/*
    lm93.c - Part of lm_sensors, Linux kernel modules for hardware monitoring

    Author/Maintainer: Mark M. Hoffman <mhoffman@lightlink.com>
	Copyright (c) 2004 Utilitek Systems, Inc.

    derived in part from lm78.c:
	Copyright (c) 1998, 1999  Frodo Looijaard <frodol@dds.nl>

    derived in part from lm85.c:
	Copyright (c) 2002, 2003 Philip Pokorny <ppokorny@penguincomputing.com>
	Copyright (c) 2003       Margit Schubert-While <margitsw@t-online.de>

    derived in part from w83l785ts.c:
	Copyright (c) 2003-2004 Jean Delvare <khali@linux-fr.org>

    Ported to Linux 2.6 by Eric J. Bowersox <ericb@aspsys.com>
	Copyright (c) 2005 Aspen Systems, Inc.

    Adapted to 2.6.20 by Carsten Emde <cbe@osadl.org>
        Copyright (c) 2006 Carsten Emde, Open Source Automation Development Lab

    Modified for mainline integration by Hans J. Koch <hjk@linutronix.de>
        Copyright (c) 2007 Hans J. Koch, Linutronix GmbH

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

/* LM93 REGISTER ADDRESSES */

/* miscellaneous */
#define LM93_REG_MFR_ID			0x3e
#define LM93_REG_VER			0x3f
#define LM93_REG_STATUS_CONTROL		0xe2
#define LM93_REG_CONFIG			0xe3
#define LM93_REG_SLEEP_CONTROL		0xe4

/* alarm values start here */
#define LM93_REG_HOST_ERROR_1		0x48

/* voltage inputs: in1-in16 (nr => 0-15) */
#define LM93_REG_IN(nr)			(0x56 + (nr))
#define LM93_REG_IN_MIN(nr)		(0x90 + (nr) * 2)
#define LM93_REG_IN_MAX(nr)		(0x91 + (nr) * 2)

/* temperature inputs: temp1-temp4 (nr => 0-3) */
#define LM93_REG_TEMP(nr)		(0x50 + (nr))
#define LM93_REG_TEMP_MIN(nr)		(0x78 + (nr) * 2)
#define LM93_REG_TEMP_MAX(nr)		(0x79 + (nr) * 2)

/* temp[1-4]_auto_boost (nr => 0-3) */
#define LM93_REG_BOOST(nr)		(0x80 + (nr))

/* #PROCHOT inputs: prochot1-prochot2 (nr => 0-1) */
#define LM93_REG_PROCHOT_CUR(nr)	(0x67 + (nr) * 2)
#define LM93_REG_PROCHOT_AVG(nr)	(0x68 + (nr) * 2)
#define LM93_REG_PROCHOT_MAX(nr)	(0xb0 + (nr))

/* fan tach inputs: fan1-fan4 (nr => 0-3) */
#define LM93_REG_FAN(nr)		(0x6e + (nr) * 2)
#define LM93_REG_FAN_MIN(nr)		(0xb4 + (nr) * 2)

/* pwm outputs: pwm1-pwm2 (nr => 0-1, reg => 0-3) */
#define LM93_REG_PWM_CTL(nr,reg)	(0xc8 + (reg) + (nr) * 4)
#define LM93_PWM_CTL1	0x0
#define LM93_PWM_CTL2	0x1
#define LM93_PWM_CTL3	0x2
#define LM93_PWM_CTL4	0x3

/* GPIO input state */
#define LM93_REG_GPI			0x6b

/* vid inputs: vid1-vid2 (nr => 0-1) */
#define LM93_REG_VID(nr)		(0x6c + (nr))

/* vccp1 & vccp2: VID relative inputs (nr => 0-1) */
#define LM93_REG_VCCP_LIMIT_OFF(nr)	(0xb2 + (nr))

/* temp[1-4]_auto_boost_hyst */
#define LM93_REG_BOOST_HYST_12		0xc0
#define LM93_REG_BOOST_HYST_34		0xc1
#define LM93_REG_BOOST_HYST(nr)		(0xc0 + (nr)/2)

/* temp[1-4]_auto_pwm_[min|hyst] */
#define LM93_REG_PWM_MIN_HYST_12	0xc3
#define LM93_REG_PWM_MIN_HYST_34	0xc4
#define LM93_REG_PWM_MIN_HYST(nr)	(0xc3 + (nr)/2)

/* prochot_override & prochot_interval */
#define LM93_REG_PROCHOT_OVERRIDE	0xc6
#define LM93_REG_PROCHOT_INTERVAL	0xc7

/* temp[1-4]_auto_base (nr => 0-3) */
#define LM93_REG_TEMP_BASE(nr)		(0xd0 + (nr))

/* temp[1-4]_auto_offsets (step => 0-11) */
#define LM93_REG_TEMP_OFFSET(step)	(0xd4 + (step))

/* #PROCHOT & #VRDHOT PWM ramp control */
#define LM93_REG_PWM_RAMP_CTL		0xbf

/* miscellaneous */
#define LM93_REG_SFC1		0xbc
#define LM93_REG_SFC2		0xbd
#define LM93_REG_GPI_VID_CTL	0xbe
#define LM93_REG_SF_TACH_TO_PWM	0xe0

/* error masks */
#define LM93_REG_GPI_ERR_MASK	0xec
#define LM93_REG_MISC_ERR_MASK	0xed

/* LM93 REGISTER VALUES */
#define LM93_MFR_ID		0x73
#define LM93_MFR_ID_PROTOTYPE	0x72

/* SMBus capabilities */
#define LM93_SMBUS_FUNC_FULL (I2C_FUNC_SMBUS_BYTE_DATA | \
		I2C_FUNC_SMBUS_WORD_DATA | I2C_FUNC_SMBUS_BLOCK_DATA)
#define LM93_SMBUS_FUNC_MIN  (I2C_FUNC_SMBUS_BYTE_DATA | \
		I2C_FUNC_SMBUS_WORD_DATA)

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

/* Insmod parameters */

static int disable_block;
module_param(disable_block, bool, 0);
MODULE_PARM_DESC(disable_block,
	"Set to non-zero to disable SMBus block data transactions.");

static int init;
module_param(init, bool, 0);
MODULE_PARM_DESC(init, "Set to non-zero to force chip initialization.");

static int vccp_limit_type[2] = {0,0};
module_param_array(vccp_limit_type, int, NULL, 0);
MODULE_PARM_DESC(vccp_limit_type, "Configures in7 and in8 limit modes.");

static int vid_agtl;
module_param(vid_agtl, int, 0);
MODULE_PARM_DESC(vid_agtl, "Configures VID pin input thresholds.");

/* Driver data */
static struct i2c_driver lm93_driver;

/* LM93 BLOCK READ COMMANDS */
static const struct { u8 cmd; u8 len; } lm93_block_read_cmds[12] = {
	{ 0xf2,  8 },
	{ 0xf3,  8 },
	{ 0xf4,  6 },
	{ 0xf5, 16 },
	{ 0xf6,  4 },
	{ 0xf7,  8 },
	{ 0xf8, 12 },
	{ 0xf9, 32 },
	{ 0xfa,  8 },
	{ 0xfb,  8 },
	{ 0xfc, 16 },
	{ 0xfd,  9 },
};

/* ALARMS: SYSCTL format described further below
   REG: 64 bits in 8 registers, as immediately below */
struct block1_t {
	u8 host_status_1;
	u8 host_status_2;
	u8 host_status_3;
	u8 host_status_4;
	u8 p1_prochot_status;
	u8 p2_prochot_status;
	u8 gpi_status;
	u8 fan_status;
};

/*
 * Client-specific data
 */
struct lm93_data {
	struct device *hwmon_dev;

	struct mutex update_lock;
	unsigned long last_updated;	/* In jiffies */

	/* client update function */
	void (*update)(struct lm93_data *, struct i2c_client *);

	char valid; /* !=0 if following fields are valid */

	/* register values, arranged by block read groups */
	struct block1_t block1;

	/* temp1 - temp4: unfiltered readings
	   temp1 - temp2: filtered readings */
	u8 block2[6];

	/* vin1 - vin16: readings */
	u8 block3[16];

	/* prochot1 - prochot2: readings */
	struct {
		u8 cur;
		u8 avg;
	} block4[2];

	/* fan counts 1-4 => 14-bits, LE, *left* justified */
	u16 block5[4];

	/* block6 has a lot of data we don't need */
	struct {
		u8 min;
		u8 max;
	} temp_lim[4];

	/* vin1 - vin16: low and high limits */
	struct {
		u8 min;
		u8 max;
	} block7[16];

	/* fan count limits 1-4 => same format as block5 */
	u16 block8[4];

	/* pwm control registers (2 pwms, 4 regs) */
	u8 block9[2][4];

	/* auto/pwm base temp and offset temp registers */
	struct {
		u8 base[4];
		u8 offset[12];
	} block10;

	/* master config register */
	u8 config;

	/* VID1 & VID2 => register format, 6-bits, right justified */
	u8 vid[2];

	/* prochot1 - prochot2: limits */
	u8 prochot_max[2];

	/* vccp1 & vccp2 (in7 & in8): VID relative limits (register format) */
	u8 vccp_limits[2];

	/* GPIO input state (register format, i.e. inverted) */
	u8 gpi;

	/* #PROCHOT override (register format) */
	u8 prochot_override;

	/* #PROCHOT intervals (register format) */
	u8 prochot_interval;

	/* Fan Boost Temperatures (register format) */
	u8 boost[4];

	/* Fan Boost Hysteresis (register format) */
	u8 boost_hyst[2];

	/* Temperature Zone Min. PWM & Hysteresis (register format) */
	u8 auto_pwm_min_hyst[2];

	/* #PROCHOT & #VRDHOT PWM Ramp Control */
	u8 pwm_ramp_ctl;

	/* miscellaneous setup regs */
	u8 sfc1;
	u8 sfc2;
	u8 sf_tach_to_pwm;

	/* The two PWM CTL2  registers can read something other than what was
	   last written for the OVR_DC field (duty cycle override).  So, we
	   save the user-commanded value here. */
	u8 pwm_override[2];
};

/* VID:	mV
   REG: 6-bits, right justified, *always* using Intel VRM/VRD 10 */
static int LM93_VID_FROM_REG(u8 reg)
{
	return vid_from_reg((reg & 0x3f), 100);
}

/* min, max, and nominal register values, per channel (u8) */
static const u8 lm93_vin_reg_min[16] = {
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xae,
};
static const u8 lm93_vin_reg_max[16] = {
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
	0xff, 0xfa, 0xff, 0xff, 0xff, 0xff, 0xff, 0xd1,
};
/* Values from the datasheet. They're here for documentation only.
static const u8 lm93_vin_reg_nom[16] = {
	0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0,
	0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0x40, 0xc0,
};
*/

/* min, max, and nominal voltage readings, per channel (mV)*/
static const unsigned long lm93_vin_val_min[16] = {
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 3000,
};

static const unsigned long lm93_vin_val_max[16] = {
	1236, 1236, 1236, 1600, 2000, 2000, 1600, 1600,
	4400, 6500, 3333, 2625, 1312, 1312, 1236, 3600,
};
/* Values from the datasheet. They're here for documentation only.
static const unsigned long lm93_vin_val_nom[16] = {
	 927,  927,  927, 1200, 1500, 1500, 1200, 1200,
	3300, 5000, 2500, 1969,  984,  984,  309, 3300,
};
*/

static unsigned LM93_IN_FROM_REG(int nr, u8 reg)
{
	const long uV_max = lm93_vin_val_max[nr] * 1000;
	const long uV_min = lm93_vin_val_min[nr] * 1000;

	const long slope = (uV_max - uV_min) /
		(lm93_vin_reg_max[nr] - lm93_vin_reg_min[nr]);
	const long intercept = uV_min - slope * lm93_vin_reg_min[nr];

	return (slope * reg + intercept + 500) / 1000;
}

/* IN: mV, limits determined by channel nr
   REG: scaling determined by channel nr */
static u8 LM93_IN_TO_REG(int nr, unsigned val)
{
	/* range limit */
	const long mV = SENSORS_LIMIT(val,
		lm93_vin_val_min[nr], lm93_vin_val_max[nr]);

	/* try not to lose too much precision here */
	const long uV = mV * 1000;
	const long uV_max = lm93_vin_val_max[nr] * 1000;
	const long uV_min = lm93_vin_val_min[nr] * 1000;

	/* convert */
	const long slope = (uV_max - uV_min) /
		(lm93_vin_reg_max[nr] - lm93_vin_reg_min[nr]);
	const long intercept = uV_min - slope * lm93_vin_reg_min[nr];

	u8 result = ((uV - intercept + (slope/2)) / slope);
	result = SENSORS_LIMIT(result,
			lm93_vin_reg_min[nr], lm93_vin_reg_max[nr]);
	return result;
}

/* vid in mV, upper == 0 indicates low limit, otherwise upper limit */
static unsigned LM93_IN_REL_FROM_REG(u8 reg, int upper, int vid)
{
	const long uV_offset = upper ? (((reg >> 4 & 0x0f) + 1) * 12500) :
				(((reg >> 0 & 0x0f) + 1) * -25000);
	const long uV_vid = vid * 1000;
	return (uV_vid + uV_offset + 5000) / 10000;
}

#define LM93_IN_MIN_FROM_REG(reg,vid)	LM93_IN_REL_FROM_REG(reg,0,vid)
#define LM93_IN_MAX_FROM_REG(reg,vid)	LM93_IN_REL_FROM_REG(reg,1,vid)

/* vid in mV , upper == 0 indicates low limit, otherwise upper limit
   upper also determines which nibble of the register is returned
   (the other nibble will be 0x0) */
static u8 LM93_IN_REL_TO_REG(unsigned val, int upper, int vid)
{
	long uV_offset = vid * 1000 - val * 10000;
	if (upper) {
		uV_offset = SENSORS_LIMIT(uV_offset, 12500, 200000);
		return (u8)((uV_offset /  12500 - 1) << 4);
	} else {
		uV_offset = SENSORS_LIMIT(uV_offset, -400000, -25000);
		return (u8)((uV_offset / -25000 - 1) << 0);
	}
}

/* TEMP: 1/1000 degrees C (-128C to +127C)
   REG: 1C/bit, two's complement */
static int LM93_TEMP_FROM_REG(u8 reg)
{
	return (s8)reg * 1000;
}

#define LM93_TEMP_MIN (-128000)
#define LM93_TEMP_MAX ( 127000)

/* TEMP: 1/1000 degrees C (-128C to +127C)
   REG: 1C/bit, two's complement */
static u8 LM93_TEMP_TO_REG(long temp)
{
	int ntemp = SENSORS_LIMIT(temp, LM93_TEMP_MIN, LM93_TEMP_MAX);
	ntemp += (ntemp<0 ? -500 : 500);
	return (u8)(ntemp / 1000);
}

/* Determine 4-bit temperature offset resolution */
static int LM93_TEMP_OFFSET_MODE_FROM_REG(u8 sfc2, int nr)
{
	/* mode: 0 => 1C/bit, nonzero => 0.5C/bit */
	return sfc2 & (nr < 2 ? 0x10 : 0x20);
}

/* This function is common to all 4-bit temperature offsets
   reg is 4 bits right justified
   mode 0 => 1C/bit, mode !0 => 0.5C/bit */
static int LM93_TEMP_OFFSET_FROM_REG(u8 reg, int mode)
{
	return (reg & 0x0f) * (mode ? 5 : 10);
}

#define LM93_TEMP_OFFSET_MIN  (  0)
#define LM93_TEMP_OFFSET_MAX0 (150)
#define LM93_TEMP_OFFSET_MAX1 ( 75)

/* This function is common to all 4-bit temperature offsets
   returns 4 bits right justified
   mode 0 => 1C/bit, mode !0 => 0.5C/bit */
static u8 LM93_TEMP_OFFSET_TO_REG(int off, int mode)
{
	int factor = mode ? 5 : 10;

	off = SENSORS_LIMIT(off, LM93_TEMP_OFFSET_MIN,
		mode ? LM93_TEMP_OFFSET_MAX1 : LM93_TEMP_OFFSET_MAX0);
	return (u8)((off + factor/2) / factor);
}

/* 0 <= nr <= 3 */
static int LM93_TEMP_AUTO_OFFSET_FROM_REG(u8 reg, int nr, int mode)
{
	/* temp1-temp2 (nr=0,1) use lower nibble */
	if (nr < 2)
		return LM93_TEMP_OFFSET_FROM_REG(reg & 0x0f, mode);

	/* temp3-temp4 (nr=2,3) use upper nibble */
	else
		return LM93_TEMP_OFFSET_FROM_REG(reg >> 4 & 0x0f, mode);
}

/* TEMP: 1/10 degrees C (0C to +15C (mode 0) or +7.5C (mode non-zero))
   REG: 1.0C/bit (mode 0) or 0.5C/bit (mode non-zero)
   0 <= nr <= 3 */
static u8 LM93_TEMP_AUTO_OFFSET_TO_REG(u8 old, int off, int nr, int mode)
{
	u8 new = LM93_TEMP_OFFSET_TO_REG(off, mode);

	/* temp1-temp2 (nr=0,1) use lower nibble */
	if (nr < 2)
		return (old & 0xf0) | (new & 0x0f);

	/* temp3-temp4 (nr=2,3) use upper nibble */
	else
		return (new << 4 & 0xf0) | (old & 0x0f);
}

static int LM93_AUTO_BOOST_HYST_FROM_REGS(struct lm93_data *data, int nr,
		int mode)
{
	u8 reg;

	switch (nr) {
	case 0:
		reg = data->boost_hyst[0] & 0x0f;
		break;
	case 1:
		reg = data->boost_hyst[0] >> 4 & 0x0f;
		break;
	case 2:
		reg = data->boost_hyst[1] & 0x0f;
		break;
	case 3:
	default:
		reg = data->boost_hyst[1] >> 4 & 0x0f;
		break;
	}

	return LM93_TEMP_FROM_REG(data->boost[nr]) -
			LM93_TEMP_OFFSET_FROM_REG(reg, mode);
}

static u8 LM93_AUTO_BOOST_HYST_TO_REG(struct lm93_data *data, long hyst,
		int nr, int mode)
{
	u8 reg = LM93_TEMP_OFFSET_TO_REG(
			(LM93_TEMP_FROM_REG(data->boost[nr]) - hyst), mode);

	switch (nr) {
	case 0:
		reg = (data->boost_hyst[0] & 0xf0) | (reg & 0x0f);
		break;
	case 1:
		reg = (reg << 4 & 0xf0) | (data->boost_hyst[0] & 0x0f);
		break;
	case 2:
		reg = (data->boost_hyst[1] & 0xf0) | (reg & 0x0f);
		break;
	case 3:
	default:
		reg = (reg << 4 & 0xf0) | (data->boost_hyst[1] & 0x0f);
		break;
	}

	return reg;
}

/* PWM: 0-255 per sensors documentation
   REG: 0-13 as mapped below... right justified */
typedef enum { LM93_PWM_MAP_HI_FREQ, LM93_PWM_MAP_LO_FREQ } pwm_freq_t;
static int lm93_pwm_map[2][16] = {
	{
		0x00, /*   0.00% */ 0x40, /*  25.00% */
		0x50, /*  31.25% */ 0x60, /*  37.50% */
		0x70, /*  43.75% */ 0x80, /*  50.00% */
		0x90, /*  56.25% */ 0xa0, /*  62.50% */
		0xb0, /*  68.75% */ 0xc0, /*  75.00% */
		0xd0, /*  81.25% */ 0xe0, /*  87.50% */
		0xf0, /*  93.75% */ 0xff, /* 100.00% */
		0xff, 0xff, /* 14, 15 are reserved and should never occur */
	},
	{
		0x00, /*   0.00% */ 0x40, /*  25.00% */
		0x49, /*  28.57% */ 0x52, /*  32.14% */
		0x5b, /*  35.71% */ 0x64, /*  39.29% */
		0x6d, /*  42.86% */ 0x76, /*  46.43% */
		0x80, /*  50.00% */ 0x89, /*  53.57% */
		0x92, /*  57.14% */ 0xb6, /*  71.43% */
		0xdb, /*  85.71% */ 0xff, /* 100.00% */
		0xff, 0xff, /* 14, 15 are reserved and should never occur */
	},
};

static int LM93_PWM_FROM_REG(u8 reg, pwm_freq_t freq)
{
	return lm93_pwm_map[freq][reg & 0x0f];
}

/* round up to nearest match */
static u8 LM93_PWM_TO_REG(int pwm, pwm_freq_t freq)
{
	int i;
	for (i = 0; i < 13; i++)
		if (pwm <= lm93_pwm_map[freq][i])
			break;

	/* can fall through with i==13 */
	return (u8)i;
}

static int LM93_FAN_FROM_REG(u16 regs)
{
	const u16 count = le16_to_cpu(regs) >> 2;
	return count==0 ? -1 : count==0x3fff ? 0: 1350000 / count;
}

/*
 * RPM: (82.5 to 1350000)
 * REG: 14-bits, LE, *left* justified
 */
static u16 LM93_FAN_TO_REG(long rpm)
{
	u16 count, regs;

	if (rpm == 0) {
		count = 0x3fff;
	} else {
		rpm = SENSORS_LIMIT(rpm, 1, 1000000);
		count = SENSORS_LIMIT((1350000 + rpm) / rpm, 1, 0x3ffe);
	}

	regs = count << 2;
	return cpu_to_le16(regs);
}

/* PWM FREQ: HZ
   REG: 0-7 as mapped below */
static int lm93_pwm_freq_map[8] = {
	22500, 96, 84, 72, 60, 48, 36, 12
};

static int LM93_PWM_FREQ_FROM_REG(u8 reg)
{
	return lm93_pwm_freq_map[reg & 0x07];
}

/* round up to nearest match */
static u8 LM93_PWM_FREQ_TO_REG(int freq)
{
	int i;
	for (i = 7; i > 0; i--)
		if (freq <= lm93_pwm_freq_map[i])
			break;

	/* can fall through with i==0 */
	return (u8)i;
}

/* TIME: 1/100 seconds
 * REG: 0-7 as mapped below */
static int lm93_spinup_time_map[8] = {
	0, 10, 25, 40, 70, 100, 200, 400,
};

static int LM93_SPINUP_TIME_FROM_REG(u8 reg)
{
	return lm93_spinup_time_map[reg >> 5 & 0x07];
}

/* round up to nearest match */
static u8 LM93_SPINUP_TIME_TO_REG(int time)
{
	int i;
	for (i = 0; i < 7; i++)
		if (time <= lm93_spinup_time_map[i])
			break;

	/* can fall through with i==8 */
	return (u8)i;
}

#define LM93_RAMP_MIN 0
#define LM93_RAMP_MAX 75

static int LM93_RAMP_FROM_REG(u8 reg)
{
	return (reg & 0x0f) * 5;
}

/* RAMP: 1/100 seconds
   REG: 50mS/bit 4-bits right justified */
static u8 LM93_RAMP_TO_REG(int ramp)
{
	ramp = SENSORS_LIMIT(ramp, LM93_RAMP_MIN, LM93_RAMP_MAX);
	return (u8)((ramp + 2) / 5);
}

/* PROCHOT: 0-255, 0 => 0%, 255 => > 96.6%
 * REG: (same) */
static u8 LM93_PROCHOT_TO_REG(long prochot)
{
	prochot = SENSORS_LIMIT(prochot, 0, 255);
	return (u8)prochot;
}

/* PROCHOT-INTERVAL: 73 - 37200 (1/100 seconds)
 * REG: 0-9 as mapped below */
static int lm93_interval_map[10] = {
	73, 146, 290, 580, 1170, 2330, 4660, 9320, 18600, 37200,
};

static int LM93_INTERVAL_FROM_REG(u8 reg)
{
	return lm93_interval_map[reg & 0x0f];
}

/* round up to nearest match */
static u8 LM93_INTERVAL_TO_REG(long interval)
{
	int i;
	for (i = 0; i < 9; i++)
		if (interval <= lm93_interval_map[i])
			break;

	/* can fall through with i==9 */
	return (u8)i;
}

/* GPIO: 0-255, GPIO0 is LSB
 * REG: inverted */
static unsigned LM93_GPI_FROM_REG(u8 reg)
{
	return ~reg & 0xff;
}

/* alarm bitmask definitions
   The LM93 has nearly 64 bits of error status... I've pared that down to
   what I think is a useful subset in order to fit it into 32 bits.

   Especially note that the #VRD_HOT alarms are missing because we provide
   that information as values in another sysfs file.

   If libsensors is extended to support 64 bit values, this could be revisited.
*/
#define LM93_ALARM_IN1		0x00000001
#define LM93_ALARM_IN2		0x00000002
#define LM93_ALARM_IN3		0x00000004
#define LM93_ALARM_IN4		0x00000008
#define LM93_ALARM_IN5		0x00000010
#define LM93_ALARM_IN6		0x00000020
#define LM93_ALARM_IN7		0x00000040
#define LM93_ALARM_IN8		0x00000080
#define LM93_ALARM_IN9		0x00000100
#define LM93_ALARM_IN10		0x00000200
#define LM93_ALARM_IN11		0x00000400
#define LM93_ALARM_IN12		0x00000800
#define LM93_ALARM_IN13		0x00001000
#define LM93_ALARM_IN14		0x00002000
#define LM93_ALARM_IN15		0x00004000
#define LM93_ALARM_IN16		0x00008000
#define LM93_ALARM_FAN1		0x00010000
#define LM93_ALARM_FAN2		0x00020000
#define LM93_ALARM_FAN3		0x00040000
#define LM93_ALARM_FAN4		0x00080000
#define LM93_ALARM_PH1_ERR	0x00100000
#define LM93_ALARM_PH2_ERR	0x00200000
#define LM93_ALARM_SCSI1_ERR	0x00400000
#define LM93_ALARM_SCSI2_ERR	0x00800000
#define LM93_ALARM_DVDDP1_ERR	0x01000000
#define LM93_ALARM_DVDDP2_ERR	0x02000000
#define LM93_ALARM_D1_ERR	0x04000000
#define LM93_ALARM_D2_ERR	0x08000000
#define LM93_ALARM_TEMP1	0x10000000
#define LM93_ALARM_TEMP2	0x20000000
#define LM93_ALARM_TEMP3	0x40000000

static unsigned LM93_ALARMS_FROM_REG(struct block1_t b1)
{
	unsigned result;
	result  = b1.host_status_2 & 0x3f;

	if (vccp_limit_type[0])
		result |= (b1.host_status_4 & 0x10) << 2;
	else
		result |= b1.host_status_2 & 0x40;

	if (vccp_limit_type[1])
		result |= (b1.host_status_4 & 0x20) << 2;
	else
		result |= b1.host_status_2 & 0x80;

	result |= b1.host_status_3 << 8;
	result |= (b1.fan_status & 0x0f) << 16;
	result |= (b1.p1_prochot_status & 0x80) << 13;
	result |= (b1.p2_prochot_status & 0x80) << 14;
	result |= (b1.host_status_4 & 0xfc) << 20;
	result |= (b1.host_status_1 & 0x07) << 28;
	return result;
}

#define MAX_RETRIES 5

static u8 lm93_read_byte(struct i2c_client *client, u8 reg)
{
	int value, i;

	/* retry in case of read errors */
	for (i=1; i<=MAX_RETRIES; i++) {
		if ((value = i2c_smbus_read_byte_data(client, reg)) >= 0) {
			return value;
		} else {
			dev_warn(&client->dev,"lm93: read byte data failed, "
				"address 0x%02x.\n", reg);
			mdelay(i + 3);
		}

	}

	/* <TODO> what to return in case of error? */
	dev_err(&client->dev,"lm93: All read byte retries failed!!\n");
	return 0;
}

static int lm93_write_byte(struct i2c_client *client, u8 reg, u8 value)
{
	int result;

	/* <TODO> how to handle write errors? */
	result = i2c_smbus_write_byte_data(client, reg, value);

	if (result < 0)
		dev_warn(&client->dev,"lm93: write byte data failed, "
			 "0x%02x at address 0x%02x.\n", value, reg);

	return result;
}

static u16 lm93_read_word(struct i2c_client *client, u8 reg)
{
	int value, i;

	/* retry in case of read errors */
	for (i=1; i<=MAX_RETRIES; i++) {
		if ((value = i2c_smbus_read_word_data(client, reg)) >= 0) {
			return value;
		} else {
			dev_warn(&client->dev,"lm93: read word data failed, "
				 "address 0x%02x.\n", reg);
			mdelay(i + 3);
		}

	}

	/* <TODO> what to return in case of error? */
	dev_err(&client->dev,"lm93: All read word retries failed!!\n");
	return 0;
}

static int lm93_write_word(struct i2c_client *client, u8 reg, u16 value)
{
	int result;

	/* <TODO> how to handle write errors? */
	result = i2c_smbus_write_word_data(client, reg, value);

	if (result < 0)
		dev_warn(&client->dev,"lm93: write word data failed, "
			 "0x%04x at address 0x%02x.\n", value, reg);

	return result;
}

static u8 lm93_block_buffer[I2C_SMBUS_BLOCK_MAX];

/*
	read block data into values, retry if not expected length
	fbn => index to lm93_block_read_cmds table
		(Fixed Block Number - section 14.5.2 of LM93 datasheet)
*/
static void lm93_read_block(struct i2c_client *client, u8 fbn, u8 *values)
{
	int i, result=0;

	for (i = 1; i <= MAX_RETRIES; i++) {
		result = i2c_smbus_read_block_data(client,
			lm93_block_read_cmds[fbn].cmd, lm93_block_buffer);

		if (result == lm93_block_read_cmds[fbn].len) {
			break;
		} else {
			dev_warn(&client->dev,"lm93: block read data failed, "
				 "command 0x%02x.\n",
				 lm93_block_read_cmds[fbn].cmd);
			mdelay(i + 3);
		}
	}

	if (result == lm93_block_read_cmds[fbn].len) {
		memcpy(values,lm93_block_buffer,lm93_block_read_cmds[fbn].len);
	} else {
		/* <TODO> what to do in case of error? */
	}
}

static struct lm93_data *lm93_update_device(struct device *dev)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct lm93_data *data = i2c_get_clientdata(client);
	const unsigned long interval = HZ + (HZ / 2);

	mutex_lock(&data->update_lock);

	if (time_after(jiffies, data->last_updated + interval) ||
		!data->valid) {

		data->update(data, client);
		data->last_updated = jiffies;
		data->valid = 1;
	}

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

/* update routine for data that has no corresponding SMBus block command */
static void lm93_update_client_common(struct lm93_data *data,
				      struct i2c_client *client)
{
	int i;
	u8 *ptr;

	/* temp1 - temp4: limits */
	for (i = 0; i < 4; i++) {
		data->temp_lim[i].min =
			lm93_read_byte(client, LM93_REG_TEMP_MIN(i));
		data->temp_lim[i].max =
			lm93_read_byte(client, LM93_REG_TEMP_MAX(i));
	}

	/* config register */
	data->config = lm93_read_byte(client, LM93_REG_CONFIG);

	/* vid1 - vid2: values */
	for (i = 0; i < 2; i++)
		data->vid[i] = lm93_read_byte(client, LM93_REG_VID(i));

	/* prochot1 - prochot2: limits */
	for (i = 0; i < 2; i++)
		data->prochot_max[i] = lm93_read_byte(client,
				LM93_REG_PROCHOT_MAX(i));

	/* vccp1 - vccp2: VID relative limits */
	for (i = 0; i < 2; i++)
		data->vccp_limits[i] = lm93_read_byte(client,
				LM93_REG_VCCP_LIMIT_OFF(i));

	/* GPIO input state */
	data->gpi = lm93_read_byte(client, LM93_REG_GPI);

	/* #PROCHOT override state */
	data->prochot_override = lm93_read_byte(client,
			LM93_REG_PROCHOT_OVERRIDE);

	/* #PROCHOT intervals */
	data->prochot_interval = lm93_read_byte(client,
			LM93_REG_PROCHOT_INTERVAL);

	/* Fan Boost Temperature registers */
	for (i = 0; i < 4; i++)
		data->boost[i] = lm93_read_byte(client, LM93_REG_BOOST(i));

	/* Fan Boost Temperature Hyst. registers */
	data->boost_hyst[0] = lm93_read_byte(client, LM93_REG_BOOST_HYST_12);
	data->boost_hyst[1] = lm93_read_byte(client, LM93_REG_BOOST_HYST_34);

	/* Temperature Zone Min. PWM & Hysteresis registers */
	data->auto_pwm_min_hyst[0] =
			lm93_read_byte(client, LM93_REG_PWM_MIN_HYST_12);
	data->auto_pwm_min_hyst[1] =
			lm93_read_byte(client, LM93_REG_PWM_MIN_HYST_34);

	/* #PROCHOT & #VRDHOT PWM Ramp Control register */
	data->pwm_ramp_ctl = lm93_read_byte(client, LM93_REG_PWM_RAMP_CTL);

	/* misc setup registers */
	data->sfc1 = lm93_read_byte(client, LM93_REG_SFC1);
	data->sfc2 = lm93_read_byte(client, LM93_REG_SFC2);
	data->sf_tach_to_pwm = lm93_read_byte(client,
			LM93_REG_SF_TACH_TO_PWM);

	/* write back alarm values to clear */
	for (i = 0, ptr = (u8 *)(&data->block1); i < 8; i++)
		lm93_write_byte(client, LM93_REG_HOST_ERROR_1 + i, *(ptr + i));
}

/* update routine which uses SMBus block data commands */
static void lm93_update_client_full(struct lm93_data *data,
				    struct i2c_client *client)
{
	dev_dbg(&client->dev,"starting device update (block data enabled)\n");

	/* in1 - in16: values & limits */
	lm93_read_block(client, 3, (u8 *)(data->block3));
	lm93_read_block(client, 7, (u8 *)(data->block7));

	/* temp1 - temp4: values */
	lm93_read_block(client, 2, (u8 *)(data->block2));

	/* prochot1 - prochot2: values */
	lm93_read_block(client, 4, (u8 *)(data->block4));

	/* fan1 - fan4: values & limits */
	lm93_read_block(client, 5, (u8 *)(data->block5));
	lm93_read_block(client, 8, (u8 *)(data->block8));

	/* pmw control registers */
	lm93_read_block(client, 9, (u8 *)(data->block9));

	/* alarm values */
	lm93_read_block(client, 1, (u8 *)(&data->block1));

	/* auto/pwm registers */
	lm93_read_block(client, 10, (u8 *)(&data->block10));

	lm93_update_client_common(data, client);
}

/* update routine which uses SMBus byte/word data commands only */
static void lm93_update_client_min(struct lm93_data *data,
				   struct i2c_client *client)
{
	int i,j;
	u8 *ptr;

	dev_dbg(&client->dev,"starting device update (block data disabled)\n");

	/* in1 - in16: values & limits */
	for (i = 0; i < 16; i++) {
		data->block3[i] =
			lm93_read_byte(client, LM93_REG_IN(i));
		data->block7[i].min =
			lm93_read_byte(client, LM93_REG_IN_MIN(i));
		data->block7[i].max =
			lm93_read_byte(client, LM93_REG_IN_MAX(i));
	}

	/* temp1 - temp4: values */
	for (i = 0; i < 4; i++) {
		data->block2[i] =
			lm93_read_byte(client, LM93_REG_TEMP(i));
	}

	/* prochot1 - prochot2: values */
	for (i = 0; i < 2; i++) {
		data->block4[i].cur =
			lm93_read_byte(client, LM93_REG_PROCHOT_CUR(i));
		data->block4[i].avg =
			lm93_read_byte(client, LM93_REG_PROCHOT_AVG(i));
	}

	/* fan1 - fan4: values & limits */
	for (i = 0; i < 4; i++) {
		data->block5[i] =
			lm93_read_word(client, LM93_REG_FAN(i));
		data->block8[i] =
			lm93_read_word(client, LM93_REG_FAN_MIN(i));
	}

	/* pwm control registers */
	for (i = 0; i < 2; i++) {
		for (j = 0; j < 4; j++) {
			data->block9[i][j] =
				lm93_read_byte(client, LM93_REG_PWM_CTL(i,j));
		}
	}

	/* alarm values */
	for (i = 0, ptr = (u8 *)(&data->block1); i < 8; i++) {
		*(ptr + i) =
			lm93_read_byte(client, LM93_REG_HOST_ERROR_1 + i);
	}

	/* auto/pwm (base temp) registers */
	for (i = 0; i < 4; i++) {
		data->block10.base[i] =
			lm93_read_byte(client, LM93_REG_TEMP_BASE(i));
	}

	/* auto/pwm (offset temp) registers */
	for (i = 0; i < 12; i++) {
		data->block10.offset[i] =
			lm93_read_byte(client, LM93_REG_TEMP_OFFSET(i));
	}

	lm93_update_client_common(data, client);
}

/* following are the sysfs callback functions */
static ssize_t show_in(struct device *dev, struct device_attribute *attr,
			char *buf)
{
	int nr = (to_sensor_dev_attr(attr))->index;

	struct lm93_data *data = lm93_update_device(dev);
	return sprintf(buf, "%d\n", LM93_IN_FROM_REG(nr, data->block3[nr]));
}

static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in, NULL, 0);
static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in, NULL, 1);
static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in, NULL, 2);
static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, show_in, NULL, 3);
static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, show_in, NULL, 4);
static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, show_in, NULL, 5);
static SENSOR_DEVICE_ATTR(in7_input, S_IRUGO, show_in, NULL, 6);
static SENSOR_DEVICE_ATTR(in8_input, S_IRUGO, show_in, NULL, 7);
static SENSOR_DEVICE_ATTR(in9_input, S_IRUGO, show_in, NULL, 8);
static SENSOR_DEVICE_ATTR(in10_input, S_IRUGO, show_in, NULL, 9);
static SENSOR_DEVICE_ATTR(in11_input, S_IRUGO, show_in, NULL, 10);
static SENSOR_DEVICE_ATTR(in12_input, S_IRUGO, show_in, NULL, 11);
static SENSOR_DEVICE_ATTR(in13_input, S_IRUGO, show_in, NULL, 12);
static SENSOR_DEVICE_ATTR(in14_input, S_IRUGO, show_in, NULL, 13);
static SENSOR_DEVICE_ATTR(in15_input, S_IRUGO, show_in, NULL, 14);
static SENSOR_DEVICE_ATTR(in16_input, S_IRUGO, show_in, NULL, 15);

static ssize_t show_in_min(struct device *dev,
			struct device_attribute *attr, char *buf)
{
	int nr = (to_sensor_dev_attr(attr))->index;
	struct lm93_data *data = lm93_update_device(dev);
	int vccp = nr - 6;
	long rc, vid;

	if ((nr==6 || nr==7) && (vccp_limit_type[vccp])) {
		vid = LM93_VID_FROM_REG(data->vid[vccp]);
		rc = LM93_IN_MIN_FROM_REG(data->vccp_limits[vccp], vid);
	}
	else {
		rc = LM93_IN_FROM_REG(nr, data->block7[nr].min); \
	}
	return sprintf(buf, "%ld\n", rc); \
}

static ssize_t store_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 lm93_data *data = i2c_get_clientdata(client);
	u32 val = simple_strtoul(buf, NULL, 10);
	int vccp = nr - 6;
	long vid;

	mutex_lock(&data->update_lock);
	if ((nr==6 || nr==7) && (vccp_limit_type[vccp])) {
		vid = LM93_VID_FROM_REG(data->vid[vccp]);
		data->vccp_limits[vccp] = (data->vccp_limits[vccp] & 0xf0) |
				LM93_IN_REL_TO_REG(val, 0, vid);
		lm93_write_byte(client, LM93_REG_VCCP_LIMIT_OFF(vccp),
				data->vccp_limits[vccp]);
	}
	else {
		data->block7[nr].min = LM93_IN_TO_REG(nr,val);
		lm93_write_byte(client, LM93_REG_IN_MIN(nr),
				data->block7[nr].min);
	}
	mutex_unlock(&data->update_lock);
	return count;
}

static SENSOR_DEVICE_ATTR(in1_min, S_IWUSR | S_IRUGO,
			  show_in_min, store_in_min, 0);
static SENSOR_DEVICE_ATTR(in2_min, S_IWUSR | S_IRUGO,
			  show_in_min, store_in_min, 1);
static SENSOR_DEVICE_ATTR(in3_min, S_IWUSR | S_IRUGO,
			  show_in_min, store_in_min, 2);
static SENSOR_DEVICE_ATTR(in4_min, S_IWUSR | S_IRUGO,
			  show_in_min, store_in_min, 3);
static SENSOR_DEVICE_ATTR(in5_min, S_IWUSR | S_IRUGO,
			  show_in_min, store_in_min, 4);
static SENSOR_DEVICE_ATTR(in6_min, S_IWUSR | S_IRUGO,
			  show_in_min, store_in_min, 5);
static SENSOR_DEVICE_ATTR(in7_min, S_IWUSR | S_IRUGO,
			  show_in_min, store_in_min, 6);
static SENSOR_DEVICE_ATTR(in8_min, S_IWUSR | S_IRUGO,
			  show_in_min, store_in_min, 7);
static SENSOR_DEVICE_ATTR(in9_min, S_IWUSR | S_IRUGO,
			  show_in_min, store_in_min, 8);
static SENSOR_DEVICE_ATTR(in10_min, S_IWUSR | S_IRUGO,
			  show_in_min, store_in_min, 9);
static SENSOR_DEVICE_ATTR(in11_min, S_IWUSR | S_IRUGO,
			  show_in_min, store_in_min, 10);
static SENSOR_DEVICE_ATTR(in12_min, S_IWUSR | S_IRUGO,
			  show_in_min, store_in_min, 11);
static SENSOR_DEVICE_ATTR(in13_min, S_IWUSR | S_IRUGO,
			  show_in_min, store_in_min, 12);
static SENSOR_DEVICE_ATTR(in14_min, S_IWUSR | S_IRUGO,
			  show_in_min, store_in_min, 13);
static SENSOR_DEVICE_ATTR(in15_min, S_IWUSR | S_IRUGO,
			  show_in_min, store_in_min, 14);
static SENSOR_DEVICE_ATTR(in16_min, S_IWUSR | S_IRUGO,
			  show_in_min, store_in_min, 15);

static ssize_t show_in_max(struct device *dev,
			   struct device_attribute *attr, char *buf)
{
	int nr = (to_sensor_dev_attr(attr))->index;
	struct lm93_data *data = lm93_update_device(dev);
	int vccp = nr - 6;
	long rc, vid;

	if ((nr==6 || nr==7) && (vccp_limit_type[vccp])) {
		vid = LM93_VID_FROM_REG(data->vid[vccp]);
		rc = LM93_IN_MAX_FROM_REG(data->vccp_limits[vccp],vid);
	}
	else {
		rc = LM93_IN_FROM_REG(nr,data->block7[nr].max); \
	}
	return sprintf(buf,"%ld\n",rc); \
}

static ssize_t store_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 lm93_data *data = i2c_get_clientdata(client);
	u32 val = simple_strtoul(buf, NULL, 10);
	int vccp = nr - 6;
	long vid;

	mutex_lock(&data->update_lock);
	if ((nr==6 || nr==7) && (vccp_limit_type[vccp])) {
		vid = LM93_VID_FROM_REG(data->vid[vccp]);
		data->vccp_limits[vccp] = (data->vccp_limits[vccp] & 0x0f) |
				LM93_IN_REL_TO_REG(val, 1, vid);
		lm93_write_byte(client, LM93_REG_VCCP_LIMIT_OFF(vccp),
				data->vccp_limits[vccp]);
	}
	else {
		data->block7[nr].max = LM93_IN_TO_REG(nr,val);
		lm93_write_byte(client, LM93_REG_IN_MAX(nr),
				data->block7[nr].max);
	}
	mutex_unlock(&data->update_lock);
	return count;
}

static SENSOR_DEVICE_ATTR(in1_max, S_IWUSR | S_IRUGO,
			  show_in_max, store_in_max, 0);
static SENSOR_DEVICE_ATTR(in2_max, S_IWUSR | S_IRUGO,
			  show_in_max, store_in_max, 1);
static SENSOR_DEVICE_ATTR(in3_max, S_IWUSR | S_IRUGO,
			  show_in_max, store_in_max, 2);
static SENSOR_DEVICE_ATTR(in4_max, S_IWUSR | S_IRUGO,
			  show_in_max, store_in_max, 3);
static SENSOR_DEVICE_ATTR(in5_max, S_IWUSR | S_IRUGO,
			  show_in_max, store_in_max, 4);
static SENSOR_DEVICE_ATTR(in6_max, S_IWUSR | S_IRUGO,
			  show_in_max, store_in_max, 5);
static SENSOR_DEVICE_ATTR(in7_max, S_IWUSR | S_IRUGO,
			  show_in_max, store_in_max, 6);
static SENSOR_DEVICE_ATTR(in8_max, S_IWUSR | S_IRUGO,
			  show_in_max, store_in_max, 7);
static SENSOR_DEVICE_ATTR(in9_max, S_IWUSR | S_IRUGO,
			  show_in_max, store_in_max, 8);
static SENSOR_DEVICE_ATTR(in10_max, S_IWUSR | S_IRUGO,
			  show_in_max, store_in_max, 9);
static SENSOR_DEVICE_ATTR(in11_max, S_IWUSR | S_IRUGO,
			  show_in_max, store_in_max, 10);
static SENSOR_DEVICE_ATTR(in12_max, S_IWUSR | S_IRUGO,
			  show_in_max, store_in_max, 11);
static SENSOR_DEVICE_ATTR(in13_max, S_IWUSR | S_IRUGO,
			  show_in_max, store_in_max, 12);
static SENSOR_DEVICE_ATTR(in14_max, S_IWUSR | S_IRUGO,
			  show_in_max, store_in_max, 13);
static SENSOR_DEVICE_ATTR(in15_max, S_IWUSR | S_IRUGO,
			  show_in_max, store_in_max, 14);
static SENSOR_DEVICE_ATTR(in16_max, S_IWUSR | S_IRUGO,
			  show_in_max, store_in_max, 15);

static ssize_t show_temp(struct device *dev,
			 struct device_attribute *attr, char *buf)
{
	int nr = (to_sensor_dev_attr(attr))->index;
	struct lm93_data *data = lm93_update_device(dev);
	return sprintf(buf,"%d\n",LM93_TEMP_FROM_REG(data->block2[nr]));
}

static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);

static ssize_t show_temp_min(struct device *dev,
				struct device_attribute *attr, char *buf)
{
	int nr = (to_sensor_dev_attr(attr))->index;
	struct lm93_data *data = lm93_update_device(dev);
	return sprintf(buf,"%d\n",LM93_TEMP_FROM_REG(data->temp_lim[nr].min));
}

static ssize_t store_temp_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 lm93_data *data = i2c_get_clientdata(client);
	long val = simple_strtol(buf, NULL, 10);

	mutex_lock(&data->update_lock);
	data->temp_lim[nr].min = LM93_TEMP_TO_REG(val);
	lm93_write_byte(client, LM93_REG_TEMP_MIN(nr), data->temp_lim[nr].min);
	mutex_unlock(&data->update_lock);
	return count;
}

static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO,
			  show_temp_min, store_temp_min, 0);
static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO,
			  show_temp_min, store_temp_min, 1);
static SENSOR_DEVICE_ATTR(temp3_min, S_IWUSR | S_IRUGO,
			  show_temp_min, store_temp_min, 2);

static ssize_t show_temp_max(struct device *dev,
			     struct device_attribute *attr, char *buf)
{
	int nr = (to_sensor_dev_attr(attr))->index;
	struct lm93_data *data = lm93_update_device(dev);
	return sprintf(buf,"%d\n",LM93_TEMP_FROM_REG(data->temp_lim[nr].max));
}

static ssize_t store_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 lm93_data *data = i2c_get_clientdata(client);
	long val = simple_strtol(buf, NULL, 10);

	mutex_lock(&data->update_lock);
	data->temp_lim[nr].max = LM93_TEMP_TO_REG(val);
	lm93_write_byte(client, LM93_REG_TEMP_MAX(nr), data->temp_lim[nr].max);
	mutex_unlock(&data->update_lock);
	return count;
}

static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO,
			  show_temp_max, store_temp_max, 0);
static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO,
			  show_temp_max, store_temp_max, 1);
static SENSOR_DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO,
			  show_temp_max, store_temp_max, 2);

static ssize_t show_temp_auto_base(struct device *dev,
				struct device_attribute *attr, char *buf)
{
	int nr = (to_sensor_dev_attr(attr))->index;
	struct lm93_data *data = lm93_update_device(dev);
	return sprintf(buf,"%d\n",LM93_TEMP_FROM_REG(data->block10.base[nr]));
}

static ssize_t store_temp_auto_base(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 lm93_data *data = i2c_get_clientdata(client);
	long val = simple_strtol(buf, NULL, 10);

	mutex_lock(&data->update_lock);
	data->block10.base[nr] = LM93_TEMP_TO_REG(val);
	lm93_write_byte(client, LM93_REG_TEMP_BASE(nr), data->block10.base[nr]);
	mutex_unlock(&data->update_lock);
	return count;
}

static SENSOR_DEVICE_ATTR(temp1_auto_base, S_IWUSR | S_IRUGO,
			  show_temp_auto_base, store_temp_auto_base, 0);
static SENSOR_DEVICE_ATTR(temp2_auto_base, S_IWUSR | S_IRUGO,
			  show_temp_auto_base, store_temp_auto_base, 1);
static SENSOR_DEVICE_ATTR(temp3_auto_base, S_IWUSR | S_IRUGO,
			  show_temp_auto_base, store_temp_auto_base, 2);

static ssize_t show_temp_auto_boost(struct device *dev,
				    struct device_attribute *attr,char *buf)
{
	int nr = (to_sensor_dev_attr(attr))->index;
	struct lm93_data *data = lm93_update_device(dev);
	return sprintf(buf,"%d\n",LM93_TEMP_FROM_REG(data->boost[nr]));
}

static ssize_t store_temp_auto_boost(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 lm93_data *data = i2c_get_clientdata(client);
	long val = simple_strtol(buf, NULL, 10);

	mutex_lock(&data->update_lock);
	data->boost[nr] = LM93_TEMP_TO_REG(val);
	lm93_write_byte(client, LM93_REG_BOOST(nr), data->boost[nr]);
	mutex_unlock(&data->update_lock);
	return count;
}

static SENSOR_DEVICE_ATTR(temp1_auto_boost, S_IWUSR | S_IRUGO,
			  show_temp_auto_boost, store_temp_auto_boost, 0);
static SENSOR_DEVICE_ATTR(temp2_auto_boost, S_IWUSR | S_IRUGO,
			  show_temp_auto_boost, store_temp_auto_boost, 1);
static SENSOR_DEVICE_ATTR(temp3_auto_boost, S_IWUSR | S_IRUGO,
			  show_temp_auto_boost, store_temp_auto_boost, 2);

static ssize_t show_temp_auto_boost_hyst(struct device *dev,
					 struct device_attribute *attr,
					 char *buf)
{
	int nr = (to_sensor_dev_attr(attr))->index;
	struct lm93_data *data = lm93_update_device(dev);
	int mode = LM93_TEMP_OFFSET_MODE_FROM_REG(data->sfc2, nr);
	return sprintf(buf,"%d\n",
		       LM93_AUTO_BOOST_HYST_FROM_REGS(data, nr, mode));
}

static ssize_t store_temp_auto_boost_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 lm93_data *data = i2c_get_clientdata(client);
	u32 val = simple_strtoul(buf, NULL, 10);

	mutex_lock(&data->update_lock);
	/* force 0.5C/bit mode */
	data->sfc2 = lm93_read_byte(client, LM93_REG_SFC2);
	data->sfc2 |= ((nr < 2) ? 0x10 : 0x20);
	lm93_write_byte(client, LM93_REG_SFC2, data->sfc2);
	data->boost_hyst[nr/2] = LM93_AUTO_BOOST_HYST_TO_REG(data, val, nr, 1);
	lm93_write_byte(client, LM93_REG_BOOST_HYST(nr),
			data->boost_hyst[nr/2]);
	mutex_unlock(&data->update_lock);
	return count;
}

static SENSOR_DEVICE_ATTR(temp1_auto_boost_hyst, S_IWUSR | S_IRUGO,
			  show_temp_auto_boost_hyst,
			  store_temp_auto_boost_hyst, 0);
static SENSOR_DEVICE_ATTR(temp2_auto_boost_hyst, S_IWUSR | S_IRUGO,
			  show_temp_auto_boost_hyst,
			  store_temp_auto_boost_hyst, 1);
static SENSOR_DEVICE_ATTR(temp3_auto_boost_hyst, S_IWUSR | S_IRUGO,
			  show_temp_auto_boost_hyst,
			  store_temp_auto_boost_hyst, 2);

static ssize_t show_temp_auto_offset(struct device *dev,
				struct device_attribute *attr, char *buf)
{
	struct sensor_device_attribute_2 *s_attr = to_sensor_dev_attr_2(attr);
	int nr = s_attr->index;
	int ofs = s_attr->nr;
	struct lm93_data *data = lm93_update_device(dev);
	int mode = LM93_TEMP_OFFSET_MODE_FROM_REG(data->sfc2, nr);
	return sprintf(buf,"%d\n",
	       LM93_TEMP_AUTO_OFFSET_FROM_REG(data->block10.offset[ofs],
					      nr,mode));
}

static ssize_t store_temp_auto_offset(struct device *dev,
					struct device_attribute *attr,
					const char *buf, size_t count)
{
	struct sensor_device_attribute_2 *s_attr = to_sensor_dev_attr_2(attr);
	int nr = s_attr->index;
	int ofs = s_attr->nr;
	struct i2c_client *client = to_i2c_client(dev);
	struct lm93_data *data = i2c_get_clientdata(client);
	u32 val = simple_strtoul(buf, NULL, 10);

	mutex_lock(&data->update_lock);
	/* force 0.5C/bit mode */
	data->sfc2 = lm93_read_byte(client, LM93_REG_SFC2);
	data->sfc2 |= ((nr < 2) ? 0x10 : 0x20);
	lm93_write_byte(client, LM93_REG_SFC2, data->sfc2);
	data->block10.offset[ofs] = LM93_TEMP_AUTO_OFFSET_TO_REG(
			data->block10.offset[ofs], val, nr, 1);
	lm93_write_byte(client, LM93_REG_TEMP_OFFSET(ofs),
			data->block10.offset[ofs]);
	mutex_unlock(&data->update_lock);
	return count;
}

static SENSOR_DEVICE_ATTR_2(temp1_auto_offset1, S_IWUSR | S_IRUGO,
			  show_temp_auto_offset, store_temp_auto_offset, 0, 0);
static SENSOR_DEVICE_ATTR_2(temp1_auto_offset2, S_IWUSR | S_IRUGO,
			  show_temp_auto_offset, store_temp_auto_offset, 1, 0);
static SENSOR_DEVICE_ATTR_2(temp1_auto_offset3, S_IWUSR | S_IRUGO,
			  show_temp_auto_offset, store_temp_auto_offset, 2, 0);
static SENSOR_DEVICE_ATTR_2(temp1_auto_offset4, S_IWUSR | S_IRUGO,
			  show_temp_auto_offset, store_temp_auto_offset, 3, 0);
static SENSOR_DEVICE_ATTR_2(temp1_auto_offset5, S_IWUSR | S_IRUGO,
			  show_temp_auto_offset, store_temp_auto_offset, 4, 0);
static SENSOR_DEVICE_ATTR_2(temp1_auto_offset6, S_IWUSR | S_IRUGO,
			  show_temp_auto_offset, store_temp_auto_offset, 5, 0);
static SENSOR_DEVICE_ATTR_2(temp1_auto_offset7, S_IWUSR | S_IRUGO,
			  show_temp_auto_offset, store_temp_auto_offset, 6, 0);
static SENSOR_DEVICE_ATTR_2(temp1_auto_offset8, S_IWUSR | S_IRUGO,
			  show_temp_auto_offset, store_temp_auto_offset, 7, 0);
static SENSOR_DEVICE_ATTR_2(temp1_auto_offset9, S_IWUSR | S_IRUGO,
			  show_temp_auto_offset, store_temp_auto_offset, 8, 0);
static SENSOR_DEVICE_ATTR_2(temp1_auto_offset10, S_IWUSR | S_IRUGO,
			  show_temp_auto_offset, store_temp_auto_offset, 9, 0);
static SENSOR_DEVICE_ATTR_2(temp1_auto_offset11, S_IWUSR | S_IRUGO,
			  show_temp_auto_offset, store_temp_auto_offset, 10, 0);
static SENSOR_DEVICE_ATTR_2(temp1_auto_offset12, S_IWUSR | S_IRUGO,
			  show_temp_auto_offset, store_temp_auto_offset, 11, 0);
static SENSOR_DEVICE_ATTR_2(temp2_auto_offset1, S_IWUSR | S_IRUGO,
			  show_temp_auto_offset, store_temp_auto_offset, 0, 1);
static SENSOR_DEVICE_ATTR_2(temp2_auto_offset2, S_IWUSR | S_IRUGO,
			  show_temp_auto_offset, store_temp_auto_offset, 1, 1);
static SENSOR_DEVICE_ATTR_2(temp2_auto_offset3, S_IWUSR | S_IRUGO,
			  show_temp_auto_offset, store_temp_auto_offset, 2, 1);
static SENSOR_DEVICE_ATTR_2(temp2_auto_offset4, S_IWUSR | S_IRUGO,
			  show_temp_auto_offset, store_temp_auto_offset, 3, 1);
static SENSOR_DEVICE_ATTR_2(temp2_auto_offset5, S_IWUSR | S_IRUGO,
			  show_temp_auto_offset, store_temp_auto_offset, 4, 1);
static SENSOR_DEVICE_ATTR_2(temp2_auto_offset6, S_IWUSR | S_IRUGO,
			  show_temp_auto_offset, store_temp_auto_offset, 5, 1);
static SENSOR_DEVICE_ATTR_2(temp2_auto_offset7, S_IWUSR | S_IRUGO,
			  show_temp_auto_offset, store_temp_auto_offset, 6, 1);
static SENSOR_DEVICE_ATTR_2(temp2_auto_offset8, S_IWUSR | S_IRUGO,
			  show_temp_auto_offset, store_temp_auto_offset, 7, 1);
static SENSOR_DEVICE_ATTR_2(temp2_auto_offset9, S_IWUSR | S_IRUGO,
			  show_temp_auto_offset, store_temp_auto_offset, 8, 1);
static SENSOR_DEVICE_ATTR_2(temp2_auto_offset10, S_IWUSR | S_IRUGO,
			  show_temp_auto_offset, store_temp_auto_offset, 9, 1);
static SENSOR_DEVICE_ATTR_2(temp2_auto_offset11, S_IWUSR | S_IRUGO,
			  show_temp_auto_offset, store_temp_auto_offset, 10, 1);
static SENSOR_DEVICE_ATTR_2(temp2_auto_offset12, S_IWUSR | S_IRUGO,
			  show_temp_auto_offset, store_temp_auto_offset, 11, 1);
static SENSOR_DEVICE_ATTR_2(temp3_auto_offset1, S_IWUSR | S_IRUGO,
			  show_temp_auto_offset, store_temp_auto_offset, 0, 2);
static SENSOR_DEVICE_ATTR_2(temp3_auto_offset2, S_IWUSR | S_IRUGO,
			  show_temp_auto_offset, store_temp_auto_offset, 1, 2);
static SENSOR_DEVICE_ATTR_2(temp3_auto_offset3, S_IWUSR | S_IRUGO,
			  show_temp_auto_offset, store_temp_auto_offset, 2, 2);
static SENSOR_DEVICE_ATTR_2(temp3_auto_offset4, S_IWUSR | S_IRUGO,
			  show_temp_auto_offset, store_temp_auto_offset, 3, 2);
static SENSOR_DEVICE_ATTR_2(temp3_auto_offset5, S_IWUSR | S_IRUGO,
			  show_temp_auto_offset, store_temp_auto_offset, 4, 2);
static SENSOR_DEVICE_ATTR_2(temp3_auto_offset6, S_IWUSR | S_IRUGO,
			  show_temp_auto_offset, store_temp_auto_offset, 5, 2);
static SENSOR_DEVICE_ATTR_2(temp3_auto_offset7, S_IWUSR | S_IRUGO,
			  show_temp_auto_offset, store_temp_auto_offset, 6, 2);
static SENSOR_DEVICE_ATTR_2(temp3_auto_offset8, S_IWUSR | S_IRUGO,
			  show_temp_auto_offset, store_temp_auto_offset, 7, 2);
static SENSOR_DEVICE_ATTR_2(temp3_auto_offset9, S_IWUSR | S_IRUGO,
			  show_temp_auto_offset, store_temp_auto_offset, 8, 2);
static SENSOR_DEVICE_ATTR_2(temp3_auto_offset10, S_IWUSR | S_IRUGO,
			  show_temp_auto_offset, store_temp_auto_offset, 9, 2);
static SENSOR_DEVICE_ATTR_2(temp3_auto_offset11, S_IWUSR | S_IRUGO,
			  show_temp_auto_offset, store_temp_auto_offset, 10, 2);
static SENSOR_DEVICE_ATTR_2(temp3_auto_offset12, S_IWUSR | S_IRUGO,
			  show_temp_auto_offset, store_temp_auto_offset, 11, 2);

static ssize_t show_temp_auto_pwm_min(struct device *dev,
				struct device_attribute *attr, char *buf)
{
	int nr = (to_sensor_dev_attr(attr))->index;
	u8 reg, ctl4;
	struct lm93_data *data = lm93_update_device(dev);
	reg = data->auto_pwm_min_hyst[nr/2] >> 4 & 0x0f;
	ctl4 = data->block9[nr][LM93_PWM_CTL4];
	return sprintf(buf,"%d\n",LM93_PWM_FROM_REG(reg, (ctl4 & 0x07) ?
				LM93_PWM_MAP_LO_FREQ : LM93_PWM_MAP_HI_FREQ));
}

static ssize_t store_temp_auto_pwm_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 lm93_data *data = i2c_get_clientdata(client);
	u32 val = simple_strtoul(buf, NULL, 10);
	u8 reg, ctl4;

	mutex_lock(&data->update_lock);
	reg = lm93_read_byte(client, LM93_REG_PWM_MIN_HYST(nr));
	ctl4 = lm93_read_byte(client, LM93_REG_PWM_CTL(nr,LM93_PWM_CTL4));
	reg = (reg & 0x0f) |
		LM93_PWM_TO_REG(val, (ctl4 & 0x07) ?
				LM93_PWM_MAP_LO_FREQ :
				LM93_PWM_MAP_HI_FREQ) << 4;
	data->auto_pwm_min_hyst[nr/2] = reg;
	lm93_write_byte(client, LM93_REG_PWM_MIN_HYST(nr), reg);
	mutex_unlock(&data->update_lock);
	return count;
}

static SENSOR_DEVICE_ATTR(temp1_auto_pwm_min, S_IWUSR | S_IRUGO,
			  show_temp_auto_pwm_min,
			  store_temp_auto_pwm_min, 0);
static SENSOR_DEVICE_ATTR(temp2_auto_pwm_min, S_IWUSR | S_IRUGO,
			  show_temp_auto_pwm_min,
			  store_temp_auto_pwm_min, 1);
static SENSOR_DEVICE_ATTR(temp3_auto_pwm_min, S_IWUSR | S_IRUGO,
			  show_temp_auto_pwm_min,
			  store_temp_auto_pwm_min, 2);

static ssize_t show_temp_auto_offset_hyst(struct device *dev,
				struct device_attribute *attr, char *buf)
{
	int nr = (to_sensor_dev_attr(attr))->index;
	struct lm93_data *data = lm93_update_device(dev);
	int mode = LM93_TEMP_OFFSET_MODE_FROM_REG(data->sfc2, nr);
	return sprintf(buf,"%d\n",LM93_TEMP_OFFSET_FROM_REG(
					data->auto_pwm_min_hyst[nr/2], mode));
}

static ssize_t store_temp_auto_offset_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 lm93_data *data = i2c_get_clientdata(client);
	u32 val = simple_strtoul(buf, NULL, 10);
	u8 reg;

	mutex_lock(&data->update_lock);
	/* force 0.5C/bit mode */
	data->sfc2 = lm93_read_byte(client, LM93_REG_SFC2);
	data->sfc2 |= ((nr < 2) ? 0x10 : 0x20);
	lm93_write_byte(client, LM93_REG_SFC2, data->sfc2);
	reg = data->auto_pwm_min_hyst[nr/2];
	reg = (reg & 0xf0) | (LM93_TE…