// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  pc87360.c - Part of lm_sensors, Linux kernel modules
 *              for hardware monitoring
 *  Copyright (C) 2004, 2007 Jean Delvare <jdelvare@suse.de>
 *
 *  Copied from smsc47m1.c:
 *  Copyright (C) 2002 Mark D. Studebaker <mdsxyz123@yahoo.com>
 *
 *  Supports the following chips:
 *
 *  Chip        #vin    #fan    #pwm    #temp   devid
 *  PC87360     -       2       2       -       0xE1
 *  PC87363     -       2       2       -       0xE8
 *  PC87364     -       3       3       -       0xE4
 *  PC87365     11      3       3       2       0xE5
 *  PC87366     11      3       3       3-4     0xE9
 *
 *  This driver assumes that no more than one chip is present, and one of
 *  the standard Super-I/O addresses is used (0x2E/0x2F or 0x4E/0x4F).
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/platform_device.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/hwmon-vid.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/acpi.h>
#include <linux/io.h>

#define DRIVER_NAME "pc87360"

/* (temp & vin) channel conversion status register flags (pdf sec.11.5.12) */
#define CHAN_CNVRTD     0x80    /* new data ready */
#define CHAN_ENA        0x01    /* enabled channel (temp or vin) */
#define CHAN_ALM_ENA    0x10    /* propagate to alarms-reg ?? (chk val!) */
#define CHAN_READY      (CHAN_ENA|CHAN_CNVRTD) /* sample ready mask */

#define TEMP_OTS_OE     0x20    /* OTS Output Enable */
#define VIN_RW1C_MASK   (CHAN_READY|CHAN_ALM_MAX|CHAN_ALM_MIN)   /* 0x87 */
#define TEMP_RW1C_MASK  (VIN_RW1C_MASK|TEMP_ALM_CRIT|TEMP_FAULT) /* 0xCF */

static u8 devid;
static struct platform_device *pdev;
static unsigned short extra_isa[3];
static u8 confreg[4];

static int init = 1;
module_param(init, int, 0);
MODULE_PARM_DESC(init,
"Chip initialization level:\n"
" 0: None\n"
"*1: Forcibly enable internal voltage and temperature channels, except in9\n"
" 2: Forcibly enable all voltage and temperature channels, except in9\n"
" 3: Forcibly enable all voltage and temperature channels, including in9");

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

/*
 * Super-I/O registers and operations
 */

#define DEV     0x07    /* Register: Logical device select */
#define DEVID   0x20    /* Register: Device ID */
#define ACT     0x30    /* Register: Device activation */
#define BASE    0x60    /* Register: Base address */

#define FSCM    0x09    /* Logical device: fans */
#define VLM     0x0d    /* Logical device: voltages */
#define TMS     0x0e    /* Logical device: temperatures */
#define LDNI_MAX 3
static const u8 logdev[LDNI_MAX] = { FSCM, VLM, TMS };

#define LD_FAN          0
#define LD_IN           1
#define LD_TEMP         2

static inline void superio_outb(int sioaddr, int reg, int val)
{
        outb(reg, sioaddr);
        outb(val, sioaddr + 1);
}

static inline int superio_inb(int sioaddr, int reg)
{
        outb(reg, sioaddr);
        return inb(sioaddr + 1);
}

static inline void superio_exit(int sioaddr)
{
        outb(0x02, sioaddr);
        outb(0x02, sioaddr + 1);
}

/*
 * Logical devices
 */

#define PC87360_EXTENT          0x10
#define PC87365_REG_BANK        0x09
#define NO_BANK                 0xff

/*
 * Fan registers and conversions
 */

/* nr has to be 0 or 1 (PC87360/87363) or 2 (PC87364/87365/87366) */
#define PC87360_REG_PRESCALE(nr)        (0x00 + 2 * (nr))
#define PC87360_REG_PWM(nr)             (0x01 + 2 * (nr))
#define PC87360_REG_FAN_MIN(nr)         (0x06 + 3 * (nr))
#define PC87360_REG_FAN(nr)             (0x07 + 3 * (nr))
#define PC87360_REG_FAN_STATUS(nr)      (0x08 + 3 * (nr))

#define FAN_FROM_REG(val, div)          ((val) == 0 ? 0 : \
                                         480000 / ((val) * (div)))
#define FAN_TO_REG(val, div)            ((val) <= 100 ? 0 : \
                                         480000 / ((val) * (div)))
#define FAN_DIV_FROM_REG(val)           (1 << (((val) >> 5) & 0x03))
#define FAN_STATUS_FROM_REG(val)        ((val) & 0x07)

#define FAN_CONFIG_MONITOR(val, nr)     (((val) >> (2 + (nr) * 3)) & 1)
#define FAN_CONFIG_CONTROL(val, nr)     (((val) >> (3 + (nr) * 3)) & 1)
#define FAN_CONFIG_INVERT(val, nr)      (((val) >> (4 + (nr) * 3)) & 1)

#define PWM_FROM_REG(val, inv)          ((inv) ? 255 - (val) : (val))
static inline u8 PWM_TO_REG(int val, int inv)
{
        if (inv)
                val = 255 - val;
        if (val < 0)
                return 0;
        if (val > 255)
                return 255;
        return val;
}

/*
 * Voltage registers and conversions
 */

#define PC87365_REG_IN_CONVRATE         0x07
#define PC87365_REG_IN_CONFIG           0x08
#define PC87365_REG_IN                  0x0B
#define PC87365_REG_IN_MIN              0x0D
#define PC87365_REG_IN_MAX              0x0C
#define PC87365_REG_IN_STATUS           0x0A
#define PC87365_REG_IN_ALARMS1          0x00
#define PC87365_REG_IN_ALARMS2          0x01
#define PC87365_REG_VID                 0x06

#define IN_FROM_REG(val, ref)           (((val) * (ref) + 128) / 256)
#define IN_TO_REG(val, ref)             ((val) < 0 ? 0 : \
                                         (val) * 256 >= (ref) * 255 ? 255 : \
                                         ((val) * 256 + (ref) / 2) / (ref))

/*
 * Temperature registers and conversions
 */

#define PC87365_REG_TEMP_CONFIG         0x08
#define PC87365_REG_TEMP                0x0B
#define PC87365_REG_TEMP_MIN            0x0D
#define PC87365_REG_TEMP_MAX            0x0C
#define PC87365_REG_TEMP_CRIT           0x0E
#define PC87365_REG_TEMP_STATUS         0x0A
#define PC87365_REG_TEMP_ALARMS         0x00

#define TEMP_FROM_REG(val)              ((val) * 1000)
#define TEMP_TO_REG(val)                ((val) < -55000 ? -55 : \
                                         (val) > 127000 ? 127 : \
                                         (val) < 0 ? ((val) - 500) / 1000 : \
                                         ((val) + 500) / 1000)

/*
 * Device data
 */

struct pc87360_data {
        const char *name;
        struct device *hwmon_dev;
        struct mutex lock;
        struct mutex update_lock;
        bool valid;             /* true if following fields are valid */
        unsigned long last_updated;     /* In jiffies */

        int address[3];

        u8 fannr, innr, tempnr;

        u8 fan[3];              /* Register value */
        u8 fan_min[3];          /* Register value */
        u8 fan_status[3];       /* Register value */
        u8 pwm[3];              /* Register value */
        u16 fan_conf;           /* Configuration register values, combined */

        u16 in_vref;            /* 1 mV/bit */
        u8 in[14];              /* Register value */
        u8 in_min[14];          /* Register value */
        u8 in_max[14];          /* Register value */
        u8 in_crit[3];          /* Register value */
        u8 in_status[14];       /* Register value */
        u16 in_alarms;          /* Register values, combined, masked */
        u8 vid_conf;            /* Configuration register value */
        u8 vrm;
        u8 vid;                 /* Register value */

        s8 temp[3];             /* Register value */
        s8 temp_min[3];         /* Register value */
        s8 temp_max[3];         /* Register value */
        s8 temp_crit[3];        /* Register value */
        u8 temp_status[3];      /* Register value */
        u8 temp_alarms;         /* Register value, masked */
};

/*
 * ldi is the logical device index
 * bank is for voltages and temperatures only
 */
static int pc87360_read_value(struct pc87360_data *data, u8 ldi, u8 bank,
                              u8 reg)
{
        int res;

        mutex_lock(&(data->lock));
        if (bank != NO_BANK)
                outb_p(bank, data->address[ldi] + PC87365_REG_BANK);
        res = inb_p(data->address[ldi] + reg);
        mutex_unlock(&(data->lock));

        return res;
}

static void pc87360_write_value(struct pc87360_data *data, u8 ldi, u8 bank,
                                u8 reg, u8 value)
{
        mutex_lock(&(data->lock));
        if (bank != NO_BANK)
                outb_p(bank, data->address[ldi] + PC87365_REG_BANK);
        outb_p(value, data->address[ldi] + reg);
        mutex_unlock(&(data->lock));
}

static void pc87360_autodiv(struct device *dev, int nr)
{
        struct pc87360_data *data = dev_get_drvdata(dev);
        u8 old_min = data->fan_min[nr];

        /* Increase clock divider if needed and possible */
        if ((data->fan_status[nr] & 0x04) /* overflow flag */
         || (data->fan[nr] >= 224)) { /* next to overflow */
                if ((data->fan_status[nr] & 0x60) != 0x60) {
                        data->fan_status[nr] += 0x20;
                        data->fan_min[nr] >>= 1;
                        data->fan[nr] >>= 1;
                        dev_dbg(dev,
                                "Increasing clock divider to %d for fan %d\n",
                                FAN_DIV_FROM_REG(data->fan_status[nr]), nr + 1);
                }
        } else {
                /* Decrease clock divider if possible */
                while (!(data->fan_min[nr] & 0x80) /* min "nails" divider */
                 && data->fan[nr] < 85 /* bad accuracy */
                 && (data->fan_status[nr] & 0x60) != 0x00) {
                        data->fan_status[nr] -= 0x20;
                        data->fan_min[nr] <<= 1;
                        data->fan[nr] <<= 1;
                        dev_dbg(dev,
                                "Decreasing clock divider to %d for fan %d\n",
                                FAN_DIV_FROM_REG(data->fan_status[nr]),
                                nr + 1);
                }
        }

        /* Write new fan min if it changed */
        if (old_min != data->fan_min[nr]) {
                pc87360_write_value(data, LD_FAN, NO_BANK,
                                    PC87360_REG_FAN_MIN(nr),
                                    data->fan_min[nr]);
        }
}

static struct pc87360_data *pc87360_update_device(struct device *dev)
{
        struct pc87360_data *data = dev_get_drvdata(dev);
        u8 i;

        mutex_lock(&data->update_lock);

        if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) {
                dev_dbg(dev, "Data update\n");

                /* Fans */
                for (i = 0; i < data->fannr; i++) {
                        if (FAN_CONFIG_MONITOR(data->fan_conf, i)) {
                                data->fan_status[i] =
                                        pc87360_read_value(data, LD_FAN,
                                        NO_BANK, PC87360_REG_FAN_STATUS(i));
                                data->fan[i] = pc87360_read_value(data, LD_FAN,
                                               NO_BANK, PC87360_REG_FAN(i));
                                data->fan_min[i] = pc87360_read_value(data,
                                                   LD_FAN, NO_BANK,
                                                   PC87360_REG_FAN_MIN(i));
                                /* Change clock divider if needed */
                                pc87360_autodiv(dev, i);
                                /* Clear bits and write new divider */
                                pc87360_write_value(data, LD_FAN, NO_BANK,
                                                    PC87360_REG_FAN_STATUS(i),
                                                    data->fan_status[i]);
                        }
                        if (FAN_CONFIG_CONTROL(data->fan_conf, i))
                                data->pwm[i] = pc87360_read_value(data, LD_FAN,
                                               NO_BANK, PC87360_REG_PWM(i));
                }

                /* Voltages */
                /*
                 * The min() below does not have any practical meaning and is
                 * only needed to silence a warning observed with gcc 12+.
                 */
                for (i = 0; i < min(data->innr, ARRAY_SIZE(data->in)); i++) {
                        data->in_status[i] = pc87360_read_value(data, LD_IN, i,
                                             PC87365_REG_IN_STATUS);
                        /* Clear bits */
                        pc87360_write_value(data, LD_IN, i,
                                            PC87365_REG_IN_STATUS,
                                            data->in_status[i]);
                        if ((data->in_status[i] & CHAN_READY) == CHAN_READY) {
                                data->in[i] = pc87360_read_value(data, LD_IN,
                                              i, PC87365_REG_IN);
                        }
                        if (data->in_status[i] & CHAN_ENA) {
                                data->in_min[i] = pc87360_read_value(data,
                                                  LD_IN, i,
                                                  PC87365_REG_IN_MIN);
                                data->in_max[i] = pc87360_read_value(data,
                                                  LD_IN, i,
                                                  PC87365_REG_IN_MAX);
                                if (i >= 11)
                                        data->in_crit[i-11] =
                                                pc87360_read_value(data, LD_IN,
                                                i, PC87365_REG_TEMP_CRIT);
                        }
                }
                if (data->innr) {
                        data->in_alarms = pc87360_read_value(data, LD_IN,
                                          NO_BANK, PC87365_REG_IN_ALARMS1)
                                        | ((pc87360_read_value(data, LD_IN,
                                            NO_BANK, PC87365_REG_IN_ALARMS2)
                                            & 0x07) << 8);
                        data->vid = (data->vid_conf & 0xE0) ?
                                    pc87360_read_value(data, LD_IN,
                                    NO_BANK, PC87365_REG_VID) : 0x1F;
                }

                /* Temperatures */
                for (i = 0; i < data->tempnr; i++) {
                        data->temp_status[i] = pc87360_read_value(data,
                                               LD_TEMP, i,
                                               PC87365_REG_TEMP_STATUS);
                        /* Clear bits */
                        pc87360_write_value(data, LD_TEMP, i,
                                            PC87365_REG_TEMP_STATUS,
                                            data->temp_status[i]);
                        if ((data->temp_status[i] & CHAN_READY) == CHAN_READY) {
                                data->temp[i] = pc87360_read_value(data,
                                                LD_TEMP, i,
                                                PC87365_REG_TEMP);
                        }
                        if (data->temp_status[i] & CHAN_ENA) {
                                data->temp_min[i] = pc87360_read_value(data,
                                                    LD_TEMP, i,
                                                    PC87365_REG_TEMP_MIN);
                                data->temp_max[i] = pc87360_read_value(data,
                                                    LD_TEMP, i,
                                                    PC87365_REG_TEMP_MAX);
                                data->temp_crit[i] = pc87360_read_value(data,
                                                     LD_TEMP, i,
                                                     PC87365_REG_TEMP_CRIT);
                        }
                }
                if (data->tempnr) {
                        data->temp_alarms = pc87360_read_value(data, LD_TEMP,
                                            NO_BANK, PC87365_REG_TEMP_ALARMS)
                                            & 0x3F;
                }

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

        mutex_unlock(&data->update_lock);

        return data;
}

static ssize_t in_input_show(struct device *dev,
                             struct device_attribute *devattr, char *buf)
{
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
        struct pc87360_data *data = pc87360_update_device(dev);
        return sprintf(buf, "%u\n", IN_FROM_REG(data->in[attr->index],
                       data->in_vref));
}

static struct sensor_device_attribute in_input[] = {
        SENSOR_ATTR_RO(in0_input, in_input, 0),
        SENSOR_ATTR_RO(in1_input, in_input, 1),
        SENSOR_ATTR_RO(in2_input, in_input, 2),
        SENSOR_ATTR_RO(in3_input, in_input, 3),
        SENSOR_ATTR_RO(in4_input, in_input, 4),
        SENSOR_ATTR_RO(in5_input, in_input, 5),
        SENSOR_ATTR_RO(in6_input, in_input, 6),
        SENSOR_ATTR_RO(in7_input, in_input, 7),
        SENSOR_ATTR_RO(in8_input, in_input, 8),
        SENSOR_ATTR_RO(in9_input, in_input, 9),
        SENSOR_ATTR_RO(in10_input, in_input, 10),
};

static ssize_t in_status_show(struct device *dev,
                              struct device_attribute *devattr, char *buf)
{
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
        struct pc87360_data *data = pc87360_update_device(dev);
        return sprintf(buf, "%u\n", data->in_status[attr->index]);
}

static struct sensor_device_attribute in_status[] = {
        SENSOR_ATTR_RO(in0_status, in_status, 0),
        SENSOR_ATTR_RO(in1_status, in_status, 1),
        SENSOR_ATTR_RO(in2_status, in_status, 2),
        SENSOR_ATTR_RO(in3_status, in_status, 3),
        SENSOR_ATTR_RO(in4_status, in_status, 4),
        SENSOR_ATTR_RO(in5_status, in_status, 5),
        SENSOR_ATTR_RO(in6_status, in_status, 6),
        SENSOR_ATTR_RO(in7_status, in_status, 7),
        SENSOR_ATTR_RO(in8_status, in_status, 8),
        SENSOR_ATTR_RO(in9_status, in_status, 9),
        SENSOR_ATTR_RO(in10_status, in_status, 10),
};

static ssize_t in_min_show(struct device *dev,
                           struct device_attribute *devattr, char *buf)
{
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
        struct pc87360_data *data = pc87360_update_device(dev);
        return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[attr->index],
                       data->in_vref));
}

static ssize_t in_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 pc87360_data *data = dev_get_drvdata(dev);
        long val;
        int err;

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

        mutex_lock(&data->update_lock);
        data->in_min[attr->index] = IN_TO_REG(val, data->in_vref);
        pc87360_write_value(data, LD_IN, attr->index, PC87365_REG_IN_MIN,
                            data->in_min[attr->index]);
        mutex_unlock(&data->update_lock);
        return count;
}

static struct sensor_device_attribute in_min[] = {
        SENSOR_ATTR_RW(in0_min, in_min, 0),
        SENSOR_ATTR_RW(in1_min, in_min, 1),
        SENSOR_ATTR_RW(in2_min, in_min, 2),
        SENSOR_ATTR_RW(in3_min, in_min, 3),
        SENSOR_ATTR_RW(in4_min, in_min, 4),
        SENSOR_ATTR_RW(in5_min, in_min, 5),
        SENSOR_ATTR_RW(in6_min, in_min, 6),
        SENSOR_ATTR_RW(in7_min, in_min, 7),
        SENSOR_ATTR_RW(in8_min, in_min, 8),
        SENSOR_ATTR_RW(in9_min, in_min, 9),
        SENSOR_ATTR_RW(in10_min, in_min, 10),
};

static ssize_t in_max_show(struct device *dev,
                           struct device_attribute *devattr, char *buf)
{
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
        struct pc87360_data *data = pc87360_update_device(dev);
        return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[attr->index],
                       data->in_vref));
}

static ssize_t in_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 pc87360_data *data = dev_get_drvdata(dev);
        long val;
        int err;

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

        mutex_lock(&data->update_lock);
        data->in_max[attr->index] = IN_TO_REG(val,
                               data->in_vref);
        pc87360_write_value(data, LD_IN, attr->index, PC87365_REG_IN_MAX,
                            data->in_max[attr->index]);
        mutex_unlock(&data->update_lock);
        return count;
}

static struct sensor_device_attribute in_max[] = {
        SENSOR_ATTR_RW(in0_max, in_max, 0),
        SENSOR_ATTR_RW(in1_max, in_max, 1),
        SENSOR_ATTR_RW(in2_max, in_max, 2),
        SENSOR_ATTR_RW(in3_max, in_max, 3),
        SENSOR_ATTR_RW(in4_max, in_max, 4),
        SENSOR_ATTR_RW(in5_max, in_max, 5),
        SENSOR_ATTR_RW(in6_max, in_max, 6),
        SENSOR_ATTR_RW(in7_max, in_max, 7),
        SENSOR_ATTR_RW(in8_max, in_max, 8),
        SENSOR_ATTR_RW(in9_max, in_max, 9),
        SENSOR_ATTR_RW(in10_max, in_max, 10),
};

/* (temp & vin) channel status register alarm bits (pdf sec.11.5.12) */
#define CHAN_ALM_MIN    0x02    /* min limit crossed */
#define CHAN_ALM_MAX    0x04    /* max limit exceeded */
#define TEMP_ALM_CRIT   0x08    /* temp crit exceeded (temp only) */

/*
 * show_in_min/max_alarm() reads data from the per-channel status
 * register (sec 11.5.12), not the vin event status registers (sec
 * 11.5.2) that (legacy) show_in_alarm() resds (via data->in_alarms)
 */

static ssize_t in_min_alarm_show(struct device *dev,
                                 struct device_attribute *devattr, char *buf)
{
        struct pc87360_data *data = pc87360_update_device(dev);
        unsigned nr = to_sensor_dev_attr(devattr)->index;

        return sprintf(buf, "%u\n", !!(data->in_status[nr] & CHAN_ALM_MIN));
}

static struct sensor_device_attribute in_min_alarm[] = {
        SENSOR_ATTR_RO(in0_min_alarm, in_min_alarm, 0),
        SENSOR_ATTR_RO(in1_min_alarm, in_min_alarm, 1),
        SENSOR_ATTR_RO(in2_min_alarm, in_min_alarm, 2),
        SENSOR_ATTR_RO(in3_min_alarm, in_min_alarm, 3),
        SENSOR_ATTR_RO(in4_min_alarm, in_min_alarm, 4),
        SENSOR_ATTR_RO(in5_min_alarm, in_min_alarm, 5),
        SENSOR_ATTR_RO(in6_min_alarm, in_min_alarm, 6),
        SENSOR_ATTR_RO(in7_min_alarm, in_min_alarm, 7),
        SENSOR_ATTR_RO(in8_min_alarm, in_min_alarm, 8),
        SENSOR_ATTR_RO(in9_min_alarm, in_min_alarm, 9),
        SENSOR_ATTR_RO(in10_min_alarm, in_min_alarm, 10),
};

static ssize_t in_max_alarm_show(struct device *dev,
                                 struct device_attribute *devattr, char *buf)
{
        struct pc87360_data *data = pc87360_update_device(dev);
        unsigned nr = to_sensor_dev_attr(devattr)->index;

        return sprintf(buf, "%u\n", !!(data->in_status[nr] & CHAN_ALM_MAX));
}

static struct sensor_device_attribute in_max_alarm[] = {
        SENSOR_ATTR_RO(in0_max_alarm, in_max_alarm, 0),
        SENSOR_ATTR_RO(in1_max_alarm, in_max_alarm, 1),
        SENSOR_ATTR_RO(in2_max_alarm, in_max_alarm, 2),
        SENSOR_ATTR_RO(in3_max_alarm, in_max_alarm, 3),
        SENSOR_ATTR_RO(in4_max_alarm, in_max_alarm, 4),
        SENSOR_ATTR_RO(in5_max_alarm, in_max_alarm, 5),
        SENSOR_ATTR_RO(in6_max_alarm, in_max_alarm, 6),
        SENSOR_ATTR_RO(in7_max_alarm, in_max_alarm, 7),
        SENSOR_ATTR_RO(in8_max_alarm, in_max_alarm, 8),
        SENSOR_ATTR_RO(in9_max_alarm, in_max_alarm, 9),
        SENSOR_ATTR_RO(in10_max_alarm, in_max_alarm, 10),
};

#define VIN_UNIT_ATTRS(X) \
        &in_input[X].dev_attr.attr,     \
        &in_status[X].dev_attr.attr,    \
        &in_min[X].dev_attr.attr,       \
        &in_max[X].dev_attr.attr,       \
        &in_min_alarm[X].dev_attr.attr, \
        &in_max_alarm[X].dev_attr.attr

static ssize_t cpu0_vid_show(struct device *dev,
                             struct device_attribute *attr, char *buf)
{
        struct pc87360_data *data = pc87360_update_device(dev);
        return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
}
static DEVICE_ATTR_RO(cpu0_vid);

static ssize_t vrm_show(struct device *dev, struct device_attribute *attr,
                        char *buf)
{
        struct pc87360_data *data = dev_get_drvdata(dev);
        return sprintf(buf, "%u\n", data->vrm);
}

static ssize_t vrm_store(struct device *dev, struct device_attribute *attr,
                         const char *buf, size_t count)
{
        struct pc87360_data *data = dev_get_drvdata(dev);
        unsigned long val;
        int err;

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

        if (val > 255)
                return -EINVAL;

        data->vrm = val;
        return count;
}
static DEVICE_ATTR_RW(vrm);

static ssize_t alarms_in_show(struct device *dev,
                              struct device_attribute *attr, char *buf)
{
        struct pc87360_data *data = pc87360_update_device(dev);
        return sprintf(buf, "%u\n", data->in_alarms);
}
static DEVICE_ATTR_RO(alarms_in);

static struct attribute *pc8736x_vin_attr_array[] = {
        VIN_UNIT_ATTRS(0),
        VIN_UNIT_ATTRS(1),
        VIN_UNIT_ATTRS(2),
        VIN_UNIT_ATTRS(3),
        VIN_UNIT_ATTRS(4),
        VIN_UNIT_ATTRS(5),
        VIN_UNIT_ATTRS(6),
        VIN_UNIT_ATTRS(7),
        VIN_UNIT_ATTRS(8),
        VIN_UNIT_ATTRS(9),
        VIN_UNIT_ATTRS(10),
        &dev_attr_cpu0_vid.attr,
        &dev_attr_vrm.attr,
        &dev_attr_alarms_in.attr,
        NULL
};
static const struct attribute_group pc8736x_vin_group = {
        .attrs = pc8736x_vin_attr_array,
};

static ssize_t therm_input_show(struct device *dev,
                                struct device_attribute *devattr, char *buf)
{
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
        struct pc87360_data *data = pc87360_update_device(dev);
        return sprintf(buf, "%u\n", IN_FROM_REG(data->in[attr->index],
                       data->in_vref));
}

/*
 * the +11 term below reflects the fact that VLM units 11,12,13 are
 * used in the chip to measure voltage across the thermistors
 */
static struct sensor_device_attribute therm_input[] = {
        SENSOR_ATTR_RO(temp4_input, therm_input, 0 + 11),
        SENSOR_ATTR_RO(temp5_input, therm_input, 1 + 11),
        SENSOR_ATTR_RO(temp6_input, therm_input, 2 + 11),
};

static ssize_t therm_status_show(struct device *dev,
                                 struct device_attribute *devattr, char *buf)
{
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
        struct pc87360_data *data = pc87360_update_device(dev);
        return sprintf(buf, "%u\n", data->in_status[attr->index]);
}

static struct sensor_device_attribute therm_status[] = {
        SENSOR_ATTR_RO(temp4_status, therm_status, 0 + 11),
        SENSOR_ATTR_RO(temp5_status, therm_status, 1 + 11),
        SENSOR_ATTR_RO(temp6_status, therm_status, 2 + 11),
};

static ssize_t therm_min_show(struct device *dev,
                              struct device_attribute *devattr, char *buf)
{
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
        struct pc87360_data *data = pc87360_update_device(dev);
        return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[attr->index],
                       data->in_vref));
}

static ssize_t therm_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 pc87360_data *data = dev_get_drvdata(dev);
        long val;
        int err;

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

        mutex_lock(&data->update_lock);
        data->in_min[attr->index] = IN_TO_REG(val, data->in_vref);
        pc87360_write_value(data, LD_IN, attr->index, PC87365_REG_TEMP_MIN,
                            data->in_min[attr->index]);
        mutex_unlock(&data->update_lock);
        return count;
}

static struct sensor_device_attribute therm_min[] = {
        SENSOR_ATTR_RW(temp4_min, therm_min, 0 + 11),
        SENSOR_ATTR_RW(temp5_min, therm_min, 1 + 11),
        SENSOR_ATTR_RW(temp6_min, therm_min, 2 + 11),
};

static ssize_t therm_max_show(struct device *dev,
                              struct device_attribute *devattr, char *buf)
{
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
        struct pc87360_data *data = pc87360_update_device(dev);
        return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[attr->index],
                       data->in_vref));
}

static ssize_t therm_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 pc87360_data *data = dev_get_drvdata(dev);
        long val;
        int err;

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

        mutex_lock(&data->update_lock);
        data->in_max[attr->index] = IN_TO_REG(val, data->in_vref);
        pc87360_write_value(data, LD_IN, attr->index, PC87365_REG_TEMP_MAX,
                            data->in_max[attr->index]);
        mutex_unlock(&data->update_lock);
        return count;
}

static struct sensor_device_attribute therm_max[] = {
        SENSOR_ATTR_RW(temp4_max, therm_max, 0 + 11),
        SENSOR_ATTR_RW(temp5_max, therm_max, 1 + 11),
        SENSOR_ATTR_RW(temp6_max, therm_max, 2 + 11),
};

static ssize_t therm_crit_show(struct device *dev,
                               struct device_attribute *devattr, char *buf)
{
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
        struct pc87360_data *data = pc87360_update_device(dev);
        return sprintf(buf, "%u\n", IN_FROM_REG(data->in_crit[attr->index-11],
                       data->in_vref));
}

static ssize_t therm_crit_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 pc87360_data *data = dev_get_drvdata(dev);
        long val;
        int err;

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

        mutex_lock(&data->update_lock);
        data->in_crit[attr->index-11] = IN_TO_REG(val, data->in_vref);
        pc87360_write_value(data, LD_IN, attr->index, PC87365_REG_TEMP_CRIT,
                            data->in_crit[attr->index-11]);
        mutex_unlock(&data->update_lock);
        return count;
}

static struct sensor_device_attribute therm_crit[] = {
        SENSOR_ATTR_RW(temp4_crit, therm_crit, 0 + 11),
        SENSOR_ATTR_RW(temp5_crit, therm_crit, 1 + 11),
        SENSOR_ATTR_RW(temp6_crit, therm_crit, 2 + 11),
};

/*
 * show_therm_min/max_alarm() reads data from the per-channel voltage
 * status register (sec 11.5.12)
 */
static ssize_t therm_min_alarm_show(struct device *dev,
                                    struct device_attribute *devattr,
                                    char *buf)
{
        struct pc87360_data *data = pc87360_update_device(dev);
        unsigned nr = to_sensor_dev_attr(devattr)->index;

        return sprintf(buf, "%u\n", !!(data->in_status[nr] & CHAN_ALM_MIN));
}

static struct sensor_device_attribute therm_min_alarm[] = {
        SENSOR_ATTR_RO(temp4_min_alarm, therm_min_alarm, 0 + 11),
        SENSOR_ATTR_RO(temp5_min_alarm, therm_min_alarm, 1 + 11),
        SENSOR_ATTR_RO(temp6_min_alarm, therm_min_alarm, 2 + 11),
};

static ssize_t therm_max_alarm_show(struct device *dev,
                                    struct device_attribute *devattr,
                                    char *buf)
{
        struct pc87360_data *data = pc87360_update_device(dev);
        unsigned nr = to_sensor_dev_attr(devattr)->index;

        return sprintf(buf, "%u\n", !!(data->in_status[nr] & CHAN_ALM_MAX));
}

static struct sensor_device_attribute therm_max_alarm[] = {
        SENSOR_ATTR_RO(temp4_max_alarm, therm_max_alarm, 0 + 11),
        SENSOR_ATTR_RO(temp5_max_alarm, therm_max_alarm, 1 + 11),
        SENSOR_ATTR_RO(temp6_max_alarm, therm_max_alarm, 2 + 11),
};

static ssize_t therm_crit_alarm_show(struct device *dev,
                                     struct device_attribute *devattr,
                                     char *buf)
{
        struct pc87360_data *data = pc87360_update_device(dev);
        unsigned nr = to_sensor_dev_attr(devattr)->index;

        return sprintf(buf, "%u\n", !!(data->in_status[nr] & TEMP_ALM_CRIT));
}

static struct sensor_device_attribute therm_crit_alarm[] = {
        SENSOR_ATTR_RO(temp4_crit_alarm, therm_crit_alarm, 0 + 11),
        SENSOR_ATTR_RO(temp5_crit_alarm, therm_crit_alarm, 1 + 11),
        SENSOR_ATTR_RO(temp6_crit_alarm, therm_crit_alarm, 2 + 11),
};

#define THERM_UNIT_ATTRS(X) \
        &therm_input[X].dev_attr.attr,  \
        &therm_status[X].dev_attr.attr, \
        &therm_min[X].dev_attr.attr,    \
        &therm_max[X].dev_attr.attr,    \
        &therm_crit[X].dev_attr.attr,   \
        &therm_min_alarm[X].dev_attr.attr, \
        &therm_max_alarm[X].dev_attr.attr, \
        &therm_crit_alarm[X].dev_attr.attr

static struct attribute *pc8736x_therm_attr_array[] = {
        THERM_UNIT_ATTRS(0),
        THERM_UNIT_ATTRS(1),
        THERM_UNIT_ATTRS(2),
        NULL
};
static const struct attribute_group pc8736x_therm_group = {
        .attrs = pc8736x_therm_attr_array,
};

static ssize_t temp_input_show(struct device *dev,
                               struct device_attribute *devattr, char *buf)
{
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
        struct pc87360_data *data = pc87360_update_device(dev);
        return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[attr->index]));
}

static struct sensor_device_attribute temp_input[] = {
        SENSOR_ATTR_RO(temp1_input, temp_input, 0),
        SENSOR_ATTR_RO(temp2_input, temp_input, 1),
        SENSOR_ATTR_RO(temp3_input, temp_input, 2),
};

static ssize_t temp_status_show(struct device *dev,
                                struct device_attribute *devattr, char *buf)
{
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
        struct pc87360_data *data = pc87360_update_device(dev);
        return sprintf(buf, "%d\n", data->temp_status[attr->index]);
}

static struct sensor_device_attribute temp_status[] = {
        SENSOR_ATTR_RO(temp1_status, temp_status, 0),
        SENSOR_ATTR_RO(temp2_status, temp_status, 1),
        SENSOR_ATTR_RO(temp3_status, temp_status, 2),
};

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 pc87360_data *data = pc87360_update_device(dev);
        return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[attr->index]));
}

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 pc87360_data *data = dev_get_drvdata(dev);
        long val;
        int err;

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

        mutex_lock(&data->update_lock);
        data->temp_min[attr->index] = TEMP_TO_REG(val);
        pc87360_write_value(data, LD_TEMP, attr->index, PC87365_REG_TEMP_MIN,
                            data->temp_min[attr->index]);
        mutex_unlock(&data->update_lock);
        return count;
}

static struct sensor_device_attribute temp_min[] = {
        SENSOR_ATTR_RW(temp1_min, temp_min, 0),
        SENSOR_ATTR_RW(temp2_min, temp_min, 1),
        SENSOR_ATTR_RW(temp3_min, temp_min, 2),
};

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 pc87360_data *data = pc87360_update_device(dev);
        return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[attr->index]));
}

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 pc87360_data *data = dev_get_drvdata(dev);
        long val;
        int err;

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

        mutex_lock(&data->update_lock);
        data->temp_max[attr->index] = TEMP_TO_REG(val);
        pc87360_write_value(data, LD_TEMP, attr->index, PC87365_REG_TEMP_MAX,
                            data->temp_max[attr->index]);
        mutex_unlock(&data->update_lock);
        return count;
}

static struct sensor_device_attribute temp_max[] = {
        SENSOR_ATTR_RW(temp1_max, temp_max, 0),
        SENSOR_ATTR_RW(temp2_max, temp_max, 1),
        SENSOR_ATTR_RW(temp3_max, temp_max, 2),
};

static ssize_t temp_crit_show(struct device *dev,
                              struct device_attribute *devattr, char *buf)
{
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
        struct pc87360_data *data = pc87360_update_device(dev);
        return sprintf(buf, "%d\n",
                       TEMP_FROM_REG(data->temp_crit[attr->index]));
}

static ssize_t temp_crit_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 pc87360_data *data = dev_get_drvdata(dev);
        long val;
        int err;

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

        mutex_lock(&data->update_lock);
        data->temp_crit[attr->index] = TEMP_TO_REG(val);
        pc87360_write_value(data, LD_TEMP, attr->index, PC87365_REG_TEMP_CRIT,
                            data->temp_crit[attr->index]);
        mutex_unlock(&data->update_lock);
        return count;
}

static struct sensor_device_attribute temp_crit[] = {
        SENSOR_ATTR_RW(temp1_crit, temp_crit, 0),
        SENSOR_ATTR_RW(temp2_crit, temp_crit, 1),
        SENSOR_ATTR_RW(temp3_crit, temp_crit, 2),
};

/*
 * temp_min/max_alarm_show() reads data from the per-channel status
 * register (sec 12.3.7), not the temp event status registers (sec
 * 12.3.2) that show_temp_alarm() reads (via data->temp_alarms)
 */
static ssize_t temp_min_alarm_show(struct device *dev,
                                   struct device_attribute *devattr,
                                   char *buf)
{
        struct pc87360_data *data = pc87360_update_device(dev);
        unsigned nr = to_sensor_dev_attr(devattr)->index;

        return sprintf(buf, "%u\n", !!(data->temp_status[nr] & CHAN_ALM_MIN));
}

static struct sensor_device_attribute temp_min_alarm[] = {
        SENSOR_ATTR_RO(temp1_min_alarm, temp_min_alarm, 0),
        SENSOR_ATTR_RO(temp2_min_alarm, temp_min_alarm, 1),
        SENSOR_ATTR_RO(temp3_min_alarm, temp_min_alarm, 2),
};

static ssize_t temp_max_alarm_show(struct device *dev,
                                   struct device_attribute *devattr,
                                   char *buf)
{
        struct pc87360_data *data = pc87360_update_device(dev);
        unsigned nr = to_sensor_dev_attr(devattr)->index;

        return sprintf(buf, "%u\n", !!(data->temp_status[nr] & CHAN_ALM_MAX));
}

static struct sensor_device_attribute temp_max_alarm[] = {
        SENSOR_ATTR_RO(temp1_max_alarm, temp_max_alarm, 0),
        SENSOR_ATTR_RO(temp2_max_alarm, temp_max_alarm, 1),
        SENSOR_ATTR_RO(temp3_max_alarm, temp_max_alarm, 2),
};

static ssize_t temp_crit_alarm_show(struct device *dev,
                                    struct device_attribute *devattr,
                                    char *buf)
{
        struct pc87360_data *data = pc87360_update_device(dev);
        unsigned nr = to_sensor_dev_attr(devattr)->index;

        return sprintf(buf, "%u\n", !!(data->temp_status[nr] & TEMP_ALM_CRIT));
}

static struct sensor_device_attribute temp_crit_alarm[] = {
        SENSOR_ATTR_RO(temp1_crit_alarm, temp_crit_alarm, 0),
        SENSOR_ATTR_RO(temp2_crit_alarm, temp_crit_alarm, 1),
        SENSOR_ATTR_RO(temp3_crit_alarm, temp_crit_alarm, 2),
};

#define TEMP_FAULT      0x40    /* open diode */
static ssize_t temp_fault_show(struct device *dev,
                               struct device_attribute *devattr, char *buf)
{
        struct pc87360_data *data = pc87360_update_device(dev);
        unsigned nr = to_sensor_dev_attr(devattr)->index;

        return sprintf(buf, "%u\n", !!(data->temp_status[nr] & TEMP_FAULT));
}

static struct sensor_device_attribute temp_fault[] = {
        SENSOR_ATTR_RO(temp1_fault, temp_fault, 0),
        SENSOR_ATTR_RO(temp2_fault, temp_fault, 1),
        SENSOR_ATTR_RO(temp3_fault, temp_fault, 2),
};

#define TEMP_UNIT_ATTRS(X)                      \
{       &temp_input[X].dev_attr.attr,           \
        &temp_status[X].dev_attr.attr,          \
        &temp_min[X].dev_attr.attr,             \
        &temp_max[X].dev_attr.attr,             \
        &temp_crit[X].dev_attr.attr,            \
        &temp_min_alarm[X].dev_attr.attr,       \
        &temp_max_alarm[X].dev_attr.attr,       \
        &temp_crit_alarm[X].dev_attr.attr,      \
        &temp_fault[X].dev_attr.attr,           \
        NULL                                    \
}

static struct attribute *pc8736x_temp_attr[][10] = {
        TEMP_UNIT_ATTRS(0),
        TEMP_UNIT_ATTRS(1),
        TEMP_UNIT_ATTRS(2)
};

static const struct attribute_group pc8736x_temp_attr_group[] = {
        { .attrs = pc8736x_temp_attr[0] },
        { .attrs = pc8736x_temp_attr[1] },
        { .attrs = pc8736x_temp_attr[2] }
};

static ssize_t alarms_temp_show(struct device *dev,
                                struct device_attribute *attr, char *buf)
{
        struct pc87360_data *data = pc87360_update_device(dev);
        return sprintf(buf, "%u\n", data->temp_alarms);
}

static DEVICE_ATTR_RO(alarms_temp);

static ssize_t fan_input_show(struct device *dev,
                              struct device_attribute *devattr, char *buf)
{
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
        struct pc87360_data *data = pc87360_update_device(dev);
        return sprintf(buf, "%u\n", FAN_FROM_REG(data->fan[attr->index],
                       FAN_DIV_FROM_REG(data->fan_status[attr->index])));
}

static struct sensor_device_attribute fan_input[] = {
        SENSOR_ATTR_RO(fan1_input, fan_input, 0),
        SENSOR_ATTR_RO(fan2_input, fan_input, 1),
        SENSOR_ATTR_RO(fan3_input, fan_input, 2),
};

static ssize_t fan_status_show(struct device *dev,
                               struct device_attribute *devattr, char *buf)
{
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
        struct pc87360_data *data = pc87360_update_device(dev);
        return sprintf(buf, "%u\n",
                       FAN_STATUS_FROM_REG(data->fan_status[attr->index]));
}

static struct sensor_device_attribute fan_status[] = {
        SENSOR_ATTR_RO(fan1_status, fan_status, 0),
        SENSOR_ATTR_RO(fan2_status, fan_status, 1),
        SENSOR_ATTR_RO(fan3_status, fan_status, 2),
};

static ssize_t fan_div_show(struct device *dev,
                            struct device_attribute *devattr, char *buf)
{
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
        struct pc87360_data *data = pc87360_update_device(dev);
        return sprintf(buf, "%u\n",
                       FAN_DIV_FROM_REG(data->fan_status[attr->index]));
}

static struct sensor_device_attribute fan_div[] = {
        SENSOR_ATTR_RO(fan1_div, fan_div, 0),
        SENSOR_ATTR_RO(fan2_div, fan_div, 1),
        SENSOR_ATTR_RO(fan3_div, fan_div, 2),
};

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 pc87360_data *data = pc87360_update_device(dev);
        return sprintf(buf, "%u\n", FAN_FROM_REG(data->fan_min[attr->index],
                       FAN_DIV_FROM_REG(data->fan_status[attr->index])));
}

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 pc87360_data *data = dev_get_drvdata(dev);
        long fan_min;
        int err;

        err = kstrtol(buf, 10, &fan_min);
        if (err)
                return err;

        mutex_lock(&data->update_lock);
        fan_min = FAN_TO_REG(fan_min,
                             FAN_DIV_FROM_REG(data->fan_status[attr->index]));

        /* If it wouldn't fit, change clock divisor */
        while (fan_min > 255
            && (data->fan_status[attr->index] & 0x60) != 0x60) {
                fan_min >>= 1;
                data->fan[attr->index] >>= 1;
                data->fan_status[attr->index] += 0x20;
        }
        data->fan_min[attr->index] = fan_min > 255 ? 255 : fan_min;
        pc87360_write_value(data, LD_FAN, NO_BANK,
                            PC87360_REG_FAN_MIN(attr->index),
                            data->fan_min[attr->index]);

        /* Write new divider, preserve alarm bits */
        pc87360_write_value(data, LD_FAN, NO_BANK,
                            PC87360_REG_FAN_STATUS(attr->index),
                            data->fan_status[attr->index] & 0xF9);
        mutex_unlock(&data->update_lock);

        return count;
}

static struct sensor_device_attribute fan_min[] = {
        SENSOR_ATTR_RW(fan1_min, fan_min, 0),
        SENSOR_ATTR_RW(fan2_min, fan_min, 1),
        SENSOR_ATTR_RW(fan3_min, fan_min, 2),
};

#define FAN_UNIT_ATTRS(X)               \
{       &fan_input[X].dev_attr.attr,    \
        &fan_status[X].dev_attr.attr,   \
        &fan_div[X].dev_attr.attr,      \
        &fan_min[X].dev_attr.attr,      \
        NULL                            \
}

static struct attribute *pc8736x_fan_attr[][5] = {
        FAN_UNIT_ATTRS(0),
        FAN_UNIT_ATTRS(1),
        FAN_UNIT_ATTRS(2)
};

static const struct attribute_group pc8736x_fan_attr_group[] = {
        { .attrs = pc8736x_fan_attr[0], },
        { .attrs = pc8736x_fan_attr[1], },
        { .attrs = pc8736x_fan_attr[2], },
};

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 pc87360_data *data = pc87360_update_device(dev);
        return sprintf(buf, "%u\n",
                       PWM_FROM_REG(data->pwm[attr->index],
                                    FAN_CONFIG_INVERT(data->fan_conf,
                                                      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 pc87360_data *data = dev_get_drvdata(dev);
        long val;
        int err;

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

        mutex_lock(&data->update_lock);
        data->pwm[attr->index] = PWM_TO_REG(val,
                              FAN_CONFIG_INVERT(data->fan_conf, attr->index));
        pc87360_write_value(data, LD_FAN, NO_BANK, PC87360_REG_PWM(attr->index),
                            data->pwm[attr->index]);
        mutex_unlock(&data->update_lock);
        return count;
}

static struct sensor_device_attribute pwm[] = {
        SENSOR_ATTR_RW(pwm1, pwm, 0),
        SENSOR_ATTR_RW(pwm2, pwm, 1),
        SENSOR_ATTR_RW(pwm3, pwm, 2),
};

static ssize_t name_show(struct device *dev,
                        struct device_attribute *devattr, char *buf)
{
        struct pc87360_data *data = dev_get_drvdata(dev);
        return sprintf(buf, "%s\n", data->name);
}

static DEVICE_ATTR_RO(name);

static void pc87360_remove_files(struct device *dev)
{
        int i;

        device_remove_file(dev, &dev_attr_name);
        device_remove_file(dev, &dev_attr_alarms_temp);
        for (i = 0; i < ARRAY_SIZE(pc8736x_temp_attr_group); i++)
                sysfs_remove_group(&dev->kobj, &pc8736x_temp_attr_group[i]);
        for (i = 0; i < ARRAY_SIZE(pc8736x_fan_attr_group); i++) {
                sysfs_remove_group(&pdev->dev.kobj, &pc8736x_fan_attr_group[i]);
                device_remove_file(dev, &pwm[i].dev_attr);
        }
        sysfs_remove_group(&dev->kobj, &pc8736x_therm_group);
        sysfs_remove_group(&dev->kobj, &pc8736x_vin_group);
}

static void pc87360_init_device(struct platform_device *pdev,
                                int use_thermistors)
{
        struct pc87360_data *data = platform_get_drvdata(pdev);
        int i, nr;
        const u8 init_in[14] = { 2, 2, 2, 2, 2, 2, 2, 1, 1, 3, 1, 2, 2, 2 };
        const u8 init_temp[3] = { 2, 2, 1 };
        u8 reg;

        if (init >= 2 && data->innr) {
                reg = pc87360_read_value(data, LD_IN, NO_BANK,
                                         PC87365_REG_IN_CONVRATE);
                dev_info(&pdev->dev,
                         "VLM conversion set to 1s period, 160us delay\n");
                pc87360_write_value(data, LD_IN, NO_BANK,
                                    PC87365_REG_IN_CONVRATE,
                                    (reg & 0xC0) | 0x11);
        }

        nr = min(data->innr, 11);
        for (i = 0; i < nr; i++) {
                reg = pc87360_read_value(data, LD_IN, i,
                                         PC87365_REG_IN_STATUS);
                dev_dbg(&pdev->dev, "bios in%d status:0x%02x\n", i, reg);
                if (init >= init_in[i]) {
                        /* Forcibly enable voltage channel */
                        if (!(reg & CHAN_ENA)) {
                                dev_dbg(&pdev->dev, "Forcibly enabling in%d\n",
                                        i);
                                pc87360_write_value(data, LD_IN, i,
                                                    PC87365_REG_IN_STATUS,
                                                    (reg & 0x68) | 0x87);
                        }
                }
        }

        /*
         * We can't blindly trust the Super-I/O space configuration bit,
         * most BIOS won't set it properly
         */
        dev_dbg(&pdev->dev, "bios thermistors:%d\n", use_thermistors);
        for (i = 11; i < data->innr; i++) {
                reg = pc87360_read_value(data, LD_IN, i,
                                         PC87365_REG_TEMP_STATUS);
                use_thermistors = use_thermistors || (reg & CHAN_ENA);
                /* thermistors are temp[4-6], measured on vin[11-14] */
                dev_dbg(&pdev->dev, "bios temp%d_status:0x%02x\n", i-7, reg);
        }
        dev_dbg(&pdev->dev, "using thermistors:%d\n", use_thermistors);

        i = use_thermistors ? 2 : 0;
        for (; i < data->tempnr; i++) {
                reg = pc87360_read_value(data, LD_TEMP, i,
                                         PC87365_REG_TEMP_STATUS);
                dev_dbg(&pdev->dev, "bios temp%d_status:0x%02x\n", i + 1, reg);
                if (init >= init_temp[i]) {
                        /* Forcibly enable temperature channel */
                        if (!(reg & CHAN_ENA)) {
                                dev_dbg(&pdev->dev,
                                        "Forcibly enabling temp%d\n", i + 1);
                                pc87360_write_value(data, LD_TEMP, i,
                                                    PC87365_REG_TEMP_STATUS,
                                                    0xCF);
                        }
                }
        }

        if (use_thermistors) {
                for (i = 11; i < data->innr; i++) {
                        if (init >= init_in[i]) {
                                /*
                                 * The pin may already be used by thermal
                                 * diodes
                                 */
                                reg = pc87360_read_value(data, LD_TEMP,
                                      (i - 11) / 2, PC87365_REG_TEMP_STATUS);
                                if (reg & CHAN_ENA) {
                                        dev_dbg(&pdev->dev,
                        "Skipping temp%d, pin already in use by temp%d\n",
                                                i - 7, (i - 11) / 2);
                                        continue;
                                }

                                /* Forcibly enable thermistor channel */
                                reg = pc87360_read_value(data, LD_IN, i,
                                                         PC87365_REG_IN_STATUS);
                                if (!(reg & CHAN_ENA)) {
                                        dev_dbg(&pdev->dev,
                                                "Forcibly enabling temp%d\n",
                                                i - 7);
                                        pc87360_write_value(data, LD_IN, i,
                                                PC87365_REG_TEMP_STATUS,
                                                (reg & 0x60) | 0x8F);
                                }
                        }
                }
        }

        if (data->innr) {
                reg = pc87360_read_value(data, LD_IN, NO_BANK,
                                         PC87365_REG_IN_CONFIG);
                dev_dbg(&pdev->dev, "bios vin-cfg:0x%02x\n", reg);
                if (reg & CHAN_ENA) {
                        dev_dbg(&pdev->dev,
                                "Forcibly enabling monitoring (VLM)\n");
                        pc87360_write_value(data, LD_IN, NO_BANK,
                                            PC87365_REG_IN_CONFIG,
                                            reg & 0xFE);
                }
        }

        if (data->tempnr) {
                reg = pc87360_read_value(data, LD_TEMP, NO_BANK,
                                         PC87365_REG_TEMP_CONFIG);
                dev_dbg(&pdev->dev, "bios temp-cfg:0x%02x\n", reg);
                if (reg & CHAN_ENA) {
                        dev_dbg(&pdev->dev,
                                "Forcibly enabling monitoring (TMS)\n");
                        pc87360_write_value(data, LD_TEMP, NO_BANK,
                                            PC87365_REG_TEMP_CONFIG,
                                            reg & 0xFE);
                }

                if (init >= 2) {
                        /* Chip config as documented by National Semi. */
                        pc87360_write_value(data, LD_TEMP, 0xF, 0xA, 0x08);
                        /*
                         * We voluntarily omit the bank here, in case the
                         * sequence itself matters. It shouldn't be a problem,
                         * since nobody else is supposed to access the
                         * device at that point.
                         */
                        pc87360_write_value(data, LD_TEMP, NO_BANK, 0xB, 0x04);
                        pc87360_write_value(data, LD_TEMP, NO_BANK, 0xC, 0x35);
                        pc87360_write_value(data, LD_TEMP, NO_BANK, 0xD, 0x05);
                        pc87360_write_value(data, LD_TEMP, NO_BANK, 0xE, 0x05);
                }
        }
}

static int pc87360_probe(struct platform_device *pdev)
{
        int i;
        struct pc87360_data *data;
        int err = 0;
        const char *name;
        int use_thermistors = 0;
        struct device *dev = &pdev->dev;

        data = devm_kzalloc(dev, sizeof(struct pc87360_data), GFP_KERNEL);
        if (!data)
                return -ENOMEM;

        switch (devid) {
        default:
                name = "pc87360";
                data->fannr = 2;
                break;
        case 0xe8:
                name = "pc87363";
                data->fannr = 2;
                break;
        case 0xe4:
                name = "pc87364";
                data->fannr = 3;
                break;
        case 0xe5:
                name = "pc87365";
                data->fannr = extra_isa[0] ? 3 : 0;
                data->innr = extra_isa[1] ? 11 : 0;
                data->tempnr = extra_isa[2] ? 2 : 0;
                break;
        case 0xe9:
                name = "pc87366";
                data->fannr = extra_isa[0] ? 3 : 0;
                data->innr = extra_isa[1] ? 14 : 0;
                data->tempnr = extra_isa[2] ? 3 : 0;
                break;
        }

        data->name = name;
        mutex_init(&data->lock);
        mutex_init(&data->update_lock);
        platform_set_drvdata(pdev, data);

        for (i = 0; i < LDNI_MAX; i++) {
                data->address[i] = extra_isa[i];
                if (data->address[i]
                 && !devm_request_region(dev, extra_isa[i], PC87360_EXTENT,
                                         DRIVER_NAME)) {
                        dev_err(dev,
                                "Region 0x%x-0x%x already in use!\n",
                                extra_isa[i], extra_isa[i]+PC87360_EXTENT-1);
                        return -EBUSY;
                }
        }

        /* Retrieve the fans configuration from Super-I/O space */
        if (data->fannr)
                data->fan_conf = confreg[0] | (confreg[1] << 8);

        /*
         * Use the correct reference voltage
         * Unless both the VLM and the TMS logical devices agree to
         * use an external Vref, the internal one is used.
         */
        if (data->innr) {
                i = pc87360_read_value(data, LD_IN, NO_BANK,
                                       PC87365_REG_IN_CONFIG);
                if (data->tempnr) {
                        i &= pc87360_read_value(data, LD_TEMP, NO_BANK,
                                                PC87365_REG_TEMP_CONFIG);
                }
                data->in_vref = (i&0x02) ? 3025 : 2966;
                dev_dbg(dev, "Using %s reference voltage\n",
                        (i&0x02) ? "external" : "internal");

                data->vid_conf = confreg[3];
                data->vrm = vid_which_vrm();
        }

        /* Fan clock dividers may be needed before any data is read */
        for (i = 0; i < data->fannr; i++) {
                if (FAN_CONFIG_MONITOR(data->fan_conf, i))
                        data->fan_status[i] = pc87360_read_value(data,
                                              LD_FAN, NO_BANK,
                                              PC87360_REG_FAN_STATUS(i));
        }

        if (init > 0) {
                if (devid == 0xe9 && data->address[1]) /* PC87366 */
                        use_thermistors = confreg[2] & 0x40;

                pc87360_init_device(pdev, use_thermistors);
        }

        /* Register all-or-nothing sysfs groups */

        if (data->innr) {
                err = sysfs_create_group(&dev->kobj, &pc8736x_vin_group);
                if (err)
                        goto error;
        }

        if (data->innr == 14) {
                err = sysfs_create_group(&dev->kobj, &pc8736x_therm_group);
                if (err)
                        goto error;
        }

        /* create device attr-files for varying sysfs groups */

        if (data->tempnr) {
                for (i = 0; i < data->tempnr; i++) {
                        err = sysfs_create_group(&dev->kobj,
                                                 &pc8736x_temp_attr_group[i]);
                        if (err)
                                goto error;
                }
                err = device_create_file(dev, &dev_attr_alarms_temp);
                if (err)
                        goto error;
        }

        for (i = 0; i < data->fannr; i++) {
                if (FAN_CONFIG_MONITOR(data->fan_conf, i)) {
                        err = sysfs_create_group(&dev->kobj,
                                                 &pc8736x_fan_attr_group[i]);
                        if (err)
                                goto error;
                }
                if (FAN_CONFIG_CONTROL(data->fan_conf, i)) {
                        err = device_create_file(dev, &pwm[i].dev_attr);
                        if (err)
                                goto error;
                }
        }

        err = device_create_file(dev, &dev_attr_name);
        if (err)
                goto error;

        data->hwmon_dev = hwmon_device_register(dev);
        if (IS_ERR(data->hwmon_dev)) {
                err = PTR_ERR(data->hwmon_dev);
                goto error;
        }
        return 0;

error:
        pc87360_remove_files(dev);
        return err;
}

static void pc87360_remove(struct platform_device *pdev)
{
        struct pc87360_data *data = platform_get_drvdata(pdev);

        hwmon_device_unregister(data->hwmon_dev);
        pc87360_remove_files(&pdev->dev);
}

/*
 * Driver data
 */
static struct platform_driver pc87360_driver = {
        .driver = {
                .name   = DRIVER_NAME,
        },
        .probe          = pc87360_probe,
        .remove         = pc87360_remove,
};

/*
 * Device detection, registration and update
 */

static int __init pc87360_find(int sioaddr, u8 *devid,
                               unsigned short *addresses)
{
        u16 val;
        int i;
        int nrdev; /* logical device count */

        /* No superio_enter */

        /* Identify device */
        val = force_id ? force_id : superio_inb(sioaddr, DEVID);
        switch (val) {
        case 0xE1: /* PC87360 */
        case 0xE8: /* PC87363 */
        case 0xE4: /* PC87364 */
                nrdev = 1;
                break;
        case 0xE5: /* PC87365 */
        case 0xE9: /* PC87366 */
                nrdev = 3;
                break;
        default:
                superio_exit(sioaddr);
                return -ENODEV;
        }
        /* Remember the device id */
        *devid = val;

        for (i = 0; i < nrdev; i++) {
                /* select logical device */
                superio_outb(sioaddr, DEV, logdev[i]);

                val = superio_inb(sioaddr, ACT);
                if (!(val & 0x01)) {
                        pr_info("Device 0x%02x not activated\n", logdev[i]);
                        continue;
                }

                val = (superio_inb(sioaddr, BASE) << 8)
                    | superio_inb(sioaddr, BASE + 1);
                if (!val) {
                        pr_info("Base address not set for device 0x%02x\n",
                                logdev[i]);
                        continue;
                }

                addresses[i] = val;

                if (i == 0) { /* Fans */
                        confreg[0] = superio_inb(sioaddr, 0xF0);
                        confreg[1] = superio_inb(sioaddr, 0xF1);

                        pr_debug("Fan %d: mon=%d ctrl=%d inv=%d\n", 1,
                                 (confreg[0] >> 2) & 1, (confreg[0] >> 3) & 1,
                                 (confreg[0] >> 4) & 1);
                        pr_debug("Fan %d: mon=%d ctrl=%d inv=%d\n", 2,
                                 (confreg[0] >> 5) & 1, (confreg[0] >> 6) & 1,
                                 (confreg[0] >> 7) & 1);
                        pr_debug("Fan %d: mon=%d ctrl=%d inv=%d\n", 3,
                                 confreg[1] & 1, (confreg[1] >> 1) & 1,
                                 (confreg[1] >> 2) & 1);
                } else if (i == 1) { /* Voltages */
                        /* Are we using thermistors? */
                        if (*devid == 0xE9) { /* PC87366 */
                                /*
                                 * These registers are not logical-device
                                 * specific, just that we won't need them if
                                 * we don't use the VLM device
                                 */
                                confreg[2] = superio_inb(sioaddr, 0x2B);
                                confreg[3] = superio_inb(sioaddr, 0x25);

                                if (confreg[2] & 0x40) {
                                        pr_info("Using thermistors for temperature monitoring\n");
                                }
                                if (confreg[3] & 0xE0) {
                                        pr_info("VID inputs routed (mode %u)\n",
                                                confreg[3] >> 5);
                                }
                        }
                }
        }

        superio_exit(sioaddr);
        return 0;
}

static int __init pc87360_device_add(unsigned short address)
{
        struct resource res[3];
        int err, i, res_count;

        pdev = platform_device_alloc("pc87360", address);
        if (!pdev) {
                err = -ENOMEM;
                pr_err("Device allocation failed\n");
                goto exit;
        }

        memset(res, 0, 3 * sizeof(struct resource));
        res_count = 0;
        for (i = 0; i < 3; i++) {
                if (!extra_isa[i])
                        continue;
                res[res_count].start = extra_isa[i];
                res[res_count].end = extra_isa[i] + PC87360_EXTENT - 1;
                res[res_count].name = "pc87360";
                res[res_count].flags = IORESOURCE_IO;

                err = acpi_check_resource_conflict(&res[res_count]);
                if (err)
                        goto exit_device_put;

                res_count++;
        }

        err = platform_device_add_resources(pdev, res, res_count);
        if (err) {
                pr_err("Device resources addition failed (%d)\n", err);
                goto exit_device_put;
        }

        err = platform_device_add(pdev);
        if (err) {
                pr_err("Device addition failed (%d)\n", err);
                goto exit_device_put;
        }

        return 0;

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

static int __init pc87360_init(void)
{
        int err, i;
        unsigned short address = 0;

        if (pc87360_find(0x2e, &devid, extra_isa)
         && pc87360_find(0x4e, &devid, extra_isa)) {
                pr_warn("PC8736x not detected, module not inserted\n");
                return -ENODEV;
        }

        /* Arbitrarily pick one of the addresses */
        for (i = 0; i < 3; i++) {
                if (extra_isa[i] != 0x0000) {
                        address = extra_isa[i];
                        break;
                }
        }

        if (address == 0x0000) {
                pr_warn("No active logical device, module not inserted\n");
                return -ENODEV;
        }

        err = platform_driver_register(&pc87360_driver);
        if (err)
                goto exit;

        /* Sets global pdev as a side effect */
        err = pc87360_device_add(address);
        if (err)
                goto exit_driver;

        return 0;

 exit_driver:
        platform_driver_unregister(&pc87360_driver);
 exit:
        return err;
}

static void __exit pc87360_exit(void)
{
        platform_device_unregister(pdev);
        platform_driver_unregister(&pc87360_driver);
}

MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>");
MODULE_DESCRIPTION("PC8736x hardware monitor");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:" DRIVER_NAME);

module_init(pc87360_init);
module_exit(pc87360_exit);