w83793.c 49.7 KB
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/*
    w83793.c - Linux kernel driver for hardware monitoring
    Copyright (C) 2006 Winbond Electronics Corp.
                  Yuan Mu
                  Rudolf Marek <r.marek@assembler.cz>

    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 - version 2.

    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., 51 Franklin Street, Fifth Floor, Boston, MA
    02110-1301 USA.
*/

/*
    Supports following chips:

    Chip	#vin	#fanin	#pwm	#temp	wchipid	vendid	i2c	ISA
    w83793	10	12	8	6	0x7b	0x5ca3	yes	no
*/

#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/hwmon.h>
#include <linux/hwmon-vid.h>
#include <linux/hwmon-sysfs.h>
#include <linux/err.h>
#include <linux/mutex.h>

/* Addresses to scan */
static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f, I2C_CLIENT_END };

/* Insmod parameters */
I2C_CLIENT_INSMOD_1(w83793);
I2C_CLIENT_MODULE_PARM(force_subclients, "List of subclient addresses: "
		       "{bus, clientaddr, subclientaddr1, subclientaddr2}");

static int reset;
module_param(reset, bool, 0);
MODULE_PARM_DESC(reset, "Set to 1 to reset chip, not recommended");

/*
   Address 0x00, 0x0d, 0x0e, 0x0f in all three banks are reserved
   as ID, Bank Select registers
*/
#define W83793_REG_BANKSEL		0x00
#define W83793_REG_VENDORID		0x0d
#define W83793_REG_CHIPID		0x0e
#define W83793_REG_DEVICEID		0x0f

#define W83793_REG_CONFIG		0x40
#define W83793_REG_MFC			0x58
#define W83793_REG_FANIN_CTRL		0x5c
#define W83793_REG_FANIN_SEL		0x5d
#define W83793_REG_I2C_ADDR		0x0b
#define W83793_REG_I2C_SUBADDR		0x0c
#define W83793_REG_VID_INA		0x05
#define W83793_REG_VID_INB		0x06
#define W83793_REG_VID_LATCHA		0x07
#define W83793_REG_VID_LATCHB		0x08
#define W83793_REG_VID_CTRL		0x59

static u16 W83793_REG_TEMP_MODE[2] = { 0x5e, 0x5f };

#define TEMP_READ	0
#define TEMP_CRIT	1
#define TEMP_CRIT_HYST	2
#define TEMP_WARN	3
#define TEMP_WARN_HYST	4
/* only crit and crit_hyst affect real-time alarm status
   current crit crit_hyst warn warn_hyst */
static u16 W83793_REG_TEMP[][5] = {
	{0x1c, 0x78, 0x79, 0x7a, 0x7b},
	{0x1d, 0x7c, 0x7d, 0x7e, 0x7f},
	{0x1e, 0x80, 0x81, 0x82, 0x83},
	{0x1f, 0x84, 0x85, 0x86, 0x87},
	{0x20, 0x88, 0x89, 0x8a, 0x8b},
	{0x21, 0x8c, 0x8d, 0x8e, 0x8f},
};

#define W83793_REG_TEMP_LOW_BITS	0x22

#define W83793_REG_BEEP(index)		(0x53 + (index))
#define W83793_REG_ALARM(index)		(0x4b + (index))

#define W83793_REG_CLR_CHASSIS		0x4a	/* SMI MASK4 */
#define W83793_REG_IRQ_CTRL		0x50
#define W83793_REG_OVT_CTRL		0x51
#define W83793_REG_OVT_BEEP		0x52

#define IN_READ				0
#define IN_MAX				1
#define IN_LOW				2
static const u16 W83793_REG_IN[][3] = {
	/* Current, High, Low */
	{0x10, 0x60, 0x61},	/* Vcore A	*/
	{0x11, 0x62, 0x63},	/* Vcore B	*/
	{0x12, 0x64, 0x65},	/* Vtt		*/
	{0x14, 0x6a, 0x6b},	/* VSEN1	*/
	{0x15, 0x6c, 0x6d},	/* VSEN2	*/
	{0x16, 0x6e, 0x6f},	/* +3VSEN	*/
	{0x17, 0x70, 0x71},	/* +12VSEN	*/
	{0x18, 0x72, 0x73},	/* 5VDD		*/
	{0x19, 0x74, 0x75},	/* 5VSB		*/
	{0x1a, 0x76, 0x77},	/* VBAT		*/
};

/* Low Bits of Vcore A/B Vtt Read/High/Low */
static const u16 W83793_REG_IN_LOW_BITS[] = { 0x1b, 0x68, 0x69 };
static u8 scale_in[] = { 2, 2, 2, 16, 16, 16, 8, 24, 24, 16 };
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static u8 scale_in_add[] = { 0, 0, 0, 0, 0, 0, 0, 150, 150, 0 };
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#define W83793_REG_FAN(index)		(0x23 + 2 * (index))	/* High byte */
#define W83793_REG_FAN_MIN(index)	(0x90 + 2 * (index))	/* High byte */

#define W83793_REG_PWM_DEFAULT		0xb2
#define W83793_REG_PWM_ENABLE		0x207
#define W83793_REG_PWM_UPTIME		0xc3	/* Unit in 0.1 second */
#define W83793_REG_PWM_DOWNTIME		0xc4	/* Unit in 0.1 second */
#define W83793_REG_TEMP_CRITICAL	0xc5

#define PWM_DUTY			0
#define PWM_START			1
#define PWM_NONSTOP			2
#define W83793_REG_PWM(index, nr)	(((nr) == 0 ? 0xb3 : \
					 (nr) == 1 ? 0x220 : 0x218) + (index))

/* bit field, fan1 is bit0, fan2 is bit1 ... */
#define W83793_REG_TEMP_FAN_MAP(index)	(0x201 + (index))
#define W83793_REG_TEMP_TOL(index)	(0x208 + (index))
#define W83793_REG_TEMP_CRUISE(index)	(0x210 + (index))
#define W83793_REG_PWM_STOP_TIME(index)	(0x228 + (index))
#define W83793_REG_SF2_TEMP(index, nr)	(0x230 + ((index) << 4) + (nr))
#define W83793_REG_SF2_PWM(index, nr)	(0x238 + ((index) << 4) + (nr))

static inline unsigned long FAN_FROM_REG(u16 val)
{
	if ((val >= 0xfff) || (val == 0))
		return	0;
	return (1350000UL / val);
}

static inline u16 FAN_TO_REG(long rpm)
{
	if (rpm <= 0)
		return 0x0fff;
	return SENSORS_LIMIT((1350000 + (rpm >> 1)) / rpm, 1, 0xffe);
}

static inline unsigned long TIME_FROM_REG(u8 reg)
{
	return (reg * 100);
}

static inline u8 TIME_TO_REG(unsigned long val)
{
	return SENSORS_LIMIT((val + 50) / 100, 0, 0xff);
}

static inline long TEMP_FROM_REG(s8 reg)
{
	return (reg * 1000);
}

static inline s8 TEMP_TO_REG(long val, s8 min, s8 max)
{
	return SENSORS_LIMIT((val + (val < 0 ? -500 : 500)) / 1000, min, max);
}

struct w83793_data {
	struct i2c_client client;
	struct i2c_client *lm75[2];
	struct class_device *class_dev;
	struct mutex update_lock;
	char valid;			/* !=0 if following fields are valid */
	unsigned long last_updated;	/* In jiffies */
	unsigned long last_nonvolatile;	/* In jiffies, last time we update the
					   nonvolatile registers */

	u8 bank;
	u8 vrm;
	u8 vid[2];
	u8 in[10][3];		/* Register value, read/high/low */
	u8 in_low_bits[3];	/* Additional resolution for VCore A/B Vtt */

	u16 has_fan;		/* Only fan1- fan5 has own pins */
	u16 fan[12];		/* Register value combine */
	u16 fan_min[12];	/* Register value combine */

	s8 temp[6][5];		/* current, crit, crit_hyst,warn, warn_hyst */
	u8 temp_low_bits;	/* Additional resolution TD1-TD4 */
	u8 temp_mode[2];	/* byte 0: Temp D1-D4 mode each has 2 bits
				   byte 1: Temp R1,R2 mode, each has 1 bit */
	u8 temp_critical;	/* If reached all fan will be at full speed */
	u8 temp_fan_map[6];	/* Temp controls which pwm fan, bit field */

	u8 has_pwm;
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	u8 has_temp;
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	u8 has_vid;
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	u8 pwm_enable;		/* Register value, each Temp has 1 bit */
	u8 pwm_uptime;		/* Register value */
	u8 pwm_downtime;	/* Register value */
	u8 pwm_default;		/* All fan default pwm, next poweron valid */
	u8 pwm[8][3];		/* Register value */
	u8 pwm_stop_time[8];
	u8 temp_cruise[6];

	u8 alarms[5];		/* realtime status registers */
	u8 beeps[5];
	u8 beep_enable;
	u8 tolerance[3];	/* Temp tolerance(Smart Fan I/II) */
	u8 sf2_pwm[6][7];	/* Smart FanII: Fan duty cycle */
	u8 sf2_temp[6][7];	/* Smart FanII: Temp level point */
};

static u8 w83793_read_value(struct i2c_client *client, u16 reg);
static int w83793_write_value(struct i2c_client *client, u16 reg, u8 value);
static int w83793_attach_adapter(struct i2c_adapter *adapter);
static int w83793_detect(struct i2c_adapter *adapter, int address, int kind);
static int w83793_detach_client(struct i2c_client *client);
static void w83793_init_client(struct i2c_client *client);
static void w83793_update_nonvolatile(struct device *dev);
static struct w83793_data *w83793_update_device(struct device *dev);

static struct i2c_driver w83793_driver = {
	.driver = {
		   .name = "w83793",
	},
	.attach_adapter = w83793_attach_adapter,
	.detach_client = w83793_detach_client,
};

static ssize_t
show_vrm(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct w83793_data *data = i2c_get_clientdata(client);

	return sprintf(buf, "%d\n", data->vrm);
}

static ssize_t
show_vid(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct w83793_data *data = w83793_update_device(dev);
	struct sensor_device_attribute_2 *sensor_attr =
	    to_sensor_dev_attr_2(attr);
	int index = sensor_attr->index;

	return sprintf(buf, "%d\n", vid_from_reg(data->vid[index], data->vrm));
}

static ssize_t
store_vrm(struct device *dev, struct device_attribute *attr,
	  const char *buf, size_t count)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct w83793_data *data = i2c_get_clientdata(client);

	data->vrm = simple_strtoul(buf, NULL, 10);
	return count;
}

#define ALARM_STATUS			0
#define BEEP_ENABLE			1
static ssize_t
show_alarm_beep(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct w83793_data *data = w83793_update_device(dev);
	struct sensor_device_attribute_2 *sensor_attr =
	    to_sensor_dev_attr_2(attr);
	int nr = sensor_attr->nr;
	int index = sensor_attr->index >> 3;
	int bit = sensor_attr->index & 0x07;
	u8 val;

	if (ALARM_STATUS == nr) {
		val = (data->alarms[index] >> (bit)) & 1;
	} else {		/* BEEP_ENABLE */
		val = (data->beeps[index] >> (bit)) & 1;
	}

	return sprintf(buf, "%u\n", val);
}

static ssize_t
store_beep(struct device *dev, struct device_attribute *attr,
	   const char *buf, size_t count)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct w83793_data *data = i2c_get_clientdata(client);
	struct sensor_device_attribute_2 *sensor_attr =
	    to_sensor_dev_attr_2(attr);
	int index = sensor_attr->index >> 3;
	int shift = sensor_attr->index & 0x07;
	u8 beep_bit = 1 << shift;
	u8 val;

	val = simple_strtoul(buf, NULL, 10);
	if (val != 0 && val != 1)
		return -EINVAL;

	mutex_lock(&data->update_lock);
	data->beeps[index] = w83793_read_value(client, W83793_REG_BEEP(index));
	data->beeps[index] &= ~beep_bit;
	data->beeps[index] |= val << shift;
	w83793_write_value(client, W83793_REG_BEEP(index), data->beeps[index]);
	mutex_unlock(&data->update_lock);

	return count;
}

static ssize_t
show_beep_enable(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct w83793_data *data = w83793_update_device(dev);
	return sprintf(buf, "%u\n", (data->beep_enable >> 1) & 0x01);
}

static ssize_t
store_beep_enable(struct device *dev, struct device_attribute *attr,
		  const char *buf, size_t count)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct w83793_data *data = i2c_get_clientdata(client);
	u8 val = simple_strtoul(buf, NULL, 10);

	if (val != 0 && val != 1)
		return -EINVAL;

	mutex_lock(&data->update_lock);
	data->beep_enable = w83793_read_value(client, W83793_REG_OVT_BEEP)
			    & 0xfd;
	data->beep_enable |= val << 1;
	w83793_write_value(client, W83793_REG_OVT_BEEP, data->beep_enable);
	mutex_unlock(&data->update_lock);

	return count;
}

/* Write any value to clear chassis alarm */
static ssize_t
store_chassis_clear(struct device *dev,
		    struct device_attribute *attr, const char *buf,
		    size_t count)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct w83793_data *data = i2c_get_clientdata(client);
	u8 val;

	mutex_lock(&data->update_lock);
	val = w83793_read_value(client, W83793_REG_CLR_CHASSIS);
	val |= 0x80;
	w83793_write_value(client, W83793_REG_CLR_CHASSIS, val);
	mutex_unlock(&data->update_lock);
	return count;
}

#define FAN_INPUT			0
#define FAN_MIN				1
static ssize_t
show_fan(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct sensor_device_attribute_2 *sensor_attr =
	    to_sensor_dev_attr_2(attr);
	int nr = sensor_attr->nr;
	int index = sensor_attr->index;
	struct w83793_data *data = w83793_update_device(dev);
	u16 val;

	if (FAN_INPUT == nr) {
		val = data->fan[index] & 0x0fff;
	} else {
		val = data->fan_min[index] & 0x0fff;
	}

	return sprintf(buf, "%lu\n", FAN_FROM_REG(val));
}

static ssize_t
store_fan_min(struct device *dev, struct device_attribute *attr,
	      const char *buf, size_t count)
{
	struct sensor_device_attribute_2 *sensor_attr =
	    to_sensor_dev_attr_2(attr);
	int index = sensor_attr->index;
	struct i2c_client *client = to_i2c_client(dev);
	struct w83793_data *data = i2c_get_clientdata(client);
	u16 val = FAN_TO_REG(simple_strtoul(buf, NULL, 10));

	mutex_lock(&data->update_lock);
	data->fan_min[index] = val;
	w83793_write_value(client, W83793_REG_FAN_MIN(index),
			   (val >> 8) & 0xff);
	w83793_write_value(client, W83793_REG_FAN_MIN(index) + 1, val & 0xff);
	mutex_unlock(&data->update_lock);

	return count;
}

#define PWM_DUTY			0
#define PWM_START			1
#define PWM_NONSTOP			2
#define PWM_STOP_TIME			3
static ssize_t
show_pwm(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct sensor_device_attribute_2 *sensor_attr =
	    to_sensor_dev_attr_2(attr);
	struct w83793_data *data = w83793_update_device(dev);
	u16 val;
	int nr = sensor_attr->nr;
	int index = sensor_attr->index;

	if (PWM_STOP_TIME == nr)
		val = TIME_FROM_REG(data->pwm_stop_time[index]);
	else
		val = (data->pwm[index][nr] & 0x3f) << 2;

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

static ssize_t
store_pwm(struct device *dev, struct device_attribute *attr,
	  const char *buf, size_t count)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct w83793_data *data = i2c_get_clientdata(client);
	struct sensor_device_attribute_2 *sensor_attr =
	    to_sensor_dev_attr_2(attr);
	int nr = sensor_attr->nr;
	int index = sensor_attr->index;
	u8 val;

	mutex_lock(&data->update_lock);
	if (PWM_STOP_TIME == nr) {
		val = TIME_TO_REG(simple_strtoul(buf, NULL, 10));
		data->pwm_stop_time[index] = val;
		w83793_write_value(client, W83793_REG_PWM_STOP_TIME(index),
				   val);
	} else {
		val = SENSORS_LIMIT(simple_strtoul(buf, NULL, 10), 0, 0xff)
		      >> 2;
		data->pwm[index][nr] =
		    w83793_read_value(client, W83793_REG_PWM(index, nr)) & 0xc0;
		data->pwm[index][nr] |= val;
		w83793_write_value(client, W83793_REG_PWM(index, nr),
							data->pwm[index][nr]);
	}

	mutex_unlock(&data->update_lock);
	return count;
}

static ssize_t
show_temp(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct sensor_device_attribute_2 *sensor_attr =
	    to_sensor_dev_attr_2(attr);
	int nr = sensor_attr->nr;
	int index = sensor_attr->index;
	struct w83793_data *data = w83793_update_device(dev);
	long temp = TEMP_FROM_REG(data->temp[index][nr]);

	if (TEMP_READ == nr && index < 4) {	/* Only TD1-TD4 have low bits */
		int low = ((data->temp_low_bits >> (index * 2)) & 0x03) * 250;
		temp += temp > 0 ? low : -low;
	}
	return sprintf(buf, "%ld\n", temp);
}

static ssize_t
store_temp(struct device *dev, struct device_attribute *attr,
	   const char *buf, size_t count)
{
	struct sensor_device_attribute_2 *sensor_attr =
	    to_sensor_dev_attr_2(attr);
	int nr = sensor_attr->nr;
	int index = sensor_attr->index;
	struct i2c_client *client = to_i2c_client(dev);
	struct w83793_data *data = i2c_get_clientdata(client);
	long tmp = simple_strtol(buf, NULL, 10);

	mutex_lock(&data->update_lock);
	data->temp[index][nr] = TEMP_TO_REG(tmp, -128, 127);
	w83793_write_value(client, W83793_REG_TEMP[index][nr],
			   data->temp[index][nr]);
	mutex_unlock(&data->update_lock);
	return count;
}

/*
	TD1-TD4
	each has 4 mode:(2 bits)
	0:	Stop monitor
	1:	Use internal temp sensor(default)
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	2:	Reserved
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	3:	Use sensor in Intel CPU and get result by PECI

	TR1-TR2
	each has 2 mode:(1 bit)
	0:	Disable temp sensor monitor
	1:	To enable temp sensors monitor
*/

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/* 0 disable, 6 PECI */
static u8 TO_TEMP_MODE[] = { 0, 0, 0, 6 };
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static ssize_t
show_temp_mode(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct w83793_data *data = w83793_update_device(dev);
	struct sensor_device_attribute_2 *sensor_attr =
	    to_sensor_dev_attr_2(attr);
	int index = sensor_attr->index;
	u8 mask = (index < 4) ? 0x03 : 0x01;
	u8 shift = (index < 4) ? (2 * index) : (index - 4);
	u8 tmp;
	index = (index < 4) ? 0 : 1;

	tmp = (data->temp_mode[index] >> shift) & mask;

	/* for the internal sensor, found out if diode or thermistor */
	if (tmp == 1) {
		tmp = index == 0 ? 3 : 4;
	} else {
		tmp = TO_TEMP_MODE[tmp];
	}

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

static ssize_t
store_temp_mode(struct device *dev, struct device_attribute *attr,
		const char *buf, size_t count)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct w83793_data *data = i2c_get_clientdata(client);
	struct sensor_device_attribute_2 *sensor_attr =
	    to_sensor_dev_attr_2(attr);
	int index = sensor_attr->index;
	u8 mask = (index < 4) ? 0x03 : 0x01;
	u8 shift = (index < 4) ? (2 * index) : (index - 4);
	u8 val = simple_strtoul(buf, NULL, 10);

	/* transform the sysfs interface values into table above */
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	if ((val == 6) && (index < 4)) {
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		val -= 3;
	} else if ((val == 3 && index < 4)
559
		|| (val == 4 && index >= 4)) {
560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843
		/* transform diode or thermistor into internal enable */
		val = !!val;
	} else {
		return -EINVAL;
	}

	index = (index < 4) ? 0 : 1;
	mutex_lock(&data->update_lock);
	data->temp_mode[index] =
	    w83793_read_value(client, W83793_REG_TEMP_MODE[index]);
	data->temp_mode[index] &= ~(mask << shift);
	data->temp_mode[index] |= val << shift;
	w83793_write_value(client, W83793_REG_TEMP_MODE[index],
							data->temp_mode[index]);
	mutex_unlock(&data->update_lock);

	return count;
}

#define SETUP_PWM_DEFAULT		0
#define SETUP_PWM_UPTIME		1	/* Unit in 0.1s */
#define SETUP_PWM_DOWNTIME		2	/* Unit in 0.1s */
#define SETUP_TEMP_CRITICAL		3
static ssize_t
show_sf_setup(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct sensor_device_attribute_2 *sensor_attr =
	    to_sensor_dev_attr_2(attr);
	int nr = sensor_attr->nr;
	struct w83793_data *data = w83793_update_device(dev);
	u32 val = 0;

	if (SETUP_PWM_DEFAULT == nr) {
		val = (data->pwm_default & 0x3f) << 2;
	} else if (SETUP_PWM_UPTIME == nr) {
		val = TIME_FROM_REG(data->pwm_uptime);
	} else if (SETUP_PWM_DOWNTIME == nr) {
		val = TIME_FROM_REG(data->pwm_downtime);
	} else if (SETUP_TEMP_CRITICAL == nr) {
		val = TEMP_FROM_REG(data->temp_critical & 0x7f);
	}

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

static ssize_t
store_sf_setup(struct device *dev, struct device_attribute *attr,
	       const char *buf, size_t count)
{
	struct sensor_device_attribute_2 *sensor_attr =
	    to_sensor_dev_attr_2(attr);
	int nr = sensor_attr->nr;
	struct i2c_client *client = to_i2c_client(dev);
	struct w83793_data *data = i2c_get_clientdata(client);

	mutex_lock(&data->update_lock);
	if (SETUP_PWM_DEFAULT == nr) {
		data->pwm_default =
		    w83793_read_value(client, W83793_REG_PWM_DEFAULT) & 0xc0;
		data->pwm_default |= SENSORS_LIMIT(simple_strtoul(buf, NULL,
								  10),
						   0, 0xff) >> 2;
		w83793_write_value(client, W83793_REG_PWM_DEFAULT,
							data->pwm_default);
	} else if (SETUP_PWM_UPTIME == nr) {
		data->pwm_uptime = TIME_TO_REG(simple_strtoul(buf, NULL, 10));
		data->pwm_uptime += data->pwm_uptime == 0 ? 1 : 0;
		w83793_write_value(client, W83793_REG_PWM_UPTIME,
							data->pwm_uptime);
	} else if (SETUP_PWM_DOWNTIME == nr) {
		data->pwm_downtime = TIME_TO_REG(simple_strtoul(buf, NULL, 10));
		data->pwm_downtime += data->pwm_downtime == 0 ? 1 : 0;
		w83793_write_value(client, W83793_REG_PWM_DOWNTIME,
							data->pwm_downtime);
	} else {		/* SETUP_TEMP_CRITICAL */
		data->temp_critical =
		    w83793_read_value(client, W83793_REG_TEMP_CRITICAL) & 0x80;
		data->temp_critical |= TEMP_TO_REG(simple_strtol(buf, NULL, 10),
						   0, 0x7f);
		w83793_write_value(client, W83793_REG_TEMP_CRITICAL,
							data->temp_critical);
	}

	mutex_unlock(&data->update_lock);
	return count;
}

/*
	Temp SmartFan control
	TEMP_FAN_MAP
	Temp channel control which pwm fan, bitfield, bit 0 indicate pwm1...
	It's possible two or more temp channels control the same fan, w83793
	always prefers to pick the most critical request and applies it to
	the related Fan.
	It's possible one fan is not in any mapping of 6 temp channels, this
	means the fan is manual mode

	TEMP_PWM_ENABLE
	Each temp channel has its own SmartFan mode, and temp channel
	control	fans that are set by TEMP_FAN_MAP
	0:	SmartFanII mode
	1:	Thermal Cruise Mode

	TEMP_CRUISE
	Target temperature in thermal cruise mode, w83793 will try to turn
	fan speed to keep the temperature of target device around this
	temperature.

	TEMP_TOLERANCE
	If Temp higher or lower than target with this tolerance, w83793
	will take actions to speed up or slow down the fan to keep the
	temperature within the tolerance range.
*/

#define TEMP_FAN_MAP			0
#define TEMP_PWM_ENABLE			1
#define TEMP_CRUISE			2
#define TEMP_TOLERANCE			3
static ssize_t
show_sf_ctrl(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct sensor_device_attribute_2 *sensor_attr =
	    to_sensor_dev_attr_2(attr);
	int nr = sensor_attr->nr;
	int index = sensor_attr->index;
	struct w83793_data *data = w83793_update_device(dev);
	u32 val;

	if (TEMP_FAN_MAP == nr) {
		val = data->temp_fan_map[index];
	} else if (TEMP_PWM_ENABLE == nr) {
		/* +2 to transfrom into 2 and 3 to conform with sysfs intf */
		val = ((data->pwm_enable >> index) & 0x01) + 2;
	} else if (TEMP_CRUISE == nr) {
		val = TEMP_FROM_REG(data->temp_cruise[index] & 0x7f);
	} else {		/* TEMP_TOLERANCE */
		val = data->tolerance[index >> 1] >> ((index & 0x01) ? 4 : 0);
		val = TEMP_FROM_REG(val & 0x0f);
	}
	return sprintf(buf, "%d\n", val);
}

static ssize_t
store_sf_ctrl(struct device *dev, struct device_attribute *attr,
	      const char *buf, size_t count)
{
	struct sensor_device_attribute_2 *sensor_attr =
	    to_sensor_dev_attr_2(attr);
	int nr = sensor_attr->nr;
	int index = sensor_attr->index;
	struct i2c_client *client = to_i2c_client(dev);
	struct w83793_data *data = i2c_get_clientdata(client);
	u32 val;

	mutex_lock(&data->update_lock);
	if (TEMP_FAN_MAP == nr) {
		val = simple_strtoul(buf, NULL, 10) & 0xff;
		w83793_write_value(client, W83793_REG_TEMP_FAN_MAP(index), val);
		data->temp_fan_map[index] = val;
	} else if (TEMP_PWM_ENABLE == nr) {
		val = simple_strtoul(buf, NULL, 10);
		if (2 == val || 3 == val) {
			data->pwm_enable =
			    w83793_read_value(client, W83793_REG_PWM_ENABLE);
			if (val - 2)
				data->pwm_enable |= 1 << index;
			else
				data->pwm_enable &= ~(1 << index);
			w83793_write_value(client, W83793_REG_PWM_ENABLE,
							data->pwm_enable);
		} else {
			mutex_unlock(&data->update_lock);
			return -EINVAL;
		}
	} else if (TEMP_CRUISE == nr) {
		data->temp_cruise[index] =
		    w83793_read_value(client, W83793_REG_TEMP_CRUISE(index));
		val = TEMP_TO_REG(simple_strtol(buf, NULL, 10), 0, 0x7f);
		data->temp_cruise[index] &= 0x80;
		data->temp_cruise[index] |= val;

		w83793_write_value(client, W83793_REG_TEMP_CRUISE(index),
						data->temp_cruise[index]);
	} else {		/* TEMP_TOLERANCE */
		int i = index >> 1;
		u8 shift = (index & 0x01) ? 4 : 0;
		data->tolerance[i] =
		    w83793_read_value(client, W83793_REG_TEMP_TOL(i));

		val = TEMP_TO_REG(simple_strtol(buf, NULL, 10), 0, 0x0f);
		data->tolerance[i] &= ~(0x0f << shift);
		data->tolerance[i] |= val << shift;
		w83793_write_value(client, W83793_REG_TEMP_TOL(i),
							data->tolerance[i]);
	}

	mutex_unlock(&data->update_lock);
	return count;
}

static ssize_t
show_sf2_pwm(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct sensor_device_attribute_2 *sensor_attr =
	    to_sensor_dev_attr_2(attr);
	int nr = sensor_attr->nr;
	int index = sensor_attr->index;
	struct w83793_data *data = w83793_update_device(dev);

	return sprintf(buf, "%d\n", (data->sf2_pwm[index][nr] & 0x3f) << 2);
}

static ssize_t
store_sf2_pwm(struct device *dev, struct device_attribute *attr,
	      const char *buf, size_t count)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct w83793_data *data = i2c_get_clientdata(client);
	struct sensor_device_attribute_2 *sensor_attr =
	    to_sensor_dev_attr_2(attr);
	int nr = sensor_attr->nr;
	int index = sensor_attr->index;
	u8 val = SENSORS_LIMIT(simple_strtoul(buf, NULL, 10), 0, 0xff) >> 2;

	mutex_lock(&data->update_lock);
	data->sf2_pwm[index][nr] =
	    w83793_read_value(client, W83793_REG_SF2_PWM(index, nr)) & 0xc0;
	data->sf2_pwm[index][nr] |= val;
	w83793_write_value(client, W83793_REG_SF2_PWM(index, nr),
						data->sf2_pwm[index][nr]);
	mutex_unlock(&data->update_lock);
	return count;
}

static ssize_t
show_sf2_temp(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct sensor_device_attribute_2 *sensor_attr =
	    to_sensor_dev_attr_2(attr);
	int nr = sensor_attr->nr;
	int index = sensor_attr->index;
	struct w83793_data *data = w83793_update_device(dev);

	return sprintf(buf, "%ld\n",
		       TEMP_FROM_REG(data->sf2_temp[index][nr] & 0x7f));
}

static ssize_t
store_sf2_temp(struct device *dev, struct device_attribute *attr,
	       const char *buf, size_t count)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct w83793_data *data = i2c_get_clientdata(client);
	struct sensor_device_attribute_2 *sensor_attr =
	    to_sensor_dev_attr_2(attr);
	int nr = sensor_attr->nr;
	int index = sensor_attr->index;
	u8 val = TEMP_TO_REG(simple_strtol(buf, NULL, 10), 0, 0x7f);

	mutex_lock(&data->update_lock);
	data->sf2_temp[index][nr] =
	    w83793_read_value(client, W83793_REG_SF2_TEMP(index, nr)) & 0x80;
	data->sf2_temp[index][nr] |= val;
	w83793_write_value(client, W83793_REG_SF2_TEMP(index, nr),
					     data->sf2_temp[index][nr]);
	mutex_unlock(&data->update_lock);
	return count;
}

/* only Vcore A/B and Vtt have additional 2 bits precision */
static ssize_t
show_in(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct sensor_device_attribute_2 *sensor_attr =
	    to_sensor_dev_attr_2(attr);
	int nr = sensor_attr->nr;
	int index = sensor_attr->index;
	struct w83793_data *data = w83793_update_device(dev);
	u16 val = data->in[index][nr];

	if (index < 3) {
		val <<= 2;
		val += (data->in_low_bits[nr] >> (index * 2)) & 0x3;
	}
844 845 846
	/* voltage inputs 5VDD and 5VSB needs 150mV offset */
	val = val * scale_in[index] + scale_in_add[index];
	return sprintf(buf, "%d\n", val);
847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865
}

static ssize_t
store_in(struct device *dev, struct device_attribute *attr,
	 const char *buf, size_t count)
{
	struct sensor_device_attribute_2 *sensor_attr =
	    to_sensor_dev_attr_2(attr);
	int nr = sensor_attr->nr;
	int index = sensor_attr->index;
	struct i2c_client *client = to_i2c_client(dev);
	struct w83793_data *data = i2c_get_clientdata(client);
	u32 val;

	val =
	    (simple_strtoul(buf, NULL, 10) +
	     scale_in[index] / 2) / scale_in[index];
	mutex_lock(&data->update_lock);
	if (index > 2) {
866 867 868 869
		/* fix the limit values of 5VDD and 5VSB to ALARM mechanism */
		if (1 == nr || 2 == nr) {
			val -= scale_in_add[index] / scale_in[index];
		}
870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999
		val = SENSORS_LIMIT(val, 0, 255);
	} else {
		val = SENSORS_LIMIT(val, 0, 0x3FF);
		data->in_low_bits[nr] =
		    w83793_read_value(client, W83793_REG_IN_LOW_BITS[nr]);
		data->in_low_bits[nr] &= ~(0x03 << (2 * index));
		data->in_low_bits[nr] |= (val & 0x03) << (2 * index);
		w83793_write_value(client, W83793_REG_IN_LOW_BITS[nr],
						     data->in_low_bits[nr]);
		val >>= 2;
	}
	data->in[index][nr] = val;
	w83793_write_value(client, W83793_REG_IN[index][nr],
							data->in[index][nr]);
	mutex_unlock(&data->update_lock);
	return count;
}

#define NOT_USED			-1

#define SENSOR_ATTR_IN(index)						\
	SENSOR_ATTR_2(in##index##_input, S_IRUGO, show_in, NULL,	\
		IN_READ, index),					\
	SENSOR_ATTR_2(in##index##_max, S_IRUGO | S_IWUSR, show_in,	\
		store_in, IN_MAX, index),				\
	SENSOR_ATTR_2(in##index##_min, S_IRUGO | S_IWUSR, show_in,	\
		store_in, IN_LOW, index),				\
	SENSOR_ATTR_2(in##index##_alarm, S_IRUGO, show_alarm_beep,	\
		NULL, ALARM_STATUS, index + ((index > 2) ? 1 : 0)),	\
	SENSOR_ATTR_2(in##index##_beep, S_IWUSR | S_IRUGO,		\
		show_alarm_beep, store_beep, BEEP_ENABLE,		\
		index + ((index > 2) ? 1 : 0))

#define SENSOR_ATTR_FAN(index)						\
	SENSOR_ATTR_2(fan##index##_alarm, S_IRUGO, show_alarm_beep,	\
		NULL, ALARM_STATUS, index + 17),			\
	SENSOR_ATTR_2(fan##index##_beep, S_IWUSR | S_IRUGO,		\
		show_alarm_beep, store_beep, BEEP_ENABLE, index + 17),	\
	SENSOR_ATTR_2(fan##index##_input, S_IRUGO, show_fan,		\
		NULL, FAN_INPUT, index - 1),				\
	SENSOR_ATTR_2(fan##index##_min, S_IWUSR | S_IRUGO,		\
		show_fan, store_fan_min, FAN_MIN, index - 1)

#define SENSOR_ATTR_PWM(index)						\
	SENSOR_ATTR_2(pwm##index, S_IWUSR | S_IRUGO, show_pwm,		\
		store_pwm, PWM_DUTY, index - 1),			\
	SENSOR_ATTR_2(pwm##index##_nonstop, S_IWUSR | S_IRUGO,		\
		show_pwm, store_pwm, PWM_NONSTOP, index - 1),		\
	SENSOR_ATTR_2(pwm##index##_start, S_IWUSR | S_IRUGO,		\
		show_pwm, store_pwm, PWM_START, index - 1),		\
	SENSOR_ATTR_2(pwm##index##_stop_time, S_IWUSR | S_IRUGO,	\
		show_pwm, store_pwm, PWM_STOP_TIME, index - 1)

#define SENSOR_ATTR_TEMP(index)						\
	SENSOR_ATTR_2(temp##index##_type, S_IRUGO | S_IWUSR,		\
		show_temp_mode, store_temp_mode, NOT_USED, index - 1),	\
	SENSOR_ATTR_2(temp##index##_input, S_IRUGO, show_temp,		\
		NULL, TEMP_READ, index - 1),				\
	SENSOR_ATTR_2(temp##index##_max, S_IRUGO | S_IWUSR, show_temp,	\
		store_temp, TEMP_CRIT, index - 1),			\
	SENSOR_ATTR_2(temp##index##_max_hyst, S_IRUGO | S_IWUSR,	\
		show_temp, store_temp, TEMP_CRIT_HYST, index - 1),	\
	SENSOR_ATTR_2(temp##index##_warn, S_IRUGO | S_IWUSR, show_temp,	\
		store_temp, TEMP_WARN, index - 1),			\
	SENSOR_ATTR_2(temp##index##_warn_hyst, S_IRUGO | S_IWUSR,	\
		show_temp, store_temp, TEMP_WARN_HYST, index - 1),	\
	SENSOR_ATTR_2(temp##index##_alarm, S_IRUGO,			\
		show_alarm_beep, NULL, ALARM_STATUS, index + 11),	\
	SENSOR_ATTR_2(temp##index##_beep, S_IWUSR | S_IRUGO,		\
		show_alarm_beep, store_beep, BEEP_ENABLE, index + 11),	\
	SENSOR_ATTR_2(temp##index##_auto_channels_pwm,			\
		S_IRUGO | S_IWUSR, show_sf_ctrl, store_sf_ctrl,		\
		TEMP_FAN_MAP, index - 1),				\
	SENSOR_ATTR_2(temp##index##_pwm_enable, S_IWUSR | S_IRUGO,	\
		show_sf_ctrl, store_sf_ctrl, TEMP_PWM_ENABLE,		\
		index - 1),						\
	SENSOR_ATTR_2(thermal_cruise##index, S_IRUGO | S_IWUSR,		\
		show_sf_ctrl, store_sf_ctrl, TEMP_CRUISE, index - 1),	\
	SENSOR_ATTR_2(tolerance##index, S_IRUGO | S_IWUSR, show_sf_ctrl,\
		store_sf_ctrl, TEMP_TOLERANCE, index - 1),		\
	SENSOR_ATTR_2(temp##index##_auto_point1_pwm, S_IRUGO | S_IWUSR, \
		show_sf2_pwm, store_sf2_pwm, 0, index - 1),		\
	SENSOR_ATTR_2(temp##index##_auto_point2_pwm, S_IRUGO | S_IWUSR, \
		show_sf2_pwm, store_sf2_pwm, 1, index - 1),		\
	SENSOR_ATTR_2(temp##index##_auto_point3_pwm, S_IRUGO | S_IWUSR, \
		show_sf2_pwm, store_sf2_pwm, 2, index - 1),		\
	SENSOR_ATTR_2(temp##index##_auto_point4_pwm, S_IRUGO | S_IWUSR, \
		show_sf2_pwm, store_sf2_pwm, 3, index - 1),		\
	SENSOR_ATTR_2(temp##index##_auto_point5_pwm, S_IRUGO | S_IWUSR, \
		show_sf2_pwm, store_sf2_pwm, 4, index - 1),		\
	SENSOR_ATTR_2(temp##index##_auto_point6_pwm, S_IRUGO | S_IWUSR, \
		show_sf2_pwm, store_sf2_pwm, 5, index - 1),		\
	SENSOR_ATTR_2(temp##index##_auto_point7_pwm, S_IRUGO | S_IWUSR, \
		show_sf2_pwm, store_sf2_pwm, 6, index - 1),		\
	SENSOR_ATTR_2(temp##index##_auto_point1_temp, S_IRUGO | S_IWUSR,\
		show_sf2_temp, store_sf2_temp, 0, index - 1),		\
	SENSOR_ATTR_2(temp##index##_auto_point2_temp, S_IRUGO | S_IWUSR,\
		show_sf2_temp, store_sf2_temp, 1, index - 1),		\
	SENSOR_ATTR_2(temp##index##_auto_point3_temp, S_IRUGO | S_IWUSR,\
		show_sf2_temp, store_sf2_temp, 2, index - 1),		\
	SENSOR_ATTR_2(temp##index##_auto_point4_temp, S_IRUGO | S_IWUSR,\
		show_sf2_temp, store_sf2_temp, 3, index - 1),		\
	SENSOR_ATTR_2(temp##index##_auto_point5_temp, S_IRUGO | S_IWUSR,\
		show_sf2_temp, store_sf2_temp, 4, index - 1),		\
	SENSOR_ATTR_2(temp##index##_auto_point6_temp, S_IRUGO | S_IWUSR,\
		show_sf2_temp, store_sf2_temp, 5, index - 1),		\
	SENSOR_ATTR_2(temp##index##_auto_point7_temp, S_IRUGO | S_IWUSR,\
		show_sf2_temp, store_sf2_temp, 6, index - 1)

static struct sensor_device_attribute_2 w83793_sensor_attr_2[] = {
	SENSOR_ATTR_IN(0),
	SENSOR_ATTR_IN(1),
	SENSOR_ATTR_IN(2),
	SENSOR_ATTR_IN(3),
	SENSOR_ATTR_IN(4),
	SENSOR_ATTR_IN(5),
	SENSOR_ATTR_IN(6),
	SENSOR_ATTR_IN(7),
	SENSOR_ATTR_IN(8),
	SENSOR_ATTR_IN(9),
	SENSOR_ATTR_FAN(1),
	SENSOR_ATTR_FAN(2),
	SENSOR_ATTR_FAN(3),
	SENSOR_ATTR_FAN(4),
	SENSOR_ATTR_FAN(5),
	SENSOR_ATTR_PWM(1),
	SENSOR_ATTR_PWM(2),
	SENSOR_ATTR_PWM(3),
};

1000 1001 1002 1003 1004 1005 1006 1007 1008
static struct sensor_device_attribute_2 w83793_temp[] = {
	SENSOR_ATTR_TEMP(1),
	SENSOR_ATTR_TEMP(2),
	SENSOR_ATTR_TEMP(3),
	SENSOR_ATTR_TEMP(4),
	SENSOR_ATTR_TEMP(5),
	SENSOR_ATTR_TEMP(6),
};

1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028
/* Fan6-Fan12 */
static struct sensor_device_attribute_2 w83793_left_fan[] = {
	SENSOR_ATTR_FAN(6),
	SENSOR_ATTR_FAN(7),
	SENSOR_ATTR_FAN(8),
	SENSOR_ATTR_FAN(9),
	SENSOR_ATTR_FAN(10),
	SENSOR_ATTR_FAN(11),
	SENSOR_ATTR_FAN(12),
};

/* Pwm4-Pwm8 */
static struct sensor_device_attribute_2 w83793_left_pwm[] = {
	SENSOR_ATTR_PWM(4),
	SENSOR_ATTR_PWM(5),
	SENSOR_ATTR_PWM(6),
	SENSOR_ATTR_PWM(7),
	SENSOR_ATTR_PWM(8),
};

1029
static struct sensor_device_attribute_2 w83793_vid[] = {
1030 1031
	SENSOR_ATTR_2(cpu0_vid, S_IRUGO, show_vid, NULL, NOT_USED, 0),
	SENSOR_ATTR_2(cpu1_vid, S_IRUGO, show_vid, NULL, NOT_USED, 1),
1032 1033 1034
};

static struct sensor_device_attribute_2 sda_single_files[] = {
1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086
	SENSOR_ATTR_2(vrm, S_IWUSR | S_IRUGO, show_vrm, store_vrm,
		      NOT_USED, NOT_USED),
	SENSOR_ATTR_2(chassis, S_IWUSR | S_IRUGO, show_alarm_beep,
		      store_chassis_clear, ALARM_STATUS, 30),
	SENSOR_ATTR_2(beep_enable, S_IWUSR | S_IRUGO, show_beep_enable,
		      store_beep_enable, NOT_USED, NOT_USED),
	SENSOR_ATTR_2(pwm_default, S_IWUSR | S_IRUGO, show_sf_setup,
		      store_sf_setup, SETUP_PWM_DEFAULT, NOT_USED),
	SENSOR_ATTR_2(pwm_uptime, S_IWUSR | S_IRUGO, show_sf_setup,
		      store_sf_setup, SETUP_PWM_UPTIME, NOT_USED),
	SENSOR_ATTR_2(pwm_downtime, S_IWUSR | S_IRUGO, show_sf_setup,
		      store_sf_setup, SETUP_PWM_DOWNTIME, NOT_USED),
	SENSOR_ATTR_2(temp_critical, S_IWUSR | S_IRUGO, show_sf_setup,
		      store_sf_setup, SETUP_TEMP_CRITICAL, NOT_USED),
};

static void w83793_init_client(struct i2c_client *client)
{
	if (reset) {
		w83793_write_value(client, W83793_REG_CONFIG, 0x80);
	}

	/* Start monitoring */
	w83793_write_value(client, W83793_REG_CONFIG,
			   w83793_read_value(client, W83793_REG_CONFIG) | 0x01);

}

static int w83793_attach_adapter(struct i2c_adapter *adapter)
{
	if (!(adapter->class & I2C_CLASS_HWMON))
		return 0;
	return i2c_probe(adapter, &addr_data, w83793_detect);
}

static int w83793_detach_client(struct i2c_client *client)
{
	struct w83793_data *data = i2c_get_clientdata(client);
	struct device *dev = &client->dev;
	int err, i;

	/* main client */
	if (data) {
		hwmon_device_unregister(data->class_dev);

		for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++)
			device_remove_file(dev,
					   &w83793_sensor_attr_2[i].dev_attr);

		for (i = 0; i < ARRAY_SIZE(sda_single_files); i++)
			device_remove_file(dev, &sda_single_files[i].dev_attr);

1087 1088 1089
		for (i = 0; i < ARRAY_SIZE(w83793_vid); i++)
			device_remove_file(dev, &w83793_vid[i].dev_attr);

1090 1091 1092 1093 1094
		for (i = 0; i < ARRAY_SIZE(w83793_left_fan); i++)
			device_remove_file(dev, &w83793_left_fan[i].dev_attr);

		for (i = 0; i < ARRAY_SIZE(w83793_left_pwm); i++)
			device_remove_file(dev, &w83793_left_pwm[i].dev_attr);
1095 1096 1097

		for (i = 0; i < ARRAY_SIZE(w83793_temp); i++)
			device_remove_file(dev, &w83793_temp[i].dev_attr);
1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209
	}

	if ((err = i2c_detach_client(client)))
		return err;

	/* main client */
	if (data)
		kfree(data);
	/* subclient */
	else
		kfree(client);

	return 0;
}

static int
w83793_create_subclient(struct i2c_adapter *adapter,
			struct i2c_client *client, int addr,
			struct i2c_client **sub_cli)
{
	int err = 0;
	struct i2c_client *sub_client;

	(*sub_cli) = sub_client =
	    kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
	if (!(sub_client)) {
		return -ENOMEM;
	}
	sub_client->addr = 0x48 + addr;
	i2c_set_clientdata(sub_client, NULL);
	sub_client->adapter = adapter;
	sub_client->driver = &w83793_driver;
	strlcpy(sub_client->name, "w83793 subclient", I2C_NAME_SIZE);
	if ((err = i2c_attach_client(sub_client))) {
		dev_err(&client->dev, "subclient registration "
			"at address 0x%x failed\n", sub_client->addr);
		kfree(sub_client);
	}
	return err;
}

static int
w83793_detect_subclients(struct i2c_adapter *adapter, int address,
			 int kind, struct i2c_client *client)
{
	int i, id, err;
	u8 tmp;
	struct w83793_data *data = i2c_get_clientdata(client);

	id = i2c_adapter_id(adapter);
	if (force_subclients[0] == id && force_subclients[1] == address) {
		for (i = 2; i <= 3; i++) {
			if (force_subclients[i] < 0x48
			    || force_subclients[i] > 0x4f) {
				dev_err(&client->dev,
					"invalid subclient "
					"address %d; must be 0x48-0x4f\n",
					force_subclients[i]);
				err = -EINVAL;
				goto ERROR_SC_0;
			}
		}
		w83793_write_value(client, W83793_REG_I2C_SUBADDR,
				   (force_subclients[2] & 0x07) |
				   ((force_subclients[3] & 0x07) << 4));
	}

	tmp = w83793_read_value(client, W83793_REG_I2C_SUBADDR);
	if (!(tmp & 0x08)) {
		err =
		    w83793_create_subclient(adapter, client, tmp & 0x7,
					    &data->lm75[0]);
		if (err < 0)
			goto ERROR_SC_0;
	}
	if (!(tmp & 0x80)) {
		if ((data->lm75[0] != NULL)
		    && ((tmp & 0x7) == ((tmp >> 4) & 0x7))) {
			dev_err(&client->dev,
				"duplicate addresses 0x%x, "
				"use force_subclients\n", data->lm75[0]->addr);
			err = -ENODEV;
			goto ERROR_SC_1;
		}
		err = w83793_create_subclient(adapter, client,
					      (tmp >> 4) & 0x7, &data->lm75[1]);
		if (err < 0)
			goto ERROR_SC_1;
	}

	return 0;

	/* Undo inits in case of errors */

ERROR_SC_1:
	if (data->lm75[0] != NULL) {
		i2c_detach_client(data->lm75[0]);
		kfree(data->lm75[0]);
	}
ERROR_SC_0:
	return err;
}

static int w83793_detect(struct i2c_adapter *adapter, int address, int kind)
{
	int i;
	u8 tmp, val;
	struct i2c_client *client;
	struct device *dev;
	struct w83793_data *data;
	int files_fan = ARRAY_SIZE(w83793_left_fan) / 7;
	int files_pwm = ARRAY_SIZE(w83793_left_pwm) / 5;
1210
	int files_temp = ARRAY_SIZE(w83793_temp) / 6;
1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336
	int err = 0;

	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
		goto exit;
	}

	/* OK. For now, we presume we have a valid client. We now create the
	   client structure, even though we cannot fill it completely yet.
	   But it allows us to access w83793_{read,write}_value. */

	if (!(data = kzalloc(sizeof(struct w83793_data), GFP_KERNEL))) {
		err = -ENOMEM;
		goto exit;
	}

	client = &data->client;
	dev = &client->dev;
	i2c_set_clientdata(client, data);
	client->addr = address;
	client->adapter = adapter;
	client->driver = &w83793_driver;

	data->bank = i2c_smbus_read_byte_data(client, W83793_REG_BANKSEL);

	/* Now, we do the remaining detection. */
	if (kind < 0) {
		tmp = data->bank & 0x80 ? 0x5c : 0xa3;
		/* Check Winbond vendor ID */
		if (tmp != i2c_smbus_read_byte_data(client,
							W83793_REG_VENDORID)) {
			pr_debug("w83793: Detection failed at check "
				 "vendor id\n");
			err = -ENODEV;
			goto free_mem;
		}

		/* If Winbond chip, address of chip and W83793_REG_I2C_ADDR
		   should match */
		if ((data->bank & 0x07) == 0
		 && i2c_smbus_read_byte_data(client, W83793_REG_I2C_ADDR) !=
		    (address << 1)) {
			pr_debug("w83793: Detection failed at check "
				 "i2c addr\n");
			err = -ENODEV;
			goto free_mem;
		}

	}

	/* We have either had a force parameter, or we have already detected the
	   Winbond. Determine the chip type now */

	if (kind <= 0) {
		if (0x7b == w83793_read_value(client, W83793_REG_CHIPID)) {
			kind = w83793;
		} else {
			if (kind == 0)
				dev_warn(&adapter->dev, "w83793: Ignoring "
					 "'force' parameter for unknown chip "
					 "at address 0x%02x\n", address);
			err = -ENODEV;
			goto free_mem;
		}
	}

	/* Fill in the remaining client fields and put into the global list */
	strlcpy(client->name, "w83793", I2C_NAME_SIZE);

	mutex_init(&data->update_lock);

	/* Tell the I2C layer a new client has arrived */
	if ((err = i2c_attach_client(client)))
		goto free_mem;

	if ((err = w83793_detect_subclients(adapter, address, kind, client)))
		goto detach_client;

	/* Initialize the chip */
	w83793_init_client(client);

	data->vrm = vid_which_vrm();
	/*
	   Only fan 1-5 has their own input pins,
	   Pwm 1-3 has their own pins
	 */
	data->has_fan = 0x1f;
	data->has_pwm = 0x07;
	tmp = w83793_read_value(client, W83793_REG_MFC);
	val = w83793_read_value(client, W83793_REG_FANIN_CTRL);

	/* check the function of pins 49-56 */
	if (!(tmp & 0x80)) {
		data->has_pwm |= 0x18;	/* pwm 4,5 */
		if (val & 0x01) {	/* fan 6 */
			data->has_fan |= 0x20;
			data->has_pwm |= 0x20;
		}
		if (val & 0x02) {	/* fan 7 */
			data->has_fan |= 0x40;
			data->has_pwm |= 0x40;
		}
		if (!(tmp & 0x40) && (val & 0x04)) {	/* fan 8 */
			data->has_fan |= 0x80;
			data->has_pwm |= 0x80;
		}
	}

	if (0x08 == (tmp & 0x0c)) {
		if (val & 0x08)	/* fan 9 */
			data->has_fan |= 0x100;
		if (val & 0x10)	/* fan 10 */
			data->has_fan |= 0x200;
	}

	if (0x20 == (tmp & 0x30)) {
		if (val & 0x20)	/* fan 11 */
			data->has_fan |= 0x400;
		if (val & 0x40)	/* fan 12 */
			data->has_fan |= 0x800;
	}

	if ((tmp & 0x01) && (val & 0x04)) {	/* fan 8, second location */
		data->has_fan |= 0x80;
		data->has_pwm |= 0x80;
	}

1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350
	tmp = w83793_read_value(client, W83793_REG_FANIN_SEL);
	if ((tmp & 0x01) && (val & 0x08)) {	/* fan 9, second location */
		data->has_fan |= 0x100;
	}
	if ((tmp & 0x02) && (val & 0x10)) {	/* fan 10, second location */
		data->has_fan |= 0x200;
	}
	if ((tmp & 0x04) && (val & 0x20)) {	/* fan 11, second location */
		data->has_fan |= 0x400;
	}
	if ((tmp & 0x08) && (val & 0x40)) {	/* fan 12, second location */
		data->has_fan |= 0x800;
	}

1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367
	/* check the temp1-6 mode, ignore former AMDSI selected inputs */
	tmp = w83793_read_value(client,W83793_REG_TEMP_MODE[0]);
	if (tmp & 0x01)
		data->has_temp |= 0x01;
	if (tmp & 0x04)
		data->has_temp |= 0x02;
	if (tmp & 0x10)
		data->has_temp |= 0x04;
	if (tmp & 0x40)
		data->has_temp |= 0x08;

	tmp = w83793_read_value(client,W83793_REG_TEMP_MODE[1]);
	if (tmp & 0x01)
		data->has_temp |= 0x10;
	if (tmp & 0x02)
		data->has_temp |= 0x20;

1368 1369 1370 1371 1372 1373 1374
	/* Detect the VID usage and ignore unused input */
	tmp = w83793_read_value(client, W83793_REG_MFC);
	if (!(tmp & 0x29))
		data->has_vid |= 0x1;	/* has VIDA */
	if (tmp & 0x80)
		data->has_vid |= 0x2;	/* has VIDB */

1375 1376 1377 1378 1379 1380 1381 1382
	/* Register sysfs hooks */
	for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++) {
		err = device_create_file(dev,
					 &w83793_sensor_attr_2[i].dev_attr);
		if (err)
			goto exit_remove;
	}

1383 1384 1385 1386 1387 1388 1389 1390
	for (i = 0; i < ARRAY_SIZE(w83793_vid); i++) {
		if (!(data->has_vid & (1 << i)))
			continue;
		err = device_create_file(dev, &w83793_vid[i].dev_attr);
		if (err)
			goto exit_remove;
	}

1391 1392 1393 1394 1395 1396 1397
	for (i = 0; i < ARRAY_SIZE(sda_single_files); i++) {
		err = device_create_file(dev, &sda_single_files[i].dev_attr);
		if (err)
			goto exit_remove;

	}

1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410
	for (i = 0; i < 6; i++) {
		int j;
		if (!(data->has_temp & (1 << i)))
			continue;
		for (j = 0; j < files_temp; j++) {
			err = device_create_file(dev,
						&w83793_temp[(i) * files_temp
								+ j].dev_attr);
			if (err)
				goto exit_remove;
		}
	}

1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453
	for (i = 5; i < 12; i++) {
		int j;
		if (!(data->has_fan & (1 << i)))
			continue;
		for (j = 0; j < files_fan; j++) {
			err = device_create_file(dev,
					   &w83793_left_fan[(i - 5) * files_fan
								+ j].dev_attr);
			if (err)
				goto exit_remove;
		}
	}

	for (i = 3; i < 8; i++) {
		int j;
		if (!(data->has_pwm & (1 << i)))
			continue;
		for (j = 0; j < files_pwm; j++) {
			err = device_create_file(dev,
					   &w83793_left_pwm[(i - 3) * files_pwm
								+ j].dev_attr);
			if (err)
				goto exit_remove;
		}
	}

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

	return 0;

	/* Unregister sysfs hooks */

exit_remove:
	for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++)
		device_remove_file(dev, &w83793_sensor_attr_2[i].dev_attr);

	for (i = 0; i < ARRAY_SIZE(sda_single_files); i++)
		device_remove_file(dev, &sda_single_files[i].dev_attr);

1454 1455 1456
	for (i = 0; i < ARRAY_SIZE(w83793_vid); i++)
		device_remove_file(dev, &w83793_vid[i].dev_attr);

1457 1458 1459 1460 1461 1462
	for (i = 0; i < ARRAY_SIZE(w83793_left_fan); i++)
		device_remove_file(dev, &w83793_left_fan[i].dev_attr);

	for (i = 0; i < ARRAY_SIZE(w83793_left_pwm); i++)
		device_remove_file(dev, &w83793_left_pwm[i].dev_attr);

1463 1464 1465
	for (i = 0; i < ARRAY_SIZE(w83793_temp); i++)
		device_remove_file(dev, &w83793_temp[i].dev_attr);

1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516
	if (data->lm75[0] != NULL) {
		i2c_detach_client(data->lm75[0]);
		kfree(data->lm75[0]);
	}
	if (data->lm75[1] != NULL) {
		i2c_detach_client(data->lm75[1]);
		kfree(data->lm75[1]);
	}
detach_client:
	i2c_detach_client(client);
free_mem:
	kfree(data);
exit:
	return err;
}

static void w83793_update_nonvolatile(struct device *dev)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct w83793_data *data = i2c_get_clientdata(client);
	int i, j;
	/*
	   They are somewhat "stable" registers, and to update them everytime
	   takes so much time, it's just not worthy. Update them in a long
	   interval to avoid exception.
	 */
	if (!(time_after(jiffies, data->last_nonvolatile + HZ * 300)
	      || !data->valid))
		return;
	/* update voltage limits */
	for (i = 1; i < 3; i++) {
		for (j = 0; j < ARRAY_SIZE(data->in); j++) {
			data->in[j][i] =
			    w83793_read_value(client, W83793_REG_IN[j][i]);
		}
		data->in_low_bits[i] =
		    w83793_read_value(client, W83793_REG_IN_LOW_BITS[i]);
	}

	for (i = 0; i < ARRAY_SIZE(data->fan_min); i++) {
		/* Update the Fan measured value and limits */
		if (!(data->has_fan & (1 << i))) {
			continue;
		}
		data->fan_min[i] =
		    w83793_read_value(client, W83793_REG_FAN_MIN(i)) << 8;
		data->fan_min[i] |=
		    w83793_read_value(client, W83793_REG_FAN_MIN(i) + 1);
	}

	for (i = 0; i < ARRAY_SIZE(data->temp_fan_map); i++) {
1517 1518
		if (!(data->has_temp & (1 << i)))
			continue;
1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600
		data->temp_fan_map[i] =
		    w83793_read_value(client, W83793_REG_TEMP_FAN_MAP(i));
		for (j = 1; j < 5; j++) {
			data->temp[i][j] =
			    w83793_read_value(client, W83793_REG_TEMP[i][j]);
		}
		data->temp_cruise[i] =
		    w83793_read_value(client, W83793_REG_TEMP_CRUISE(i));
		for (j = 0; j < 7; j++) {
			data->sf2_pwm[i][j] =
			    w83793_read_value(client, W83793_REG_SF2_PWM(i, j));
			data->sf2_temp[i][j] =
			    w83793_read_value(client,
					      W83793_REG_SF2_TEMP(i, j));
		}
	}

	for (i = 0; i < ARRAY_SIZE(data->temp_mode); i++)
		data->temp_mode[i] =
		    w83793_read_value(client, W83793_REG_TEMP_MODE[i]);

	for (i = 0; i < ARRAY_SIZE(data->tolerance); i++) {
		data->tolerance[i] =
		    w83793_read_value(client, W83793_REG_TEMP_TOL(i));
	}

	for (i = 0; i < ARRAY_SIZE(data->pwm); i++) {
		if (!(data->has_pwm & (1 << i)))
			continue;
		data->pwm[i][PWM_NONSTOP] =
		    w83793_read_value(client, W83793_REG_PWM(i, PWM_NONSTOP));
		data->pwm[i][PWM_START] =
		    w83793_read_value(client, W83793_REG_PWM(i, PWM_START));
		data->pwm_stop_time[i] =
		    w83793_read_value(client, W83793_REG_PWM_STOP_TIME(i));
	}

	data->pwm_default = w83793_read_value(client, W83793_REG_PWM_DEFAULT);
	data->pwm_enable = w83793_read_value(client, W83793_REG_PWM_ENABLE);
	data->pwm_uptime = w83793_read_value(client, W83793_REG_PWM_UPTIME);
	data->pwm_downtime = w83793_read_value(client, W83793_REG_PWM_DOWNTIME);
	data->temp_critical =
	    w83793_read_value(client, W83793_REG_TEMP_CRITICAL);
	data->beep_enable = w83793_read_value(client, W83793_REG_OVT_BEEP);

	for (i = 0; i < ARRAY_SIZE(data->beeps); i++) {
		data->beeps[i] = w83793_read_value(client, W83793_REG_BEEP(i));
	}

	data->last_nonvolatile = jiffies;
}

static struct w83793_data *w83793_update_device(struct device *dev)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct w83793_data *data = i2c_get_clientdata(client);
	int i;

	mutex_lock(&data->update_lock);

	if (!(time_after(jiffies, data->last_updated + HZ * 2)
	      || !data->valid))
		goto END;

	/* Update the voltages measured value and limits */
	for (i = 0; i < ARRAY_SIZE(data->in); i++)
		data->in[i][IN_READ] =
		    w83793_read_value(client, W83793_REG_IN[i][IN_READ]);

	data->in_low_bits[IN_READ] =
	    w83793_read_value(client, W83793_REG_IN_LOW_BITS[IN_READ]);

	for (i = 0; i < ARRAY_SIZE(data->fan); i++) {
		if (!(data->has_fan & (1 << i))) {
			continue;
		}
		data->fan[i] =
		    w83793_read_value(client, W83793_REG_FAN(i)) << 8;
		data->fan[i] |=
		    w83793_read_value(client, W83793_REG_FAN(i) + 1);
	}

1601 1602 1603
	for (i = 0; i < ARRAY_SIZE(data->temp); i++) {
		if (!(data->has_temp & (1 << i)))
			continue;
1604 1605
		data->temp[i][TEMP_READ] =
		    w83793_read_value(client, W83793_REG_TEMP[i][TEMP_READ]);
1606
	}
1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620

	data->temp_low_bits =
	    w83793_read_value(client, W83793_REG_TEMP_LOW_BITS);

	for (i = 0; i < ARRAY_SIZE(data->pwm); i++) {
		if (data->has_pwm & (1 << i))
			data->pwm[i][PWM_DUTY] =
			    w83793_read_value(client,
					      W83793_REG_PWM(i, PWM_DUTY));
	}

	for (i = 0; i < ARRAY_SIZE(data->alarms); i++)
		data->alarms[i] =
		    w83793_read_value(client, W83793_REG_ALARM(i));
1621 1622 1623 1624
	if (data->has_vid & 0x01)
		data->vid[0] = w83793_read_value(client, W83793_REG_VID_INA);
	if (data->has_vid & 0x02)
		data->vid[1] = w83793_read_value(client, W83793_REG_VID_INB);
1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702
	w83793_update_nonvolatile(dev);
	data->last_updated = jiffies;
	data->valid = 1;

END:
	mutex_unlock(&data->update_lock);
	return data;
}

/* Ignore the possibility that somebody change bank outside the driver
   Must be called with data->update_lock held, except during initialization */
static u8 w83793_read_value(struct i2c_client *client, u16 reg)
{
	struct w83793_data *data = i2c_get_clientdata(client);
	u8 res = 0xff;
	u8 new_bank = reg >> 8;

	new_bank |= data->bank & 0xfc;
	if (data->bank != new_bank) {
		if (i2c_smbus_write_byte_data
		    (client, W83793_REG_BANKSEL, new_bank) >= 0)
			data->bank = new_bank;
		else {
			dev_err(&client->dev,
				"set bank to %d failed, fall back "
				"to bank %d, read reg 0x%x error\n",
				new_bank, data->bank, reg);
			res = 0x0;	/* read 0x0 from the chip */
			goto END;
		}
	}
	res = i2c_smbus_read_byte_data(client, reg & 0xff);
END:
	return res;
}

/* Must be called with data->update_lock held, except during initialization */
static int w83793_write_value(struct i2c_client *client, u16 reg, u8 value)
{
	struct w83793_data *data = i2c_get_clientdata(client);
	int res;
	u8 new_bank = reg >> 8;

	new_bank |= data->bank & 0xfc;
	if (data->bank != new_bank) {
		if ((res = i2c_smbus_write_byte_data
		    (client, W83793_REG_BANKSEL, new_bank)) >= 0)
			data->bank = new_bank;
		else {
			dev_err(&client->dev,
				"set bank to %d failed, fall back "
				"to bank %d, write reg 0x%x error\n",
				new_bank, data->bank, reg);
			goto END;
		}
	}

	res = i2c_smbus_write_byte_data(client, reg & 0xff, value);
END:
	return res;
}

static int __init sensors_w83793_init(void)
{
	return i2c_add_driver(&w83793_driver);
}

static void __exit sensors_w83793_exit(void)
{
	i2c_del_driver(&w83793_driver);
}

MODULE_AUTHOR("Yuan Mu");
MODULE_DESCRIPTION("w83793 driver");
MODULE_LICENSE("GPL");

module_init(sensors_w83793_init);
module_exit(sensors_w83793_exit);