Quelle adt7462.c

Sprache: C

// 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\n");

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

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

return sprintf(buf, "%d\n", 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\n", 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\n", 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\n", 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\n", 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\n", 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\n");
else
  return sprintf(buf, "0\n");
}

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\n");

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

return sprintf(buf, "%d\n",
         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\n", (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\n", 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\n", 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\n", 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\n", 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\n", 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\n", 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\n");
case 7: /* manual */
  return sprintf(buf, "1\n");
default: /* automatic */
  return sprintf(buf, "2\n");
}
}

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\n", (1 << channel));
case 5: /* temp1 & temp4  */
  return sprintf(buf, "9\n");
case 6:
  return sprintf(buf, "15\n");
default:
  return sprintf(buf, "0\n");
}
}

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;

strscpy(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\n", 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" },
{ }
};
MODULE_DEVICE_TABLE(i2c, adt7462_id);

static struct i2c_driver adt7462_driver = {
.class  = I2C_CLASS_HWMON,
.driver = {
  .name = "adt7462",
},
.probe  = 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");

Messung V0.5 in Prozent

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Die farbliche Syntaxdarstellung und die Messung sind noch experimentell.