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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>

    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/i2c.h>

#include <linux/i2c-sensor.h>

#include <linux/i2c-vid.h>

/*

#include <asm/io.h>

*/

#undef  LM85EXTENDEDFUNC        /* Extended functionality */

/* Addresses to scan */

static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };

static unsigned short normal_i2c_range[] = { I2C_CLIENT_END };

static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END };

static unsigned int normal_isa_range[] = { I2C_CLIENT_ISA_END };

/* Insmod parameters */

SENSORS_INSMOD_4(lm85b, lm85c, adm1027, adt7463);

/* Enable debug if true */

static int      lm85debug = 0;

/* 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_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_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 LM85_ALARM_IN0                  0x0001

#define LM85_ALARM_IN1                  0x0002

#define LM85_ALARM_IN2                  0x0004

#define LM85_ALARM_IN3                  0x0008

#define LM85_ALARM_TEMP1                0x0010

#define LM85_ALARM_TEMP2                0x0020

#define LM85_ALARM_TEMP3                0x0040

#define LM85_ALARM_ALARM2               0x0080

#define LM85_ALARM_IN4                  0x0100

#define LM85_ALARM_RESERVED             0x0200

#define LM85_ALARM_FAN1                 0x0400

#define LM85_ALARM_FAN2                 0x0800

#define LM85_ALARM_FAN3                 0x1000

#define LM85_ALARM_FAN4                 0x2000

#define LM85_ALARM_TEMP1_FAULT          0x4000

#define LM85_ALARM_TEMP3_FAULT          0x8000

/* 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 1.000 == 0xc0, mag = 3 */

#define IN_TO_REG(val)          (SENSORS_LIMIT((((val)*0xc0+500)/1000),0,255))

#define INEXT_FROM_REG(val,ext) (((val)*1000 + (ext)*250 + 96)/0xc0)

#define IN_FROM_REG(val)        (INEXT_FROM_REG(val,0))

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

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

                2500, 2250, 3300, 5000, 12000

        };

#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)             (INSEXT_FROM_REG(n,val,0))

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

#define FAN_TO_REG(val)         (SENSORS_LIMIT( (val)<=0?0: 5400000/(val),0,65534))

#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(((val)+500)/1000,-127,127))

#define TEMPEXT_FROM_REG(val,ext)       ((val)*1000 + (ext)*250)

#define TEMP_FROM_REG(val)              (TEMPEXT_FROM_REG(val,0))

#define EXTTEMP_TO_REG(val)             (SENSORS_LIMIT((val)/250,-127,127))

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

#define PWM_FROM_REG(val)               (val)

#define EXT_FROM_REG(val,sensor)        (((val)>>(sensor * 2))&0x03)

#ifdef  LM85EXTENDEDFUNC        /* Extended functionality */

/* 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 */

static int lm85_range_map[] = {   /* .1 degC */

                 20,  25,  33,  40,  50,  66,

                 80, 100, 133, 160, 200, 266,

                320, 400, 533, 800

        };

static int RANGE_TO_REG( int range )

{

        int i;

        if( range >= lm85_range_map[15] ) { return 15 ; }

        for( i = 0 ; i < 15 ; ++i )

                if( range <= lm85_range_map[i] )

                        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.

 */

static int lm85_smooth_map[] = {  /* .1 sec */

                350, 176, 118,  70,  44,   30,   16,    8

/*    35.4 *    1/1, 1/2, 1/3, 1/5, 1/8, 1/12, 1/24, 1/48  */

        };

static int SMOOTH_TO_REG( int smooth )

{

        int i;

        if( smooth <= 0 ) { return 0 ; }  /* Disabled */

        for( i = 0 ; i < 7 ; ++i )

                if( smooth >= lm85_smooth_map[i] )

                        break ;

        return( (i & 0x07) | 0x08 );

}

#define SMOOTH_FROM_REG(val) ((val)&0x08?lm85_smooth_map[(val)&0x07]:0)

/* These are the fan spinup delay time encodings */

static int lm85_spinup_map[] = {  /* .1 sec */

                0, 1, 2, 4, 7, 10, 20, 40

        };

static int SPINUP_TO_REG( int spinup )

{

        int i;

        if( spinup >= lm85_spinup_map[7] ) { return 7 ; }

        for( i = 0 ; i < 7 ; ++i )

                if( spinup <= lm85_spinup_map[i] )

                        break ;

        return( i & 0x07 );

}

#define SPINUP_FROM_REG(val) (lm85_spinup_map[(val)&0x07])

/* These are the PWM frequency encodings */

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

                100, 150, 230, 300, 380, 470, 620, 980

        };

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

 */

#endif          /* Extended functionality */

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

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

#ifdef  LM85EXTENDEDFUNC        /* Extended functionality */

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 );

}

#endif          /* Extended functionality */

#define HYST_TO_REG(val) (SENSORS_LIMIT((-(val)+5)/10,0,15))

#define HYST_FROM_REG(val) (-(val)*10)

#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)

/* i2c-vid.h defines vid_from_reg() */

#define VID_FROM_REG(val,vrm) (vid_from_reg((val),(vrm)))

#define ALARMS_FROM_REG(val) (val)

/* Unlike some other drivers we DO NOT set initial limits.  Use

 * the config file to set limits.  Some users have reported

 * motherboards shutting down when we set limits in a previous

 * version of the driver.

 */

/* Typically used with Pentium 4 systems v9.1 VRM spec */

#define LM85_INIT_VRM  91

/* 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)

/* For each registered LM85, we need to keep some data in memory. That

   data is pointed to by lm85_list[NR]->data. The structure itself is

   dynamically allocated, at the same time when a new lm85 client is

   allocated. */

/* 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 */

};

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 */

};

struct lm85_data {

        struct semaphore lock;

        enum chips type;

        struct semaphore update_lock;

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

        unsigned long last_reading;     /* In jiffies */

        unsigned long last_config;      /* In jiffies */

        u8 in[5];               /* Register value */

        u8 in_max[5];           /* Register value */

        u8 in_min[5];           /* 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 */

        u16 extend_adc;         /* Register value */

        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 */

        u32 therm_total;        /* Cummulative therm count */

        u8 therm_limit;         /* Register value */

        u16 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 register);

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

static void lm85_update_client(struct i2c_client *client);

static void lm85_init_client(struct i2c_client *client);

static struct i2c_driver lm85_driver = {

        .owner          = THIS_MODULE,

        .name           = "lm85",

        .id             = I2C_DRIVERID_LM85,

        .flags          = I2C_DF_NOTIFY,

        .attach_adapter = lm85_attach_adapter,

        .detach_client  = lm85_detach_client,

};

/* Unique ID assigned to each LM85 detected */

static int lm85_id = 0;

/* 4 Fans */

static ssize_t show_fan(struct device *dev, char *buf, int nr)

{

        struct i2c_client *client = to_i2c_client(dev);

        struct lm85_data *data = i2c_get_clientdata(client);

        lm85_update_client(client);

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

}

static ssize_t show_fan_min(struct device *dev, char *buf, int nr)

{

        struct i2c_client *client = to_i2c_client(dev);

        struct lm85_data *data = i2c_get_clientdata(client);

        lm85_update_client(client);

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

}

static ssize_t set_fan_min(struct device *dev, const char *buf,

                size_t count, int nr)

{

        struct i2c_client *client = to_i2c_client(dev);

        struct lm85_data *data = i2c_get_clientdata(client);

        int     val;

        down(&data->update_lock);

        val = simple_strtol(buf, NULL, 10);

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

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

        up(&data->update_lock);

        return count;

}

#define show_fan_offset(offset)                                         \

static ssize_t show_fan_##offset (struct device *dev, char *buf)        \

{                                                                       \

        return show_fan(dev, buf, 0x##offset - 1);                      \

}                                                                       \

static ssize_t show_fan_##offset##_min (struct device *dev, char *buf)  \

{                                                                       \

        return show_fan_min(dev, buf, 0x##offset - 1);                  \

}                                                                       \

static ssize_t set_fan_##offset##_min (struct device *dev,              \

        const char *buf, size_t count)                                  \

{                                                                       \

        return set_fan_min(dev, buf, count, 0x##offset - 1);            \

}                                                                       \

static DEVICE_ATTR(fan_input##offset, S_IRUGO, show_fan_##offset, NULL) \

static DEVICE_ATTR(fan_min##offset, S_IRUGO | S_IWUSR,                  \

                show_fan_##offset##_min, set_fan_##offset##_min)

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, char *buf)

{

        struct i2c_client *client = to_i2c_client(dev);

        struct lm85_data *data = i2c_get_clientdata(client);

        lm85_update_client(client);

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

}

static DEVICE_ATTR(vid, S_IRUGO, show_vid_reg, NULL)

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

{

        struct i2c_client *client = to_i2c_client(dev);

        struct lm85_data *data = i2c_get_clientdata(client);

        lm85_update_client(client);

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

}

static ssize_t store_vrm_reg(struct device *dev, 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, char *buf)

{

        struct i2c_client *client = to_i2c_client(dev);

        struct lm85_data *data = i2c_get_clientdata(client);

        lm85_update_client(client);

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

}

static DEVICE_ATTR(alarms, S_IRUGO, show_alarms_reg, NULL)

/* pwm */

static ssize_t show_pwm(struct device *dev, char *buf, int nr)

{

        struct i2c_client *client = to_i2c_client(dev);

        struct lm85_data *data = i2c_get_clientdata(client);

        lm85_update_client(client);

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

}

static ssize_t set_pwm(struct device *dev, const char *buf,

                size_t count, int nr)

{

        struct i2c_client *client = to_i2c_client(dev);

        struct lm85_data *data = i2c_get_clientdata(client);

        int     val;

        down(&data->update_lock);

        val = simple_strtol(buf, NULL, 10);

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

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

        up(&data->update_lock);

        return count;

}

static ssize_t show_pwm_enable(struct device *dev, char *buf, int nr)

{

        struct i2c_client *client = to_i2c_client(dev);

        struct lm85_data *data = i2c_get_clientdata(client);

        int     pwm_zone;

        lm85_update_client(client);

        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 ssize_t show_pwm_##offset (struct device *dev, char *buf)        \

{                                                                       \

        return show_pwm(dev, buf, 0x##offset - 1);                      \

}                                                                       \

static ssize_t set_pwm_##offset (struct device *dev,                    \

                                 const char *buf, size_t count)         \

{                                                                       \

        return set_pwm(dev, buf, count, 0x##offset - 1);                \

}                                                                       \

static ssize_t show_pwm_enable##offset (struct device *dev, char *buf)  \

{                                                                       \

        return show_pwm_enable(dev, buf, 0x##offset - 1);                       \

}                                                                       \

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

                show_pwm_##offset, set_pwm_##offset)                    \

static DEVICE_ATTR(pwm_enable##offset, S_IRUGO, show_pwm_enable##offset, NULL)

show_pwm_reg(1);

show_pwm_reg(2);

show_pwm_reg(3);

/* Voltages */

static ssize_t show_in(struct device *dev, char *buf, int nr)

{

        struct i2c_client *client = to_i2c_client(dev);

        struct lm85_data *data = i2c_get_clientdata(client);

        lm85_update_client(client);

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

}

static ssize_t show_in_min(struct device *dev, char *buf, int nr)

{

        struct i2c_client *client = to_i2c_client(dev);

        struct lm85_data *data = i2c_get_clientdata(client);

        lm85_update_client(client);

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

}

static ssize_t set_in_min(struct device *dev, const char *buf,

                size_t count, int nr)

{

        struct i2c_client *client = to_i2c_client(dev);

        struct lm85_data *data = i2c_get_clientdata(client);

        int     val;

        down(&data->update_lock);

        val = simple_strtol(buf, NULL, 10);

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

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

        up(&data->update_lock);

        return count;

}

static ssize_t show_in_max(struct device *dev, char *buf, int nr)

{

        struct i2c_client *client = to_i2c_client(dev);

        struct lm85_data *data = i2c_get_clientdata(client);

        lm85_update_client(client);

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

}

static ssize_t set_in_max(struct device *dev, const char *buf,

                size_t count, int nr)

{

        struct i2c_client *client = to_i2c_client(dev);

        struct lm85_data *data = i2c_get_clientdata(client);

        int     val;

        down(&data->update_lock);

        val = simple_strtol(buf, NULL, 10);

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

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

        up(&data->update_lock);

        return count;

}

#define show_in_reg(offset)                                             \

static ssize_t show_in_##offset (struct device *dev, char *buf)         \

{                                                                       \

        return show_in(dev, buf, 0x##offset);                           \

}                                                                       \

static ssize_t show_in_##offset##_min (struct device *dev, char *buf)   \

{                                                                       \

        return show_in_min(dev, buf, 0x##offset);                       \

}                                                                       \

static ssize_t show_in_##offset##_max (struct device *dev, char *buf)   \

{                                                                       \

        return show_in_max(dev, buf, 0x##offset);                       \

}                                                                       \

static ssize_t set_in_##offset##_min (struct device *dev,               \

        const char *buf, size_t count)                                  \

{                                                                       \

        return set_in_min(dev, buf, count, 0x##offset);                 \

}                                                                       \

static ssize_t set_in_##offset##_max (struct device *dev,               \

        const char *buf, size_t count)                                  \

{                                                                       \

        return set_in_max(dev, buf, count, 0x##offset);                 \

}                                                                       \

static DEVICE_ATTR(in_input##offset, S_IRUGO, show_in_##offset, NULL)   \

static DEVICE_ATTR(in_min##offset, S_IRUGO | S_IWUSR,                   \

                show_in_##offset##_min, set_in_##offset##_min)          \

static DEVICE_ATTR(in_max##offset, S_IRUGO | S_IWUSR,                   \

                show_in_##offset##_max, set_in_##offset##_max)

show_in_reg(0);

show_in_reg(1);

show_in_reg(2);

show_in_reg(3);

show_in_reg(4);

/* Temps */

static ssize_t show_temp(struct device *dev, char *buf, int nr)

{

        struct i2c_client *client = to_i2c_client(dev);

        struct lm85_data *data = i2c_get_clientdata(client);

        lm85_update_client(client);

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

}

static ssize_t show_temp_min(struct device *dev, char *buf, int nr)

{

        struct i2c_client *client = to_i2c_client(dev);

        struct lm85_data *data = i2c_get_clientdata(client);

        lm85_update_client(client);

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

}

static ssize_t set_temp_min(struct device *dev, const char *buf,

                size_t count, int nr)

{

        struct i2c_client *client = to_i2c_client(dev);

        struct lm85_data *data = i2c_get_clientdata(client);

        int     val;

        down(&data->update_lock);

        val = simple_strtol(buf, NULL, 10);

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

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

        up(&data->update_lock);

        return count;

}

static ssize_t show_temp_max(struct device *dev, char *buf, int nr)

{

        struct i2c_client *client = to_i2c_client(dev);

        struct lm85_data *data = i2c_get_clientdata(client);

        lm85_update_client(client);

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

}

static ssize_t set_temp_max(struct device *dev, const char *buf,

                size_t count, int nr)

{

        struct i2c_client *client = to_i2c_client(dev);

        struct lm85_data *data = i2c_get_clientdata(client);

        int     val;

        down(&data->update_lock);

        val = simple_strtol(buf, NULL, 10);

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

        lm85_write_value(client, LM85_REG_TEMP_MAX(nr), data->temp_max[nr]);

        up(&data->update_lock);

        return count;

}

#define show_temp_reg(offset)                                           \

static ssize_t show_temp_##offset (struct device *dev, char *buf)       \

{                                                                       \

        return show_temp(dev, buf, 0x##offset - 1);                     \

}                                                                       \

static ssize_t show_temp_##offset##_min (struct device *dev, char *buf) \

{                                                                       \

        return show_temp_min(dev, buf, 0x##offset - 1);                 \

}                                                                       \

static ssize_t show_temp_##offset##_max (struct device *dev, char *buf) \

{                                                                       \

        return show_temp_max(dev, buf, 0x##offset - 1);                 \

}                                                                       \

static ssize_t set_temp_##offset##_min (struct device *dev,             \

        const char *buf, size_t count)                                  \

{                                                                       \

        return set_temp_min(dev, buf, count, 0x##offset - 1);           \

}                                                                       \

static ssize_t set_temp_##offset##_max (struct device *dev,             \

        const char *buf, size_t count)                                  \

{                                                                       \

        return set_temp_max(dev, buf, count, 0x##offset - 1);           \

}                                                                       \

static DEVICE_ATTR(temp_input##offset, S_IRUGO, show_temp_##offset, NULL)       \

static DEVICE_ATTR(temp_min##offset, S_IRUGO | S_IWUSR,                 \

                show_temp_##offset##_min, set_temp_##offset##_min)      \

static DEVICE_ATTR(temp_max##offset, S_IRUGO | S_IWUSR,                 \

                show_temp_##offset##_max, set_temp_##offset##_max)

show_temp_reg(1);

show_temp_reg(2);

show_temp_reg(3);

int lm85_attach_adapter(struct i2c_adapter *adapter)

{

        return i2c_detect(adapter, &addr_data, lm85_detect);

}

int lm85_detect(struct i2c_adapter *adapter, int address,

                int kind)

{

        int company, verstep ;

        struct i2c_client *new_client = NULL;

        struct lm85_data *data;

        int err = 0;

        const char *type_name = "";

        if (i2c_is_isa_adapter(adapter)) {

                /* This chip has no ISA interface */

                goto ERROR0 ;

        };

        if (!i2c_check_functionality(adapter,

                                        I2C_FUNC_SMBUS_BYTE_DATA)) {

                /* We need to be able to do byte I/O */

                goto ERROR0 ;

        };

        /* 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 lm85_{read,write}_value. */

        if (!(new_client = kmalloc((sizeof(struct i2c_client)) +

                                    sizeof(struct lm85_data),

                                    GFP_KERNEL))) {

                err = -ENOMEM;

                goto ERROR0;

        }

        memset(new_client, 0, sizeof(struct i2c_client) +

                              sizeof(struct lm85_data));

        data = (struct lm85_data *) (new_client + 1);

        i2c_set_clientdata(new_client, data);

        new_client->addr = address;

        new_client->adapter = adapter;

        new_client->driver = &lm85_driver;

        new_client->flags = 0;

        /* Now, we do the remaining detection. */

        company = lm85_read_value(new_client, LM85_REG_COMPANY);

        verstep = lm85_read_value(new_client, LM85_REG_VERSTEP);

        if (lm85debug) {

                printk("lm85: Detecting device at %d,0x%02x with"

                " COMPANY: 0x%02x and VERSTEP: 0x%02x\n",

                i2c_adapter_id(new_client->adapter), new_client->addr,

                company, verstep);

        }

        /* If auto-detecting, Determine the chip type. */

        if (kind <= 0) {

                if (lm85debug) {

                        printk("lm85: Autodetecting device at %d,0x%02x ...\n",

                        i2c_adapter_id(adapter), address );

                }