// 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");