linux/drivers/hwmon/lm85.c
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   1/*
   2 * lm85.c - Part of lm_sensors, Linux kernel modules for hardware
   3 *          monitoring
   4 * Copyright (c) 1998, 1999  Frodo Looijaard <frodol@dds.nl>
   5 * Copyright (c) 2002, 2003  Philip Pokorny <ppokorny@penguincomputing.com>
   6 * Copyright (c) 2003        Margit Schubert-While <margitsw@t-online.de>
   7 * Copyright (c) 2004        Justin Thiessen <jthiessen@penguincomputing.com>
   8 * Copyright (C) 2007--2009  Jean Delvare <khali@linux-fr.org>
   9 *
  10 * Chip details at            <http://www.national.com/ds/LM/LM85.pdf>
  11 *
  12 * This program is free software; you can redistribute it and/or modify
  13 * it under the terms of the GNU General Public License as published by
  14 * the Free Software Foundation; either version 2 of the License, or
  15 * (at your option) any later version.
  16 *
  17 * This program is distributed in the hope that it will be useful,
  18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 * GNU General Public License for more details.
  21 *
  22 * You should have received a copy of the GNU General Public License
  23 * along with this program; if not, write to the Free Software
  24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  25 */
  26
  27#include <linux/module.h>
  28#include <linux/init.h>
  29#include <linux/slab.h>
  30#include <linux/jiffies.h>
  31#include <linux/i2c.h>
  32#include <linux/hwmon.h>
  33#include <linux/hwmon-vid.h>
  34#include <linux/hwmon-sysfs.h>
  35#include <linux/err.h>
  36#include <linux/mutex.h>
  37
  38/* Addresses to scan */
  39static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
  40
  41enum chips {
  42        any_chip, lm85b, lm85c,
  43        adm1027, adt7463, adt7468,
  44        emc6d100, emc6d102, emc6d103, emc6d103s
  45};
  46
  47/* The LM85 registers */
  48
  49#define LM85_REG_IN(nr)                 (0x20 + (nr))
  50#define LM85_REG_IN_MIN(nr)             (0x44 + (nr) * 2)
  51#define LM85_REG_IN_MAX(nr)             (0x45 + (nr) * 2)
  52
  53#define LM85_REG_TEMP(nr)               (0x25 + (nr))
  54#define LM85_REG_TEMP_MIN(nr)           (0x4e + (nr) * 2)
  55#define LM85_REG_TEMP_MAX(nr)           (0x4f + (nr) * 2)
  56
  57/* Fan speeds are LSB, MSB (2 bytes) */
  58#define LM85_REG_FAN(nr)                (0x28 + (nr) * 2)
  59#define LM85_REG_FAN_MIN(nr)            (0x54 + (nr) * 2)
  60
  61#define LM85_REG_PWM(nr)                (0x30 + (nr))
  62
  63#define LM85_REG_COMPANY                0x3e
  64#define LM85_REG_VERSTEP                0x3f
  65
  66#define ADT7468_REG_CFG5                0x7c
  67#define ADT7468_OFF64                   (1 << 0)
  68#define ADT7468_HFPWM                   (1 << 1)
  69#define IS_ADT7468_OFF64(data)          \
  70        ((data)->type == adt7468 && !((data)->cfg5 & ADT7468_OFF64))
  71#define IS_ADT7468_HFPWM(data)          \
  72        ((data)->type == adt7468 && !((data)->cfg5 & ADT7468_HFPWM))
  73
  74/* These are the recognized values for the above regs */
  75#define LM85_COMPANY_NATIONAL           0x01
  76#define LM85_COMPANY_ANALOG_DEV         0x41
  77#define LM85_COMPANY_SMSC               0x5c
  78#define LM85_VERSTEP_VMASK              0xf0
  79#define LM85_VERSTEP_GENERIC            0x60
  80#define LM85_VERSTEP_GENERIC2           0x70
  81#define LM85_VERSTEP_LM85C              0x60
  82#define LM85_VERSTEP_LM85B              0x62
  83#define LM85_VERSTEP_LM96000_1          0x68
  84#define LM85_VERSTEP_LM96000_2          0x69
  85#define LM85_VERSTEP_ADM1027            0x60
  86#define LM85_VERSTEP_ADT7463            0x62
  87#define LM85_VERSTEP_ADT7463C           0x6A
  88#define LM85_VERSTEP_ADT7468_1          0x71
  89#define LM85_VERSTEP_ADT7468_2          0x72
  90#define LM85_VERSTEP_EMC6D100_A0        0x60
  91#define LM85_VERSTEP_EMC6D100_A1        0x61
  92#define LM85_VERSTEP_EMC6D102           0x65
  93#define LM85_VERSTEP_EMC6D103_A0        0x68
  94#define LM85_VERSTEP_EMC6D103_A1        0x69
  95#define LM85_VERSTEP_EMC6D103S          0x6A    /* Also known as EMC6D103:A2 */
  96
  97#define LM85_REG_CONFIG                 0x40
  98
  99#define LM85_REG_ALARM1                 0x41
 100#define LM85_REG_ALARM2                 0x42
 101
 102#define LM85_REG_VID                    0x43
 103
 104/* Automated FAN control */
 105#define LM85_REG_AFAN_CONFIG(nr)        (0x5c + (nr))
 106#define LM85_REG_AFAN_RANGE(nr)         (0x5f + (nr))
 107#define LM85_REG_AFAN_SPIKE1            0x62
 108#define LM85_REG_AFAN_MINPWM(nr)        (0x64 + (nr))
 109#define LM85_REG_AFAN_LIMIT(nr)         (0x67 + (nr))
 110#define LM85_REG_AFAN_CRITICAL(nr)      (0x6a + (nr))
 111#define LM85_REG_AFAN_HYST1             0x6d
 112#define LM85_REG_AFAN_HYST2             0x6e
 113
 114#define ADM1027_REG_EXTEND_ADC1         0x76
 115#define ADM1027_REG_EXTEND_ADC2         0x77
 116
 117#define EMC6D100_REG_ALARM3             0x7d
 118/* IN5, IN6 and IN7 */
 119#define EMC6D100_REG_IN(nr)             (0x70 + ((nr) - 5))
 120#define EMC6D100_REG_IN_MIN(nr)         (0x73 + ((nr) - 5) * 2)
 121#define EMC6D100_REG_IN_MAX(nr)         (0x74 + ((nr) - 5) * 2)
 122#define EMC6D102_REG_EXTEND_ADC1        0x85
 123#define EMC6D102_REG_EXTEND_ADC2        0x86
 124#define EMC6D102_REG_EXTEND_ADC3        0x87
 125#define EMC6D102_REG_EXTEND_ADC4        0x88
 126
 127
 128/*
 129 * Conversions. Rounding and limit checking is only done on the TO_REG
 130 * variants. Note that you should be a bit careful with which arguments
 131 * these macros are called: arguments may be evaluated more than once.
 132 */
 133
 134/* IN are scaled according to built-in resistors */
 135static const int lm85_scaling[] = {  /* .001 Volts */
 136        2500, 2250, 3300, 5000, 12000,
 137        3300, 1500, 1800 /*EMC6D100*/
 138};
 139#define SCALE(val, from, to)    (((val) * (to) + ((from) / 2)) / (from))
 140
 141#define INS_TO_REG(n, val)      \
 142                clamp_val(SCALE(val, lm85_scaling[n], 192), 0, 255)
 143
 144#define INSEXT_FROM_REG(n, val, ext)    \
 145                SCALE(((val) << 4) + (ext), 192 << 4, lm85_scaling[n])
 146
 147#define INS_FROM_REG(n, val)    SCALE((val), 192, lm85_scaling[n])
 148
 149/* FAN speed is measured using 90kHz clock */
 150static inline u16 FAN_TO_REG(unsigned long val)
 151{
 152        if (!val)
 153                return 0xffff;
 154        return clamp_val(5400000 / val, 1, 0xfffe);
 155}
 156#define FAN_FROM_REG(val)       ((val) == 0 ? -1 : (val) == 0xffff ? 0 : \
 157                                 5400000 / (val))
 158
 159/* Temperature is reported in .001 degC increments */
 160#define TEMP_TO_REG(val)        \
 161                clamp_val(SCALE(val, 1000, 1), -127, 127)
 162#define TEMPEXT_FROM_REG(val, ext)      \
 163                SCALE(((val) << 4) + (ext), 16, 1000)
 164#define TEMP_FROM_REG(val)      ((val) * 1000)
 165
 166#define PWM_TO_REG(val)                 clamp_val(val, 0, 255)
 167#define PWM_FROM_REG(val)               (val)
 168
 169
 170/*
 171 * ZONEs have the following parameters:
 172 *    Limit (low) temp,           1. degC
 173 *    Hysteresis (below limit),   1. degC (0-15)
 174 *    Range of speed control,     .1 degC (2-80)
 175 *    Critical (high) temp,       1. degC
 176 *
 177 * FAN PWMs have the following parameters:
 178 *    Reference Zone,                 1, 2, 3, etc.
 179 *    Spinup time,                    .05 sec
 180 *    PWM value at limit/low temp,    1 count
 181 *    PWM Frequency,                  1. Hz
 182 *    PWM is Min or OFF below limit,  flag
 183 *    Invert PWM output,              flag
 184 *
 185 * Some chips filter the temp, others the fan.
 186 *    Filter constant (or disabled)   .1 seconds
 187 */
 188
 189/* These are the zone temperature range encodings in .001 degree C */
 190static const int lm85_range_map[] = {
 191        2000, 2500, 3300, 4000, 5000, 6600, 8000, 10000,
 192        13300, 16000, 20000, 26600, 32000, 40000, 53300, 80000
 193};
 194
 195static int RANGE_TO_REG(int range)
 196{
 197        int i;
 198
 199        /* Find the closest match */
 200        for (i = 0; i < 15; ++i) {
 201                if (range <= (lm85_range_map[i] + lm85_range_map[i + 1]) / 2)
 202                        break;
 203        }
 204
 205        return i;
 206}
 207#define RANGE_FROM_REG(val)     lm85_range_map[(val) & 0x0f]
 208
 209/* These are the PWM frequency encodings */
 210static const int lm85_freq_map[8] = { /* 1 Hz */
 211        10, 15, 23, 30, 38, 47, 61, 94
 212};
 213static const int adm1027_freq_map[8] = { /* 1 Hz */
 214        11, 15, 22, 29, 35, 44, 59, 88
 215};
 216
 217static int FREQ_TO_REG(const int *map, int freq)
 218{
 219        int i;
 220
 221        /* Find the closest match */
 222        for (i = 0; i < 7; ++i)
 223                if (freq <= (map[i] + map[i + 1]) / 2)
 224                        break;
 225        return i;
 226}
 227
 228static int FREQ_FROM_REG(const int *map, u8 reg)
 229{
 230        return map[reg & 0x07];
 231}
 232
 233/*
 234 * Since we can't use strings, I'm abusing these numbers
 235 *   to stand in for the following meanings:
 236 *      1 -- PWM responds to Zone 1
 237 *      2 -- PWM responds to Zone 2
 238 *      3 -- PWM responds to Zone 3
 239 *     23 -- PWM responds to the higher temp of Zone 2 or 3
 240 *    123 -- PWM responds to highest of Zone 1, 2, or 3
 241 *      0 -- PWM is always at 0% (ie, off)
 242 *     -1 -- PWM is always at 100%
 243 *     -2 -- PWM responds to manual control
 244 */
 245
 246static const int lm85_zone_map[] = { 1, 2, 3, -1, 0, 23, 123, -2 };
 247#define ZONE_FROM_REG(val)      lm85_zone_map[(val) >> 5]
 248
 249static int ZONE_TO_REG(int zone)
 250{
 251        int i;
 252
 253        for (i = 0; i <= 7; ++i)
 254                if (zone == lm85_zone_map[i])
 255                        break;
 256        if (i > 7)   /* Not found. */
 257                i = 3;  /* Always 100% */
 258        return i << 5;
 259}
 260
 261#define HYST_TO_REG(val)        clamp_val(((val) + 500) / 1000, 0, 15)
 262#define HYST_FROM_REG(val)      ((val) * 1000)
 263
 264/*
 265 * Chip sampling rates
 266 *
 267 * Some sensors are not updated more frequently than once per second
 268 *    so it doesn't make sense to read them more often than that.
 269 *    We cache the results and return the saved data if the driver
 270 *    is called again before a second has elapsed.
 271 *
 272 * Also, there is significant configuration data for this chip
 273 *    given the automatic PWM fan control that is possible.  There
 274 *    are about 47 bytes of config data to only 22 bytes of actual
 275 *    readings.  So, we keep the config data up to date in the cache
 276 *    when it is written and only sample it once every 1 *minute*
 277 */
 278#define LM85_DATA_INTERVAL  (HZ + HZ / 2)
 279#define LM85_CONFIG_INTERVAL  (1 * 60 * HZ)
 280
 281/*
 282 * LM85 can automatically adjust fan speeds based on temperature
 283 * This structure encapsulates an entire Zone config.  There are
 284 * three zones (one for each temperature input) on the lm85
 285 */
 286struct lm85_zone {
 287        s8 limit;       /* Low temp limit */
 288        u8 hyst;        /* Low limit hysteresis. (0-15) */
 289        u8 range;       /* Temp range, encoded */
 290        s8 critical;    /* "All fans ON" temp limit */
 291        u8 max_desired; /*
 292                         * Actual "max" temperature specified.  Preserved
 293                         * to prevent "drift" as other autofan control
 294                         * values change.
 295                         */
 296};
 297
 298struct lm85_autofan {
 299        u8 config;      /* Register value */
 300        u8 min_pwm;     /* Minimum PWM value, encoded */
 301        u8 min_off;     /* Min PWM or OFF below "limit", flag */
 302};
 303
 304/*
 305 * For each registered chip, we need to keep some data in memory.
 306 * The structure is dynamically allocated.
 307 */
 308struct lm85_data {
 309        struct device *hwmon_dev;
 310        const int *freq_map;
 311        enum chips type;
 312
 313        bool has_vid5;  /* true if VID5 is configured for ADT7463 or ADT7468 */
 314
 315        struct mutex update_lock;
 316        int valid;              /* !=0 if following fields are valid */
 317        unsigned long last_reading;     /* In jiffies */
 318        unsigned long last_config;      /* In jiffies */
 319
 320        u8 in[8];               /* Register value */
 321        u8 in_max[8];           /* Register value */
 322        u8 in_min[8];           /* Register value */
 323        s8 temp[3];             /* Register value */
 324        s8 temp_min[3];         /* Register value */
 325        s8 temp_max[3];         /* Register value */
 326        u16 fan[4];             /* Register value */
 327        u16 fan_min[4];         /* Register value */
 328        u8 pwm[3];              /* Register value */
 329        u8 pwm_freq[3];         /* Register encoding */
 330        u8 temp_ext[3];         /* Decoded values */
 331        u8 in_ext[8];           /* Decoded values */
 332        u8 vid;                 /* Register value */
 333        u8 vrm;                 /* VRM version */
 334        u32 alarms;             /* Register encoding, combined */
 335        u8 cfg5;                /* Config Register 5 on ADT7468 */
 336        struct lm85_autofan autofan[3];
 337        struct lm85_zone zone[3];
 338};
 339
 340static int lm85_detect(struct i2c_client *client, struct i2c_board_info *info);
 341static int lm85_probe(struct i2c_client *client,
 342                      const struct i2c_device_id *id);
 343static int lm85_remove(struct i2c_client *client);
 344
 345static int lm85_read_value(struct i2c_client *client, u8 reg);
 346static void lm85_write_value(struct i2c_client *client, u8 reg, int value);
 347static struct lm85_data *lm85_update_device(struct device *dev);
 348
 349
 350static const struct i2c_device_id lm85_id[] = {
 351        { "adm1027", adm1027 },
 352        { "adt7463", adt7463 },
 353        { "adt7468", adt7468 },
 354        { "lm85", any_chip },
 355        { "lm85b", lm85b },
 356        { "lm85c", lm85c },
 357        { "emc6d100", emc6d100 },
 358        { "emc6d101", emc6d100 },
 359        { "emc6d102", emc6d102 },
 360        { "emc6d103", emc6d103 },
 361        { "emc6d103s", emc6d103s },
 362        { }
 363};
 364MODULE_DEVICE_TABLE(i2c, lm85_id);
 365
 366static struct i2c_driver lm85_driver = {
 367        .class          = I2C_CLASS_HWMON,
 368        .driver = {
 369                .name   = "lm85",
 370        },
 371        .probe          = lm85_probe,
 372        .remove         = lm85_remove,
 373        .id_table       = lm85_id,
 374        .detect         = lm85_detect,
 375        .address_list   = normal_i2c,
 376};
 377
 378
 379/* 4 Fans */
 380static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
 381                char *buf)
 382{
 383        int nr = to_sensor_dev_attr(attr)->index;
 384        struct lm85_data *data = lm85_update_device(dev);
 385        return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr]));
 386}
 387
 388static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
 389                char *buf)
 390{
 391        int nr = to_sensor_dev_attr(attr)->index;
 392        struct lm85_data *data = lm85_update_device(dev);
 393        return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr]));
 394}
 395
 396static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
 397                const char *buf, size_t count)
 398{
 399        int nr = to_sensor_dev_attr(attr)->index;
 400        struct i2c_client *client = to_i2c_client(dev);
 401        struct lm85_data *data = i2c_get_clientdata(client);
 402        unsigned long val;
 403        int err;
 404
 405        err = kstrtoul(buf, 10, &val);
 406        if (err)
 407                return err;
 408
 409        mutex_lock(&data->update_lock);
 410        data->fan_min[nr] = FAN_TO_REG(val);
 411        lm85_write_value(client, LM85_REG_FAN_MIN(nr), data->fan_min[nr]);
 412        mutex_unlock(&data->update_lock);
 413        return count;
 414}
 415
 416#define show_fan_offset(offset)                                         \
 417static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO,                 \
 418                show_fan, NULL, offset - 1);                            \
 419static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR,         \
 420                show_fan_min, set_fan_min, offset - 1)
 421
 422show_fan_offset(1);
 423show_fan_offset(2);
 424show_fan_offset(3);
 425show_fan_offset(4);
 426
 427/* vid, vrm, alarms */
 428
 429static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr,
 430                char *buf)
 431{
 432        struct lm85_data *data = lm85_update_device(dev);
 433        int vid;
 434
 435        if (data->has_vid5) {
 436                /* 6-pin VID (VRM 10) */
 437                vid = vid_from_reg(data->vid & 0x3f, data->vrm);
 438        } else {
 439                /* 5-pin VID (VRM 9) */
 440                vid = vid_from_reg(data->vid & 0x1f, data->vrm);
 441        }
 442
 443        return sprintf(buf, "%d\n", vid);
 444}
 445
 446static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
 447
 448static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr,
 449                char *buf)
 450{
 451        struct lm85_data *data = dev_get_drvdata(dev);
 452        return sprintf(buf, "%ld\n", (long) data->vrm);
 453}
 454
 455static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr,
 456                const char *buf, size_t count)
 457{
 458        struct lm85_data *data = dev_get_drvdata(dev);
 459        unsigned long val;
 460        int err;
 461
 462        err = kstrtoul(buf, 10, &val);
 463        if (err)
 464                return err;
 465
 466        data->vrm = val;
 467        return count;
 468}
 469
 470static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
 471
 472static ssize_t show_alarms_reg(struct device *dev, struct device_attribute
 473                *attr, char *buf)
 474{
 475        struct lm85_data *data = lm85_update_device(dev);
 476        return sprintf(buf, "%u\n", data->alarms);
 477}
 478
 479static DEVICE_ATTR(alarms, S_IRUGO, show_alarms_reg, NULL);
 480
 481static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
 482                char *buf)
 483{
 484        int nr = to_sensor_dev_attr(attr)->index;
 485        struct lm85_data *data = lm85_update_device(dev);
 486        return sprintf(buf, "%u\n", (data->alarms >> nr) & 1);
 487}
 488
 489static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
 490static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
 491static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
 492static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
 493static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
 494static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 18);
 495static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 16);
 496static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 17);
 497static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
 498static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_alarm, NULL, 14);
 499static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5);
 500static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 6);
 501static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 15);
 502static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 10);
 503static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 11);
 504static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 12);
 505static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 13);
 506
 507/* pwm */
 508
 509static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
 510                char *buf)
 511{
 512        int nr = to_sensor_dev_attr(attr)->index;
 513        struct lm85_data *data = lm85_update_device(dev);
 514        return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm[nr]));
 515}
 516
 517static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
 518                const char *buf, size_t count)
 519{
 520        int nr = to_sensor_dev_attr(attr)->index;
 521        struct i2c_client *client = to_i2c_client(dev);
 522        struct lm85_data *data = i2c_get_clientdata(client);
 523        unsigned long val;
 524        int err;
 525
 526        err = kstrtoul(buf, 10, &val);
 527        if (err)
 528                return err;
 529
 530        mutex_lock(&data->update_lock);
 531        data->pwm[nr] = PWM_TO_REG(val);
 532        lm85_write_value(client, LM85_REG_PWM(nr), data->pwm[nr]);
 533        mutex_unlock(&data->update_lock);
 534        return count;
 535}
 536
 537static ssize_t show_pwm_enable(struct device *dev, struct device_attribute
 538                *attr, char *buf)
 539{
 540        int nr = to_sensor_dev_attr(attr)->index;
 541        struct lm85_data *data = lm85_update_device(dev);
 542        int pwm_zone, enable;
 543
 544        pwm_zone = ZONE_FROM_REG(data->autofan[nr].config);
 545        switch (pwm_zone) {
 546        case -1:        /* PWM is always at 100% */
 547                enable = 0;
 548                break;
 549        case 0:         /* PWM is always at 0% */
 550        case -2:        /* PWM responds to manual control */
 551                enable = 1;
 552                break;
 553        default:        /* PWM in automatic mode */
 554                enable = 2;
 555        }
 556        return sprintf(buf, "%d\n", enable);
 557}
 558
 559static ssize_t set_pwm_enable(struct device *dev, struct device_attribute
 560                *attr, const char *buf, size_t count)
 561{
 562        int nr = to_sensor_dev_attr(attr)->index;
 563        struct i2c_client *client = to_i2c_client(dev);
 564        struct lm85_data *data = i2c_get_clientdata(client);
 565        u8 config;
 566        unsigned long val;
 567        int err;
 568
 569        err = kstrtoul(buf, 10, &val);
 570        if (err)
 571                return err;
 572
 573        switch (val) {
 574        case 0:
 575                config = 3;
 576                break;
 577        case 1:
 578                config = 7;
 579                break;
 580        case 2:
 581                /*
 582                 * Here we have to choose arbitrarily one of the 5 possible
 583                 * configurations; I go for the safest
 584                 */
 585                config = 6;
 586                break;
 587        default:
 588                return -EINVAL;
 589        }
 590
 591        mutex_lock(&data->update_lock);
 592        data->autofan[nr].config = lm85_read_value(client,
 593                LM85_REG_AFAN_CONFIG(nr));
 594        data->autofan[nr].config = (data->autofan[nr].config & ~0xe0)
 595                | (config << 5);
 596        lm85_write_value(client, LM85_REG_AFAN_CONFIG(nr),
 597                data->autofan[nr].config);
 598        mutex_unlock(&data->update_lock);
 599        return count;
 600}
 601
 602static ssize_t show_pwm_freq(struct device *dev,
 603                struct device_attribute *attr, char *buf)
 604{
 605        int nr = to_sensor_dev_attr(attr)->index;
 606        struct lm85_data *data = lm85_update_device(dev);
 607        int freq;
 608
 609        if (IS_ADT7468_HFPWM(data))
 610                freq = 22500;
 611        else
 612                freq = FREQ_FROM_REG(data->freq_map, data->pwm_freq[nr]);
 613
 614        return sprintf(buf, "%d\n", freq);
 615}
 616
 617static ssize_t set_pwm_freq(struct device *dev,
 618                struct device_attribute *attr, const char *buf, size_t count)
 619{
 620        int nr = to_sensor_dev_attr(attr)->index;
 621        struct i2c_client *client = to_i2c_client(dev);
 622        struct lm85_data *data = i2c_get_clientdata(client);
 623        unsigned long val;
 624        int err;
 625
 626        err = kstrtoul(buf, 10, &val);
 627        if (err)
 628                return err;
 629
 630        mutex_lock(&data->update_lock);
 631        /*
 632         * The ADT7468 has a special high-frequency PWM output mode,
 633         * where all PWM outputs are driven by a 22.5 kHz clock.
 634         * This might confuse the user, but there's not much we can do.
 635         */
 636        if (data->type == adt7468 && val >= 11300) {    /* High freq. mode */
 637                data->cfg5 &= ~ADT7468_HFPWM;
 638                lm85_write_value(client, ADT7468_REG_CFG5, data->cfg5);
 639        } else {                                        /* Low freq. mode */
 640                data->pwm_freq[nr] = FREQ_TO_REG(data->freq_map, val);
 641                lm85_write_value(client, LM85_REG_AFAN_RANGE(nr),
 642                                 (data->zone[nr].range << 4)
 643                                 | data->pwm_freq[nr]);
 644                if (data->type == adt7468) {
 645                        data->cfg5 |= ADT7468_HFPWM;
 646                        lm85_write_value(client, ADT7468_REG_CFG5, data->cfg5);
 647                }
 648        }
 649        mutex_unlock(&data->update_lock);
 650        return count;
 651}
 652
 653#define show_pwm_reg(offset)                                            \
 654static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR,               \
 655                show_pwm, set_pwm, offset - 1);                         \
 656static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR,      \
 657                show_pwm_enable, set_pwm_enable, offset - 1);           \
 658static SENSOR_DEVICE_ATTR(pwm##offset##_freq, S_IRUGO | S_IWUSR,        \
 659                show_pwm_freq, set_pwm_freq, offset - 1)
 660
 661show_pwm_reg(1);
 662show_pwm_reg(2);
 663show_pwm_reg(3);
 664
 665/* Voltages */
 666
 667static ssize_t show_in(struct device *dev, struct device_attribute *attr,
 668                char *buf)
 669{
 670        int nr = to_sensor_dev_attr(attr)->index;
 671        struct lm85_data *data = lm85_update_device(dev);
 672        return sprintf(buf, "%d\n", INSEXT_FROM_REG(nr, data->in[nr],
 673                                                    data->in_ext[nr]));
 674}
 675
 676static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
 677                char *buf)
 678{
 679        int nr = to_sensor_dev_attr(attr)->index;
 680        struct lm85_data *data = lm85_update_device(dev);
 681        return sprintf(buf, "%d\n", INS_FROM_REG(nr, data->in_min[nr]));
 682}
 683
 684static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
 685                const char *buf, size_t count)
 686{
 687        int nr = to_sensor_dev_attr(attr)->index;
 688        struct i2c_client *client = to_i2c_client(dev);
 689        struct lm85_data *data = i2c_get_clientdata(client);
 690        long val;
 691        int err;
 692
 693        err = kstrtol(buf, 10, &val);
 694        if (err)
 695                return err;
 696
 697        mutex_lock(&data->update_lock);
 698        data->in_min[nr] = INS_TO_REG(nr, val);
 699        lm85_write_value(client, LM85_REG_IN_MIN(nr), data->in_min[nr]);
 700        mutex_unlock(&data->update_lock);
 701        return count;
 702}
 703
 704static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
 705                char *buf)
 706{
 707        int nr = to_sensor_dev_attr(attr)->index;
 708        struct lm85_data *data = lm85_update_device(dev);
 709        return sprintf(buf, "%d\n", INS_FROM_REG(nr, data->in_max[nr]));
 710}
 711
 712static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
 713                const char *buf, size_t count)
 714{
 715        int nr = to_sensor_dev_attr(attr)->index;
 716        struct i2c_client *client = to_i2c_client(dev);
 717        struct lm85_data *data = i2c_get_clientdata(client);
 718        long val;
 719        int err;
 720
 721        err = kstrtol(buf, 10, &val);
 722        if (err)
 723                return err;
 724
 725        mutex_lock(&data->update_lock);
 726        data->in_max[nr] = INS_TO_REG(nr, val);
 727        lm85_write_value(client, LM85_REG_IN_MAX(nr), data->in_max[nr]);
 728        mutex_unlock(&data->update_lock);
 729        return count;
 730}
 731
 732#define show_in_reg(offset)                                             \
 733static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO,                  \
 734                show_in, NULL, offset);                                 \
 735static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR,          \
 736                show_in_min, set_in_min, offset);                       \
 737static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR,          \
 738                show_in_max, set_in_max, offset)
 739
 740show_in_reg(0);
 741show_in_reg(1);
 742show_in_reg(2);
 743show_in_reg(3);
 744show_in_reg(4);
 745show_in_reg(5);
 746show_in_reg(6);
 747show_in_reg(7);
 748
 749/* Temps */
 750
 751static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
 752                char *buf)
 753{
 754        int nr = to_sensor_dev_attr(attr)->index;
 755        struct lm85_data *data = lm85_update_device(dev);
 756        return sprintf(buf, "%d\n", TEMPEXT_FROM_REG(data->temp[nr],
 757                                                     data->temp_ext[nr]));
 758}
 759
 760static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
 761                char *buf)
 762{
 763        int nr = to_sensor_dev_attr(attr)->index;
 764        struct lm85_data *data = lm85_update_device(dev);
 765        return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[nr]));
 766}
 767
 768static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
 769                const char *buf, size_t count)
 770{
 771        int nr = to_sensor_dev_attr(attr)->index;
 772        struct i2c_client *client = to_i2c_client(dev);
 773        struct lm85_data *data = i2c_get_clientdata(client);
 774        long val;
 775        int err;
 776
 777        err = kstrtol(buf, 10, &val);
 778        if (err)
 779                return err;
 780
 781        if (IS_ADT7468_OFF64(data))
 782                val += 64;
 783
 784        mutex_lock(&data->update_lock);
 785        data->temp_min[nr] = TEMP_TO_REG(val);
 786        lm85_write_value(client, LM85_REG_TEMP_MIN(nr), data->temp_min[nr]);
 787        mutex_unlock(&data->update_lock);
 788        return count;
 789}
 790
 791static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
 792                char *buf)
 793{
 794        int nr = to_sensor_dev_attr(attr)->index;
 795        struct lm85_data *data = lm85_update_device(dev);
 796        return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[nr]));
 797}
 798
 799static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
 800                const char *buf, size_t count)
 801{
 802        int nr = to_sensor_dev_attr(attr)->index;
 803        struct i2c_client *client = to_i2c_client(dev);
 804        struct lm85_data *data = i2c_get_clientdata(client);
 805        long val;
 806        int err;
 807
 808        err = kstrtol(buf, 10, &val);
 809        if (err)
 810                return err;
 811
 812        if (IS_ADT7468_OFF64(data))
 813                val += 64;
 814
 815        mutex_lock(&data->update_lock);
 816        data->temp_max[nr] = TEMP_TO_REG(val);
 817        lm85_write_value(client, LM85_REG_TEMP_MAX(nr), data->temp_max[nr]);
 818        mutex_unlock(&data->update_lock);
 819        return count;
 820}
 821
 822#define show_temp_reg(offset)                                           \
 823static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO,                \
 824                show_temp, NULL, offset - 1);                           \
 825static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR,        \
 826                show_temp_min, set_temp_min, offset - 1);               \
 827static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR,        \
 828                show_temp_max, set_temp_max, offset - 1);
 829
 830show_temp_reg(1);
 831show_temp_reg(2);
 832show_temp_reg(3);
 833
 834
 835/* Automatic PWM control */
 836
 837static ssize_t show_pwm_auto_channels(struct device *dev,
 838                struct device_attribute *attr, char *buf)
 839{
 840        int nr = to_sensor_dev_attr(attr)->index;
 841        struct lm85_data *data = lm85_update_device(dev);
 842        return sprintf(buf, "%d\n", ZONE_FROM_REG(data->autofan[nr].config));
 843}
 844
 845static ssize_t set_pwm_auto_channels(struct device *dev,
 846                struct device_attribute *attr, const char *buf, size_t count)
 847{
 848        int nr = to_sensor_dev_attr(attr)->index;
 849        struct i2c_client *client = to_i2c_client(dev);
 850        struct lm85_data *data = i2c_get_clientdata(client);
 851        long val;
 852        int err;
 853
 854        err = kstrtol(buf, 10, &val);
 855        if (err)
 856                return err;
 857
 858        mutex_lock(&data->update_lock);
 859        data->autofan[nr].config = (data->autofan[nr].config & (~0xe0))
 860                | ZONE_TO_REG(val);
 861        lm85_write_value(client, LM85_REG_AFAN_CONFIG(nr),
 862                data->autofan[nr].config);
 863        mutex_unlock(&data->update_lock);
 864        return count;
 865}
 866
 867static ssize_t show_pwm_auto_pwm_min(struct device *dev,
 868                struct device_attribute *attr, char *buf)
 869{
 870        int nr = to_sensor_dev_attr(attr)->index;
 871        struct lm85_data *data = lm85_update_device(dev);
 872        return sprintf(buf, "%d\n", PWM_FROM_REG(data->autofan[nr].min_pwm));
 873}
 874
 875static ssize_t set_pwm_auto_pwm_min(struct device *dev,
 876                struct device_attribute *attr, const char *buf, size_t count)
 877{
 878        int nr = to_sensor_dev_attr(attr)->index;
 879        struct i2c_client *client = to_i2c_client(dev);
 880        struct lm85_data *data = i2c_get_clientdata(client);
 881        unsigned long val;
 882        int err;
 883
 884        err = kstrtoul(buf, 10, &val);
 885        if (err)
 886                return err;
 887
 888        mutex_lock(&data->update_lock);
 889        data->autofan[nr].min_pwm = PWM_TO_REG(val);
 890        lm85_write_value(client, LM85_REG_AFAN_MINPWM(nr),
 891                data->autofan[nr].min_pwm);
 892        mutex_unlock(&data->update_lock);
 893        return count;
 894}
 895
 896static ssize_t show_pwm_auto_pwm_minctl(struct device *dev,
 897                struct device_attribute *attr, char *buf)
 898{
 899        int nr = to_sensor_dev_attr(attr)->index;
 900        struct lm85_data *data = lm85_update_device(dev);
 901        return sprintf(buf, "%d\n", data->autofan[nr].min_off);
 902}
 903
 904static ssize_t set_pwm_auto_pwm_minctl(struct device *dev,
 905                struct device_attribute *attr, const char *buf, size_t count)
 906{
 907        int nr = to_sensor_dev_attr(attr)->index;
 908        struct i2c_client *client = to_i2c_client(dev);
 909        struct lm85_data *data = i2c_get_clientdata(client);
 910        u8 tmp;
 911        long val;
 912        int err;
 913
 914        err = kstrtol(buf, 10, &val);
 915        if (err)
 916                return err;
 917
 918        mutex_lock(&data->update_lock);
 919        data->autofan[nr].min_off = val;
 920        tmp = lm85_read_value(client, LM85_REG_AFAN_SPIKE1);
 921        tmp &= ~(0x20 << nr);
 922        if (data->autofan[nr].min_off)
 923                tmp |= 0x20 << nr;
 924        lm85_write_value(client, LM85_REG_AFAN_SPIKE1, tmp);
 925        mutex_unlock(&data->update_lock);
 926        return count;
 927}
 928
 929#define pwm_auto(offset)                                                \
 930static SENSOR_DEVICE_ATTR(pwm##offset##_auto_channels,                  \
 931                S_IRUGO | S_IWUSR, show_pwm_auto_channels,              \
 932                set_pwm_auto_channels, offset - 1);                     \
 933static SENSOR_DEVICE_ATTR(pwm##offset##_auto_pwm_min,                   \
 934                S_IRUGO | S_IWUSR, show_pwm_auto_pwm_min,               \
 935                set_pwm_auto_pwm_min, offset - 1);                      \
 936static SENSOR_DEVICE_ATTR(pwm##offset##_auto_pwm_minctl,                \
 937                S_IRUGO | S_IWUSR, show_pwm_auto_pwm_minctl,            \
 938                set_pwm_auto_pwm_minctl, offset - 1)
 939
 940pwm_auto(1);
 941pwm_auto(2);
 942pwm_auto(3);
 943
 944/* Temperature settings for automatic PWM control */
 945
 946static ssize_t show_temp_auto_temp_off(struct device *dev,
 947                struct device_attribute *attr, char *buf)
 948{
 949        int nr = to_sensor_dev_attr(attr)->index;
 950        struct lm85_data *data = lm85_update_device(dev);
 951        return sprintf(buf, "%d\n", TEMP_FROM_REG(data->zone[nr].limit) -
 952                HYST_FROM_REG(data->zone[nr].hyst));
 953}
 954
 955static ssize_t set_temp_auto_temp_off(struct device *dev,
 956                struct device_attribute *attr, const char *buf, size_t count)
 957{
 958        int nr = to_sensor_dev_attr(attr)->index;
 959        struct i2c_client *client = to_i2c_client(dev);
 960        struct lm85_data *data = i2c_get_clientdata(client);
 961        int min;
 962        long val;
 963        int err;
 964
 965        err = kstrtol(buf, 10, &val);
 966        if (err)
 967                return err;
 968
 969        mutex_lock(&data->update_lock);
 970        min = TEMP_FROM_REG(data->zone[nr].limit);
 971        data->zone[nr].hyst = HYST_TO_REG(min - val);
 972        if (nr == 0 || nr == 1) {
 973                lm85_write_value(client, LM85_REG_AFAN_HYST1,
 974                        (data->zone[0].hyst << 4)
 975                        | data->zone[1].hyst);
 976        } else {
 977                lm85_write_value(client, LM85_REG_AFAN_HYST2,
 978                        (data->zone[2].hyst << 4));
 979        }
 980        mutex_unlock(&data->update_lock);
 981        return count;
 982}
 983
 984static ssize_t show_temp_auto_temp_min(struct device *dev,
 985                struct device_attribute *attr, char *buf)
 986{
 987        int nr = to_sensor_dev_attr(attr)->index;
 988        struct lm85_data *data = lm85_update_device(dev);
 989        return sprintf(buf, "%d\n", TEMP_FROM_REG(data->zone[nr].limit));
 990}
 991
 992static ssize_t set_temp_auto_temp_min(struct device *dev,
 993                struct device_attribute *attr, const char *buf, size_t count)
 994{
 995        int nr = to_sensor_dev_attr(attr)->index;
 996        struct i2c_client *client = to_i2c_client(dev);
 997        struct lm85_data *data = i2c_get_clientdata(client);
 998        long val;
 999        int err;
1000
1001        err = kstrtol(buf, 10, &val);
1002        if (err)
1003                return err;
1004
1005        mutex_lock(&data->update_lock);
1006        data->zone[nr].limit = TEMP_TO_REG(val);
1007        lm85_write_value(client, LM85_REG_AFAN_LIMIT(nr),
1008                data->zone[nr].limit);
1009
1010/* Update temp_auto_max and temp_auto_range */
1011        data->zone[nr].range = RANGE_TO_REG(
1012                TEMP_FROM_REG(data->zone[nr].max_desired) -
1013                TEMP_FROM_REG(data->zone[nr].limit));
1014        lm85_write_value(client, LM85_REG_AFAN_RANGE(nr),
1015                ((data->zone[nr].range & 0x0f) << 4)
1016                | (data->pwm_freq[nr] & 0x07));
1017
1018        mutex_unlock(&data->update_lock);
1019        return count;
1020}
1021
1022static ssize_t show_temp_auto_temp_max(struct device *dev,
1023                struct device_attribute *attr, char *buf)
1024{
1025        int nr = to_sensor_dev_attr(attr)->index;
1026        struct lm85_data *data = lm85_update_device(dev);
1027        return sprintf(buf, "%d\n", TEMP_FROM_REG(data->zone[nr].limit) +
1028                RANGE_FROM_REG(data->zone[nr].range));
1029}
1030
1031static ssize_t set_temp_auto_temp_max(struct device *dev,
1032                struct device_attribute *attr, const char *buf, size_t count)
1033{
1034        int nr = to_sensor_dev_attr(attr)->index;
1035        struct i2c_client *client = to_i2c_client(dev);
1036        struct lm85_data *data = i2c_get_clientdata(client);
1037        int min;
1038        long val;
1039        int err;
1040
1041        err = kstrtol(buf, 10, &val);
1042        if (err)
1043                return err;
1044
1045        mutex_lock(&data->update_lock);
1046        min = TEMP_FROM_REG(data->zone[nr].limit);
1047        data->zone[nr].max_desired = TEMP_TO_REG(val);
1048        data->zone[nr].range = RANGE_TO_REG(
1049                val - min);
1050        lm85_write_value(client, LM85_REG_AFAN_RANGE(nr),
1051                ((data->zone[nr].range & 0x0f) << 4)
1052                | (data->pwm_freq[nr] & 0x07));
1053        mutex_unlock(&data->update_lock);
1054        return count;
1055}
1056
1057static ssize_t show_temp_auto_temp_crit(struct device *dev,
1058                struct device_attribute *attr, char *buf)
1059{
1060        int nr = to_sensor_dev_attr(attr)->index;
1061        struct lm85_data *data = lm85_update_device(dev);
1062        return sprintf(buf, "%d\n", TEMP_FROM_REG(data->zone[nr].critical));
1063}
1064
1065static ssize_t set_temp_auto_temp_crit(struct device *dev,
1066                struct device_attribute *attr, const char *buf, size_t count)
1067{
1068        int nr = to_sensor_dev_attr(attr)->index;
1069        struct i2c_client *client = to_i2c_client(dev);
1070        struct lm85_data *data = i2c_get_clientdata(client);
1071        long val;
1072        int err;
1073
1074        err = kstrtol(buf, 10, &val);
1075        if (err)
1076                return err;
1077
1078        mutex_lock(&data->update_lock);
1079        data->zone[nr].critical = TEMP_TO_REG(val);
1080        lm85_write_value(client, LM85_REG_AFAN_CRITICAL(nr),
1081                data->zone[nr].critical);
1082        mutex_unlock(&data->update_lock);
1083        return count;
1084}
1085
1086#define temp_auto(offset)                                               \
1087static SENSOR_DEVICE_ATTR(temp##offset##_auto_temp_off,                 \
1088                S_IRUGO | S_IWUSR, show_temp_auto_temp_off,             \
1089                set_temp_auto_temp_off, offset - 1);                    \
1090static SENSOR_DEVICE_ATTR(temp##offset##_auto_temp_min,                 \
1091                S_IRUGO | S_IWUSR, show_temp_auto_temp_min,             \
1092                set_temp_auto_temp_min, offset - 1);                    \
1093static SENSOR_DEVICE_ATTR(temp##offset##_auto_temp_max,                 \
1094                S_IRUGO | S_IWUSR, show_temp_auto_temp_max,             \
1095                set_temp_auto_temp_max, offset - 1);                    \
1096static SENSOR_DEVICE_ATTR(temp##offset##_auto_temp_crit,                \
1097                S_IRUGO | S_IWUSR, show_temp_auto_temp_crit,            \
1098                set_temp_auto_temp_crit, offset - 1);
1099
1100temp_auto(1);
1101temp_auto(2);
1102temp_auto(3);
1103
1104static struct attribute *lm85_attributes[] = {
1105        &sensor_dev_attr_fan1_input.dev_attr.attr,
1106        &sensor_dev_attr_fan2_input.dev_attr.attr,
1107        &sensor_dev_attr_fan3_input.dev_attr.attr,
1108        &sensor_dev_attr_fan4_input.dev_attr.attr,
1109        &sensor_dev_attr_fan1_min.dev_attr.attr,
1110        &sensor_dev_attr_fan2_min.dev_attr.attr,
1111        &sensor_dev_attr_fan3_min.dev_attr.attr,
1112        &sensor_dev_attr_fan4_min.dev_attr.attr,
1113        &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1114        &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1115        &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1116        &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1117
1118        &sensor_dev_attr_pwm1.dev_attr.attr,
1119        &sensor_dev_attr_pwm2.dev_attr.attr,
1120        &sensor_dev_attr_pwm3.dev_attr.attr,
1121        &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1122        &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1123        &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1124        &sensor_dev_attr_pwm1_freq.dev_attr.attr,
1125        &sensor_dev_attr_pwm2_freq.dev_attr.attr,
1126        &sensor_dev_attr_pwm3_freq.dev_attr.attr,
1127
1128        &sensor_dev_attr_in0_input.dev_attr.attr,
1129        &sensor_dev_attr_in1_input.dev_attr.attr,
1130        &sensor_dev_attr_in2_input.dev_attr.attr,
1131        &sensor_dev_attr_in3_input.dev_attr.attr,
1132        &sensor_dev_attr_in0_min.dev_attr.attr,
1133        &sensor_dev_attr_in1_min.dev_attr.attr,
1134        &sensor_dev_attr_in2_min.dev_attr.attr,
1135        &sensor_dev_attr_in3_min.dev_attr.attr,
1136        &sensor_dev_attr_in0_max.dev_attr.attr,
1137        &sensor_dev_attr_in1_max.dev_attr.attr,
1138        &sensor_dev_attr_in2_max.dev_attr.attr,
1139        &sensor_dev_attr_in3_max.dev_attr.attr,
1140        &sensor_dev_attr_in0_alarm.dev_attr.attr,
1141        &sensor_dev_attr_in1_alarm.dev_attr.attr,
1142        &sensor_dev_attr_in2_alarm.dev_attr.attr,
1143        &sensor_dev_attr_in3_alarm.dev_attr.attr,
1144
1145        &sensor_dev_attr_temp1_input.dev_attr.attr,
1146        &sensor_dev_attr_temp2_input.dev_attr.attr,
1147        &sensor_dev_attr_temp3_input.dev_attr.attr,
1148        &sensor_dev_attr_temp1_min.dev_attr.attr,
1149        &sensor_dev_attr_temp2_min.dev_attr.attr,
1150        &sensor_dev_attr_temp3_min.dev_attr.attr,
1151        &sensor_dev_attr_temp1_max.dev_attr.attr,
1152        &sensor_dev_attr_temp2_max.dev_attr.attr,
1153        &sensor_dev_attr_temp3_max.dev_attr.attr,
1154        &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1155        &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1156        &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1157        &sensor_dev_attr_temp1_fault.dev_attr.attr,
1158        &sensor_dev_attr_temp3_fault.dev_attr.attr,
1159
1160        &sensor_dev_attr_pwm1_auto_channels.dev_attr.attr,
1161        &sensor_dev_attr_pwm2_auto_channels.dev_attr.attr,
1162        &sensor_dev_attr_pwm3_auto_channels.dev_attr.attr,
1163        &sensor_dev_attr_pwm1_auto_pwm_min.dev_attr.attr,
1164        &sensor_dev_attr_pwm2_auto_pwm_min.dev_attr.attr,
1165        &sensor_dev_attr_pwm3_auto_pwm_min.dev_attr.attr,
1166
1167        &sensor_dev_attr_temp1_auto_temp_min.dev_attr.attr,
1168        &sensor_dev_attr_temp2_auto_temp_min.dev_attr.attr,
1169        &sensor_dev_attr_temp3_auto_temp_min.dev_attr.attr,
1170        &sensor_dev_attr_temp1_auto_temp_max.dev_attr.attr,
1171        &sensor_dev_attr_temp2_auto_temp_max.dev_attr.attr,
1172        &sensor_dev_attr_temp3_auto_temp_max.dev_attr.attr,
1173        &sensor_dev_attr_temp1_auto_temp_crit.dev_attr.attr,
1174        &sensor_dev_attr_temp2_auto_temp_crit.dev_attr.attr,
1175        &sensor_dev_attr_temp3_auto_temp_crit.dev_attr.attr,
1176
1177        &dev_attr_vrm.attr,
1178        &dev_attr_cpu0_vid.attr,
1179        &dev_attr_alarms.attr,
1180        NULL
1181};
1182
1183static const struct attribute_group lm85_group = {
1184        .attrs = lm85_attributes,
1185};
1186
1187static struct attribute *lm85_attributes_minctl[] = {
1188        &sensor_dev_attr_pwm1_auto_pwm_minctl.dev_attr.attr,
1189        &sensor_dev_attr_pwm2_auto_pwm_minctl.dev_attr.attr,
1190        &sensor_dev_attr_pwm3_auto_pwm_minctl.dev_attr.attr,
1191        NULL
1192};
1193
1194static const struct attribute_group lm85_group_minctl = {
1195        .attrs = lm85_attributes_minctl,
1196};
1197
1198static struct attribute *lm85_attributes_temp_off[] = {
1199        &sensor_dev_attr_temp1_auto_temp_off.dev_attr.attr,
1200        &sensor_dev_attr_temp2_auto_temp_off.dev_attr.attr,
1201        &sensor_dev_attr_temp3_auto_temp_off.dev_attr.attr,
1202        NULL
1203};
1204
1205static const struct attribute_group lm85_group_temp_off = {
1206        .attrs = lm85_attributes_temp_off,
1207};
1208
1209static struct attribute *lm85_attributes_in4[] = {
1210        &sensor_dev_attr_in4_input.dev_attr.attr,
1211        &sensor_dev_attr_in4_min.dev_attr.attr,
1212        &sensor_dev_attr_in4_max.dev_attr.attr,
1213        &sensor_dev_attr_in4_alarm.dev_attr.attr,
1214        NULL
1215};
1216
1217static const struct attribute_group lm85_group_in4 = {
1218        .attrs = lm85_attributes_in4,
1219};
1220
1221static struct attribute *lm85_attributes_in567[] = {
1222        &sensor_dev_attr_in5_input.dev_attr.attr,
1223        &sensor_dev_attr_in6_input.dev_attr.attr,
1224        &sensor_dev_attr_in7_input.dev_attr.attr,
1225        &sensor_dev_attr_in5_min.dev_attr.attr,
1226        &sensor_dev_attr_in6_min.dev_attr.attr,
1227        &sensor_dev_attr_in7_min.dev_attr.attr,
1228        &sensor_dev_attr_in5_max.dev_attr.attr,
1229        &sensor_dev_attr_in6_max.dev_attr.attr,
1230        &sensor_dev_attr_in7_max.dev_attr.attr,
1231        &sensor_dev_attr_in5_alarm.dev_attr.attr,
1232        &sensor_dev_attr_in6_alarm.dev_attr.attr,
1233        &sensor_dev_attr_in7_alarm.dev_attr.attr,
1234        NULL
1235};
1236
1237static const struct attribute_group lm85_group_in567 = {
1238        .attrs = lm85_attributes_in567,
1239};
1240
1241static void lm85_init_client(struct i2c_client *client)
1242{
1243        int value;
1244
1245        /* Start monitoring if needed */
1246        value = lm85_read_value(client, LM85_REG_CONFIG);
1247        if (!(value & 0x01)) {
1248                dev_info(&client->dev, "Starting monitoring\n");
1249                lm85_write_value(client, LM85_REG_CONFIG, value | 0x01);
1250        }
1251
1252        /* Warn about unusual configuration bits */
1253        if (value & 0x02)
1254                dev_warn(&client->dev, "Device configuration is locked\n");
1255        if (!(value & 0x04))
1256                dev_warn(&client->dev, "Device is not ready\n");
1257}
1258
1259static int lm85_is_fake(struct i2c_client *client)
1260{
1261        /*
1262         * Differenciate between real LM96000 and Winbond WPCD377I. The latter
1263         * emulate the former except that it has no hardware monitoring function
1264         * so the readings are always 0.
1265         */
1266        int i;
1267        u8 in_temp, fan;
1268
1269        for (i = 0; i < 8; i++) {
1270                in_temp = i2c_smbus_read_byte_data(client, 0x20 + i);
1271                fan = i2c_smbus_read_byte_data(client, 0x28 + i);
1272                if (in_temp != 0x00 || fan != 0xff)
1273                        return 0;
1274        }
1275
1276        return 1;
1277}
1278
1279/* Return 0 if detection is successful, -ENODEV otherwise */
1280static int lm85_detect(struct i2c_client *client, struct i2c_board_info *info)
1281{
1282        struct i2c_adapter *adapter = client->adapter;
1283        int address = client->addr;
1284        const char *type_name;
1285        int company, verstep;
1286
1287        if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
1288                /* We need to be able to do byte I/O */
1289                return -ENODEV;
1290        }
1291
1292        /* Determine the chip type */
1293        company = lm85_read_value(client, LM85_REG_COMPANY);
1294        verstep = lm85_read_value(client, LM85_REG_VERSTEP);
1295
1296        dev_dbg(&adapter->dev, "Detecting device at 0x%02x with "
1297                "COMPANY: 0x%02x and VERSTEP: 0x%02x\n",
1298                address, company, verstep);
1299
1300        /* All supported chips have the version in common */
1301        if ((verstep & LM85_VERSTEP_VMASK) != LM85_VERSTEP_GENERIC &&
1302            (verstep & LM85_VERSTEP_VMASK) != LM85_VERSTEP_GENERIC2) {
1303                dev_dbg(&adapter->dev,
1304                        "Autodetection failed: unsupported version\n");
1305                return -ENODEV;
1306        }
1307        type_name = "lm85";
1308
1309        /* Now, refine the detection */
1310        if (company == LM85_COMPANY_NATIONAL) {
1311                switch (verstep) {
1312                case LM85_VERSTEP_LM85C:
1313                        type_name = "lm85c";
1314                        break;
1315                case LM85_VERSTEP_LM85B:
1316                        type_name = "lm85b";
1317                        break;
1318                case LM85_VERSTEP_LM96000_1:
1319                case LM85_VERSTEP_LM96000_2:
1320                        /* Check for Winbond WPCD377I */
1321                        if (lm85_is_fake(client)) {
1322                                dev_dbg(&adapter->dev,
1323                                        "Found Winbond WPCD377I, ignoring\n");
1324                                return -ENODEV;
1325                        }
1326                        break;
1327                }
1328        } else if (company == LM85_COMPANY_ANALOG_DEV) {
1329                switch (verstep) {
1330                case LM85_VERSTEP_ADM1027:
1331                        type_name = "adm1027";
1332                        break;
1333                case LM85_VERSTEP_ADT7463:
1334                case LM85_VERSTEP_ADT7463C:
1335                        type_name = "adt7463";
1336                        break;
1337                case LM85_VERSTEP_ADT7468_1:
1338                case LM85_VERSTEP_ADT7468_2:
1339                        type_name = "adt7468";
1340                        break;
1341                }
1342        } else if (company == LM85_COMPANY_SMSC) {
1343                switch (verstep) {
1344                case LM85_VERSTEP_EMC6D100_A0:
1345                case LM85_VERSTEP_EMC6D100_A1:
1346                        /* Note: we can't tell a '100 from a '101 */
1347                        type_name = "emc6d100";
1348                        break;
1349                case LM85_VERSTEP_EMC6D102:
1350                        type_name = "emc6d102";
1351                        break;
1352                case LM85_VERSTEP_EMC6D103_A0:
1353                case LM85_VERSTEP_EMC6D103_A1:
1354                        type_name = "emc6d103";
1355                        break;
1356                case LM85_VERSTEP_EMC6D103S:
1357                        type_name = "emc6d103s";
1358                        break;
1359                }
1360        } else {
1361                dev_dbg(&adapter->dev,
1362                        "Autodetection failed: unknown vendor\n");
1363                return -ENODEV;
1364        }
1365
1366        strlcpy(info->type, type_name, I2C_NAME_SIZE);
1367
1368        return 0;
1369}
1370
1371static void lm85_remove_files(struct i2c_client *client, struct lm85_data *data)
1372{
1373        sysfs_remove_group(&client->dev.kobj, &lm85_group);
1374        if (data->type != emc6d103s) {
1375                sysfs_remove_group(&client->dev.kobj, &lm85_group_minctl);
1376                sysfs_remove_group(&client->dev.kobj, &lm85_group_temp_off);
1377        }
1378        if (!data->has_vid5)
1379                sysfs_remove_group(&client->dev.kobj, &lm85_group_in4);
1380        if (data->type == emc6d100)
1381                sysfs_remove_group(&client->dev.kobj, &lm85_group_in567);
1382}
1383
1384static int lm85_probe(struct i2c_client *client,
1385                      const struct i2c_device_id *id)
1386{
1387        struct lm85_data *data;
1388        int err;
1389
1390        data = devm_kzalloc(&client->dev, sizeof(struct lm85_data), GFP_KERNEL);
1391        if (!data)
1392                return -ENOMEM;
1393
1394        i2c_set_clientdata(client, data);
1395        data->type = id->driver_data;
1396        mutex_init(&data->update_lock);
1397
1398        /* Fill in the chip specific driver values */
1399        switch (data->type) {
1400        case adm1027:
1401        case adt7463:
1402        case adt7468:
1403        case emc6d100:
1404        case emc6d102:
1405        case emc6d103:
1406        case emc6d103s:
1407                data->freq_map = adm1027_freq_map;
1408                break;
1409        default:
1410                data->freq_map = lm85_freq_map;
1411        }
1412
1413        /* Set the VRM version */
1414        data->vrm = vid_which_vrm();
1415
1416        /* Initialize the LM85 chip */
1417        lm85_init_client(client);
1418
1419        /* Register sysfs hooks */
1420        err = sysfs_create_group(&client->dev.kobj, &lm85_group);
1421        if (err)
1422                return err;
1423
1424        /* minctl and temp_off exist on all chips except emc6d103s */
1425        if (data->type != emc6d103s) {
1426                err = sysfs_create_group(&client->dev.kobj, &lm85_group_minctl);
1427                if (err)
1428                        goto err_remove_files;
1429                err = sysfs_create_group(&client->dev.kobj,
1430                                         &lm85_group_temp_off);
1431                if (err)
1432                        goto err_remove_files;
1433        }
1434
1435        /*
1436         * The ADT7463/68 have an optional VRM 10 mode where pin 21 is used
1437         * as a sixth digital VID input rather than an analog input.
1438         */
1439        if (data->type == adt7463 || data->type == adt7468) {
1440                u8 vid = lm85_read_value(client, LM85_REG_VID);
1441                if (vid & 0x80)
1442                        data->has_vid5 = true;
1443        }
1444
1445        if (!data->has_vid5) {
1446                err = sysfs_create_group(&client->dev.kobj, &lm85_group_in4);
1447                if (err)
1448                        goto err_remove_files;
1449        }
1450
1451        /* The EMC6D100 has 3 additional voltage inputs */
1452        if (data->type == emc6d100) {
1453                err = sysfs_create_group(&client->dev.kobj, &lm85_group_in567);
1454                if (err)
1455                        goto err_remove_files;
1456        }
1457
1458        data->hwmon_dev = hwmon_device_register(&client->dev);
1459        if (IS_ERR(data->hwmon_dev)) {
1460                err = PTR_ERR(data->hwmon_dev);
1461                goto err_remove_files;
1462        }
1463
1464        return 0;
1465
1466        /* Error out and cleanup code */
1467 err_remove_files:
1468        lm85_remove_files(client, data);
1469        return err;
1470}
1471
1472static int lm85_remove(struct i2c_client *client)
1473{
1474        struct lm85_data *data = i2c_get_clientdata(client);
1475        hwmon_device_unregister(data->hwmon_dev);
1476        lm85_remove_files(client, data);
1477        return 0;
1478}
1479
1480
1481static int lm85_read_value(struct i2c_client *client, u8 reg)
1482{
1483        int res;
1484
1485        /* What size location is it? */
1486        switch (reg) {
1487        case LM85_REG_FAN(0):  /* Read WORD data */
1488        case LM85_REG_FAN(1):
1489        case LM85_REG_FAN(2):
1490        case LM85_REG_FAN(3):
1491        case LM85_REG_FAN_MIN(0):
1492        case LM85_REG_FAN_MIN(1):
1493        case LM85_REG_FAN_MIN(2):
1494        case LM85_REG_FAN_MIN(3):
1495        case LM85_REG_ALARM1:   /* Read both bytes at once */
1496                res = i2c_smbus_read_byte_data(client, reg) & 0xff;
1497                res |= i2c_smbus_read_byte_data(client, reg + 1) << 8;
1498                break;
1499        default:        /* Read BYTE data */
1500                res = i2c_smbus_read_byte_data(client, reg);
1501                break;
1502        }
1503
1504        return res;
1505}
1506
1507static void lm85_write_value(struct i2c_client *client, u8 reg, int value)
1508{
1509        switch (reg) {
1510        case LM85_REG_FAN(0):  /* Write WORD data */
1511        case LM85_REG_FAN(1):
1512        case LM85_REG_FAN(2):
1513        case LM85_REG_FAN(3):
1514        case LM85_REG_FAN_MIN(0):
1515        case LM85_REG_FAN_MIN(1):
1516        case LM85_REG_FAN_MIN(2):
1517        case LM85_REG_FAN_MIN(3):
1518        /* NOTE: ALARM is read only, so not included here */
1519                i2c_smbus_write_byte_data(client, reg, value & 0xff);
1520                i2c_smbus_write_byte_data(client, reg + 1, value >> 8);
1521                break;
1522        default:        /* Write BYTE data */
1523                i2c_smbus_write_byte_data(client, reg, value);
1524                break;
1525        }
1526}
1527
1528static struct lm85_data *lm85_update_device(struct device *dev)
1529{
1530        struct i2c_client *client = to_i2c_client(dev);
1531        struct lm85_data *data = i2c_get_clientdata(client);
1532        int i;
1533
1534        mutex_lock(&data->update_lock);
1535
1536        if (!data->valid ||
1537             time_after(jiffies, data->last_reading + LM85_DATA_INTERVAL)) {
1538                /* Things that change quickly */
1539                dev_dbg(&client->dev, "Reading sensor values\n");
1540
1541                /*
1542                 * Have to read extended bits first to "freeze" the
1543                 * more significant bits that are read later.
1544                 * There are 2 additional resolution bits per channel and we
1545                 * have room for 4, so we shift them to the left.
1546                 */
1547                if (data->type == adm1027 || data->type == adt7463 ||
1548                    data->type == adt7468) {
1549                        int ext1 = lm85_read_value(client,
1550                                                   ADM1027_REG_EXTEND_ADC1);
1551                        int ext2 =  lm85_read_value(client,
1552                                                    ADM1027_REG_EXTEND_ADC2);
1553                        int val = (ext1 << 8) + ext2;
1554
1555                        for (i = 0; i <= 4; i++)
1556                                data->in_ext[i] =
1557                                        ((val >> (i * 2)) & 0x03) << 2;
1558
1559                        for (i = 0; i <= 2; i++)
1560                                data->temp_ext[i] =
1561                                        (val >> ((i + 4) * 2)) & 0x0c;
1562                }
1563
1564                data->vid = lm85_read_value(client, LM85_REG_VID);
1565
1566                for (i = 0; i <= 3; ++i) {
1567                        data->in[i] =
1568                            lm85_read_value(client, LM85_REG_IN(i));
1569                        data->fan[i] =
1570                            lm85_read_value(client, LM85_REG_FAN(i));
1571                }
1572
1573                if (!data->has_vid5)
1574                        data->in[4] = lm85_read_value(client, LM85_REG_IN(4));
1575
1576                if (data->type == adt7468)
1577                        data->cfg5 = lm85_read_value(client, ADT7468_REG_CFG5);
1578
1579                for (i = 0; i <= 2; ++i) {
1580                        data->temp[i] =
1581                            lm85_read_value(client, LM85_REG_TEMP(i));
1582                        data->pwm[i] =
1583                            lm85_read_value(client, LM85_REG_PWM(i));
1584
1585                        if (IS_ADT7468_OFF64(data))
1586                                data->temp[i] -= 64;
1587                }
1588
1589                data->alarms = lm85_read_value(client, LM85_REG_ALARM1);
1590
1591                if (data->type == emc6d100) {
1592                        /* Three more voltage sensors */
1593                        for (i = 5; i <= 7; ++i) {
1594                                data->in[i] = lm85_read_value(client,
1595                                                        EMC6D100_REG_IN(i));
1596                        }
1597                        /* More alarm bits */
1598                        data->alarms |= lm85_read_value(client,
1599                                                EMC6D100_REG_ALARM3) << 16;
1600                } else if (data->type == emc6d102 || data->type == emc6d103 ||
1601                           data->type == emc6d103s) {
1602                        /*
1603                         * Have to read LSB bits after the MSB ones because
1604                         * the reading of the MSB bits has frozen the
1605                         * LSBs (backward from the ADM1027).
1606                         */
1607                        int ext1 = lm85_read_value(client,
1608                                                   EMC6D102_REG_EXTEND_ADC1);
1609                        int ext2 = lm85_read_value(client,
1610                                                   EMC6D102_REG_EXTEND_ADC2);
1611                        int ext3 = lm85_read_value(client,
1612                                                   EMC6D102_REG_EXTEND_ADC3);
1613                        int ext4 = lm85_read_value(client,
1614                                                   EMC6D102_REG_EXTEND_ADC4);
1615                        data->in_ext[0] = ext3 & 0x0f;
1616                        data->in_ext[1] = ext4 & 0x0f;
1617                        data->in_ext[2] = ext4 >> 4;
1618                        data->in_ext[3] = ext3 >> 4;
1619                        data->in_ext[4] = ext2 >> 4;
1620
1621                        data->temp_ext[0] = ext1 & 0x0f;
1622                        data->temp_ext[1] = ext2 & 0x0f;
1623                        data->temp_ext[2] = ext1 >> 4;
1624                }
1625
1626                data->last_reading = jiffies;
1627        }  /* last_reading */
1628
1629        if (!data->valid ||
1630             time_after(jiffies, data->last_config + LM85_CONFIG_INTERVAL)) {
1631                /* Things that don't change often */
1632                dev_dbg(&client->dev, "Reading config values\n");
1633
1634                for (i = 0; i <= 3; ++i) {
1635                        data->in_min[i] =
1636                            lm85_read_value(client, LM85_REG_IN_MIN(i));
1637                        data->in_max[i] =
1638                            lm85_read_value(client, LM85_REG_IN_MAX(i));
1639                        data->fan_min[i] =
1640                            lm85_read_value(client, LM85_REG_FAN_MIN(i));
1641                }
1642
1643                if (!data->has_vid5)  {
1644                        data->in_min[4] = lm85_read_value(client,
1645                                          LM85_REG_IN_MIN(4));
1646                        data->in_max[4] = lm85_read_value(client,
1647                                          LM85_REG_IN_MAX(4));
1648                }
1649
1650                if (data->type == emc6d100) {
1651                        for (i = 5; i <= 7; ++i) {
1652                                data->in_min[i] = lm85_read_value(client,
1653                                                EMC6D100_REG_IN_MIN(i));
1654                                data->in_max[i] = lm85_read_value(client,
1655                                                EMC6D100_REG_IN_MAX(i));
1656                        }
1657                }
1658
1659                for (i = 0; i <= 2; ++i) {
1660                        int val;
1661
1662                        data->temp_min[i] =
1663                            lm85_read_value(client, LM85_REG_TEMP_MIN(i));
1664                        data->temp_max[i] =
1665                            lm85_read_value(client, LM85_REG_TEMP_MAX(i));
1666
1667                        data->autofan[i].config =
1668                            lm85_read_value(client, LM85_REG_AFAN_CONFIG(i));
1669                        val = lm85_read_value(client, LM85_REG_AFAN_RANGE(i));
1670                        data->pwm_freq[i] = val & 0x07;
1671                        data->zone[i].range = val >> 4;
1672                        data->autofan[i].min_pwm =
1673                            lm85_read_value(client, LM85_REG_AFAN_MINPWM(i));
1674                        data->zone[i].limit =
1675                            lm85_read_value(client, LM85_REG_AFAN_LIMIT(i));
1676                        data->zone[i].critical =
1677                            lm85_read_value(client, LM85_REG_AFAN_CRITICAL(i));
1678
1679                        if (IS_ADT7468_OFF64(data)) {
1680                                data->temp_min[i] -= 64;
1681                                data->temp_max[i] -= 64;
1682                                data->zone[i].limit -= 64;
1683                                data->zone[i].critical -= 64;
1684                        }
1685                }
1686
1687                if (data->type != emc6d103s) {
1688                        i = lm85_read_value(client, LM85_REG_AFAN_SPIKE1);
1689                        data->autofan[0].min_off = (i & 0x20) != 0;
1690                        data->autofan[1].min_off = (i & 0x40) != 0;
1691                        data->autofan[2].min_off = (i & 0x80) != 0;
1692
1693                        i = lm85_read_value(client, LM85_REG_AFAN_HYST1);
1694                        data->zone[0].hyst = i >> 4;
1695                        data->zone[1].hyst = i & 0x0f;
1696
1697                        i = lm85_read_value(client, LM85_REG_AFAN_HYST2);
1698                        data->zone[2].hyst = i >> 4;
1699                }
1700
1701                data->last_config = jiffies;
1702        }  /* last_config */
1703
1704        data->valid = 1;
1705
1706        mutex_unlock(&data->update_lock);
1707
1708        return data;
1709}
1710
1711module_i2c_driver(lm85_driver);
1712
1713MODULE_LICENSE("GPL");
1714MODULE_AUTHOR("Philip Pokorny <ppokorny@penguincomputing.com>, "
1715        "Margit Schubert-While <margitsw@t-online.de>, "
1716        "Justin Thiessen <jthiessen@penguincomputing.com>");
1717MODULE_DESCRIPTION("LM85-B, LM85-C driver");
1718
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