// SPDX-License-Identifier: GPL-2.0-or-later

  /*
   * A hwmon driver for the Analog Devices ADT7462
   * Copyright (C) 2008 IBM
   *

   * Author: Darrick J. Wong <darrick.wong@oracle.com>

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

  #include <linux/log2.h>

  #include <linux/slab.h>

  
  /* Addresses to scan */
  static const unsigned short normal_i2c[] = { 0x58, 0x5C, I2C_CLIENT_END };

  /* ADT7462 registers */
  #define ADT7462_REG_DEVICE			0x3D
  #define ADT7462_REG_VENDOR			0x3E
  #define ADT7462_REG_REVISION			0x3F
  
  #define ADT7462_REG_MIN_TEMP_BASE_ADDR		0x44
  #define ADT7462_REG_MIN_TEMP_MAX_ADDR		0x47
  #define ADT7462_REG_MAX_TEMP_BASE_ADDR		0x48
  #define ADT7462_REG_MAX_TEMP_MAX_ADDR		0x4B
  #define ADT7462_REG_TEMP_BASE_ADDR		0x88
  #define ADT7462_REG_TEMP_MAX_ADDR		0x8F
  
  #define ADT7462_REG_FAN_BASE_ADDR		0x98
  #define ADT7462_REG_FAN_MAX_ADDR		0x9F
  #define ADT7462_REG_FAN2_BASE_ADDR		0xA2
  #define ADT7462_REG_FAN2_MAX_ADDR		0xA9
  #define ADT7462_REG_FAN_ENABLE			0x07
  #define ADT7462_REG_FAN_MIN_BASE_ADDR		0x78
  #define ADT7462_REG_FAN_MIN_MAX_ADDR		0x7F
  
  #define ADT7462_REG_CFG2			0x02
  #define		ADT7462_FSPD_MASK		0x20
  
  #define ADT7462_REG_PWM_BASE_ADDR		0xAA
  #define ADT7462_REG_PWM_MAX_ADDR		0xAD
  #define	ADT7462_REG_PWM_MIN_BASE_ADDR		0x28
  #define ADT7462_REG_PWM_MIN_MAX_ADDR		0x2B
  #define ADT7462_REG_PWM_MAX			0x2C
  #define ADT7462_REG_PWM_TEMP_MIN_BASE_ADDR	0x5C
  #define ADT7462_REG_PWM_TEMP_MIN_MAX_ADDR	0x5F
  #define ADT7462_REG_PWM_TEMP_RANGE_BASE_ADDR	0x60
  #define ADT7462_REG_PWM_TEMP_RANGE_MAX_ADDR	0x63

  #define	ADT7462_PWM_HYST_MASK			0x0F
  #define	ADT7462_PWM_RANGE_MASK			0xF0

  #define		ADT7462_PWM_RANGE_SHIFT		4
  #define ADT7462_REG_PWM_CFG_BASE_ADDR		0x21
  #define ADT7462_REG_PWM_CFG_MAX_ADDR		0x24
  #define		ADT7462_PWM_CHANNEL_MASK	0xE0
  #define		ADT7462_PWM_CHANNEL_SHIFT	5
  
  #define ADT7462_REG_PIN_CFG_BASE_ADDR		0x10
  #define ADT7462_REG_PIN_CFG_MAX_ADDR		0x13
  #define		ADT7462_PIN7_INPUT		0x01	/* cfg0 */
  #define		ADT7462_DIODE3_INPUT		0x20
  #define		ADT7462_DIODE1_INPUT		0x40
  #define		ADT7462_VID_INPUT		0x80
  #define		ADT7462_PIN22_INPUT		0x04	/* cfg1 */
  #define		ADT7462_PIN21_INPUT		0x08
  #define		ADT7462_PIN19_INPUT		0x10
  #define		ADT7462_PIN15_INPUT		0x20
  #define		ADT7462_PIN13_INPUT		0x40
  #define		ADT7462_PIN8_INPUT		0x80

  #define		ADT7462_PIN23_MASK		0x03

  #define		ADT7462_PIN23_SHIFT		0
  #define		ADT7462_PIN26_MASK		0x0C	/* cfg2 */
  #define		ADT7462_PIN26_SHIFT		2
  #define		ADT7462_PIN25_MASK		0x30
  #define		ADT7462_PIN25_SHIFT		4
  #define		ADT7462_PIN24_MASK		0xC0
  #define		ADT7462_PIN24_SHIFT		6
  #define		ADT7462_PIN26_VOLT_INPUT	0x08
  #define		ADT7462_PIN25_VOLT_INPUT	0x20

  #define		ADT7462_PIN28_SHIFT		4	/* cfg3 */

  #define		ADT7462_PIN28_VOLT		0x5
  
  #define ADT7462_REG_ALARM1			0xB8

  #define	ADT7462_LT_ALARM			0x02

  #define		ADT7462_R1T_ALARM		0x04
  #define		ADT7462_R2T_ALARM		0x08
  #define		ADT7462_R3T_ALARM		0x10
  #define ADT7462_REG_ALARM2			0xBB
  #define		ADT7462_V0_ALARM		0x01
  #define		ADT7462_V1_ALARM		0x02
  #define		ADT7462_V2_ALARM		0x04
  #define		ADT7462_V3_ALARM		0x08
  #define		ADT7462_V4_ALARM		0x10
  #define		ADT7462_V5_ALARM		0x20
  #define		ADT7462_V6_ALARM		0x40
  #define		ADT7462_V7_ALARM		0x80
  #define ADT7462_REG_ALARM3			0xBC
  #define		ADT7462_V8_ALARM		0x08
  #define		ADT7462_V9_ALARM		0x10
  #define		ADT7462_V10_ALARM		0x20
  #define		ADT7462_V11_ALARM		0x40
  #define		ADT7462_V12_ALARM		0x80
  #define ADT7462_REG_ALARM4			0xBD
  #define		ADT7462_F0_ALARM		0x01
  #define		ADT7462_F1_ALARM		0x02
  #define		ADT7462_F2_ALARM		0x04
  #define		ADT7462_F3_ALARM		0x08
  #define		ADT7462_F4_ALARM		0x10
  #define		ADT7462_F5_ALARM		0x20
  #define		ADT7462_F6_ALARM		0x40
  #define		ADT7462_F7_ALARM		0x80
  #define ADT7462_ALARM1				0x0000
  #define ADT7462_ALARM2				0x0100
  #define ADT7462_ALARM3				0x0200
  #define ADT7462_ALARM4				0x0300
  #define ADT7462_ALARM_REG_SHIFT			8
  #define ADT7462_ALARM_FLAG_MASK			0x0F
  
  #define ADT7462_TEMP_COUNT		4

  #define ADT7462_TEMP_REG(x)		(ADT7462_REG_TEMP_BASE_ADDR + ((x) * 2))
  #define ADT7462_TEMP_MIN_REG(x)		(ADT7462_REG_MIN_TEMP_BASE_ADDR + (x))
  #define ADT7462_TEMP_MAX_REG(x)		(ADT7462_REG_MAX_TEMP_BASE_ADDR + (x))

  #define TEMP_FRAC_OFFSET		6
  
  #define ADT7462_FAN_COUNT		8
  #define ADT7462_REG_FAN_MIN(x)		(ADT7462_REG_FAN_MIN_BASE_ADDR + (x))
  
  #define ADT7462_PWM_COUNT		4
  #define ADT7462_REG_PWM(x)		(ADT7462_REG_PWM_BASE_ADDR + (x))
  #define ADT7462_REG_PWM_MIN(x)		(ADT7462_REG_PWM_MIN_BASE_ADDR + (x))
  #define ADT7462_REG_PWM_TMIN(x)		\
  	(ADT7462_REG_PWM_TEMP_MIN_BASE_ADDR + (x))
  #define ADT7462_REG_PWM_TRANGE(x)	\
  	(ADT7462_REG_PWM_TEMP_RANGE_BASE_ADDR + (x))
  
  #define ADT7462_PIN_CFG_REG_COUNT	4
  #define ADT7462_REG_PIN_CFG(x)		(ADT7462_REG_PIN_CFG_BASE_ADDR + (x))
  #define ADT7462_REG_PWM_CFG(x)		(ADT7462_REG_PWM_CFG_BASE_ADDR + (x))
  
  #define ADT7462_ALARM_REG_COUNT		4
  
  /*
   * The chip can measure 13 different voltage sources:
   *
   * 1. +12V1 (pin 7)
   * 2. Vccp1/+2.5V/+1.8V/+1.5V (pin 23)
   * 3. +12V3 (pin 22)
   * 4. +5V (pin 21)
   * 5. +1.25V/+0.9V (pin 19)
   * 6. +2.5V/+1.8V (pin 15)
   * 7. +3.3v (pin 13)
   * 8. +12V2 (pin 8)
   * 9. Vbatt/FSB_Vtt (pin 26)
   * A. +3.3V/+1.2V1 (pin 25)
   * B. Vccp2/+2.5V/+1.8V/+1.5V (pin 24)
   * C. +1.5V ICH (only if BOTH pin 28/29 are set to +1.5V)
   * D. +1.5V 3GPIO (only if BOTH pin 28/29 are set to +1.5V)
   *
   * Each of these 13 has a factor to convert raw to voltage.  Even better,
   * the pins can be connected to other sensors (tach/gpio/hot/etc), which
   * makes the bookkeeping tricky.
   *
   * Some, but not all, of these voltages have low/high limits.
   */

  #define ADT7462_VOLT_COUNT	13

  
  #define ADT7462_VENDOR		0x41
  #define ADT7462_DEVICE		0x62
  /* datasheet only mentions a revision 4 */
  #define ADT7462_REVISION	0x04
  
  /* How often do we reread sensors values? (In jiffies) */
  #define SENSOR_REFRESH_INTERVAL	(2 * HZ)
  
  /* How often do we reread sensor limit values? (In jiffies) */
  #define LIMIT_REFRESH_INTERVAL	(60 * HZ)
  
  /* datasheet says to divide this number by the fan reading to get fan rpm */
  #define FAN_PERIOD_TO_RPM(x)	((90000 * 60) / (x))
  #define FAN_RPM_TO_PERIOD	FAN_PERIOD_TO_RPM
  #define FAN_PERIOD_INVALID	65535
  #define FAN_DATA_VALID(x)	((x) && (x) != FAN_PERIOD_INVALID)
  
  #define MASK_AND_SHIFT(value, prefix)	\
  	(((value) & prefix##_MASK) >> prefix##_SHIFT)

  struct adt7462_data {

  	struct i2c_client	*client;

  	struct mutex		lock;
  	char			sensors_valid;
  	char			limits_valid;
  	unsigned long		sensors_last_updated;	/* In jiffies */
  	unsigned long		limits_last_updated;	/* In jiffies */
  
  	u8			temp[ADT7462_TEMP_COUNT];
  				/* bits 6-7 are quarter pieces of temp */
  	u8			temp_frac[ADT7462_TEMP_COUNT];
  	u8			temp_min[ADT7462_TEMP_COUNT];
  	u8			temp_max[ADT7462_TEMP_COUNT];
  	u16			fan[ADT7462_FAN_COUNT];
  	u8			fan_enabled;
  	u8			fan_min[ADT7462_FAN_COUNT];
  	u8			cfg2;
  	u8			pwm[ADT7462_PWM_COUNT];
  	u8			pin_cfg[ADT7462_PIN_CFG_REG_COUNT];
  	u8			voltages[ADT7462_VOLT_COUNT];
  	u8			volt_max[ADT7462_VOLT_COUNT];
  	u8			volt_min[ADT7462_VOLT_COUNT];
  	u8			pwm_min[ADT7462_PWM_COUNT];
  	u8			pwm_tmin[ADT7462_PWM_COUNT];
  	u8			pwm_trange[ADT7462_PWM_COUNT];
  	u8			pwm_max;	/* only one per chip */
  	u8			pwm_cfg[ADT7462_PWM_COUNT];
  	u8			alarms[ADT7462_ALARM_REG_COUNT];
  };

  /*
   * 16-bit registers on the ADT7462 are low-byte first.  The data sheet says
   * that the low byte must be read before the high byte.
   */
  static inline int adt7462_read_word_data(struct i2c_client *client, u8 reg)
  {
  	u16 foo;
  	foo = i2c_smbus_read_byte_data(client, reg);
  	foo |= ((u16)i2c_smbus_read_byte_data(client, reg + 1) << 8);
  	return foo;
  }
  
  /* For some reason these registers are not contiguous. */
  static int ADT7462_REG_FAN(int fan)
  {
  	if (fan < 4)
  		return ADT7462_REG_FAN_BASE_ADDR + (2 * fan);
  	return ADT7462_REG_FAN2_BASE_ADDR + (2 * (fan - 4));
  }
  
  /* Voltage registers are scattered everywhere */
  static int ADT7462_REG_VOLT_MAX(struct adt7462_data *data, int which)
  {
  	switch (which) {
  	case 0:
  		if (!(data->pin_cfg[0] & ADT7462_PIN7_INPUT))
  			return 0x7C;
  		break;
  	case 1:
  		return 0x69;
  	case 2:
  		if (!(data->pin_cfg[1] & ADT7462_PIN22_INPUT))
  			return 0x7F;
  		break;
  	case 3:
  		if (!(data->pin_cfg[1] & ADT7462_PIN21_INPUT))
  			return 0x7E;
  		break;
  	case 4:
  		if (!(data->pin_cfg[0] & ADT7462_DIODE3_INPUT))
  			return 0x4B;
  		break;
  	case 5:
  		if (!(data->pin_cfg[0] & ADT7462_DIODE1_INPUT))
  			return 0x49;
  		break;
  	case 6:
  		if (!(data->pin_cfg[1] & ADT7462_PIN13_INPUT))
  			return 0x68;
  		break;
  	case 7:
  		if (!(data->pin_cfg[1] & ADT7462_PIN8_INPUT))
  			return 0x7D;
  		break;
  	case 8:
  		if (!(data->pin_cfg[2] & ADT7462_PIN26_VOLT_INPUT))
  			return 0x6C;
  		break;
  	case 9:
  		if (!(data->pin_cfg[2] & ADT7462_PIN25_VOLT_INPUT))
  			return 0x6B;
  		break;
  	case 10:
  		return 0x6A;
  	case 11:
  		if (data->pin_cfg[3] >> ADT7462_PIN28_SHIFT ==
  					ADT7462_PIN28_VOLT &&
  		    !(data->pin_cfg[0] & ADT7462_VID_INPUT))
  			return 0x50;
  		break;
  	case 12:
  		if (data->pin_cfg[3] >> ADT7462_PIN28_SHIFT ==
  					ADT7462_PIN28_VOLT &&
  		    !(data->pin_cfg[0] & ADT7462_VID_INPUT))
  			return 0x4C;
  		break;
  	}

  	return 0;

  }
  
  static int ADT7462_REG_VOLT_MIN(struct adt7462_data *data, int which)
  {
  	switch (which) {
  	case 0:
  		if (!(data->pin_cfg[0] & ADT7462_PIN7_INPUT))
  			return 0x6D;
  		break;
  	case 1:
  		return 0x72;
  	case 2:
  		if (!(data->pin_cfg[1] & ADT7462_PIN22_INPUT))
  			return 0x6F;
  		break;
  	case 3:
  		if (!(data->pin_cfg[1] & ADT7462_PIN21_INPUT))
  			return 0x71;
  		break;
  	case 4:
  		if (!(data->pin_cfg[0] & ADT7462_DIODE3_INPUT))
  			return 0x47;
  		break;
  	case 5:
  		if (!(data->pin_cfg[0] & ADT7462_DIODE1_INPUT))
  			return 0x45;
  		break;
  	case 6:
  		if (!(data->pin_cfg[1] & ADT7462_PIN13_INPUT))
  			return 0x70;
  		break;
  	case 7:
  		if (!(data->pin_cfg[1] & ADT7462_PIN8_INPUT))
  			return 0x6E;
  		break;
  	case 8:
  		if (!(data->pin_cfg[2] & ADT7462_PIN26_VOLT_INPUT))
  			return 0x75;
  		break;
  	case 9:
  		if (!(data->pin_cfg[2] & ADT7462_PIN25_VOLT_INPUT))
  			return 0x74;
  		break;
  	case 10:
  		return 0x73;
  	case 11:
  		if (data->pin_cfg[3] >> ADT7462_PIN28_SHIFT ==
  					ADT7462_PIN28_VOLT &&
  		    !(data->pin_cfg[0] & ADT7462_VID_INPUT))
  			return 0x76;
  		break;
  	case 12:
  		if (data->pin_cfg[3] >> ADT7462_PIN28_SHIFT ==
  					ADT7462_PIN28_VOLT &&
  		    !(data->pin_cfg[0] & ADT7462_VID_INPUT))
  			return 0x77;
  		break;
  	}

  	return 0;

  }
  
  static int ADT7462_REG_VOLT(struct adt7462_data *data, int which)
  {
  	switch (which) {
  	case 0:
  		if (!(data->pin_cfg[0] & ADT7462_PIN7_INPUT))
  			return 0xA3;
  		break;
  	case 1:
  		return 0x90;
  	case 2:
  		if (!(data->pin_cfg[1] & ADT7462_PIN22_INPUT))
  			return 0xA9;
  		break;
  	case 3:
  		if (!(data->pin_cfg[1] & ADT7462_PIN21_INPUT))
  			return 0xA7;
  		break;
  	case 4:
  		if (!(data->pin_cfg[0] & ADT7462_DIODE3_INPUT))
  			return 0x8F;
  		break;
  	case 5:
  		if (!(data->pin_cfg[0] & ADT7462_DIODE1_INPUT))
  			return 0x8B;
  		break;
  	case 6:
  		if (!(data->pin_cfg[1] & ADT7462_PIN13_INPUT))
  			return 0x96;
  		break;
  	case 7:
  		if (!(data->pin_cfg[1] & ADT7462_PIN8_INPUT))
  			return 0xA5;
  		break;
  	case 8:
  		if (!(data->pin_cfg[2] & ADT7462_PIN26_VOLT_INPUT))
  			return 0x93;
  		break;
  	case 9:
  		if (!(data->pin_cfg[2] & ADT7462_PIN25_VOLT_INPUT))
  			return 0x92;
  		break;
  	case 10:
  		return 0x91;
  	case 11:
  		if (data->pin_cfg[3] >> ADT7462_PIN28_SHIFT ==
  					ADT7462_PIN28_VOLT &&
  		    !(data->pin_cfg[0] & ADT7462_VID_INPUT))
  			return 0x94;
  		break;
  	case 12:
  		if (data->pin_cfg[3] >> ADT7462_PIN28_SHIFT ==
  					ADT7462_PIN28_VOLT &&
  		    !(data->pin_cfg[0] & ADT7462_VID_INPUT))
  			return 0x95;
  		break;
  	}

  	return 0;

  }
  
  /* Provide labels for sysfs */
  static const char *voltage_label(struct adt7462_data *data, int which)
  {
  	switch (which) {
  	case 0:
  		if (!(data->pin_cfg[0] & ADT7462_PIN7_INPUT))
  			return "+12V1";
  		break;
  	case 1:
  		switch (MASK_AND_SHIFT(data->pin_cfg[1], ADT7462_PIN23)) {
  		case 0:
  			return "Vccp1";
  		case 1:
  			return "+2.5V";
  		case 2:
  			return "+1.8V";
  		case 3:
  			return "+1.5V";
  		}

  		fallthrough;

  	case 2:
  		if (!(data->pin_cfg[1] & ADT7462_PIN22_INPUT))
  			return "+12V3";
  		break;
  	case 3:
  		if (!(data->pin_cfg[1] & ADT7462_PIN21_INPUT))
  			return "+5V";
  		break;
  	case 4:
  		if (!(data->pin_cfg[0] & ADT7462_DIODE3_INPUT)) {
  			if (data->pin_cfg[1] & ADT7462_PIN19_INPUT)
  				return "+0.9V";
  			return "+1.25V";
  		}
  		break;
  	case 5:
  		if (!(data->pin_cfg[0] & ADT7462_DIODE1_INPUT)) {
  			if (data->pin_cfg[1] & ADT7462_PIN19_INPUT)
  				return "+1.8V";
  			return "+2.5V";
  		}
  		break;
  	case 6:
  		if (!(data->pin_cfg[1] & ADT7462_PIN13_INPUT))
  			return "+3.3V";
  		break;
  	case 7:
  		if (!(data->pin_cfg[1] & ADT7462_PIN8_INPUT))
  			return "+12V2";
  		break;
  	case 8:
  		switch (MASK_AND_SHIFT(data->pin_cfg[2], ADT7462_PIN26)) {
  		case 0:
  			return "Vbatt";
  		case 1:
  			return "FSB_Vtt";
  		}
  		break;
  	case 9:
  		switch (MASK_AND_SHIFT(data->pin_cfg[2], ADT7462_PIN25)) {
  		case 0:
  			return "+3.3V";
  		case 1:
  			return "+1.2V1";
  		}
  		break;
  	case 10:
  		switch (MASK_AND_SHIFT(data->pin_cfg[2], ADT7462_PIN24)) {
  		case 0:
  			return "Vccp2";
  		case 1:
  			return "+2.5V";
  		case 2:
  			return "+1.8V";
  		case 3:
  			return "+1.5";
  		}

  		fallthrough;

  	case 11:
  		if (data->pin_cfg[3] >> ADT7462_PIN28_SHIFT ==
  					ADT7462_PIN28_VOLT &&
  		    !(data->pin_cfg[0] & ADT7462_VID_INPUT))
  			return "+1.5V ICH";
  		break;
  	case 12:
  		if (data->pin_cfg[3] >> ADT7462_PIN28_SHIFT ==
  					ADT7462_PIN28_VOLT &&
  		    !(data->pin_cfg[0] & ADT7462_VID_INPUT))
  			return "+1.5V 3GPIO";
  		break;
  	}
  	return "N/A";
  }
  
  /* Multipliers are actually in uV, not mV. */
  static int voltage_multiplier(struct adt7462_data *data, int which)
  {
  	switch (which) {
  	case 0:
  		if (!(data->pin_cfg[0] & ADT7462_PIN7_INPUT))
  			return 62500;
  		break;
  	case 1:
  		switch (MASK_AND_SHIFT(data->pin_cfg[1], ADT7462_PIN23)) {
  		case 0:
  			if (data->pin_cfg[0] & ADT7462_VID_INPUT)
  				return 12500;
  			return 6250;
  		case 1:
  			return 13000;
  		case 2:
  			return 9400;
  		case 3:
  			return 7800;
  		}

  		fallthrough;

  	case 2:
  		if (!(data->pin_cfg[1] & ADT7462_PIN22_INPUT))
  			return 62500;
  		break;
  	case 3:
  		if (!(data->pin_cfg[1] & ADT7462_PIN21_INPUT))
  			return 26000;
  		break;
  	case 4:
  		if (!(data->pin_cfg[0] & ADT7462_DIODE3_INPUT)) {
  			if (data->pin_cfg[1] & ADT7462_PIN19_INPUT)
  				return 4690;
  			return 6500;
  		}
  		break;
  	case 5:
  		if (!(data->pin_cfg[0] & ADT7462_DIODE1_INPUT)) {
  			if (data->pin_cfg[1] & ADT7462_PIN15_INPUT)
  				return 9400;
  			return 13000;
  		}
  		break;
  	case 6:
  		if (!(data->pin_cfg[1] & ADT7462_PIN13_INPUT))
  			return 17200;
  		break;
  	case 7:
  		if (!(data->pin_cfg[1] & ADT7462_PIN8_INPUT))
  			return 62500;
  		break;
  	case 8:
  		switch (MASK_AND_SHIFT(data->pin_cfg[2], ADT7462_PIN26)) {
  		case 0:
  			return 15600;
  		case 1:
  			return 6250;
  		}
  		break;
  	case 9:
  		switch (MASK_AND_SHIFT(data->pin_cfg[2], ADT7462_PIN25)) {
  		case 0:
  			return 17200;
  		case 1:
  			return 6250;
  		}
  		break;
  	case 10:
  		switch (MASK_AND_SHIFT(data->pin_cfg[2], ADT7462_PIN24)) {
  		case 0:
  			return 6250;
  		case 1:
  			return 13000;
  		case 2:
  			return 9400;
  		case 3:
  			return 7800;
  		}

  		fallthrough;

  	case 11:
  	case 12:
  		if (data->pin_cfg[3] >> ADT7462_PIN28_SHIFT ==
  					ADT7462_PIN28_VOLT &&
  		    !(data->pin_cfg[0] & ADT7462_VID_INPUT))
  			return 7800;
  	}
  	return 0;
  }
  
  static int temp_enabled(struct adt7462_data *data, int which)
  {
  	switch (which) {
  	case 0:
  	case 2:
  		return 1;
  	case 1:
  		if (data->pin_cfg[0] & ADT7462_DIODE1_INPUT)
  			return 1;
  		break;
  	case 3:
  		if (data->pin_cfg[0] & ADT7462_DIODE3_INPUT)
  			return 1;
  		break;
  	}
  	return 0;
  }
  
  static const char *temp_label(struct adt7462_data *data, int which)
  {
  	switch (which) {
  	case 0:
  		return "local";
  	case 1:
  		if (data->pin_cfg[0] & ADT7462_DIODE1_INPUT)
  			return "remote1";
  		break;
  	case 2:
  		return "remote2";
  	case 3:
  		if (data->pin_cfg[0] & ADT7462_DIODE3_INPUT)
  			return "remote3";
  		break;
  	}
  	return "N/A";
  }
  
  /* Map Trange register values to mC */
  #define NUM_TRANGE_VALUES	16
  static const int trange_values[NUM_TRANGE_VALUES] = {
  	2000,
  	2500,
  	3300,
  	4000,
  	5000,
  	6700,
  	8000,
  	10000,
  	13300,
  	16000,
  	20000,
  	26700,
  	32000,
  	40000,
  	53300,
  	80000
  };
  
  static int find_trange_value(int trange)
  {
  	int i;
  
  	for (i = 0; i < NUM_TRANGE_VALUES; i++)
  		if (trange_values[i] == trange)
  			return i;

  	return -EINVAL;

  }
  
  static struct adt7462_data *adt7462_update_device(struct device *dev)
  {

  	struct adt7462_data *data = dev_get_drvdata(dev);
  	struct i2c_client *client = data->client;

  	unsigned long local_jiffies = jiffies;
  	int i;
  
  	mutex_lock(&data->lock);
  	if (time_before(local_jiffies, data->sensors_last_updated +
  		SENSOR_REFRESH_INTERVAL)
  		&& data->sensors_valid)
  		goto no_sensor_update;
  
  	for (i = 0; i < ADT7462_TEMP_COUNT; i++) {
  		/*
  		 * Reading the fractional register locks the integral
  		 * register until both have been read.
  		 */
  		data->temp_frac[i] = i2c_smbus_read_byte_data(client,
  						ADT7462_TEMP_REG(i));
  		data->temp[i] = i2c_smbus_read_byte_data(client,
  						ADT7462_TEMP_REG(i) + 1);
  	}
  
  	for (i = 0; i < ADT7462_FAN_COUNT; i++)
  		data->fan[i] = adt7462_read_word_data(client,
  						ADT7462_REG_FAN(i));
  
  	data->fan_enabled = i2c_smbus_read_byte_data(client,
  					ADT7462_REG_FAN_ENABLE);
  
  	for (i = 0; i < ADT7462_PWM_COUNT; i++)
  		data->pwm[i] = i2c_smbus_read_byte_data(client,
  						ADT7462_REG_PWM(i));
  
  	for (i = 0; i < ADT7462_PIN_CFG_REG_COUNT; i++)
  		data->pin_cfg[i] = i2c_smbus_read_byte_data(client,
  				ADT7462_REG_PIN_CFG(i));
  
  	for (i = 0; i < ADT7462_VOLT_COUNT; i++) {
  		int reg = ADT7462_REG_VOLT(data, i);
  		if (!reg)
  			data->voltages[i] = 0;
  		else
  			data->voltages[i] = i2c_smbus_read_byte_data(client,
  								     reg);
  	}
  
  	data->alarms[0] = i2c_smbus_read_byte_data(client, ADT7462_REG_ALARM1);
  	data->alarms[1] = i2c_smbus_read_byte_data(client, ADT7462_REG_ALARM2);
  	data->alarms[2] = i2c_smbus_read_byte_data(client, ADT7462_REG_ALARM3);
  	data->alarms[3] = i2c_smbus_read_byte_data(client, ADT7462_REG_ALARM4);
  
  	data->sensors_last_updated = local_jiffies;
  	data->sensors_valid = 1;
  
  no_sensor_update:
  	if (time_before(local_jiffies, data->limits_last_updated +
  		LIMIT_REFRESH_INTERVAL)
  		&& data->limits_valid)
  		goto out;
  
  	for (i = 0; i < ADT7462_TEMP_COUNT; i++) {
  		data->temp_min[i] = i2c_smbus_read_byte_data(client,
  						ADT7462_TEMP_MIN_REG(i));
  		data->temp_max[i] = i2c_smbus_read_byte_data(client,
  						ADT7462_TEMP_MAX_REG(i));
  	}
  
  	for (i = 0; i < ADT7462_FAN_COUNT; i++)
  		data->fan_min[i] = i2c_smbus_read_byte_data(client,
  						ADT7462_REG_FAN_MIN(i));
  
  	for (i = 0; i < ADT7462_VOLT_COUNT; i++) {
  		int reg = ADT7462_REG_VOLT_MAX(data, i);
  		data->volt_max[i] =
  			(reg ? i2c_smbus_read_byte_data(client, reg) : 0);
  
  		reg = ADT7462_REG_VOLT_MIN(data, i);
  		data->volt_min[i] =
  			(reg ? i2c_smbus_read_byte_data(client, reg) : 0);
  	}
  
  	for (i = 0; i < ADT7462_PWM_COUNT; i++) {
  		data->pwm_min[i] = i2c_smbus_read_byte_data(client,
  						ADT7462_REG_PWM_MIN(i));
  		data->pwm_tmin[i] = i2c_smbus_read_byte_data(client,
  						ADT7462_REG_PWM_TMIN(i));
  		data->pwm_trange[i] = i2c_smbus_read_byte_data(client,
  						ADT7462_REG_PWM_TRANGE(i));
  		data->pwm_cfg[i] = i2c_smbus_read_byte_data(client,
  						ADT7462_REG_PWM_CFG(i));
  	}
  
  	data->pwm_max = i2c_smbus_read_byte_data(client, ADT7462_REG_PWM_MAX);
  
  	data->cfg2 = i2c_smbus_read_byte_data(client, ADT7462_REG_CFG2);
  
  	data->limits_last_updated = local_jiffies;
  	data->limits_valid = 1;
  
  out:
  	mutex_unlock(&data->lock);
  	return data;
  }

  static ssize_t temp_min_show(struct device *dev,
  			     struct device_attribute *devattr, char *buf)

  {
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	struct adt7462_data *data = adt7462_update_device(dev);
  
  	if (!temp_enabled(data, attr->index))
  		return sprintf(buf, "0
  ");
  
  	return sprintf(buf, "%d
  ", 1000 * (data->temp_min[attr->index] - 64));
  }

  static ssize_t temp_min_store(struct device *dev,
  			      struct device_attribute *devattr,
  			      const char *buf, size_t count)

  {
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);

  	struct adt7462_data *data = dev_get_drvdata(dev);
  	struct i2c_client *client = data->client;

  	long temp;

  	if (kstrtol(buf, 10, &temp) || !temp_enabled(data, attr->index))

  		return -EINVAL;

  	temp = clamp_val(temp, -64000, 191000);

  	temp = DIV_ROUND_CLOSEST(temp, 1000) + 64;

  
  	mutex_lock(&data->lock);
  	data->temp_min[attr->index] = temp;
  	i2c_smbus_write_byte_data(client, ADT7462_TEMP_MIN_REG(attr->index),
  				  temp);
  	mutex_unlock(&data->lock);
  
  	return count;
  }

  static ssize_t temp_max_show(struct device *dev,
  			     struct device_attribute *devattr, char *buf)

  {
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	struct adt7462_data *data = adt7462_update_device(dev);
  
  	if (!temp_enabled(data, attr->index))
  		return sprintf(buf, "0
  ");
  
  	return sprintf(buf, "%d
  ", 1000 * (data->temp_max[attr->index] - 64));
  }

  static ssize_t temp_max_store(struct device *dev,
  			      struct device_attribute *devattr,
  			      const char *buf, size_t count)

  {
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);

  	struct adt7462_data *data = dev_get_drvdata(dev);
  	struct i2c_client *client = data->client;

  	long temp;

  	if (kstrtol(buf, 10, &temp) || !temp_enabled(data, attr->index))

  		return -EINVAL;

  	temp = clamp_val(temp, -64000, 191000);

  	temp = DIV_ROUND_CLOSEST(temp, 1000) + 64;

  
  	mutex_lock(&data->lock);
  	data->temp_max[attr->index] = temp;
  	i2c_smbus_write_byte_data(client, ADT7462_TEMP_MAX_REG(attr->index),
  				  temp);
  	mutex_unlock(&data->lock);
  
  	return count;
  }

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

  			 char *buf)
  {
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	struct adt7462_data *data = adt7462_update_device(dev);
  	u8 frac = data->temp_frac[attr->index] >> TEMP_FRAC_OFFSET;
  
  	if (!temp_enabled(data, attr->index))
  		return sprintf(buf, "0
  ");
  
  	return sprintf(buf, "%d
  ", 1000 * (data->temp[attr->index] - 64) +
  				     250 * frac);
  }

  static ssize_t temp_label_show(struct device *dev,
  			       struct device_attribute *devattr, char *buf)

  {
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	struct adt7462_data *data = adt7462_update_device(dev);
  
  	return sprintf(buf, "%s
  ", temp_label(data, attr->index));
  }

  static ssize_t volt_max_show(struct device *dev,
  			     struct device_attribute *devattr, char *buf)

  {
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	struct adt7462_data *data = adt7462_update_device(dev);
  	int x = voltage_multiplier(data, attr->index);
  
  	x *= data->volt_max[attr->index];
  	x /= 1000; /* convert from uV to mV */
  
  	return sprintf(buf, "%d
  ", x);
  }

  static ssize_t volt_max_store(struct device *dev,
  			      struct device_attribute *devattr,
  			      const char *buf, size_t count)

  {
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);

  	struct adt7462_data *data = dev_get_drvdata(dev);
  	struct i2c_client *client = data->client;

  	int x = voltage_multiplier(data, attr->index);
  	long temp;

  	if (kstrtol(buf, 10, &temp) || !x)

  		return -EINVAL;

  	temp = clamp_val(temp, 0, 255 * x / 1000);

  	temp *= 1000; /* convert mV to uV */

  	temp = DIV_ROUND_CLOSEST(temp, x);

  
  	mutex_lock(&data->lock);
  	data->volt_max[attr->index] = temp;
  	i2c_smbus_write_byte_data(client,
  				  ADT7462_REG_VOLT_MAX(data, attr->index),
  				  temp);
  	mutex_unlock(&data->lock);
  
  	return count;
  }

  static ssize_t volt_min_show(struct device *dev,
  			     struct device_attribute *devattr, char *buf)

  {
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	struct adt7462_data *data = adt7462_update_device(dev);
  	int x = voltage_multiplier(data, attr->index);
  
  	x *= data->volt_min[attr->index];
  	x /= 1000; /* convert from uV to mV */
  
  	return sprintf(buf, "%d
  ", x);
  }

  static ssize_t volt_min_store(struct device *dev,
  			      struct device_attribute *devattr,
  			      const char *buf, size_t count)

  {
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);

  	struct adt7462_data *data = dev_get_drvdata(dev);
  	struct i2c_client *client = data->client;

  	int x = voltage_multiplier(data, attr->index);
  	long temp;

  	if (kstrtol(buf, 10, &temp) || !x)

  		return -EINVAL;

  	temp = clamp_val(temp, 0, 255 * x / 1000);

  	temp *= 1000; /* convert mV to uV */

  	temp = DIV_ROUND_CLOSEST(temp, x);

  
  	mutex_lock(&data->lock);
  	data->volt_min[attr->index] = temp;
  	i2c_smbus_write_byte_data(client,
  				  ADT7462_REG_VOLT_MIN(data, attr->index),
  				  temp);
  	mutex_unlock(&data->lock);
  
  	return count;
  }

  static ssize_t voltage_show(struct device *dev,
  			    struct device_attribute *devattr, char *buf)

  {
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	struct adt7462_data *data = adt7462_update_device(dev);
  	int x = voltage_multiplier(data, attr->index);
  
  	x *= data->voltages[attr->index];
  	x /= 1000; /* convert from uV to mV */
  
  	return sprintf(buf, "%d
  ", x);
  }

  static ssize_t voltage_label_show(struct device *dev,
  				  struct device_attribute *devattr, char *buf)

  {
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	struct adt7462_data *data = adt7462_update_device(dev);
  
  	return sprintf(buf, "%s
  ", voltage_label(data, attr->index));
  }

  static ssize_t alarm_show(struct device *dev,
  			  struct device_attribute *devattr, char *buf)

  {
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	struct adt7462_data *data = adt7462_update_device(dev);
  	int reg = attr->index >> ADT7462_ALARM_REG_SHIFT;
  	int mask = attr->index & ADT7462_ALARM_FLAG_MASK;
  
  	if (data->alarms[reg] & mask)
  		return sprintf(buf, "1
  ");
  	else
  		return sprintf(buf, "0
  ");
  }
  
  static int fan_enabled(struct adt7462_data *data, int fan)
  {
  	return data->fan_enabled & (1 << fan);
  }

  static ssize_t fan_min_show(struct device *dev,
  			    struct device_attribute *devattr, char *buf)

  {
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	struct adt7462_data *data = adt7462_update_device(dev);
  	u16 temp;
  
  	/* Only the MSB of the min fan period is stored... */
  	temp = data->fan_min[attr->index];
  	temp <<= 8;
  
  	if (!fan_enabled(data, attr->index) ||
  	    !FAN_DATA_VALID(temp))
  		return sprintf(buf, "0
  ");
  
  	return sprintf(buf, "%d
  ", FAN_PERIOD_TO_RPM(temp));
  }

  static ssize_t fan_min_store(struct device *dev,
  			     struct device_attribute *devattr,
  			     const char *buf, size_t count)

  {
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);

  	struct adt7462_data *data = dev_get_drvdata(dev);
  	struct i2c_client *client = data->client;

  	long temp;

  	if (kstrtol(buf, 10, &temp) || !temp ||

  	    !fan_enabled(data, attr->index))
  		return -EINVAL;
  
  	temp = FAN_RPM_TO_PERIOD(temp);
  	temp >>= 8;

  	temp = clamp_val(temp, 1, 255);

  
  	mutex_lock(&data->lock);
  	data->fan_min[attr->index] = temp;
  	i2c_smbus_write_byte_data(client, ADT7462_REG_FAN_MIN(attr->index),
  				  temp);
  	mutex_unlock(&data->lock);
  
  	return count;
  }

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

  			char *buf)
  {
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	struct adt7462_data *data = adt7462_update_device(dev);
  
  	if (!fan_enabled(data, attr->index) ||
  	    !FAN_DATA_VALID(data->fan[attr->index]))
  		return sprintf(buf, "0
  ");
  
  	return sprintf(buf, "%d
  ",
  		       FAN_PERIOD_TO_RPM(data->fan[attr->index]));
  }

  static ssize_t force_pwm_max_show(struct device *dev,
  				  struct device_attribute *devattr, char *buf)

  {
  	struct adt7462_data *data = adt7462_update_device(dev);
  	return sprintf(buf, "%d
  ", (data->cfg2 & ADT7462_FSPD_MASK ? 1 : 0));
  }

  static ssize_t force_pwm_max_store(struct device *dev,
  				   struct device_attribute *devattr,
  				   const char *buf, size_t count)

  {

  	struct adt7462_data *data = dev_get_drvdata(dev);
  	struct i2c_client *client = data->client;

  	long temp;
  	u8 reg;

  	if (kstrtol(buf, 10, &temp))

  		return -EINVAL;
  
  	mutex_lock(&data->lock);
  	reg = i2c_smbus_read_byte_data(client, ADT7462_REG_CFG2);
  	if (temp)
  		reg |= ADT7462_FSPD_MASK;
  	else
  		reg &= ~ADT7462_FSPD_MASK;
  	data->cfg2 = reg;
  	i2c_smbus_write_byte_data(client, ADT7462_REG_CFG2, reg);
  	mutex_unlock(&data->lock);
  
  	return count;
  }

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

  			char *buf)
  {
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	struct adt7462_data *data = adt7462_update_device(dev);
  	return sprintf(buf, "%d
  ", data->pwm[attr->index]);
  }

  static ssize_t pwm_store(struct device *dev, struct device_attribute *devattr,
  			 const char *buf, size_t count)

  {
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);

  	struct adt7462_data *data = dev_get_drvdata(dev);
  	struct i2c_client *client = data->client;

  	long temp;

  	if (kstrtol(buf, 10, &temp))

  		return -EINVAL;

  	temp = clamp_val(temp, 0, 255);

  
  	mutex_lock(&data->lock);
  	data->pwm[attr->index] = temp;
  	i2c_smbus_write_byte_data(client, ADT7462_REG_PWM(attr->index), temp);
  	mutex_unlock(&data->lock);
  
  	return count;
  }

  static ssize_t pwm_max_show(struct device *dev,
  			    struct device_attribute *devattr, char *buf)

  {
  	struct adt7462_data *data = adt7462_update_device(dev);
  	return sprintf(buf, "%d
  ", data->pwm_max);
  }

  static ssize_t pwm_max_store(struct device *dev,
  			     struct device_attribute *devattr,
  			     const char *buf, size_t count)

  {

  	struct adt7462_data *data = dev_get_drvdata(dev);
  	struct i2c_client *client = data->client;

  	long temp;

  	if (kstrtol(buf, 10, &temp))

  		return -EINVAL;

  	temp = clamp_val(temp, 0, 255);

  
  	mutex_lock(&data->lock);
  	data->pwm_max = temp;
  	i2c_smbus_write_byte_data(client, ADT7462_REG_PWM_MAX, temp);
  	mutex_unlock(&data->lock);
  
  	return count;
  }

  static ssize_t pwm_min_show(struct device *dev,
  			    struct device_attribute *devattr, char *buf)

  {
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	struct adt7462_data *data = adt7462_update_device(dev);
  	return sprintf(buf, "%d
  ", data->pwm_min[attr->index]);
  }

  static ssize_t pwm_min_store(struct device *dev,
  			     struct device_attribute *devattr,
  			     const char *buf, size_t count)

  {
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);

  	struct adt7462_data *data = dev_get_drvdata(dev);
  	struct i2c_client *client = data->client;

  	long temp;

  	if (kstrtol(buf, 10, &temp))

  		return -EINVAL;

  	temp = clamp_val(temp, 0, 255);

  
  	mutex_lock(&data->lock);
  	data->pwm_min[attr->index] = temp;
  	i2c_smbus_write_byte_data(client, ADT7462_REG_PWM_MIN(attr->index),
  				  temp);
  	mutex_unlock(&data->lock);
  
  	return count;
  }

  static ssize_t pwm_hyst_show(struct device *dev,
  			     struct device_attribute *devattr, char *buf)

  {
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	struct adt7462_data *data = adt7462_update_device(dev);
  	return sprintf(buf, "%d
  ", 1000 *
  		      (data->pwm_trange[attr->index] & ADT7462_PWM_HYST_MASK));
  }

  static ssize_t pwm_hyst_store(struct device *dev,
  			      struct device_attribute *devattr,
  			      const char *buf, size_t count)

  {
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);

  	struct adt7462_data *data = dev_get_drvdata(dev);
  	struct i2c_client *client = data->client;

  	long temp;

  	if (kstrtol(buf, 10, &temp))

  		return -EINVAL;

  	temp = clamp_val(temp, 0, 15000);

  	temp = DIV_ROUND_CLOSEST(temp, 1000);

  
  	/* package things up */
  	temp &= ADT7462_PWM_HYST_MASK;
  	temp |= data->pwm_trange[attr->index] & ADT7462_PWM_RANGE_MASK;
  
  	mutex_lock(&data->lock);
  	data->pwm_trange[attr->index] = temp;
  	i2c_smbus_write_byte_data(client, ADT7462_REG_PWM_TRANGE(attr->index),
  				  temp);
  	mutex_unlock(&data->lock);
  
  	return count;
  }

  static ssize_t pwm_tmax_show(struct device *dev,
  			     struct device_attribute *devattr, char *buf)

  {
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	struct adt7462_data *data = adt7462_update_device(dev);
  
  	/* tmax = tmin + trange */
  	int trange = trange_values[data->pwm_trange[attr->index] >>
  				   ADT7462_PWM_RANGE_SHIFT];
  	int tmin = (data->pwm_tmin[attr->index] - 64) * 1000;
  
  	return sprintf(buf, "%d
  ", tmin + trange);
  }

  static ssize_t pwm_tmax_store(struct device *dev,
  			      struct device_attribute *devattr,
  			      const char *buf, size_t count)

  {
  	int temp;
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);

  	struct adt7462_data *data = dev_get_drvdata(dev);
  	struct i2c_client *client = data->client;

  	int tmin, trange_value;
  	long trange;

  	if (kstrtol(buf, 10, &trange))

  		return -EINVAL;
  
  	/* trange = tmax - tmin */
  	tmin = (data->pwm_tmin[attr->index] - 64) * 1000;
  	trange_value = find_trange_value(trange - tmin);

  	if (trange_value < 0)

  		return trange_value;

  
  	temp = trange_value << ADT7462_PWM_RANGE_SHIFT;
  	temp |= data->pwm_trange[attr->index] & ADT7462_PWM_HYST_MASK;
  
  	mutex_lock(&data->lock);
  	data->pwm_trange[attr->index] = temp;
  	i2c_smbus_write_byte_data(client, ADT7462_REG_PWM_TRANGE(attr->index),
  				  temp);
  	mutex_unlock(&data->lock);
  
  	return count;
  }

  static ssize_t pwm_tmin_show(struct device *dev,
  			     struct device_attribute *devattr, char *buf)

  {
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	struct adt7462_data *data = adt7462_update_device(dev);
  	return sprintf(buf, "%d
  ", 1000 * (data->pwm_tmin[attr->index] - 64));
  }

  static ssize_t pwm_tmin_store(struct device *dev,
  			      struct device_attribute *devattr,
  			      const char *buf, size_t count)

  {
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);

  	struct adt7462_data *data = dev_get_drvdata(dev);
  	struct i2c_client *client = data->client;

  	long temp;

  	if (kstrtol(buf, 10, &temp))

  		return -EINVAL;

  	temp = clamp_val(temp, -64000, 191000);

  	temp = DIV_ROUND_CLOSEST(temp, 1000) + 64;

  
  	mutex_lock(&data->lock);
  	data->pwm_tmin[attr->index] = temp;
  	i2c_smbus_write_byte_data(client, ADT7462_REG_PWM_TMIN(attr->index),
  				  temp);
  	mutex_unlock(&data->lock);
  
  	return count;
  }

  static ssize_t pwm_auto_show(struct device *dev,
  			     struct device_attribute *devattr, char *buf)

  {
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	struct adt7462_data *data = adt7462_update_device(dev);
  	int cfg = data->pwm_cfg[attr->index] >> ADT7462_PWM_CHANNEL_SHIFT;
  
  	switch (cfg) {
  	case 4: /* off */
  		return sprintf(buf, "0
  ");
  	case 7: /* manual */
  		return sprintf(buf, "1
  ");
  	default: /* automatic */
  		return sprintf(buf, "2
  ");
  	}
  }
  
  static void set_pwm_channel(struct i2c_client *client,
  			    struct adt7462_data *data,
  			    int which,
  			    int value)
  {
  	int temp = data->pwm_cfg[which] & ~ADT7462_PWM_CHANNEL_MASK;
  	temp |= value << ADT7462_PWM_CHANNEL_SHIFT;
  
  	mutex_lock(&data->lock);
  	data->pwm_cfg[which] = temp;
  	i2c_smbus_write_byte_data(client, ADT7462_REG_PWM_CFG(which), temp);
  	mutex_unlock(&data->lock);
  }

  static ssize_t pwm_auto_store(struct device *dev,
  			      struct device_attribute *devattr,
  			      const char *buf, size_t count)

  {
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);

  	struct adt7462_data *data = dev_get_drvdata(dev);
  	struct i2c_client *client = data->client;

  	long temp;

  	if (kstrtol(buf, 10, &temp))

  		return -EINVAL;
  
  	switch (temp) {
  	case 0: /* off */
  		set_pwm_channel(client, data, attr->index, 4);
  		return count;
  	case 1: /* manual */
  		set_pwm_channel(client, data, attr->index, 7);
  		return count;
  	default:
  		return -EINVAL;
  	}
  }

  static ssize_t pwm_auto_temp_show(struct device *dev,
  				  struct device_attribute *devattr, char *buf)

  {
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
  	struct adt7462_data *data = adt7462_update_device(dev);
  	int channel = data->pwm_cfg[attr->index] >> ADT7462_PWM_CHANNEL_SHIFT;
  
  	switch (channel) {
  	case 0: /* temp[1234] only */
  	case 1:
  	case 2:
  	case 3:
  		return sprintf(buf, "%d
  ", (1 << channel));
  	case 5: /* temp1 & temp4  */
  		return sprintf(buf, "9
  ");
  	case 6:
  		return sprintf(buf, "15
  ");
  	default:
  		return sprintf(buf, "0
  ");
  	}
  }
  
  static int cvt_auto_temp(int input)
  {
  	if (input == 0xF)
  		return 6;
  	if (input == 0x9)
  		return 5;
  	if (input < 1 || !is_power_of_2(input))
  		return -EINVAL;
  	return ilog2(input);
  }

  static ssize_t pwm_auto_temp_store(struct device *dev,
  				   struct device_attribute *devattr,
  				   const char *buf, size_t count)

  {
  	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);

  	struct adt7462_data *data = dev_get_drvdata(dev);
  	struct i2c_client *client = data->client;

  	long temp;

  	if (kstrtol(buf, 10, &temp))

  		return -EINVAL;
  
  	temp = cvt_auto_temp(temp);
  	if (temp < 0)
  		return temp;
  
  	set_pwm_channel(client, data, attr->index, temp);
  
  	return count;
  }

  static SENSOR_DEVICE_ATTR_RW(temp1_max, temp_max, 0);
  static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1);
  static SENSOR_DEVICE_ATTR_RW(temp3_max, temp_max, 2);
  static SENSOR_DEVICE_ATTR_RW(temp4_max, temp_max, 3);
  
  static SENSOR_DEVICE_ATTR_RW(temp1_min, temp_min, 0);
  static SENSOR_DEVICE_ATTR_RW(temp2_min, temp_min, 1);
  static SENSOR_DEVICE_ATTR_RW(temp3_min, temp_min, 2);
  static SENSOR_DEVICE_ATTR_RW(temp4_min, temp_min, 3);
  
  static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0);
  static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1);
  static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2);
  static SENSOR_DEVICE_ATTR_RO(temp4_input, temp, 3);
  
  static SENSOR_DEVICE_ATTR_RO(temp1_label, temp_label, 0);
  static SENSOR_DEVICE_ATTR_RO(temp2_label, temp_label, 1);
  static SENSOR_DEVICE_ATTR_RO(temp3_label, temp_label, 2);
  static SENSOR_DEVICE_ATTR_RO(temp4_label, temp_label, 3);
  
  static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm,
  			     ADT7462_ALARM1 | ADT7462_LT_ALARM);
  static SENSOR_DEVICE_ATTR_RO(temp2_alarm, alarm,
  			     ADT7462_ALARM1 | ADT7462_R1T_ALARM);
  static SENSOR_DEVICE_ATTR_RO(temp3_alarm, alarm,
  			     ADT7462_ALARM1 | ADT7462_R2T_ALARM);
  static SENSOR_DEVICE_ATTR_RO(temp4_alarm, alarm,
  			     ADT7462_ALARM1 | ADT7462_R3T_ALARM);
  
  static SENSOR_DEVICE_ATTR_RW(in1_max, volt_max, 0);
  static SENSOR_DEVICE_ATTR_RW(in2_max, volt_max, 1);
  static SENSOR_DEVICE_ATTR_RW(in3_max, volt_max, 2);
  static SENSOR_DEVICE_ATTR_RW(in4_max, volt_max, 3);
  static SENSOR_DEVICE_ATTR_RW(in5_max, volt_max, 4);
  static SENSOR_DEVICE_ATTR_RW(in6_max, volt_max, 5);
  static SENSOR_DEVICE_ATTR_RW(in7_max, volt_max, 6);
  static SENSOR_DEVICE_ATTR_RW(in8_max, volt_max, 7);
  static SENSOR_DEVICE_ATTR_RW(in9_max, volt_max, 8);
  static SENSOR_DEVICE_ATTR_RW(in10_max, volt_max, 9);
  static SENSOR_DEVICE_ATTR_RW(in11_max, volt_max, 10);
  static SENSOR_DEVICE_ATTR_RW(in12_max, volt_max, 11);
  static SENSOR_DEVICE_ATTR_RW(in13_max, volt_max, 12);
  
  static SENSOR_DEVICE_ATTR_RW(in1_min, volt_min, 0);
  static SENSOR_DEVICE_ATTR_RW(in2_min, volt_min, 1);
  static SENSOR_DEVICE_ATTR_RW(in3_min, volt_min, 2);
  static SENSOR_DEVICE_ATTR_RW(in4_min, volt_min, 3);
  static SENSOR_DEVICE_ATTR_RW(in5_min, volt_min, 4);
  static SENSOR_DEVICE_ATTR_RW(in6_min, volt_min, 5);
  static SENSOR_DEVICE_ATTR_RW(in7_min, volt_min, 6);
  static SENSOR_DEVICE_ATTR_RW(in8_min, volt_min, 7);
  static SENSOR_DEVICE_ATTR_RW(in9_min, volt_min, 8);
  static SENSOR_DEVICE_ATTR_RW(in10_min, volt_min, 9);
  static SENSOR_DEVICE_ATTR_RW(in11_min, volt_min, 10);
  static SENSOR_DEVICE_ATTR_RW(in12_min, volt_min, 11);
  static SENSOR_DEVICE_ATTR_RW(in13_min, volt_min, 12);
  
  static SENSOR_DEVICE_ATTR_RO(in1_input, voltage, 0);
  static SENSOR_DEVICE_ATTR_RO(in2_input, voltage, 1);
  static SENSOR_DEVICE_ATTR_RO(in3_input, voltage, 2);
  static SENSOR_DEVICE_ATTR_RO(in4_input, voltage, 3);
  static SENSOR_DEVICE_ATTR_RO(in5_input, voltage, 4);
  static SENSOR_DEVICE_ATTR_RO(in6_input, voltage, 5);
  static SENSOR_DEVICE_ATTR_RO(in7_input, voltage, 6);
  static SENSOR_DEVICE_ATTR_RO(in8_input, voltage, 7);
  static SENSOR_DEVICE_ATTR_RO(in9_input, voltage, 8);
  static SENSOR_DEVICE_ATTR_RO(in10_input, voltage, 9);
  static SENSOR_DEVICE_ATTR_RO(in11_input, voltage, 10);
  static SENSOR_DEVICE_ATTR_RO(in12_input, voltage, 11);
  static SENSOR_DEVICE_ATTR_RO(in13_input, voltage, 12);
  
  static SENSOR_DEVICE_ATTR_RO(in1_label, voltage_label, 0);
  static SENSOR_DEVICE_ATTR_RO(in2_label, voltage_label, 1);
  static SENSOR_DEVICE_ATTR_RO(in3_label, voltage_label, 2);
  static SENSOR_DEVICE_ATTR_RO(in4_label, voltage_label, 3);
  static SENSOR_DEVICE_ATTR_RO(in5_label, voltage_label, 4);
  static SENSOR_DEVICE_ATTR_RO(in6_label, voltage_label, 5);
  static SENSOR_DEVICE_ATTR_RO(in7_label, voltage_label, 6);
  static SENSOR_DEVICE_ATTR_RO(in8_label, voltage_label, 7);
  static SENSOR_DEVICE_ATTR_RO(in9_label, voltage_label, 8);
  static SENSOR_DEVICE_ATTR_RO(in10_label, voltage_label, 9);
  static SENSOR_DEVICE_ATTR_RO(in11_label, voltage_label, 10);
  static SENSOR_DEVICE_ATTR_RO(in12_label, voltage_label, 11);
  static SENSOR_DEVICE_ATTR_RO(in13_label, voltage_label, 12);
  
  static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm,
  			     ADT7462_ALARM2 | ADT7462_V0_ALARM);
  static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm,
  			     ADT7462_ALARM2 | ADT7462_V7_ALARM);
  static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm,
  			     ADT7462_ALARM2 | ADT7462_V2_ALARM);
  static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm,
  			     ADT7462_ALARM2 | ADT7462_V6_ALARM);
  static SENSOR_DEVICE_ATTR_RO(in5_alarm, alarm,
  			     ADT7462_ALARM2 | ADT7462_V5_ALARM);
  static SENSOR_DEVICE_ATTR_RO(in6_alarm, alarm,
  			     ADT7462_ALARM2 | ADT7462_V4_ALARM);
  static SENSOR_DEVICE_ATTR_RO(in7_alarm, alarm,
  			     ADT7462_ALARM2 | ADT7462_V3_ALARM);
  static SENSOR_DEVICE_ATTR_RO(in8_alarm, alarm,
  			     ADT7462_ALARM2 | ADT7462_V1_ALARM);
  static SENSOR_DEVICE_ATTR_RO(in9_alarm, alarm,
  			     ADT7462_ALARM3 | ADT7462_V10_ALARM);
  static SENSOR_DEVICE_ATTR_RO(in10_alarm, alarm,
  			     ADT7462_ALARM3 | ADT7462_V9_ALARM);
  static SENSOR_DEVICE_ATTR_RO(in11_alarm, alarm,
  			     ADT7462_ALARM3 | ADT7462_V8_ALARM);
  static SENSOR_DEVICE_ATTR_RO(in12_alarm, alarm,
  			     ADT7462_ALARM3 | ADT7462_V11_ALARM);
  static SENSOR_DEVICE_ATTR_RO(in13_alarm, alarm,
  			     ADT7462_ALARM3 | ADT7462_V12_ALARM);
  
  static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0);
  static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1);
  static SENSOR_DEVICE_ATTR_RW(fan3_min, fan_min, 2);
  static SENSOR_DEVICE_ATTR_RW(fan4_min, fan_min, 3);
  static SENSOR_DEVICE_ATTR_RW(fan5_min, fan_min, 4);
  static SENSOR_DEVICE_ATTR_RW(fan6_min, fan_min, 5);
  static SENSOR_DEVICE_ATTR_RW(fan7_min, fan_min, 6);
  static SENSOR_DEVICE_ATTR_RW(fan8_min, fan_min, 7);
  
  static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0);
  static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1);
  static SENSOR_DEVICE_ATTR_RO(fan3_input, fan, 2);
  static SENSOR_DEVICE_ATTR_RO(fan4_input, fan, 3);
  static SENSOR_DEVICE_ATTR_RO(fan5_input, fan, 4);
  static SENSOR_DEVICE_ATTR_RO(fan6_input, fan, 5);
  static SENSOR_DEVICE_ATTR_RO(fan7_input, fan, 6);
  static SENSOR_DEVICE_ATTR_RO(fan8_input, fan, 7);
  
  static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm,
  			     ADT7462_ALARM4 | ADT7462_F0_ALARM);
  static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm,
  			     ADT7462_ALARM4 | ADT7462_F1_ALARM);
  static SENSOR_DEVICE_ATTR_RO(fan3_alarm, alarm,
  			     ADT7462_ALARM4 | ADT7462_F2_ALARM);
  static SENSOR_DEVICE_ATTR_RO(fan4_alarm, alarm,
  			     ADT7462_ALARM4 | ADT7462_F3_ALARM);
  static SENSOR_DEVICE_ATTR_RO(fan5_alarm, alarm,
  			     ADT7462_ALARM4 | ADT7462_F4_ALARM);
  static SENSOR_DEVICE_ATTR_RO(fan6_alarm, alarm,
  			     ADT7462_ALARM4 | ADT7462_F5_ALARM);
  static SENSOR_DEVICE_ATTR_RO(fan7_alarm, alarm,
  			     ADT7462_ALARM4 | ADT7462_F6_ALARM);
  static SENSOR_DEVICE_ATTR_RO(fan8_alarm, alarm,
  			     ADT7462_ALARM4 | ADT7462_F7_ALARM);
  
  static SENSOR_DEVICE_ATTR_RW(force_pwm_max, force_pwm_max, 0);
  
  static SENSOR_DEVICE_ATTR_RW(pwm1, pwm, 0);
  static SENSOR_DEVICE_ATTR_RW(pwm2, pwm, 1);
  static SENSOR_DEVICE_ATTR_RW(pwm3, pwm, 2);
  static SENSOR_DEVICE_ATTR_RW(pwm4, pwm, 3);
  
  static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point1_pwm, pwm_min, 0);
  static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point1_pwm, pwm_min, 1);
  static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point1_pwm, pwm_min, 2);
  static SENSOR_DEVICE_ATTR_RW(pwm4_auto_point1_pwm, pwm_min, 3);
  
  static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point2_pwm, pwm_max, 0);
  static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point2_pwm, pwm_max, 1);
  static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point2_pwm, pwm_max, 2);
  static SENSOR_DEVICE_ATTR_RW(pwm4_auto_point2_pwm, pwm_max, 3);
  
  static SENSOR_DEVICE_ATTR_RW(temp1_auto_point1_hyst, pwm_hyst, 0);
  static SENSOR_DEVICE_ATTR_RW(temp2_auto_point1_hyst, pwm_hyst, 1);
  static SENSOR_DEVICE_ATTR_RW(temp3_auto_point1_hyst, pwm_hyst, 2);
  static SENSOR_DEVICE_ATTR_RW(temp4_auto_point1_hyst, pwm_hyst, 3);
  
  static SENSOR_DEVICE_ATTR_RW(temp1_auto_point2_hyst, pwm_hyst, 0);
  static SENSOR_DEVICE_ATTR_RW(temp2_auto_point2_hyst, pwm_hyst, 1);
  static SENSOR_DEVICE_ATTR_RW(temp3_auto_point2_hyst, pwm_hyst, 2);
  static SENSOR_DEVICE_ATTR_RW(temp4_auto_point2_hyst, pwm_hyst, 3);
  
  static SENSOR_DEVICE_ATTR_RW(temp1_auto_point1_temp, pwm_tmin, 0);
  static SENSOR_DEVICE_ATTR_RW(temp2_auto_point1_temp, pwm_tmin, 1);
  static SENSOR_DEVICE_ATTR_RW(temp3_auto_point1_temp, pwm_tmin, 2);
  static SENSOR_DEVICE_ATTR_RW(temp4_auto_point1_temp, pwm_tmin, 3);
  
  static SENSOR_DEVICE_ATTR_RW(temp1_auto_point2_temp, pwm_tmax, 0);
  static SENSOR_DEVICE_ATTR_RW(temp2_auto_point2_temp, pwm_tmax, 1);
  static SENSOR_DEVICE_ATTR_RW(temp3_auto_point2_temp, pwm_tmax, 2);
  static SENSOR_DEVICE_ATTR_RW(temp4_auto_point2_temp, pwm_tmax, 3);
  
  static SENSOR_DEVICE_ATTR_RW(pwm1_enable, pwm_auto, 0);
  static SENSOR_DEVICE_ATTR_RW(pwm2_enable, pwm_auto, 1);
  static SENSOR_DEVICE_ATTR_RW(pwm3_enable, pwm_auto, 2);
  static SENSOR_DEVICE_ATTR_RW(pwm4_enable, pwm_auto, 3);
  
  static SENSOR_DEVICE_ATTR_RW(pwm1_auto_channels_temp, pwm_auto_temp, 0);
  static SENSOR_DEVICE_ATTR_RW(pwm2_auto_channels_temp, pwm_auto_temp, 1);
  static SENSOR_DEVICE_ATTR_RW(pwm3_auto_channels_temp, pwm_auto_temp, 2);
  static SENSOR_DEVICE_ATTR_RW(pwm4_auto_channels_temp, pwm_auto_temp, 3);

  static struct attribute *adt7462_attrs[] = {

  	&sensor_dev_attr_temp1_max.dev_attr.attr,
  	&sensor_dev_attr_temp2_max.dev_attr.attr,
  	&sensor_dev_attr_temp3_max.dev_attr.attr,
  	&sensor_dev_attr_temp4_max.dev_attr.attr,
  
  	&sensor_dev_attr_temp1_min.dev_attr.attr,
  	&sensor_dev_attr_temp2_min.dev_attr.attr,
  	&sensor_dev_attr_temp3_min.dev_attr.attr,
  	&sensor_dev_attr_temp4_min.dev_attr.attr,
  
  	&sensor_dev_attr_temp1_input.dev_attr.attr,
  	&sensor_dev_attr_temp2_input.dev_attr.attr,
  	&sensor_dev_attr_temp3_input.dev_attr.attr,
  	&sensor_dev_attr_temp4_input.dev_attr.attr,
  
  	&sensor_dev_attr_temp1_label.dev_attr.attr,
  	&sensor_dev_attr_temp2_label.dev_attr.attr,
  	&sensor_dev_attr_temp3_label.dev_attr.attr,
  	&sensor_dev_attr_temp4_label.dev_attr.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,
  	&sensor_dev_attr_temp4_alarm.dev_attr.attr,
  
  	&sensor_dev_attr_in1_max.dev_attr.attr,
  	&sensor_dev_attr_in2_max.dev_attr.attr,
  	&sensor_dev_attr_in3_max.dev_attr.attr,
  	&sensor_dev_attr_in4_max.dev_attr.attr,
  	&sensor_dev_attr_in5_max.dev_attr.attr,
  	&sensor_dev_attr_in6_max.dev_attr.attr,
  	&sensor_dev_attr_in7_max.dev_attr.attr,
  	&sensor_dev_attr_in8_max.dev_attr.attr,
  	&sensor_dev_attr_in9_max.dev_attr.attr,
  	&sensor_dev_attr_in10_max.dev_attr.attr,
  	&sensor_dev_attr_in11_max.dev_attr.attr,
  	&sensor_dev_attr_in12_max.dev_attr.attr,
  	&sensor_dev_attr_in13_max.dev_attr.attr,
  
  	&sensor_dev_attr_in1_min.dev_attr.attr,
  	&sensor_dev_attr_in2_min.dev_attr.attr,
  	&sensor_dev_attr_in3_min.dev_attr.attr,
  	&sensor_dev_attr_in4_min.dev_attr.attr,
  	&sensor_dev_attr_in5_min.dev_attr.attr,
  	&sensor_dev_attr_in6_min.dev_attr.attr,
  	&sensor_dev_attr_in7_min.dev_attr.attr,
  	&sensor_dev_attr_in8_min.dev_attr.attr,
  	&sensor_dev_attr_in9_min.dev_attr.attr,
  	&sensor_dev_attr_in10_min.dev_attr.attr,
  	&sensor_dev_attr_in11_min.dev_attr.attr,
  	&sensor_dev_attr_in12_min.dev_attr.attr,
  	&sensor_dev_attr_in13_min.dev_attr.attr,
  
  	&sensor_dev_attr_in1_input.dev_attr.attr,
  	&sensor_dev_attr_in2_input.dev_attr.attr,
  	&sensor_dev_attr_in3_input.dev_attr.attr,
  	&sensor_dev_attr_in4_input.dev_attr.attr,
  	&sensor_dev_attr_in5_input.dev_attr.attr,
  	&sensor_dev_attr_in6_input.dev_attr.attr,
  	&sensor_dev_attr_in7_input.dev_attr.attr,
  	&sensor_dev_attr_in8_input.dev_attr.attr,
  	&sensor_dev_attr_in9_input.dev_attr.attr,
  	&sensor_dev_attr_in10_input.dev_attr.attr,
  	&sensor_dev_attr_in11_input.dev_attr.attr,
  	&sensor_dev_attr_in12_input.dev_attr.attr,
  	&sensor_dev_attr_in13_input.dev_attr.attr,
  
  	&sensor_dev_attr_in1_label.dev_attr.attr,
  	&sensor_dev_attr_in2_label.dev_attr.attr,
  	&sensor_dev_attr_in3_label.dev_attr.attr,
  	&sensor_dev_attr_in4_label.dev_attr.attr,
  	&sensor_dev_attr_in5_label.dev_attr.attr,
  	&sensor_dev_attr_in6_label.dev_attr.attr,
  	&sensor_dev_attr_in7_label.dev_attr.attr,
  	&sensor_dev_attr_in8_label.dev_attr.attr,
  	&sensor_dev_attr_in9_label.dev_attr.attr,
  	&sensor_dev_attr_in10_label.dev_attr.attr,
  	&sensor_dev_attr_in11_label.dev_attr.attr,
  	&sensor_dev_attr_in12_label.dev_attr.attr,
  	&sensor_dev_attr_in13_label.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_in4_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,
  	&sensor_dev_attr_in8_alarm.dev_attr.attr,
  	&sensor_dev_attr_in9_alarm.dev_attr.attr,
  	&sensor_dev_attr_in10_alarm.dev_attr.attr,
  	&sensor_dev_attr_in11_alarm.dev_attr.attr,
  	&sensor_dev_attr_in12_alarm.dev_attr.attr,
  	&sensor_dev_attr_in13_alarm.dev_attr.attr,
  
  	&sensor_dev_attr_fan1_min.dev_attr.attr,
  	&sensor_dev_attr_fan2_min.dev_attr.attr,
  	&sensor_dev_attr_fan3_min.dev_attr.attr,
  	&sensor_dev_attr_fan4_min.dev_attr.attr,
  	&sensor_dev_attr_fan5_min.dev_attr.attr,
  	&sensor_dev_attr_fan6_min.dev_attr.attr,
  	&sensor_dev_attr_fan7_min.dev_attr.attr,
  	&sensor_dev_attr_fan8_min.dev_attr.attr,
  
  	&sensor_dev_attr_fan1_input.dev_attr.attr,
  	&sensor_dev_attr_fan2_input.dev_attr.attr,
  	&sensor_dev_attr_fan3_input.dev_attr.attr,
  	&sensor_dev_attr_fan4_input.dev_attr.attr,
  	&sensor_dev_attr_fan5_input.dev_attr.attr,
  	&sensor_dev_attr_fan6_input.dev_attr.attr,
  	&sensor_dev_attr_fan7_input.dev_attr.attr,
  	&sensor_dev_attr_fan8_input.dev_attr.attr,
  
  	&sensor_dev_attr_fan1_alarm.dev_attr.attr,
  	&sensor_dev_attr_fan2_alarm.dev_attr.attr,
  	&sensor_dev_attr_fan3_alarm.dev_attr.attr,
  	&sensor_dev_attr_fan4_alarm.dev_attr.attr,
  	&sensor_dev_attr_fan5_alarm.dev_attr.attr,
  	&sensor_dev_attr_fan6_alarm.dev_attr.attr,
  	&sensor_dev_attr_fan7_alarm.dev_attr.attr,
  	&sensor_dev_attr_fan8_alarm.dev_attr.attr,
  
  	&sensor_dev_attr_force_pwm_max.dev_attr.attr,
  	&sensor_dev_attr_pwm1.dev_attr.attr,
  	&sensor_dev_attr_pwm2.dev_attr.attr,
  	&sensor_dev_attr_pwm3.dev_attr.attr,
  	&sensor_dev_attr_pwm4.dev_attr.attr,
  
  	&sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
  	&sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
  	&sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
  	&sensor_dev_attr_pwm4_auto_point1_pwm.dev_attr.attr,
  
  	&sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
  	&sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
  	&sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
  	&sensor_dev_attr_pwm4_auto_point2_pwm.dev_attr.attr,
  
  	&sensor_dev_attr_temp1_auto_point1_hyst.dev_attr.attr,
  	&sensor_dev_attr_temp2_auto_point1_hyst.dev_attr.attr,
  	&sensor_dev_attr_temp3_auto_point1_hyst.dev_attr.attr,
  	&sensor_dev_attr_temp4_auto_point1_hyst.dev_attr.attr,
  
  	&sensor_dev_attr_temp1_auto_point2_hyst.dev_attr.attr,
  	&sensor_dev_attr_temp2_auto_point2_hyst.dev_attr.attr,
  	&sensor_dev_attr_temp3_auto_point2_hyst.dev_attr.attr,
  	&sensor_dev_attr_temp4_auto_point2_hyst.dev_attr.attr,
  
  	&sensor_dev_attr_temp1_auto_point1_temp.dev_attr.attr,
  	&sensor_dev_attr_temp2_auto_point1_temp.dev_attr.attr,
  	&sensor_dev_attr_temp3_auto_point1_temp.dev_attr.attr,
  	&sensor_dev_attr_temp4_auto_point1_temp.dev_attr.attr,
  
  	&sensor_dev_attr_temp1_auto_point2_temp.dev_attr.attr,
  	&sensor_dev_attr_temp2_auto_point2_temp.dev_attr.attr,
  	&sensor_dev_attr_temp3_auto_point2_temp.dev_attr.attr,
  	&sensor_dev_attr_temp4_auto_point2_temp.dev_attr.attr,
  
  	&sensor_dev_attr_pwm1_enable.dev_attr.attr,
  	&sensor_dev_attr_pwm2_enable.dev_attr.attr,
  	&sensor_dev_attr_pwm3_enable.dev_attr.attr,
  	&sensor_dev_attr_pwm4_enable.dev_attr.attr,
  
  	&sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
  	&sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
  	&sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
  	&sensor_dev_attr_pwm4_auto_channels_temp.dev_attr.attr,
  	NULL
  };

  ATTRIBUTE_GROUPS(adt7462);

  /* Return 0 if detection is successful, -ENODEV otherwise */

  static int adt7462_detect(struct i2c_client *client,

  			  struct i2c_board_info *info)
  {
  	struct i2c_adapter *adapter = client->adapter;

  	int vendor, device, revision;

  
  	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
  		return -ENODEV;

  	vendor = i2c_smbus_read_byte_data(client, ADT7462_REG_VENDOR);
  	if (vendor != ADT7462_VENDOR)
  		return -ENODEV;

  	device = i2c_smbus_read_byte_data(client, ADT7462_REG_DEVICE);
  	if (device != ADT7462_DEVICE)
  		return -ENODEV;

  	revision = i2c_smbus_read_byte_data(client, ADT7462_REG_REVISION);
  	if (revision != ADT7462_REVISION)
  		return -ENODEV;

  
  	strlcpy(info->type, "adt7462", I2C_NAME_SIZE);
  
  	return 0;
  }

  static int adt7462_probe(struct i2c_client *client)

  {

  	struct device *dev = &client->dev;

  	struct adt7462_data *data;

  	struct device *hwmon_dev;

  	data = devm_kzalloc(dev, sizeof(struct adt7462_data), GFP_KERNEL);

  	if (!data)
  		return -ENOMEM;

  	data->client = client;

  	mutex_init(&data->lock);
  
  	dev_info(&client->dev, "%s chip found
  ", client->name);

  	hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
  							   data,
  							   adt7462_groups);
  	return PTR_ERR_OR_ZERO(hwmon_dev);

  }

  static const struct i2c_device_id adt7462_id[] = {
  	{ "adt7462", 0 },
  	{ }
  };
  MODULE_DEVICE_TABLE(i2c, adt7462_id);
  
  static struct i2c_driver adt7462_driver = {
  	.class		= I2C_CLASS_HWMON,
  	.driver = {
  		.name	= "adt7462",
  	},

  	.probe_new	= adt7462_probe,

  	.id_table	= adt7462_id,
  	.detect		= adt7462_detect,
  	.address_list	= normal_i2c,
  };

  module_i2c_driver(adt7462_driver);

  MODULE_AUTHOR("Darrick J. Wong <darrick.wong@oracle.com>");

  MODULE_DESCRIPTION("ADT7462 driver");
  MODULE_LICENSE("GPL");