/*
 * f71805f.c - driver for the Fintek F71805F/FG and F71872F/FG Super-I/O
 *             chips integrated hardware monitoring features
 * Copyright (C) 2005-2006  Jean Delvare <jdelvare@suse.de>
 *
 * The F71805F/FG is a LPC Super-I/O chip made by Fintek. It integrates
 * complete hardware monitoring features: voltage, fan and temperature
 * sensors, and manual and automatic fan speed control.
 *
 * The F71872F/FG is almost the same, with two more voltages monitored,
 * and 6 VID inputs.
 *
 * The F71806F/FG is essentially the same as the F71872F/FG. It even has
 * the same chip ID, so the driver can't differentiate between.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#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/err.h>
#include <linux/mutex.h>
#include <linux/sysfs.h>
#include <linux/ioport.h>
#include <linux/acpi.h>
#include <linux/io.h>

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

static struct platform_device *pdev;

#define DRVNAME "f71805f"
enum kinds { f71805f, f71872f };

/*
 * Super-I/O constants and functions
 */

#define F71805F_LD_HWM          0x04

#define SIO_REG_LDSEL           0x07    /* Logical device select */
#define SIO_REG_DEVID           0x20    /* Device ID (2 bytes) */
#define SIO_REG_DEVREV          0x22    /* Device revision */
#define SIO_REG_MANID           0x23    /* Fintek ID (2 bytes) */
#define SIO_REG_FNSEL1          0x29    /* Multi Function Select 1 (F71872F) */
#define SIO_REG_ENABLE          0x30    /* Logical device enable */
#define SIO_REG_ADDR            0x60    /* Logical device address (2 bytes) */

#define SIO_FINTEK_ID           0x1934
#define SIO_F71805F_ID          0x0406
#define SIO_F71872F_ID          0x0341

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

static int
superio_inw(int base, int reg)
{
        int val;
        outb(reg++, base);
        val = inb(base + 1) << 8;
        outb(reg, base);
        val |= inb(base + 1);
        return val;
}

static inline void
superio_select(int base, int ld)
{
        outb(SIO_REG_LDSEL, base);
        outb(ld, base + 1);
}

static inline void
superio_enter(int base)
{
        outb(0x87, base);
        outb(0x87, base);
}

static inline void
superio_exit(int base)
{
        outb(0xaa, base);
}

/*
 * ISA constants
 */

#define REGION_LENGTH           8
#define ADDR_REG_OFFSET         5
#define DATA_REG_OFFSET         6

/*
 * Registers
 */

/* in nr from 0 to 10 (8-bit values) */
#define F71805F_REG_IN(nr)              (0x10 + (nr))
#define F71805F_REG_IN_HIGH(nr)         ((nr) < 10 ? 0x40 + 2 * (nr) : 0x2E)
#define F71805F_REG_IN_LOW(nr)          ((nr) < 10 ? 0x41 + 2 * (nr) : 0x2F)
/* fan nr from 0 to 2 (12-bit values, two registers) */
#define F71805F_REG_FAN(nr)             (0x20 + 2 * (nr))
#define F71805F_REG_FAN_LOW(nr)         (0x28 + 2 * (nr))
#define F71805F_REG_FAN_TARGET(nr)      (0x69 + 16 * (nr))
#define F71805F_REG_FAN_CTRL(nr)        (0x60 + 16 * (nr))
#define F71805F_REG_PWM_FREQ(nr)        (0x63 + 16 * (nr))
#define F71805F_REG_PWM_DUTY(nr)        (0x6B + 16 * (nr))
/* temp nr from 0 to 2 (8-bit values) */
#define F71805F_REG_TEMP(nr)            (0x1B + (nr))
#define F71805F_REG_TEMP_HIGH(nr)       (0x54 + 2 * (nr))
#define F71805F_REG_TEMP_HYST(nr)       (0x55 + 2 * (nr))
#define F71805F_REG_TEMP_MODE           0x01
/* pwm/fan pwmnr from 0 to 2, auto point apnr from 0 to 2 */
/* map Fintek numbers to our numbers as follows: 9->0, 5->1, 1->2 */
#define F71805F_REG_PWM_AUTO_POINT_TEMP(pwmnr, apnr) \
                                        (0xA0 + 0x10 * (pwmnr) + (2 - (apnr)))
#define F71805F_REG_PWM_AUTO_POINT_FAN(pwmnr, apnr) \
                                        (0xA4 + 0x10 * (pwmnr) + \
                                                2 * (2 - (apnr)))

#define F71805F_REG_START               0x00
/* status nr from 0 to 2 */
#define F71805F_REG_STATUS(nr)          (0x36 + (nr))

/* individual register bits */
#define FAN_CTRL_DC_MODE                0x10
#define FAN_CTRL_LATCH_FULL             0x08
#define FAN_CTRL_MODE_MASK              0x03
#define FAN_CTRL_MODE_SPEED             0x00
#define FAN_CTRL_MODE_TEMPERATURE       0x01
#define FAN_CTRL_MODE_MANUAL            0x02

/*
 * Data structures and manipulation thereof
 */

struct f71805f_auto_point {
        u8 temp[3];
        u16 fan[3];
};

struct f71805f_data {
        unsigned short addr;
        const char *name;
        struct device *hwmon_dev;

        struct mutex update_lock;
        char valid;             /* !=0 if following fields are valid */
        unsigned long last_updated;     /* In jiffies */
        unsigned long last_limits;      /* In jiffies */

        /* Register values */
        u8 in[11];
        u8 in_high[11];
        u8 in_low[11];
        u16 has_in;
        u16 fan[3];
        u16 fan_low[3];
        u16 fan_target[3];
        u8 fan_ctrl[3];
        u8 pwm[3];
        u8 pwm_freq[3];
        u8 temp[3];
        u8 temp_high[3];
        u8 temp_hyst[3];
        u8 temp_mode;
        unsigned long alarms;
        struct f71805f_auto_point auto_points[3];
};

struct f71805f_sio_data {
        enum kinds kind;
        u8 fnsel1;
};

static inline long in_from_reg(u8 reg)
{
        return reg * 8;
}

/* The 2 least significant bits are not used */
static inline u8 in_to_reg(long val)
{
        if (val <= 0)
                return 0;
        if (val >= 2016)
                return 0xfc;
        return ((val + 16) / 32) << 2;
}

/* in0 is downscaled by a factor 2 internally */
static inline long in0_from_reg(u8 reg)
{
        return reg * 16;
}

static inline u8 in0_to_reg(long val)
{
        if (val <= 0)
                return 0;
        if (val >= 4032)
                return 0xfc;
        return ((val + 32) / 64) << 2;
}

/* The 4 most significant bits are not used */
static inline long fan_from_reg(u16 reg)
{
        reg &= 0xfff;
        if (!reg || reg == 0xfff)
                return 0;
        return 1500000 / reg;
}

static inline u16 fan_to_reg(long rpm)
{
        /*
         * If the low limit is set below what the chip can measure,
         * store the largest possible 12-bit value in the registers,
         * so that no alarm will ever trigger.
         */
        if (rpm < 367)
                return 0xfff;
        return 1500000 / rpm;
}

static inline unsigned long pwm_freq_from_reg(u8 reg)
{
        unsigned long clock = (reg & 0x80) ? 48000000UL : 1000000UL;

        reg &= 0x7f;
        if (reg == 0)
                reg++;
        return clock / (reg << 8);
}

static inline u8 pwm_freq_to_reg(unsigned long val)
{
        if (val >= 187500)      /* The highest we can do */
                return 0x80;
        if (val >= 1475)        /* Use 48 MHz clock */
                return 0x80 | (48000000UL / (val << 8));
        if (val < 31)           /* The lowest we can do */
                return 0x7f;
        else                    /* Use 1 MHz clock */
                return 1000000UL / (val << 8);
}

static inline int pwm_mode_from_reg(u8 reg)
{
        return !(reg & FAN_CTRL_DC_MODE);
}

static inline long temp_from_reg(u8 reg)
{
        return reg * 1000;
}

static inline u8 temp_to_reg(long val)
{
        if (val <= 0)
                return 0;
        if (val >= 1000 * 0xff)
                return 0xff;
        return (val + 500) / 1000;
}

/*
 * Device I/O access
 */

/* Must be called with data->update_lock held, except during initialization */
static u8 f71805f_read8(struct f71805f_data *data, u8 reg)
{
        outb(reg, data->addr + ADDR_REG_OFFSET);
        return inb(data->addr + DATA_REG_OFFSET);
}

/* Must be called with data->update_lock held, except during initialization */
static void f71805f_write8(struct f71805f_data *data, u8 reg, u8 val)
{
        outb(reg, data->addr + ADDR_REG_OFFSET);
        outb(val, data->addr + DATA_REG_OFFSET);
}

/*
 * It is important to read the MSB first, because doing so latches the
 * value of the LSB, so we are sure both bytes belong to the same value.
 * Must be called with data->update_lock held, except during initialization
 */
static u16 f71805f_read16(struct f71805f_data *data, u8 reg)
{
        u16 val;

        outb(reg, data->addr + ADDR_REG_OFFSET);
        val = inb(data->addr + DATA_REG_OFFSET) << 8;
        outb(++reg, data->addr + ADDR_REG_OFFSET);
        val |= inb(data->addr + DATA_REG_OFFSET);

        return val;
}

/* Must be called with data->update_lock held, except during initialization */
static void f71805f_write16(struct f71805f_data *data, u8 reg, u16 val)
{
        outb(reg, data->addr + ADDR_REG_OFFSET);
        outb(val >> 8, data->addr + DATA_REG_OFFSET);
        outb(++reg, data->addr + ADDR_REG_OFFSET);
        outb(val & 0xff, data->addr + DATA_REG_OFFSET);
}

static struct f71805f_data *f71805f_update_device(struct device *dev)
{
        struct f71805f_data *data = dev_get_drvdata(dev);
        int nr, apnr;

        mutex_lock(&data->update_lock);

        /* Limit registers cache is refreshed after 60 seconds */
        if (time_after(jiffies, data->last_updated + 60 * HZ)
         || !data->valid) {
                for (nr = 0; nr < 11; nr++) {
                        if (!(data->has_in & (1 << nr)))
                                continue;
                        data->in_high[nr] = f71805f_read8(data,
                                            F71805F_REG_IN_HIGH(nr));
                        data->in_low[nr] = f71805f_read8(data,
                                           F71805F_REG_IN_LOW(nr));
                }
                for (nr = 0; nr < 3; nr++) {
                        data->fan_low[nr] = f71805f_read16(data,
                                            F71805F_REG_FAN_LOW(nr));
                        data->fan_target[nr] = f71805f_read16(data,
                                               F71805F_REG_FAN_TARGET(nr));
                        data->pwm_freq[nr] = f71805f_read8(data,
                                             F71805F_REG_PWM_FREQ(nr));
                }
                for (nr = 0; nr < 3; nr++) {
                        data->temp_high[nr] = f71805f_read8(data,
                                              F71805F_REG_TEMP_HIGH(nr));
                        data->temp_hyst[nr] = f71805f_read8(data,
                                              F71805F_REG_TEMP_HYST(nr));
                }
                data->temp_mode = f71805f_read8(data, F71805F_REG_TEMP_MODE);
                for (nr = 0; nr < 3; nr++) {
                        for (apnr = 0; apnr < 3; apnr++) {
                                data->auto_points[nr].temp[apnr] =
                                        f71805f_read8(data,
                                        F71805F_REG_PWM_AUTO_POINT_TEMP(nr,
                                                                        apnr));
                                data->auto_points[nr].fan[apnr] =
                                        f71805f_read16(data,
                                        F71805F_REG_PWM_AUTO_POINT_FAN(nr,
                                                                       apnr));
                        }
                }

                data->last_limits = jiffies;
        }

        /* Measurement registers cache is refreshed after 1 second */
        if (time_after(jiffies, data->last_updated + HZ)
         || !data->valid) {
                for (nr = 0; nr < 11; nr++) {
                        if (!(data->has_in & (1 << nr)))
                                continue;
                        data->in[nr] = f71805f_read8(data,
                                       F71805F_REG_IN(nr));
                }
                for (nr = 0; nr < 3; nr++) {
                        data->fan[nr] = f71805f_read16(data,
                                        F71805F_REG_FAN(nr));
                        data->fan_ctrl[nr] = f71805f_read8(data,
                                             F71805F_REG_FAN_CTRL(nr));
                        data->pwm[nr] = f71805f_read8(data,
                                        F71805F_REG_PWM_DUTY(nr));
                }
                for (nr = 0; nr < 3; nr++) {
                        data->temp[nr] = f71805f_read8(data,
                                         F71805F_REG_TEMP(nr));
                }
                data->alarms = f71805f_read8(data, F71805F_REG_STATUS(0))
                        + (f71805f_read8(data, F71805F_REG_STATUS(1)) << 8)
                        + (f71805f_read8(data, F71805F_REG_STATUS(2)) << 16);

                data->last_updated = jiffies;
                data->valid = 1;
        }

        mutex_unlock(&data->update_lock);

        return data;
}

/*
 * Sysfs interface
 */

static ssize_t show_in0(struct device *dev, struct device_attribute *devattr,
                        char *buf)
{
        struct f71805f_data *data = f71805f_update_device(dev);
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
        int nr = attr->index;

        return sprintf(buf, "%ld\n", in0_from_reg(data->in[nr]));
}

static ssize_t show_in0_max(struct device *dev, struct device_attribute
                            *devattr, char *buf)
{
        struct f71805f_data *data = f71805f_update_device(dev);
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
        int nr = attr->index;

        return sprintf(buf, "%ld\n", in0_from_reg(data->in_high[nr]));
}

static ssize_t show_in0_min(struct device *dev, struct device_attribute
                            *devattr, char *buf)
{
        struct f71805f_data *data = f71805f_update_device(dev);
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
        int nr = attr->index;

        return sprintf(buf, "%ld\n", in0_from_reg(data->in_low[nr]));
}

static ssize_t set_in0_max(struct device *dev, struct device_attribute
                           *devattr, const char *buf, size_t count)
{
        struct f71805f_data *data = dev_get_drvdata(dev);
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
        int nr = attr->index;
        long val;
        int err;

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

        mutex_lock(&data->update_lock);
        data->in_high[nr] = in0_to_reg(val);
        f71805f_write8(data, F71805F_REG_IN_HIGH(nr), data->in_high[nr]);
        mutex_unlock(&data->update_lock);

        return count;
}

static ssize_t set_in0_min(struct device *dev, struct device_attribute
                           *devattr, const char *buf, size_t count)
{
        struct f71805f_data *data = dev_get_drvdata(dev);
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
        int nr = attr->index;
        long val;
        int err;

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

        mutex_lock(&data->update_lock);
        data->in_low[nr] = in0_to_reg(val);
        f71805f_write8(data, F71805F_REG_IN_LOW(nr), data->in_low[nr]);
        mutex_unlock(&data->update_lock);

        return count;
}

static ssize_t show_in(struct device *dev, struct device_attribute *devattr,
                       char *buf)
{
        struct f71805f_data *data = f71805f_update_device(dev);
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
        int nr = attr->index;

        return sprintf(buf, "%ld\n", in_from_reg(data->in[nr]));
}

static ssize_t show_in_max(struct device *dev, struct device_attribute
                           *devattr, char *buf)
{
        struct f71805f_data *data = f71805f_update_device(dev);
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
        int nr = attr->index;

        return sprintf(buf, "%ld\n", in_from_reg(data->in_high[nr]));
}

static ssize_t show_in_min(struct device *dev, struct device_attribute
                           *devattr, char *buf)
{
        struct f71805f_data *data = f71805f_update_device(dev);
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
        int nr = attr->index;

        return sprintf(buf, "%ld\n", in_from_reg(data->in_low[nr]));
}

static ssize_t set_in_max(struct device *dev, struct device_attribute
                          *devattr, const char *buf, size_t count)
{
        struct f71805f_data *data = dev_get_drvdata(dev);
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
        int nr = attr->index;
        long val;
        int err;

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

        mutex_lock(&data->update_lock);
        data->in_high[nr] = in_to_reg(val);
        f71805f_write8(data, F71805F_REG_IN_HIGH(nr), data->in_high[nr]);
        mutex_unlock(&data->update_lock);

        return count;
}

static ssize_t set_in_min(struct device *dev, struct device_attribute
                          *devattr, const char *buf, size_t count)
{
        struct f71805f_data *data = dev_get_drvdata(dev);
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
        int nr = attr->index;
        long val;
        int err;

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

        mutex_lock(&data->update_lock);
        data->in_low[nr] = in_to_reg(val);
        f71805f_write8(data, F71805F_REG_IN_LOW(nr), data->in_low[nr]);
        mutex_unlock(&data->update_lock);

        return count;
}

static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
                        char *buf)
{
        struct f71805f_data *data = f71805f_update_device(dev);
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
        int nr = attr->index;

        return sprintf(buf, "%ld\n", fan_from_reg(data->fan[nr]));
}

static ssize_t show_fan_min(struct device *dev, struct device_attribute
                            *devattr, char *buf)
{
        struct f71805f_data *data = f71805f_update_device(dev);
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
        int nr = attr->index;

        return sprintf(buf, "%ld\n", fan_from_reg(data->fan_low[nr]));
}

static ssize_t show_fan_target(struct device *dev, struct device_attribute
                               *devattr, char *buf)
{
        struct f71805f_data *data = f71805f_update_device(dev);
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
        int nr = attr->index;

        return sprintf(buf, "%ld\n", fan_from_reg(data->fan_target[nr]));
}

static ssize_t set_fan_min(struct device *dev, struct device_attribute
                           *devattr, const char *buf, size_t count)
{
        struct f71805f_data *data = dev_get_drvdata(dev);
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
        int nr = attr->index;
        long val;
        int err;

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

        mutex_lock(&data->update_lock);
        data->fan_low[nr] = fan_to_reg(val);
        f71805f_write16(data, F71805F_REG_FAN_LOW(nr), data->fan_low[nr]);
        mutex_unlock(&data->update_lock);

        return count;
}

static ssize_t set_fan_target(struct device *dev, struct device_attribute
                              *devattr, const char *buf, size_t count)
{
        struct f71805f_data *data = dev_get_drvdata(dev);
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
        int nr = attr->index;
        long val;
        int err;

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

        mutex_lock(&data->update_lock);
        data->fan_target[nr] = fan_to_reg(val);
        f71805f_write16(data, F71805F_REG_FAN_TARGET(nr),
                        data->fan_target[nr]);
        mutex_unlock(&data->update_lock);

        return count;
}

static ssize_t show_pwm(struct device *dev, struct device_attribute *devattr,
                        char *buf)
{
        struct f71805f_data *data = f71805f_update_device(dev);
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
        int nr = attr->index;

        return sprintf(buf, "%d\n", (int)data->pwm[nr]);
}

static ssize_t show_pwm_enable(struct device *dev, struct device_attribute
                               *devattr, char *buf)
{
        struct f71805f_data *data = f71805f_update_device(dev);
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
        int nr = attr->index;
        int mode;

        switch (data->fan_ctrl[nr] & FAN_CTRL_MODE_MASK) {
        case FAN_CTRL_MODE_SPEED:
                mode = 3;
                break;
        case FAN_CTRL_MODE_TEMPERATURE:
                mode = 2;
                break;
        default: /* MANUAL */
                mode = 1;
        }

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

static ssize_t show_pwm_freq(struct device *dev, struct device_attribute
                             *devattr, char *buf)
{
        struct f71805f_data *data = f71805f_update_device(dev);
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
        int nr = attr->index;

        return sprintf(buf, "%lu\n", pwm_freq_from_reg(data->pwm_freq[nr]));
}

static ssize_t show_pwm_mode(struct device *dev, struct device_attribute
                             *devattr, char *buf)
{
        struct f71805f_data *data = f71805f_update_device(dev);
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
        int nr = attr->index;

        return sprintf(buf, "%d\n", pwm_mode_from_reg(data->fan_ctrl[nr]));
}

static ssize_t set_pwm(struct device *dev, struct device_attribute *devattr,
                       const char *buf, size_t count)
{
        struct f71805f_data *data = dev_get_drvdata(dev);
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
        int nr = attr->index;
        unsigned long val;
        int err;

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

        if (val > 255)
                return -EINVAL;

        mutex_lock(&data->update_lock);
        data->pwm[nr] = val;
        f71805f_write8(data, F71805F_REG_PWM_DUTY(nr), data->pwm[nr]);
        mutex_unlock(&data->update_lock);

        return count;
}

static struct attribute *f71805f_attr_pwm[];

static ssize_t set_pwm_enable(struct device *dev, struct device_attribute
                              *devattr, const char *buf, size_t count)
{
        struct f71805f_data *data = dev_get_drvdata(dev);
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
        int nr = attr->index;
        u8 reg;
        unsigned long val;
        int err;

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

        if (val < 1 || val > 3)
                return -EINVAL;

        if (val > 1) { /* Automatic mode, user can't set PWM value */
                if (sysfs_chmod_file(&dev->kobj, f71805f_attr_pwm[nr],
                                     S_IRUGO))
                        dev_dbg(dev, "chmod -w pwm%d failed\n", nr + 1);
        }

        mutex_lock(&data->update_lock);
        reg = f71805f_read8(data, F71805F_REG_FAN_CTRL(nr))
            & ~FAN_CTRL_MODE_MASK;
        switch (val) {
        case 1:
                reg |= FAN_CTRL_MODE_MANUAL;
                break;
        case 2:
                reg |= FAN_CTRL_MODE_TEMPERATURE;
                break;
        case 3:
                reg |= FAN_CTRL_MODE_SPEED;
                break;
        }
        data->fan_ctrl[nr] = reg;
        f71805f_write8(data, F71805F_REG_FAN_CTRL(nr), reg);
        mutex_unlock(&data->update_lock);

        if (val == 1) { /* Manual mode, user can set PWM value */
                if (sysfs_chmod_file(&dev->kobj, f71805f_attr_pwm[nr],
                                     S_IRUGO | S_IWUSR))
                        dev_dbg(dev, "chmod +w pwm%d failed\n", nr + 1);
        }

        return count;
}

static ssize_t set_pwm_freq(struct device *dev, struct device_attribute
                            *devattr, const char *buf, size_t count)
{
        struct f71805f_data *data = dev_get_drvdata(dev);
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
        int nr = attr->index;
        unsigned long val;
        int err;

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

        mutex_lock(&data->update_lock);
        data->pwm_freq[nr] = pwm_freq_to_reg(val);
        f71805f_write8(data, F71805F_REG_PWM_FREQ(nr), data->pwm_freq[nr]);
        mutex_unlock(&data->update_lock);

        return count;
}

static ssize_t show_pwm_auto_point_temp(struct device *dev,
                                        struct device_attribute *devattr,
                                        char *buf)
{
        struct f71805f_data *data = dev_get_drvdata(dev);
        struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
        int pwmnr = attr->nr;
        int apnr = attr->index;

        return sprintf(buf, "%ld\n",
                       temp_from_reg(data->auto_points[pwmnr].temp[apnr]));
}

static ssize_t set_pwm_auto_point_temp(struct device *dev,
                                       struct device_attribute *devattr,
                                       const char *buf, size_t count)
{
        struct f71805f_data *data = dev_get_drvdata(dev);
        struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
        int pwmnr = attr->nr;
        int apnr = attr->index;
        unsigned long val;
        int err;

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

        mutex_lock(&data->update_lock);
        data->auto_points[pwmnr].temp[apnr] = temp_to_reg(val);
        f71805f_write8(data, F71805F_REG_PWM_AUTO_POINT_TEMP(pwmnr, apnr),
                       data->auto_points[pwmnr].temp[apnr]);
        mutex_unlock(&data->update_lock);

        return count;
}

static ssize_t show_pwm_auto_point_fan(struct device *dev,
                                       struct device_attribute *devattr,
                                       char *buf)
{
        struct f71805f_data *data = dev_get_drvdata(dev);
        struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
        int pwmnr = attr->nr;
        int apnr = attr->index;

        return sprintf(buf, "%ld\n",
                       fan_from_reg(data->auto_points[pwmnr].fan[apnr]));
}

static ssize_t set_pwm_auto_point_fan(struct device *dev,
                                      struct device_attribute *devattr,
                                      const char *buf, size_t count)
{
        struct f71805f_data *data = dev_get_drvdata(dev);
        struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
        int pwmnr = attr->nr;
        int apnr = attr->index;
        unsigned long val;
        int err;

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

        mutex_lock(&data->update_lock);
        data->auto_points[pwmnr].fan[apnr] = fan_to_reg(val);
        f71805f_write16(data, F71805F_REG_PWM_AUTO_POINT_FAN(pwmnr, apnr),
                        data->auto_points[pwmnr].fan[apnr]);
        mutex_unlock(&data->update_lock);

        return count;
}

static ssize_t show_temp(struct device *dev, struct device_attribute *devattr,
                         char *buf)
{
        struct f71805f_data *data = f71805f_update_device(dev);
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
        int nr = attr->index;

        return sprintf(buf, "%ld\n", temp_from_reg(data->temp[nr]));
}

static ssize_t show_temp_max(struct device *dev, struct device_attribute
                             *devattr, char *buf)
{
        struct f71805f_data *data = f71805f_update_device(dev);
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
        int nr = attr->index;

        return sprintf(buf, "%ld\n", temp_from_reg(data->temp_high[nr]));
}

static ssize_t show_temp_hyst(struct device *dev, struct device_attribute
                              *devattr, char *buf)
{
        struct f71805f_data *data = f71805f_update_device(dev);
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
        int nr = attr->index;

        return sprintf(buf, "%ld\n", temp_from_reg(data->temp_hyst[nr]));
}

static ssize_t show_temp_type(struct device *dev, struct device_attribute
                              *devattr, char *buf)
{
        struct f71805f_data *data = f71805f_update_device(dev);
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
        int nr = attr->index;

        /* 3 is diode, 4 is thermistor */
        return sprintf(buf, "%u\n", (data->temp_mode & (1 << nr)) ? 3 : 4);
}

static ssize_t set_temp_max(struct device *dev, struct device_attribute
                            *devattr, const char *buf, size_t count)
{
        struct f71805f_data *data = dev_get_drvdata(dev);
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
        int nr = attr->index;
        long val;
        int err;

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

        mutex_lock(&data->update_lock);
        data->temp_high[nr] = temp_to_reg(val);
        f71805f_write8(data, F71805F_REG_TEMP_HIGH(nr), data->temp_high[nr]);
        mutex_unlock(&data->update_lock);

        return count;
}

static ssize_t set_temp_hyst(struct device *dev, struct device_attribute
                             *devattr, const char *buf, size_t count)
{
        struct f71805f_data *data = dev_get_drvdata(dev);
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
        int nr = attr->index;
        long val;
        int err;

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

        mutex_lock(&data->update_lock);
        data->temp_hyst[nr] = temp_to_reg(val);
        f71805f_write8(data, F71805F_REG_TEMP_HYST(nr), data->temp_hyst[nr]);
        mutex_unlock(&data->update_lock);

        return count;
}

static ssize_t alarms_in_show(struct device *dev, struct device_attribute
                              *devattr, char *buf)
{
        struct f71805f_data *data = f71805f_update_device(dev);

        return sprintf(buf, "%lu\n", data->alarms & 0x7ff);
}

static ssize_t alarms_fan_show(struct device *dev, struct device_attribute
                               *devattr, char *buf)
{
        struct f71805f_data *data = f71805f_update_device(dev);

        return sprintf(buf, "%lu\n", (data->alarms >> 16) & 0x07);
}

static ssize_t alarms_temp_show(struct device *dev, struct device_attribute
                                *devattr, char *buf)
{
        struct f71805f_data *data = f71805f_update_device(dev);

        return sprintf(buf, "%lu\n", (data->alarms >> 11) & 0x07);
}

static ssize_t show_alarm(struct device *dev, struct device_attribute
                          *devattr, char *buf)
{
        struct f71805f_data *data = f71805f_update_device(dev);
        struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
        int bitnr = attr->index;

        return sprintf(buf, "%lu\n", (data->alarms >> bitnr) & 1);
}

static ssize_t name_show(struct device *dev, struct device_attribute
                         *devattr, char *buf)
{
        struct f71805f_data *data = dev_get_drvdata(dev);

        return sprintf(buf, "%s\n", data->name);
}

static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_in0, NULL, 0);
static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO | S_IWUSR,
                          show_in0_max, set_in0_max, 0);
static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO | S_IWUSR,
                          show_in0_min, set_in0_min, 0);
static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in, NULL, 1);
static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO | S_IWUSR,
                          show_in_max, set_in_max, 1);
static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO | S_IWUSR,
                          show_in_min, set_in_min, 1);

static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in, NULL, 2);
static SENSOR_DEVICE_ATTR(in2_max, S_IRUGO | S_IWUSR,
                          show_in_max, set_in_max, 2);
static SENSOR_DEVICE_ATTR(in2_min, S_IRUGO | S_IWUSR,
                          show_in_min, set_in_min, 2);
static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in, NULL, 3);
static SENSOR_DEVICE_ATTR(in3_max, S_IRUGO | S_IWUSR,
                          show_in_max, set_in_max, 3);
static SENSOR_DEVICE_ATTR(in3_min, S_IRUGO | S_IWUSR,
                          show_in_min, set_in_min, 3);
static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, show_in, NULL, 4);
static SENSOR_DEVICE_ATTR(in4_max, S_IRUGO | S_IWUSR,
                          show_in_max, set_in_max, 4);
static SENSOR_DEVICE_ATTR(in4_min, S_IRUGO | S_IWUSR,
                          show_in_min, set_in_min, 4);
static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, show_in, NULL, 5);
static SENSOR_DEVICE_ATTR(in5_max, S_IRUGO | S_IWUSR,
                          show_in_max, set_in_max, 5);
static SENSOR_DEVICE_ATTR(in5_min, S_IRUGO | S_IWUSR,
                          show_in_min, set_in_min, 5);
static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, show_in, NULL, 6);
static SENSOR_DEVICE_ATTR(in6_max, S_IRUGO | S_IWUSR,
                          show_in_max, set_in_max, 6);
static SENSOR_DEVICE_ATTR(in6_min, S_IRUGO | S_IWUSR,
                          show_in_min, set_in_min, 6);
static SENSOR_DEVICE_ATTR(in7_input, S_IRUGO, show_in, NULL, 7);
static SENSOR_DEVICE_ATTR(in7_max, S_IRUGO | S_IWUSR,
                          show_in_max, set_in_max, 7);
static SENSOR_DEVICE_ATTR(in7_min, S_IRUGO | S_IWUSR,
                          show_in_min, set_in_min, 7);
static SENSOR_DEVICE_ATTR(in8_input, S_IRUGO, show_in, NULL, 8);
static SENSOR_DEVICE_ATTR(in8_max, S_IRUGO | S_IWUSR,
                          show_in_max, set_in_max, 8);
static SENSOR_DEVICE_ATTR(in8_min, S_IRUGO | S_IWUSR,
                          show_in_min, set_in_min, 8);
static SENSOR_DEVICE_ATTR(in9_input, S_IRUGO, show_in0, NULL, 9);
static SENSOR_DEVICE_ATTR(in9_max, S_IRUGO | S_IWUSR,
                          show_in0_max, set_in0_max, 9);
static SENSOR_DEVICE_ATTR(in9_min, S_IRUGO | S_IWUSR,
                          show_in0_min, set_in0_min, 9);
static SENSOR_DEVICE_ATTR(in10_input, S_IRUGO, show_in0, NULL, 10);
static SENSOR_DEVICE_ATTR(in10_max, S_IRUGO | S_IWUSR,
                          show_in0_max, set_in0_max, 10);
static SENSOR_DEVICE_ATTR(in10_min, S_IRUGO | S_IWUSR,
                          show_in0_min, set_in0_min, 10);

static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR,
                          show_fan_min, set_fan_min, 0);
static SENSOR_DEVICE_ATTR(fan1_target, S_IRUGO | S_IWUSR,
                          show_fan_target, set_fan_target, 0);
static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO | S_IWUSR,
                          show_fan_min, set_fan_min, 1);
static SENSOR_DEVICE_ATTR(fan2_target, S_IRUGO | S_IWUSR,
                          show_fan_target, set_fan_target, 1);
static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
static SENSOR_DEVICE_ATTR(fan3_min, S_IRUGO | S_IWUSR,
                          show_fan_min, set_fan_min, 2);
static SENSOR_DEVICE_ATTR(fan3_target, S_IRUGO | S_IWUSR,
                          show_fan_target, set_fan_target, 2);

static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR,
                    show_temp_max, set_temp_max, 0);
static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR,
                    show_temp_hyst, set_temp_hyst, 0);
static SENSOR_DEVICE_ATTR(temp1_type, S_IRUGO, show_temp_type, NULL, 0);
static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO | S_IWUSR,
                    show_temp_max, set_temp_max, 1);
static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO | S_IWUSR,
                    show_temp_hyst, set_temp_hyst, 1);
static SENSOR_DEVICE_ATTR(temp2_type, S_IRUGO, show_temp_type, NULL, 1);
static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
static SENSOR_DEVICE_ATTR(temp3_max, S_IRUGO | S_IWUSR,
                    show_temp_max, set_temp_max, 2);
static SENSOR_DEVICE_ATTR(temp3_max_hyst, S_IRUGO | S_IWUSR,
                    show_temp_hyst, set_temp_hyst, 2);
static SENSOR_DEVICE_ATTR(temp3_type, S_IRUGO, show_temp_type, NULL, 2);

/*
 * pwm (value) files are created read-only, write permission is
 * then added or removed dynamically as needed
 */
static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO, show_pwm, set_pwm, 0);
static SENSOR_DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR,
                          show_pwm_enable, set_pwm_enable, 0);
static SENSOR_DEVICE_ATTR(pwm1_freq, S_IRUGO | S_IWUSR,
                          show_pwm_freq, set_pwm_freq, 0);
static SENSOR_DEVICE_ATTR(pwm1_mode, S_IRUGO, show_pwm_mode, NULL, 0);
static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO, show_pwm, set_pwm, 1);
static SENSOR_DEVICE_ATTR(pwm2_enable, S_IRUGO | S_IWUSR,
                          show_pwm_enable, set_pwm_enable, 1);
static SENSOR_DEVICE_ATTR(pwm2_freq, S_IRUGO | S_IWUSR,
                          show_pwm_freq, set_pwm_freq, 1);
static SENSOR_DEVICE_ATTR(pwm2_mode, S_IRUGO, show_pwm_mode, NULL, 1);
static SENSOR_DEVICE_ATTR(pwm3, S_IRUGO, show_pwm, set_pwm, 2);
static SENSOR_DEVICE_ATTR(pwm3_enable, S_IRUGO | S_IWUSR,
                          show_pwm_enable, set_pwm_enable, 2);
static SENSOR_DEVICE_ATTR(pwm3_freq, S_IRUGO | S_IWUSR,
                          show_pwm_freq, set_pwm_freq, 2);
static SENSOR_DEVICE_ATTR(pwm3_mode, S_IRUGO, show_pwm_mode, NULL, 2);

static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_temp, S_IRUGO | S_IWUSR,
                            show_pwm_auto_point_temp, set_pwm_auto_point_temp,
                            0, 0);
static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_fan, S_IRUGO | S_IWUSR,
                            show_pwm_auto_point_fan, set_pwm_auto_point_fan,
                            0, 0);
static SENSOR_DEVICE_ATTR_2(pwm1_auto_point2_temp, S_IRUGO | S_IWUSR,
                            show_pwm_auto_point_temp, set_pwm_auto_point_temp,
                            0, 1);
static SENSOR_DEVICE_ATTR_2(pwm1_auto_point2_fan, S_IRUGO | S_IWUSR,
                            show_pwm_auto_point_fan, set_pwm_auto_point_fan,
                            0, 1);
static SENSOR_DEVICE_ATTR_2(pwm1_auto_point3_temp, S_IRUGO | S_IWUSR,
                            show_pwm_auto_point_temp, set_pwm_auto_point_temp,
                            0, 2);
static SENSOR_DEVICE_ATTR_2(pwm1_auto_point3_fan, S_IRUGO | S_IWUSR,
                            show_pwm_auto_point_fan, set_pwm_auto_point_fan,
                            0, 2);

static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_temp, S_IRUGO | S_IWUSR,
                            show_pwm_auto_point_temp, set_pwm_auto_point_temp,
                            1, 0);
static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_fan, S_IRUGO | S_IWUSR,
                            show_pwm_auto_point_fan, set_pwm_auto_point_fan,
                            1, 0);
static SENSOR_DEVICE_ATTR_2(pwm2_auto_point2_temp, S_IRUGO | S_IWUSR,
                            show_pwm_auto_point_temp, set_pwm_auto_point_temp,
                            1, 1);
static SENSOR_DEVICE_ATTR_2(pwm2_auto_point2_fan, S_IRUGO | S_IWUSR,
                            show_pwm_auto_point_fan, set_pwm_auto_point_fan,
                            1, 1);
static SENSOR_DEVICE_ATTR_2(pwm2_auto_point3_temp, S_IRUGO | S_IWUSR,
                            show_pwm_auto_point_temp, set_pwm_auto_point_temp,
                            1, 2);
static SENSOR_DEVICE_ATTR_2(pwm2_auto_point3_fan, S_IRUGO | S_IWUSR,
                            show_pwm_auto_point_fan, set_pwm_auto_point_fan,
                            1, 2);

static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_temp, S_IRUGO | S_IWUSR,
                            show_pwm_auto_point_temp, set_pwm_auto_point_temp,
                            2, 0);
static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_fan, S_IRUGO | S_IWUSR,
                            show_pwm_auto_point_fan, set_pwm_auto_point_fan,
                            2, 0);
static SENSOR_DEVICE_ATTR_2(pwm3_auto_point2_temp, S_IRUGO | S_IWUSR,
                            show_pwm_auto_point_temp, set_pwm_auto_point_temp,
                            2, 1);
static SENSOR_DEVICE_ATTR_2(pwm3_auto_point2_fan, S_IRUGO | S_IWUSR,
                            show_pwm_auto_point_fan, set_pwm_auto_point_fan,
                            2, 1);
static SENSOR_DEVICE_ATTR_2(pwm3_auto_point3_temp, S_IRUGO | S_IWUSR,
                            show_pwm_auto_point_temp, set_pwm_auto_point_temp,
                            2, 2);
static SENSOR_DEVICE_ATTR_2(pwm3_auto_point3_fan, S_IRUGO | S_IWUSR,
                            show_pwm_auto_point_fan, set_pwm_auto_point_fan,
                            2, 2);

static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 4);
static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 5);
static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 6);
static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 7);
static SENSOR_DEVICE_ATTR(in8_alarm, S_IRUGO, show_alarm, NULL, 8);
static SENSOR_DEVICE_ATTR(in9_alarm, S_IRUGO, show_alarm, NULL, 9);
static SENSOR_DEVICE_ATTR(in10_alarm, S_IRUGO, show_alarm, NULL, 10);
static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 11);
static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 12);
static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 13);
static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 16);
static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 17);
static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 18);
static DEVICE_ATTR_RO(alarms_in);
static DEVICE_ATTR_RO(alarms_fan);
static DEVICE_ATTR_RO(alarms_temp);

static DEVICE_ATTR_RO(name);

static struct attribute *f71805f_attributes[] = {
        &sensor_dev_attr_in0_input.dev_attr.attr,
        &sensor_dev_attr_in0_max.dev_attr.attr,
        &sensor_dev_attr_in0_min.dev_attr.attr,
        &sensor_dev_attr_in1_input.dev_attr.attr,
        &sensor_dev_attr_in1_max.dev_attr.attr,
        &sensor_dev_attr_in1_min.dev_attr.attr,
        &sensor_dev_attr_in2_input.dev_attr.attr,
        &sensor_dev_attr_in2_max.dev_attr.attr,
        &sensor_dev_attr_in2_min.dev_attr.attr,
        &sensor_dev_attr_in3_input.dev_attr.attr,
        &sensor_dev_attr_in3_max.dev_attr.attr,
        &sensor_dev_attr_in3_min.dev_attr.attr,
        &sensor_dev_attr_in5_input.dev_attr.attr,
        &sensor_dev_attr_in5_max.dev_attr.attr,
        &sensor_dev_attr_in5_min.dev_attr.attr,
        &sensor_dev_attr_in6_input.dev_attr.attr,
        &sensor_dev_attr_in6_max.dev_attr.attr,
        &sensor_dev_attr_in6_min.dev_attr.attr,
        &sensor_dev_attr_in7_input.dev_attr.attr,
        &sensor_dev_attr_in7_max.dev_attr.attr,
        &sensor_dev_attr_in7_min.dev_attr.attr,

        &sensor_dev_attr_fan1_input.dev_attr.attr,
        &sensor_dev_attr_fan1_min.dev_attr.attr,
        &sensor_dev_attr_fan1_alarm.dev_attr.attr,
        &sensor_dev_attr_fan1_target.dev_attr.attr,
        &sensor_dev_attr_fan2_input.dev_attr.attr,
        &sensor_dev_attr_fan2_min.dev_attr.attr,
        &sensor_dev_attr_fan2_alarm.dev_attr.attr,
        &sensor_dev_attr_fan2_target.dev_attr.attr,
        &sensor_dev_attr_fan3_input.dev_attr.attr,
        &sensor_dev_attr_fan3_min.dev_attr.attr,
        &sensor_dev_attr_fan3_alarm.dev_attr.attr,
        &sensor_dev_attr_fan3_target.dev_attr.attr,

        &sensor_dev_attr_pwm1.dev_attr.attr,
        &sensor_dev_attr_pwm1_enable.dev_attr.attr,
        &sensor_dev_attr_pwm1_mode.dev_attr.attr,
        &sensor_dev_attr_pwm2.dev_attr.attr,
        &sensor_dev_attr_pwm2_enable.dev_attr.attr,
        &sensor_dev_attr_pwm2_mode.dev_attr.attr,
        &sensor_dev_attr_pwm3.dev_attr.attr,
        &sensor_dev_attr_pwm3_enable.dev_attr.attr,
        &sensor_dev_attr_pwm3_mode.dev_attr.attr,

        &sensor_dev_attr_temp1_input.dev_attr.attr,
        &sensor_dev_attr_temp1_max.dev_attr.attr,
        &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
        &sensor_dev_attr_temp1_type.dev_attr.attr,
        &sensor_dev_attr_temp2_input.dev_attr.attr,
        &sensor_dev_attr_temp2_max.dev_attr.attr,
        &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
        &sensor_dev_attr_temp2_type.dev_attr.attr,
        &sensor_dev_attr_temp3_input.dev_attr.attr,
        &sensor_dev_attr_temp3_max.dev_attr.attr,
        &sensor_dev_attr_temp3_max_hyst.dev_attr.attr,
        &sensor_dev_attr_temp3_type.dev_attr.attr,

        &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
        &sensor_dev_attr_pwm1_auto_point1_fan.dev_attr.attr,
        &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
        &sensor_dev_attr_pwm1_auto_point2_fan.dev_attr.attr,
        &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
        &sensor_dev_attr_pwm1_auto_point3_fan.dev_attr.attr,
        &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
        &sensor_dev_attr_pwm2_auto_point1_fan.dev_attr.attr,
        &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
        &sensor_dev_attr_pwm2_auto_point2_fan.dev_attr.attr,
        &sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr,
        &sensor_dev_attr_pwm2_auto_point3_fan.dev_attr.attr,
        &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
        &sensor_dev_attr_pwm3_auto_point1_fan.dev_attr.attr,
        &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
        &sensor_dev_attr_pwm3_auto_point2_fan.dev_attr.attr,
        &sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr,
        &sensor_dev_attr_pwm3_auto_point3_fan.dev_attr.attr,

        &sensor_dev_attr_in0_alarm.dev_attr.attr,
        &sensor_dev_attr_in1_alarm.dev_attr.attr,
        &sensor_dev_attr_in2_alarm.dev_attr.attr,
        &sensor_dev_attr_in3_alarm.dev_attr.attr,
        &sensor_dev_attr_in5_alarm.dev_attr.attr,
        &sensor_dev_attr_in6_alarm.dev_attr.attr,
        &sensor_dev_attr_in7_alarm.dev_attr.attr,
        &dev_attr_alarms_in.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,
        &dev_attr_alarms_temp.attr,
        &dev_attr_alarms_fan.attr,

        &dev_attr_name.attr,
        NULL
};

static const struct attribute_group f71805f_group = {
        .attrs = f71805f_attributes,
};

static struct attribute *f71805f_attributes_optin[4][5] = {
        {
                &sensor_dev_attr_in4_input.dev_attr.attr,
                &sensor_dev_attr_in4_max.dev_attr.attr,
                &sensor_dev_attr_in4_min.dev_attr.attr,
                &sensor_dev_attr_in4_alarm.dev_attr.attr,
                NULL
        }, {
                &sensor_dev_attr_in8_input.dev_attr.attr,
                &sensor_dev_attr_in8_max.dev_attr.attr,
                &sensor_dev_attr_in8_min.dev_attr.attr,
                &sensor_dev_attr_in8_alarm.dev_attr.attr,
                NULL
        }, {
                &sensor_dev_attr_in9_input.dev_attr.attr,
                &sensor_dev_attr_in9_max.dev_attr.attr,
                &sensor_dev_attr_in9_min.dev_attr.attr,
                &sensor_dev_attr_in9_alarm.dev_attr.attr,
                NULL
        }, {
                &sensor_dev_attr_in10_input.dev_attr.attr,
                &sensor_dev_attr_in10_max.dev_attr.attr,
                &sensor_dev_attr_in10_min.dev_attr.attr,
                &sensor_dev_attr_in10_alarm.dev_attr.attr,
                NULL
        }
};

static const struct attribute_group f71805f_group_optin[4] = {
        { .attrs = f71805f_attributes_optin[0] },
        { .attrs = f71805f_attributes_optin[1] },
        { .attrs = f71805f_attributes_optin[2] },
        { .attrs = f71805f_attributes_optin[3] },
};

/*
 * We don't include pwm_freq files in the arrays above, because they must be
 * created conditionally (only if pwm_mode is 1 == PWM)
 */
static struct attribute *f71805f_attributes_pwm_freq[] = {
        &sensor_dev_attr_pwm1_freq.dev_attr.attr,
        &sensor_dev_attr_pwm2_freq.dev_attr.attr,
        &sensor_dev_attr_pwm3_freq.dev_attr.attr,
        NULL
};

static const struct attribute_group f71805f_group_pwm_freq = {
        .attrs = f71805f_attributes_pwm_freq,
};

/* We also need an indexed access to pwmN files to toggle writability */
static struct attribute *f71805f_attr_pwm[] = {
        &sensor_dev_attr_pwm1.dev_attr.attr,
        &sensor_dev_attr_pwm2.dev_attr.attr,
        &sensor_dev_attr_pwm3.dev_attr.attr,
};

/*
 * Device registration and initialization
 */

static void f71805f_init_device(struct f71805f_data *data)
{
        u8 reg;
        int i;

        reg = f71805f_read8(data, F71805F_REG_START);
        if ((reg & 0x41) != 0x01) {
                pr_debug("Starting monitoring operations\n");
                f71805f_write8(data, F71805F_REG_START, (reg | 0x01) & ~0x40);
        }

        /*
         * Fan monitoring can be disabled. If it is, we won't be polling
         * the register values, and won't create the related sysfs files.
         */
        for (i = 0; i < 3; i++) {
                data->fan_ctrl[i] = f71805f_read8(data,
                                                  F71805F_REG_FAN_CTRL(i));
                /*
                 * Clear latch full bit, else "speed mode" fan speed control
                 * doesn't work
                 */
                if (data->fan_ctrl[i] & FAN_CTRL_LATCH_FULL) {
                        data->fan_ctrl[i] &= ~FAN_CTRL_LATCH_FULL;
                        f71805f_write8(data, F71805F_REG_FAN_CTRL(i),
                                       data->fan_ctrl[i]);
                }
        }
}

static int f71805f_probe(struct platform_device *pdev)
{
        struct f71805f_sio_data *sio_data = dev_get_platdata(&pdev->dev);
        struct f71805f_data *data;
        struct resource *res;
        int i, err;

        static const char * const names[] = {
                "f71805f",
                "f71872f",
        };

        data = devm_kzalloc(&pdev->dev, sizeof(struct f71805f_data),
                            GFP_KERNEL);
        if (!data)
                return -ENOMEM;

        res = platform_get_resource(pdev, IORESOURCE_IO, 0);
        if (!devm_request_region(&pdev->dev, res->start + ADDR_REG_OFFSET, 2,
                                 DRVNAME)) {
                dev_err(&pdev->dev, "Failed to request region 0x%lx-0x%lx\n",
                        (unsigned long)(res->start + ADDR_REG_OFFSET),
                        (unsigned long)(res->start + ADDR_REG_OFFSET + 1));
                return -EBUSY;
        }
        data->addr = res->start;
        data->name = names[sio_data->kind];
        mutex_init(&data->update_lock);

        platform_set_drvdata(pdev, data);

        /* Some voltage inputs depend on chip model and configuration */
        switch (sio_data->kind) {
        case f71805f:
                data->has_in = 0x1ff;
                break;
        case f71872f:
                data->has_in = 0x6ef;
                if (sio_data->fnsel1 & 0x01)
                        data->has_in |= (1 << 4); /* in4 */
                if (sio_data->fnsel1 & 0x02)
                        data->has_in |= (1 << 8); /* in8 */
                break;
        }

        /* Initialize the F71805F chip */
        f71805f_init_device(data);

        /* Register sysfs interface files */
        err = sysfs_create_group(&pdev->dev.kobj, &f71805f_group);
        if (err)
                return err;
        if (data->has_in & (1 << 4)) { /* in4 */
                err = sysfs_create_group(&pdev->dev.kobj,
                                         &f71805f_group_optin[0]);
                if (err)
                        goto exit_remove_files;
        }
        if (data->has_in & (1 << 8)) { /* in8 */
                err = sysfs_create_group(&pdev->dev.kobj,
                                         &f71805f_group_optin[1]);
                if (err)
                        goto exit_remove_files;
        }
        if (data->has_in & (1 << 9)) { /* in9 (F71872F/FG only) */
                err = sysfs_create_group(&pdev->dev.kobj,
                                         &f71805f_group_optin[2]);
                if (err)
                        goto exit_remove_files;
        }
        if (data->has_in & (1 << 10)) { /* in9 (F71872F/FG only) */
                err = sysfs_create_group(&pdev->dev.kobj,
                                         &f71805f_group_optin[3]);
                if (err)
                        goto exit_remove_files;
        }
        for (i = 0; i < 3; i++) {
                /* If control mode is PWM, create pwm_freq file */
                if (!(data->fan_ctrl[i] & FAN_CTRL_DC_MODE)) {
                        err = sysfs_create_file(&pdev->dev.kobj,
                                                f71805f_attributes_pwm_freq[i]);
                        if (err)
                                goto exit_remove_files;
                }
                /* If PWM is in manual mode, add write permission */
                if (data->fan_ctrl[i] & FAN_CTRL_MODE_MANUAL) {
                        err = sysfs_chmod_file(&pdev->dev.kobj,
                                               f71805f_attr_pwm[i],
                                               S_IRUGO | S_IWUSR);
                        if (err) {
                                dev_err(&pdev->dev, "chmod +w pwm%d failed\n",
                                        i + 1);
                                goto exit_remove_files;
                        }
                }
        }

        data->hwmon_dev = hwmon_device_register(&pdev->dev);
        if (IS_ERR(data->hwmon_dev)) {
                err = PTR_ERR(data->hwmon_dev);
                dev_err(&pdev->dev, "Class registration failed (%d)\n", err);
                goto exit_remove_files;
        }

        return 0;

exit_remove_files:
        sysfs_remove_group(&pdev->dev.kobj, &f71805f_group);
        for (i = 0; i < 4; i++)
                sysfs_remove_group(&pdev->dev.kobj, &f71805f_group_optin[i]);
        sysfs_remove_group(&pdev->dev.kobj, &f71805f_group_pwm_freq);
        return err;
}

static int f71805f_remove(struct platform_device *pdev)
{
        struct f71805f_data *data = platform_get_drvdata(pdev);
        int i;

        hwmon_device_unregister(data->hwmon_dev);
        sysfs_remove_group(&pdev->dev.kobj, &f71805f_group);
        for (i = 0; i < 4; i++)
                sysfs_remove_group(&pdev->dev.kobj, &f71805f_group_optin[i]);
        sysfs_remove_group(&pdev->dev.kobj, &f71805f_group_pwm_freq);

        return 0;
}

static struct platform_driver f71805f_driver = {
        .driver = {
                .name   = DRVNAME,
        },
        .probe          = f71805f_probe,
        .remove         = f71805f_remove,
};

static int __init f71805f_device_add(unsigned short address,
                                     const struct f71805f_sio_data *sio_data)
{
        struct resource res = {
                .start  = address,
                .end    = address + REGION_LENGTH - 1,
                .flags  = IORESOURCE_IO,
        };
        int err;

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

        res.name = pdev->name;
        err = acpi_check_resource_conflict(&res);
        if (err)
                goto exit_device_put;

        err = platform_device_add_resources(pdev, &res, 1);
        if (err) {
                pr_err("Device resource addition failed (%d)\n", err);
                goto exit_device_put;
        }

        err = platform_device_add_data(pdev, sio_data,
                                       sizeof(struct f71805f_sio_data));
        if (err) {
                pr_err("Platform data allocation failed\n");
                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 f71805f_find(int sioaddr, unsigned short *address,
                               struct f71805f_sio_data *sio_data)
{
        int err = -ENODEV;
        u16 devid;

        static const char * const names[] = {
                "F71805F/FG",
                "F71872F/FG or F71806F/FG",
        };

        superio_enter(sioaddr);

        devid = superio_inw(sioaddr, SIO_REG_MANID);
        if (devid != SIO_FINTEK_ID)
                goto exit;

        devid = force_id ? force_id : superio_inw(sioaddr, SIO_REG_DEVID);
        switch (devid) {
        case SIO_F71805F_ID:
                sio_data->kind = f71805f;
                break;
        case SIO_F71872F_ID:
                sio_data->kind = f71872f;
                sio_data->fnsel1 = superio_inb(sioaddr, SIO_REG_FNSEL1);
                break;
        default:
                pr_info("Unsupported Fintek device, skipping\n");
                goto exit;
        }

        superio_select(sioaddr, F71805F_LD_HWM);
        if (!(superio_inb(sioaddr, SIO_REG_ENABLE) & 0x01)) {
                pr_warn("Device not activated, skipping\n");
                goto exit;
        }

        *address = superio_inw(sioaddr, SIO_REG_ADDR);
        if (*address == 0) {
                pr_warn("Base address not set, skipping\n");
                goto exit;
        }
        *address &= ~(REGION_LENGTH - 1);       /* Ignore 3 LSB */

        err = 0;
        pr_info("Found %s chip at %#x, revision %u\n",
                names[sio_data->kind], *address,
                superio_inb(sioaddr, SIO_REG_DEVREV));

exit:
        superio_exit(sioaddr);
        return err;
}

static int __init f71805f_init(void)
{
        int err;
        unsigned short address;
        struct f71805f_sio_data sio_data;

        if (f71805f_find(0x2e, &address, &sio_data)
         && f71805f_find(0x4e, &address, &sio_data))
                return -ENODEV;

        err = platform_driver_register(&f71805f_driver);
        if (err)
                goto exit;

        /* Sets global pdev as a side effect */
        err = f71805f_device_add(address, &sio_data);
        if (err)
                goto exit_driver;

        return 0;

exit_driver:
        platform_driver_unregister(&f71805f_driver);
exit:
        return err;
}

static void __exit f71805f_exit(void)
{
        platform_device_unregister(pdev);
        platform_driver_unregister(&f71805f_driver);
}

MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("F71805F/F71872F hardware monitoring driver");

module_init(f71805f_init);
module_exit(f71805f_exit);