintf(buf, "%d\n", val);
}

static ssize_t store_pwm(struct device *dev,
			 struct device_attribute *devattr, const char *buf,
			 size_t count)
{
	struct f71882fg_data *data = dev_get_drvdata(dev);
	int nr = to_sensor_dev_attr_2(devattr)->index;
	long val = simple_strtol(buf, NULL, 10);
	val = SENSORS_LIMIT(val, 0, 255);

	mutex_lock(&data->update_lock);
	data->pwm_enable = f71882fg_read8(data, F71882FG_REG_PWM_ENABLE);
	if ((data->type == f8000 && ((data->pwm_enable >> 2 * nr) & 3) != 2) ||
	    (data->type != f8000 && !((data->pwm_enable >> 2 * nr) & 2))) {
		count = -EROFS;
		goto leave;
	}
	if (data->pwm_enable & (1 << (2 * nr))) {
		/* PWM mode */
		f71882fg_write8(data, F71882FG_REG_PWM(nr), val);
		data->pwm[nr] = val;
	} else {
		/* RPM mode */
		int target, full_speed;
		full_speed = f71882fg_read16(data,
					     F71882FG_REG_FAN_FULL_SPEED(nr));
		target = fan_to_reg(val * fan_from_reg(full_speed) / 255);
		f71882fg_write16(data, F71882FG_REG_FAN_TARGET(nr), target);
		data->fan_target[nr] = target;
		data->fan_full_speed[nr] = full_speed;
	}
leave:
	mutex_unlock(&data->update_lock);

	return count;
}

static ssize_t show_pwm_enable(struct device *dev,
			       struct device_attribute *devattr, char *buf)
{
	int result = 0;
	struct f71882fg_data *data = f71882fg_update_device(dev);
	int nr = to_sensor_dev_attr_2(devattr)->index;

	switch ((data->pwm_enable >> 2 * nr) & 3) {
	case 0:
	case 1:
		result = 2; /* Normal auto mode */
		break;
	case 2:
		result = 1; /* Manual mode */
		break;
	case 3:
		if (data->type == f8000)
			result = 3; /* Thermostat mode */
		else
			result = 1; /* Manual mode */
		break;
	}

	return sprintf(buf, "%d\n", result);
}

static ssize_t store_pwm_enable(struct device *dev, struct device_attribute
				*devattr, const char *buf, size_t count)
{
	struct f71882fg_data *data = dev_get_drvdata(dev);
	int nr = to_sensor_dev_attr_2(devattr)->index;
	long val = simple_strtol(buf, NULL, 10);

	mutex_lock(&data->update_lock);
	data->pwm_enable = f71882fg_read8(data, F71882FG_REG_PWM_ENABLE);
	/* Special case for F8000 auto PWM mode / Thermostat mode */
	if (data->type == f8000 && ((data->pwm_enable >> 2 * nr) & 1)) {
		switch (val) {
		case 2:
			data->pwm_enable &= ~(2 << (2 * nr));
			break;		/* Normal auto mode */
		case 3:
			data->pwm_enable |= 2 << (2 * nr);
			break;		/* Thermostat mode */
		default:
			count = -EINVAL;
			goto leave;
		}
	} else {
		switch (val) {
		case 1:
			data->pwm_enable |= 2 << (2 * nr);
			break;		/* Manual */
		case 2:
			data->pwm_enable &= ~(2 << (2 * nr));
			break;		/* Normal auto mode */
		default:
			count = -EINVAL;
			goto leave;
		}
	}
	f71882fg_write8(data, F71882FG_REG_PWM_ENABLE, data->pwm_enable);
leave:
	mutex_unlock(&data->update_lock);

	return count;
}

static ssize_t show_pwm_auto_point_pwm(struct device *dev,
				       struct device_attribute *devattr,
				       char *buf)
{
	int result;
	struct f71882fg_data *data = f71882fg_update_device(dev);
	int pwm = to_sensor_dev_attr_2(devattr)->index;
	int point = to_sensor_dev_attr_2(devattr)->nr;

	mutex_lock(&data->update_lock);
	if (data->pwm_enable & (1 << (2 * pwm))) {
		/* PWM mode */
		result = data->pwm_auto_point_pwm[pwm][point];
	} else {
		/* RPM mode */
		result = 32 * 255 / (32 + data->pwm_auto_point_pwm[pwm][point]);
	}
	mutex_unlock(&data->update_lock);

	return sprintf(buf, "%d\n", result);
}

static ssize_t store_pwm_auto_point_pwm(struct device *dev,
					struct device_attribute *devattr,
					const char *buf, size_t count)
{
	struct f71882fg_data *data = dev_get_drvdata(dev);
	int pwm = to_sensor_dev_attr_2(devattr)->index;
	int point = to_sensor_dev_attr_2(devattr)->nr;
	long val = simple_strtol(buf, NULL, 10);
	val = SENSORS_LIMIT(val, 0, 255);

	mutex_lock(&data->update_lock);
	data->pwm_enable = f71882fg_read8(data, F71882FG_REG_PWM_ENABLE);
	if (data->pwm_enable & (1 << (2 * pwm))) {
		/* PWM mode */
	} else {
		/* RPM mode */
		if (val < 29)	/* Prevent negative numbers */
			val = 255;
		else
			val = (255 - val) * 32 / val;
	}
	f71882fg_write8(data, F71882FG_REG_POINT_PWM(pwm, point), val);
	data->pwm_auto_point_pwm[pwm][point] = val;
	mutex_unlock(&data->update_lock);

	return count;
}

static ssize_t show_pwm_auto_point_temp_hyst(struct device *dev,
					     struct device_attribute *devattr,
					     char *buf)
{
	int result = 0;
	struct f71882fg_data *data = f71882fg_update_device(dev);
	int nr = to_sensor_dev_attr_2(devattr)->index;
	int point = to_sensor_dev_attr_2(devattr)->nr;

	mutex_lock(&data->update_lock);
	if (nr & 1)
		result = data->pwm_auto_point_hyst[nr / 2] >> 4;
	else
		result = data->pwm_auto_point_hyst[nr / 2] & 0x0f;
	result = 1000 * (data->pwm_auto_point_temp[nr][point] - result);
	mutex_unlock(&data->update_lock);

	return sprintf(buf, "%d\n", result);
}

static ssize_t store_pwm_auto_point_temp_hyst(struct device *dev,
					      struct device_attribute *devattr,
					      const char *buf, size_t count)
{
	struct f71882fg_data *data = dev_get_drvdata(dev);
	int nr = to_sensor_dev_attr_2(devattr)->index;
	int point = to_sensor_dev_attr_2(devattr)->nr;
	long val = simple_strtol(buf, NULL, 10) / 1000;
	u8 reg;

	mutex_lock(&data->update_lock);
	data->pwm_auto_point_temp[nr][point] =
		f71882fg_read8(data, F71882FG_REG_POINT_TEMP(nr, point));
	val = SENSORS_LIMIT(val, data->pwm_auto_point_temp[nr][point] - 15,
				data->pwm_auto_point_temp[nr][point]);
	val = data->pwm_auto_point_temp[nr][point] - val;

	reg = f71882fg_read8(data, F71882FG_REG_FAN_HYST(nr / 2));
	if (nr & 1)
		reg = (reg & 0x0f) | (val << 4);
	else
		reg = (reg & 0xf0) | val;

	f71882fg_write8(data, F71882FG_REG_FAN_HYST(nr / 2), reg);
	data->pwm_auto_point_hyst[nr / 2] = reg;
	mutex_unlock(&data->update_lock);

	return count;
}

static ssize_t show_pwm_interpolate(struct device *dev,
				    struct device_attribute *devattr, char *buf)
{
	int result;
	struct f71882fg_data *data = f71882fg_update_device(dev);
	int nr = to_sensor_dev_attr_2(devattr)->index;

	result = (data->pwm_auto_point_mapping[nr] >> 4) & 1;

	return sprintf(buf, "%d\n", result);
}

static ssize_t store_pwm_interpolate(struct device *dev,
				     struct device_attribute *devattr,
				     const char *buf, size_t count)
{
	struct f71882fg_data *data = dev_get_drvdata(dev);
	int nr = to_sensor_dev_attr_2(devattr)->index;
	unsigned long val = simple_strtoul(buf, NULL, 10);

	mutex_lock(&data->update_lock);
	data->pwm_auto_point_mapping[nr] =
		f71882fg_read8(data, F71882FG_REG_POINT_MAPPING(nr));
	if (val)
		val = data->pwm_auto_point_mapping[nr] | (1 << 4);
	else
		val = data->pwm_auto_point_mapping[nr] & (~(1 << 4));
	f71882fg_write8(data, F71882FG_REG_POINT_MAPPING(nr), val);
	data->pwm_auto_point_mapping[nr] = val;
	mutex_unlock(&data->update_lock);

	return count;
}

static ssize_t show_pwm_auto_point_channel(struct device *dev,
					   struct device_attribute *devattr,
					   char *buf)
{
	int result;
	struct f71882fg_data *data = f71882fg_update_device(dev);
	int nr = to_sensor_dev_attr_2(devattr)->index;
	int temp_start = (data->type == f8000) ? 0 : 1;

	result = 1 << ((data->pwm_auto_point_mapping[nr] & 3) - temp_start);

	return sprintf(buf, "%d\n", result);
}

static ssize_t store_pwm_auto_point_channel(struct device *dev,
					    struct device_attribute *devattr,
					    const char *buf, size_t count)
{
	struct f71882fg_data *data = dev_get_drvdata(dev);
	int nr = to_sensor_dev_attr_2(devattr)->index;
	int temp_start = (data->type == f8000) ? 0 : 1;
	long val = simple_strtol(buf, NULL, 10);

	switch (val) {
	case 1:
		val = 0;
		break;
	case 2:
		val = 1;
		break;
	case 4:
		val = 2;
		break;
	default:
		return -EINVAL;
	}
	val += temp_start;
	mutex_lock(&data->update_lock);
	data->pwm_auto_point_mapping[nr] =
		f71882fg_read8(data, F71882FG_REG_POINT_MAPPING(nr));
	val = (data->pwm_auto_point_mapping[nr] & 0xfc) | val;
	f71882fg_write8(data, F71882FG_REG_POINT_MAPPING(nr), val);
	data->pwm_auto_point_mapping[nr] = val;
	mutex_unlock(&data->update_lock);

	return count;
}

static ssize_t show_pwm_auto_point_temp(struct device *dev,
					struct device_attribute *devattr,
					char *buf)
{
	int result;
	struct f71882fg_data *data = f71882fg_update_device(dev);
	int pwm = to_sensor_dev_attr_2(devattr)->index;
	int point = to_sensor_dev_attr_2(devattr)->nr;

	result = data->pwm_auto_point_temp[pwm][point];
	return sprintf(buf, "%d\n", 1000 * result);
}

static ssize_t store_pwm_auto_point_temp(struct device *dev,
					 struct device_attribute *devattr,
					 const char *buf, size_t count)
{
	struct f71882fg_data *data = dev_get_drvdata(dev);
	int pwm = to_sensor_dev_attr_2(devattr)->index;
	int point = to_sensor_dev_attr_2(devattr)->nr;
	long val = simple_strtol(buf, NULL, 10) / 1000;
	val = SENSORS_LIMIT(val, 0, 255);

	mutex_lock(&data->update_lock);
	f71882fg_write8(data, F71882FG_REG_POINT_TEMP(pwm, point), val);
	data->pwm_auto_point_temp[pwm][point] = val;
	mutex_unlock(&data->update_lock);

	return count;
}

static ssize_t show_name(struct device *dev, struct device_attribute *devattr,
	char *buf)
{
	struct f71882fg_data *data = dev_get_drvdata(dev);
	return sprintf(buf, "%s\n", f71882fg_names[data->type]);
}

static int __devinit f71882fg_create_sysfs_files(struct platform_device *pdev,
	struct sensor_device_attribute_2 *attr, int count)
{
	int err, i;

	for (i = 0; i < count; i++) {
		err = device_create_file(&pdev->dev, &attr[i].dev_attr);
		if (err)
			return err;
	}
	return 0;
}

static int __devinit f71882fg_probe(struct platform_device *pdev)
{
	struct f71882fg_data *data;
	struct f71882fg_sio_data *sio_data = pdev->dev.platform_data;
	int err, i, nr_fans = (sio_data->type == f71882fg) ? 4 : 3;
	u8 start_reg;

	data = kzalloc(sizeof(struct f71882fg_data), GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	data->addr = platform_get_resource(pdev, IORESOURCE_IO, 0)->start;
	data->type = sio_data->type;
	mutex_init(&data->update_lock);
	platform_set_drvdata(pdev, data);

	start_reg = f71882fg_read8(data, F71882FG_REG_START);
	if (start_reg & 0x04) {
		dev_warn(&pdev->dev, "Hardware monitor is powered down\n");
		err = -ENODEV;
		goto exit_free;
	}
	if (!(start_reg & 0x03)) {
		dev_warn(&pdev->dev, "Hardware monitoring not activated\n");
		err = -ENODEV;
		goto exit_free;
	}

	data->pwm_enable = f71882fg_read8(data, F71882FG_REG_PWM_ENABLE);
	/* If it is a 71862 and the fan / pwm part is enabled sanity check
	   the pwm settings */
	if (data->type == f71862fg && (start_reg & 0x02)) {
		if ((data->pwm_enable & 0x15) != 0x15) {
			dev_err(&pdev->dev,
				"Invalid (reserved) pwm settings: 0x%02x\n",
				(unsigned int)data->pwm_enable);
			err = -ENODEV;
			goto exit_free;
		}
	}

	/* Register sysfs interface files */
	err = device_create_file(&pdev->dev, &dev_attr_name);
	if (err)
		goto exit_unregister_sysfs;

	if (start_reg & 0x01) {
		switch (data->type) {
		case f71882fg:
			err = f71882fg_create_sysfs_files(pdev,
					f71882fg_in_temp_attr,
					ARRAY_SIZE(f71882fg_in_temp_attr));
			if (err)
				goto exit_unregister_sysfs;
			/* fall through! */
		case f71862fg:
			err = f71882fg_create_sysfs_files(pdev,
					f718x2fg_in_temp_attr,
					ARRAY_SIZE(f718x2fg_in_temp_attr));
			break;
		case f8000:
			err = f71882fg_create_sysfs_files(pdev,
					f8000_in_temp_attr,
					ARRAY_SIZE(f8000_in_temp_attr));
			break;
		}
		if (err)
			goto exit_unregister_sysfs;
	}

	if (start_reg & 0x02) {
		err = f71882fg_create_sysfs_files(pdev, fxxxx_fan_attr,
					ARRAY_SIZE(fxxxx_fan_attr));
		if (err)
			goto exit_unregister_sysfs;

		switch (data->type) {
		case f71862fg:
			err = f71882fg_create_sysfs_files(pdev,
					f71862fg_fan_attr,
					ARRAY_SIZE(f71862fg_fan_attr));
			break;
		case f71882fg:
			err = f71882fg_create_sysfs_files(pdev,
					f71882fg_fan_attr,
					ARRAY_SIZE(f71882fg_fan_attr));
			break;
		case f8000:
			err = f71882fg_create_sysfs_files(pdev,
					f8000_fan_attr,
					ARRAY_SIZE(f8000_fan_attr));
			break;
		}
		if (err)
			goto exit_unregister_sysfs;

		for (i = 0; i < nr_fans; i++)
			dev_info(&pdev->dev, "Fan: %d is in %s mode\n", i + 1,
				 (data->pwm_enable & (1 << 2 * i)) ?
				 "duty-cycle" : "RPM");
	}

	data->hwmon_dev = hwmon_device_register(&pdev->dev);
	if (IS_ERR(data->hwmon_dev)) {
		err = PTR_ERR(data->hwmon_dev);
		data->hwmon_dev = NULL;
		goto exit_unregister_sysfs;
	}

	return 0;

exit_unregister_sysfs:
	f71882fg_remove(pdev); /* Will unregister the sysfs files for us */
	return err; /* f71882fg_remove() also frees our data */
exit_free:
	kfree(data);
	return err;
}

static int f71882fg_remove(struct platform_device *pdev)
{
	int i;
	struct f71882fg_data *data = platform_get_drvdata(pdev);

	platform_set_drvdata(pdev, NULL);
	if (data->hwmon_dev)
		hwmon_device_unregister(data->hwmon_dev);

	/* Note we are not looping over all attr arrays we have as the ones
	   below are supersets of the ones skipped. */
	device_remove_file(&pdev->dev, &dev_attr_name);

	for (i = 0; i < ARRAY_SIZE(f718x2fg_in_temp_attr); i++)
		device_remove_file(&pdev->dev,
					&f718x2fg_in_temp_attr[i].dev_attr);

	for (i = 0; i < ARRAY_SIZE(f71882fg_in_temp_attr); i++)
		device_remove_file(&pdev->dev,
					&f71882fg_in_temp_attr[i].dev_attr);

	for (i = 0; i < ARRAY_SIZE(fxxxx_fan_attr); i++)
		device_remove_file(&pdev->dev, &fxxxx_fan_attr[i].dev_attr);

	for (i = 0; i < ARRAY_SIZE(f71882fg_fan_attr); i++)
		device_remove_file(&pdev->dev, &f71882fg_fan_attr[i].dev_attr);

	for (i = 0; i < ARRAY_SIZE(f8000_fan_attr); i++)
		device_remove_file(&pdev->dev, &f8000_fan_attr[i].dev_attr);

	kfree(data);

	return 0;
}

static int __init f71882fg_find(int sioaddr, unsigned short *address,
	struct f71882fg_sio_data *sio_data)
{
	int err = -ENODEV;
	u16 devid;

	superio_enter(sioaddr);

	devid = superio_inw(sioaddr, SIO_REG_MANID);
	if (devid != SIO_FINTEK_ID) {
		pr_debug(DRVNAME ": Not a Fintek device\n");
		goto exit;
	}

	devid = force_id ? force_id : superio_inw(sioaddr, SIO_REG_DEVID);
	switch (devid) {
	case SIO_F71862_ID:
		sio_data->type = f71862fg;
		break;
	case SIO_F71882_ID:
		sio_data->type = f71882fg;
		break;
	case SIO_F8000_ID:
		sio_data->type = f8000;
		break;
	default:
		printk(KERN_INFO DRVNAME ": Unsupported Fintek device\n");
		goto exit;
	}

	superio_select(sioaddr, SIO_F71882FG_LD_HWM);
	if (!(superio_inb(sioaddr, SIO_REG_ENABLE) & 0x01)) {
		printk(KERN_WARNING DRVNAME ": Device not activated\n");
		goto exit;
	}

	*address = superio_inw(sioaddr, SIO_REG_ADDR);
	if (*address == 0)
	{
		printk(KERN_WARNING DRVNAME ": Base address not set\n");
		goto exit;
	}
	*address &= ~(REGION_LENGTH - 1);	/* Ignore 3 LSB */

	err = 0;
	printk(KERN_INFO DRVNAME ": Found %s chip at %#x, revision %d\n",
		f71882fg_names[sio_data->type],	(unsigned int)*address,
		(int)superio_inb(sioaddr, SIO_REG_DEVREV));
exit:
	superio_exit(sioaddr);
	return err;
}

static int __init f71882fg_device_add(unsigned short address,
	const struct f71882fg_sio_data *sio_data)
{
	struct resource res = {
		.start	= address,
		.end	= address + REGION_LENGTH - 1,
		.flags	= IORESOURCE_IO,
	};
	int err;

	f71882fg_pdev = platform_device_alloc(DRVNAME, address);
	if (!f71882fg_pdev)
		return -ENOMEM;

	res.name = f71882fg_pdev->name;
	err = acpi_check_resource_conflict(&res);
	if (err)
		goto exit_device_put;

	err = platform_device_add_resources(f71882fg_pdev, &res, 1);
	if (err) {
		printk(KERN_ERR DRVNAME ": Device resource addition failed\n");
		goto exit_device_put;
	}

	err = platform_device_add_data(f71882fg_pdev, sio_data,
				       sizeof(struct f71882fg_sio_data));
	if (err) {
		printk(KERN_ERR DRVNAME ": Platform data allocation failed\n");
		goto exit_device_put;
	}

	err = platform_device_add(f71882fg_pdev);
	if (err) {
		printk(KERN_ERR DRVNAME ": Device addition failed\n");
		goto exit_device_put;
	}

	return 0;

exit_device_put:
	platform_device_put(f71882fg_pdev);

	return err;
}

static int __init f71882fg_init(void)
{
	int err = -ENODEV;
	unsigned short address;
	struct f71882fg_sio_data sio_data;

	memset(&sio_data, 0, sizeof(sio_data));

	if (f71882fg_find(0x2e, &address, &sio_data) &&
	    f71882fg_find(0x4e, &address, &sio_data))
		goto exit;

	err = platform_driver_register(&f71882fg_driver);
	if (err)
		goto exit;

	err = f71882fg_device_add(address, &sio_data);
	if (err)
		goto exit_driver;

	return 0;

exit_driver:
	platform_driver_unregister(&f71882fg_driver);
exit:
	return err;
}

static void __exit f71882fg_exit(void)
{
	platform_device_unregister(f71882fg_pdev);
	platform_driver_unregister(&f71882fg_driver);
}

MODULE_DESCRIPTION("F71882FG Hardware Monitoring Driver");
MODULE_AUTHOR("Hans Edgington, Hans de Goede (hdegoede@redhat.com)");
MODULE_LICENSE("GPL");

module_init(f71882fg_init);
module_exit(f71882fg_exit);