/*

   * f71805f.c - driver for the Fintek F71805F/FG and F71872F/FG Super-I/O
   *             chips integrated hardware monitoring features

   * Copyright (C) 2005-2006  Jean Delvare <jdelvare@suse.de>

   *
   * The F71805F/FG is a LPC Super-I/O chip made by Fintek. It integrates
   * complete hardware monitoring features: voltage, fan and temperature
   * sensors, and manual and automatic fan speed control.
   *

   * The F71872F/FG is almost the same, with two more voltages monitored,
   * and 6 VID inputs.
   *

   * The F71806F/FG is essentially the same as the F71872F/FG. It even has
   * the same chip ID, so the driver can't differentiate between.
   *

   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation; either version 2 of the License, or
   * (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software
   * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
   */

  #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

  #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/sysfs.h>

  #include <linux/ioport.h>

  #include <linux/acpi.h>

  #include <linux/io.h>

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

  static struct platform_device *pdev;
  
  #define DRVNAME "f71805f"

  enum kinds { f71805f, f71872f };

  
  /*
   * Super-I/O constants and functions
   */
  
  #define F71805F_LD_HWM		0x04
  
  #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_FNSEL1		0x29	/* Multi Function Select 1 (F71872F) */

  #define SIO_REG_ENABLE		0x30	/* Logical device enable */
  #define SIO_REG_ADDR		0x60	/* Logical device address (2 bytes) */
  
  #define SIO_FINTEK_ID		0x1934
  #define SIO_F71805F_ID		0x0406

  #define SIO_F71872F_ID		0x0341

  
  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_select(int base, int ld)
  {
  	outb(SIO_REG_LDSEL, base);
  	outb(ld, base + 1);
  }
  
  static inline void
  superio_enter(int base)
  {
  	outb(0x87, base);
  	outb(0x87, base);
  }
  
  static inline void
  superio_exit(int base)
  {
  	outb(0xaa, base);
  }
  
  /*
   * ISA constants
   */

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

  /*
   * Registers
   */

  /* in nr from 0 to 10 (8-bit values) */

  #define F71805F_REG_IN(nr)		(0x10 + (nr))

  #define F71805F_REG_IN_HIGH(nr)		((nr) < 10 ? 0x40 + 2 * (nr) : 0x2E)
  #define F71805F_REG_IN_LOW(nr)		((nr) < 10 ? 0x41 + 2 * (nr) : 0x2F)

  /* fan nr from 0 to 2 (12-bit values, two registers) */
  #define F71805F_REG_FAN(nr)		(0x20 + 2 * (nr))
  #define F71805F_REG_FAN_LOW(nr)		(0x28 + 2 * (nr))

  #define F71805F_REG_FAN_TARGET(nr)	(0x69 + 16 * (nr))

  #define F71805F_REG_FAN_CTRL(nr)	(0x60 + 16 * (nr))

  #define F71805F_REG_PWM_FREQ(nr)	(0x63 + 16 * (nr))

  #define F71805F_REG_PWM_DUTY(nr)	(0x6B + 16 * (nr))

  /* temp nr from 0 to 2 (8-bit values) */
  #define F71805F_REG_TEMP(nr)		(0x1B + (nr))
  #define F71805F_REG_TEMP_HIGH(nr)	(0x54 + 2 * (nr))
  #define F71805F_REG_TEMP_HYST(nr)	(0x55 + 2 * (nr))
  #define F71805F_REG_TEMP_MODE		0x01

  /* pwm/fan pwmnr from 0 to 2, auto point apnr from 0 to 2 */
  /* map Fintek numbers to our numbers as follows: 9->0, 5->1, 1->2 */
  #define F71805F_REG_PWM_AUTO_POINT_TEMP(pwmnr, apnr) \
  					(0xA0 + 0x10 * (pwmnr) + (2 - (apnr)))
  #define F71805F_REG_PWM_AUTO_POINT_FAN(pwmnr, apnr) \
  					(0xA4 + 0x10 * (pwmnr) + \
  						2 * (2 - (apnr)))

  
  #define F71805F_REG_START		0x00
  /* status nr from 0 to 2 */
  #define F71805F_REG_STATUS(nr)		(0x36 + (nr))

  /* individual register bits */

  #define FAN_CTRL_DC_MODE		0x10

  #define FAN_CTRL_LATCH_FULL		0x08

  #define FAN_CTRL_MODE_MASK		0x03
  #define FAN_CTRL_MODE_SPEED		0x00
  #define FAN_CTRL_MODE_TEMPERATURE	0x01
  #define FAN_CTRL_MODE_MANUAL		0x02

  /*
   * Data structures and manipulation thereof
   */

  struct f71805f_auto_point {
  	u8 temp[3];
  	u16 fan[3];
  };

  struct f71805f_data {
  	unsigned short addr;
  	const char *name;

  	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[11];
  	u8 in_high[11];
  	u8 in_low[11];
  	u16 has_in;

  	u16 fan[3];
  	u16 fan_low[3];

  	u16 fan_target[3];

  	u8 fan_ctrl[3];

  	u8 pwm[3];

  	u8 pwm_freq[3];

  	u8 temp[3];
  	u8 temp_high[3];
  	u8 temp_hyst[3];
  	u8 temp_mode;

  	unsigned long alarms;

  	struct f71805f_auto_point auto_points[3];

  };

  struct f71805f_sio_data {
  	enum kinds kind;
  	u8 fnsel1;
  };

  static inline long in_from_reg(u8 reg)
  {

  	return reg * 8;

  }
  
  /* The 2 least significant bits are not used */
  static inline u8 in_to_reg(long val)
  {
  	if (val <= 0)
  		return 0;
  	if (val >= 2016)
  		return 0xfc;

  	return ((val + 16) / 32) << 2;

  }
  
  /* in0 is downscaled by a factor 2 internally */
  static inline long in0_from_reg(u8 reg)
  {

  	return reg * 16;

  }
  
  static inline u8 in0_to_reg(long val)
  {
  	if (val <= 0)
  		return 0;
  	if (val >= 4032)
  		return 0xfc;

  	return ((val + 32) / 64) << 2;

  }
  
  /* The 4 most significant bits are not used */
  static inline long fan_from_reg(u16 reg)
  {
  	reg &= 0xfff;
  	if (!reg || reg == 0xfff)
  		return 0;

  	return 1500000 / reg;

  }
  
  static inline u16 fan_to_reg(long rpm)
  {

  	/*
  	 * If the low limit is set below what the chip can measure,
  	 * store the largest possible 12-bit value in the registers,
  	 * so that no alarm will ever trigger.
  	 */

  	if (rpm < 367)
  		return 0xfff;

  	return 1500000 / rpm;

  }

  static inline unsigned long pwm_freq_from_reg(u8 reg)
  {
  	unsigned long clock = (reg & 0x80) ? 48000000UL : 1000000UL;
  
  	reg &= 0x7f;
  	if (reg == 0)
  		reg++;
  	return clock / (reg << 8);
  }
  
  static inline u8 pwm_freq_to_reg(unsigned long val)
  {
  	if (val >= 187500)	/* The highest we can do */
  		return 0x80;
  	if (val >= 1475)	/* Use 48 MHz clock */
  		return 0x80 | (48000000UL / (val << 8));
  	if (val < 31)		/* The lowest we can do */
  		return 0x7f;
  	else			/* Use 1 MHz clock */
  		return 1000000UL / (val << 8);
  }

  static inline int pwm_mode_from_reg(u8 reg)
  {
  	return !(reg & FAN_CTRL_DC_MODE);
  }

  static inline long temp_from_reg(u8 reg)
  {

  	return reg * 1000;

  }
  
  static inline u8 temp_to_reg(long val)
  {

  	if (val <= 0)
  		return 0;
  	if (val >= 1000 * 0xff)
  		return 0xff;
  	return (val + 500) / 1000;

  }
  
  /*
   * Device I/O access
   */

  /* Must be called with data->update_lock held, except during initialization */

  static u8 f71805f_read8(struct f71805f_data *data, u8 reg)
  {

  	outb(reg, data->addr + ADDR_REG_OFFSET);

  	return inb(data->addr + DATA_REG_OFFSET);

  }

  /* Must be called with data->update_lock held, except during initialization */

  static void f71805f_write8(struct f71805f_data *data, u8 reg, u8 val)
  {

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

  }

  /*
   * It is important to read the MSB first, because doing so latches the
   * value of the LSB, so we are sure both bytes belong to the same value.
   * Must be called with data->update_lock held, except during initialization
   */

  static u16 f71805f_read16(struct f71805f_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;
  }

  /* Must be called with data->update_lock held, except during initialization */

  static void f71805f_write16(struct f71805f_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 & 0xff, data->addr + DATA_REG_OFFSET);

  }
  
  static struct f71805f_data *f71805f_update_device(struct device *dev)
  {
  	struct f71805f_data *data = dev_get_drvdata(dev);

  	int nr, apnr;

  	mutex_lock(&data->update_lock);

  
  	/* Limit registers cache is refreshed after 60 seconds */
  	if (time_after(jiffies, data->last_updated + 60 * HZ)
  	 || !data->valid) {

  		for (nr = 0; nr < 11; nr++) {
  			if (!(data->has_in & (1 << nr)))
  				continue;

  			data->in_high[nr] = f71805f_read8(data,
  					    F71805F_REG_IN_HIGH(nr));
  			data->in_low[nr] = f71805f_read8(data,
  					   F71805F_REG_IN_LOW(nr));
  		}
  		for (nr = 0; nr < 3; nr++) {

  			data->fan_low[nr] = f71805f_read16(data,
  					    F71805F_REG_FAN_LOW(nr));

  			data->fan_target[nr] = f71805f_read16(data,
  					       F71805F_REG_FAN_TARGET(nr));

  			data->pwm_freq[nr] = f71805f_read8(data,
  					     F71805F_REG_PWM_FREQ(nr));

  		}
  		for (nr = 0; nr < 3; nr++) {
  			data->temp_high[nr] = f71805f_read8(data,
  					      F71805F_REG_TEMP_HIGH(nr));
  			data->temp_hyst[nr] = f71805f_read8(data,
  					      F71805F_REG_TEMP_HYST(nr));
  		}
  		data->temp_mode = f71805f_read8(data, F71805F_REG_TEMP_MODE);

  		for (nr = 0; nr < 3; nr++) {
  			for (apnr = 0; apnr < 3; apnr++) {
  				data->auto_points[nr].temp[apnr] =
  					f71805f_read8(data,
  					F71805F_REG_PWM_AUTO_POINT_TEMP(nr,
  									apnr));
  				data->auto_points[nr].fan[apnr] =
  					f71805f_read16(data,
  					F71805F_REG_PWM_AUTO_POINT_FAN(nr,
  								       apnr));
  			}
  		}

  
  		data->last_limits = jiffies;
  	}
  
  	/* Measurement registers cache is refreshed after 1 second */
  	if (time_after(jiffies, data->last_updated + HZ)
  	 || !data->valid) {

  		for (nr = 0; nr < 11; nr++) {
  			if (!(data->has_in & (1 << nr)))
  				continue;

  			data->in[nr] = f71805f_read8(data,
  				       F71805F_REG_IN(nr));
  		}
  		for (nr = 0; nr < 3; nr++) {

  			data->fan[nr] = f71805f_read16(data,
  					F71805F_REG_FAN(nr));

  			data->fan_ctrl[nr] = f71805f_read8(data,
  					     F71805F_REG_FAN_CTRL(nr));
  			data->pwm[nr] = f71805f_read8(data,
  					F71805F_REG_PWM_DUTY(nr));

  		}
  		for (nr = 0; nr < 3; nr++) {
  			data->temp[nr] = f71805f_read8(data,
  					 F71805F_REG_TEMP(nr));
  		}

  		data->alarms = f71805f_read8(data, F71805F_REG_STATUS(0))
  			+ (f71805f_read8(data, F71805F_REG_STATUS(1)) << 8)
  			+ (f71805f_read8(data, F71805F_REG_STATUS(2)) << 16);

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

  	mutex_unlock(&data->update_lock);

  
  	return data;
  }
  
  /*
   * Sysfs interface
   */
  
  static ssize_t show_in0(struct device *dev, struct device_attribute *devattr,
  			char *buf)
  {
  	struct f71805f_data *data = f71805f_update_device(dev);

  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	int nr = attr->index;

  	return sprintf(buf, "%ld
  ", in0_from_reg(data->in[nr]));

  }
  
  static ssize_t show_in0_max(struct device *dev, struct device_attribute
  			    *devattr, char *buf)
  {
  	struct f71805f_data *data = f71805f_update_device(dev);

  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	int nr = attr->index;

  	return sprintf(buf, "%ld
  ", in0_from_reg(data->in_high[nr]));

  }
  
  static ssize_t show_in0_min(struct device *dev, struct device_attribute
  			    *devattr, char *buf)
  {
  	struct f71805f_data *data = f71805f_update_device(dev);

  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	int nr = attr->index;

  	return sprintf(buf, "%ld
  ", in0_from_reg(data->in_low[nr]));

  }
  
  static ssize_t set_in0_max(struct device *dev, struct device_attribute
  			   *devattr, const char *buf, size_t count)
  {
  	struct f71805f_data *data = dev_get_drvdata(dev);

  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	int nr = attr->index;

  	long val;
  	int err;
  
  	err = kstrtol(buf, 10, &val);
  	if (err)
  		return err;

  	mutex_lock(&data->update_lock);

  	data->in_high[nr] = in0_to_reg(val);
  	f71805f_write8(data, F71805F_REG_IN_HIGH(nr), data->in_high[nr]);

  	mutex_unlock(&data->update_lock);

  
  	return count;
  }
  
  static ssize_t set_in0_min(struct device *dev, struct device_attribute
  			   *devattr, const char *buf, size_t count)
  {
  	struct f71805f_data *data = dev_get_drvdata(dev);

  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	int nr = attr->index;

  	long val;
  	int err;
  
  	err = kstrtol(buf, 10, &val);
  	if (err)
  		return err;

  	mutex_lock(&data->update_lock);

  	data->in_low[nr] = in0_to_reg(val);
  	f71805f_write8(data, F71805F_REG_IN_LOW(nr), data->in_low[nr]);

  	mutex_unlock(&data->update_lock);

  
  	return count;
  }

  static ssize_t show_in(struct device *dev, struct device_attribute *devattr,
  		       char *buf)
  {
  	struct f71805f_data *data = f71805f_update_device(dev);
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	int nr = attr->index;
  
  	return sprintf(buf, "%ld
  ", in_from_reg(data->in[nr]));
  }
  
  static ssize_t show_in_max(struct device *dev, struct device_attribute
  			   *devattr, char *buf)
  {
  	struct f71805f_data *data = f71805f_update_device(dev);
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	int nr = attr->index;
  
  	return sprintf(buf, "%ld
  ", in_from_reg(data->in_high[nr]));
  }
  
  static ssize_t show_in_min(struct device *dev, struct device_attribute
  			   *devattr, char *buf)
  {
  	struct f71805f_data *data = f71805f_update_device(dev);
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	int nr = attr->index;
  
  	return sprintf(buf, "%ld
  ", in_from_reg(data->in_low[nr]));
  }
  
  static ssize_t set_in_max(struct device *dev, struct device_attribute
  			  *devattr, const char *buf, size_t count)
  {
  	struct f71805f_data *data = dev_get_drvdata(dev);
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	int nr = attr->index;

  	long val;
  	int err;
  
  	err = kstrtol(buf, 10, &val);
  	if (err)
  		return err;

  	mutex_lock(&data->update_lock);

  	data->in_high[nr] = in_to_reg(val);
  	f71805f_write8(data, F71805F_REG_IN_HIGH(nr), data->in_high[nr]);

  	mutex_unlock(&data->update_lock);

  
  	return count;
  }
  
  static ssize_t set_in_min(struct device *dev, struct device_attribute
  			  *devattr, const char *buf, size_t count)
  {
  	struct f71805f_data *data = dev_get_drvdata(dev);
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	int nr = attr->index;

  	long val;
  	int err;
  
  	err = kstrtol(buf, 10, &val);
  	if (err)
  		return err;

  	mutex_lock(&data->update_lock);

  	data->in_low[nr] = in_to_reg(val);
  	f71805f_write8(data, F71805F_REG_IN_LOW(nr), data->in_low[nr]);

  	mutex_unlock(&data->update_lock);

  
  	return count;
  }

  static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
  			char *buf)
  {
  	struct f71805f_data *data = f71805f_update_device(dev);
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	int nr = attr->index;
  
  	return sprintf(buf, "%ld
  ", fan_from_reg(data->fan[nr]));
  }
  
  static ssize_t show_fan_min(struct device *dev, struct device_attribute
  			    *devattr, char *buf)
  {
  	struct f71805f_data *data = f71805f_update_device(dev);
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	int nr = attr->index;
  
  	return sprintf(buf, "%ld
  ", fan_from_reg(data->fan_low[nr]));
  }

  static ssize_t show_fan_target(struct device *dev, struct device_attribute
  			       *devattr, char *buf)
  {
  	struct f71805f_data *data = f71805f_update_device(dev);
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	int nr = attr->index;
  
  	return sprintf(buf, "%ld
  ", fan_from_reg(data->fan_target[nr]));
  }

  static ssize_t set_fan_min(struct device *dev, struct device_attribute
  			   *devattr, const char *buf, size_t count)
  {
  	struct f71805f_data *data = dev_get_drvdata(dev);
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	int nr = attr->index;

  	long val;
  	int err;
  
  	err = kstrtol(buf, 10, &val);
  	if (err)
  		return err;

  	mutex_lock(&data->update_lock);

  	data->fan_low[nr] = fan_to_reg(val);
  	f71805f_write16(data, F71805F_REG_FAN_LOW(nr), data->fan_low[nr]);

  	mutex_unlock(&data->update_lock);

  
  	return count;
  }

  static ssize_t set_fan_target(struct device *dev, struct device_attribute
  			      *devattr, const char *buf, size_t count)
  {
  	struct f71805f_data *data = dev_get_drvdata(dev);
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	int nr = attr->index;

  	long val;
  	int err;
  
  	err = kstrtol(buf, 10, &val);
  	if (err)
  		return err;

  
  	mutex_lock(&data->update_lock);
  	data->fan_target[nr] = fan_to_reg(val);
  	f71805f_write16(data, F71805F_REG_FAN_TARGET(nr),
  			data->fan_target[nr]);
  	mutex_unlock(&data->update_lock);
  
  	return count;
  }

  static ssize_t show_pwm(struct device *dev, struct device_attribute *devattr,
  			char *buf)
  {
  	struct f71805f_data *data = f71805f_update_device(dev);
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	int nr = attr->index;
  
  	return sprintf(buf, "%d
  ", (int)data->pwm[nr]);
  }
  
  static ssize_t show_pwm_enable(struct device *dev, struct device_attribute
  			       *devattr, char *buf)
  {
  	struct f71805f_data *data = f71805f_update_device(dev);
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	int nr = attr->index;
  	int mode;
  
  	switch (data->fan_ctrl[nr] & FAN_CTRL_MODE_MASK) {
  	case FAN_CTRL_MODE_SPEED:
  		mode = 3;
  		break;
  	case FAN_CTRL_MODE_TEMPERATURE:
  		mode = 2;
  		break;
  	default: /* MANUAL */
  		mode = 1;
  	}
  
  	return sprintf(buf, "%d
  ", mode);
  }

  static ssize_t show_pwm_freq(struct device *dev, struct device_attribute
  			     *devattr, char *buf)
  {
  	struct f71805f_data *data = f71805f_update_device(dev);
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	int nr = attr->index;
  
  	return sprintf(buf, "%lu
  ", pwm_freq_from_reg(data->pwm_freq[nr]));
  }

  static ssize_t show_pwm_mode(struct device *dev, struct device_attribute
  			     *devattr, char *buf)
  {
  	struct f71805f_data *data = f71805f_update_device(dev);
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	int nr = attr->index;
  
  	return sprintf(buf, "%d
  ", pwm_mode_from_reg(data->fan_ctrl[nr]));
  }

  static ssize_t set_pwm(struct device *dev, struct device_attribute *devattr,
  		       const char *buf, size_t count)
  {
  	struct f71805f_data *data = dev_get_drvdata(dev);
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	int nr = attr->index;

  	unsigned long val;
  	int err;
  
  	err = kstrtoul(buf, 10, &val);
  	if (err)
  		return err;

  
  	if (val > 255)
  		return -EINVAL;
  
  	mutex_lock(&data->update_lock);
  	data->pwm[nr] = val;
  	f71805f_write8(data, F71805F_REG_PWM_DUTY(nr), data->pwm[nr]);
  	mutex_unlock(&data->update_lock);
  
  	return count;
  }
  
  static struct attribute *f71805f_attr_pwm[];
  
  static ssize_t set_pwm_enable(struct device *dev, struct device_attribute
  			      *devattr, const char *buf, size_t count)
  {
  	struct f71805f_data *data = dev_get_drvdata(dev);
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	int nr = attr->index;

  	u8 reg;

  	unsigned long val;
  	int err;
  
  	err = kstrtoul(buf, 10, &val);
  	if (err)
  		return err;

  
  	if (val < 1 || val > 3)
  		return -EINVAL;
  
  	if (val > 1) { /* Automatic mode, user can't set PWM value */
  		if (sysfs_chmod_file(&dev->kobj, f71805f_attr_pwm[nr],
  				     S_IRUGO))
  			dev_dbg(dev, "chmod -w pwm%d failed
  ", nr + 1);
  	}
  
  	mutex_lock(&data->update_lock);
  	reg = f71805f_read8(data, F71805F_REG_FAN_CTRL(nr))
  	    & ~FAN_CTRL_MODE_MASK;
  	switch (val) {
  	case 1:
  		reg |= FAN_CTRL_MODE_MANUAL;
  		break;
  	case 2:
  		reg |= FAN_CTRL_MODE_TEMPERATURE;
  		break;
  	case 3:
  		reg |= FAN_CTRL_MODE_SPEED;
  		break;
  	}
  	data->fan_ctrl[nr] = reg;
  	f71805f_write8(data, F71805F_REG_FAN_CTRL(nr), reg);
  	mutex_unlock(&data->update_lock);
  
  	if (val == 1) { /* Manual mode, user can set PWM value */
  		if (sysfs_chmod_file(&dev->kobj, f71805f_attr_pwm[nr],
  				     S_IRUGO | S_IWUSR))
  			dev_dbg(dev, "chmod +w pwm%d failed
  ", nr + 1);
  	}
  
  	return count;
  }

  static ssize_t set_pwm_freq(struct device *dev, struct device_attribute
  			    *devattr, const char *buf, size_t count)
  {
  	struct f71805f_data *data = dev_get_drvdata(dev);
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	int nr = attr->index;

  	unsigned long val;
  	int err;
  
  	err = kstrtoul(buf, 10, &val);
  	if (err)
  		return err;

  
  	mutex_lock(&data->update_lock);
  	data->pwm_freq[nr] = pwm_freq_to_reg(val);
  	f71805f_write8(data, F71805F_REG_PWM_FREQ(nr), data->pwm_freq[nr]);
  	mutex_unlock(&data->update_lock);
  
  	return count;
  }

  static ssize_t show_pwm_auto_point_temp(struct device *dev,
  					struct device_attribute *devattr,

  					char *buf)

  {
  	struct f71805f_data *data = dev_get_drvdata(dev);
  	struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
  	int pwmnr = attr->nr;
  	int apnr = attr->index;
  
  	return sprintf(buf, "%ld
  ",
  		       temp_from_reg(data->auto_points[pwmnr].temp[apnr]));
  }
  
  static ssize_t set_pwm_auto_point_temp(struct device *dev,
  				       struct device_attribute *devattr,

  				       const char *buf, size_t count)

  {
  	struct f71805f_data *data = dev_get_drvdata(dev);
  	struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
  	int pwmnr = attr->nr;
  	int apnr = attr->index;

  	unsigned long val;
  	int err;
  
  	err = kstrtoul(buf, 10, &val);
  	if (err)
  		return err;

  
  	mutex_lock(&data->update_lock);
  	data->auto_points[pwmnr].temp[apnr] = temp_to_reg(val);
  	f71805f_write8(data, F71805F_REG_PWM_AUTO_POINT_TEMP(pwmnr, apnr),
  		       data->auto_points[pwmnr].temp[apnr]);
  	mutex_unlock(&data->update_lock);
  
  	return count;
  }
  
  static ssize_t show_pwm_auto_point_fan(struct device *dev,
  				       struct device_attribute *devattr,

  				       char *buf)

  {
  	struct f71805f_data *data = dev_get_drvdata(dev);
  	struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
  	int pwmnr = attr->nr;
  	int apnr = attr->index;
  
  	return sprintf(buf, "%ld
  ",
  		       fan_from_reg(data->auto_points[pwmnr].fan[apnr]));
  }
  
  static ssize_t set_pwm_auto_point_fan(struct device *dev,
  				      struct device_attribute *devattr,

  				      const char *buf, size_t count)

  {
  	struct f71805f_data *data = dev_get_drvdata(dev);
  	struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
  	int pwmnr = attr->nr;
  	int apnr = attr->index;

  	unsigned long val;
  	int err;
  
  	err = kstrtoul(buf, 10, &val);
  	if (err)
  		return err;

  
  	mutex_lock(&data->update_lock);
  	data->auto_points[pwmnr].fan[apnr] = fan_to_reg(val);
  	f71805f_write16(data, F71805F_REG_PWM_AUTO_POINT_FAN(pwmnr, apnr),

  			data->auto_points[pwmnr].fan[apnr]);

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

  static ssize_t show_temp(struct device *dev, struct device_attribute *devattr,
  			 char *buf)
  {
  	struct f71805f_data *data = f71805f_update_device(dev);
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	int nr = attr->index;
  
  	return sprintf(buf, "%ld
  ", temp_from_reg(data->temp[nr]));
  }
  
  static ssize_t show_temp_max(struct device *dev, struct device_attribute
  			     *devattr, char *buf)
  {
  	struct f71805f_data *data = f71805f_update_device(dev);
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	int nr = attr->index;
  
  	return sprintf(buf, "%ld
  ", temp_from_reg(data->temp_high[nr]));
  }
  
  static ssize_t show_temp_hyst(struct device *dev, struct device_attribute
  			      *devattr, char *buf)
  {
  	struct f71805f_data *data = f71805f_update_device(dev);
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	int nr = attr->index;
  
  	return sprintf(buf, "%ld
  ", temp_from_reg(data->temp_hyst[nr]));
  }
  
  static ssize_t show_temp_type(struct device *dev, struct device_attribute
  			      *devattr, char *buf)
  {
  	struct f71805f_data *data = f71805f_update_device(dev);
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	int nr = attr->index;
  
  	/* 3 is diode, 4 is thermistor */
  	return sprintf(buf, "%u
  ", (data->temp_mode & (1 << nr)) ? 3 : 4);
  }
  
  static ssize_t set_temp_max(struct device *dev, struct device_attribute
  			    *devattr, const char *buf, size_t count)
  {
  	struct f71805f_data *data = dev_get_drvdata(dev);
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	int nr = attr->index;

  	long val;
  	int err;
  
  	err = kstrtol(buf, 10, &val);
  	if (err)
  		return err;

  	mutex_lock(&data->update_lock);

  	data->temp_high[nr] = temp_to_reg(val);
  	f71805f_write8(data, F71805F_REG_TEMP_HIGH(nr), data->temp_high[nr]);

  	mutex_unlock(&data->update_lock);

  
  	return count;
  }
  
  static ssize_t set_temp_hyst(struct device *dev, struct device_attribute
  			     *devattr, const char *buf, size_t count)
  {
  	struct f71805f_data *data = dev_get_drvdata(dev);
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	int nr = attr->index;

  	long val;
  	int err;
  
  	err = kstrtol(buf, 10, &val);
  	if (err)
  		return err;

  	mutex_lock(&data->update_lock);

  	data->temp_hyst[nr] = temp_to_reg(val);
  	f71805f_write8(data, F71805F_REG_TEMP_HYST(nr), data->temp_hyst[nr]);

  	mutex_unlock(&data->update_lock);

  
  	return count;
  }

  static ssize_t show_alarms_in(struct device *dev, struct device_attribute
  			      *devattr, char *buf)
  {
  	struct f71805f_data *data = f71805f_update_device(dev);

  	return sprintf(buf, "%lu
  ", data->alarms & 0x7ff);

  }
  
  static ssize_t show_alarms_fan(struct device *dev, struct device_attribute
  			       *devattr, char *buf)
  {
  	struct f71805f_data *data = f71805f_update_device(dev);

  	return sprintf(buf, "%lu
  ", (data->alarms >> 16) & 0x07);

  }
  
  static ssize_t show_alarms_temp(struct device *dev, struct device_attribute
  				*devattr, char *buf)
  {
  	struct f71805f_data *data = f71805f_update_device(dev);

  	return sprintf(buf, "%lu
  ", (data->alarms >> 11) & 0x07);
  }
  
  static ssize_t show_alarm(struct device *dev, struct device_attribute
  			  *devattr, char *buf)
  {
  	struct f71805f_data *data = f71805f_update_device(dev);
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	int bitnr = attr->index;
  
  	return sprintf(buf, "%lu
  ", (data->alarms >> bitnr) & 1);

  }

  static ssize_t show_name(struct device *dev, struct device_attribute
  			 *devattr, char *buf)
  {
  	struct f71805f_data *data = dev_get_drvdata(dev);
  
  	return sprintf(buf, "%s
  ", data->name);
  }

  static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_in0, NULL, 0);

  static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO | S_IWUSR,

  			  show_in0_max, set_in0_max, 0);

  static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO | S_IWUSR,

  			  show_in0_min, set_in0_min, 0);

  static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in, NULL, 1);
  static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO | S_IWUSR,
  			  show_in_max, set_in_max, 1);
  static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO | S_IWUSR,
  			  show_in_min, set_in_min, 1);
  static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in, NULL, 2);
  static SENSOR_DEVICE_ATTR(in2_max, S_IRUGO | S_IWUSR,
  			  show_in_max, set_in_max, 2);
  static SENSOR_DEVICE_ATTR(in2_min, S_IRUGO | S_IWUSR,
  			  show_in_min, set_in_min, 2);
  static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in, NULL, 3);
  static SENSOR_DEVICE_ATTR(in3_max, S_IRUGO | S_IWUSR,
  			  show_in_max, set_in_max, 3);
  static SENSOR_DEVICE_ATTR(in3_min, S_IRUGO | S_IWUSR,
  			  show_in_min, set_in_min, 3);
  static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, show_in, NULL, 4);
  static SENSOR_DEVICE_ATTR(in4_max, S_IRUGO | S_IWUSR,
  			  show_in_max, set_in_max, 4);
  static SENSOR_DEVICE_ATTR(in4_min, S_IRUGO | S_IWUSR,
  			  show_in_min, set_in_min, 4);
  static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, show_in, NULL, 5);
  static SENSOR_DEVICE_ATTR(in5_max, S_IRUGO | S_IWUSR,
  			  show_in_max, set_in_max, 5);
  static SENSOR_DEVICE_ATTR(in5_min, S_IRUGO | S_IWUSR,
  			  show_in_min, set_in_min, 5);
  static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, show_in, NULL, 6);
  static SENSOR_DEVICE_ATTR(in6_max, S_IRUGO | S_IWUSR,
  			  show_in_max, set_in_max, 6);
  static SENSOR_DEVICE_ATTR(in6_min, S_IRUGO | S_IWUSR,
  			  show_in_min, set_in_min, 6);
  static SENSOR_DEVICE_ATTR(in7_input, S_IRUGO, show_in, NULL, 7);
  static SENSOR_DEVICE_ATTR(in7_max, S_IRUGO | S_IWUSR,
  			  show_in_max, set_in_max, 7);
  static SENSOR_DEVICE_ATTR(in7_min, S_IRUGO | S_IWUSR,
  			  show_in_min, set_in_min, 7);
  static SENSOR_DEVICE_ATTR(in8_input, S_IRUGO, show_in, NULL, 8);
  static SENSOR_DEVICE_ATTR(in8_max, S_IRUGO | S_IWUSR,
  			  show_in_max, set_in_max, 8);
  static SENSOR_DEVICE_ATTR(in8_min, S_IRUGO | S_IWUSR,
  			  show_in_min, set_in_min, 8);

  static SENSOR_DEVICE_ATTR(in9_input, S_IRUGO, show_in0, NULL, 9);
  static SENSOR_DEVICE_ATTR(in9_max, S_IRUGO | S_IWUSR,
  			  show_in0_max, set_in0_max, 9);
  static SENSOR_DEVICE_ATTR(in9_min, S_IRUGO | S_IWUSR,
  			  show_in0_min, set_in0_min, 9);
  static SENSOR_DEVICE_ATTR(in10_input, S_IRUGO, show_in0, NULL, 10);
  static SENSOR_DEVICE_ATTR(in10_max, S_IRUGO | S_IWUSR,
  			  show_in0_max, set_in0_max, 10);
  static SENSOR_DEVICE_ATTR(in10_min, S_IRUGO | S_IWUSR,
  			  show_in0_min, set_in0_min, 10);

  
  static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
  static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR,
  			  show_fan_min, set_fan_min, 0);

  static SENSOR_DEVICE_ATTR(fan1_target, S_IRUGO | S_IWUSR,
  			  show_fan_target, set_fan_target, 0);

  static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
  static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO | S_IWUSR,
  			  show_fan_min, set_fan_min, 1);

  static SENSOR_DEVICE_ATTR(fan2_target, S_IRUGO | S_IWUSR,
  			  show_fan_target, set_fan_target, 1);

  static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
  static SENSOR_DEVICE_ATTR(fan3_min, S_IRUGO | S_IWUSR,
  			  show_fan_min, set_fan_min, 2);

  static SENSOR_DEVICE_ATTR(fan3_target, S_IRUGO | S_IWUSR,
  			  show_fan_target, set_fan_target, 2);

  
  static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
  static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR,
  		    show_temp_max, set_temp_max, 0);
  static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR,
  		    show_temp_hyst, set_temp_hyst, 0);
  static SENSOR_DEVICE_ATTR(temp1_type, S_IRUGO, show_temp_type, NULL, 0);
  static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
  static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO | S_IWUSR,
  		    show_temp_max, set_temp_max, 1);
  static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO | S_IWUSR,
  		    show_temp_hyst, set_temp_hyst, 1);
  static SENSOR_DEVICE_ATTR(temp2_type, S_IRUGO, show_temp_type, NULL, 1);
  static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
  static SENSOR_DEVICE_ATTR(temp3_max, S_IRUGO | S_IWUSR,
  		    show_temp_max, set_temp_max, 2);
  static SENSOR_DEVICE_ATTR(temp3_max_hyst, S_IRUGO | S_IWUSR,
  		    show_temp_hyst, set_temp_hyst, 2);
  static SENSOR_DEVICE_ATTR(temp3_type, S_IRUGO, show_temp_type, NULL, 2);

  /*
   * pwm (value) files are created read-only, write permission is
   * then added or removed dynamically as needed
   */

  static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO, show_pwm, set_pwm, 0);
  static SENSOR_DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR,
  			  show_pwm_enable, set_pwm_enable, 0);

  static SENSOR_DEVICE_ATTR(pwm1_freq, S_IRUGO | S_IWUSR,
  			  show_pwm_freq, set_pwm_freq, 0);

  static SENSOR_DEVICE_ATTR(pwm1_mode, S_IRUGO, show_pwm_mode, NULL, 0);

  static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO, show_pwm, set_pwm, 1);
  static SENSOR_DEVICE_ATTR(pwm2_enable, S_IRUGO | S_IWUSR,
  			  show_pwm_enable, set_pwm_enable, 1);

  static SENSOR_DEVICE_ATTR(pwm2_freq, S_IRUGO | S_IWUSR,
  			  show_pwm_freq, set_pwm_freq, 1);

  static SENSOR_DEVICE_ATTR(pwm2_mode, S_IRUGO, show_pwm_mode, NULL, 1);

  static SENSOR_DEVICE_ATTR(pwm3, S_IRUGO, show_pwm, set_pwm, 2);
  static SENSOR_DEVICE_ATTR(pwm3_enable, S_IRUGO | S_IWUSR,
  			  show_pwm_enable, set_pwm_enable, 2);

  static SENSOR_DEVICE_ATTR(pwm3_freq, S_IRUGO | S_IWUSR,
  			  show_pwm_freq, set_pwm_freq, 2);

  static SENSOR_DEVICE_ATTR(pwm3_mode, S_IRUGO, show_pwm_mode, NULL, 2);

  static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_temp, S_IRUGO | S_IWUSR,
  			    show_pwm_auto_point_temp, set_pwm_auto_point_temp,
  			    0, 0);
  static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_fan, S_IRUGO | S_IWUSR,
  			    show_pwm_auto_point_fan, set_pwm_auto_point_fan,
  			    0, 0);
  static SENSOR_DEVICE_ATTR_2(pwm1_auto_point2_temp, S_IRUGO | S_IWUSR,
  			    show_pwm_auto_point_temp, set_pwm_auto_point_temp,
  			    0, 1);
  static SENSOR_DEVICE_ATTR_2(pwm1_auto_point2_fan, S_IRUGO | S_IWUSR,
  			    show_pwm_auto_point_fan, set_pwm_auto_point_fan,
  			    0, 1);
  static SENSOR_DEVICE_ATTR_2(pwm1_auto_point3_temp, S_IRUGO | S_IWUSR,
  			    show_pwm_auto_point_temp, set_pwm_auto_point_temp,
  			    0, 2);
  static SENSOR_DEVICE_ATTR_2(pwm1_auto_point3_fan, S_IRUGO | S_IWUSR,
  			    show_pwm_auto_point_fan, set_pwm_auto_point_fan,
  			    0, 2);
  
  static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_temp, S_IRUGO | S_IWUSR,
  			    show_pwm_auto_point_temp, set_pwm_auto_point_temp,
  			    1, 0);
  static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_fan, S_IRUGO | S_IWUSR,
  			    show_pwm_auto_point_fan, set_pwm_auto_point_fan,
  			    1, 0);
  static SENSOR_DEVICE_ATTR_2(pwm2_auto_point2_temp, S_IRUGO | S_IWUSR,
  			    show_pwm_auto_point_temp, set_pwm_auto_point_temp,
  			    1, 1);
  static SENSOR_DEVICE_ATTR_2(pwm2_auto_point2_fan, S_IRUGO | S_IWUSR,
  			    show_pwm_auto_point_fan, set_pwm_auto_point_fan,
  			    1, 1);
  static SENSOR_DEVICE_ATTR_2(pwm2_auto_point3_temp, S_IRUGO | S_IWUSR,
  			    show_pwm_auto_point_temp, set_pwm_auto_point_temp,
  			    1, 2);
  static SENSOR_DEVICE_ATTR_2(pwm2_auto_point3_fan, S_IRUGO | S_IWUSR,
  			    show_pwm_auto_point_fan, set_pwm_auto_point_fan,
  			    1, 2);
  
  static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_temp, S_IRUGO | S_IWUSR,
  			    show_pwm_auto_point_temp, set_pwm_auto_point_temp,
  			    2, 0);
  static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_fan, S_IRUGO | S_IWUSR,
  			    show_pwm_auto_point_fan, set_pwm_auto_point_fan,
  			    2, 0);
  static SENSOR_DEVICE_ATTR_2(pwm3_auto_point2_temp, S_IRUGO | S_IWUSR,
  			    show_pwm_auto_point_temp, set_pwm_auto_point_temp,
  			    2, 1);
  static SENSOR_DEVICE_ATTR_2(pwm3_auto_point2_fan, S_IRUGO | S_IWUSR,
  			    show_pwm_auto_point_fan, set_pwm_auto_point_fan,
  			    2, 1);
  static SENSOR_DEVICE_ATTR_2(pwm3_auto_point3_temp, S_IRUGO | S_IWUSR,
  			    show_pwm_auto_point_temp, set_pwm_auto_point_temp,
  			    2, 2);
  static SENSOR_DEVICE_ATTR_2(pwm3_auto_point3_fan, S_IRUGO | S_IWUSR,
  			    show_pwm_auto_point_fan, set_pwm_auto_point_fan,
  			    2, 2);

  static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
  static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
  static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
  static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
  static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 4);
  static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 5);
  static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 6);
  static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 7);
  static SENSOR_DEVICE_ATTR(in8_alarm, S_IRUGO, show_alarm, NULL, 8);

  static SENSOR_DEVICE_ATTR(in9_alarm, S_IRUGO, show_alarm, NULL, 9);
  static SENSOR_DEVICE_ATTR(in10_alarm, S_IRUGO, show_alarm, NULL, 10);

  static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 11);
  static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 12);
  static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 13);
  static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 16);
  static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 17);
  static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 18);
  static DEVICE_ATTR(alarms_in, S_IRUGO, show_alarms_in, NULL);
  static DEVICE_ATTR(alarms_fan, S_IRUGO, show_alarms_fan, NULL);
  static DEVICE_ATTR(alarms_temp, S_IRUGO, show_alarms_temp, NULL);
  
  static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
  
  static struct attribute *f71805f_attributes[] = {

  	&sensor_dev_attr_in0_input.dev_attr.attr,
  	&sensor_dev_attr_in0_max.dev_attr.attr,
  	&sensor_dev_attr_in0_min.dev_attr.attr,

  	&sensor_dev_attr_in1_input.dev_attr.attr,
  	&sensor_dev_attr_in1_max.dev_attr.attr,
  	&sensor_dev_attr_in1_min.dev_attr.attr,
  	&sensor_dev_attr_in2_input.dev_attr.attr,
  	&sensor_dev_attr_in2_max.dev_attr.attr,
  	&sensor_dev_attr_in2_min.dev_attr.attr,
  	&sensor_dev_attr_in3_input.dev_attr.attr,
  	&sensor_dev_attr_in3_max.dev_attr.attr,
  	&sensor_dev_attr_in3_min.dev_attr.attr,

  	&sensor_dev_attr_in5_input.dev_attr.attr,
  	&sensor_dev_attr_in5_max.dev_attr.attr,
  	&sensor_dev_attr_in5_min.dev_attr.attr,
  	&sensor_dev_attr_in6_input.dev_attr.attr,
  	&sensor_dev_attr_in6_max.dev_attr.attr,
  	&sensor_dev_attr_in6_min.dev_attr.attr,
  	&sensor_dev_attr_in7_input.dev_attr.attr,
  	&sensor_dev_attr_in7_max.dev_attr.attr,
  	&sensor_dev_attr_in7_min.dev_attr.attr,

  	&sensor_dev_attr_fan1_input.dev_attr.attr,
  	&sensor_dev_attr_fan1_min.dev_attr.attr,
  	&sensor_dev_attr_fan1_alarm.dev_attr.attr,
  	&sensor_dev_attr_fan1_target.dev_attr.attr,
  	&sensor_dev_attr_fan2_input.dev_attr.attr,
  	&sensor_dev_attr_fan2_min.dev_attr.attr,
  	&sensor_dev_attr_fan2_alarm.dev_attr.attr,
  	&sensor_dev_attr_fan2_target.dev_attr.attr,
  	&sensor_dev_attr_fan3_input.dev_attr.attr,
  	&sensor_dev_attr_fan3_min.dev_attr.attr,
  	&sensor_dev_attr_fan3_alarm.dev_attr.attr,
  	&sensor_dev_attr_fan3_target.dev_attr.attr,
  
  	&sensor_dev_attr_pwm1.dev_attr.attr,
  	&sensor_dev_attr_pwm1_enable.dev_attr.attr,
  	&sensor_dev_attr_pwm1_mode.dev_attr.attr,
  	&sensor_dev_attr_pwm2.dev_attr.attr,
  	&sensor_dev_attr_pwm2_enable.dev_attr.attr,
  	&sensor_dev_attr_pwm2_mode.dev_attr.attr,
  	&sensor_dev_attr_pwm3.dev_attr.attr,
  	&sensor_dev_attr_pwm3_enable.dev_attr.attr,
  	&sensor_dev_attr_pwm3_mode.dev_attr.attr,

  	&sensor_dev_attr_temp1_input.dev_attr.attr,
  	&sensor_dev_attr_temp1_max.dev_attr.attr,
  	&sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
  	&sensor_dev_attr_temp1_type.dev_attr.attr,
  	&sensor_dev_attr_temp2_input.dev_attr.attr,
  	&sensor_dev_attr_temp2_max.dev_attr.attr,
  	&sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
  	&sensor_dev_attr_temp2_type.dev_attr.attr,
  	&sensor_dev_attr_temp3_input.dev_attr.attr,
  	&sensor_dev_attr_temp3_max.dev_attr.attr,
  	&sensor_dev_attr_temp3_max_hyst.dev_attr.attr,
  	&sensor_dev_attr_temp3_type.dev_attr.attr,

  	&sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
  	&sensor_dev_attr_pwm1_auto_point1_fan.dev_attr.attr,
  	&sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
  	&sensor_dev_attr_pwm1_auto_point2_fan.dev_attr.attr,
  	&sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
  	&sensor_dev_attr_pwm1_auto_point3_fan.dev_attr.attr,
  	&sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
  	&sensor_dev_attr_pwm2_auto_point1_fan.dev_attr.attr,
  	&sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
  	&sensor_dev_attr_pwm2_auto_point2_fan.dev_attr.attr,
  	&sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr,
  	&sensor_dev_attr_pwm2_auto_point3_fan.dev_attr.attr,
  	&sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
  	&sensor_dev_attr_pwm3_auto_point1_fan.dev_attr.attr,
  	&sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
  	&sensor_dev_attr_pwm3_auto_point2_fan.dev_attr.attr,
  	&sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr,
  	&sensor_dev_attr_pwm3_auto_point3_fan.dev_attr.attr,

  	&sensor_dev_attr_in0_alarm.dev_attr.attr,
  	&sensor_dev_attr_in1_alarm.dev_attr.attr,
  	&sensor_dev_attr_in2_alarm.dev_attr.attr,
  	&sensor_dev_attr_in3_alarm.dev_attr.attr,

  	&sensor_dev_attr_in5_alarm.dev_attr.attr,
  	&sensor_dev_attr_in6_alarm.dev_attr.attr,
  	&sensor_dev_attr_in7_alarm.dev_attr.attr,

  	&dev_attr_alarms_in.attr,
  	&sensor_dev_attr_temp1_alarm.dev_attr.attr,
  	&sensor_dev_attr_temp2_alarm.dev_attr.attr,
  	&sensor_dev_attr_temp3_alarm.dev_attr.attr,
  	&dev_attr_alarms_temp.attr,
  	&dev_attr_alarms_fan.attr,
  
  	&dev_attr_name.attr,
  	NULL

  };

  static const struct attribute_group f71805f_group = {
  	.attrs = f71805f_attributes,

  };

  static struct attribute *f71805f_attributes_optin[4][5] = {
  	{
  		&sensor_dev_attr_in4_input.dev_attr.attr,
  		&sensor_dev_attr_in4_max.dev_attr.attr,
  		&sensor_dev_attr_in4_min.dev_attr.attr,
  		&sensor_dev_attr_in4_alarm.dev_attr.attr,
  		NULL
  	}, {
  		&sensor_dev_attr_in8_input.dev_attr.attr,
  		&sensor_dev_attr_in8_max.dev_attr.attr,
  		&sensor_dev_attr_in8_min.dev_attr.attr,
  		&sensor_dev_attr_in8_alarm.dev_attr.attr,
  		NULL
  	}, {
  		&sensor_dev_attr_in9_input.dev_attr.attr,
  		&sensor_dev_attr_in9_max.dev_attr.attr,
  		&sensor_dev_attr_in9_min.dev_attr.attr,
  		&sensor_dev_attr_in9_alarm.dev_attr.attr,
  		NULL
  	}, {
  		&sensor_dev_attr_in10_input.dev_attr.attr,
  		&sensor_dev_attr_in10_max.dev_attr.attr,
  		&sensor_dev_attr_in10_min.dev_attr.attr,
  		&sensor_dev_attr_in10_alarm.dev_attr.attr,
  		NULL
  	}
  };
  
  static const struct attribute_group f71805f_group_optin[4] = {
  	{ .attrs = f71805f_attributes_optin[0] },
  	{ .attrs = f71805f_attributes_optin[1] },
  	{ .attrs = f71805f_attributes_optin[2] },
  	{ .attrs = f71805f_attributes_optin[3] },
  };

  /*
   * We don't include pwm_freq files in the arrays above, because they must be
   * created conditionally (only if pwm_mode is 1 == PWM)
   */

  static struct attribute *f71805f_attributes_pwm_freq[] = {
  	&sensor_dev_attr_pwm1_freq.dev_attr.attr,
  	&sensor_dev_attr_pwm2_freq.dev_attr.attr,
  	&sensor_dev_attr_pwm3_freq.dev_attr.attr,
  	NULL
  };
  
  static const struct attribute_group f71805f_group_pwm_freq = {
  	.attrs = f71805f_attributes_pwm_freq,
  };

  /* We also need an indexed access to pwmN files to toggle writability */
  static struct attribute *f71805f_attr_pwm[] = {
  	&sensor_dev_attr_pwm1.dev_attr.attr,
  	&sensor_dev_attr_pwm2.dev_attr.attr,
  	&sensor_dev_attr_pwm3.dev_attr.attr,
  };

  /*
   * Device registration and initialization
   */

  static void f71805f_init_device(struct f71805f_data *data)

  {
  	u8 reg;
  	int i;
  
  	reg = f71805f_read8(data, F71805F_REG_START);
  	if ((reg & 0x41) != 0x01) {

  		pr_debug("Starting monitoring operations
  ");

  		f71805f_write8(data, F71805F_REG_START, (reg | 0x01) & ~0x40);
  	}

  	/*
  	 * Fan monitoring can be disabled. If it is, we won't be polling
  	 * the register values, and won't create the related sysfs files.
  	 */

  	for (i = 0; i < 3; i++) {

  		data->fan_ctrl[i] = f71805f_read8(data,
  						  F71805F_REG_FAN_CTRL(i));

  		/*
  		 * Clear latch full bit, else "speed mode" fan speed control
  		 * doesn't work
  		 */

  		if (data->fan_ctrl[i] & FAN_CTRL_LATCH_FULL) {
  			data->fan_ctrl[i] &= ~FAN_CTRL_LATCH_FULL;
  			f71805f_write8(data, F71805F_REG_FAN_CTRL(i),
  				       data->fan_ctrl[i]);
  		}

  	}
  }

  static int f71805f_probe(struct platform_device *pdev)

  {

  	struct f71805f_sio_data *sio_data = dev_get_platdata(&pdev->dev);

  	struct f71805f_data *data;
  	struct resource *res;

  	int i, err;

  	static const char * const names[] = {

  		"f71805f",
  		"f71872f",
  	};

  	data = devm_kzalloc(&pdev->dev, sizeof(struct f71805f_data),
  			    GFP_KERNEL);

  	if (!data)

  		return -ENOMEM;

  
  	res = platform_get_resource(pdev, IORESOURCE_IO, 0);

  	if (!devm_request_region(&pdev->dev, res->start + ADDR_REG_OFFSET, 2,
  				 DRVNAME)) {

  		dev_err(&pdev->dev, "Failed to request region 0x%lx-0x%lx
  ",
  			(unsigned long)(res->start + ADDR_REG_OFFSET),
  			(unsigned long)(res->start + ADDR_REG_OFFSET + 1));

  		return -EBUSY;

  	}

  	data->addr = res->start;

  	data->name = names[sio_data->kind];

  	mutex_init(&data->update_lock);

  
  	platform_set_drvdata(pdev, data);

  	/* Some voltage inputs depend on chip model and configuration */
  	switch (sio_data->kind) {
  	case f71805f:
  		data->has_in = 0x1ff;
  		break;
  	case f71872f:
  		data->has_in = 0x6ef;
  		if (sio_data->fnsel1 & 0x01)
  			data->has_in |= (1 << 4); /* in4 */
  		if (sio_data->fnsel1 & 0x02)
  			data->has_in |= (1 << 8); /* in8 */
  		break;
  	}

  	/* Initialize the F71805F chip */
  	f71805f_init_device(data);
  
  	/* Register sysfs interface files */

  	err = sysfs_create_group(&pdev->dev.kobj, &f71805f_group);
  	if (err)

  		return err;

  	if (data->has_in & (1 << 4)) { /* in4 */

  		err = sysfs_create_group(&pdev->dev.kobj,
  					 &f71805f_group_optin[0]);
  		if (err)

  			goto exit_remove_files;
  	}
  	if (data->has_in & (1 << 8)) { /* in8 */

  		err = sysfs_create_group(&pdev->dev.kobj,
  					 &f71805f_group_optin[1]);
  		if (err)

  			goto exit_remove_files;
  	}
  	if (data->has_in & (1 << 9)) { /* in9 (F71872F/FG only) */

  		err = sysfs_create_group(&pdev->dev.kobj,
  					 &f71805f_group_optin[2]);
  		if (err)

  			goto exit_remove_files;
  	}
  	if (data->has_in & (1 << 10)) { /* in9 (F71872F/FG only) */

  		err = sysfs_create_group(&pdev->dev.kobj,
  					 &f71805f_group_optin[3]);
  		if (err)

  			goto exit_remove_files;
  	}

  	for (i = 0; i < 3; i++) {

  		/* If control mode is PWM, create pwm_freq file */
  		if (!(data->fan_ctrl[i] & FAN_CTRL_DC_MODE)) {

  			err = sysfs_create_file(&pdev->dev.kobj,
  						f71805f_attributes_pwm_freq[i]);
  			if (err)

  				goto exit_remove_files;
  		}

  		/* If PWM is in manual mode, add write permission */
  		if (data->fan_ctrl[i] & FAN_CTRL_MODE_MANUAL) {

  			err = sysfs_chmod_file(&pdev->dev.kobj,
  					       f71805f_attr_pwm[i],
  					       S_IRUGO | S_IWUSR);
  			if (err) {

  				dev_err(&pdev->dev, "chmod +w pwm%d failed
  ",
  					i + 1);
  				goto exit_remove_files;
  			}
  		}

  	}

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

  		dev_err(&pdev->dev, "Class registration failed (%d)
  ", err);
  		goto exit_remove_files;

  	}

  
  	return 0;

  exit_remove_files:
  	sysfs_remove_group(&pdev->dev.kobj, &f71805f_group);

  	for (i = 0; i < 4; i++)
  		sysfs_remove_group(&pdev->dev.kobj, &f71805f_group_optin[i]);

  	sysfs_remove_group(&pdev->dev.kobj, &f71805f_group_pwm_freq);

  	return err;
  }

  static int f71805f_remove(struct platform_device *pdev)

  {
  	struct f71805f_data *data = platform_get_drvdata(pdev);

  	int i;

  	hwmon_device_unregister(data->hwmon_dev);

  	sysfs_remove_group(&pdev->dev.kobj, &f71805f_group);

  	for (i = 0; i < 4; i++)
  		sysfs_remove_group(&pdev->dev.kobj, &f71805f_group_optin[i]);

  	sysfs_remove_group(&pdev->dev.kobj, &f71805f_group_pwm_freq);

  	return 0;
  }
  
  static struct platform_driver f71805f_driver = {
  	.driver = {

  		.name	= DRVNAME,
  	},
  	.probe		= f71805f_probe,

  	.remove		= f71805f_remove,

  };

  static int __init f71805f_device_add(unsigned short address,
  				     const struct f71805f_sio_data *sio_data)

  {

  	struct resource res = {
  		.start	= address,
  		.end	= address + REGION_LENGTH - 1,
  		.flags	= IORESOURCE_IO,
  	};

  	int err;
  
  	pdev = platform_device_alloc(DRVNAME, address);
  	if (!pdev) {
  		err = -ENOMEM;

  		pr_err("Device allocation failed
  ");

  		goto exit;
  	}

  	res.name = pdev->name;

  	err = acpi_check_resource_conflict(&res);
  	if (err)
  		goto exit_device_put;

  	err = platform_device_add_resources(pdev, &res, 1);

  	if (err) {

  		pr_err("Device resource addition failed (%d)
  ", err);

  		goto exit_device_put;
  	}

  	err = platform_device_add_data(pdev, sio_data,
  				       sizeof(struct f71805f_sio_data));
  	if (err) {

  		pr_err("Platform data allocation failed
  ");

  		goto exit_device_put;
  	}

  	err = platform_device_add(pdev);
  	if (err) {

  		pr_err("Device addition failed (%d)
  ", err);

  		goto exit_device_put;

  	}
  
  	return 0;
  
  exit_device_put:
  	platform_device_put(pdev);
  exit:
  	return err;
  }

  static int __init f71805f_find(int sioaddr, unsigned short *address,
  			       struct f71805f_sio_data *sio_data)

  {
  	int err = -ENODEV;
  	u16 devid;

  	static const char * const names[] = {

  		"F71805F/FG",

  		"F71872F/FG or F71806F/FG",

  	};

  	superio_enter(sioaddr);
  
  	devid = superio_inw(sioaddr, SIO_REG_MANID);
  	if (devid != SIO_FINTEK_ID)
  		goto exit;

  	devid = force_id ? force_id : superio_inw(sioaddr, SIO_REG_DEVID);

  	switch (devid) {
  	case SIO_F71805F_ID:
  		sio_data->kind = f71805f;
  		break;
  	case SIO_F71872F_ID:
  		sio_data->kind = f71872f;
  		sio_data->fnsel1 = superio_inb(sioaddr, SIO_REG_FNSEL1);
  		break;
  	default:

  		pr_info("Unsupported Fintek device, skipping
  ");

  		goto exit;
  	}
  
  	superio_select(sioaddr, F71805F_LD_HWM);
  	if (!(superio_inb(sioaddr, SIO_REG_ENABLE) & 0x01)) {

  		pr_warn("Device not activated, skipping
  ");

  		goto exit;
  	}
  
  	*address = superio_inw(sioaddr, SIO_REG_ADDR);
  	if (*address == 0) {

  		pr_warn("Base address not set, skipping
  ");

  		goto exit;
  	}

  	*address &= ~(REGION_LENGTH - 1);	/* Ignore 3 LSB */

  
  	err = 0;

  	pr_info("Found %s chip at %#x, revision %u
  ",
  		names[sio_data->kind], *address,
  		superio_inb(sioaddr, SIO_REG_DEVREV));

  
  exit:
  	superio_exit(sioaddr);
  	return err;
  }
  
  static int __init f71805f_init(void)
  {
  	int err;
  	unsigned short address;

  	struct f71805f_sio_data sio_data;

  	if (f71805f_find(0x2e, &address, &sio_data)
  	 && f71805f_find(0x4e, &address, &sio_data))

  		return -ENODEV;
  
  	err = platform_driver_register(&f71805f_driver);
  	if (err)
  		goto exit;
  
  	/* Sets global pdev as a side effect */

  	err = f71805f_device_add(address, &sio_data);

  	if (err)
  		goto exit_driver;
  
  	return 0;
  
  exit_driver:
  	platform_driver_unregister(&f71805f_driver);
  exit:
  	return err;
  }
  
  static void __exit f71805f_exit(void)
  {
  	platform_device_unregister(pdev);
  	platform_driver_unregister(&f71805f_driver);
  }

  MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>");

  MODULE_LICENSE("GPL");

  MODULE_DESCRIPTION("F71805F/F71872F hardware monitoring driver");

  
  module_init(f71805f_init);
  module_exit(f71805f_exit);