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/*

    lm85.c - Part of lm_sensors, Linux kernel modules for hardware

             monitoring

    Copyright (c) 1998, 1999  Frodo Looijaard <frodol@dds.nl>

    Copyright (c) 2002, 2003  Philip Pokorny <ppokorny@penguincomputing.com>

    Copyright (c) 2003        Margit Schubert-While <margitsw@t-online.de>

    Copyright (c) 2004        Justin Thiessen <jthiessen@penguincomputing.com>

    Chip details at           <http://www.national.com/ds/LM/LM85.pdf>

    This program is free software; you can redistribute it and/or modify

    it under the terms of the GNU General Public License as published by

    the Free Software Foundation; either version 2 of the License, or

    (at your option) any later version.

    This program is distributed in the hope that it will be useful,

    but WITHOUT ANY WARRANTY; without even the implied warranty of

    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License

    along with this program; if not, write to the Free Software

    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#include <linux/module.h>

#include <linux/init.h>

#include <linux/slab.h>

#include <linux/jiffies.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, I2C_CLIENT_END };

/* Insmod parameters */

I2C_CLIENT_INSMOD_6(lm85b, lm85c, adm1027, adt7463, emc6d100, emc6d102);

/* The LM85 registers */

#define LM85_REG_IN(nr)                 (0x20 + (nr))

#define LM85_REG_IN_MIN(nr)             (0x44 + (nr) * 2)

#define LM85_REG_IN_MAX(nr)             (0x45 + (nr) * 2)

#define LM85_REG_TEMP(nr)               (0x25 + (nr))

#define LM85_REG_TEMP_MIN(nr)           (0x4e + (nr) * 2)

#define LM85_REG_TEMP_MAX(nr)           (0x4f + (nr) * 2)

/* Fan speeds are LSB, MSB (2 bytes) */

#define LM85_REG_FAN(nr)                (0x28 + (nr) *2)

#define LM85_REG_FAN_MIN(nr)            (0x54 + (nr) *2)

#define LM85_REG_PWM(nr)                (0x30 + (nr))

#define ADT7463_REG_OPPOINT(nr)         (0x33 + (nr))

#define ADT7463_REG_TMIN_CTL1           0x36

#define ADT7463_REG_TMIN_CTL2           0x37

#define LM85_REG_DEVICE                 0x3d

#define LM85_REG_COMPANY                0x3e

#define LM85_REG_VERSTEP                0x3f

/* These are the recognized values for the above regs */

#define LM85_DEVICE_ADX                 0x27

#define LM85_COMPANY_NATIONAL           0x01

#define LM85_COMPANY_ANALOG_DEV         0x41

#define LM85_COMPANY_SMSC               0x5c

#define LM85_VERSTEP_VMASK              0xf0

#define LM85_VERSTEP_GENERIC            0x60

#define LM85_VERSTEP_LM85C              0x60

#define LM85_VERSTEP_LM85B              0x62

#define LM85_VERSTEP_ADM1027            0x60

#define LM85_VERSTEP_ADT7463            0x62

#define LM85_VERSTEP_ADT7463C           0x6A

#define LM85_VERSTEP_EMC6D100_A0        0x60

#define LM85_VERSTEP_EMC6D100_A1        0x61

#define LM85_VERSTEP_EMC6D102           0x65

#define LM85_REG_CONFIG                 0x40

#define LM85_REG_ALARM1                 0x41

#define LM85_REG_ALARM2                 0x42

#define LM85_REG_VID                    0x43

/* Automated FAN control */

#define LM85_REG_AFAN_CONFIG(nr)        (0x5c + (nr))

#define LM85_REG_AFAN_RANGE(nr)         (0x5f + (nr))

#define LM85_REG_AFAN_SPIKE1            0x62

#define LM85_REG_AFAN_SPIKE2            0x63

#define LM85_REG_AFAN_MINPWM(nr)        (0x64 + (nr))

#define LM85_REG_AFAN_LIMIT(nr)         (0x67 + (nr))

#define LM85_REG_AFAN_CRITICAL(nr)      (0x6a + (nr))

#define LM85_REG_AFAN_HYST1             0x6d

#define LM85_REG_AFAN_HYST2             0x6e

#define LM85_REG_TACH_MODE              0x74

#define LM85_REG_SPINUP_CTL             0x75

#define ADM1027_REG_TEMP_OFFSET(nr)     (0x70 + (nr))

#define ADM1027_REG_CONFIG2             0x73

#define ADM1027_REG_INTMASK1            0x74

#define ADM1027_REG_INTMASK2            0x75

#define ADM1027_REG_EXTEND_ADC1         0x76

#define ADM1027_REG_EXTEND_ADC2         0x77

#define ADM1027_REG_CONFIG3             0x78

#define ADM1027_REG_FAN_PPR             0x7b

#define ADT7463_REG_THERM               0x79

#define ADT7463_REG_THERM_LIMIT         0x7A

#define EMC6D100_REG_ALARM3             0x7d

/* IN5, IN6 and IN7 */

#define EMC6D100_REG_IN(nr)             (0x70 + ((nr)-5))

#define EMC6D100_REG_IN_MIN(nr)         (0x73 + ((nr)-5) * 2)

#define EMC6D100_REG_IN_MAX(nr)         (0x74 + ((nr)-5) * 2)

#define EMC6D102_REG_EXTEND_ADC1        0x85

#define EMC6D102_REG_EXTEND_ADC2        0x86

#define EMC6D102_REG_EXTEND_ADC3        0x87

#define EMC6D102_REG_EXTEND_ADC4        0x88

/* Conversions. Rounding and limit checking is only done on the TO_REG

   variants. Note that you should be a bit careful with which arguments

   these macros are called: arguments may be evaluated more than once.

 */

/* IN are scaled acording to built-in resistors */

static int lm85_scaling[] = {  /* .001 Volts */

                2500, 2250, 3300, 5000, 12000,

                3300, 1500, 1800 /*EMC6D100*/

        };

#define SCALE(val,from,to)              (((val)*(to) + ((from)/2))/(from))

#define INS_TO_REG(n,val)       \

                SENSORS_LIMIT(SCALE(val,lm85_scaling[n],192),0,255)

#define INSEXT_FROM_REG(n,val,ext)      \

                SCALE(((val) << 4) + (ext), 192 << 4, lm85_scaling[n])

#define INS_FROM_REG(n,val)     SCALE((val), 192, lm85_scaling[n])

/* FAN speed is measured using 90kHz clock */

static inline u16 FAN_TO_REG(unsigned long val)

{

        if (!val)

                return 0xffff;

        return SENSORS_LIMIT(5400000 / val, 1, 0xfffe);

}

#define FAN_FROM_REG(val)       ((val)==0?-1:(val)==0xffff?0:5400000/(val))

/* Temperature is reported in .001 degC increments */

#define TEMP_TO_REG(val)        \

                SENSORS_LIMIT(SCALE(val,1000,1),-127,127)

#define TEMPEXT_FROM_REG(val,ext)       \

                SCALE(((val) << 4) + (ext), 16, 1000)

#define TEMP_FROM_REG(val)      ((val) * 1000)

#define PWM_TO_REG(val)                 (SENSORS_LIMIT(val,0,255))

#define PWM_FROM_REG(val)               (val)

/* ZONEs have the following parameters:

 *    Limit (low) temp,           1. degC

 *    Hysteresis (below limit),   1. degC (0-15)

 *    Range of speed control,     .1 degC (2-80)

 *    Critical (high) temp,       1. degC

 *

 * FAN PWMs have the following parameters:

 *    Reference Zone,                 1, 2, 3, etc.

 *    Spinup time,                    .05 sec

 *    PWM value at limit/low temp,    1 count

 *    PWM Frequency,                  1. Hz

 *    PWM is Min or OFF below limit,  flag

 *    Invert PWM output,              flag

 *

 * Some chips filter the temp, others the fan.

 *    Filter constant (or disabled)   .1 seconds

 */

/* These are the zone temperature range encodings in .001 degree C */

static int lm85_range_map[] = {

                2000,  2500,  3300,  4000,  5000,  6600,

                8000, 10000, 13300, 16000, 20000, 26600,

                32000, 40000, 53300, 80000

        };

static int RANGE_TO_REG( int range )

{

        int i;

        if ( range < lm85_range_map[0] ) {

                return 0 ;

        } else if ( range > lm85_range_map[15] ) {

                return 15 ;

        } else {  /* find closest match */

                for ( i = 14 ; i >= 0 ; --i ) {

                        if ( range > lm85_range_map[i] ) { /* range bracketed */

                                if ((lm85_range_map[i+1] - range) <

                                        (range - lm85_range_map[i])) {

                                        i++;

                                        break;

                                }

                                break;

                        }

                }

        }

        return( i & 0x0f );

}

#define RANGE_FROM_REG(val) (lm85_range_map[(val)&0x0f])

/* These are the Acoustic Enhancement, or Temperature smoothing encodings

 * NOTE: The enable/disable bit is INCLUDED in these encodings as the

 *       MSB (bit 3, value 8).  If the enable bit is 0, the encoded value

 *       is ignored, or set to 0.

 */

/* These are the PWM frequency encodings */

static int lm85_freq_map[] = { /* .1 Hz */

                100, 150, 230, 300, 380, 470, 620, 940

        };

static int FREQ_TO_REG( int freq )

{

        int i;

        if( freq >= lm85_freq_map[7] ) { return 7 ; }

        for( i = 0 ; i < 7 ; ++i )

                if( freq <= lm85_freq_map[i] )

                        break ;

        return( i & 0x07 );

}

#define FREQ_FROM_REG(val) (lm85_freq_map[(val)&0x07])

/* Since we can't use strings, I'm abusing these numbers

 *   to stand in for the following meanings:

 *      1 -- PWM responds to Zone 1

 *      2 -- PWM responds to Zone 2

 *      3 -- PWM responds to Zone 3

 *     23 -- PWM responds to the higher temp of Zone 2 or 3

 *    123 -- PWM responds to highest of Zone 1, 2, or 3

 *      0 -- PWM is always at 0% (ie, off)

 *     -1 -- PWM is always at 100%

 *     -2 -- PWM responds to manual control

 */

static int lm85_zone_map[] = { 1, 2, 3, -1, 0, 23, 123, -2 };

#define ZONE_FROM_REG(val) (lm85_zone_map[((val)>>5)&0x07])

static int ZONE_TO_REG( int zone )

{

        int i;

        for( i = 0 ; i <= 7 ; ++i )

                if( zone == lm85_zone_map[i] )

                        break ;

        if( i > 7 )   /* Not found. */

                i = 3;  /* Always 100% */

        return( (i & 0x07)<<5 );

}

#define HYST_TO_REG(val) (SENSORS_LIMIT(((val)+500)/1000,0,15))

#define HYST_FROM_REG(val) ((val)*1000)

#define OFFSET_TO_REG(val) (SENSORS_LIMIT((val)/25,-127,127))

#define OFFSET_FROM_REG(val) ((val)*25)

#define PPR_MASK(fan) (0x03<<(fan *2))

#define PPR_TO_REG(val,fan) (SENSORS_LIMIT((val)-1,0,3)<<(fan *2))

#define PPR_FROM_REG(val,fan) ((((val)>>(fan * 2))&0x03)+1)

/* Chip sampling rates

 *

 * Some sensors are not updated more frequently than once per second

 *    so it doesn't make sense to read them more often than that.

 *    We cache the results and return the saved data if the driver

 *    is called again before a second has elapsed.

 *

 * Also, there is significant configuration data for this chip

 *    given the automatic PWM fan control that is possible.  There

 *    are about 47 bytes of config data to only 22 bytes of actual

 *    readings.  So, we keep the config data up to date in the cache

 *    when it is written and only sample it once every 1 *minute*

 */

#define LM85_DATA_INTERVAL  (HZ + HZ / 2)

#define LM85_CONFIG_INTERVAL  (1 * 60 * HZ)

/* LM85 can automatically adjust fan speeds based on temperature

 * This structure encapsulates an entire Zone config.  There are

 * three zones (one for each temperature input) on the lm85

 */

struct lm85_zone {

        s8 limit;       /* Low temp limit */

        u8 hyst;        /* Low limit hysteresis. (0-15) */

        u8 range;       /* Temp range, encoded */

        s8 critical;    /* "All fans ON" temp limit */

        u8 off_desired; /* Actual "off" temperature specified.  Preserved

                         * to prevent "drift" as other autofan control

                         * values change.

                         */

        u8 max_desired; /* Actual "max" temperature specified.  Preserved

                         * to prevent "drift" as other autofan control

                         * values change.

                         */

};

struct lm85_autofan {

        u8 config;      /* Register value */

        u8 freq;        /* PWM frequency, encoded */

        u8 min_pwm;     /* Minimum PWM value, encoded */

        u8 min_off;     /* Min PWM or OFF below "limit", flag */

};

/* For each registered chip, we need to keep some data in memory.

   The structure is dynamically allocated. */

struct lm85_data {

        struct i2c_client client;

        struct device *hwmon_dev;

        enum chips type;

        struct mutex update_lock;

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

        unsigned long last_reading;     /* In jiffies */

        unsigned long last_config;      /* In jiffies */

        u8 in[8];               /* Register value */

        u8 in_max[8];           /* Register value */

        u8 in_min[8];           /* Register value */

        s8 temp[3];             /* Register value */

        s8 temp_min[3];         /* Register value */

        s8 temp_max[3];         /* Register value */

        s8 temp_offset[3];      /* Register value */

        u16 fan[4];             /* Register value */

        u16 fan_min[4];         /* Register value */

        u8 pwm[3];              /* Register value */

        u8 spinup_ctl;          /* Register encoding, combined */

        u8 tach_mode;           /* Register encoding, combined */

        u8 temp_ext[3];         /* Decoded values */

        u8 in_ext[8];           /* Decoded values */

        u8 fan_ppr;             /* Register value */

        u8 smooth[3];           /* Register encoding */

        u8 vid;                 /* Register value */

        u8 vrm;                 /* VRM version */

        u8 syncpwm3;            /* Saved PWM3 for TACH 2,3,4 config */

        u8 oppoint[3];          /* Register value */

        u16 tmin_ctl;           /* Register value */

        unsigned long therm_total; /* Cummulative therm count */

        u8 therm_limit;         /* Register value */

        u32 alarms;             /* Register encoding, combined */

        struct lm85_autofan autofan[3];

        struct lm85_zone zone[3];

};

static int lm85_attach_adapter(struct i2c_adapter *adapter);

static int lm85_detect(struct i2c_adapter *adapter, int address,

                        int kind);

static int lm85_detach_client(struct i2c_client *client);

static int lm85_read_value(struct i2c_client *client, u8 reg);

static int lm85_write_value(struct i2c_client *client, u8 reg, int value);

static struct lm85_data *lm85_update_device(struct device *dev);

static void lm85_init_client(struct i2c_client *client);

static struct i2c_driver lm85_driver = {

        .driver = {

                .name   = "lm85",

        },

        .id             = I2C_DRIVERID_LM85,

        .attach_adapter = lm85_attach_adapter,

        .detach_client  = lm85_detach_client,

};

/* 4 Fans */

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

                char *buf)

{

        int nr = to_sensor_dev_attr(attr)->index;

        struct lm85_data *data = lm85_update_device(dev);

        return sprintf(buf,"%d\n", FAN_FROM_REG(data->fan[nr]) );

}

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

                char *buf)

{

        int nr = to_sensor_dev_attr(attr)->index;

        struct lm85_data *data = lm85_update_device(dev);

        return sprintf(buf,"%d\n", FAN_FROM_REG(data->fan_min[nr]) );

}

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

                const char *buf, size_t count)

{

        int nr = to_sensor_dev_attr(attr)->index;

        struct i2c_client *client = to_i2c_client(dev);

        struct lm85_data *data = i2c_get_clientdata(client);

        unsigned long val = simple_strtoul(buf, NULL, 10);

        mutex_lock(&data->update_lock);

        data->fan_min[nr] = FAN_TO_REG(val);

        lm85_write_value(client, LM85_REG_FAN_MIN(nr), data->fan_min[nr]);

        mutex_unlock(&data->update_lock);

        return count;

}

#define show_fan_offset(offset)                                         \

static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO,                 \

                show_fan, NULL, offset - 1);                            \

static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR,         \

                show_fan_min, set_fan_min, offset - 1)

show_fan_offset(1);

show_fan_offset(2);

show_fan_offset(3);

show_fan_offset(4);

/* vid, vrm, alarms */

static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr, char *buf)

{

        struct lm85_data *data = lm85_update_device(dev);

        int vid;

        if (data->type == adt7463 && (data->vid & 0x80)) {

                /* 6-pin VID (VRM 10) */

                vid = vid_from_reg(data->vid & 0x3f, data->vrm);

        } else {

                /* 5-pin VID (VRM 9) */

                vid = vid_from_reg(data->vid & 0x1f, data->vrm);

        }

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

}

static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);

static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr, char *buf)

{

        struct lm85_data *data = dev_get_drvdata(dev);

        return sprintf(buf, "%ld\n", (long) data->vrm);

}

static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)

{

        struct i2c_client *client = to_i2c_client(dev);

        struct lm85_data *data = i2c_get_clientdata(client);

        u32 val;

        val = simple_strtoul(buf, NULL, 10);

        data->vrm = val;

        return count;

}

static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);

static ssize_t show_alarms_reg(struct device *dev, struct device_attribute *attr, char *buf)

{

        struct lm85_data *data = lm85_update_device(dev);

        return sprintf(buf, "%u\n", data->alarms);

}

static DEVICE_ATTR(alarms, S_IRUGO, show_alarms_reg, NULL);

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

                char *buf)

{

        int nr = to_sensor_dev_attr(attr)->index;

        struct lm85_data *data = lm85_update_device(dev);

        return sprintf(buf, "%u\n", (data->alarms >> nr) & 1);

}

static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);

static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);

static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);

static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);

static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);

static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 18);

static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 16);

static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 17);

static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);

static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_alarm, NULL, 14);

static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5);

static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 6);

static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 15);

static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 10);

static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 11);

static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 12);

static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 13);

/* pwm */

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

                char *buf)

{

        int nr = to_sensor_dev_attr(attr)->index;

        struct lm85_data *data = lm85_update_device(dev);

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

}

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

                const char *buf, size_t count)

{

        int nr = to_sensor_dev_attr(attr)->index;

        struct i2c_client *client = to_i2c_client(dev);

        struct lm85_data *data = i2c_get_clientdata(client);

        long val = simple_strtol(buf, NULL, 10);

        mutex_lock(&data->update_lock);

        data->pwm[nr] = PWM_TO_REG(val);

        lm85_write_value(client, LM85_REG_PWM(nr), data->pwm[nr]);

        mutex_unlock(&data->update_lock);

        return count;

}

static ssize_t show_pwm_enable(struct device *dev, struct device_attribute

                *attr, char *buf)

{

        int nr = to_sensor_dev_attr(attr)->index;

        struct lm85_data *data = lm85_update_device(dev);

        int     pwm_zone;

        pwm_zone = ZONE_FROM_REG(data->autofan[nr].config);

        return sprintf(buf,"%d\n", (pwm_zone != 0 && pwm_zone != -1) );

}

#define show_pwm_reg(offset)                                            \

static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR,               \

                show_pwm, set_pwm, offset - 1);                         \

static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO,                \

                show_pwm_enable, NULL, offset - 1)

show_pwm_reg(1);

show_pwm_reg(2);

show_pwm_reg(3);

/* Voltages */

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

                char *buf)

{

        int nr = to_sensor_dev_attr(attr)->index;

        struct lm85_data *data = lm85_update_device(dev);

        return sprintf( buf, "%d\n", INSEXT_FROM_REG(nr,

                                                     data->in[nr],

                                                     data->in_ext[nr]));

}

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

                char *buf)

{

        int nr = to_sensor_dev_attr(attr)->index;

        struct lm85_data *data = lm85_update_device(dev);

        return sprintf(buf,"%d\n", INS_FROM_REG(nr, data->in_min[nr]) );

}

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

                const char *buf, size_t count)

{

        int nr = to_sensor_dev_attr(attr)->index;

        struct i2c_client *client = to_i2c_client(dev);

        struct lm85_data *data = i2c_get_clientdata(client);

        long val = simple_strtol(buf, NULL, 10);

        mutex_lock(&data->update_lock);

        data->in_min[nr] = INS_TO_REG(nr, val);

        lm85_write_value(client, LM85_REG_IN_MIN(nr), data->in_min[nr]);

        mutex_unlock(&data->update_lock);

        return count;

}

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

                char *buf)

{

        int nr = to_sensor_dev_attr(attr)->index;

        struct lm85_data *data = lm85_update_device(dev);

        return sprintf(buf,"%d\n", INS_FROM_REG(nr, data->in_max[nr]) );

}

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

                const char *buf, size_t count)

{

        int nr = to_sensor_dev_attr(attr)->index;

        struct i2c_client *client = to_i2c_client(dev);

        struct lm85_data *data = i2c_get_clientdata(client);

        long val = simple_strtol(buf, NULL, 10);

        mutex_lock(&data->update_lock);

        data->in_max[nr] = INS_TO_REG(nr, val);

        lm85_write_value(client, LM85_REG_IN_MAX(nr), data->in_max[nr]);

        mutex_unlock(&data->update_lock);

        return count;

}

#define show_in_reg(offset)                                             \

static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO,                  \

                show_in, NULL, offset);                                 \

static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR,          \

                show_in_min, set_in_min, offset);                       \

static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR,          \

                show_in_max, set_in_max, offset)

show_in_reg(0);

show_in_reg(1);

show_in_reg(2);

show_in_reg(3);

show_in_reg(4);

show_in_reg(5);

show_in_reg(6);

show_in_reg(7);

/* Temps */

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

                char *buf)

{

        int nr = to_sensor_dev_attr(attr)->index;

        struct lm85_data *data = lm85_update_device(dev);

        return sprintf(buf,"%d\n", TEMPEXT_FROM_REG(data->temp[nr],

                                                    data->temp_ext[nr]));

}

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

                char *buf)

{

        int nr = to_sensor_dev_attr(attr)->index;

        struct lm85_data *data = lm85_update_device(dev);

        return sprintf(buf,"%d\n", TEMP_FROM_REG(data->temp_min[nr]) );

}

static ssize_t set_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 lm85_data *data = i2c_get_clientdata(client);

        long val = simple_strtol(buf, NULL, 10);

        mutex_lock(&data->update_lock);

        data->temp_min[nr] = TEMP_TO_REG(val);

        lm85_write_value(client, LM85_REG_TEMP_MIN(nr), data->temp_min[nr]);

        mutex_unlock(&data->update_lock);

        return count;

}

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

                char *buf)

{

        int nr = to_sensor_dev_attr(attr)->index;

        struct lm85_data *data = lm85_update_device(dev);