root/lm-sensors/trunk/kernel/chips/adm1026.c @ 2445

/*
    adm1026.c - Part of lm_sensors, Linux kernel modules for hardware
             monitoring
    Copyright (c) 2002, 2003  Philip Pokorny <ppokorny@penguincomputing.com>

    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.

    CHANGELOG

    2003-03-13   Initial development
    2003-05-07   First Release.  Includes GPIO fixup and full
                 functionality.
    2003-05-18   Minor fixups and tweaks.
                 Print GPIO config after fixup.
                 Adjust fan MIN if DIV changes.
    2003-05-21   Fix printing of FAN/GPIO config
                 Fix silly bug in fan_div logic
                 Fix fan_min handling so that 0xff is 0 is 0xff
    2003-05-25   Fix more silly typos...
    2003-06-11   Change FAN_xx_REG macros to use different scaling
                 Most (all?) drivers assume two pulses per rev fans
                 and the old scaling was producing double the RPM's
                 Thanks to Jerome Hsiao @ Arima for pointing this out.
        2004-01-27   Remove use of temporary ID.
                 Define addresses as a range.
*/

#include <linux/version.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/i2c-proc.h>
#include <linux/init.h>
#include "version.h"
#include "sensors_vid.h"

#ifndef I2C_DRIVERID_ADM1026
#define I2C_DRIVERID_ADM1026    1048
#endif

/* Addresses to scan */
static unsigned short normal_i2c[] = { SENSORS_I2C_END };
static unsigned short normal_i2c_range[] = { 0x2c, 0x2e, SENSORS_I2C_END };
static unsigned int normal_isa[] = { SENSORS_ISA_END };
static unsigned int normal_isa_range[] = { SENSORS_ISA_END };

/* Insmod parameters */
SENSORS_INSMOD_1(adm1026);

static int gpio_input[17]  = { -1, -1, -1, -1, -1, -1, -1, -1, -1,
                                -1, -1, -1, -1, -1, -1, -1, -1 };
static int gpio_output[17] = { -1, -1, -1, -1, -1, -1, -1, -1, -1,
                                -1, -1, -1, -1, -1, -1, -1, -1 };
static int gpio_inverted[17] = { -1, -1, -1, -1, -1, -1, -1, -1, -1,
                                -1, -1, -1, -1, -1, -1, -1, -1 };
static int gpio_normal[17] = { -1, -1, -1, -1, -1, -1, -1, -1, -1,
                                -1, -1, -1, -1, -1, -1, -1, -1 };
static int gpio_fan[8] = { -1, -1, -1, -1, -1, -1, -1, -1 };
MODULE_PARM(gpio_input,"1-17i");
MODULE_PARM_DESC(gpio_input,"List of GPIO pins (0-16) to program as inputs");
MODULE_PARM(gpio_output,"1-17i");
MODULE_PARM_DESC(gpio_output,"List of GPIO pins (0-16) to program as outputs");
MODULE_PARM(gpio_inverted,"1-17i");
MODULE_PARM_DESC(gpio_inverted,"List of GPIO pins (0-16) to program as inverted");
MODULE_PARM(gpio_normal,"1-17i");
MODULE_PARM_DESC(gpio_normal,"List of GPIO pins (0-16) to program as normal/non-inverted");
MODULE_PARM(gpio_fan,"1-8i");
MODULE_PARM_DESC(gpio_fan,"List of GPIO pins (0-7) to program as fan tachs");

/* Many ADM1026 constants specified below */

/* The ADM1026 registers */
#define ADM1026_REG_CONFIG1  (0x00)
#define CFG1_MONITOR     (0x01)
#define CFG1_INT_ENABLE  (0x02)
#define CFG1_INT_CLEAR   (0x04)
#define CFG1_AIN8_9      (0x08)
#define CFG1_THERM_HOT   (0x10)
#define CFG1_DAC_AFC     (0x20)
#define CFG1_PWM_AFC     (0x40)
#define CFG1_RESET       (0x80)
#define ADM1026_REG_CONFIG2  (0x01)
/* CONFIG2 controls FAN0/GPIO0 through FAN7/GPIO7 */
#define ADM1026_REG_CONFIG3  (0x07)
#define CFG3_GPIO16_ENABLE  (0x01)
#define CFG3_CI_CLEAR  (0x02)
#define CFG3_VREF_250  (0x04)
#define CFG3_GPIO16_DIR  (0x40)
#define CFG3_GPIO16_POL  (0x80)
#define ADM1026_REG_E2CONFIG  (0x13)
#define E2CFG_READ  (0x01)
#define E2CFG_WRITE  (0x02)
#define E2CFG_ERASE  (0x04)
#define E2CFG_ROM  (0x08)
#define E2CFG_CLK_EXT  (0x80)

/* There are 10 general analog inputs and 7 dedicated inputs
 * They are:
 *    0 - 9  =  AIN0 - AIN9
 *       10  =  Vbat
 *       11  =  3.3V Standby
 *       12  =  3.3V Main
 *       13  =  +5V
 *       14  =  Vccp (CPU core voltage)
 *       15  =  +12V
 *       16  =  -12V
 */
static u16 REG_IN[] = {
                0x30, 0x31, 0x32, 0x33, 0x34, 0x35,
                0x36, 0x37, 0x27, 0x29, 0x26, 0x2a,
                0x2b, 0x2c, 0x2d, 0x2e, 0x2f
        };
static u16 REG_IN_MIN[] = {
                0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d,
                0x5e, 0x5f, 0x6d, 0x49, 0x6b, 0x4a,
                0x4b, 0x4c, 0x4d, 0x4e, 0x4f
        };
static u16 REG_IN_MAX[] = {
                0x50, 0x51, 0x52, 0x53, 0x54, 0x55,
                0x56, 0x57, 0x6c, 0x41, 0x6a, 0x42,
                0x43, 0x44, 0x45, 0x46, 0x47
        };
#define ADM1026_REG_IN(nr) (REG_IN[(nr)])
#define ADM1026_REG_IN_MIN(nr) (REG_IN_MIN[(nr)])
#define ADM1026_REG_IN_MAX(nr) (REG_IN_MAX[(nr)])

/* Temperatures are:
 *    0 - Internal
 *    1 - External 1
 *    2 - External 2
 */
static u16 REG_TEMP[] = { 0x1f, 0x28, 0x29 };
static u16 REG_TEMP_MIN[] = { 0x69, 0x48, 0x49 };
static u16 REG_TEMP_MAX[] = { 0x68, 0x40, 0x41 };
static u16 REG_TEMP_TMIN[] = { 0x10, 0x11, 0x12 };
static u16 REG_TEMP_THERM[] = { 0x0d, 0x0e, 0x0f };
static u16 REG_TEMP_OFFSET[] = { 0x1e, 0x6e, 0x6f };
#define ADM1026_REG_TEMP(nr) (REG_TEMP[(nr)])
#define ADM1026_REG_TEMP_MIN(nr) (REG_TEMP_MIN[(nr)])
#define ADM1026_REG_TEMP_MAX(nr) (REG_TEMP_MAX[(nr)])
#define ADM1026_REG_TEMP_TMIN(nr) (REG_TEMP_TMIN[(nr)])
#define ADM1026_REG_TEMP_THERM(nr) (REG_TEMP_THERM[(nr)])
#define ADM1026_REG_TEMP_OFFSET(nr) (REG_TEMP_OFFSET[(nr)])

#define ADM1026_REG_FAN(nr) (0x38 + (nr))
#define ADM1026_REG_FAN_MIN(nr) (0x60 + (nr))
#define ADM1026_REG_FAN_DIV_0_3 (0x02)
#define ADM1026_REG_FAN_DIV_4_7 (0x03)

#define ADM1026_REG_DAC  (0x04)
#define ADM1026_REG_PWM  (0x05)

#define ADM1026_REG_GPIO_CFG_0_3 (0x08)
#define ADM1026_REG_GPIO_CFG_4_7 (0x09)
#define ADM1026_REG_GPIO_CFG_8_11 (0x0a)
#define ADM1026_REG_GPIO_CFG_12_15 (0x0b)
/* CFG_16 in REG_CFG3 */
#define ADM1026_REG_GPIO_STATUS_0_7 (0x24)
#define ADM1026_REG_GPIO_STATUS_8_15 (0x25)
/* STATUS_16 in REG_STATUS4 */
#define ADM1026_REG_GPIO_MASK_0_7 (0x1c)
#define ADM1026_REG_GPIO_MASK_8_15 (0x1d)
/* MASK_16 in REG_MASK4 */

#define ADM1026_REG_COMPANY 0x16
#define ADM1026_REG_VERSTEP 0x17
/* These are the recognized values for the above regs */
#define ADM1026_COMPANY_ANALOG_DEV 0x41
#define ADM1026_VERSTEP_GENERIC 0x40
#define ADM1026_VERSTEP_ADM1026 0x44

#define ADM1026_REG_MASK1 0x18
#define ADM1026_REG_MASK2 0x19
#define ADM1026_REG_MASK3 0x1a
#define ADM1026_REG_MASK4 0x1b

#define ADM1026_REG_STATUS1 0x20
#define ADM1026_REG_STATUS2 0x21
#define ADM1026_REG_STATUS3 0x22
#define ADM1026_REG_STATUS4 0x23

/* 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.  These are the
 *   voltages corresponding to 3/4 of full scale (192 or 0xc0)
 *   NOTE: The -12V input needs an additional factor to account
 *      for the Vref pullup resistor.
 *      NEG12_OFFSET = SCALE * Vref / V-192 - Vref
 *                   = 13875 * 2.50 / 1.875 - 2500
 *                   = 16000
 */
#if 1
/* The values in this table are based on Table II, page 15 of the
 *    datasheet.
 */
static int adm1026_scaling[] = {  /* .001 Volts */
                2250, 2250, 2250, 2250, 2250, 2250, 
                1875, 1875, 1875, 1875, 3000, 3330, 
                3330, 4995, 2250, 12000, 13875
        };
#define NEG12_OFFSET  16000
#else
/* The values in this table are based on the resistors in 
 *    Figure 5 on page 16.  But the 3.3V inputs are not in
 *    the figure and the values for the 5V input are wrong.
 *    For 5V, I'm guessing that R2 at 55.2k is right, but
 *    the total resistance should be 1400 or 1449 like the
 *    other inputs.  Using 1449, gives 4.922V at 192.
 */
static int adm1026_scaling[] = {  /* .001 Volts */
                2249, 2249, 2249, 2249, 2249, 2249, 
                1875, 1875, 1875, 1875, 3329, 3329, 
                3329, 4922, 2249, 11969, 13889
        };
#define NEG12_OFFSET  16019
#endif

#define SCALE(val,from,to) (((val)*(to) + ((from)/2))/(from))
#define INS_TO_REG(n,val)  (SENSORS_LIMIT(SCALE(val,adm1026_scaling[n],192),0,255))
#if 0   /* If we have extended A/D bits */
#define INSEXT_FROM_REG(n,val,ext) (SCALE((val)*4 + (ext),192*4,adm1026_scaling[n]))
#define INS_FROM_REG(n,val) (INSEXT_FROM_REG(n,val,0))
#else
#define INS_FROM_REG(n,val) (SCALE(val,192,adm1026_scaling[n]))
#endif

/* FAN speed is measured using 22.5kHz clock and counts for 2 pulses
 *   and we assume a 2 pulse-per-rev fan tach signal
 *      22500 kHz * 60 (sec/min) * 2 (pulse) / 2 (pulse/rev) == 1350000
 */
#define FAN_TO_REG(val,div)  ((val)<=0 ? 0xff : SENSORS_LIMIT(1350000/((val)*(div)),1,254))
#define FAN_FROM_REG(val,div) ((val)==0?-1:(val)==0xff ? 0 : 1350000/((val)*(div)))
#define DIV_FROM_REG(val) (1<<(val))
#define DIV_TO_REG(val) ((val)>=8 ? 3 : (val)>=4 ? 2 : (val)>=2 ? 1 : 0)

/* Temperature is reported in 1 degC increments */
#define TEMP_TO_REG(val) (SENSORS_LIMIT(val,-127,127))
#define TEMP_FROM_REG(val) (val)
#define OFFSET_TO_REG(val) (SENSORS_LIMIT(val,-127,127))
#define OFFSET_FROM_REG(val) (val)

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

/* Analog output is a voltage, but it's used like a PWM
 *   Seems like this should be scaled, but to be consistent
 *   with other drivers, we do it this way.
 */
#define DAC_TO_REG(val) (SENSORS_LIMIT(val,0,255))
#define DAC_FROM_REG(val) (val)

/* sensors_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.
 */

/* Typically used with systems using a v9.1 VRM spec ? */
#define ADM1026_INIT_VRM  91
#define ADM1026_INIT_VID  -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
 *    So, we keep the config data up to date in the cache
 *    when it is written and only sample it once every 5 *minutes*
 */
#define ADM1026_DATA_INTERVAL  (1 * HZ)
#define ADM1026_CONFIG_INTERVAL  (5 * 60 * HZ)

/* We allow for multiple chips in a single system.
 *
 * For each registered ADM1026, we need to keep state information
 * at client->data. The adm1026_data structure is dynamically
 * allocated, when a new client structure is allocated. */

struct adm1026_data {
        struct i2c_client client;
        struct semaphore lock;
        int sysctl_id;
        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[17];              /* Register value */
        u8 in_max[17];          /* Register value */
        u8 in_min[17];          /* Register value */
        s8 temp[3];             /* Register value */
        s8 temp_min[3];         /* Register value */
        s8 temp_max[3];         /* Register value */
        s8 temp_tmin[3];        /* Register value */
        s8 temp_therm[3];       /* Register value */
        s8 temp_offset[3];      /* Register value */
        u8 fan[8];              /* Register value */
        u8 fan_min[8];          /* Register value */
        u8 fan_div[8];          /* Decoded value */
        u8 pwm;                 /* Register value */
        u8 analog_out;          /* Register value */
        int vid;                /* Decoded value */
        u8 vrm;                 /* VRM version */
        long alarms;            /* Register encoding, combined */
        long alarm_mask;        /* Register encoding, combined */
        long gpio;              /* Register encoding, combined */
        long gpio_mask;         /* Register encoding, combined */
        u8 gpio_config[17];     /* Decoded value */
        u8 config1;             /* Register value */
        u8 config2;             /* Register value */
        u8 config3;             /* Register value */
};

static int adm1026_attach_adapter(struct i2c_adapter *adapter);
static int adm1026_detect(struct i2c_adapter *adapter, int address,
                        unsigned short flags, int kind);
static int adm1026_detach_client(struct i2c_client *client);

static int adm1026_read_value(struct i2c_client *client, u8 register);
static int adm1026_write_value(struct i2c_client *client, u8 register, int value);
static void adm1026_print_gpio(struct i2c_client *client);
static void adm1026_fixup_gpio(struct i2c_client *client);
static void adm1026_update_client(struct i2c_client *client);
static void adm1026_init_client(struct i2c_client *client);


static void adm1026_in(struct i2c_client *client, int operation, int ctl_name,
                        int *nrels_mag, long *results);
static void adm1026_in16(struct i2c_client *client, int operation, int ctl_name,
                        int *nrels_mag, long *results);
static void adm1026_fan(struct i2c_client *client, int operation,
                        int ctl_name, int *nrels_mag, long *results);
static void adm1026_fixup_fan_min(struct i2c_client *client,
                         int fan, int old_div);
static void adm1026_fan_div(struct i2c_client *client, int operation,
                        int ctl_name, int *nrels_mag, long *results);
static void adm1026_temp(struct i2c_client *client, int operation,
                        int ctl_name, int *nrels_mag, long *results);
static void adm1026_temp_offset(struct i2c_client *client, int operation,
                        int ctl_name, int *nrels_mag, long *results);
static void adm1026_temp_tmin(struct i2c_client *client, int operation,
                        int ctl_name, int *nrels_mag, long *results);
static void adm1026_temp_therm(struct i2c_client *client, int operation,
                        int ctl_name, int *nrels_mag, long *results);
static void adm1026_vid(struct i2c_client *client, int operation,
                        int ctl_name, int *nrels_mag, long *results);
static void adm1026_vrm(struct i2c_client *client, int operation,
                        int ctl_name, int *nrels_mag, long *results);
static void adm1026_alarms(struct i2c_client *client, int operation,
                        int ctl_name, int *nrels_mag, long *results);
static void adm1026_alarm_mask(struct i2c_client *client, int operation,
                        int ctl_name, int *nrels_mag, long *results);
static void adm1026_gpio(struct i2c_client *client, int operation,
                        int ctl_name, int *nrels_mag, long *results);
static void adm1026_gpio_mask(struct i2c_client *client, int operation,
                        int ctl_name, int *nrels_mag, long *results);
static void adm1026_pwm(struct i2c_client *client, int operation,
                        int ctl_name, int *nrels_mag, long *results);
static void adm1026_analog_out(struct i2c_client *client, int operation,
                        int ctl_name, int *nrels_mag, long *results);
static void adm1026_afc(struct i2c_client *client, int operation,
                        int ctl_name, int *nrels_mag, long *results);

static struct i2c_driver adm1026_driver = {
        .owner          = THIS_MODULE,
        .name           = "ADM1026 compatible sensor driver",
        .id             = I2C_DRIVERID_ADM1026,
        .flags          = I2C_DF_NOTIFY,
        .attach_adapter = &adm1026_attach_adapter,
        .detach_client  = &adm1026_detach_client,
};

/* Unique ID assigned to each ADM1026 detected */
static int adm1026_id = 0;

/* -- SENSORS SYSCTL START -- */
#define ADM1026_SYSCTL_FAN0                 1000
#define ADM1026_SYSCTL_FAN1                 1001
#define ADM1026_SYSCTL_FAN2                 1002
#define ADM1026_SYSCTL_FAN3                 1003
#define ADM1026_SYSCTL_FAN4                 1004
#define ADM1026_SYSCTL_FAN5                 1005
#define ADM1026_SYSCTL_FAN6                 1006
#define ADM1026_SYSCTL_FAN7                 1007
#define ADM1026_SYSCTL_FAN_DIV              1008
#define ADM1026_SYSCTL_GPIO                 1009
#define ADM1026_SYSCTL_GPIO_MASK            1010
#define ADM1026_SYSCTL_ALARMS               1011
#define ADM1026_SYSCTL_ALARM_MASK           1012
#define ADM1026_SYSCTL_IN0                  1013
#define ADM1026_SYSCTL_IN1                  1014
#define ADM1026_SYSCTL_IN2                  1015
#define ADM1026_SYSCTL_IN3                  1016
#define ADM1026_SYSCTL_IN4                  1017
#define ADM1026_SYSCTL_IN5                  1018
#define ADM1026_SYSCTL_IN6                  1019
#define ADM1026_SYSCTL_IN7                  1020
#define ADM1026_SYSCTL_IN8                  1021
#define ADM1026_SYSCTL_IN9                  1022
#define ADM1026_SYSCTL_IN10                 1023
#define ADM1026_SYSCTL_IN11                 1024
#define ADM1026_SYSCTL_IN12                 1025
#define ADM1026_SYSCTL_IN13                 1026
#define ADM1026_SYSCTL_IN14                 1027
#define ADM1026_SYSCTL_IN15                 1028
#define ADM1026_SYSCTL_IN16                 1029
#define ADM1026_SYSCTL_PWM                  1030
#define ADM1026_SYSCTL_ANALOG_OUT           1031
#define ADM1026_SYSCTL_AFC                  1032
#define ADM1026_SYSCTL_TEMP1                1033
#define ADM1026_SYSCTL_TEMP2                1034
#define ADM1026_SYSCTL_TEMP3                1035
#define ADM1026_SYSCTL_TEMP_OFFSET1         1036
#define ADM1026_SYSCTL_TEMP_OFFSET2         1037
#define ADM1026_SYSCTL_TEMP_OFFSET3         1038
#define ADM1026_SYSCTL_TEMP_THERM1          1039
#define ADM1026_SYSCTL_TEMP_THERM2          1040
#define ADM1026_SYSCTL_TEMP_THERM3          1041
#define ADM1026_SYSCTL_TEMP_TMIN1           1042
#define ADM1026_SYSCTL_TEMP_TMIN2           1043
#define ADM1026_SYSCTL_TEMP_TMIN3           1044
#define ADM1026_SYSCTL_VID                  1045
#define ADM1026_SYSCTL_VRM                  1046

#define ADM1026_ALARM_TEMP2   (1L <<  0)
#define ADM1026_ALARM_TEMP3   (1L <<  1)
#define ADM1026_ALARM_IN9     (1L <<  1)
#define ADM1026_ALARM_IN11    (1L <<  2)
#define ADM1026_ALARM_IN12    (1L <<  3)
#define ADM1026_ALARM_IN13    (1L <<  4)
#define ADM1026_ALARM_IN14    (1L <<  5)
#define ADM1026_ALARM_IN15    (1L <<  6)
#define ADM1026_ALARM_IN16    (1L <<  7)
#define ADM1026_ALARM_IN0     (1L <<  8)
#define ADM1026_ALARM_IN1     (1L <<  9)
#define ADM1026_ALARM_IN2     (1L << 10)
#define ADM1026_ALARM_IN3     (1L << 11)
#define ADM1026_ALARM_IN4     (1L << 12)
#define ADM1026_ALARM_IN5     (1L << 13)
#define ADM1026_ALARM_IN6     (1L << 14)
#define ADM1026_ALARM_IN7     (1L << 15)
#define ADM1026_ALARM_FAN0    (1L << 16)
#define ADM1026_ALARM_FAN1    (1L << 17)
#define ADM1026_ALARM_FAN2    (1L << 18)
#define ADM1026_ALARM_FAN3    (1L << 19)
#define ADM1026_ALARM_FAN4    (1L << 20)
#define ADM1026_ALARM_FAN5    (1L << 21)
#define ADM1026_ALARM_FAN6    (1L << 22)
#define ADM1026_ALARM_FAN7    (1L << 23)
#define ADM1026_ALARM_TEMP1   (1L << 24)
#define ADM1026_ALARM_IN10    (1L << 25)
#define ADM1026_ALARM_IN8     (1L << 26)
#define ADM1026_ALARM_THERM   (1L << 27)
#define ADM1026_ALARM_AFC_FAN (1L << 28)
#define ADM1026_ALARM_UNUSED  (1L << 29)
#define ADM1026_ALARM_CI      (1L << 30)
/* -- SENSORS SYSCTL END -- */

/* The /proc/sys entries */
/* These files are created for each detected ADM1026. This is just a template;
 *    The actual list is built from this and additional per-chip
 *    custom lists below.  Note the XXX_LEN macros.  These must be
 *    compile time constants because they will be used to allocate
 *    space for the final template passed to i2c_register_entry.
 *    We depend on the ability of GCC to evaluate expressions at
 *    compile time to turn these expressions into compile time
 *    constants, but this can generate a warning.
 */
static ctl_table adm1026_common[] = {
        {ADM1026_SYSCTL_IN0, "in0", NULL, 0, 0644, NULL, &i2c_proc_real,
                &i2c_sysctl_real, NULL, &adm1026_in},
        {ADM1026_SYSCTL_IN1, "in1", NULL, 0, 0644, NULL, &i2c_proc_real,
                &i2c_sysctl_real, NULL, &adm1026_in},
        {ADM1026_SYSCTL_IN2, "in2", NULL, 0, 0644, NULL, &i2c_proc_real,
                &i2c_sysctl_real, NULL, &adm1026_in},
        {ADM1026_SYSCTL_IN3, "in3", NULL, 0, 0644, NULL, &i2c_proc_real,
                &i2c_sysctl_real, NULL, &adm1026_in},
        {ADM1026_SYSCTL_IN4, "in4", NULL, 0, 0644, NULL, &i2c_proc_real,
                &i2c_sysctl_real, NULL, &adm1026_in},
        {ADM1026_SYSCTL_IN5, "in5", NULL, 0, 0644, NULL, &i2c_proc_real,
                &i2c_sysctl_real, NULL, &adm1026_in},
        {ADM1026_SYSCTL_IN6, "in6", NULL, 0, 0644, NULL, &i2c_proc_real,
                &i2c_sysctl_real, NULL, &adm1026_in},
        {ADM1026_SYSCTL_IN7, "in7", NULL, 0, 0644, NULL, &i2c_proc_real,
                &i2c_sysctl_real, NULL, &adm1026_in},
        {ADM1026_SYSCTL_IN8, "in8", NULL, 0, 0644, NULL, &i2c_proc_real,
                &i2c_sysctl_real, NULL, &adm1026_in},
        {ADM1026_SYSCTL_IN9, "in9", NULL, 0, 0644, NULL, &i2c_proc_real,
                &i2c_sysctl_real, NULL, &adm1026_in},
        {ADM1026_SYSCTL_IN10, "in10", NULL, 0, 0644, NULL, &i2c_proc_real,
                &i2c_sysctl_real, NULL, &adm1026_in},
        {ADM1026_SYSCTL_IN11, "in11", NULL, 0, 0644, NULL, &i2c_proc_real,
                &i2c_sysctl_real, NULL, &adm1026_in},
        {ADM1026_SYSCTL_IN12, "in12", NULL, 0, 0644, NULL, &i2c_proc_real,
                &i2c_sysctl_real, NULL, &adm1026_in},
        {ADM1026_SYSCTL_IN13, "in13", NULL, 0, 0644, NULL, &i2c_proc_real,
                &i2c_sysctl_real, NULL, &adm1026_in},
        {ADM1026_SYSCTL_IN14, "in14", NULL, 0, 0644, NULL, &i2c_proc_real,
                &i2c_sysctl_real, NULL, &adm1026_in},
        {ADM1026_SYSCTL_IN15, "in15", NULL, 0, 0644, NULL, &i2c_proc_real,
                &i2c_sysctl_real, NULL, &adm1026_in},
        {ADM1026_SYSCTL_IN16, "in16", NULL, 0, 0644, NULL, &i2c_proc_real,
                &i2c_sysctl_real, NULL, &adm1026_in16},

        {ADM1026_SYSCTL_FAN0, "fan0", NULL, 0, 0644, NULL, &i2c_proc_real,
                &i2c_sysctl_real, NULL, &adm1026_fan},
        {ADM1026_SYSCTL_FAN1, "fan1", NULL, 0, 0644, NULL, &i2c_proc_real,
                &i2c_sysctl_real, NULL, &adm1026_fan},
        {ADM1026_SYSCTL_FAN2, "fan2", NULL, 0, 0644, NULL, &i2c_proc_real,
                &i2c_sysctl_real, NULL, &adm1026_fan},
        {ADM1026_SYSCTL_FAN3, "fan3", NULL, 0, 0644, NULL, &i2c_proc_real,
                &i2c_sysctl_real, NULL, &adm1026_fan},
        {ADM1026_SYSCTL_FAN4, "fan4", NULL, 0, 0644, NULL, &i2c_proc_real,
                &i2c_sysctl_real, NULL, &adm1026_fan},
        {ADM1026_SYSCTL_FAN5, "fan5", NULL, 0, 0644, NULL, &i2c_proc_real,
                &i2c_sysctl_real, NULL, &adm1026_fan},
        {ADM1026_SYSCTL_FAN6, "fan6", NULL, 0, 0644, NULL, &i2c_proc_real,
                &i2c_sysctl_real, NULL, &adm1026_fan},
        {ADM1026_SYSCTL_FAN7, "fan7", NULL, 0, 0644, NULL, &i2c_proc_real,
                &i2c_sysctl_real, NULL, &adm1026_fan},
        {ADM1026_SYSCTL_FAN_DIV, "fan_div", NULL, 0, 0644, NULL,
                &i2c_proc_real, &i2c_sysctl_real, NULL, &adm1026_fan_div},

        {ADM1026_SYSCTL_TEMP1, "temp1", NULL, 0, 0644, NULL, &i2c_proc_real,
                &i2c_sysctl_real, NULL, &adm1026_temp},
        {ADM1026_SYSCTL_TEMP2, "temp2", NULL, 0, 0644, NULL, &i2c_proc_real,
                &i2c_sysctl_real, NULL, &adm1026_temp},
        {ADM1026_SYSCTL_TEMP3, "temp3", NULL, 0, 0644, NULL, &i2c_proc_real,
                &i2c_sysctl_real, NULL, &adm1026_temp},
        {ADM1026_SYSCTL_TEMP_OFFSET1, "temp1_offset", NULL, 0, 0644, NULL,
                &i2c_proc_real, &i2c_sysctl_real, NULL, &adm1026_temp_offset},
        {ADM1026_SYSCTL_TEMP_OFFSET2, "temp2_offset", NULL, 0, 0644, NULL,
                &i2c_proc_real, &i2c_sysctl_real, NULL, &adm1026_temp_offset},
        {ADM1026_SYSCTL_TEMP_OFFSET3, "temp3_offset", NULL, 0, 0644, NULL,
                &i2c_proc_real, &i2c_sysctl_real, NULL, &adm1026_temp_offset},
        {ADM1026_SYSCTL_TEMP_TMIN1, "temp1_tmin", NULL, 0, 0644, NULL,
                &i2c_proc_real, &i2c_sysctl_real, NULL, &adm1026_temp_tmin},
        {ADM1026_SYSCTL_TEMP_TMIN2, "temp2_tmin", NULL, 0, 0644, NULL,
                &i2c_proc_real, &i2c_sysctl_real, NULL, &adm1026_temp_tmin},
        {ADM1026_SYSCTL_TEMP_TMIN3, "temp3_tmin", NULL, 0, 0644, NULL,
                &i2c_proc_real, &i2c_sysctl_real, NULL, &adm1026_temp_tmin},
        {ADM1026_SYSCTL_TEMP_THERM1, "temp1_therm", NULL, 0, 0644, NULL,
                &i2c_proc_real, &i2c_sysctl_real, NULL, &adm1026_temp_therm},
        {ADM1026_SYSCTL_TEMP_THERM2, "temp2_therm", NULL, 0, 0644, NULL,
                &i2c_proc_real, &i2c_sysctl_real, NULL, &adm1026_temp_therm},
        {ADM1026_SYSCTL_TEMP_THERM3, "temp3_therm", NULL, 0, 0644, NULL,
                &i2c_proc_real, &i2c_sysctl_real, NULL, &adm1026_temp_therm},

        {ADM1026_SYSCTL_VID, "vid", NULL, 0, 0644, NULL, &i2c_proc_real,
                &i2c_sysctl_real, NULL, &adm1026_vid},
        {ADM1026_SYSCTL_VRM, "vrm", NULL, 0, 0644, NULL, &i2c_proc_real,
                &i2c_sysctl_real, NULL, &adm1026_vrm},

        {ADM1026_SYSCTL_ALARMS, "alarms", NULL, 0, 0444, NULL, &i2c_proc_real,
                &i2c_sysctl_real, NULL, &adm1026_alarms},
        {ADM1026_SYSCTL_ALARM_MASK, "alarm_mask", NULL, 0, 0644, NULL,
                &i2c_proc_real, &i2c_sysctl_real, NULL, &adm1026_alarm_mask},

        {ADM1026_SYSCTL_GPIO, "gpio", NULL, 0, 0644, NULL, &i2c_proc_real,
                &i2c_sysctl_real, NULL, &adm1026_gpio},
        {ADM1026_SYSCTL_GPIO_MASK, "gpio_mask", NULL, 0, 0644, NULL,
                &i2c_proc_real, &i2c_sysctl_real, NULL, &adm1026_gpio_mask},

        {ADM1026_SYSCTL_PWM, "pwm", NULL, 0, 0644, NULL, &i2c_proc_real,
                &i2c_sysctl_real, NULL, &adm1026_pwm},
        {ADM1026_SYSCTL_ANALOG_OUT, "analog_out", NULL, 0, 0644, NULL,
                &i2c_proc_real, &i2c_sysctl_real, NULL, &adm1026_analog_out},
        {ADM1026_SYSCTL_AFC, "afc", NULL, 0, 0644, NULL, &i2c_proc_real,
                &i2c_sysctl_real, NULL, &adm1026_afc},

        {0}
};
#define CTLTBL_COMMON (sizeof(adm1026_common)/sizeof(adm1026_common[0]))

#define MAX2(a,b) ((a)>(b)?(a):(b))
#define MAX3(a,b,c) ((a)>(b)?MAX2((a),(c)):MAX2((b),(c)))
#define MAX4(a,b,c,d) ((a)>(b)?MAX3((a),(c),(d)):MAX3((b),(c),(d)))

#define CTLTBL_MAX (CTLTBL_COMMON)

/* This function is called when:
     * the module is loaded
     * a new adapter is loaded
 */
int adm1026_attach_adapter(struct i2c_adapter *adapter)
{
        return i2c_detect(adapter, &addr_data, adm1026_detect);
}

/* This function is called by i2c_detect */
int adm1026_detect(struct i2c_adapter *adapter, int address,
                unsigned short flags, int kind)
{
        int i;
        int company, verstep ;
        struct i2c_client *new_client;
        struct adm1026_data *data;
        int err = 0;
        const char *type_name = "";
        struct ctl_table template[CTLTBL_MAX] ;
        struct ctl_table * template_next = template ;

        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 adm1026_{read,write}_value. */

        if (!(data = kmalloc(sizeof(struct adm1026_data), GFP_KERNEL))) {
                err = -ENOMEM;
                goto ERROR0;
        }

        new_client = &data->client;
        new_client->addr = address;
        new_client->data = data;
        new_client->adapter = adapter;
        new_client->driver = &adm1026_driver;
        new_client->flags = 0;

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

        company = adm1026_read_value(new_client, ADM1026_REG_COMPANY);
        verstep = adm1026_read_value(new_client, ADM1026_REG_VERSTEP);

#ifdef DEBUG
        printk("adm1026: 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
            );
#endif

        /* If auto-detecting, Determine the chip type. */
        if (kind <= 0) {
#ifdef DEBUG
                printk("adm1026: Autodetecting device at %d,0x%02x ...\n",
                        i2c_adapter_id(adapter), address );
#endif
                if( company == ADM1026_COMPANY_ANALOG_DEV
                    && verstep == ADM1026_VERSTEP_ADM1026 ) {
                        kind = adm1026 ;
                } else if( company == ADM1026_COMPANY_ANALOG_DEV
                    && (verstep & 0xf0) == ADM1026_VERSTEP_GENERIC ) {
                        printk("adm1026: Unrecgonized stepping 0x%02x"
                            " Defaulting to ADM1026.\n", verstep );
                        kind = adm1026 ;
                } else if( (verstep & 0xf0) == ADM1026_VERSTEP_GENERIC ) {
                        printk("adm1026: Found version/stepping 0x%02x"
                            " Assuming generic ADM1026.\n", verstep );
                        kind = any_chip ;
                } else {
#ifdef DEBUG
                        printk("adm1026: Autodetection failed\n");
#endif
                        /* Not an ADM1026 ... */
                        if( kind == 0 ) {  /* User used force=x,y */
                            printk("adm1026: Generic ADM1026 Version 6 not"
                                " found at %d,0x%02x. Try force_adm1026.\n",
                                i2c_adapter_id(adapter), address );
                        }
                        err = 0 ;
                        goto ERROR1;
                }
        }

        /* Fill in the chip specific driver values */
        switch (kind) {
        case any_chip :
                type_name = "adm1026";
                strcpy(new_client->name, "Generic ADM1026");
                template_next = template ;  /* None used */
                break ;
        case adm1026 :
                type_name = "adm1026";
                strcpy(new_client->name, "Analog Devices ADM1026");
                template_next = template ;
                break ;
#if 0
        /* Example of another adm1026 "compatible" device */
        case adx1000 :
                type_name = "adx1000";
                strcpy(new_client->name, "Compatible ADX1000");
                memcpy( template, adx_specific, sizeof(adx_specific) );
                template_next = template + CTLTBL_ADX1000 ;
                break ;
#endif
        default :
                printk("adm1026: Internal error, invalid kind (%d)!", kind);
                err = -EFAULT ;
                goto ERROR1;
        }

        /* Fill in the remaining client fields */
        new_client->id = adm1026_id++;
        printk("adm1026(%d): Assigning ID %d to %s at %d,0x%02x\n",
                new_client->id, new_client->id, new_client->name,
                i2c_adapter_id(new_client->adapter),
                new_client->addr
            );

        /* Housekeeping values */
        data->type = kind;
        data->valid = 0;

        /* Set the VRM version */
        data->vrm = ADM1026_INIT_VRM ;
        data->vid = ADM1026_INIT_VID ;

        init_MUTEX(&data->update_lock);

        /* Initialize the ADM1026 chip */
        adm1026_init_client(new_client);

        /* Tell the I2C layer a new client has arrived */
        if ((err = i2c_attach_client(new_client)))
                goto ERROR1;

        /* Finish out the template */
        memcpy(template_next, adm1026_common, sizeof(adm1026_common));

        /* Register a new directory entry with module sensors */
        if ((i = i2c_register_entry(new_client,
                                        type_name,
                                        template)) < 0) {
                err = i;
                goto ERROR2;
        }
        data->sysctl_id = i;

        return 0;

        /* Error out and cleanup code */
    ERROR2:
        i2c_detach_client(new_client);
    ERROR1:
        kfree(data);
    ERROR0:
        return err;
}

int adm1026_detach_client(struct i2c_client *client)
{
        int err;
        int id ;

        id = client->id;
        i2c_deregister_entry(((struct adm1026_data *)(client->data))->sysctl_id);

        if ((err = i2c_detach_client(client))) {
                printk("adm1026(%d): Client deregistration failed,"
                        " client not detached.\n", id );
                return err;
        }

        kfree(client->data);

        return 0;
}

int adm1026_read_value(struct i2c_client *client, u8 reg)
{
        int res;

        if( reg < 0x80 ) {
                /* "RAM" locations */
                res = i2c_smbus_read_byte_data(client, reg) & 0xff ;
        } else {
                /* EEPROM, do nothing */
                res = 0 ;
        }

        return res ;
}

int adm1026_write_value(struct i2c_client *client, u8 reg, int value)
{
        int res ;

        if( reg < 0x80 ) {
                /* "RAM" locations */
                res = i2c_smbus_write_byte_data(client, reg, value);
        } else {
                /* EEPROM, do nothing */
                res = 0 ;
        }

        return res ;
}

/* Called when we have found a new ADM1026. */
void adm1026_init_client(struct i2c_client *client)
{
        int value ;
        int i;
        struct adm1026_data *data = client->data;

#ifdef DEBUG
        printk("adm1026(%d): Initializing device\n", client->id);
#endif

        /* Read chip config */
        data->config1 = adm1026_read_value(client, ADM1026_REG_CONFIG1);
        data->config2 = adm1026_read_value(client, ADM1026_REG_CONFIG2);
        data->config3 = adm1026_read_value(client, ADM1026_REG_CONFIG3);

        /* Inform user of chip config */
#ifdef DEBUG
        printk("adm1026(%d): ADM1026_REG_CONFIG1 is: 0x%02x\n",
                client->id, data->config1 );
#endif
        if( (data->config1 & CFG1_MONITOR) == 0 ) {
                printk("adm1026(%d): Monitoring not currently enabled.\n",
                            client->id );
        }
        if( data->config1 & CFG1_INT_ENABLE ) {
                printk("adm1026(%d): SMBALERT interrupts are enabled.\n",
                            client->id );
        }
        if( data->config1 & CFG1_AIN8_9 ) {
                printk("adm1026(%d): in8 and in9 enabled.  temp3 disabled.\n",
                            client->id );
        } else {
                printk("adm1026(%d): temp3 enabled.  in8 and in9 disabled.\n",
                            client->id );
        }
        if( data->config1 & CFG1_THERM_HOT ) {
                printk("adm1026(%d): Automatic THERM, PWM, and temp limits enabled.\n",
                            client->id );
        }

        value = data->config3 ;
        if( data->config3 & CFG3_GPIO16_ENABLE ) {
                printk("adm1026(%d): GPIO16 enabled.  THERM pin disabled.\n",
                            client->id );
        } else {
                printk("adm1026(%d): THERM pin enabled.  GPIO16 disabled.\n",
                            client->id );
        }
        if( data->config3 & CFG3_VREF_250 ) {
                printk("adm1026(%d): Vref is 2.50 Volts.\n", client->id );
        } else {
                printk("adm1026(%d): Vref is 1.82 Volts.\n", client->id );
        }

        /* Read and pick apart the existing GPIO configuration */
        value = 0 ;
        for( i = 0 ; i <= 15 ; ++i ) {
                if( (i & 0x03) == 0 ) {
                        value = adm1026_read_value(client,
                                        ADM1026_REG_GPIO_CFG_0_3 + i/4 );
                }
                data->gpio_config[i] = value & 0x03 ;
                value >>= 2 ;
        }
        data->gpio_config[16] = (data->config3 >> 6) & 0x03 ;

        /* ... and then print it */
        adm1026_print_gpio(client);

        /* If the user asks us to reprogram the GPIO config, then
         *   do it now.  But only if this is the first ADM1026.
         */
        if( client->id == 0
            && (gpio_input[0] != -1 || gpio_output[0] != -1
                || gpio_inverted[0] != -1 || gpio_normal[0] != -1
                || gpio_fan[0] != -1 ) ) {
                adm1026_fixup_gpio(client);
        }

        /* WE INTENTIONALLY make no changes to the limits,
         *   offsets, pwms and fans.  If they were
         *   configured, we don't want to mess with them.
         *   If they weren't, the default is generally safe
         *   and will suffice until 'sensors -s' can be run.
         */

        /* Start monitoring */
        value = adm1026_read_value(client, ADM1026_REG_CONFIG1);

        /* Set MONITOR, clear interrupt acknowledge and s/w reset */
        value = (value | CFG1_MONITOR) & (~CFG1_INT_CLEAR & ~CFG1_RESET) ;
#ifdef DEBUG
        printk("adm1026(%d): Setting CONFIG to: 0x%02x\n", client->id, value );
#endif
        data->config1 = value ;
        adm1026_write_value(client, ADM1026_REG_CONFIG1, value);

}

void adm1026_print_gpio(struct i2c_client *client)
{
        struct adm1026_data *data = client->data;
        int  i ;

        printk("adm1026(%d): GPIO config is:\nadm1026(%d):",
                            client->id, client->id );
        for( i = 0 ; i <= 7 ; ++i ) {
                if( data->config2 & (1 << i) ) {
                        printk( " %sGP%s%d",
                                data->gpio_config[i] & 0x02 ? "" : "!",
                                data->gpio_config[i] & 0x01 ? "OUT" : "IN",
                                i );
                } else {
                        printk( " FAN%d", i );
                }
        }
        printk( "\nadm1026(%d):", client->id );
        for( i = 8 ; i <= 15 ; ++i ) {
                printk( " %sGP%s%d",
                        data->gpio_config[i] & 0x02 ? "" : "!",
                        data->gpio_config[i] & 0x01 ? "OUT" : "IN",
                        i );
        }
        if( data->config3 & CFG3_GPIO16_ENABLE ) {
                printk( " %sGP%s16\n",
                        data->gpio_config[16] & 0x02 ? "" : "!",
                        data->gpio_config[16] & 0x01 ? "OUT" : "IN" );
        } else {
                /* GPIO16 is THERM */
                printk( " THERM\n" );
        }
}

void adm1026_fixup_gpio(struct i2c_client *client)
{
        struct adm1026_data *data = client->data;
        int  i ;
        int  value ;

        /* Make the changes requested. */
        /* We may need to unlock/stop monitoring or soft-reset the
         *    chip before we can make changes.  This hasn't been
         *    tested much.  FIXME
         */

        /* Make outputs */
        for( i = 0 ; i <= 16 ; ++i ) {
                if( gpio_output[i] >= 0 && gpio_output[i] <= 16 ) {
                        data->gpio_config[gpio_output[i]] |= 0x01 ;
                }
                /* if GPIO0-7 is output, it isn't a FAN tach */
                if( gpio_output[i] >= 0 && gpio_output[i] <= 7 ) {
                        data->config2 |= 1 << gpio_output[i] ;
                }
        }

        /* Input overrides output */
        for( i = 0 ; i <= 16 ; ++i ) {
                if( gpio_input[i] >= 0 && gpio_input[i] <= 16 ) {
                        data->gpio_config[gpio_input[i]] &= ~ 0x01 ;
                }
                /* if GPIO0-7 is input, it isn't a FAN tach */
                if( gpio_input[i] >= 0 && gpio_input[i] <= 7 ) {
                        data->config2 |= 1 << gpio_input[i] ;
                }
        }

        /* Inverted  */
        for( i = 0 ; i <= 16 ; ++i ) {
                if( gpio_inverted[i] >= 0 && gpio_inverted[i] <= 16 ) {
                        data->gpio_config[gpio_inverted[i]] &= ~ 0x02 ;
                }
        }

        /* Normal overrides inverted  */
        for( i = 0 ; i <= 16 ; ++i ) {
                if( gpio_normal[i] >= 0 && gpio_normal[i] <= 16 ) {
                        data->gpio_config[gpio_normal[i]] |= 0x02 ;
                }
        }

        /* Fan overrides input and output */
        for( i = 0 ; i <= 7 ; ++i ) {
                if( gpio_fan[i] >= 0 && gpio_fan[i] <= 7 ) {
                        data->config2 &= ~( 1 << gpio_fan[i] );
                }
        }

        /* Write new configs to registers */
        adm1026_write_value(client, ADM1026_REG_CONFIG2, data->config2);
        data->config3 = (data->config3 & 0x3f)
                        | ((data->gpio_config[16] & 0x03) << 6) ;
        adm1026_write_value(client, ADM1026_REG_CONFIG3, data->config3);
        for( i = 15, value = 0 ; i >= 0 ; --i ) {
                value <<= 2 ;
                value |= data->gpio_config[i] & 0x03 ;
                if( (i & 0x03) == 0 ) {
                        adm1026_write_value(client,
                                        ADM1026_REG_GPIO_CFG_0_3 + i/4,
                                        value );
                        value = 0 ;
                }
        }

        /* Print the new config */
        adm1026_print_gpio(client);
}

void adm1026_update_client(struct i2c_client *client)
{
        struct adm1026_data *data = client->data;
        int i;
        long value, alarms, gpio ;

        down(&data->update_lock);

        if (!data->valid
            || (jiffies - data->last_reading > ADM1026_DATA_INTERVAL )) {
                /* Things that change quickly */

#ifdef DEBUG
                printk("adm1026(%d): Reading sensor values\n", client->id);
#endif
                for (i = 0 ; i <= 16 ; ++i) {
                        data->in[i] =
                            adm1026_read_value(client, ADM1026_REG_IN(i));
                }

                for (i = 0 ; i <= 7 ; ++i) {
                        data->fan[i] =
                            adm1026_read_value(client, ADM1026_REG_FAN(i));
                }

                for (i = 0 ; i <= 2 ; ++i) {
                        /* NOTE: temp[] is s8 and we assume 2's complement
                         *   "conversion" in the assignment   */
                        data->temp[i] =
                            adm1026_read_value(client, ADM1026_REG_TEMP(i));
                }

                data->pwm = adm1026_read_value(client, ADM1026_REG_PWM);
                data->analog_out = adm1026_read_value(client, ADM1026_REG_DAC);

                /* GPIO16 is MSbit of alarms, move it to gpio */
                alarms  = adm1026_read_value(client, ADM1026_REG_STATUS4);
                gpio = alarms & 0x80 ? 0x0100 : 0 ;  /* GPIO16 */
                alarms &= 0x7f ;
                alarms <<= 8 ;
                alarms |= adm1026_read_value(client, ADM1026_REG_STATUS3);
                alarms <<= 8 ;
                alarms |= adm1026_read_value(client, ADM1026_REG_STATUS2);
                alarms <<= 8 ;
                alarms |= adm1026_read_value(client, ADM1026_REG_STATUS1);
                data->alarms = alarms ;

                /* Read the GPIO values */
                gpio |= adm1026_read_value(client, ADM1026_REG_GPIO_STATUS_8_15);
                gpio <<= 8 ;
                gpio |= adm1026_read_value(client, ADM1026_REG_GPIO_STATUS_0_7);
                data->gpio = gpio ;

                data->last_reading = jiffies ;
        };  /* last_reading */

        if (!data->valid
            || (jiffies - data->last_config > ADM1026_CONFIG_INTERVAL) ) {
                /* Things that don't change often */

#ifdef DEBUG
                printk("adm1026(%d): Reading config values\n", client->id);
#endif
                for (i = 0 ; i <= 16 ; ++i) {
                        data->in_min[i] =
                            adm1026_read_value(client, ADM1026_REG_IN_MIN(i));
                        data->in_max[i] =
                            adm1026_read_value(client, ADM1026_REG_IN_MAX(i));
                }

                value = adm1026_read_value(client, ADM1026_REG_FAN_DIV_0_3)
                        | (adm1026_read_value(client, ADM1026_REG_FAN_DIV_4_7) << 8);
                for (i = 0 ; i <= 7 ; ++i) {
                        data->fan_min[i] =
                            adm1026_read_value(client, ADM1026_REG_FAN_MIN(i));
                        data->fan_div[i] = DIV_FROM_REG(value & 0x03);
                        value >>= 2 ;
                }

                for (i = 0; i <= 2; ++i) {
                        /* NOTE: temp_xxx[] are s8 and we assume 2's complement
                         *   "conversion" in the assignment   */
                        data->temp_min[i] =
                            adm1026_read_value(client, ADM1026_REG_TEMP_MIN(i));
                        data->temp_max[i] =
                            adm1026_read_value(client, ADM1026_REG_TEMP_MAX(i));
                        data->temp_tmin[i] =
                            adm1026_read_value(client, ADM1026_REG_TEMP_TMIN(i));
                        data->temp_therm[i] =
                            adm1026_read_value(client, ADM1026_REG_TEMP_THERM(i));
                        data->temp_offset[i] =
                            adm1026_read_value(client, ADM1026_REG_TEMP_OFFSET(i));
                }

                /* Read the STATUS/alarm masks */
                alarms  = adm1026_read_value(client, ADM1026_REG_MASK4);
                gpio    = alarms & 0x80 ? 0x0100 : 0 ;  /* GPIO16 */
                alarms  = (alarms & 0x7f) << 8 ;
                alarms |= adm1026_read_value(client, ADM1026_REG_MASK3);
                alarms <<= 8 ;
                alarms |= adm1026_read_value(client, ADM1026_REG_MASK2);
                alarms <<= 8 ;
                alarms |= adm1026_read_value(client, ADM1026_REG_MASK1);
                data->alarm_mask = alarms ;

                /* Read the GPIO values */
                gpio |= adm1026_read_value(client, ADM1026_REG_GPIO_MASK_8_15);
                gpio <<= 8 ;
                gpio |= adm1026_read_value(client, ADM1026_REG_GPIO_MASK_0_7);
                data->gpio_mask = gpio ;

                /* Read the GPIO config */
                data->config2 = adm1026_read_value(client, ADM1026_REG_CONFIG2);
                data->config3 = adm1026_read_value(client, ADM1026_REG_CONFIG3);
                data->gpio_config[16] = (data->config3 >> 6) & 0x03 ;

                value = 0 ;
                for( i = 0 ; i <= 15 ; ++i ) {
                        if( (i & 0x03) == 0 ) {
                                value = adm1026_read_value(client,
                                            ADM1026_REG_GPIO_CFG_0_3 + i/4 );
                        }
                        data->gpio_config[i] = value & 0x03 ;
                        value >>= 2 ;
                }

                data->last_config = jiffies;
        };  /* last_config */

        /* We don't know where or even _if_ the VID might be on the GPIO
         *    pins.  But the datasheet gives an example config showing
         *    GPIO11-15 being used to monitor VID0-4, so we go with that
         *    but make the vid WRITEABLE so if it's wrong, the user can
         *    set it in /etc/sensors.conf perhaps using an expression or
         *    0 to trigger a re-read from the GPIO pins.
         */
        if( data->vid == ADM1026_INIT_VID ) {
                /* Hasn't been set yet, make a bold assumption */
                printk("adm1026(%d): Setting VID from GPIO11-15.\n",
                            client->id );
                data->vid = (data->gpio >> 11) & 0x1f ;
        }
        
        data->valid = 1;

        up(&data->update_lock);
}


/* The following functions are the call-back functions of the /proc/sys and
   sysctl files.  The appropriate function is referenced in the ctl_table
   extra1 field.

   Each function must return the magnitude (power of 10 to divide the
   data with) if it is called with operation set to SENSORS_PROC_REAL_INFO.
   It must put a maximum of *nrels elements in results reflecting the
   data of this file, and set *nrels to the number it actually put in
   it, if operation is SENSORS_PROC_REAL_READ.  Finally, it must get
   up to *nrels elements from results and write them to the chip, if
   operations is SENSORS_PROC_REAL_WRITE.
 */
void adm1026_in(struct i2c_client *client, int operation, int ctl_name,
             int *nrels_mag, long *results)
{
        struct adm1026_data *data = client->data;
        int nr = ctl_name - ADM1026_SYSCTL_IN0;

        /* We handle in0 - in15 here.  in16 (-12V) is handled below */
        if (nr < 0 || nr > 15)
                return ;  /* ERROR */

        if (operation == SENSORS_PROC_REAL_INFO)
                *nrels_mag = 3;  /* 1.000 */
        else if (operation == SENSORS_PROC_REAL_READ) {
                adm1026_update_client(client);
                results[0] = INS_FROM_REG(nr,data->in_min[nr]);
                results[1] = INS_FROM_REG(nr,data->in_max[nr]);
                results[2] = INS_FROM_REG(nr,data->in[nr]);
                *nrels_mag = 3;
        } else if (operation == SENSORS_PROC_REAL_WRITE) {
                down(&data->update_lock);
                if (*nrels_mag > 1) {
                        data->in_max[nr] = INS_TO_REG(nr,results[1]);
                        adm1026_write_value(client, ADM1026_REG_IN_MAX(nr),
                                         data->in_max[nr]);
                }
                if (*nrels_mag > 0) {
                        data->in_min[nr] = INS_TO_REG(nr,results[0]);
                        adm1026_write_value(client, ADM1026_REG_IN_MIN(nr),
                                         data->in_min[nr]);
                }
                up(&data->update_lock);
        }
}

void adm1026_in16(struct i2c_client *client, int operation, int ctl_name,
             int *nrels_mag, long *results)
{
        struct adm1026_data *data = client->data;
        int nr = ctl_name - ADM1026_SYSCTL_IN0;

        /* We handle in16 (-12V) here */
        if (nr != 16)
                return ;  /* ERROR */

        /* Apply offset and swap min/max so that min is 90% of
         *    target and max is 110% of target.
         */

        if (operation == SENSORS_PROC_REAL_INFO)
                *nrels_mag = 3;  /* 1.000 */
        else if (operation == SENSORS_PROC_REAL_READ) {
                adm1026_update_client(client);
                results[0] = INS_FROM_REG(nr,data->in_max[nr])-NEG12_OFFSET ;
                results[1] = INS_FROM_REG(nr,data->in_min[nr])-NEG12_OFFSET ;
                results[2] = INS_FROM_REG(nr,data->in[nr])-NEG12_OFFSET ;
                *nrels_mag = 3;
        } else if (operation == SENSORS_PROC_REAL_WRITE) {
                down(&data->update_lock);
                if (*nrels_mag > 1) {
                        data->in_min[nr] = INS_TO_REG(nr,results[1]+NEG12_OFFSET);
                        adm1026_write_value(client, ADM1026_REG_IN_MIN(nr),
                                         data->in_min[nr]);
                }
                if (*nrels_mag > 0) {
                        data->in_max[nr] = INS_TO_REG(nr,results[0]+NEG12_OFFSET);
                        adm1026_write_value(client, ADM1026_REG_IN_MAX(nr),
                                         data->in_max[nr]);
                }
                up(&data->update_lock);
        }
}

void adm1026_fan(struct i2c_client *client, int operation, int ctl_name,
              int *nrels_mag, long *results)
{
        struct adm1026_data *data = client->data;
        int nr = ctl_name - ADM1026_SYSCTL_FAN0 ;

        if (nr < 0 || nr > 7)
                return ;  /* ERROR */

        if (operation == SENSORS_PROC_REAL_INFO)
                *nrels_mag = 0;
        else if (operation == SENSORS_PROC_REAL_READ) {
                adm1026_update_client(client);
                results[0] = FAN_FROM_REG(data->fan_min[nr], data->fan_div[nr]);
                results[1] = FAN_FROM_REG(data->fan[nr], data->fan_div[nr]);
                *nrels_mag = 2;
        } else if (operation == SENSORS_PROC_REAL_WRITE) {
                down(&data->update_lock);
                if (*nrels_mag > 0) {
                        data->fan_min[nr] = FAN_TO_REG(results[0],
                                                        data->fan_div[nr]);
                        adm1026_write_value(client, ADM1026_REG_FAN_MIN(nr),
                                         data->fan_min[nr]);
                }
                up(&data->update_lock);
        }
}

/* Adjust fan_min to account for new fan divisor */
void adm1026_fixup_fan_min(struct i2c_client *client, int fan, int old_div)
{
        struct adm1026_data *data = client->data;
        int  new_div = data->fan_div[fan] ;
        int  new_min;

        /* 0 and 0xff are special.  Don't adjust them */
        if( data->fan_min[fan] == 0 || data->fan_min[fan] == 0xff ) {
                return ;
        }

        new_min = data->fan_min[fan] * old_div / new_div ;
        new_min = SENSORS_LIMIT(new_min, 1, 254);
        data->fan_min[fan] = new_min ;
        adm1026_write_value(client, ADM1026_REG_FAN_MIN(fan), new_min);
}

void adm1026_fan_div(struct i2c_client *client, int operation, int ctl_name,
                int *nrels_mag, long *results)
{
        struct adm1026_data *data = client->data;
        int i ;
        int value, div, old ;

        if (ctl_name != ADM1026_SYSCTL_FAN_DIV)
                return ;  /* ERROR */

        if (operation == SENSORS_PROC_REAL_INFO)
                *nrels_mag = 0;
        else if (operation == SENSORS_PROC_REAL_READ) {
                adm1026_update_client(client);
                for( i = 0 ; i <= 7 ; ++i ) {
                        results[i] = data->fan_div[i] ;
                }
                *nrels_mag = 8;
        } else if (operation == SENSORS_PROC_REAL_WRITE) {
                down(&data->update_lock);
                value = 0 ;
                for( i = 7 ; i >= 0 ; --i ) {
                        value <<= 2 ;
                        if (*nrels_mag > i) {
                                old = data->fan_div[i] ;
                                div = DIV_TO_REG(results[i]) ;
                                data->fan_div[i] = DIV_FROM_REG(div) ;
                                if( data->fan_div[i] != old ) {
                                        adm1026_fixup_fan_min(client,i,old);
                                }
                        } else {
                                div = DIV_TO_REG(data->fan_div[i]) ;
                        }
                        value |= div ;
                }
                adm1026_write_value(client, ADM1026_REG_FAN_DIV_0_3,
                        value & 0xff);
                adm1026_write_value(client, ADM1026_REG_FAN_DIV_4_7,
                        (value >> 8) & 0xff);
                up(&data->update_lock);
        }
}

void adm1026_temp(struct i2c_client *client, int operation, int ctl_name,
               int *nrels_mag, long *results)
{
        struct adm1026_data *data = client->data;
        int nr = ctl_name - ADM1026_SYSCTL_TEMP1 ;

        if (nr < 0 || nr > 2)
                return ;  /* ERROR */

        if (operation == SENSORS_PROC_REAL_INFO)
                *nrels_mag = 0;
        else if (operation == SENSORS_PROC_REAL_READ) {
                adm1026_update_client(client);
                results[0] = TEMP_FROM_REG(data->temp_min[nr]);
                results[1] = TEMP_FROM_REG(data->temp_max[nr]);
                results[2] = TEMP_FROM_REG(data->temp[nr]);
                *nrels_mag = 3;
        } else if (operation == SENSORS_PROC_REAL_WRITE) {
                down(&data->update_lock);
                if (*nrels_mag > 1) {
                        data->temp_max[nr] = TEMP_TO_REG(results[1]);
                        adm1026_write_value(client, ADM1026_REG_TEMP_MAX(nr),
                                         data->temp_max[nr]);
                }
                if (*nrels_mag > 0) {
                        data->temp_min[nr] = TEMP_TO_REG(results[0]);
                        adm1026_write_value(client, ADM1026_REG_TEMP_MIN(nr),
                                         data->temp_min[nr]);
                }
                up(&data->update_lock);
        }
}

void adm1026_temp_offset(struct i2c_client *client, int operation, int ctl_name,
                int *nrels_mag, long *results)
{
        struct adm1026_data *data = client->data;
        int nr = ctl_name - ADM1026_SYSCTL_TEMP_OFFSET1 ;

        if (nr < 0 || nr > 2)
                return ;  /* ERROR */

        if (operation == SENSORS_PROC_REAL_INFO)
                *nrels_mag = 0;
        else if (operation == SENSORS_PROC_REAL_READ) {
                adm1026_update_client(client);
                results[0] = TEMP_FROM_REG(data->temp_offset[nr]);
                *nrels_mag = 1;
        } else if (operation == SENSORS_PROC_REAL_WRITE) {
                down(&data->update_lock);
                if (*nrels_mag > 0) {
                        data->temp_offset[nr] = TEMP_TO_REG(results[0]);
                        adm1026_write_value(client, ADM1026_REG_TEMP_OFFSET(nr),
                            data->temp_offset[nr]);
                }
                up(&data->update_lock);
        }
}

void adm1026_temp_tmin(struct i2c_client *client, int operation, int ctl_name,
                int *nrels_mag, long *results)
{
        struct adm1026_data *data = client->data;
        int nr = ctl_name - ADM1026_SYSCTL_TEMP_TMIN1 ;

        if (nr < 0 || nr > 2)
                return ;  /* ERROR */

        if (operation == SENSORS_PROC_REAL_INFO)
                *nrels_mag = 0;
        else if (operation == SENSORS_PROC_REAL_READ) {
                adm1026_update_client(client);
                results[0] = TEMP_FROM_REG(data->temp_tmin[nr]);
                *nrels_mag = 1;
        } else if (operation == SENSORS_PROC_REAL_WRITE) {
                down(&data->update_lock);
                if (*nrels_mag > 0) {
                        data->temp_tmin[nr] = TEMP_TO_REG(results[0]);
                        adm1026_write_value(client, ADM1026_REG_TEMP_TMIN(nr),
                            data->temp_tmin[nr]);
                }
                up(&data->update_lock);
        }
}

void adm1026_temp_therm(struct i2c_client *client, int operation, int ctl_name,
                int *nrels_mag, long *results)
{
        struct adm1026_data *data = client->data;
        int nr = ctl_name - ADM1026_SYSCTL_TEMP_THERM1 ;

        if (nr < 0 || nr > 2)
                return ;  /* ERROR */

        if (operation == SENSORS_PROC_REAL_INFO)
                *nrels_mag = 0;
        else if (operation == SENSORS_PROC_REAL_READ) {
                adm1026_update_client(client);
                results[0] = TEMP_FROM_REG(data->temp_therm[nr]);
                *nrels_mag = 1;
        } else if (operation == SENSORS_PROC_REAL_WRITE) {
                down(&data->update_lock);
                if (*nrels_mag > 0) {
                        data->temp_therm[nr] = TEMP_TO_REG(results[0]);
                        adm1026_write_value(client, ADM1026_REG_TEMP_THERM(nr),
                            data->temp_therm[nr]);
                }
                up(&data->update_lock);
        }
}

void adm1026_pwm(struct i2c_client *client, int operation, int ctl_name,
              int *nrels_mag, long *results)
{
        struct adm1026_data *data = client->data;

        if (ctl_name != ADM1026_SYSCTL_PWM)
                return ;  /* ERROR */

        if (operation == SENSORS_PROC_REAL_INFO)
                *nrels_mag = 0;
        else if (operation == SENSORS_PROC_REAL_READ) {
                adm1026_update_client(client);
                results[0] = PWM_FROM_REG(data->pwm);
                results[1] = 1 ;  /* Always enabled */
                *nrels_mag = 2;
        } else if (operation == SENSORS_PROC_REAL_WRITE) {
                down(&data->update_lock);
                /* PWM enable is read-only */
                if (*nrels_mag > 0) {
                        data->pwm = PWM_TO_REG(results[0]);
                        adm1026_write_value(client, ADM1026_REG_PWM,
                                         data->pwm);
                }
                up(&data->update_lock);
        }
}

void adm1026_analog_out(struct i2c_client *client, int operation, int ctl_name,
              int *nrels_mag, long *results)
{
        struct adm1026_data *data = client->data;

        if (ctl_name != ADM1026_SYSCTL_ANALOG_OUT)
                return ;  /* ERROR */

        if (operation == SENSORS_PROC_REAL_INFO)
                *nrels_mag = 0;  /* 0 - 255 */
        else if (operation == SENSORS_PROC_REAL_READ) {
                adm1026_update_client(client);
                results[0] = DAC_FROM_REG(data->analog_out);
                *nrels_mag = 1;
        } else if (operation == SENSORS_PROC_REAL_WRITE) {
                down(&data->update_lock);
                if (*nrels_mag > 0) {
                        data->analog_out = DAC_TO_REG(results[0]);
                        adm1026_write_value(client, ADM1026_REG_DAC,
                                         data->analog_out);
                }
                up(&data->update_lock);
        }
}

void adm1026_afc(struct i2c_client *client, int operation, int ctl_name,
              int *nrels_mag, long *results)
{
        struct adm1026_data *data = client->data;

        if (ctl_name != ADM1026_SYSCTL_AFC)
                return ;  /* ERROR */

        /* PWM auto fan control, DAC auto fan control */

        if (operation == SENSORS_PROC_REAL_INFO)
                *nrels_mag = 0;
        else if (operation == SENSORS_PROC_REAL_READ) {
                adm1026_update_client(client);
                results[0] = (data->config1 & CFG1_PWM_AFC) != 0 ;
                results[1] = (data->config1 & CFG1_DAC_AFC) != 0 ;
                *nrels_mag = 2;
        } else if (operation == SENSORS_PROC_REAL_WRITE) {
                down(&data->update_lock);
                if (*nrels_mag > 1) {
                        data->config1 = (data->config1 & ~CFG1_DAC_AFC)
                                | (results[1] ? CFG1_DAC_AFC : 0) ;
                }
                if (*nrels_mag > 0) {
                        data->config1 = (data->config1 & ~CFG1_PWM_AFC)
                                | (results[0] ? CFG1_PWM_AFC : 0) ;
                        adm1026_write_value(client, ADM1026_REG_CONFIG1,
                                         data->config1);
                }
                up(&data->update_lock);
        }
}

void adm1026_vid(struct i2c_client *client, int operation, int ctl_name,
              int *nrels_mag, long *results)
{
        struct adm1026_data *data = client->data;

        if( ctl_name != ADM1026_SYSCTL_VID )
                return ;  /* ERROR */

        if (operation == SENSORS_PROC_REAL_INFO)
                *nrels_mag = 3;
        else if (operation == SENSORS_PROC_REAL_READ) {
                adm1026_update_client(client);
                results[0] = VID_FROM_REG((data->vid)&0x3f,data->vrm);
                *nrels_mag = 1;
        } else if (operation == SENSORS_PROC_REAL_WRITE) {
                down(&data->update_lock);
                /* Hmmm... There isn't a VID_TO_REG mapping */
                if (*nrels_mag > 0) {
                        if( results[0] >= 0 ) {
                                data->vid = results[0] & 0x3f ;
                        } else {
                                data->vid = ADM1026_INIT_VID ;
                        }
                }
                up(&data->update_lock);
        }

}

void adm1026_vrm(struct i2c_client *client, int operation, int ctl_name,
              int *nrels_mag, long *results)
{
        struct adm1026_data *data = client->data;

        if( ctl_name != ADM1026_SYSCTL_VRM )
                return ;  /* ERROR */

        if (operation == SENSORS_PROC_REAL_INFO)
                *nrels_mag = 1;
        else if (operation == SENSORS_PROC_REAL_READ) {
                results[0] = data->vrm ;
                *nrels_mag = 1;
        } else if (operation == SENSORS_PROC_REAL_WRITE) {
                if (*nrels_mag > 0) {
                        data->vrm = results[0] ;
                }
        }
}

void adm1026_alarms(struct i2c_client *client, int operation, int ctl_name,
                int *nrels_mag, long *results)
{
        struct adm1026_data *data = client->data;

        if( ctl_name != ADM1026_SYSCTL_ALARMS )
                return ;  /* ERROR */

        if (operation == SENSORS_PROC_REAL_INFO)
                *nrels_mag = 0;
        else if (operation == SENSORS_PROC_REAL_READ) {
                adm1026_update_client(client);
                results[0] = data->alarms ;
                *nrels_mag = 1;
        }
        /* FIXME: Perhaps we should implement a write function
         *   to clear an alarm?
         */
}

void adm1026_alarm_mask(struct i2c_client *client, int operation,
                int ctl_name, int *nrels_mag, long *results)
{
        struct adm1026_data *data = client->data;
        unsigned long mask ;

        if( ctl_name != ADM1026_SYSCTL_ALARM_MASK )
                return ;  /* ERROR */

        if (operation == SENSORS_PROC_REAL_INFO)
                *nrels_mag = 0;
        else if (operation == SENSORS_PROC_REAL_READ) {
                adm1026_update_client(client);
                results[0] = data->alarm_mask ;
                *nrels_mag = 1;
        } else if (operation == SENSORS_PROC_REAL_WRITE) {
                down(&data->update_lock);
                if (*nrels_mag > 0) {
                        data->alarm_mask = results[0] & 0x7fffffff ;
                        mask = data->alarm_mask
                                | (data->gpio_mask & 0x10000 ? 0x80000000 : 0) ;
                        adm1026_write_value(client, ADM1026_REG_MASK1,
                                        mask & 0xff);
                        mask >>= 8 ;
                        adm1026_write_value(client, ADM1026_REG_MASK2,
                                        mask & 0xff);
                        mask >>= 8 ;
                        adm1026_write_value(client, ADM1026_REG_MASK3,
                                        mask & 0xff);
                        mask >>= 8 ;
                        adm1026_write_value(client, ADM1026_REG_MASK4,
                                        mask & 0xff);
                }
                up(&data->update_lock);
        }
}

void adm1026_gpio(struct i2c_client *client, int operation, int ctl_name,
                int *nrels_mag, long *results)
{
        struct adm1026_data *data = client->data;
        long gpio ;

        if( ctl_name != ADM1026_SYSCTL_GPIO )
                return ;  /* ERROR */

        if (operation == SENSORS_PROC_REAL_INFO)
                *nrels_mag = 0;
        else if (operation == SENSORS_PROC_REAL_READ) {
                adm1026_update_client(client);
                results[0] = data->gpio ;
                *nrels_mag = 1;
        } else if (operation == SENSORS_PROC_REAL_WRITE) {
                down(&data->update_lock);
                if (*nrels_mag > 0) {
                        data->gpio = results[0] & 0x1ffff ;
                        gpio = data->gpio ;
                        adm1026_write_value(client,
                                ADM1026_REG_GPIO_STATUS_0_7,
                                gpio & 0xff );
                        gpio >>= 8 ;
                        adm1026_write_value(client,
                                ADM1026_REG_GPIO_STATUS_8_15,
                                gpio & 0xff );
                        gpio = ((gpio >> 1) & 0x80)
                                | (data->alarms >> 24 & 0x7f);
                        adm1026_write_value(client,
                                ADM1026_REG_STATUS4,
                                gpio & 0xff );
                }
                up(&data->update_lock);
        }
}

void adm1026_gpio_mask(struct i2c_client *client, int operation,
                int ctl_name, int *nrels_mag, long *results)
{
        struct adm1026_data *data = client->data;
        long mask ;

        if( ctl_name != ADM1026_SYSCTL_GPIO_MASK )
                return ;  /* ERROR */

        if (operation == SENSORS_PROC_REAL_INFO)
                *nrels_mag = 0;
        else if (operation == SENSORS_PROC_REAL_READ) {
                adm1026_update_client(client);
                results[0] = data->gpio_mask ;
                *nrels_mag = 1;
        } else if (operation == SENSORS_PROC_REAL_WRITE) {
                down(&data->update_lock);
                if (*nrels_mag > 0) {
                        data->gpio_mask = results[0] & 0x1ffff ;
                        mask = data->gpio_mask ;
                        adm1026_write_value(client, ADM1026_REG_GPIO_MASK_0_7,
                                        mask & 0xff);
                        mask >>= 8 ;
                        adm1026_write_value(client, ADM1026_REG_GPIO_MASK_8_15,
                                        mask & 0xff);
                        mask = ((mask >> 1) & 0x80)
                                | (data->alarm_mask >> 24 & 0x7f);
                        adm1026_write_value(client, ADM1026_REG_MASK1,
                                        mask & 0xff);
                }
                up(&data->update_lock);
        }
}

static int __init sm_adm1026_init(void)
{
        printk("adm1026: Version %s (%s)\n", LM_VERSION, LM_DATE);
        printk("adm1026: See http://www.penguincomputing.com/lm_sensors for more info.\n" );
        return i2c_add_driver(&adm1026_driver);
}

static void __exit sm_adm1026_exit(void)
{
        i2c_del_driver(&adm1026_driver);
}

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Philip Pokorny <ppokorny@penguincomputing.com");
MODULE_DESCRIPTION("ADM1026 driver");

module_init(sm_adm1026_init);
module_exit(sm_adm1026_exit);