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

  /*

   * lm85.c - Part of lm_sensors, Linux kernel modules for hardware
   *	    monitoring
   * Copyright (c) 1998, 1999  Frodo Looijaard <frodol@dds.nl>
   * Copyright (c) 2002, 2003  Philip Pokorny <ppokorny@penguincomputing.com>
   * Copyright (c) 2003        Margit Schubert-While <margitsw@t-online.de>
   * Copyright (c) 2004        Justin Thiessen <jthiessen@penguincomputing.com>

   * Copyright (C) 2007--2014  Jean Delvare <jdelvare@suse.de>

   *
   * Chip details at	      <http://www.national.com/ds/LM/LM85.pdf>

   */

  #include <linux/module.h>

  #include <linux/of_device.h>

  #include <linux/init.h>
  #include <linux/slab.h>
  #include <linux/jiffies.h>
  #include <linux/i2c.h>

  #include <linux/hwmon.h>

  #include <linux/hwmon-vid.h>

  #include <linux/hwmon-sysfs.h>

  #include <linux/err.h>

  #include <linux/mutex.h>

  #include <linux/util_macros.h>

  
  /* Addresses to scan */

  static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };

  enum chips {

  	lm85, lm96000,

  	adm1027, adt7463, adt7468,

  	emc6d100, emc6d102, emc6d103, emc6d103s

  };

  
  /* The LM85 registers */

  #define LM85_REG_IN(nr)			(0x20 + (nr))
  #define LM85_REG_IN_MIN(nr)		(0x44 + (nr) * 2)
  #define LM85_REG_IN_MAX(nr)		(0x45 + (nr) * 2)

  #define LM85_REG_TEMP(nr)		(0x25 + (nr))
  #define LM85_REG_TEMP_MIN(nr)		(0x4e + (nr) * 2)
  #define LM85_REG_TEMP_MAX(nr)		(0x4f + (nr) * 2)

  
  /* Fan speeds are LSB, MSB (2 bytes) */

  #define LM85_REG_FAN(nr)		(0x28 + (nr) * 2)
  #define LM85_REG_FAN_MIN(nr)		(0x54 + (nr) * 2)

  #define LM85_REG_PWM(nr)		(0x30 + (nr))

  #define LM85_REG_COMPANY		0x3e
  #define LM85_REG_VERSTEP		0x3f

  #define ADT7468_REG_CFG5		0x7c
  #define ADT7468_OFF64			(1 << 0)
  #define ADT7468_HFPWM			(1 << 1)
  #define IS_ADT7468_OFF64(data)		\

  	((data)->type == adt7468 && !((data)->cfg5 & ADT7468_OFF64))

  #define IS_ADT7468_HFPWM(data)		\

  	((data)->type == adt7468 && !((data)->cfg5 & ADT7468_HFPWM))

  /* These are the recognized values for the above regs */

  #define LM85_COMPANY_NATIONAL		0x01
  #define LM85_COMPANY_ANALOG_DEV		0x41
  #define LM85_COMPANY_SMSC		0x5c

  #define LM85_VERSTEP_LM85C		0x60
  #define LM85_VERSTEP_LM85B		0x62
  #define LM85_VERSTEP_LM96000_1		0x68
  #define LM85_VERSTEP_LM96000_2		0x69
  #define LM85_VERSTEP_ADM1027		0x60
  #define LM85_VERSTEP_ADT7463		0x62
  #define LM85_VERSTEP_ADT7463C		0x6A
  #define LM85_VERSTEP_ADT7468_1		0x71
  #define LM85_VERSTEP_ADT7468_2		0x72
  #define LM85_VERSTEP_EMC6D100_A0        0x60
  #define LM85_VERSTEP_EMC6D100_A1        0x61
  #define LM85_VERSTEP_EMC6D102		0x65
  #define LM85_VERSTEP_EMC6D103_A0	0x68
  #define LM85_VERSTEP_EMC6D103_A1	0x69
  #define LM85_VERSTEP_EMC6D103S		0x6A	/* Also known as EMC6D103:A2 */
  
  #define LM85_REG_CONFIG			0x40
  
  #define LM85_REG_ALARM1			0x41
  #define LM85_REG_ALARM2			0x42
  
  #define LM85_REG_VID			0x43

  
  /* Automated FAN control */

  #define LM85_REG_AFAN_CONFIG(nr)	(0x5c + (nr))
  #define LM85_REG_AFAN_RANGE(nr)		(0x5f + (nr))
  #define LM85_REG_AFAN_SPIKE1		0x62
  #define LM85_REG_AFAN_MINPWM(nr)	(0x64 + (nr))
  #define LM85_REG_AFAN_LIMIT(nr)		(0x67 + (nr))
  #define LM85_REG_AFAN_CRITICAL(nr)	(0x6a + (nr))
  #define LM85_REG_AFAN_HYST1		0x6d
  #define LM85_REG_AFAN_HYST2		0x6e
  
  #define ADM1027_REG_EXTEND_ADC1		0x76
  #define ADM1027_REG_EXTEND_ADC2		0x77

  
  #define EMC6D100_REG_ALARM3             0x7d
  /* IN5, IN6 and IN7 */

  #define EMC6D100_REG_IN(nr)             (0x70 + ((nr) - 5))
  #define EMC6D100_REG_IN_MIN(nr)         (0x73 + ((nr) - 5) * 2)
  #define EMC6D100_REG_IN_MAX(nr)         (0x74 + ((nr) - 5) * 2)
  #define EMC6D102_REG_EXTEND_ADC1	0x85
  #define EMC6D102_REG_EXTEND_ADC2	0x86
  #define EMC6D102_REG_EXTEND_ADC3	0x87
  #define EMC6D102_REG_EXTEND_ADC4	0x88

  /*
   * Conversions. Rounding and limit checking is only done on the TO_REG
   * variants. Note that you should be a bit careful with which arguments
   * these macros are called: arguments may be evaluated more than once.

   */

  /* IN are scaled according to built-in resistors */

  static const int lm85_scaling[] = {  /* .001 Volts */

  	2500, 2250, 3300, 5000, 12000,
  	3300, 1500, 1800 /*EMC6D100*/
  };
  #define SCALE(val, from, to)	(((val) * (to) + ((from) / 2)) / (from))

  #define INS_TO_REG(n, val)	\

  		SCALE(clamp_val(val, 0, 255 * lm85_scaling[n] / 192), \
  		      lm85_scaling[n], 192)

  #define INSEXT_FROM_REG(n, val, ext)	\

  		SCALE(((val) << 4) + (ext), 192 << 4, lm85_scaling[n])

  #define INS_FROM_REG(n, val)	SCALE((val), 192, lm85_scaling[n])

  
  /* FAN speed is measured using 90kHz clock */

  static inline u16 FAN_TO_REG(unsigned long val)
  {
  	if (!val)
  		return 0xffff;

  	return clamp_val(5400000 / val, 1, 0xfffe);

  }

  #define FAN_FROM_REG(val)	((val) == 0 ? -1 : (val) == 0xffff ? 0 : \
  				 5400000 / (val))

  
  /* Temperature is reported in .001 degC increments */
  #define TEMP_TO_REG(val)	\

  		DIV_ROUND_CLOSEST(clamp_val((val), -127000, 127000), 1000)

  #define TEMPEXT_FROM_REG(val, ext)	\

  		SCALE(((val) << 4) + (ext), 16, 1000)
  #define TEMP_FROM_REG(val)	((val) * 1000)

  #define PWM_TO_REG(val)			clamp_val(val, 0, 255)

  #define PWM_FROM_REG(val)		(val)

  /*
   * ZONEs have the following parameters:

   *    Limit (low) temp,           1. degC
   *    Hysteresis (below limit),   1. degC (0-15)
   *    Range of speed control,     .1 degC (2-80)
   *    Critical (high) temp,       1. degC
   *
   * FAN PWMs have the following parameters:
   *    Reference Zone,                 1, 2, 3, etc.
   *    Spinup time,                    .05 sec
   *    PWM value at limit/low temp,    1 count
   *    PWM Frequency,                  1. Hz
   *    PWM is Min or OFF below limit,  flag
   *    Invert PWM output,              flag
   *
   * Some chips filter the temp, others the fan.
   *    Filter constant (or disabled)   .1 seconds
   */
  
  /* These are the zone temperature range encodings in .001 degree C */

  static const int lm85_range_map[] = {

  	2000, 2500, 3300, 4000, 5000, 6600, 8000, 10000,
  	13300, 16000, 20000, 26600, 32000, 40000, 53300, 80000
  };

  static int RANGE_TO_REG(long range)

  {

  	return find_closest(range, lm85_range_map, ARRAY_SIZE(lm85_range_map));

  }

  #define RANGE_FROM_REG(val)	lm85_range_map[(val) & 0x0f]

  /* These are the PWM frequency encodings */

  static const int lm85_freq_map[] = { /* 1 Hz */

  	10, 15, 23, 30, 38, 47, 61, 94
  };

  static const int lm96000_freq_map[] = { /* 1 Hz */
  	10, 15, 23, 30, 38, 47, 61, 94,
  	22500, 24000, 25700, 25700, 27700, 27700, 30000, 30000
  };

  static const int adm1027_freq_map[] = { /* 1 Hz */

  	11, 15, 22, 29, 35, 44, 59, 88

  };

  static int FREQ_TO_REG(const int *map,
  		       unsigned int map_size, unsigned long freq)

  {

  	return find_closest(freq, map, map_size);

  }

  static int FREQ_FROM_REG(const int *map, unsigned int map_size, u8 reg)

  {

  	return map[reg % map_size];

  }

  /*
   * Since we can't use strings, I'm abusing these numbers

   *   to stand in for the following meanings:
   *      1 -- PWM responds to Zone 1
   *      2 -- PWM responds to Zone 2
   *      3 -- PWM responds to Zone 3
   *     23 -- PWM responds to the higher temp of Zone 2 or 3
   *    123 -- PWM responds to highest of Zone 1, 2, or 3
   *      0 -- PWM is always at 0% (ie, off)
   *     -1 -- PWM is always at 100%
   *     -2 -- PWM responds to manual control
   */

  static const int lm85_zone_map[] = { 1, 2, 3, -1, 0, 23, 123, -2 };
  #define ZONE_FROM_REG(val)	lm85_zone_map[(val) >> 5]

  static int ZONE_TO_REG(int zone)

  {
  	int i;

  	for (i = 0; i <= 7; ++i)
  		if (zone == lm85_zone_map[i])
  			break;
  	if (i > 7)   /* Not found. */

  		i = 3;  /* Always 100% */

  	return i << 5;

  }

  #define HYST_TO_REG(val)	clamp_val(((val) + 500) / 1000, 0, 15)

  #define HYST_FROM_REG(val)	((val) * 1000)

  /*
   * Chip sampling rates

   *
   * Some sensors are not updated more frequently than once per second
   *    so it doesn't make sense to read them more often than that.
   *    We cache the results and return the saved data if the driver
   *    is called again before a second has elapsed.
   *
   * Also, there is significant configuration data for this chip
   *    given the automatic PWM fan control that is possible.  There
   *    are about 47 bytes of config data to only 22 bytes of actual
   *    readings.  So, we keep the config data up to date in the cache
   *    when it is written and only sample it once every 1 *minute*
   */
  #define LM85_DATA_INTERVAL  (HZ + HZ / 2)
  #define LM85_CONFIG_INTERVAL  (1 * 60 * HZ)

  /*
   * LM85 can automatically adjust fan speeds based on temperature

   * This structure encapsulates an entire Zone config.  There are
   * three zones (one for each temperature input) on the lm85
   */
  struct lm85_zone {
  	s8 limit;	/* Low temp limit */
  	u8 hyst;	/* Low limit hysteresis. (0-15) */
  	u8 range;	/* Temp range, encoded */
  	s8 critical;	/* "All fans ON" temp limit */

  	u8 max_desired; /*
  			 * Actual "max" temperature specified.  Preserved

  			 * to prevent "drift" as other autofan control
  			 * values change.
  			 */
  };
  
  struct lm85_autofan {
  	u8 config;	/* Register value */

  	u8 min_pwm;	/* Minimum PWM value, encoded */
  	u8 min_off;	/* Min PWM or OFF below "limit", flag */
  };

  /*
   * For each registered chip, we need to keep some data in memory.
   * The structure is dynamically allocated.
   */

  struct lm85_data {

  	struct i2c_client *client;
  	const struct attribute_group *groups[6];

  	const int *freq_map;

  	unsigned int freq_map_size;

  	enum chips type;

  	bool has_vid5;	/* true if VID5 is configured for ADT7463 or ADT7468 */

  	struct mutex update_lock;

  	int valid;		/* !=0 if following fields are valid */
  	unsigned long last_reading;	/* In jiffies */
  	unsigned long last_config;	/* In jiffies */
  
  	u8 in[8];		/* Register value */
  	u8 in_max[8];		/* Register value */
  	u8 in_min[8];		/* Register value */
  	s8 temp[3];		/* Register value */
  	s8 temp_min[3];		/* Register value */
  	s8 temp_max[3];		/* Register value */

  	u16 fan[4];		/* Register value */
  	u16 fan_min[4];		/* Register value */
  	u8 pwm[3];		/* Register value */

  	u8 pwm_freq[3];		/* Register encoding */

  	u8 temp_ext[3];		/* Decoded values */
  	u8 in_ext[8];		/* Decoded values */

  	u8 vid;			/* Register value */
  	u8 vrm;			/* VRM version */

  	u32 alarms;		/* Register encoding, combined */

  	u8 cfg5;		/* Config Register 5 on ADT7468 */

  	struct lm85_autofan autofan[3];
  	struct lm85_zone zone[3];
  };

  static int lm85_read_value(struct i2c_client *client, u8 reg)
  {
  	int res;

  	/* What size location is it? */
  	switch (reg) {
  	case LM85_REG_FAN(0):  /* Read WORD data */
  	case LM85_REG_FAN(1):
  	case LM85_REG_FAN(2):
  	case LM85_REG_FAN(3):
  	case LM85_REG_FAN_MIN(0):
  	case LM85_REG_FAN_MIN(1):
  	case LM85_REG_FAN_MIN(2):
  	case LM85_REG_FAN_MIN(3):
  	case LM85_REG_ALARM1:	/* Read both bytes at once */
  		res = i2c_smbus_read_byte_data(client, reg) & 0xff;
  		res |= i2c_smbus_read_byte_data(client, reg + 1) << 8;
  		break;
  	default:	/* Read BYTE data */
  		res = i2c_smbus_read_byte_data(client, reg);
  		break;
  	}

  	return res;
  }

  static void lm85_write_value(struct i2c_client *client, u8 reg, int value)
  {
  	switch (reg) {
  	case LM85_REG_FAN(0):  /* Write WORD data */
  	case LM85_REG_FAN(1):
  	case LM85_REG_FAN(2):
  	case LM85_REG_FAN(3):
  	case LM85_REG_FAN_MIN(0):
  	case LM85_REG_FAN_MIN(1):
  	case LM85_REG_FAN_MIN(2):
  	case LM85_REG_FAN_MIN(3):
  	/* NOTE: ALARM is read only, so not included here */
  		i2c_smbus_write_byte_data(client, reg, value & 0xff);
  		i2c_smbus_write_byte_data(client, reg + 1, value >> 8);
  		break;
  	default:	/* Write BYTE data */
  		i2c_smbus_write_byte_data(client, reg, value);
  		break;
  	}
  }

  static struct lm85_data *lm85_update_device(struct device *dev)
  {

  	struct lm85_data *data = dev_get_drvdata(dev);
  	struct i2c_client *client = data->client;

  	int i;
  
  	mutex_lock(&data->update_lock);
  
  	if (!data->valid ||
  	     time_after(jiffies, data->last_reading + LM85_DATA_INTERVAL)) {
  		/* Things that change quickly */
  		dev_dbg(&client->dev, "Reading sensor values
  ");
  
  		/*
  		 * Have to read extended bits first to "freeze" the
  		 * more significant bits that are read later.
  		 * There are 2 additional resolution bits per channel and we
  		 * have room for 4, so we shift them to the left.
  		 */
  		if (data->type == adm1027 || data->type == adt7463 ||
  		    data->type == adt7468) {
  			int ext1 = lm85_read_value(client,
  						   ADM1027_REG_EXTEND_ADC1);
  			int ext2 =  lm85_read_value(client,
  						    ADM1027_REG_EXTEND_ADC2);
  			int val = (ext1 << 8) + ext2;
  
  			for (i = 0; i <= 4; i++)
  				data->in_ext[i] =
  					((val >> (i * 2)) & 0x03) << 2;
  
  			for (i = 0; i <= 2; i++)
  				data->temp_ext[i] =
  					(val >> ((i + 4) * 2)) & 0x0c;
  		}
  
  		data->vid = lm85_read_value(client, LM85_REG_VID);
  
  		for (i = 0; i <= 3; ++i) {
  			data->in[i] =
  			    lm85_read_value(client, LM85_REG_IN(i));
  			data->fan[i] =
  			    lm85_read_value(client, LM85_REG_FAN(i));
  		}
  
  		if (!data->has_vid5)
  			data->in[4] = lm85_read_value(client, LM85_REG_IN(4));
  
  		if (data->type == adt7468)
  			data->cfg5 = lm85_read_value(client, ADT7468_REG_CFG5);
  
  		for (i = 0; i <= 2; ++i) {
  			data->temp[i] =
  			    lm85_read_value(client, LM85_REG_TEMP(i));
  			data->pwm[i] =
  			    lm85_read_value(client, LM85_REG_PWM(i));

  			if (IS_ADT7468_OFF64(data))
  				data->temp[i] -= 64;
  		}
  
  		data->alarms = lm85_read_value(client, LM85_REG_ALARM1);
  
  		if (data->type == emc6d100) {
  			/* Three more voltage sensors */
  			for (i = 5; i <= 7; ++i) {
  				data->in[i] = lm85_read_value(client,
  							EMC6D100_REG_IN(i));
  			}
  			/* More alarm bits */
  			data->alarms |= lm85_read_value(client,
  						EMC6D100_REG_ALARM3) << 16;
  		} else if (data->type == emc6d102 || data->type == emc6d103 ||
  			   data->type == emc6d103s) {
  			/*
  			 * Have to read LSB bits after the MSB ones because
  			 * the reading of the MSB bits has frozen the
  			 * LSBs (backward from the ADM1027).
  			 */
  			int ext1 = lm85_read_value(client,
  						   EMC6D102_REG_EXTEND_ADC1);
  			int ext2 = lm85_read_value(client,
  						   EMC6D102_REG_EXTEND_ADC2);
  			int ext3 = lm85_read_value(client,
  						   EMC6D102_REG_EXTEND_ADC3);
  			int ext4 = lm85_read_value(client,
  						   EMC6D102_REG_EXTEND_ADC4);
  			data->in_ext[0] = ext3 & 0x0f;
  			data->in_ext[1] = ext4 & 0x0f;
  			data->in_ext[2] = ext4 >> 4;
  			data->in_ext[3] = ext3 >> 4;
  			data->in_ext[4] = ext2 >> 4;
  
  			data->temp_ext[0] = ext1 & 0x0f;
  			data->temp_ext[1] = ext2 & 0x0f;
  			data->temp_ext[2] = ext1 >> 4;
  		}
  
  		data->last_reading = jiffies;
  	}  /* last_reading */
  
  	if (!data->valid ||
  	     time_after(jiffies, data->last_config + LM85_CONFIG_INTERVAL)) {
  		/* Things that don't change often */
  		dev_dbg(&client->dev, "Reading config values
  ");
  
  		for (i = 0; i <= 3; ++i) {
  			data->in_min[i] =
  			    lm85_read_value(client, LM85_REG_IN_MIN(i));
  			data->in_max[i] =
  			    lm85_read_value(client, LM85_REG_IN_MAX(i));
  			data->fan_min[i] =
  			    lm85_read_value(client, LM85_REG_FAN_MIN(i));
  		}
  
  		if (!data->has_vid5)  {
  			data->in_min[4] = lm85_read_value(client,
  					  LM85_REG_IN_MIN(4));
  			data->in_max[4] = lm85_read_value(client,
  					  LM85_REG_IN_MAX(4));
  		}
  
  		if (data->type == emc6d100) {
  			for (i = 5; i <= 7; ++i) {
  				data->in_min[i] = lm85_read_value(client,
  						EMC6D100_REG_IN_MIN(i));
  				data->in_max[i] = lm85_read_value(client,
  						EMC6D100_REG_IN_MAX(i));
  			}
  		}
  
  		for (i = 0; i <= 2; ++i) {
  			int val;
  
  			data->temp_min[i] =
  			    lm85_read_value(client, LM85_REG_TEMP_MIN(i));
  			data->temp_max[i] =
  			    lm85_read_value(client, LM85_REG_TEMP_MAX(i));
  
  			data->autofan[i].config =
  			    lm85_read_value(client, LM85_REG_AFAN_CONFIG(i));
  			val = lm85_read_value(client, LM85_REG_AFAN_RANGE(i));

  			data->pwm_freq[i] = val % data->freq_map_size;

  			data->zone[i].range = val >> 4;
  			data->autofan[i].min_pwm =
  			    lm85_read_value(client, LM85_REG_AFAN_MINPWM(i));
  			data->zone[i].limit =
  			    lm85_read_value(client, LM85_REG_AFAN_LIMIT(i));
  			data->zone[i].critical =
  			    lm85_read_value(client, LM85_REG_AFAN_CRITICAL(i));
  
  			if (IS_ADT7468_OFF64(data)) {
  				data->temp_min[i] -= 64;
  				data->temp_max[i] -= 64;
  				data->zone[i].limit -= 64;
  				data->zone[i].critical -= 64;
  			}
  		}
  
  		if (data->type != emc6d103s) {
  			i = lm85_read_value(client, LM85_REG_AFAN_SPIKE1);
  			data->autofan[0].min_off = (i & 0x20) != 0;
  			data->autofan[1].min_off = (i & 0x40) != 0;
  			data->autofan[2].min_off = (i & 0x80) != 0;
  
  			i = lm85_read_value(client, LM85_REG_AFAN_HYST1);
  			data->zone[0].hyst = i >> 4;
  			data->zone[1].hyst = i & 0x0f;
  
  			i = lm85_read_value(client, LM85_REG_AFAN_HYST2);
  			data->zone[2].hyst = i >> 4;
  		}
  
  		data->last_config = jiffies;
  	}  /* last_config */
  
  	data->valid = 1;
  
  	mutex_unlock(&data->update_lock);
  
  	return data;
  }

  
  /* 4 Fans */

  static ssize_t fan_show(struct device *dev, struct device_attribute *attr,
  			char *buf)

  {

  	int nr = to_sensor_dev_attr(attr)->index;

  	struct lm85_data *data = lm85_update_device(dev);

  	return sprintf(buf, "%d
  ", FAN_FROM_REG(data->fan[nr]));

  }

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

  {

  	int nr = to_sensor_dev_attr(attr)->index;

  	struct lm85_data *data = lm85_update_device(dev);

  	return sprintf(buf, "%d
  ", FAN_FROM_REG(data->fan_min[nr]));

  }

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

  {

  	int nr = to_sensor_dev_attr(attr)->index;

  	struct lm85_data *data = dev_get_drvdata(dev);
  	struct i2c_client *client = data->client;

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

  	mutex_lock(&data->update_lock);

  	data->fan_min[nr] = FAN_TO_REG(val);
  	lm85_write_value(client, LM85_REG_FAN_MIN(nr), data->fan_min[nr]);

  	mutex_unlock(&data->update_lock);

  	return count;
  }

  static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0);
  static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0);
  static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1);
  static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1);
  static SENSOR_DEVICE_ATTR_RO(fan3_input, fan, 2);
  static SENSOR_DEVICE_ATTR_RW(fan3_min, fan_min, 2);
  static SENSOR_DEVICE_ATTR_RO(fan4_input, fan, 3);
  static SENSOR_DEVICE_ATTR_RW(fan4_min, fan_min, 3);

  
  /* vid, vrm, alarms */

  static ssize_t cpu0_vid_show(struct device *dev,
  			     struct device_attribute *attr, char *buf)

  {
  	struct lm85_data *data = lm85_update_device(dev);

  	int vid;

  	if (data->has_vid5) {

  		/* 6-pin VID (VRM 10) */
  		vid = vid_from_reg(data->vid & 0x3f, data->vrm);
  	} else {
  		/* 5-pin VID (VRM 9) */
  		vid = vid_from_reg(data->vid & 0x1f, data->vrm);
  	}
  
  	return sprintf(buf, "%d
  ", vid);

  }

  static DEVICE_ATTR_RO(cpu0_vid);

  static ssize_t vrm_show(struct device *dev, struct device_attribute *attr,
  			char *buf)

  {

  	struct lm85_data *data = dev_get_drvdata(dev);

  	return sprintf(buf, "%ld
  ", (long) data->vrm);
  }

  static ssize_t vrm_store(struct device *dev, struct device_attribute *attr,
  			 const char *buf, size_t count)

  {

  	struct lm85_data *data = dev_get_drvdata(dev);

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

  	if (val > 255)
  		return -EINVAL;

  	data->vrm = val;

  	return count;
  }

  static DEVICE_ATTR_RW(vrm);

  static ssize_t alarms_show(struct device *dev, struct device_attribute *attr,
  			   char *buf)

  {
  	struct lm85_data *data = lm85_update_device(dev);

  	return sprintf(buf, "%u
  ", data->alarms);

  }

  static DEVICE_ATTR_RO(alarms);

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

  {
  	int nr = to_sensor_dev_attr(attr)->index;
  	struct lm85_data *data = lm85_update_device(dev);
  	return sprintf(buf, "%u
  ", (data->alarms >> nr) & 1);
  }

  static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 0);
  static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 1);
  static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 2);
  static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3);
  static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 8);
  static SENSOR_DEVICE_ATTR_RO(in5_alarm, alarm, 18);
  static SENSOR_DEVICE_ATTR_RO(in6_alarm, alarm, 16);
  static SENSOR_DEVICE_ATTR_RO(in7_alarm, alarm, 17);
  static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 4);
  static SENSOR_DEVICE_ATTR_RO(temp1_fault, alarm, 14);
  static SENSOR_DEVICE_ATTR_RO(temp2_alarm, alarm, 5);
  static SENSOR_DEVICE_ATTR_RO(temp3_alarm, alarm, 6);
  static SENSOR_DEVICE_ATTR_RO(temp3_fault, alarm, 15);
  static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 10);
  static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 11);
  static SENSOR_DEVICE_ATTR_RO(fan3_alarm, alarm, 12);
  static SENSOR_DEVICE_ATTR_RO(fan4_alarm, alarm, 13);

  /* pwm */

  static ssize_t pwm_show(struct device *dev, struct device_attribute *attr,
  			char *buf)

  {

  	int nr = to_sensor_dev_attr(attr)->index;

  	struct lm85_data *data = lm85_update_device(dev);

  	return sprintf(buf, "%d
  ", PWM_FROM_REG(data->pwm[nr]));

  }

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

  {

  	int nr = to_sensor_dev_attr(attr)->index;

  	struct lm85_data *data = dev_get_drvdata(dev);
  	struct i2c_client *client = data->client;

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

  	mutex_lock(&data->update_lock);

  	data->pwm[nr] = PWM_TO_REG(val);
  	lm85_write_value(client, LM85_REG_PWM(nr), data->pwm[nr]);

  	mutex_unlock(&data->update_lock);

  	return count;
  }

  static ssize_t pwm_enable_show(struct device *dev,
  			       struct device_attribute *attr, char *buf)

  {

  	int nr = to_sensor_dev_attr(attr)->index;

  	struct lm85_data *data = lm85_update_device(dev);

  	int pwm_zone, enable;

  
  	pwm_zone = ZONE_FROM_REG(data->autofan[nr].config);

  	switch (pwm_zone) {
  	case -1:	/* PWM is always at 100% */
  		enable = 0;
  		break;
  	case 0:		/* PWM is always at 0% */
  	case -2:	/* PWM responds to manual control */
  		enable = 1;
  		break;
  	default:	/* PWM in automatic mode */
  		enable = 2;
  	}
  	return sprintf(buf, "%d
  ", enable);

  }

  static ssize_t pwm_enable_store(struct device *dev,
  				struct device_attribute *attr,
  				const char *buf, size_t count)

  {
  	int nr = to_sensor_dev_attr(attr)->index;

  	struct lm85_data *data = dev_get_drvdata(dev);
  	struct i2c_client *client = data->client;

  	u8 config;

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

  
  	switch (val) {
  	case 0:
  		config = 3;
  		break;
  	case 1:
  		config = 7;
  		break;
  	case 2:

  		/*
  		 * Here we have to choose arbitrarily one of the 5 possible
  		 * configurations; I go for the safest
  		 */

  		config = 6;
  		break;
  	default:
  		return -EINVAL;
  	}
  
  	mutex_lock(&data->update_lock);
  	data->autofan[nr].config = lm85_read_value(client,
  		LM85_REG_AFAN_CONFIG(nr));
  	data->autofan[nr].config = (data->autofan[nr].config & ~0xe0)
  		| (config << 5);
  	lm85_write_value(client, LM85_REG_AFAN_CONFIG(nr),
  		data->autofan[nr].config);
  	mutex_unlock(&data->update_lock);
  	return count;
  }

  static ssize_t pwm_freq_show(struct device *dev,
  			     struct device_attribute *attr, char *buf)

  {
  	int nr = to_sensor_dev_attr(attr)->index;
  	struct lm85_data *data = lm85_update_device(dev);

  	int freq;
  
  	if (IS_ADT7468_HFPWM(data))
  		freq = 22500;
  	else

  		freq = FREQ_FROM_REG(data->freq_map, data->freq_map_size,
  				     data->pwm_freq[nr]);

  
  	return sprintf(buf, "%d
  ", freq);

  }

  static ssize_t pwm_freq_store(struct device *dev,
  			      struct device_attribute *attr, const char *buf,
  			      size_t count)

  {
  	int nr = to_sensor_dev_attr(attr)->index;

  	struct lm85_data *data = dev_get_drvdata(dev);
  	struct i2c_client *client = data->client;

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

  
  	mutex_lock(&data->update_lock);

  	/*
  	 * The ADT7468 has a special high-frequency PWM output mode,

  	 * where all PWM outputs are driven by a 22.5 kHz clock.

  	 * This might confuse the user, but there's not much we can do.
  	 */

  	if (data->type == adt7468 && val >= 11300) {	/* High freq. mode */
  		data->cfg5 &= ~ADT7468_HFPWM;
  		lm85_write_value(client, ADT7468_REG_CFG5, data->cfg5);
  	} else {					/* Low freq. mode */

  		data->pwm_freq[nr] = FREQ_TO_REG(data->freq_map,

  						 data->freq_map_size, val);

  		lm85_write_value(client, LM85_REG_AFAN_RANGE(nr),
  				 (data->zone[nr].range << 4)
  				 | data->pwm_freq[nr]);
  		if (data->type == adt7468) {
  			data->cfg5 |= ADT7468_HFPWM;
  			lm85_write_value(client, ADT7468_REG_CFG5, data->cfg5);
  		}
  	}

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

  static SENSOR_DEVICE_ATTR_RW(pwm1, pwm, 0);
  static SENSOR_DEVICE_ATTR_RW(pwm1_enable, pwm_enable, 0);
  static SENSOR_DEVICE_ATTR_RW(pwm1_freq, pwm_freq, 0);
  static SENSOR_DEVICE_ATTR_RW(pwm2, pwm, 1);
  static SENSOR_DEVICE_ATTR_RW(pwm2_enable, pwm_enable, 1);
  static SENSOR_DEVICE_ATTR_RW(pwm2_freq, pwm_freq, 1);
  static SENSOR_DEVICE_ATTR_RW(pwm3, pwm, 2);
  static SENSOR_DEVICE_ATTR_RW(pwm3_enable, pwm_enable, 2);
  static SENSOR_DEVICE_ATTR_RW(pwm3_freq, pwm_freq, 2);

  
  /* Voltages */

  static ssize_t in_show(struct device *dev, struct device_attribute *attr,
  		       char *buf)

  {

  	int nr = to_sensor_dev_attr(attr)->index;

  	struct lm85_data *data = lm85_update_device(dev);

  	return sprintf(buf, "%d
  ", INSEXT_FROM_REG(nr, data->in[nr],
  						    data->in_ext[nr]));

  }

  static ssize_t in_min_show(struct device *dev, struct device_attribute *attr,
  			   char *buf)

  {

  	int nr = to_sensor_dev_attr(attr)->index;

  	struct lm85_data *data = lm85_update_device(dev);

  	return sprintf(buf, "%d
  ", INS_FROM_REG(nr, data->in_min[nr]));

  }

  static ssize_t in_min_store(struct device *dev, struct device_attribute *attr,
  			    const char *buf, size_t count)

  {

  	int nr = to_sensor_dev_attr(attr)->index;

  	struct lm85_data *data = dev_get_drvdata(dev);
  	struct i2c_client *client = data->client;

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

  	mutex_lock(&data->update_lock);

  	data->in_min[nr] = INS_TO_REG(nr, val);
  	lm85_write_value(client, LM85_REG_IN_MIN(nr), data->in_min[nr]);

  	mutex_unlock(&data->update_lock);

  	return count;
  }

  static ssize_t in_max_show(struct device *dev, struct device_attribute *attr,
  			   char *buf)

  {

  	int nr = to_sensor_dev_attr(attr)->index;

  	struct lm85_data *data = lm85_update_device(dev);

  	return sprintf(buf, "%d
  ", INS_FROM_REG(nr, data->in_max[nr]));

  }

  static ssize_t in_max_store(struct device *dev, struct device_attribute *attr,
  			    const char *buf, size_t count)

  {

  	int nr = to_sensor_dev_attr(attr)->index;

  	struct lm85_data *data = dev_get_drvdata(dev);
  	struct i2c_client *client = data->client;

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

  	mutex_lock(&data->update_lock);

  	data->in_max[nr] = INS_TO_REG(nr, val);
  	lm85_write_value(client, LM85_REG_IN_MAX(nr), data->in_max[nr]);

  	mutex_unlock(&data->update_lock);

  	return count;
  }

  static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0);
  static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0);
  static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0);
  static SENSOR_DEVICE_ATTR_RO(in1_input, in, 1);
  static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1);
  static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1);
  static SENSOR_DEVICE_ATTR_RO(in2_input, in, 2);
  static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2);
  static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2);
  static SENSOR_DEVICE_ATTR_RO(in3_input, in, 3);
  static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3);
  static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3);
  static SENSOR_DEVICE_ATTR_RO(in4_input, in, 4);
  static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4);
  static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4);
  static SENSOR_DEVICE_ATTR_RO(in5_input, in, 5);
  static SENSOR_DEVICE_ATTR_RW(in5_min, in_min, 5);
  static SENSOR_DEVICE_ATTR_RW(in5_max, in_max, 5);
  static SENSOR_DEVICE_ATTR_RO(in6_input, in, 6);
  static SENSOR_DEVICE_ATTR_RW(in6_min, in_min, 6);
  static SENSOR_DEVICE_ATTR_RW(in6_max, in_max, 6);
  static SENSOR_DEVICE_ATTR_RO(in7_input, in, 7);
  static SENSOR_DEVICE_ATTR_RW(in7_min, in_min, 7);
  static SENSOR_DEVICE_ATTR_RW(in7_max, in_max, 7);

  
  /* Temps */

  static ssize_t temp_show(struct device *dev, struct device_attribute *attr,
  			 char *buf)

  {

  	int nr = to_sensor_dev_attr(attr)->index;

  	struct lm85_data *data = lm85_update_device(dev);

  	return sprintf(buf, "%d
  ", TEMPEXT_FROM_REG(data->temp[nr],
  						     data->temp_ext[nr]));

  }

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

  {

  	int nr = to_sensor_dev_attr(attr)->index;

  	struct lm85_data *data = lm85_update_device(dev);

  	return sprintf(buf, "%d
  ", TEMP_FROM_REG(data->temp_min[nr]));

  }

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

  {

  	int nr = to_sensor_dev_attr(attr)->index;

  	struct lm85_data *data = dev_get_drvdata(dev);
  	struct i2c_client *client = data->client;

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

  	if (IS_ADT7468_OFF64(data))
  		val += 64;

  	mutex_lock(&data->update_lock);

  	data->temp_min[nr] = TEMP_TO_REG(val);
  	lm85_write_value(client, LM85_REG_TEMP_MIN(nr), data->temp_min[nr]);

  	mutex_unlock(&data->update_lock);

  	return count;
  }

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

  {

  	int nr = to_sensor_dev_attr(attr)->index;

  	struct lm85_data *data = lm85_update_device(dev);

  	return sprintf(buf, "%d
  ", TEMP_FROM_REG(data->temp_max[nr]));

  }

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

  {

  	int nr = to_sensor_dev_attr(attr)->index;

  	struct lm85_data *data = dev_get_drvdata(dev);
  	struct i2c_client *client = data->client;

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

  	if (IS_ADT7468_OFF64(data))
  		val += 64;

  	mutex_lock(&data->update_lock);

  	data->temp_max[nr] = TEMP_TO_REG(val);
  	lm85_write_value(client, LM85_REG_TEMP_MAX(nr), data->temp_max[nr]);

  	mutex_unlock(&data->update_lock);

  	return count;
  }

  static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0);
  static SENSOR_DEVICE_ATTR_RW(temp1_min, temp_min, 0);
  static SENSOR_DEVICE_ATTR_RW(temp1_max, temp_max, 0);
  static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1);
  static SENSOR_DEVICE_ATTR_RW(temp2_min, temp_min, 1);
  static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1);
  static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2);
  static SENSOR_DEVICE_ATTR_RW(temp3_min, temp_min, 2);
  static SENSOR_DEVICE_ATTR_RW(temp3_max, temp_max, 2);

  
  /* Automatic PWM control */

  static ssize_t pwm_auto_channels_show(struct device *dev,
  				      struct device_attribute *attr,
  				      char *buf)

  {

  	int nr = to_sensor_dev_attr(attr)->index;

  	struct lm85_data *data = lm85_update_device(dev);

  	return sprintf(buf, "%d
  ", ZONE_FROM_REG(data->autofan[nr].config));

  }

  static ssize_t pwm_auto_channels_store(struct device *dev,
  				       struct device_attribute *attr,
  				       const char *buf, size_t count)

  {

  	int nr = to_sensor_dev_attr(attr)->index;

  	struct lm85_data *data = dev_get_drvdata(dev);
  	struct i2c_client *client = data->client;

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

  	mutex_lock(&data->update_lock);

  	data->autofan[nr].config = (data->autofan[nr].config & (~0xe0))

  		| ZONE_TO_REG(val);

  	lm85_write_value(client, LM85_REG_AFAN_CONFIG(nr),
  		data->autofan[nr].config);

  	mutex_unlock(&data->update_lock);

  	return count;
  }

  static ssize_t pwm_auto_pwm_min_show(struct device *dev,
  				     struct device_attribute *attr, char *buf)

  {

  	int nr = to_sensor_dev_attr(attr)->index;

  	struct lm85_data *data = lm85_update_device(dev);

  	return sprintf(buf, "%d
  ", PWM_FROM_REG(data->autofan[nr].min_pwm));

  }

  static ssize_t pwm_auto_pwm_min_store(struct device *dev,
  				      struct device_attribute *attr,
  				      const char *buf, size_t count)

  {

  	int nr = to_sensor_dev_attr(attr)->index;

  	struct lm85_data *data = dev_get_drvdata(dev);
  	struct i2c_client *client = data->client;

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

  	mutex_lock(&data->update_lock);

  	data->autofan[nr].min_pwm = PWM_TO_REG(val);
  	lm85_write_value(client, LM85_REG_AFAN_MINPWM(nr),
  		data->autofan[nr].min_pwm);

  	mutex_unlock(&data->update_lock);

  	return count;
  }

  static ssize_t pwm_auto_pwm_minctl_show(struct device *dev,
  					struct device_attribute *attr,
  					char *buf)

  {

  	int nr = to_sensor_dev_attr(attr)->index;

  	struct lm85_data *data = lm85_update_device(dev);

  	return sprintf(buf, "%d
  ", data->autofan[nr].min_off);

  }

  static ssize_t pwm_auto_pwm_minctl_store(struct device *dev,
  					 struct device_attribute *attr,
  					 const char *buf, size_t count)

  {

  	int nr = to_sensor_dev_attr(attr)->index;

  	struct lm85_data *data = dev_get_drvdata(dev);
  	struct i2c_client *client = data->client;

  	u8 tmp;

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

  	mutex_lock(&data->update_lock);

  	data->autofan[nr].min_off = val;

  	tmp = lm85_read_value(client, LM85_REG_AFAN_SPIKE1);
  	tmp &= ~(0x20 << nr);
  	if (data->autofan[nr].min_off)
  		tmp |= 0x20 << nr;
  	lm85_write_value(client, LM85_REG_AFAN_SPIKE1, tmp);

  	mutex_unlock(&data->update_lock);

  	return count;
  }

  static SENSOR_DEVICE_ATTR_RW(pwm1_auto_channels, pwm_auto_channels, 0);
  static SENSOR_DEVICE_ATTR_RW(pwm1_auto_pwm_min, pwm_auto_pwm_min, 0);
  static SENSOR_DEVICE_ATTR_RW(pwm1_auto_pwm_minctl, pwm_auto_pwm_minctl, 0);
  static SENSOR_DEVICE_ATTR_RW(pwm2_auto_channels, pwm_auto_channels, 1);
  static SENSOR_DEVICE_ATTR_RW(pwm2_auto_pwm_min, pwm_auto_pwm_min, 1);
  static SENSOR_DEVICE_ATTR_RW(pwm2_auto_pwm_minctl, pwm_auto_pwm_minctl, 1);
  static SENSOR_DEVICE_ATTR_RW(pwm3_auto_channels, pwm_auto_channels, 2);
  static SENSOR_DEVICE_ATTR_RW(pwm3_auto_pwm_min, pwm_auto_pwm_min, 2);
  static SENSOR_DEVICE_ATTR_RW(pwm3_auto_pwm_minctl, pwm_auto_pwm_minctl, 2);

  
  /* Temperature settings for automatic PWM control */

  static ssize_t temp_auto_temp_off_show(struct device *dev,
  				       struct device_attribute *attr,
  				       char *buf)

  {

  	int nr = to_sensor_dev_attr(attr)->index;

  	struct lm85_data *data = lm85_update_device(dev);

  	return sprintf(buf, "%d
  ", TEMP_FROM_REG(data->zone[nr].limit) -

  		HYST_FROM_REG(data->zone[nr].hyst));
  }

  static ssize_t temp_auto_temp_off_store(struct device *dev,
  					struct device_attribute *attr,
  					const char *buf, size_t count)

  {

  	int nr = to_sensor_dev_attr(attr)->index;

  	struct lm85_data *data = dev_get_drvdata(dev);
  	struct i2c_client *client = data->client;

  	int min;

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

  	mutex_lock(&data->update_lock);

  	min = TEMP_FROM_REG(data->zone[nr].limit);

  	data->zone[nr].hyst = HYST_TO_REG(min - val);

  	if (nr == 0 || nr == 1) {

  		lm85_write_value(client, LM85_REG_AFAN_HYST1,
  			(data->zone[0].hyst << 4)

  			| data->zone[1].hyst);

  	} else {
  		lm85_write_value(client, LM85_REG_AFAN_HYST2,

  			(data->zone[2].hyst << 4));

  	}

  	mutex_unlock(&data->update_lock);

  	return count;
  }

  static ssize_t temp_auto_temp_min_show(struct device *dev,
  				       struct device_attribute *attr,
  				       char *buf)

  {

  	int nr = to_sensor_dev_attr(attr)->index;

  	struct lm85_data *data = lm85_update_device(dev);

  	return sprintf(buf, "%d
  ", TEMP_FROM_REG(data->zone[nr].limit));

  }

  static ssize_t temp_auto_temp_min_store(struct device *dev,
  					struct device_attribute *attr,
  					const char *buf, size_t count)

  {

  	int nr = to_sensor_dev_attr(attr)->index;

  	struct lm85_data *data = dev_get_drvdata(dev);
  	struct i2c_client *client = data->client;

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

  	mutex_lock(&data->update_lock);

  	data->zone[nr].limit = TEMP_TO_REG(val);
  	lm85_write_value(client, LM85_REG_AFAN_LIMIT(nr),
  		data->zone[nr].limit);
  
  /* Update temp_auto_max and temp_auto_range */
  	data->zone[nr].range = RANGE_TO_REG(
  		TEMP_FROM_REG(data->zone[nr].max_desired) -
  		TEMP_FROM_REG(data->zone[nr].limit));
  	lm85_write_value(client, LM85_REG_AFAN_RANGE(nr),
  		((data->zone[nr].range & 0x0f) << 4)

  		| data->pwm_freq[nr]);

  	mutex_unlock(&data->update_lock);

  	return count;
  }

  static ssize_t temp_auto_temp_max_show(struct device *dev,
  				       struct device_attribute *attr,
  				       char *buf)

  {

  	int nr = to_sensor_dev_attr(attr)->index;

  	struct lm85_data *data = lm85_update_device(dev);

  	return sprintf(buf, "%d
  ", TEMP_FROM_REG(data->zone[nr].limit) +

  		RANGE_FROM_REG(data->zone[nr].range));
  }

  static ssize_t temp_auto_temp_max_store(struct device *dev,
  					struct device_attribute *attr,
  					const char *buf, size_t count)

  {

  	int nr = to_sensor_dev_attr(attr)->index;

  	struct lm85_data *data = dev_get_drvdata(dev);
  	struct i2c_client *client = data->client;

  	int min;

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

  	mutex_lock(&data->update_lock);

  	min = TEMP_FROM_REG(data->zone[nr].limit);
  	data->zone[nr].max_desired = TEMP_TO_REG(val);
  	data->zone[nr].range = RANGE_TO_REG(
  		val - min);
  	lm85_write_value(client, LM85_REG_AFAN_RANGE(nr),
  		((data->zone[nr].range & 0x0f) << 4)

  		| data->pwm_freq[nr]);

  	mutex_unlock(&data->update_lock);

  	return count;
  }

  static ssize_t temp_auto_temp_crit_show(struct device *dev,
  					struct device_attribute *attr,
  					char *buf)

  {

  	int nr = to_sensor_dev_attr(attr)->index;

  	struct lm85_data *data = lm85_update_device(dev);

  	return sprintf(buf, "%d
  ", TEMP_FROM_REG(data->zone[nr].critical));

  }

  static ssize_t temp_auto_temp_crit_store(struct device *dev,
  					 struct device_attribute *attr,
  					 const char *buf, size_t count)

  {

  	int nr = to_sensor_dev_attr(attr)->index;

  	struct lm85_data *data = dev_get_drvdata(dev);
  	struct i2c_client *client = data->client;

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

  	mutex_lock(&data->update_lock);

  	data->zone[nr].critical = TEMP_TO_REG(val);
  	lm85_write_value(client, LM85_REG_AFAN_CRITICAL(nr),
  		data->zone[nr].critical);

  	mutex_unlock(&data->update_lock);

  	return count;
  }

  static SENSOR_DEVICE_ATTR_RW(temp1_auto_temp_off, temp_auto_temp_off, 0);
  static SENSOR_DEVICE_ATTR_RW(temp1_auto_temp_min, temp_auto_temp_min, 0);
  static SENSOR_DEVICE_ATTR_RW(temp1_auto_temp_max, temp_auto_temp_max, 0);
  static SENSOR_DEVICE_ATTR_RW(temp1_auto_temp_crit, temp_auto_temp_crit, 0);
  static SENSOR_DEVICE_ATTR_RW(temp2_auto_temp_off, temp_auto_temp_off, 1);
  static SENSOR_DEVICE_ATTR_RW(temp2_auto_temp_min, temp_auto_temp_min, 1);
  static SENSOR_DEVICE_ATTR_RW(temp2_auto_temp_max, temp_auto_temp_max, 1);
  static SENSOR_DEVICE_ATTR_RW(temp2_auto_temp_crit, temp_auto_temp_crit, 1);
  static SENSOR_DEVICE_ATTR_RW(temp3_auto_temp_off, temp_auto_temp_off, 2);
  static SENSOR_DEVICE_ATTR_RW(temp3_auto_temp_min, temp_auto_temp_min, 2);
  static SENSOR_DEVICE_ATTR_RW(temp3_auto_temp_max, temp_auto_temp_max, 2);
  static SENSOR_DEVICE_ATTR_RW(temp3_auto_temp_crit, temp_auto_temp_crit, 2);

  static struct attribute *lm85_attributes[] = {

  	&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_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_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_pwm1.dev_attr.attr,
  	&sensor_dev_attr_pwm2.dev_attr.attr,
  	&sensor_dev_attr_pwm3.dev_attr.attr,
  	&sensor_dev_attr_pwm1_enable.dev_attr.attr,
  	&sensor_dev_attr_pwm2_enable.dev_attr.attr,
  	&sensor_dev_attr_pwm3_enable.dev_attr.attr,

  	&sensor_dev_attr_pwm1_freq.dev_attr.attr,
  	&sensor_dev_attr_pwm2_freq.dev_attr.attr,
  	&sensor_dev_attr_pwm3_freq.dev_attr.attr,

  
  	&sensor_dev_attr_in0_input.dev_attr.attr,
  	&sensor_dev_attr_in1_input.dev_attr.attr,
  	&sensor_dev_attr_in2_input.dev_attr.attr,
  	&sensor_dev_attr_in3_input.dev_attr.attr,
  	&sensor_dev_attr_in0_min.dev_attr.attr,
  	&sensor_dev_attr_in1_min.dev_attr.attr,
  	&sensor_dev_attr_in2_min.dev_attr.attr,
  	&sensor_dev_attr_in3_min.dev_attr.attr,
  	&sensor_dev_attr_in0_max.dev_attr.attr,
  	&sensor_dev_attr_in1_max.dev_attr.attr,
  	&sensor_dev_attr_in2_max.dev_attr.attr,
  	&sensor_dev_attr_in3_max.dev_attr.attr,

  	&sensor_dev_attr_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_temp1_input.dev_attr.attr,
  	&sensor_dev_attr_temp2_input.dev_attr.attr,
  	&sensor_dev_attr_temp3_input.dev_attr.attr,
  	&sensor_dev_attr_temp1_min.dev_attr.attr,
  	&sensor_dev_attr_temp2_min.dev_attr.attr,
  	&sensor_dev_attr_temp3_min.dev_attr.attr,
  	&sensor_dev_attr_temp1_max.dev_attr.attr,
  	&sensor_dev_attr_temp2_max.dev_attr.attr,
  	&sensor_dev_attr_temp3_max.dev_attr.attr,

  	&sensor_dev_attr_temp1_alarm.dev_attr.attr,
  	&sensor_dev_attr_temp2_alarm.dev_attr.attr,
  	&sensor_dev_attr_temp3_alarm.dev_attr.attr,
  	&sensor_dev_attr_temp1_fault.dev_attr.attr,
  	&sensor_dev_attr_temp3_fault.dev_attr.attr,

  
  	&sensor_dev_attr_pwm1_auto_channels.dev_attr.attr,
  	&sensor_dev_attr_pwm2_auto_channels.dev_attr.attr,
  	&sensor_dev_attr_pwm3_auto_channels.dev_attr.attr,
  	&sensor_dev_attr_pwm1_auto_pwm_min.dev_attr.attr,
  	&sensor_dev_attr_pwm2_auto_pwm_min.dev_attr.attr,
  	&sensor_dev_attr_pwm3_auto_pwm_min.dev_attr.attr,

  	&sensor_dev_attr_temp1_auto_temp_min.dev_attr.attr,
  	&sensor_dev_attr_temp2_auto_temp_min.dev_attr.attr,
  	&sensor_dev_attr_temp3_auto_temp_min.dev_attr.attr,
  	&sensor_dev_attr_temp1_auto_temp_max.dev_attr.attr,
  	&sensor_dev_attr_temp2_auto_temp_max.dev_attr.attr,
  	&sensor_dev_attr_temp3_auto_temp_max.dev_attr.attr,
  	&sensor_dev_attr_temp1_auto_temp_crit.dev_attr.attr,
  	&sensor_dev_attr_temp2_auto_temp_crit.dev_attr.attr,
  	&sensor_dev_attr_temp3_auto_temp_crit.dev_attr.attr,

  	&dev_attr_vrm.attr,
  	&dev_attr_cpu0_vid.attr,
  	&dev_attr_alarms.attr,

  	NULL
  };
  
  static const struct attribute_group lm85_group = {
  	.attrs = lm85_attributes,
  };

  static struct attribute *lm85_attributes_minctl[] = {
  	&sensor_dev_attr_pwm1_auto_pwm_minctl.dev_attr.attr,
  	&sensor_dev_attr_pwm2_auto_pwm_minctl.dev_attr.attr,
  	&sensor_dev_attr_pwm3_auto_pwm_minctl.dev_attr.attr,

  	NULL

  };
  
  static const struct attribute_group lm85_group_minctl = {
  	.attrs = lm85_attributes_minctl,
  };
  
  static struct attribute *lm85_attributes_temp_off[] = {
  	&sensor_dev_attr_temp1_auto_temp_off.dev_attr.attr,
  	&sensor_dev_attr_temp2_auto_temp_off.dev_attr.attr,
  	&sensor_dev_attr_temp3_auto_temp_off.dev_attr.attr,

  	NULL

  };
  
  static const struct attribute_group lm85_group_temp_off = {
  	.attrs = lm85_attributes_temp_off,
  };

  static struct attribute *lm85_attributes_in4[] = {

  	&sensor_dev_attr_in4_input.dev_attr.attr,
  	&sensor_dev_attr_in4_min.dev_attr.attr,
  	&sensor_dev_attr_in4_max.dev_attr.attr,

  	&sensor_dev_attr_in4_alarm.dev_attr.attr,

  	NULL
  };

  static const struct attribute_group lm85_group_in4 = {
  	.attrs = lm85_attributes_in4,
  };
  
  static struct attribute *lm85_attributes_in567[] = {
  	&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_in5_min.dev_attr.attr,
  	&sensor_dev_attr_in6_min.dev_attr.attr,
  	&sensor_dev_attr_in7_min.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_in5_alarm.dev_attr.attr,
  	&sensor_dev_attr_in6_alarm.dev_attr.attr,
  	&sensor_dev_attr_in7_alarm.dev_attr.attr,

  	NULL
  };
  
  static const struct attribute_group lm85_group_in567 = {
  	.attrs = lm85_attributes_in567,

  };

  static void lm85_init_client(struct i2c_client *client)
  {
  	int value;
  
  	/* Start monitoring if needed */
  	value = lm85_read_value(client, LM85_REG_CONFIG);
  	if (!(value & 0x01)) {
  		dev_info(&client->dev, "Starting monitoring
  ");
  		lm85_write_value(client, LM85_REG_CONFIG, value | 0x01);
  	}
  
  	/* Warn about unusual configuration bits */
  	if (value & 0x02)
  		dev_warn(&client->dev, "Device configuration is locked
  ");
  	if (!(value & 0x04))
  		dev_warn(&client->dev, "Device is not ready
  ");
  }

  static int lm85_is_fake(struct i2c_client *client)
  {
  	/*
  	 * Differenciate between real LM96000 and Winbond WPCD377I. The latter
  	 * emulate the former except that it has no hardware monitoring function
  	 * so the readings are always 0.
  	 */
  	int i;
  	u8 in_temp, fan;
  
  	for (i = 0; i < 8; i++) {
  		in_temp = i2c_smbus_read_byte_data(client, 0x20 + i);
  		fan = i2c_smbus_read_byte_data(client, 0x28 + i);
  		if (in_temp != 0x00 || fan != 0xff)
  			return 0;
  	}
  
  	return 1;
  }

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

  static int lm85_detect(struct i2c_client *client, struct i2c_board_info *info)

  {

  	struct i2c_adapter *adapter = client->adapter;
  	int address = client->addr;

  	const char *type_name = NULL;

  	int company, verstep;

  	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {

  		/* We need to be able to do byte I/O */

  		return -ENODEV;

  	}

  	/* Determine the chip type */
  	company = lm85_read_value(client, LM85_REG_COMPANY);
  	verstep = lm85_read_value(client, LM85_REG_VERSTEP);

  	dev_dbg(&adapter->dev,
  		"Detecting device at 0x%02x with COMPANY: 0x%02x and VERSTEP: 0x%02x
  ",

  		address, company, verstep);

  	if (company == LM85_COMPANY_NATIONAL) {
  		switch (verstep) {
  		case LM85_VERSTEP_LM85C:
  			type_name = "lm85c";
  			break;
  		case LM85_VERSTEP_LM85B:
  			type_name = "lm85b";
  			break;
  		case LM85_VERSTEP_LM96000_1:
  		case LM85_VERSTEP_LM96000_2:
  			/* Check for Winbond WPCD377I */
  			if (lm85_is_fake(client)) {
  				dev_dbg(&adapter->dev,
  					"Found Winbond WPCD377I, ignoring
  ");
  				return -ENODEV;

  			}

  			type_name = "lm96000";

  			break;
  		}
  	} else if (company == LM85_COMPANY_ANALOG_DEV) {
  		switch (verstep) {
  		case LM85_VERSTEP_ADM1027:
  			type_name = "adm1027";
  			break;
  		case LM85_VERSTEP_ADT7463:
  		case LM85_VERSTEP_ADT7463C:
  			type_name = "adt7463";
  			break;
  		case LM85_VERSTEP_ADT7468_1:
  		case LM85_VERSTEP_ADT7468_2:
  			type_name = "adt7468";
  			break;

  		}

  	} else if (company == LM85_COMPANY_SMSC) {
  		switch (verstep) {
  		case LM85_VERSTEP_EMC6D100_A0:
  		case LM85_VERSTEP_EMC6D100_A1:
  			/* Note: we can't tell a '100 from a '101 */
  			type_name = "emc6d100";
  			break;
  		case LM85_VERSTEP_EMC6D102:
  			type_name = "emc6d102";
  			break;

  		case LM85_VERSTEP_EMC6D103_A0:
  		case LM85_VERSTEP_EMC6D103_A1:
  			type_name = "emc6d103";
  			break;

  		case LM85_VERSTEP_EMC6D103S:
  			type_name = "emc6d103s";
  			break;

  		}

  	}

  	if (!type_name)
  		return -ENODEV;

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

  static int lm85_probe(struct i2c_client *client, const struct i2c_device_id *id)

  {

  	struct device *dev = &client->dev;
  	struct device *hwmon_dev;

  	struct lm85_data *data;

  	int idx = 0;

  	data = devm_kzalloc(dev, sizeof(struct lm85_data), GFP_KERNEL);

  	if (!data)
  		return -ENOMEM;

  	data->client = client;

  	if (client->dev.of_node)
  		data->type = (enum chips)of_device_get_match_data(&client->dev);
  	else
  		data->type = id->driver_data;

  	mutex_init(&data->update_lock);

  	/* Fill in the chip specific driver values */
  	switch (data->type) {
  	case adm1027:
  	case adt7463:

  	case adt7468:

  	case emc6d100:
  	case emc6d102:

  	case emc6d103:

  	case emc6d103s:

  		data->freq_map = adm1027_freq_map;

  		data->freq_map_size = ARRAY_SIZE(adm1027_freq_map);

  		break;

  	case lm96000:
  		data->freq_map = lm96000_freq_map;
  		data->freq_map_size = ARRAY_SIZE(lm96000_freq_map);
  		break;

  	default:
  		data->freq_map = lm85_freq_map;

  		data->freq_map_size = ARRAY_SIZE(lm85_freq_map);

  	}

  
  	/* Set the VRM version */

  	data->vrm = vid_which_vrm();

  
  	/* Initialize the LM85 chip */

  	lm85_init_client(client);

  	/* sysfs hooks */
  	data->groups[idx++] = &lm85_group;

  	/* minctl and temp_off exist on all chips except emc6d103s */
  	if (data->type != emc6d103s) {

  		data->groups[idx++] = &lm85_group_minctl;
  		data->groups[idx++] = &lm85_group_temp_off;

  	}

  	/*
  	 * The ADT7463/68 have an optional VRM 10 mode where pin 21 is used
  	 * as a sixth digital VID input rather than an analog input.
  	 */

  	if (data->type == adt7463 || data->type == adt7468) {
  		u8 vid = lm85_read_value(client, LM85_REG_VID);
  		if (vid & 0x80)
  			data->has_vid5 = true;
  	}

  	if (!data->has_vid5)
  		data->groups[idx++] = &lm85_group_in4;

  
  	/* The EMC6D100 has 3 additional voltage inputs */

  	if (data->type == emc6d100)
  		data->groups[idx++] = &lm85_group_in567;

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

  }

  static const struct i2c_device_id lm85_id[] = {
  	{ "adm1027", adm1027 },
  	{ "adt7463", adt7463 },
  	{ "adt7468", adt7468 },
  	{ "lm85", lm85 },
  	{ "lm85b", lm85 },
  	{ "lm85c", lm85 },

  	{ "lm96000", lm96000 },

  	{ "emc6d100", emc6d100 },
  	{ "emc6d101", emc6d100 },
  	{ "emc6d102", emc6d102 },
  	{ "emc6d103", emc6d103 },
  	{ "emc6d103s", emc6d103s },
  	{ }
  };
  MODULE_DEVICE_TABLE(i2c, lm85_id);

  static const struct of_device_id __maybe_unused lm85_of_match[] = {

  	{
  		.compatible = "adi,adm1027",
  		.data = (void *)adm1027
  	},
  	{
  		.compatible = "adi,adt7463",
  		.data = (void *)adt7463
  	},
  	{
  		.compatible = "adi,adt7468",
  		.data = (void *)adt7468
  	},
  	{
  		.compatible = "national,lm85",
  		.data = (void *)lm85
  	},
  	{
  		.compatible = "national,lm85b",
  		.data = (void *)lm85
  	},
  	{
  		.compatible = "national,lm85c",
  		.data = (void *)lm85
  	},
  	{

  		.compatible = "ti,lm96000",
  		.data = (void *)lm96000
  	},
  	{

  		.compatible = "smsc,emc6d100",
  		.data = (void *)emc6d100
  	},
  	{
  		.compatible = "smsc,emc6d101",
  		.data = (void *)emc6d100
  	},
  	{
  		.compatible = "smsc,emc6d102",
  		.data = (void *)emc6d102
  	},
  	{
  		.compatible = "smsc,emc6d103",
  		.data = (void *)emc6d103
  	},
  	{
  		.compatible = "smsc,emc6d103s",
  		.data = (void *)emc6d103s
  	},
  	{ },
  };
  MODULE_DEVICE_TABLE(of, lm85_of_match);

  static struct i2c_driver lm85_driver = {
  	.class		= I2C_CLASS_HWMON,
  	.driver = {
  		.name   = "lm85",

  		.of_match_table = of_match_ptr(lm85_of_match),

  	},
  	.probe		= lm85_probe,

  	.id_table	= lm85_id,
  	.detect		= lm85_detect,
  	.address_list	= normal_i2c,
  };

  module_i2c_driver(lm85_driver);

  MODULE_LICENSE("GPL");

  MODULE_AUTHOR("Philip Pokorny <ppokorny@penguincomputing.com>, "
  	"Margit Schubert-While <margitsw@t-online.de>, "

  	"Justin Thiessen <jthiessen@penguincomputing.com>");

  MODULE_DESCRIPTION("LM85-B, LM85-C driver");