/*

   * f75375s.c - driver for the Fintek F75375/SP, F75373 and
   *             F75387SG/RG hardware monitoring features

   * Copyright (C) 2006-2007  Riku Voipio

   *
   * Datasheets available at:
   *
   * f75375:

   * http://www.fintek.com.tw/files/productfiles/F75375_V026P.pdf

   *
   * f75373:

   * http://www.fintek.com.tw/files/productfiles/F75373_V025P.pdf

   *

   * f75387:
   * http://www.fintek.com.tw/files/productfiles/F75387_V027P.pdf
   *

   * 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.
   *
   */
  
  #include <linux/module.h>
  #include <linux/jiffies.h>
  #include <linux/hwmon.h>
  #include <linux/hwmon-sysfs.h>
  #include <linux/i2c.h>
  #include <linux/err.h>
  #include <linux/mutex.h>

  #include <linux/f75375s.h>

  #include <linux/slab.h>

  
  /* Addresses to scan */

  static const unsigned short normal_i2c[] = { 0x2d, 0x2e, I2C_CLIENT_END };

  enum chips { f75373, f75375, f75387 };

  
  /* Fintek F75375 registers  */
  #define F75375_REG_CONFIG0		0x0
  #define F75375_REG_CONFIG1		0x1
  #define F75375_REG_CONFIG2		0x2
  #define F75375_REG_CONFIG3		0x3
  #define F75375_REG_ADDR			0x4
  #define F75375_REG_INTR			0x31
  #define F75375_CHIP_ID			0x5A
  #define F75375_REG_VERSION		0x5C
  #define F75375_REG_VENDOR		0x5D
  #define F75375_REG_FAN_TIMER		0x60
  
  #define F75375_REG_VOLT(nr)		(0x10 + (nr))
  #define F75375_REG_VOLT_HIGH(nr)	(0x20 + (nr) * 2)
  #define F75375_REG_VOLT_LOW(nr)		(0x21 + (nr) * 2)
  
  #define F75375_REG_TEMP(nr)		(0x14 + (nr))

  #define F75387_REG_TEMP11_LSB(nr)	(0x1a + (nr))

  #define F75375_REG_TEMP_HIGH(nr)	(0x28 + (nr) * 2)
  #define F75375_REG_TEMP_HYST(nr)	(0x29 + (nr) * 2)
  
  #define F75375_REG_FAN(nr)		(0x16 + (nr) * 2)
  #define F75375_REG_FAN_MIN(nr)		(0x2C + (nr) * 2)
  #define F75375_REG_FAN_FULL(nr)		(0x70 + (nr) * 0x10)
  #define F75375_REG_FAN_PWM_DUTY(nr)	(0x76 + (nr) * 0x10)
  #define F75375_REG_FAN_PWM_CLOCK(nr)	(0x7D + (nr) * 0x10)
  
  #define F75375_REG_FAN_EXP(nr)		(0x74 + (nr) * 0x10)
  #define F75375_REG_FAN_B_TEMP(nr, step)	((0xA0 + (nr) * 0x10) + (step))
  #define F75375_REG_FAN_B_SPEED(nr, step) \
  	((0xA5 + (nr) * 0x10) + (step) * 2)
  
  #define F75375_REG_PWM1_RAISE_DUTY	0x69
  #define F75375_REG_PWM2_RAISE_DUTY	0x6A
  #define F75375_REG_PWM1_DROP_DUTY	0x6B
  #define F75375_REG_PWM2_DROP_DUTY	0x6C

  #define F75375_FAN_CTRL_LINEAR(nr)	(4 + nr)
  #define F75387_FAN_CTRL_LINEAR(nr)	(1 + ((nr) * 4))

  #define FAN_CTRL_MODE(nr)		(4 + ((nr) * 2))

  #define F75387_FAN_DUTY_MODE(nr)	(2 + ((nr) * 4))
  #define F75387_FAN_MANU_MODE(nr)	((nr) * 4)

  
  /*
   * Data structures and manipulation thereof
   */
  
  struct f75375_data {
  	unsigned short addr;

  	struct device *hwmon_dev;

  
  	const char *name;
  	int kind;
  	struct mutex update_lock; /* protect register access */
  	char valid;
  	unsigned long last_updated;	/* In jiffies */
  	unsigned long last_limits;	/* In jiffies */
  
  	/* Register values */
  	u8 in[4];
  	u8 in_max[4];
  	u8 in_min[4];
  	u16 fan[2];
  	u16 fan_min[2];

  	u16 fan_max[2];
  	u16 fan_target[2];

  	u8 fan_timer;
  	u8 pwm[2];
  	u8 pwm_mode[2];
  	u8 pwm_enable[2];

  	/*
  	 * f75387: For remote temperature reading, it uses signed 11-bit
  	 * values with LSB = 0.125 degree Celsius, left-justified in 16-bit
  	 * registers. For original 8-bit temp readings, the LSB just is 0.
  	 */
  	s16 temp11[2];

  	s8 temp_high[2];
  	s8 temp_max_hyst[2];
  };

  static int f75375_detect(struct i2c_client *client,

  			 struct i2c_board_info *info);

  static int f75375_probe(struct i2c_client *client,
  			const struct i2c_device_id *id);

  static int f75375_remove(struct i2c_client *client);

  static const struct i2c_device_id f75375_id[] = {
  	{ "f75373", f75373 },
  	{ "f75375", f75375 },

  	{ "f75387", f75387 },

  	{ }
  };
  MODULE_DEVICE_TABLE(i2c, f75375_id);

  static struct i2c_driver f75375_driver = {

  	.class = I2C_CLASS_HWMON,

  	.driver = {
  		.name = "f75375",
  	},
  	.probe = f75375_probe,
  	.remove = f75375_remove,

  	.id_table = f75375_id,

  	.detect = f75375_detect,

  	.address_list = normal_i2c,

  };

  static inline int f75375_read8(struct i2c_client *client, u8 reg)
  {
  	return i2c_smbus_read_byte_data(client, reg);
  }
  
  /* in most cases, should be called while holding update_lock */
  static inline u16 f75375_read16(struct i2c_client *client, u8 reg)
  {

  	return (i2c_smbus_read_byte_data(client, reg) << 8)
  		| i2c_smbus_read_byte_data(client, reg + 1);

  }
  
  static inline void f75375_write8(struct i2c_client *client, u8 reg,
  		u8 value)
  {
  	i2c_smbus_write_byte_data(client, reg, value);
  }
  
  static inline void f75375_write16(struct i2c_client *client, u8 reg,
  		u16 value)
  {
  	int err = i2c_smbus_write_byte_data(client, reg, (value << 8));
  	if (err)
  		return;
  	i2c_smbus_write_byte_data(client, reg + 1, (value & 0xFF));
  }
  
  static struct f75375_data *f75375_update_device(struct device *dev)
  {
  	struct i2c_client *client = to_i2c_client(dev);
  	struct f75375_data *data = i2c_get_clientdata(client);
  	int nr;
  
  	mutex_lock(&data->update_lock);
  
  	/* Limit registers cache is refreshed after 60 seconds */
  	if (time_after(jiffies, data->last_limits + 60 * HZ)
  		|| !data->valid) {
  		for (nr = 0; nr < 2; nr++) {
  			data->temp_high[nr] =
  				f75375_read8(client, F75375_REG_TEMP_HIGH(nr));
  			data->temp_max_hyst[nr] =
  				f75375_read8(client, F75375_REG_TEMP_HYST(nr));

  			data->fan_max[nr] =

  				f75375_read16(client, F75375_REG_FAN_FULL(nr));
  			data->fan_min[nr] =
  				f75375_read16(client, F75375_REG_FAN_MIN(nr));

  			data->fan_target[nr] =

  				f75375_read16(client, F75375_REG_FAN_EXP(nr));
  			data->pwm[nr] =	f75375_read8(client,
  				F75375_REG_FAN_PWM_DUTY(nr));
  
  		}
  		for (nr = 0; nr < 4; nr++) {
  			data->in_max[nr] =
  				f75375_read8(client, F75375_REG_VOLT_HIGH(nr));
  			data->in_min[nr] =
  				f75375_read8(client, F75375_REG_VOLT_LOW(nr));
  		}
  		data->fan_timer = f75375_read8(client, F75375_REG_FAN_TIMER);
  		data->last_limits = jiffies;
  	}
  
  	/* Measurement registers cache is refreshed after 2 second */
  	if (time_after(jiffies, data->last_updated + 2 * HZ)
  		|| !data->valid) {
  		for (nr = 0; nr < 2; nr++) {

  			/* assign MSB, therefore shift it by 8 bits */
  			data->temp11[nr] =
  				f75375_read8(client, F75375_REG_TEMP(nr)) << 8;
  			if (data->kind == f75387)
  				/* merge F75387's temperature LSB (11-bit) */
  				data->temp11[nr] |=
  					f75375_read8(client,
  						     F75387_REG_TEMP11_LSB(nr));

  			data->fan[nr] =
  				f75375_read16(client, F75375_REG_FAN(nr));
  		}
  		for (nr = 0; nr < 4; nr++)
  			data->in[nr] =
  				f75375_read8(client, F75375_REG_VOLT(nr));
  
  		data->last_updated = jiffies;
  		data->valid = 1;
  	}
  
  	mutex_unlock(&data->update_lock);
  	return data;
  }
  
  static inline u16 rpm_from_reg(u16 reg)
  {
  	if (reg == 0 || reg == 0xffff)
  		return 0;

  	return 1500000 / reg;

  }
  
  static inline u16 rpm_to_reg(int rpm)
  {
  	if (rpm < 367 || rpm > 0xffff)
  		return 0xffff;

  	return 1500000 / rpm;

  }
  
  static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
  		const char *buf, size_t count)
  {
  	int nr = to_sensor_dev_attr(attr)->index;
  	struct i2c_client *client = to_i2c_client(dev);
  	struct f75375_data *data = i2c_get_clientdata(client);

  	unsigned long val;
  	int err;
  
  	err = kstrtoul(buf, 10, &val);
  	if (err < 0)
  		return err;

  
  	mutex_lock(&data->update_lock);
  	data->fan_min[nr] = rpm_to_reg(val);
  	f75375_write16(client, F75375_REG_FAN_MIN(nr), data->fan_min[nr]);
  	mutex_unlock(&data->update_lock);
  	return count;
  }

  static ssize_t set_fan_target(struct device *dev, struct device_attribute *attr,

  		const char *buf, size_t count)
  {
  	int nr = to_sensor_dev_attr(attr)->index;
  	struct i2c_client *client = to_i2c_client(dev);
  	struct f75375_data *data = i2c_get_clientdata(client);

  	unsigned long val;
  	int err;
  
  	err = kstrtoul(buf, 10, &val);
  	if (err < 0)
  		return err;

  
  	mutex_lock(&data->update_lock);

  	data->fan_target[nr] = rpm_to_reg(val);
  	f75375_write16(client, F75375_REG_FAN_EXP(nr), data->fan_target[nr]);

  	mutex_unlock(&data->update_lock);
  	return count;
  }
  
  static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
  		const char *buf, size_t count)
  {
  	int nr = to_sensor_dev_attr(attr)->index;
  	struct i2c_client *client = to_i2c_client(dev);
  	struct f75375_data *data = i2c_get_clientdata(client);

  	unsigned long val;
  	int err;
  
  	err = kstrtoul(buf, 10, &val);
  	if (err < 0)
  		return err;

  
  	mutex_lock(&data->update_lock);
  	data->pwm[nr] = SENSORS_LIMIT(val, 0, 255);
  	f75375_write8(client, F75375_REG_FAN_PWM_DUTY(nr), data->pwm[nr]);
  	mutex_unlock(&data->update_lock);
  	return count;
  }
  
  static ssize_t show_pwm_enable(struct device *dev, struct device_attribute
  		*attr, char *buf)
  {
  	int nr = to_sensor_dev_attr(attr)->index;
  	struct f75375_data *data = f75375_update_device(dev);
  	return sprintf(buf, "%d
  ", data->pwm_enable[nr]);
  }

  static int set_pwm_enable_direct(struct i2c_client *client, int nr, int val)

  {

  	struct f75375_data *data = i2c_get_clientdata(client);

  	u8 fanmode;

  	if (val < 0 || val > 3)

  		return -EINVAL;

  	fanmode = f75375_read8(client, F75375_REG_FAN_TIMER);

  	if (data->kind == f75387) {
  		/* clear each fanX_mode bit before setting them properly */
  		fanmode &= ~(1 << F75387_FAN_DUTY_MODE(nr));
  		fanmode &= ~(1 << F75387_FAN_MANU_MODE(nr));
  		switch (val) {
  		case 0: /* full speed */
  			fanmode |= (1 << F75387_FAN_MANU_MODE(nr));
  			fanmode |= (1 << F75387_FAN_DUTY_MODE(nr));
  			data->pwm[nr] = 255;
  			f75375_write8(client, F75375_REG_FAN_PWM_DUTY(nr),
  					data->pwm[nr]);
  			break;
  		case 1: /* PWM */
  			fanmode  |= (1 << F75387_FAN_MANU_MODE(nr));
  			fanmode  |= (1 << F75387_FAN_DUTY_MODE(nr));
  			break;
  		case 2: /* AUTOMATIC*/
  			fanmode  |=  (1 << F75387_FAN_DUTY_MODE(nr));
  			break;
  		case 3: /* fan speed */
  			fanmode |= (1 << F75387_FAN_MANU_MODE(nr));
  			break;
  		}
  	} else {
  		/* clear each fanX_mode bit before setting them properly */
  		fanmode &= ~(3 << FAN_CTRL_MODE(nr));
  		switch (val) {
  		case 0: /* full speed */
  			fanmode  |= (3 << FAN_CTRL_MODE(nr));
  			data->pwm[nr] = 255;
  			f75375_write8(client, F75375_REG_FAN_PWM_DUTY(nr),
  					data->pwm[nr]);
  			break;
  		case 1: /* PWM */
  			fanmode  |= (3 << FAN_CTRL_MODE(nr));
  			break;
  		case 2: /* AUTOMATIC*/
  			fanmode  |= (2 << FAN_CTRL_MODE(nr));
  			break;
  		case 3: /* fan speed */
  			break;
  		}

  	}

  	f75375_write8(client, F75375_REG_FAN_TIMER, fanmode);
  	data->pwm_enable[nr] = val;

  	return 0;
  }
  
  static ssize_t set_pwm_enable(struct device *dev, struct device_attribute *attr,
  		const char *buf, size_t count)
  {
  	int nr = to_sensor_dev_attr(attr)->index;
  	struct i2c_client *client = to_i2c_client(dev);
  	struct f75375_data *data = i2c_get_clientdata(client);

  	unsigned long val;
  	int err;
  
  	err = kstrtoul(buf, 10, &val);
  	if (err < 0)
  		return err;

  
  	mutex_lock(&data->update_lock);
  	err = set_pwm_enable_direct(client, nr, val);

  	mutex_unlock(&data->update_lock);

  	return err ? err : count;

  }
  
  static ssize_t set_pwm_mode(struct device *dev, struct device_attribute *attr,
  		const char *buf, size_t count)
  {
  	int nr = to_sensor_dev_attr(attr)->index;
  	struct i2c_client *client = to_i2c_client(dev);
  	struct f75375_data *data = i2c_get_clientdata(client);

  	unsigned long val;
  	int err;
  	u8 conf;

  	char reg, ctrl;

  
  	err = kstrtoul(buf, 10, &val);
  	if (err < 0)
  		return err;

  	if (!(val == 0 || val == 1))

  		return -EINVAL;

  	/* F75373 does not support DC (linear voltage) fan control mode */
  	if (data->kind == f75373 && val == 0)
  		return -EINVAL;

  	/* take care for different registers */
  	if (data->kind == f75387) {
  		reg = F75375_REG_FAN_TIMER;
  		ctrl = F75387_FAN_CTRL_LINEAR(nr);
  	} else {
  		reg = F75375_REG_CONFIG1;
  		ctrl = F75375_FAN_CTRL_LINEAR(nr);
  	}

  	mutex_lock(&data->update_lock);

  	conf = f75375_read8(client, reg);
  	conf &= ~(1 << ctrl);

  
  	if (val == 0)

  		conf |= (1 << ctrl);

  	f75375_write8(client, reg, conf);

  	data->pwm_mode[nr] = val;
  	mutex_unlock(&data->update_lock);
  	return count;
  }
  
  static ssize_t show_pwm(struct device *dev, struct device_attribute
  		*attr, char *buf)
  {
  	int nr = to_sensor_dev_attr(attr)->index;
  	struct f75375_data *data = f75375_update_device(dev);
  	return sprintf(buf, "%d
  ", data->pwm[nr]);
  }
  
  static ssize_t show_pwm_mode(struct device *dev, struct device_attribute
  		*attr, char *buf)
  {
  	int nr = to_sensor_dev_attr(attr)->index;
  	struct f75375_data *data = f75375_update_device(dev);
  	return sprintf(buf, "%d
  ", data->pwm_mode[nr]);
  }
  
  #define VOLT_FROM_REG(val) ((val) * 8)
  #define VOLT_TO_REG(val) ((val) / 8)
  
  static ssize_t show_in(struct device *dev, struct device_attribute *attr,
  		char *buf)
  {
  	int nr = to_sensor_dev_attr(attr)->index;
  	struct f75375_data *data = f75375_update_device(dev);
  	return sprintf(buf, "%d
  ", VOLT_FROM_REG(data->in[nr]));
  }
  
  static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
  		char *buf)
  {
  	int nr = to_sensor_dev_attr(attr)->index;
  	struct f75375_data *data = f75375_update_device(dev);
  	return sprintf(buf, "%d
  ", VOLT_FROM_REG(data->in_max[nr]));
  }
  
  static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
  		char *buf)
  {
  	int nr = to_sensor_dev_attr(attr)->index;
  	struct f75375_data *data = f75375_update_device(dev);
  	return sprintf(buf, "%d
  ", VOLT_FROM_REG(data->in_min[nr]));
  }
  
  static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
  		const char *buf, size_t count)
  {
  	int nr = to_sensor_dev_attr(attr)->index;
  	struct i2c_client *client = to_i2c_client(dev);
  	struct f75375_data *data = i2c_get_clientdata(client);

  	unsigned long val;
  	int err;
  
  	err = kstrtoul(buf, 10, &val);
  	if (err < 0)
  		return err;

  	val = SENSORS_LIMIT(VOLT_TO_REG(val), 0, 0xff);
  	mutex_lock(&data->update_lock);
  	data->in_max[nr] = val;
  	f75375_write8(client, F75375_REG_VOLT_HIGH(nr), data->in_max[nr]);
  	mutex_unlock(&data->update_lock);
  	return count;
  }
  
  static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
  		const char *buf, size_t count)
  {
  	int nr = to_sensor_dev_attr(attr)->index;
  	struct i2c_client *client = to_i2c_client(dev);
  	struct f75375_data *data = i2c_get_clientdata(client);

  	unsigned long val;
  	int err;
  
  	err = kstrtoul(buf, 10, &val);
  	if (err < 0)
  		return err;

  	val = SENSORS_LIMIT(VOLT_TO_REG(val), 0, 0xff);
  	mutex_lock(&data->update_lock);
  	data->in_min[nr] = val;
  	f75375_write8(client, F75375_REG_VOLT_LOW(nr), data->in_min[nr]);
  	mutex_unlock(&data->update_lock);
  	return count;
  }
  #define TEMP_FROM_REG(val) ((val) * 1000)
  #define TEMP_TO_REG(val) ((val) / 1000)

  #define TEMP11_FROM_REG(reg)	((reg) / 32 * 125)

  static ssize_t show_temp11(struct device *dev, struct device_attribute *attr,

  		char *buf)
  {
  	int nr = to_sensor_dev_attr(attr)->index;
  	struct f75375_data *data = f75375_update_device(dev);

  	return sprintf(buf, "%d
  ", TEMP11_FROM_REG(data->temp11[nr]));

  }
  
  static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
  		char *buf)
  {
  	int nr = to_sensor_dev_attr(attr)->index;
  	struct f75375_data *data = f75375_update_device(dev);
  	return sprintf(buf, "%d
  ", TEMP_FROM_REG(data->temp_high[nr]));
  }
  
  static ssize_t show_temp_max_hyst(struct device *dev,
  		struct device_attribute *attr, char *buf)
  {
  	int nr = to_sensor_dev_attr(attr)->index;
  	struct f75375_data *data = f75375_update_device(dev);
  	return sprintf(buf, "%d
  ", TEMP_FROM_REG(data->temp_max_hyst[nr]));
  }
  
  static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
  		const char *buf, size_t count)
  {
  	int nr = to_sensor_dev_attr(attr)->index;
  	struct i2c_client *client = to_i2c_client(dev);
  	struct f75375_data *data = i2c_get_clientdata(client);

  	unsigned long val;
  	int err;
  
  	err = kstrtoul(buf, 10, &val);
  	if (err < 0)
  		return err;

  	val = SENSORS_LIMIT(TEMP_TO_REG(val), 0, 127);
  	mutex_lock(&data->update_lock);
  	data->temp_high[nr] = val;
  	f75375_write8(client, F75375_REG_TEMP_HIGH(nr), data->temp_high[nr]);
  	mutex_unlock(&data->update_lock);
  	return count;
  }
  
  static ssize_t set_temp_max_hyst(struct device *dev,
  	struct device_attribute *attr, const char *buf, size_t count)
  {
  	int nr = to_sensor_dev_attr(attr)->index;
  	struct i2c_client *client = to_i2c_client(dev);
  	struct f75375_data *data = i2c_get_clientdata(client);

  	unsigned long val;
  	int err;
  
  	err = kstrtoul(buf, 10, &val);
  	if (err < 0)
  		return err;

  	val = SENSORS_LIMIT(TEMP_TO_REG(val), 0, 127);
  	mutex_lock(&data->update_lock);
  	data->temp_max_hyst[nr] = val;
  	f75375_write8(client, F75375_REG_TEMP_HYST(nr),
  		data->temp_max_hyst[nr]);
  	mutex_unlock(&data->update_lock);
  	return count;
  }
  
  #define show_fan(thing) \
  static ssize_t show_##thing(struct device *dev, struct device_attribute *attr, \
  			char *buf)\
  {\
  	int nr = to_sensor_dev_attr(attr)->index;\
  	struct f75375_data *data = f75375_update_device(dev); \
  	return sprintf(buf, "%d
  ", rpm_from_reg(data->thing[nr])); \
  }
  
  show_fan(fan);
  show_fan(fan_min);

  show_fan(fan_max);
  show_fan(fan_target);

  
  static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_in, NULL, 0);
  static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO|S_IWUSR,
  	show_in_max, set_in_max, 0);
  static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO|S_IWUSR,
  	show_in_min, set_in_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(temp1_input, S_IRUGO, show_temp11, NULL, 0);

  static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO|S_IWUSR,
  	show_temp_max_hyst, set_temp_max_hyst, 0);
  static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO|S_IWUSR,
  	show_temp_max, set_temp_max, 0);

  static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 1);

  static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO|S_IWUSR,
  	show_temp_max_hyst, set_temp_max_hyst, 1);
  static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO|S_IWUSR,
  	show_temp_max, set_temp_max, 1);
  static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);

  static SENSOR_DEVICE_ATTR(fan1_max, S_IRUGO, show_fan_max, 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_max, S_IRUGO, show_fan_max, 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(pwm1, S_IRUGO|S_IWUSR,
  	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_mode, S_IRUGO,

  	show_pwm_mode, set_pwm_mode, 0);
  static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR,
  	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_mode, S_IRUGO,

  	show_pwm_mode, set_pwm_mode, 1);
  
  static struct attribute *f75375_attributes[] = {
  	&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_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_fan1_input.dev_attr.attr,

  	&sensor_dev_attr_fan1_max.dev_attr.attr,

  	&sensor_dev_attr_fan1_min.dev_attr.attr,

  	&sensor_dev_attr_fan1_target.dev_attr.attr,

  	&sensor_dev_attr_fan2_input.dev_attr.attr,

  	&sensor_dev_attr_fan2_max.dev_attr.attr,

  	&sensor_dev_attr_fan2_min.dev_attr.attr,

  	&sensor_dev_attr_fan2_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_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,
  	NULL
  };
  
  static const struct attribute_group f75375_group = {
  	.attrs = f75375_attributes,
  };

  static void f75375_init(struct i2c_client *client, struct f75375_data *data,
  		struct f75375s_platform_data *f75375s_pdata)
  {
  	int nr;

  
  	if (!f75375s_pdata) {
  		u8 conf, mode;
  		int nr;
  
  		conf = f75375_read8(client, F75375_REG_CONFIG1);
  		mode = f75375_read8(client, F75375_REG_FAN_TIMER);
  		for (nr = 0; nr < 2; nr++) {

  			if (data->kind == f75387) {
  				bool manu, duty;
  
  				if (!(conf & (1 << F75387_FAN_CTRL_LINEAR(nr))))
  					data->pwm_mode[nr] = 1;
  
  				manu = ((mode >> F75387_FAN_MANU_MODE(nr)) & 1);
  				duty = ((mode >> F75387_FAN_DUTY_MODE(nr)) & 1);
  				if (manu && duty)
  					/* speed */
  					data->pwm_enable[nr] = 3;
  				else if (!manu && duty)
  					/* automatic */
  					data->pwm_enable[nr] = 2;
  				else
  					/* manual */
  					data->pwm_enable[nr] = 1;
  			} else {
  				if (!(conf & (1 << F75375_FAN_CTRL_LINEAR(nr))))
  					data->pwm_mode[nr] = 1;
  
  				switch ((mode >> FAN_CTRL_MODE(nr)) & 3) {
  				case 0:		/* speed */
  					data->pwm_enable[nr] = 3;
  					break;
  				case 1:		/* automatic */
  					data->pwm_enable[nr] = 2;
  					break;
  				default:	/* manual */
  					data->pwm_enable[nr] = 1;
  					break;
  				}

  			}
  		}
  		return;
  	}

  	set_pwm_enable_direct(client, 0, f75375s_pdata->pwm_enable[0]);
  	set_pwm_enable_direct(client, 1, f75375s_pdata->pwm_enable[1]);
  	for (nr = 0; nr < 2; nr++) {
  		data->pwm[nr] = SENSORS_LIMIT(f75375s_pdata->pwm[nr], 0, 255);
  		f75375_write8(client, F75375_REG_FAN_PWM_DUTY(nr),
  			data->pwm[nr]);
  	}
  
  }

  static int f75375_probe(struct i2c_client *client,
  		const struct i2c_device_id *id)

  {

  	struct f75375_data *data;

  	struct f75375s_platform_data *f75375s_pdata = client->dev.platform_data;

  	int err;
  
  	if (!i2c_check_functionality(client->adapter,
  				I2C_FUNC_SMBUS_BYTE_DATA))
  		return -EIO;

  	data = kzalloc(sizeof(struct f75375_data), GFP_KERNEL);
  	if (!data)

  		return -ENOMEM;
  
  	i2c_set_clientdata(client, data);

  	mutex_init(&data->update_lock);

  	data->kind = id->driver_data;

  	err = sysfs_create_group(&client->dev.kobj, &f75375_group);
  	if (err)

  		goto exit_free;

  	if (data->kind == f75375) {
  		err = sysfs_chmod_file(&client->dev.kobj,
  			&sensor_dev_attr_pwm1_mode.dev_attr.attr,
  			S_IRUGO | S_IWUSR);
  		if (err)
  			goto exit_remove;
  		err = sysfs_chmod_file(&client->dev.kobj,
  			&sensor_dev_attr_pwm2_mode.dev_attr.attr,
  			S_IRUGO | S_IWUSR);
  		if (err)
  			goto exit_remove;
  	}

  	data->hwmon_dev = hwmon_device_register(&client->dev);
  	if (IS_ERR(data->hwmon_dev)) {
  		err = PTR_ERR(data->hwmon_dev);
  		goto exit_remove;
  	}

  	f75375_init(client, data, f75375s_pdata);

  	return 0;
  
  exit_remove:
  	sysfs_remove_group(&client->dev.kobj, &f75375_group);
  exit_free:
  	kfree(data);

  	return err;
  }
  
  static int f75375_remove(struct i2c_client *client)
  {
  	struct f75375_data *data = i2c_get_clientdata(client);
  	hwmon_device_unregister(data->hwmon_dev);
  	sysfs_remove_group(&client->dev.kobj, &f75375_group);

  	kfree(data);
  	return 0;
  }

  /* Return 0 if detection is successful, -ENODEV otherwise */

  static int f75375_detect(struct i2c_client *client,

  			 struct i2c_board_info *info)

  {

  	struct i2c_adapter *adapter = client->adapter;

  	u16 vendid, chipid;
  	u8 version;
  	const char *name;

  	vendid = f75375_read16(client, F75375_REG_VENDOR);
  	chipid = f75375_read16(client, F75375_CHIP_ID);

  	if (vendid != 0x1934)
  		return -ENODEV;
  
  	if (chipid == 0x0306)

  		name = "f75375";

  	else if (chipid == 0x0204)

  		name = "f75373";

  	else if (chipid == 0x0410)
  		name = "f75387";

  	else
  		return -ENODEV;
  
  	version = f75375_read8(client, F75375_REG_VERSION);

  	dev_info(&adapter->dev, "found %s version: %02X
  ", name, version);

  	strlcpy(info->type, name, I2C_NAME_SIZE);

  	return 0;

  }
  
  static int __init sensors_f75375_init(void)
  {

  	return i2c_add_driver(&f75375_driver);

  }
  
  static void __exit sensors_f75375_exit(void)
  {
  	i2c_del_driver(&f75375_driver);
  }

  MODULE_AUTHOR("Riku Voipio");

  MODULE_LICENSE("GPL");

  MODULE_DESCRIPTION("F75373/F75375/F75387 hardware monitoring driver");

  
  module_init(sensors_f75375_init);
  module_exit(sensors_f75375_exit);