/*
 *  pc87360.c - Part of lm_sensors, Linux kernel modules
 *              for hardware monitoring
 *  Copyright (C) 2004, 2007 Jean Delvare <khali@linux-fr.org>
 *
 *  Copied from smsc47m1.c:
 *  Copyright (C) 2002 Mark D. Studebaker <mdsxyz123@yahoo.com>
 *
 *  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.
 *
 *  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).
 */

#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 <asm/io.h>

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");

/*
 * 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 */
static const u8 logdev[3] = { 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;
	char valid;		/* !=0 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 */
};

/*
 * Functions declaration
 */

static int pc87360_probe(struct platform_device *pdev);
static int __devexit pc87360_remove(struct platform_device *pdev);

static int pc87360_read_value(struct pc87360_data *data, u8 ldi, u8 bank,
			      u8 reg);
static void pc87360_write_value(struct pc87360_data *data, u8 ldi, u8 bank,
				u8 reg, u8 value);
static void pc87360_init_device(struct platform_device *pdev,
				int use_thermistors);
static struct pc87360_data *pc87360_update_device(struct device *dev);

/*
 * Driver data
 */

static struct platform_driver pc87360_driver = {
	.driver = {
		.owner	= THIS_MODULE,
		.name	= "pc87360",
	},
	.probe		= pc87360_probe,
	.remove		= __devexit_p(pc87360_remove),
};

/*
 * Sysfs stuff
 */

static ssize_t show_fan_input(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 ssize_t show_fan_min(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 show_fan_div(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 ssize_t show_fan_status(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 ssize_t set_fan_min(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 = simple_strtol(buf, NULL, 10);

	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_input[] = {
	SENSOR_ATTR(fan1_input, S_IRUGO, show_fan_input, NULL, 0),
	SENSOR_ATTR(fan2_input, S_IRUGO, show_fan_input, NULL, 1),
	SENSOR_ATTR(fan3_input, S_IRUGO, show_fan_input, NULL, 2),
};
static struct sensor_device_attribute fan_status[] = {
	SENSOR_ATTR(fan1_status, S_IRUGO, show_fan_status, NULL, 0),
	SENSOR_ATTR(fan2_status, S_IRUGO, show_fan_status, NULL, 1),
	SENSOR_ATTR(fan3_status, S_IRUGO, show_fan_status, NULL, 2),
};
static struct sensor_device_attribute fan_div[] = {
	SENSOR_ATTR(fan1_div, S_IRUGO, show_fan_div, NULL, 0),
	SENSOR_ATTR(fan2_div, S_IRUGO, show_fan_div, NULL, 1),
	SENSOR_ATTR(fan3_div, S_IRUGO, show_fan_div, NULL, 2),
};
static struct sensor_device_attribute fan_min[] = {
	SENSOR_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min, set_fan_min, 0),
	SENSOR_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min, set_fan_min, 1),
	SENSOR_ATTR(fan3_min, S_IWUSR | S_IRUGO, show_fan_min, set_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

static ssize_t show_pwm(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 set_pwm(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 = simple_strtol(buf, NULL, 10);

	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(pwm1, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 0),
	SENSOR_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 1),
	SENSOR_ATTR(pwm3, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 2),
};

static struct attribute * pc8736x_fan_attr_array[] = {
	FAN_UNIT_ATTRS(0),
	FAN_UNIT_ATTRS(1),
	FAN_UNIT_ATTRS(2),
	&pwm[0].dev_attr.attr,
	&pwm[1].dev_attr.attr,
	&pwm[2].dev_attr.attr,
	NULL
};
static const struct attribute_group pc8736x_fan_group = {
	.attrs = pc8736x_fan_attr_array,
};

static ssize_t show_in_input(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 ssize_t show_in_min(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 show_in_max(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 show_in_status(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 ssize_t set_in_min(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 = simple_strtol(buf, NULL, 10);

	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 ssize_t set_in_max(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 = simple_strtol(buf, NULL, 10);

	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_input[] = {
	SENSOR_ATTR(in0_input, S_IRUGO, show_in_input, NULL, 0),
	SENSOR_ATTR(in1_input, S_IRUGO, show_in_input, NULL, 1),
	SENSOR_ATTR(in2_input, S_IRUGO, show_in_input, NULL, 2),
	SENSOR_ATTR(in3_input, S_IRUGO, show_in_input, NULL, 3),
	SENSOR_ATTR(in4_input, S_IRUGO, show_in_input, NULL, 4),
	SENSOR_ATTR(in5_input, S_IRUGO, show_in_input, NULL, 5),
	SENSOR_ATTR(in6_input, S_IRUGO, show_in_input, NULL, 6),
	SENSOR_ATTR(in7_input, S_IRUGO, show_in_input, NULL, 7),
	SENSOR_ATTR(in8_input, S_IRUGO, show_in_input, NULL, 8),
	SENSOR_ATTR(in9_input, S_IRUGO, show_in_input, NULL, 9),
	SENSOR_ATTR(in10_input, S_IRUGO, show_in_input, NULL, 10),
};
static struct sensor_device_attribute in_status[] = {
	SENSOR_ATTR(in0_status, S_IRUGO, show_in_status, NULL, 0),
	SENSOR_ATTR(in1_status, S_IRUGO, show_in_status, NULL, 1),
	SENSOR_ATTR(in2_status, S_IRUGO, show_in_status, NULL, 2),
	SENSOR_ATTR(in3_status, S_IRUGO, show_in_status, NULL, 3),
	SENSOR_ATTR(in4_status, S_IRUGO, show_in_status, NULL, 4),
	SENSOR_ATTR(in5_status, S_IRUGO, show_in_status, NULL, 5),
	SENSOR_ATTR(in6_status, S_IRUGO, show_in_status, NULL, 6),
	SENSOR_ATTR(in7_status, S_IRUGO, show_in_status, NULL, 7),
	SENSOR_ATTR(in8_status, S_IRUGO, show_in_status, NULL, 8),
	SENSOR_ATTR(in9_status, S_IRUGO, show_in_status, NULL, 9),
	SENSOR_ATTR(in10_status, S_IRUGO, show_in_status, NULL, 10),
};
static struct sensor_device_attribute in_min[] = {
	SENSOR_ATTR(in0_min, S_IWUSR | S_IRUGO, show_in_min, set_in_min, 0),
	SENSOR_ATTR(in1_min, S_IWUSR | S_IRUGO, show_in_min, set_in_min, 1),
	SENSOR_ATTR(in2_min, S_IWUSR | S_IRUGO, show_in_min, set_in_min, 2),
	SENSOR_ATTR(in3_min, S_IWUSR | S_IRUGO, show_in_min, set_in_min, 3),
	SENSOR_ATTR(in4_min, S_IWUSR | S_IRUGO, show_in_min, set_in_min, 4),
	SENSOR_ATTR(in5_min, S_IWUSR | S_IRUGO, show_in_min, set_in_min, 5),
	SENSOR_ATTR(in6_min, S_IWUSR | S_IRUGO, show_in_min, set_in_min, 6),
	SENSOR_ATTR(in7_min, S_IWUSR | S_IRUGO, show_in_min, set_in_min, 7),
	SENSOR_ATTR(in8_min, S_IWUSR | S_IRUGO, show_in_min, set_in_min, 8),
	SENSOR_ATTR(in9_min, S_IWUSR | S_IRUGO, show_in_min, set_in_min, 9),
	SENSOR_ATTR(in10_min, S_IWUSR | S_IRUGO, show_in_min, set_in_min, 10),
};
static struct sensor_device_attribute in_max[] = {
	SENSOR_ATTR(in0_max, S_IWUSR | S_IRUGO, show_in_max, set_in_max, 0),
	SENSOR_ATTR(in1_max, S_IWUSR | S_IRUGO, show_in_max, set_in_max, 1),
	SENSOR_ATTR(in2_max, S_IWUSR | S_IRUGO, show_in_max, set_in_max, 2),
	SENSOR_ATTR(in3_max, S_IWUSR | S_IRUGO, show_in_max, set_in_max, 3),
	SENSOR_ATTR(in4_max, S_IWUSR | S_IRUGO, show_in_max, set_in_max, 4),
	SENSOR_ATTR(in5_max, S_IWUSR | S_IRUGO, show_in_max, set_in_max, 5),
	SENSOR_ATTR(in6_max, S_IWUSR | S_IRUGO, show_in_max, set_in_max, 6),
	SENSOR_ATTR(in7_max, S_IWUSR | S_IRUGO, show_in_max, set_in_max, 7),
	SENSOR_ATTR(in8_max, S_IWUSR | S_IRUGO, show_in_max, set_in_max, 8),
	SENSOR_ATTR(in9_max, S_IWUSR | S_IRUGO, show_in_max, set_in_max, 9),
	SENSOR_ATTR(in10_max, S_IWUSR | S_IRUGO, show_in_max, set_in_max, 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

static ssize_t show_vid(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(cpu0_vid, S_IRUGO, show_vid, NULL);

static ssize_t show_vrm(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 set_vrm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
	struct pc87360_data *data = dev_get_drvdata(dev);
	data->vrm = simple_strtoul(buf, NULL, 10);
	return count;
}
static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);

static ssize_t show_in_alarms(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(alarms_in, S_IRUGO, show_in_alarms, NULL);

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 show_therm_input(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 ssize_t show_therm_min(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 show_therm_max(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 show_therm_crit(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 show_therm_status(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 ssize_t set_therm_min(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 = simple_strtol(buf, NULL, 10);

	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 ssize_t set_therm_max(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 = simple_strtol(buf, NULL, 10);

	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 ssize_t set_therm_crit(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 = simple_strtol(buf, NULL, 10);

	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;
}

/* 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(temp4_input, S_IRUGO, show_therm_input, NULL, 0+11),
	SENSOR_ATTR(temp5_input, S_IRUGO, show_therm_input, NULL, 1+11),
	SENSOR_ATTR(temp6_input, S_IRUGO, show_therm_input, NULL, 2+11),
};
static struct sensor_device_attribute therm_status[] = {
	SENSOR_ATTR(temp4_status, S_IRUGO, show_therm_status, NULL, 0+11),
	SENSOR_ATTR(temp5_status, S_IRUGO, show_therm_status, NULL, 1+11),
	SENSOR_ATTR(temp6_status, S_IRUGO, show_therm_status, NULL, 2+11),
};
static struct sensor_device_attribute therm_min[] = {
	SENSOR_ATTR(temp4_min, S_IRUGO | S_IWUSR,
		    show_therm_min, set_therm_min, 0+11),
	SENSOR_ATTR(temp5_min, S_IRUGO | S_IWUSR,
		    show_therm_min, set_therm_min, 1+11),
	SENSOR_ATTR(temp6_min, S_IRUGO | S_IWUSR,
		    show_therm_min, set_therm_min, 2+11),
};
static struct sensor_device_attribute therm_max[] = {
	SENSOR_ATTR(temp4_max, S_IRUGO | S_IWUSR,
		    show_therm_max, set_therm_max, 0+11),
	SENSOR_ATTR(temp5_max, S_IRUGO | S_IWUSR,
		    show_therm_max, set_therm_max, 1+11),
	SENSOR_ATTR(temp6_max, S_IRUGO | S_IWUSR,
		    show_therm_max, set_therm_max, 2+11),
};
static struct sensor_device_attribute therm_crit[] = {
	SENSOR_ATTR(temp4_crit, S_IRUGO | S_IWUSR,
		    show_therm_crit, set_therm_crit, 0+11),
	SENSOR_ATTR(temp5_crit, S_IRUGO | S_IWUSR,
		    show_therm_crit, set_therm_crit, 1+11),
	SENSOR_ATTR(temp6_crit, S_IRUGO | S_IWUSR,
		    show_therm_crit, set_therm_crit, 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

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 show_temp_input(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 ssize_t show_temp_min(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 show_temp_max(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 show_temp_crit(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 show_temp_status(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 ssize_t set_temp_min(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 = simple_strtol(buf, NULL, 10);

	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 ssize_t set_temp_max(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 = simple_strtol(buf, NULL, 10);

	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 ssize_t set_temp_crit(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 = simple_strtol(buf, NULL, 10);

	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_input[] = {
	SENSOR_ATTR(temp1_input, S_IRUGO, show_temp_input, NULL, 0),
	SENSOR_ATTR(temp2_input, S_IRUGO, show_temp_input, NULL, 1),
	SENSOR_ATTR(temp3_input, S_IRUGO, show_temp_input, NULL, 2),
};
static struct sensor_device_attribute temp_status[] = {
	SENSOR_ATTR(temp1_status, S_IRUGO, show_temp_status, NULL, 0),
	SENSOR_ATTR(temp2_status, S_IRUGO, show_temp_status, NULL, 1),
	SENSOR_ATTR(temp3_status, S_IRUGO, show_temp_status, NULL, 2),
};
static struct sensor_device_attribute temp_min[] = {
	SENSOR_ATTR(temp1_min, S_IRUGO | S_IWUSR,
		    show_temp_min, set_temp_min, 0),
	SENSOR_ATTR(temp2_min, S_IRUGO | S_IWUSR,
		    show_temp_min, set_temp_min, 1),
	SENSOR_ATTR(temp3_min, S_IRUGO | S_IWUSR,
		    show_temp_min, set_temp_min, 2),
};
static struct sensor_device_attribute temp_max[] = {
	SENSOR_ATTR(temp1_max, S_IRUGO | S_IWUSR,
		    show_temp_max, set_temp_max, 0),
	SENSOR_ATTR(temp2_max, S_IRUGO | S_IWUSR,
		    show_temp_max, set_temp_max, 1),
	SENSOR_ATTR(temp3_max, S_IRUGO | S_IWUSR,
		    show_temp_max, set_temp_max, 2),
};
static struct sensor_device_attribute temp_crit[] = {
	SENSOR_ATTR(temp1_crit, S_IRUGO | S_IWUSR,
		    show_temp_crit, set_temp_crit, 0),
	SENSOR_ATTR(temp2_crit, S_IRUGO | S_IWUSR,
		    show_temp_crit, set_temp_crit, 1),
	SENSOR_ATTR(temp3_crit, S_IRUGO | S_IWUSR,
		    show_temp_crit, set_temp_crit, 2),
};

static ssize_t show_temp_alarms(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(alarms_temp, S_IRUGO, show_temp_alarms, NULL);

#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

static struct attribute * pc8736x_temp_attr_array[] = {
	TEMP_UNIT_ATTRS(0),
	TEMP_UNIT_ATTRS(1),
	TEMP_UNIT_ATTRS(2),
	/* include the few miscellaneous atts here */
	&dev_attr_alarms_temp.attr,
	NULL
};
static const struct attribute_group pc8736x_temp_group = {
	.attrs = pc8736x_temp_attr_array,
};

static ssize_t show_name(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(name, S_IRUGO, show_name, NULL);

/*
 * 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 = superio_inb(sioaddr, DEVID);
	switch (val) {
	case 0xE1: /* PC87360 */
	case 0xE8: /* PC87363 */
	case 0xE4: /* PC87364 */