drivers/hwmon/w83792d.c

   1 /*
   2  * w83792d.c - Part of lm_sensors, Linux kernel modules for hardware
   3  *             monitoring
   4  * Copyright (C) 2004, 2005 Winbond Electronics Corp.
   5  *                          Chunhao Huang <DZShen@Winbond.com.tw>,
   6  *                          Rudolf Marek <r.marek@assembler.cz>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21  *
  22  * Note:
  23  * 1. This driver is only for 2.6 kernel, 2.4 kernel need a different driver.
  24  * 2. This driver is only for Winbond W83792D C version device, there
  25  *     are also some motherboards with B version W83792D device. The
  26  *     calculation method to in6-in7(measured value, limits) is a little
  27  *     different between C and B version. C or B version can be identified
  28  *     by CR[0x49h].
  29  */
  30
  31 /*
  32  * Supports following chips:
  33  *
  34  * Chip         #vin    #fanin  #pwm    #temp   wchipid vendid  i2c     ISA
  35  * w83792d      9       7       7       3       0x7a    0x5ca3  yes     no
  36  */
  37
  38 #include <linux/module.h>
  39 #include <linux/init.h>
  40 #include <linux/slab.h>
  41 #include <linux/i2c.h>
  42 #include <linux/hwmon.h>
  43 #include <linux/hwmon-sysfs.h>
  44 #include <linux/err.h>
  45 #include <linux/mutex.h>
  46 #include <linux/sysfs.h>
  47 #include <linux/jiffies.h>
  48
  49 /* Addresses to scan */
  50 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f,
  51                                                 I2C_CLIENT_END };
  52
  53 /* Insmod parameters */
  54
  55 static unsigned short force_subclients[4];
  56 module_param_array(force_subclients, short, NULL, 0);
  57 MODULE_PARM_DESC(force_subclients,
  58                  "List of subclient addresses: {bus, clientaddr, subclientaddr1, subclientaddr2}");
  59
  60 static bool init;
  61 module_param(init, bool, 0);
  62 MODULE_PARM_DESC(init, "Set to one to force chip initialization");
  63
  64 /* The W83792D registers */
  65 static const u8 W83792D_REG_IN[9] = {
  66         0x20,   /* Vcore A in DataSheet */
  67         0x21,   /* Vcore B in DataSheet */
  68         0x22,   /* VIN0 in DataSheet */
  69         0x23,   /* VIN1 in DataSheet */
  70         0x24,   /* VIN2 in DataSheet */
  71         0x25,   /* VIN3 in DataSheet */
  72         0x26,   /* 5VCC in DataSheet */
  73         0xB0,   /* 5VSB in DataSheet */
  74         0xB1    /* VBAT in DataSheet */
  75 };
  76 #define W83792D_REG_LOW_BITS1 0x3E  /* Low Bits I in DataSheet */
  77 #define W83792D_REG_LOW_BITS2 0x3F  /* Low Bits II in DataSheet */
  78 static const u8 W83792D_REG_IN_MAX[9] = {
  79         0x2B,   /* Vcore A High Limit in DataSheet */
  80         0x2D,   /* Vcore B High Limit in DataSheet */
  81         0x2F,   /* VIN0 High Limit in DataSheet */
  82         0x31,   /* VIN1 High Limit in DataSheet */
  83         0x33,   /* VIN2 High Limit in DataSheet */
  84         0x35,   /* VIN3 High Limit in DataSheet */
  85         0x37,   /* 5VCC High Limit in DataSheet */
  86         0xB4,   /* 5VSB High Limit in DataSheet */
  87         0xB6    /* VBAT High Limit in DataSheet */
  88 };
  89 static const u8 W83792D_REG_IN_MIN[9] = {
  90         0x2C,   /* Vcore A Low Limit in DataSheet */
  91         0x2E,   /* Vcore B Low Limit in DataSheet */
  92         0x30,   /* VIN0 Low Limit in DataSheet */
  93         0x32,   /* VIN1 Low Limit in DataSheet */
  94         0x34,   /* VIN2 Low Limit in DataSheet */
  95         0x36,   /* VIN3 Low Limit in DataSheet */
  96         0x38,   /* 5VCC Low Limit in DataSheet */
  97         0xB5,   /* 5VSB Low Limit in DataSheet */
  98         0xB7    /* VBAT Low Limit in DataSheet */
  99 };
 100 static const u8 W83792D_REG_FAN[7] = {
 101         0x28,   /* FAN 1 Count in DataSheet */
 102         0x29,   /* FAN 2 Count in DataSheet */
 103         0x2A,   /* FAN 3 Count in DataSheet */
 104         0xB8,   /* FAN 4 Count in DataSheet */
 105         0xB9,   /* FAN 5 Count in DataSheet */
 106         0xBA,   /* FAN 6 Count in DataSheet */
 107         0xBE    /* FAN 7 Count in DataSheet */
 108 };
 109 static const u8 W83792D_REG_FAN_MIN[7] = {
 110         0x3B,   /* FAN 1 Count Low Limit in DataSheet */
 111         0x3C,   /* FAN 2 Count Low Limit in DataSheet */
 112         0x3D,   /* FAN 3 Count Low Limit in DataSheet */
 113         0xBB,   /* FAN 4 Count Low Limit in DataSheet */
 114         0xBC,   /* FAN 5 Count Low Limit in DataSheet */
 115         0xBD,   /* FAN 6 Count Low Limit in DataSheet */
 116         0xBF    /* FAN 7 Count Low Limit in DataSheet */
 117 };
 118 #define W83792D_REG_FAN_CFG 0x84        /* FAN Configuration in DataSheet */
 119 static const u8 W83792D_REG_FAN_DIV[4] = {
 120         0x47,   /* contains FAN2 and FAN1 Divisor */
 121         0x5B,   /* contains FAN4 and FAN3 Divisor */
 122         0x5C,   /* contains FAN6 and FAN5 Divisor */
 123         0x9E    /* contains FAN7 Divisor. */
 124 };
 125 static const u8 W83792D_REG_PWM[7] = {
 126         0x81,   /* FAN 1 Duty Cycle, be used to control */
 127         0x83,   /* FAN 2 Duty Cycle, be used to control */
 128         0x94,   /* FAN 3 Duty Cycle, be used to control */
 129         0xA3,   /* FAN 4 Duty Cycle, be used to control */
 130         0xA4,   /* FAN 5 Duty Cycle, be used to control */
 131         0xA5,   /* FAN 6 Duty Cycle, be used to control */
 132         0xA6    /* FAN 7 Duty Cycle, be used to control */
 133 };
 134 #define W83792D_REG_BANK                0x4E
 135 #define W83792D_REG_TEMP2_CONFIG        0xC2
 136 #define W83792D_REG_TEMP3_CONFIG        0xCA
 137
 138 static const u8 W83792D_REG_TEMP1[3] = {
 139         0x27,   /* TEMP 1 in DataSheet */
 140         0x39,   /* TEMP 1 Over in DataSheet */
 141         0x3A,   /* TEMP 1 Hyst in DataSheet */
 142 };
 143
 144 static const u8 W83792D_REG_TEMP_ADD[2][6] = {
 145         { 0xC0,         /* TEMP 2 in DataSheet */
 146           0xC1,         /* TEMP 2(0.5 deg) in DataSheet */
 147           0xC5,         /* TEMP 2 Over High part in DataSheet */
 148           0xC6,         /* TEMP 2 Over Low part in DataSheet */
 149           0xC3,         /* TEMP 2 Thyst High part in DataSheet */
 150           0xC4 },       /* TEMP 2 Thyst Low part in DataSheet */
 151         { 0xC8,         /* TEMP 3 in DataSheet */
 152           0xC9,         /* TEMP 3(0.5 deg) in DataSheet */
 153           0xCD,         /* TEMP 3 Over High part in DataSheet */
 154           0xCE,         /* TEMP 3 Over Low part in DataSheet */
 155           0xCB,         /* TEMP 3 Thyst High part in DataSheet */
 156           0xCC }        /* TEMP 3 Thyst Low part in DataSheet */
 157 };
 158
 159 static const u8 W83792D_REG_THERMAL[3] = {
 160         0x85,   /* SmartFanI: Fan1 target value */
 161         0x86,   /* SmartFanI: Fan2 target value */
 162         0x96    /* SmartFanI: Fan3 target value */
 163 };
 164
 165 static const u8 W83792D_REG_TOLERANCE[3] = {
 166         0x87,   /* (bit3-0)SmartFan Fan1 tolerance */
 167         0x87,   /* (bit7-4)SmartFan Fan2 tolerance */
 168         0x97    /* (bit3-0)SmartFan Fan3 tolerance */
 169 };
 170
 171 static const u8 W83792D_REG_POINTS[3][4] = {
 172         { 0x85,         /* SmartFanII: Fan1 temp point 1 */
 173           0xE3,         /* SmartFanII: Fan1 temp point 2 */
 174           0xE4,         /* SmartFanII: Fan1 temp point 3 */
 175           0xE5 },       /* SmartFanII: Fan1 temp point 4 */
 176         { 0x86,         /* SmartFanII: Fan2 temp point 1 */
 177           0xE6,         /* SmartFanII: Fan2 temp point 2 */
 178           0xE7,         /* SmartFanII: Fan2 temp point 3 */
 179           0xE8 },       /* SmartFanII: Fan2 temp point 4 */
 180         { 0x96,         /* SmartFanII: Fan3 temp point 1 */
 181           0xE9,         /* SmartFanII: Fan3 temp point 2 */
 182           0xEA,         /* SmartFanII: Fan3 temp point 3 */
 183           0xEB }        /* SmartFanII: Fan3 temp point 4 */
 184 };
 185
 186 static const u8 W83792D_REG_LEVELS[3][4] = {
 187         { 0x88,         /* (bit3-0) SmartFanII: Fan1 Non-Stop */
 188           0x88,         /* (bit7-4) SmartFanII: Fan1 Level 1 */
 189           0xE0,         /* (bit7-4) SmartFanII: Fan1 Level 2 */
 190           0xE0 },       /* (bit3-0) SmartFanII: Fan1 Level 3 */
 191         { 0x89,         /* (bit3-0) SmartFanII: Fan2 Non-Stop */
 192           0x89,         /* (bit7-4) SmartFanII: Fan2 Level 1 */
 193           0xE1,         /* (bit7-4) SmartFanII: Fan2 Level 2 */
 194           0xE1 },       /* (bit3-0) SmartFanII: Fan2 Level 3 */
 195         { 0x98,         /* (bit3-0) SmartFanII: Fan3 Non-Stop */
 196           0x98,         /* (bit7-4) SmartFanII: Fan3 Level 1 */
 197           0xE2,         /* (bit7-4) SmartFanII: Fan3 Level 2 */
 198           0xE2 }        /* (bit3-0) SmartFanII: Fan3 Level 3 */
 199 };
 200
 201 #define W83792D_REG_GPIO_EN             0x1A
 202 #define W83792D_REG_CONFIG              0x40
 203 #define W83792D_REG_VID_FANDIV          0x47
 204 #define W83792D_REG_CHIPID              0x49
 205 #define W83792D_REG_WCHIPID             0x58
 206 #define W83792D_REG_CHIPMAN             0x4F
 207 #define W83792D_REG_PIN                 0x4B
 208 #define W83792D_REG_I2C_SUBADDR         0x4A
 209
 210 #define W83792D_REG_ALARM1 0xA9         /* realtime status register1 */
 211 #define W83792D_REG_ALARM2 0xAA         /* realtime status register2 */
 212 #define W83792D_REG_ALARM3 0xAB         /* realtime status register3 */
 213 #define W83792D_REG_CHASSIS 0x42        /* Bit 5: Case Open status bit */
 214 #define W83792D_REG_CHASSIS_CLR 0x44    /* Bit 7: Case Open CLR_CHS/Reset bit */
 215
 216 /* control in0/in1 's limit modifiability */
 217 #define W83792D_REG_VID_IN_B            0x17
 218
 219 #define W83792D_REG_VBAT                0x5D
 220 #define W83792D_REG_I2C_ADDR            0x48
 221
 222 /*
 223  * Conversions. Rounding and limit checking is only done on the TO_REG
 224  * variants. Note that you should be a bit careful with which arguments
 225  * these macros are called: arguments may be evaluated more than once.
 226  * Fixing this is just not worth it.
 227  */
 228 #define IN_FROM_REG(nr, val) (((nr) <= 1) ? ((val) * 2) : \
 229                 ((((nr) == 6) || ((nr) == 7)) ? ((val) * 6) : ((val) * 4)))
 230 #define IN_TO_REG(nr, val) (((nr) <= 1) ? ((val) / 2) : \
 231                 ((((nr) == 6) || ((nr) == 7)) ? ((val) / 6) : ((val) / 4)))
 232
 233 static inline u8
 234 FAN_TO_REG(long rpm, int div)
 235 {
 236         if (rpm == 0)
 237                 return 255;
 238         rpm = clamp_val(rpm, 1, 1000000);
 239         return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
 240 }
 241
 242 #define FAN_FROM_REG(val, div)  ((val) == 0   ? -1 : \
 243                                 ((val) == 255 ? 0 : \
 244                                                 1350000 / ((val) * (div))))
 245
 246 /* for temp1 */
 247 #define TEMP1_TO_REG(val)       (clamp_val(((val) < 0 ? (val) + 0x100 * 1000 \
 248                                                       : (val)) / 1000, 0, 0xff))
 249 #define TEMP1_FROM_REG(val)     (((val) & 0x80 ? (val)-0x100 : (val)) * 1000)
 250 /* for temp2 and temp3, because they need additional resolution */
 251 #define TEMP_ADD_FROM_REG(val1, val2) \
 252         ((((val1) & 0x80 ? (val1)-0x100 \
 253                 : (val1)) * 1000) + ((val2 & 0x80) ? 500 : 0))
 254 #define TEMP_ADD_TO_REG_HIGH(val) \
 255         (clamp_val(((val) < 0 ? (val) + 0x100 * 1000 : (val)) / 1000, 0, 0xff))
 256 #define TEMP_ADD_TO_REG_LOW(val)        ((val%1000) ? 0x80 : 0x00)
 257
 258 #define DIV_FROM_REG(val)               (1 << (val))
 259
 260 static inline u8
 261 DIV_TO_REG(long val)
 262 {
 263         int i;
 264         val = clamp_val(val, 1, 128) >> 1;
 265         for (i = 0; i < 7; i++) {
 266                 if (val == 0)
 267                         break;
 268                 val >>= 1;
 269         }
 270         return (u8)i;
 271 }
 272
 273 struct w83792d_data {
 274         struct device *hwmon_dev;
 275
 276         struct mutex update_lock;
 277         char valid;             /* !=0 if following fields are valid */
 278         unsigned long last_updated;     /* In jiffies */
 279
 280         /* array of 2 pointers to subclients */
 281         struct i2c_client *lm75[2];
 282
 283         u8 in[9];               /* Register value */
 284         u8 in_max[9];           /* Register value */
 285         u8 in_min[9];           /* Register value */
 286         u16 low_bits;           /* Additional resolution to voltage in6-0 */
 287         u8 fan[7];              /* Register value */
 288         u8 fan_min[7];          /* Register value */
 289         u8 temp1[3];            /* current, over, thyst */
 290         u8 temp_add[2][6];      /* Register value */
 291         u8 fan_div[7];          /* Register encoding, shifted right */
 292         u8 pwm[7];              /*
 293                                  * We only consider the first 3 set of pwm,
 294                                  * although 792 chip has 7 set of pwm.
 295                                  */
 296         u8 pwmenable[3];
 297         u32 alarms;             /* realtime status register encoding,combined */
 298         u8 chassis;             /* Chassis status */
 299         u8 thermal_cruise[3];   /* Smart FanI: Fan1,2,3 target value */
 300         u8 tolerance[3];        /* Fan1,2,3 tolerance(Smart Fan I/II) */
 301         u8 sf2_points[3][4];    /* Smart FanII: Fan1,2,3 temperature points */
 302         u8 sf2_levels[3][4];    /* Smart FanII: Fan1,2,3 duty cycle levels */
 303 };
 304
 305 static int w83792d_probe(struct i2c_client *client,
 306                          const struct i2c_device_id *id);
 307 static int w83792d_detect(struct i2c_client *client,
 308                           struct i2c_board_info *info);
 309 static int w83792d_remove(struct i2c_client *client);
 310 static struct w83792d_data *w83792d_update_device(struct device *dev);
 311
 312 #ifdef DEBUG
 313 static void w83792d_print_debug(struct w83792d_data *data, struct device *dev);
 314 #endif
 315
 316 static void w83792d_init_client(struct i2c_client *client);
 317
 318 static const struct i2c_device_id w83792d_id[] = {
 319         { "w83792d", 0 },
 320         { }
 321 };
 322 MODULE_DEVICE_TABLE(i2c, w83792d_id);
 323
 324 static struct i2c_driver w83792d_driver = {
 325         .class          = I2C_CLASS_HWMON,
 326         .driver = {
 327                 .name = "w83792d",
 328         },
 329         .probe          = w83792d_probe,
 330         .remove         = w83792d_remove,
 331         .id_table       = w83792d_id,
 332         .detect         = w83792d_detect,
 333         .address_list   = normal_i2c,
 334 };
 335
 336 static inline long in_count_from_reg(int nr, struct w83792d_data *data)
 337 {
 338         /* in7 and in8 do not have low bits, but the formula still works */
 339         return (data->in[nr] << 2) | ((data->low_bits >> (2 * nr)) & 0x03);
 340 }
 341
 342 /*
 343  * The SMBus locks itself. The Winbond W83792D chip has a bank register,
 344  * but the driver only accesses registers in bank 0, so we don't have
 345  * to switch banks and lock access between switches.
 346  */
 347 static inline int w83792d_read_value(struct i2c_client *client, u8 reg)
 348 {
 349         return i2c_smbus_read_byte_data(client, reg);
 350 }
 351
 352 static inline int
 353 w83792d_write_value(struct i2c_client *client, u8 reg, u8 value)
 354 {
 355         return i2c_smbus_write_byte_data(client, reg, value);
 356 }
 357
 358 /* following are the sysfs callback functions */
 359 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
 360                         char *buf)
 361 {
 362         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 363         int nr = sensor_attr->index;
 364         struct w83792d_data *data = w83792d_update_device(dev);
 365         return sprintf(buf, "%ld\n",
 366                        IN_FROM_REG(nr, in_count_from_reg(nr, data)));
 367 }
 368
 369 #define show_in_reg(reg) \
 370 static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \
 371                         char *buf) \
 372 { \
 373         struct sensor_device_attribute *sensor_attr \
 374                 = to_sensor_dev_attr(attr); \
 375         int nr = sensor_attr->index; \
 376         struct w83792d_data *data = w83792d_update_device(dev); \
 377         return sprintf(buf, "%ld\n", \
 378                        (long)(IN_FROM_REG(nr, data->reg[nr]) * 4)); \
 379 }
 380
 381 show_in_reg(in_min);
 382 show_in_reg(in_max);
 383
 384 #define store_in_reg(REG, reg) \
 385 static ssize_t store_in_##reg(struct device *dev, \
 386                                 struct device_attribute *attr, \
 387                                 const char *buf, size_t count) \
 388 { \
 389         struct sensor_device_attribute *sensor_attr \
 390                         = to_sensor_dev_attr(attr); \
 391         int nr = sensor_attr->index; \
 392         struct i2c_client *client = to_i2c_client(dev); \
 393         struct w83792d_data *data = i2c_get_clientdata(client); \
 394         unsigned long val; \
 395         int err = kstrtoul(buf, 10, &val); \
 396         if (err) \
 397                 return err; \
 398         mutex_lock(&data->update_lock); \
 399         data->in_##reg[nr] = clamp_val(IN_TO_REG(nr, val) / 4, 0, 255); \
 400         w83792d_write_value(client, W83792D_REG_IN_##REG[nr], \
 401                             data->in_##reg[nr]); \
 402         mutex_unlock(&data->update_lock); \
 403          \
 404         return count; \
 405 }
 406 store_in_reg(MIN, min);
 407 store_in_reg(MAX, max);
 408
 409 #define show_fan_reg(reg) \
 410 static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \
 411                         char *buf) \
 412 { \
 413         struct sensor_device_attribute *sensor_attr \
 414                         = to_sensor_dev_attr(attr); \
 415         int nr = sensor_attr->index - 1; \
 416         struct w83792d_data *data = w83792d_update_device(dev); \
 417         return sprintf(buf, "%d\n", \
 418                 FAN_FROM_REG(data->reg[nr], DIV_FROM_REG(data->fan_div[nr]))); \
 419 }
 420
 421 show_fan_reg(fan);
 422 show_fan_reg(fan_min);
 423
 424 static ssize_t
 425 store_fan_min(struct device *dev, struct device_attribute *attr,
 426                 const char *buf, size_t count)
 427 {
 428         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 429         int nr = sensor_attr->index - 1;
 430         struct i2c_client *client = to_i2c_client(dev);
 431         struct w83792d_data *data = i2c_get_clientdata(client);
 432         unsigned long val;
 433         int err;
 434
 435         err = kstrtoul(buf, 10, &val);
 436         if (err)
 437                 return err;
 438
 439         mutex_lock(&data->update_lock);
 440         data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
 441         w83792d_write_value(client, W83792D_REG_FAN_MIN[nr],
 442                                 data->fan_min[nr]);
 443         mutex_unlock(&data->update_lock);
 444
 445         return count;
 446 }
 447
 448 static ssize_t
 449 show_fan_div(struct device *dev, struct device_attribute *attr,
 450                 char *buf)
 451 {
 452         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 453         int nr = sensor_attr->index;
 454         struct w83792d_data *data = w83792d_update_device(dev);
 455         return sprintf(buf, "%u\n", DIV_FROM_REG(data->fan_div[nr - 1]));
 456 }
 457
 458 /*
 459  * Note: we save and restore the fan minimum here, because its value is
 460  * determined in part by the fan divisor.  This follows the principle of
 461  * least surprise; the user doesn't expect the fan minimum to change just
 462  * because the divisor changed.
 463  */
 464 static ssize_t
 465 store_fan_div(struct device *dev, struct device_attribute *attr,
 466                 const char *buf, size_t count)
 467 {
 468         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 469         int nr = sensor_attr->index - 1;
 470         struct i2c_client *client = to_i2c_client(dev);
 471         struct w83792d_data *data = i2c_get_clientdata(client);
 472         unsigned long min;
 473         /*u8 reg;*/
 474         u8 fan_div_reg = 0;
 475         u8 tmp_fan_div;
 476         unsigned long val;
 477         int err;
 478
 479         err = kstrtoul(buf, 10, &val);
 480         if (err)
 481                 return err;
 482
 483         /* Save fan_min */
 484         mutex_lock(&data->update_lock);
 485         min = FAN_FROM_REG(data->fan_min[nr],
 486                            DIV_FROM_REG(data->fan_div[nr]));
 487
 488         data->fan_div[nr] = DIV_TO_REG(val);
 489
 490         fan_div_reg = w83792d_read_value(client, W83792D_REG_FAN_DIV[nr >> 1]);
 491         fan_div_reg &= (nr & 0x01) ? 0x8f : 0xf8;
 492         tmp_fan_div = (nr & 0x01) ? (((data->fan_div[nr]) << 4) & 0x70)
 493                                         : ((data->fan_div[nr]) & 0x07);
 494         w83792d_write_value(client, W83792D_REG_FAN_DIV[nr >> 1],
 495                                         fan_div_reg | tmp_fan_div);
 496
 497         /* Restore fan_min */
 498         data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
 499         w83792d_write_value(client, W83792D_REG_FAN_MIN[nr], data->fan_min[nr]);
 500         mutex_unlock(&data->update_lock);
 501
 502         return count;
 503 }
 504
 505 /* read/write the temperature1, includes measured value and limits */
 506
 507 static ssize_t show_temp1(struct device *dev, struct device_attribute *attr,
 508                                 char *buf)
 509 {
 510         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 511         int nr = sensor_attr->index;
 512         struct w83792d_data *data = w83792d_update_device(dev);
 513         return sprintf(buf, "%d\n", TEMP1_FROM_REG(data->temp1[nr]));
 514 }
 515
 516 static ssize_t store_temp1(struct device *dev, struct device_attribute *attr,
 517                                 const char *buf, size_t count)
 518 {
 519         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 520         int nr = sensor_attr->index;
 521         struct i2c_client *client = to_i2c_client(dev);
 522         struct w83792d_data *data = i2c_get_clientdata(client);
 523         long val;
 524         int err;
 525
 526         err = kstrtol(buf, 10, &val);
 527         if (err)
 528                 return err;
 529
 530         mutex_lock(&data->update_lock);
 531         data->temp1[nr] = TEMP1_TO_REG(val);
 532         w83792d_write_value(client, W83792D_REG_TEMP1[nr],
 533                 data->temp1[nr]);
 534         mutex_unlock(&data->update_lock);
 535
 536         return count;
 537 }
 538
 539 /* read/write the temperature2-3, includes measured value and limits */
 540
 541 static ssize_t show_temp23(struct device *dev, struct device_attribute *attr,
 542                                 char *buf)
 543 {
 544         struct sensor_device_attribute_2 *sensor_attr
 545           = to_sensor_dev_attr_2(attr);
 546         int nr = sensor_attr->nr;
 547         int index = sensor_attr->index;
 548         struct w83792d_data *data = w83792d_update_device(dev);
 549         return sprintf(buf, "%ld\n",
 550                 (long)TEMP_ADD_FROM_REG(data->temp_add[nr][index],
 551                         data->temp_add[nr][index+1]));
 552 }
 553
 554 static ssize_t store_temp23(struct device *dev, struct device_attribute *attr,
 555                                 const char *buf, size_t count)
 556 {
 557         struct sensor_device_attribute_2 *sensor_attr
 558           = to_sensor_dev_attr_2(attr);
 559         int nr = sensor_attr->nr;
 560         int index = sensor_attr->index;
 561         struct i2c_client *client = to_i2c_client(dev);
 562         struct w83792d_data *data = i2c_get_clientdata(client);
 563         long val;
 564         int err;
 565
 566         err = kstrtol(buf, 10, &val);
 567         if (err)
 568                 return err;
 569
 570         mutex_lock(&data->update_lock);
 571         data->temp_add[nr][index] = TEMP_ADD_TO_REG_HIGH(val);
 572         data->temp_add[nr][index+1] = TEMP_ADD_TO_REG_LOW(val);
 573         w83792d_write_value(client, W83792D_REG_TEMP_ADD[nr][index],
 574                 data->temp_add[nr][index]);
 575         w83792d_write_value(client, W83792D_REG_TEMP_ADD[nr][index+1],
 576                 data->temp_add[nr][index+1]);
 577         mutex_unlock(&data->update_lock);
 578
 579         return count;
 580 }
 581
 582 /* get reatime status of all sensors items: voltage, temp, fan */
 583 static ssize_t
 584 show_alarms_reg(struct device *dev, struct device_attribute *attr, char *buf)
 585 {
 586         struct w83792d_data *data = w83792d_update_device(dev);
 587         return sprintf(buf, "%d\n", data->alarms);
 588 }
 589
 590 static ssize_t show_alarm(struct device *dev,
 591                           struct device_attribute *attr, char *buf)
 592 {
 593         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 594         int nr = sensor_attr->index;
 595         struct w83792d_data *data = w83792d_update_device(dev);
 596         return sprintf(buf, "%d\n", (data->alarms >> nr) & 1);
 597 }
 598
 599 static ssize_t
 600 show_pwm(struct device *dev, struct device_attribute *attr,
 601                 char *buf)
 602 {
 603         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 604         int nr = sensor_attr->index;
 605         struct w83792d_data *data = w83792d_update_device(dev);
 606         return sprintf(buf, "%d\n", (data->pwm[nr] & 0x0f) << 4);
 607 }
 608
 609 static ssize_t
 610 show_pwmenable(struct device *dev, struct device_attribute *attr,
 611                         char *buf)
 612 {
 613         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 614         int nr = sensor_attr->index - 1;
 615         struct w83792d_data *data = w83792d_update_device(dev);
 616         long pwm_enable_tmp = 1;
 617
 618         switch (data->pwmenable[nr]) {
 619         case 0:
 620                 pwm_enable_tmp = 1; /* manual mode */
 621                 break;
 622         case 1:
 623                 pwm_enable_tmp = 3; /*thermal cruise/Smart Fan I */
 624                 break;
 625         case 2:
 626                 pwm_enable_tmp = 2; /* Smart Fan II */
 627                 break;
 628         }
 629
 630         return sprintf(buf, "%ld\n", pwm_enable_tmp);
 631 }
 632
 633 static ssize_t
 634 store_pwm(struct device *dev, struct device_attribute *attr,
 635                 const char *buf, size_t count)
 636 {
 637         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 638         int nr = sensor_attr->index;
 639         struct i2c_client *client = to_i2c_client(dev);
 640         struct w83792d_data *data = i2c_get_clientdata(client);
 641         unsigned long val;
 642         int err;
 643
 644         err = kstrtoul(buf, 10, &val);
 645         if (err)
 646                 return err;
 647         val = clamp_val(val, 0, 255) >> 4;
 648
 649         mutex_lock(&data->update_lock);
 650         val |= w83792d_read_value(client, W83792D_REG_PWM[nr]) & 0xf0;
 651         data->pwm[nr] = val;
 652         w83792d_write_value(client, W83792D_REG_PWM[nr], data->pwm[nr]);
 653         mutex_unlock(&data->update_lock);
 654
 655         return count;
 656 }
 657
 658 static ssize_t
 659 store_pwmenable(struct device *dev, struct device_attribute *attr,
 660                         const char *buf, size_t count)
 661 {
 662         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 663         int nr = sensor_attr->index - 1;
 664         struct i2c_client *client = to_i2c_client(dev);
 665         struct w83792d_data *data = i2c_get_clientdata(client);
 666         u8 fan_cfg_tmp, cfg1_tmp, cfg2_tmp, cfg3_tmp, cfg4_tmp;
 667         unsigned long val;
 668         int err;
 669
 670         err = kstrtoul(buf, 10, &val);
 671         if (err)
 672                 return err;
 673
 674         if (val < 1 || val > 3)
 675                 return -EINVAL;
 676
 677         mutex_lock(&data->update_lock);
 678         switch (val) {
 679         case 1:
 680                 data->pwmenable[nr] = 0; /* manual mode */
 681                 break;
 682         case 2:
 683                 data->pwmenable[nr] = 2; /* Smart Fan II */
 684                 break;
 685         case 3:
 686                 data->pwmenable[nr] = 1; /* thermal cruise/Smart Fan I */
 687                 break;
 688         }
 689         cfg1_tmp = data->pwmenable[0];
 690         cfg2_tmp = (data->pwmenable[1]) << 2;
 691         cfg3_tmp = (data->pwmenable[2]) << 4;
 692         cfg4_tmp = w83792d_read_value(client, W83792D_REG_FAN_CFG) & 0xc0;
 693         fan_cfg_tmp = ((cfg4_tmp | cfg3_tmp) | cfg2_tmp) | cfg1_tmp;
 694         w83792d_write_value(client, W83792D_REG_FAN_CFG, fan_cfg_tmp);
 695         mutex_unlock(&data->update_lock);
 696
 697         return count;
 698 }
 699
 700 static ssize_t
 701 show_pwm_mode(struct device *dev, struct device_attribute *attr,
 702                         char *buf)
 703 {
 704         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 705         int nr = sensor_attr->index;
 706         struct w83792d_data *data = w83792d_update_device(dev);
 707         return sprintf(buf, "%d\n", data->pwm[nr] >> 7);
 708 }
 709
 710 static ssize_t
 711 store_pwm_mode(struct device *dev, struct device_attribute *attr,
 712                         const char *buf, size_t count)
 713 {
 714         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 715         int nr = sensor_attr->index;
 716         struct i2c_client *client = to_i2c_client(dev);
 717         struct w83792d_data *data = i2c_get_clientdata(client);
 718         unsigned long val;
 719         int err;
 720
 721         err = kstrtoul(buf, 10, &val);
 722         if (err)
 723                 return err;
 724         if (val > 1)
 725                 return -EINVAL;
 726
 727         mutex_lock(&data->update_lock);
 728         data->pwm[nr] = w83792d_read_value(client, W83792D_REG_PWM[nr]);
 729         if (val) {                      /* PWM mode */
 730                 data->pwm[nr] |= 0x80;
 731         } else {                        /* DC mode */
 732                 data->pwm[nr] &= 0x7f;
 733         }
 734         w83792d_write_value(client, W83792D_REG_PWM[nr], data->pwm[nr]);
 735         mutex_unlock(&data->update_lock);
 736
 737         return count;
 738 }
 739
 740 static ssize_t
 741 show_chassis_clear(struct device *dev, struct device_attribute *attr,
 742                         char *buf)
 743 {
 744         struct w83792d_data *data = w83792d_update_device(dev);
 745         return sprintf(buf, "%d\n", data->chassis);
 746 }
 747
 748 static ssize_t
 749 store_chassis_clear(struct device *dev, struct device_attribute *attr,
 750                         const char *buf, size_t count)
 751 {
 752         struct i2c_client *client = to_i2c_client(dev);
 753         struct w83792d_data *data = i2c_get_clientdata(client);
 754         unsigned long val;
 755         u8 reg;
 756
 757         if (kstrtoul(buf, 10, &val) || val != 0)
 758                 return -EINVAL;
 759
 760         mutex_lock(&data->update_lock);
 761         reg = w83792d_read_value(client, W83792D_REG_CHASSIS_CLR);
 762         w83792d_write_value(client, W83792D_REG_CHASSIS_CLR, reg | 0x80);
 763         data->valid = 0;                /* Force cache refresh */
 764         mutex_unlock(&data->update_lock);
 765
 766         return count;
 767 }
 768
 769 /* For Smart Fan I / Thermal Cruise */
 770 static ssize_t
 771 show_thermal_cruise(struct device *dev, struct device_attribute *attr,
 772                         char *buf)
 773 {
 774         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 775         int nr = sensor_attr->index;
 776         struct w83792d_data *data = w83792d_update_device(dev);
 777         return sprintf(buf, "%ld\n", (long)data->thermal_cruise[nr-1]);
 778 }
 779
 780 static ssize_t
 781 store_thermal_cruise(struct device *dev, struct device_attribute *attr,
 782                         const char *buf, size_t count)
 783 {
 784         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 785         int nr = sensor_attr->index - 1;
 786         struct i2c_client *client = to_i2c_client(dev);
 787         struct w83792d_data *data = i2c_get_clientdata(client);
 788         u8 target_tmp = 0, target_mask = 0;
 789         unsigned long val;
 790         int err;
 791
 792         err = kstrtoul(buf, 10, &val);
 793         if (err)
 794                 return err;
 795
 796         target_tmp = val;
 797         target_tmp = target_tmp & 0x7f;
 798         mutex_lock(&data->update_lock);
 799         target_mask = w83792d_read_value(client,
 800                                          W83792D_REG_THERMAL[nr]) & 0x80;
 801         data->thermal_cruise[nr] = clamp_val(target_tmp, 0, 255);
 802         w83792d_write_value(client, W83792D_REG_THERMAL[nr],
 803                 (data->thermal_cruise[nr]) | target_mask);
 804         mutex_unlock(&data->update_lock);
 805
 806         return count;
 807 }
 808
 809 /* For Smart Fan I/Thermal Cruise and Smart Fan II */
 810 static ssize_t
 811 show_tolerance(struct device *dev, struct device_attribute *attr,
 812                 char *buf)
 813 {
 814         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 815         int nr = sensor_attr->index;
 816         struct w83792d_data *data = w83792d_update_device(dev);
 817         return sprintf(buf, "%ld\n", (long)data->tolerance[nr-1]);
 818 }
 819
 820 static ssize_t
 821 store_tolerance(struct device *dev, struct device_attribute *attr,
 822                 const char *buf, size_t count)
 823 {
 824         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 825         int nr = sensor_attr->index - 1;
 826         struct i2c_client *client = to_i2c_client(dev);
 827         struct w83792d_data *data = i2c_get_clientdata(client);
 828         u8 tol_tmp, tol_mask;
 829         unsigned long val;
 830         int err;
 831
 832         err = kstrtoul(buf, 10, &val);
 833         if (err)
 834                 return err;
 835
 836         mutex_lock(&data->update_lock);
 837         tol_mask = w83792d_read_value(client,
 838                 W83792D_REG_TOLERANCE[nr]) & ((nr == 1) ? 0x0f : 0xf0);
 839         tol_tmp = clamp_val(val, 0, 15);
 840         tol_tmp &= 0x0f;
 841         data->tolerance[nr] = tol_tmp;
 842         if (nr == 1)
 843                 tol_tmp <<= 4;
 844         w83792d_write_value(client, W83792D_REG_TOLERANCE[nr],
 845                 tol_mask | tol_tmp);
 846         mutex_unlock(&data->update_lock);
 847
 848         return count;
 849 }
 850
 851 /* For Smart Fan II */
 852 static ssize_t
 853 show_sf2_point(struct device *dev, struct device_attribute *attr,
 854                 char *buf)
 855 {
 856         struct sensor_device_attribute_2 *sensor_attr
 857           = to_sensor_dev_attr_2(attr);
 858         int nr = sensor_attr->nr;
 859         int index = sensor_attr->index;
 860         struct w83792d_data *data = w83792d_update_device(dev);
 861         return sprintf(buf, "%ld\n", (long)data->sf2_points[index-1][nr-1]);
 862 }
 863
 864 static ssize_t
 865 store_sf2_point(struct device *dev, struct device_attribute *attr,
 866                 const char *buf, size_t count)
 867 {
 868         struct sensor_device_attribute_2 *sensor_attr
 869           = to_sensor_dev_attr_2(attr);
 870         int nr = sensor_attr->nr - 1;
 871         int index = sensor_attr->index - 1;
 872         struct i2c_client *client = to_i2c_client(dev);
 873         struct w83792d_data *data = i2c_get_clientdata(client);
 874         u8 mask_tmp = 0;
 875         unsigned long val;
 876         int err;
 877
 878         err = kstrtoul(buf, 10, &val);
 879         if (err)
 880                 return err;
 881
 882         mutex_lock(&data->update_lock);
 883         data->sf2_points[index][nr] = clamp_val(val, 0, 127);
 884         mask_tmp = w83792d_read_value(client,
 885                                         W83792D_REG_POINTS[index][nr]) & 0x80;
 886         w83792d_write_value(client, W83792D_REG_POINTS[index][nr],
 887                 mask_tmp|data->sf2_points[index][nr]);
 888         mutex_unlock(&data->update_lock);
 889
 890         return count;
 891 }
 892
 893 static ssize_t
 894 show_sf2_level(struct device *dev, struct device_attribute *attr,
 895                 char *buf)
 896 {
 897         struct sensor_device_attribute_2 *sensor_attr
 898           = to_sensor_dev_attr_2(attr);
 899         int nr = sensor_attr->nr;
 900         int index = sensor_attr->index;
 901         struct w83792d_data *data = w83792d_update_device(dev);
 902         return sprintf(buf, "%d\n",
 903                         (((data->sf2_levels[index-1][nr]) * 100) / 15));
 904 }
 905
 906 static ssize_t
 907 store_sf2_level(struct device *dev, struct device_attribute *attr,
 908                 const char *buf, size_t count)
 909 {
 910         struct sensor_device_attribute_2 *sensor_attr
 911           = to_sensor_dev_attr_2(attr);
 912         int nr = sensor_attr->nr;
 913         int index = sensor_attr->index - 1;
 914         struct i2c_client *client = to_i2c_client(dev);
 915         struct w83792d_data *data = i2c_get_clientdata(client);
 916         u8 mask_tmp = 0, level_tmp = 0;
 917         unsigned long val;
 918         int err;
 919
 920         err = kstrtoul(buf, 10, &val);
 921         if (err)
 922                 return err;
 923
 924         mutex_lock(&data->update_lock);
 925         data->sf2_levels[index][nr] = clamp_val((val * 15) / 100, 0, 15);
 926         mask_tmp = w83792d_read_value(client, W83792D_REG_LEVELS[index][nr])
 927                 & ((nr == 3) ? 0xf0 : 0x0f);
 928         if (nr == 3)
 929                 level_tmp = data->sf2_levels[index][nr];
 930         else
 931                 level_tmp = data->sf2_levels[index][nr] << 4;
 932         w83792d_write_value(client, W83792D_REG_LEVELS[index][nr],
 933                             level_tmp | mask_tmp);
 934         mutex_unlock(&data->update_lock);
 935
 936         return count;
 937 }
 938
 939
 940 static int
 941 w83792d_detect_subclients(struct i2c_client *new_client)
 942 {
 943         int i, id, err;
 944         int address = new_client->addr;
 945         u8 val;
 946         struct i2c_adapter *adapter = new_client->adapter;
 947         struct w83792d_data *data = i2c_get_clientdata(new_client);
 948
 949         id = i2c_adapter_id(adapter);
 950         if (force_subclients[0] == id && force_subclients[1] == address) {
 951                 for (i = 2; i <= 3; i++) {
 952                         if (force_subclients[i] < 0x48 ||
 953                             force_subclients[i] > 0x4f) {
 954                                 dev_err(&new_client->dev,
 955                                         "invalid subclient address %d; must be 0x48-0x4f\n",
 956                                         force_subclients[i]);
 957                                 err = -ENODEV;
 958                                 goto ERROR_SC_0;
 959                         }
 960                 }
 961                 w83792d_write_value(new_client, W83792D_REG_I2C_SUBADDR,
 962                                         (force_subclients[2] & 0x07) |
 963                                         ((force_subclients[3] & 0x07) << 4));
 964         }
 965
 966         val = w83792d_read_value(new_client, W83792D_REG_I2C_SUBADDR);
 967         if (!(val & 0x08))
 968                 data->lm75[0] = i2c_new_dummy(adapter, 0x48 + (val & 0x7));
 969         if (!(val & 0x80)) {
 970                 if ((data->lm75[0] != NULL) &&
 971                         ((val & 0x7) == ((val >> 4) & 0x7))) {
 972                         dev_err(&new_client->dev,
 973                                 "duplicate addresses 0x%x, use force_subclient\n",
 974                                 data->lm75[0]->addr);
 975                         err = -ENODEV;
 976                         goto ERROR_SC_1;
 977                 }
 978                 data->lm75[1] = i2c_new_dummy(adapter,
 979                                               0x48 + ((val >> 4) & 0x7));
 980         }
 981
 982         return 0;
 983
 984 /* Undo inits in case of errors */
 985
 986 ERROR_SC_1:
 987         if (data->lm75[0] != NULL)
 988                 i2c_unregister_device(data->lm75[0]);
 989 ERROR_SC_0:
 990         return err;
 991 }
 992
 993 static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_in, NULL, 0);
 994 static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in, NULL, 1);
 995 static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in, NULL, 2);
 996 static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in, NULL, 3);
 997 static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, show_in, NULL, 4);
 998 static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, show_in, NULL, 5);
 999 static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, show_in, NULL, 6);
1000 static SENSOR_DEVICE_ATTR(in7_input, S_IRUGO, show_in, NULL, 7);
1001 static SENSOR_DEVICE_ATTR(in8_input, S_IRUGO, show_in, NULL, 8);
1002 static SENSOR_DEVICE_ATTR(in0_min, S_IWUSR | S_IRUGO,
1003                         show_in_min, store_in_min, 0);
1004 static SENSOR_DEVICE_ATTR(in1_min, S_IWUSR | S_IRUGO,
1005                         show_in_min, store_in_min, 1);
1006 static SENSOR_DEVICE_ATTR(in2_min, S_IWUSR | S_IRUGO,
1007                         show_in_min, store_in_min, 2);
1008 static SENSOR_DEVICE_ATTR(in3_min, S_IWUSR | S_IRUGO,
1009                         show_in_min, store_in_min, 3);
1010 static SENSOR_DEVICE_ATTR(in4_min, S_IWUSR | S_IRUGO,
1011                         show_in_min, store_in_min, 4);
1012 static SENSOR_DEVICE_ATTR(in5_min, S_IWUSR | S_IRUGO,
1013                         show_in_min, store_in_min, 5);
1014 static SENSOR_DEVICE_ATTR(in6_min, S_IWUSR | S_IRUGO,
1015                         show_in_min, store_in_min, 6);
1016 static SENSOR_DEVICE_ATTR(in7_min, S_IWUSR | S_IRUGO,
1017                         show_in_min, store_in_min, 7);
1018 static SENSOR_DEVICE_ATTR(in8_min, S_IWUSR | S_IRUGO,
1019                         show_in_min, store_in_min, 8);
1020 static SENSOR_DEVICE_ATTR(in0_max, S_IWUSR | S_IRUGO,
1021                         show_in_max, store_in_max, 0);
1022 static SENSOR_DEVICE_ATTR(in1_max, S_IWUSR | S_IRUGO,
1023                         show_in_max, store_in_max, 1);
1024 static SENSOR_DEVICE_ATTR(in2_max, S_IWUSR | S_IRUGO,
1025                         show_in_max, store_in_max, 2);
1026 static SENSOR_DEVICE_ATTR(in3_max, S_IWUSR | S_IRUGO,
1027                         show_in_max, store_in_max, 3);
1028 static SENSOR_DEVICE_ATTR(in4_max, S_IWUSR | S_IRUGO,
1029                         show_in_max, store_in_max, 4);
1030 static SENSOR_DEVICE_ATTR(in5_max, S_IWUSR | S_IRUGO,
1031                         show_in_max, store_in_max, 5);
1032 static SENSOR_DEVICE_ATTR(in6_max, S_IWUSR | S_IRUGO,
1033                         show_in_max, store_in_max, 6);
1034 static SENSOR_DEVICE_ATTR(in7_max, S_IWUSR | S_IRUGO,
1035                         show_in_max, store_in_max, 7);
1036 static SENSOR_DEVICE_ATTR(in8_max, S_IWUSR | S_IRUGO,
1037                         show_in_max, store_in_max, 8);
1038 static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp1, NULL, 0, 0);
1039 static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp23, NULL, 0, 0);
1040 static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp23, NULL, 1, 0);
1041 static SENSOR_DEVICE_ATTR_2(temp1_max, S_IRUGO | S_IWUSR,
1042                         show_temp1, store_temp1, 0, 1);
1043 static SENSOR_DEVICE_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, show_temp23,
1044                         store_temp23, 0, 2);
1045 static SENSOR_DEVICE_ATTR_2(temp3_max, S_IRUGO | S_IWUSR, show_temp23,
1046                         store_temp23, 1, 2);
1047 static SENSOR_DEVICE_ATTR_2(temp1_max_hyst, S_IRUGO | S_IWUSR,
1048                         show_temp1, store_temp1, 0, 2);
1049 static SENSOR_DEVICE_ATTR_2(temp2_max_hyst, S_IRUGO | S_IWUSR,
1050                         show_temp23, store_temp23, 0, 4);
1051 static SENSOR_DEVICE_ATTR_2(temp3_max_hyst, S_IRUGO | S_IWUSR,
1052                         show_temp23, store_temp23, 1, 4);
1053 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms_reg, NULL);
1054 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
1055 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
1056 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 2);
1057 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 3);
1058 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 4);
1059 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 5);
1060 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 6);
1061 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 7);
1062 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 8);
1063 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 9);
1064 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 10);
1065 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 11);
1066 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 12);
1067 static SENSOR_DEVICE_ATTR(fan7_alarm, S_IRUGO, show_alarm, NULL, 15);
1068 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 19);
1069 static SENSOR_DEVICE_ATTR(in8_alarm, S_IRUGO, show_alarm, NULL, 20);
1070 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 21);
1071 static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 22);
1072 static SENSOR_DEVICE_ATTR(fan6_alarm, S_IRUGO, show_alarm, NULL, 23);
1073 static DEVICE_ATTR(intrusion0_alarm, S_IRUGO | S_IWUSR,
1074                         show_chassis_clear, store_chassis_clear);
1075 static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 0);
1076 static SENSOR_DEVICE_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 1);
1077 static SENSOR_DEVICE_ATTR(pwm3, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 2);
1078 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
1079                         show_pwmenable, store_pwmenable, 1);
1080 static SENSOR_DEVICE_ATTR(pwm2_enable, S_IWUSR | S_IRUGO,
1081                         show_pwmenable, store_pwmenable, 2);
1082 static SENSOR_DEVICE_ATTR(pwm3_enable, S_IWUSR | S_IRUGO,
1083                         show_pwmenable, store_pwmenable, 3);
1084 static SENSOR_DEVICE_ATTR(pwm1_mode, S_IWUSR | S_IRUGO,
1085                         show_pwm_mode, store_pwm_mode, 0);
1086 static SENSOR_DEVICE_ATTR(pwm2_mode, S_IWUSR | S_IRUGO,
1087                         show_pwm_mode, store_pwm_mode, 1);
1088 static SENSOR_DEVICE_ATTR(pwm3_mode, S_IWUSR | S_IRUGO,
1089                         show_pwm_mode, store_pwm_mode, 2);
1090 static SENSOR_DEVICE_ATTR(tolerance1, S_IWUSR | S_IRUGO,
1091                         show_tolerance, store_tolerance, 1);
1092 static SENSOR_DEVICE_ATTR(tolerance2, S_IWUSR | S_IRUGO,
1093                         show_tolerance, store_tolerance, 2);
1094 static SENSOR_DEVICE_ATTR(tolerance3, S_IWUSR | S_IRUGO,
1095                         show_tolerance, store_tolerance, 3);
1096 static SENSOR_DEVICE_ATTR(thermal_cruise1, S_IWUSR | S_IRUGO,
1097                         show_thermal_cruise, store_thermal_cruise, 1);
1098 static SENSOR_DEVICE_ATTR(thermal_cruise2, S_IWUSR | S_IRUGO,
1099                         show_thermal_cruise, store_thermal_cruise, 2);
1100 static SENSOR_DEVICE_ATTR(thermal_cruise3, S_IWUSR | S_IRUGO,
1101                         show_thermal_cruise, store_thermal_cruise, 3);
1102 static SENSOR_DEVICE_ATTR_2(sf2_point1_fan1, S_IRUGO | S_IWUSR,
1103                         show_sf2_point, store_sf2_point, 1, 1);
1104 static SENSOR_DEVICE_ATTR_2(sf2_point2_fan1, S_IRUGO | S_IWUSR,
1105                         show_sf2_point, store_sf2_point, 2, 1);
1106 static SENSOR_DEVICE_ATTR_2(sf2_point3_fan1, S_IRUGO | S_IWUSR,
1107                         show_sf2_point, store_sf2_point, 3, 1);
1108 static SENSOR_DEVICE_ATTR_2(sf2_point4_fan1, S_IRUGO | S_IWUSR,
1109                         show_sf2_point, store_sf2_point, 4, 1);
1110 static SENSOR_DEVICE_ATTR_2(sf2_point1_fan2, S_IRUGO | S_IWUSR,
1111                         show_sf2_point, store_sf2_point, 1, 2);
1112 static SENSOR_DEVICE_ATTR_2(sf2_point2_fan2, S_IRUGO | S_IWUSR,
1113                         show_sf2_point, store_sf2_point, 2, 2);
1114 static SENSOR_DEVICE_ATTR_2(sf2_point3_fan2, S_IRUGO | S_IWUSR,
1115                         show_sf2_point, store_sf2_point, 3, 2);
1116 static SENSOR_DEVICE_ATTR_2(sf2_point4_fan2, S_IRUGO | S_IWUSR,
1117                         show_sf2_point, store_sf2_point, 4, 2);
1118 static SENSOR_DEVICE_ATTR_2(sf2_point1_fan3, S_IRUGO | S_IWUSR,
1119                         show_sf2_point, store_sf2_point, 1, 3);
1120 static SENSOR_DEVICE_ATTR_2(sf2_point2_fan3, S_IRUGO | S_IWUSR,
1121                         show_sf2_point, store_sf2_point, 2, 3);
1122 static SENSOR_DEVICE_ATTR_2(sf2_point3_fan3, S_IRUGO | S_IWUSR,
1123                         show_sf2_point, store_sf2_point, 3, 3);
1124 static SENSOR_DEVICE_ATTR_2(sf2_point4_fan3, S_IRUGO | S_IWUSR,
1125                         show_sf2_point, store_sf2_point, 4, 3);
1126 static SENSOR_DEVICE_ATTR_2(sf2_level1_fan1, S_IRUGO | S_IWUSR,
1127                         show_sf2_level, store_sf2_level, 1, 1);
1128 static SENSOR_DEVICE_ATTR_2(sf2_level2_fan1, S_IRUGO | S_IWUSR,
1129                         show_sf2_level, store_sf2_level, 2, 1);
1130 static SENSOR_DEVICE_ATTR_2(sf2_level3_fan1, S_IRUGO | S_IWUSR,
1131                         show_sf2_level, store_sf2_level, 3, 1);
1132 static SENSOR_DEVICE_ATTR_2(sf2_level1_fan2, S_IRUGO | S_IWUSR,
1133                         show_sf2_level, store_sf2_level, 1, 2);
1134 static SENSOR_DEVICE_ATTR_2(sf2_level2_fan2, S_IRUGO | S_IWUSR,
1135                         show_sf2_level, store_sf2_level, 2, 2);
1136 static SENSOR_DEVICE_ATTR_2(sf2_level3_fan2, S_IRUGO | S_IWUSR,
1137                         show_sf2_level, store_sf2_level, 3, 2);
1138 static SENSOR_DEVICE_ATTR_2(sf2_level1_fan3, S_IRUGO | S_IWUSR,
1139                         show_sf2_level, store_sf2_level, 1, 3);
1140 static SENSOR_DEVICE_ATTR_2(sf2_level2_fan3, S_IRUGO | S_IWUSR,
1141                         show_sf2_level, store_sf2_level, 2, 3);
1142 static SENSOR_DEVICE_ATTR_2(sf2_level3_fan3, S_IRUGO | S_IWUSR,
1143                         show_sf2_level, store_sf2_level, 3, 3);
1144 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 1);
1145 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 2);
1146 static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 3);
1147 static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 4);
1148 static SENSOR_DEVICE_ATTR(fan5_input, S_IRUGO, show_fan, NULL, 5);
1149 static SENSOR_DEVICE_ATTR(fan6_input, S_IRUGO, show_fan, NULL, 6);
1150 static SENSOR_DEVICE_ATTR(fan7_input, S_IRUGO, show_fan, NULL, 7);
1151 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO,
1152                         show_fan_min, store_fan_min, 1);
1153 static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO,
1154                         show_fan_min, store_fan_min, 2);
1155 static SENSOR_DEVICE_ATTR(fan3_min, S_IWUSR | S_IRUGO,
1156                         show_fan_min, store_fan_min, 3);
1157 static SENSOR_DEVICE_ATTR(fan4_min, S_IWUSR | S_IRUGO,
1158                         show_fan_min, store_fan_min, 4);
1159 static SENSOR_DEVICE_ATTR(fan5_min, S_IWUSR | S_IRUGO,
1160                         show_fan_min, store_fan_min, 5);
1161 static SENSOR_DEVICE_ATTR(fan6_min, S_IWUSR | S_IRUGO,
1162                         show_fan_min, store_fan_min, 6);
1163 static SENSOR_DEVICE_ATTR(fan7_min, S_IWUSR | S_IRUGO,
1164                         show_fan_min, store_fan_min, 7);
1165 static SENSOR_DEVICE_ATTR(fan1_div, S_IWUSR | S_IRUGO,
1166                         show_fan_div, store_fan_div, 1);
1167 static SENSOR_DEVICE_ATTR(fan2_div, S_IWUSR | S_IRUGO,
1168                         show_fan_div, store_fan_div, 2);
1169 static SENSOR_DEVICE_ATTR(fan3_div, S_IWUSR | S_IRUGO,
1170                         show_fan_div, store_fan_div, 3);
1171 static SENSOR_DEVICE_ATTR(fan4_div, S_IWUSR | S_IRUGO,
1172                         show_fan_div, store_fan_div, 4);
1173 static SENSOR_DEVICE_ATTR(fan5_div, S_IWUSR | S_IRUGO,
1174                         show_fan_div, store_fan_div, 5);
1175 static SENSOR_DEVICE_ATTR(fan6_div, S_IWUSR | S_IRUGO,
1176                         show_fan_div, store_fan_div, 6);
1177 static SENSOR_DEVICE_ATTR(fan7_div, S_IWUSR | S_IRUGO,
1178                         show_fan_div, store_fan_div, 7);
1179
1180 static struct attribute *w83792d_attributes_fan[4][5] = {
1181         {
1182                 &sensor_dev_attr_fan4_input.dev_attr.attr,
1183                 &sensor_dev_attr_fan4_min.dev_attr.attr,
1184                 &sensor_dev_attr_fan4_div.dev_attr.attr,
1185                 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1186                 NULL
1187         }, {
1188                 &sensor_dev_attr_fan5_input.dev_attr.attr,
1189                 &sensor_dev_attr_fan5_min.dev_attr.attr,
1190                 &sensor_dev_attr_fan5_div.dev_attr.attr,
1191                 &sensor_dev_attr_fan5_alarm.dev_attr.attr,
1192                 NULL
1193         }, {
1194                 &sensor_dev_attr_fan6_input.dev_attr.attr,
1195                 &sensor_dev_attr_fan6_min.dev_attr.attr,
1196                 &sensor_dev_attr_fan6_div.dev_attr.attr,
1197                 &sensor_dev_attr_fan6_alarm.dev_attr.attr,
1198                 NULL
1199         }, {
1200                 &sensor_dev_attr_fan7_input.dev_attr.attr,
1201                 &sensor_dev_attr_fan7_min.dev_attr.attr,
1202                 &sensor_dev_attr_fan7_div.dev_attr.attr,
1203                 &sensor_dev_attr_fan7_alarm.dev_attr.attr,
1204                 NULL
1205         }
1206 };
1207
1208 static const struct attribute_group w83792d_group_fan[4] = {
1209         { .attrs = w83792d_attributes_fan[0] },
1210         { .attrs = w83792d_attributes_fan[1] },
1211         { .attrs = w83792d_attributes_fan[2] },
1212         { .attrs = w83792d_attributes_fan[3] },
1213 };
1214
1215 static struct attribute *w83792d_attributes[] = {
1216         &sensor_dev_attr_in0_input.dev_attr.attr,
1217         &sensor_dev_attr_in0_max.dev_attr.attr,
1218         &sensor_dev_attr_in0_min.dev_attr.attr,
1219         &sensor_dev_attr_in1_input.dev_attr.attr,
1220         &sensor_dev_attr_in1_max.dev_attr.attr,
1221         &sensor_dev_attr_in1_min.dev_attr.attr,
1222         &sensor_dev_attr_in2_input.dev_attr.attr,
1223         &sensor_dev_attr_in2_max.dev_attr.attr,
1224         &sensor_dev_attr_in2_min.dev_attr.attr,
1225         &sensor_dev_attr_in3_input.dev_attr.attr,
1226         &sensor_dev_attr_in3_max.dev_attr.attr,
1227         &sensor_dev_attr_in3_min.dev_attr.attr,
1228         &sensor_dev_attr_in4_input.dev_attr.attr,
1229         &sensor_dev_attr_in4_max.dev_attr.attr,
1230         &sensor_dev_attr_in4_min.dev_attr.attr,
1231         &sensor_dev_attr_in5_input.dev_attr.attr,
1232         &sensor_dev_attr_in5_max.dev_attr.attr,
1233         &sensor_dev_attr_in5_min.dev_attr.attr,
1234         &sensor_dev_attr_in6_input.dev_attr.attr,
1235         &sensor_dev_attr_in6_max.dev_attr.attr,
1236         &sensor_dev_attr_in6_min.dev_attr.attr,
1237         &sensor_dev_attr_in7_input.dev_attr.attr,
1238         &sensor_dev_attr_in7_max.dev_attr.attr,
1239         &sensor_dev_attr_in7_min.dev_attr.attr,
1240         &sensor_dev_attr_in8_input.dev_attr.attr,
1241         &sensor_dev_attr_in8_max.dev_attr.attr,
1242         &sensor_dev_attr_in8_min.dev_attr.attr,
1243         &sensor_dev_attr_in0_alarm.dev_attr.attr,
1244         &sensor_dev_attr_in1_alarm.dev_attr.attr,
1245         &sensor_dev_attr_in2_alarm.dev_attr.attr,
1246         &sensor_dev_attr_in3_alarm.dev_attr.attr,
1247         &sensor_dev_attr_in4_alarm.dev_attr.attr,
1248         &sensor_dev_attr_in5_alarm.dev_attr.attr,
1249         &sensor_dev_attr_in6_alarm.dev_attr.attr,
1250         &sensor_dev_attr_in7_alarm.dev_attr.attr,
1251         &sensor_dev_attr_in8_alarm.dev_attr.attr,
1252         &sensor_dev_attr_temp1_input.dev_attr.attr,
1253         &sensor_dev_attr_temp1_max.dev_attr.attr,
1254         &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
1255         &sensor_dev_attr_temp2_input.dev_attr.attr,
1256         &sensor_dev_attr_temp2_max.dev_attr.attr,
1257         &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
1258         &sensor_dev_attr_temp3_input.dev_attr.attr,
1259         &sensor_dev_attr_temp3_max.dev_attr.attr,
1260         &sensor_dev_attr_temp3_max_hyst.dev_attr.attr,
1261         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1262         &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1263         &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1264         &sensor_dev_attr_pwm1.dev_attr.attr,
1265         &sensor_dev_attr_pwm1_mode.dev_attr.attr,
1266         &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1267         &sensor_dev_attr_pwm2.dev_attr.attr,
1268         &sensor_dev_attr_pwm2_mode.dev_attr.attr,
1269         &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1270         &sensor_dev_attr_pwm3.dev_attr.attr,
1271         &sensor_dev_attr_pwm3_mode.dev_attr.attr,
1272         &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1273         &dev_attr_alarms.attr,
1274         &dev_attr_intrusion0_alarm.attr,
1275         &sensor_dev_attr_tolerance1.dev_attr.attr,
1276         &sensor_dev_attr_thermal_cruise1.dev_attr.attr,
1277         &sensor_dev_attr_tolerance2.dev_attr.attr,
1278         &sensor_dev_attr_thermal_cruise2.dev_attr.attr,
1279         &sensor_dev_attr_tolerance3.dev_attr.attr,
1280         &sensor_dev_attr_thermal_cruise3.dev_attr.attr,
1281         &sensor_dev_attr_sf2_point1_fan1.dev_attr.attr,
1282         &sensor_dev_attr_sf2_point2_fan1.dev_attr.attr,
1283         &sensor_dev_attr_sf2_point3_fan1.dev_attr.attr,
1284         &sensor_dev_attr_sf2_point4_fan1.dev_attr.attr,
1285         &sensor_dev_attr_sf2_point1_fan2.dev_attr.attr,
1286         &sensor_dev_attr_sf2_point2_fan2.dev_attr.attr,
1287         &sensor_dev_attr_sf2_point3_fan2.dev_attr.attr,
1288         &sensor_dev_attr_sf2_point4_fan2.dev_attr.attr,
1289         &sensor_dev_attr_sf2_point1_fan3.dev_attr.attr,
1290         &sensor_dev_attr_sf2_point2_fan3.dev_attr.attr,
1291         &sensor_dev_attr_sf2_point3_fan3.dev_attr.attr,
1292         &sensor_dev_attr_sf2_point4_fan3.dev_attr.attr,
1293         &sensor_dev_attr_sf2_level1_fan1.dev_attr.attr,
1294         &sensor_dev_attr_sf2_level2_fan1.dev_attr.attr,
1295         &sensor_dev_attr_sf2_level3_fan1.dev_attr.attr,
1296         &sensor_dev_attr_sf2_level1_fan2.dev_attr.attr,
1297         &sensor_dev_attr_sf2_level2_fan2.dev_attr.attr,
1298         &sensor_dev_attr_sf2_level3_fan2.dev_attr.attr,
1299         &sensor_dev_attr_sf2_level1_fan3.dev_attr.attr,
1300         &sensor_dev_attr_sf2_level2_fan3.dev_attr.attr,
1301         &sensor_dev_attr_sf2_level3_fan3.dev_attr.attr,
1302         &sensor_dev_attr_fan1_input.dev_attr.attr,
1303         &sensor_dev_attr_fan1_min.dev_attr.attr,
1304         &sensor_dev_attr_fan1_div.dev_attr.attr,
1305         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1306         &sensor_dev_attr_fan2_input.dev_attr.attr,
1307         &sensor_dev_attr_fan2_min.dev_attr.attr,
1308         &sensor_dev_attr_fan2_div.dev_attr.attr,
1309         &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1310         &sensor_dev_attr_fan3_input.dev_attr.attr,
1311         &sensor_dev_attr_fan3_min.dev_attr.attr,
1312         &sensor_dev_attr_fan3_div.dev_attr.attr,
1313         &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1314         NULL
1315 };
1316
1317 static const struct attribute_group w83792d_group = {
1318         .attrs = w83792d_attributes,
1319 };
1320
1321 /* Return 0 if detection is successful, -ENODEV otherwise */
1322 static int
1323 w83792d_detect(struct i2c_client *client, struct i2c_board_info *info)
1324 {
1325         struct i2c_adapter *adapter = client->adapter;
1326         int val1, val2;
1327         unsigned short address = client->addr;
1328
1329         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1330                 return -ENODEV;
1331
1332         if (w83792d_read_value(client, W83792D_REG_CONFIG) & 0x80)
1333                 return -ENODEV;
1334
1335         val1 = w83792d_read_value(client, W83792D_REG_BANK);
1336         val2 = w83792d_read_value(client, W83792D_REG_CHIPMAN);
1337         /* Check for Winbond ID if in bank 0 */
1338         if (!(val1 & 0x07)) {  /* is Bank0 */
1339                 if ((!(val1 & 0x80) && val2 != 0xa3) ||
1340                     ((val1 & 0x80) && val2 != 0x5c))
1341                         return -ENODEV;
1342         }
1343         /*
1344          * If Winbond chip, address of chip and W83792D_REG_I2C_ADDR
1345          * should match
1346          */
1347         if (w83792d_read_value(client, W83792D_REG_I2C_ADDR) != address)
1348                 return -ENODEV;
1349
1350         /*  Put it now into bank 0 and Vendor ID High Byte */
1351         w83792d_write_value(client,
1352                             W83792D_REG_BANK,
1353                             (w83792d_read_value(client,
1354                                 W83792D_REG_BANK) & 0x78) | 0x80);
1355
1356         /* Determine the chip type. */
1357         val1 = w83792d_read_value(client, W83792D_REG_WCHIPID);
1358         val2 = w83792d_read_value(client, W83792D_REG_CHIPMAN);
1359         if (val1 != 0x7a || val2 != 0x5c)
1360                 return -ENODEV;
1361
1362         strlcpy(info->type, "w83792d", I2C_NAME_SIZE);
1363
1364         return 0;
1365 }
1366
1367 static int
1368 w83792d_probe(struct i2c_client *client, const struct i2c_device_id *id)
1369 {
1370         struct w83792d_data *data;
1371         struct device *dev = &client->dev;
1372         int i, val1, err;
1373
1374         data = devm_kzalloc(dev, sizeof(struct w83792d_data), GFP_KERNEL);
1375         if (!data)
1376                 return -ENOMEM;
1377
1378         i2c_set_clientdata(client, data);
1379         data->valid = 0;
1380         mutex_init(&data->update_lock);
1381
1382         err = w83792d_detect_subclients(client);
1383         if (err)
1384                 return err;
1385
1386         /* Initialize the chip */
1387         w83792d_init_client(client);
1388
1389         /* A few vars need to be filled upon startup */
1390         for (i = 0; i < 7; i++) {
1391                 data->fan_min[i] = w83792d_read_value(client,
1392                                         W83792D_REG_FAN_MIN[i]);
1393         }
1394
1395         /* Register sysfs hooks */
1396         err = sysfs_create_group(&dev->kobj, &w83792d_group);
1397         if (err)
1398                 goto exit_i2c_unregister;
1399
1400         /*
1401          * Read GPIO enable register to check if pins for fan 4,5 are used as
1402          * GPIO
1403          */
1404         val1 = w83792d_read_value(client, W83792D_REG_GPIO_EN);
1405
1406         if (!(val1 & 0x40)) {
1407                 err = sysfs_create_group(&dev->kobj, &w83792d_group_fan[0]);
1408                 if (err)
1409                         goto exit_remove_files;
1410         }
1411
1412         if (!(val1 & 0x20)) {
1413                 err = sysfs_create_group(&dev->kobj, &w83792d_group_fan[1]);
1414                 if (err)
1415                         goto exit_remove_files;
1416         }
1417
1418         val1 = w83792d_read_value(client, W83792D_REG_PIN);
1419         if (val1 & 0x40) {
1420                 err = sysfs_create_group(&dev->kobj, &w83792d_group_fan[2]);
1421                 if (err)
1422                         goto exit_remove_files;
1423         }
1424
1425         if (val1 & 0x04) {
1426                 err = sysfs_create_group(&dev->kobj, &w83792d_group_fan[3]);
1427                 if (err)
1428                         goto exit_remove_files;
1429         }
1430
1431         data->hwmon_dev = hwmon_device_register(dev);
1432         if (IS_ERR(data->hwmon_dev)) {
1433                 err = PTR_ERR(data->hwmon_dev);
1434                 goto exit_remove_files;
1435         }
1436
1437         return 0;
1438
1439 exit_remove_files:
1440         sysfs_remove_group(&dev->kobj, &w83792d_group);
1441         for (i = 0; i < ARRAY_SIZE(w83792d_group_fan); i++)
1442                 sysfs_remove_group(&dev->kobj, &w83792d_group_fan[i]);
1443 exit_i2c_unregister:
1444         if (data->lm75[0] != NULL)
1445                 i2c_unregister_device(data->lm75[0]);
1446         if (data->lm75[1] != NULL)
1447                 i2c_unregister_device(data->lm75[1]);
1448         return err;
1449 }
1450
1451 static int
1452 w83792d_remove(struct i2c_client *client)
1453 {
1454         struct w83792d_data *data = i2c_get_clientdata(client);
1455         int i;
1456
1457         hwmon_device_unregister(data->hwmon_dev);
1458         sysfs_remove_group(&client->dev.kobj, &w83792d_group);
1459         for (i = 0; i < ARRAY_SIZE(w83792d_group_fan); i++)
1460                 sysfs_remove_group(&client->dev.kobj,
1461                                    &w83792d_group_fan[i]);
1462
1463         if (data->lm75[0] != NULL)
1464                 i2c_unregister_device(data->lm75[0]);
1465         if (data->lm75[1] != NULL)
1466                 i2c_unregister_device(data->lm75[1]);
1467
1468         return 0;
1469 }
1470
1471 static void
1472 w83792d_init_client(struct i2c_client *client)
1473 {
1474         u8 temp2_cfg, temp3_cfg, vid_in_b;
1475
1476         if (init)
1477                 w83792d_write_value(client, W83792D_REG_CONFIG, 0x80);
1478
1479         /*
1480          * Clear the bit6 of W83792D_REG_VID_IN_B(set it into 0):
1481          * W83792D_REG_VID_IN_B bit6 = 0: the high/low limit of
1482          * vin0/vin1 can be modified by user;
1483          * W83792D_REG_VID_IN_B bit6 = 1: the high/low limit of
1484          * vin0/vin1 auto-updated, can NOT be modified by user.
1485          */
1486         vid_in_b = w83792d_read_value(client, W83792D_REG_VID_IN_B);
1487         w83792d_write_value(client, W83792D_REG_VID_IN_B,
1488                             vid_in_b & 0xbf);
1489
1490         temp2_cfg = w83792d_read_value(client, W83792D_REG_TEMP2_CONFIG);
1491         temp3_cfg = w83792d_read_value(client, W83792D_REG_TEMP3_CONFIG);
1492         w83792d_write_value(client, W83792D_REG_TEMP2_CONFIG,
1493                                 temp2_cfg & 0xe6);
1494         w83792d_write_value(client, W83792D_REG_TEMP3_CONFIG,
1495                                 temp3_cfg & 0xe6);
1496
1497         /* Start monitoring */
1498         w83792d_write_value(client, W83792D_REG_CONFIG,
1499                             (w83792d_read_value(client,
1500                                                 W83792D_REG_CONFIG) & 0xf7)
1501                             | 0x01);
1502 }
1503
1504 static struct w83792d_data *w83792d_update_device(struct device *dev)
1505 {
1506         struct i2c_client *client = to_i2c_client(dev);
1507         struct w83792d_data *data = i2c_get_clientdata(client);
1508         int i, j;
1509         u8 reg_array_tmp[4], reg_tmp;
1510
1511         mutex_lock(&data->update_lock);
1512
1513         if (time_after
1514             (jiffies - data->last_updated, (unsigned long) (HZ * 3))
1515             || time_before(jiffies, data->last_updated) || !data->valid) {
1516                 dev_dbg(dev, "Starting device update\n");
1517
1518                 /* Update the voltages measured value and limits */
1519                 for (i = 0; i < 9; i++) {
1520                         data->in[i] = w83792d_read_value(client,
1521                                                 W83792D_REG_IN[i]);
1522                         data->in_max[i] = w83792d_read_value(client,
1523                                                 W83792D_REG_IN_MAX[i]);
1524                         data->in_min[i] = w83792d_read_value(client,
1525                                                 W83792D_REG_IN_MIN[i]);
1526                 }
1527                 data->low_bits = w83792d_read_value(client,
1528                                                 W83792D_REG_LOW_BITS1) +
1529                                  (w83792d_read_value(client,
1530                                                 W83792D_REG_LOW_BITS2) << 8);
1531                 for (i = 0; i < 7; i++) {
1532                         /* Update the Fan measured value and limits */
1533                         data->fan[i] = w83792d_read_value(client,
1534                                                 W83792D_REG_FAN[i]);
1535                         data->fan_min[i] = w83792d_read_value(client,
1536                                                 W83792D_REG_FAN_MIN[i]);
1537                         /* Update the PWM/DC Value and PWM/DC flag */
1538                         data->pwm[i] = w83792d_read_value(client,
1539                                                 W83792D_REG_PWM[i]);
1540                 }
1541
1542                 reg_tmp = w83792d_read_value(client, W83792D_REG_FAN_CFG);
1543                 data->pwmenable[0] = reg_tmp & 0x03;
1544                 data->pwmenable[1] = (reg_tmp>>2) & 0x03;
1545                 data->pwmenable[2] = (reg_tmp>>4) & 0x03;
1546
1547                 for (i = 0; i < 3; i++) {
1548                         data->temp1[i] = w83792d_read_value(client,
1549                                                         W83792D_REG_TEMP1[i]);
1550                 }
1551                 for (i = 0; i < 2; i++) {
1552                         for (j = 0; j < 6; j++) {
1553                                 data->temp_add[i][j] = w83792d_read_value(
1554                                         client, W83792D_REG_TEMP_ADD[i][j]);
1555                         }
1556                 }
1557
1558                 /* Update the Fan Divisor */
1559                 for (i = 0; i < 4; i++) {
1560                         reg_array_tmp[i] = w83792d_read_value(client,
1561                                                         W83792D_REG_FAN_DIV[i]);
1562                 }
1563                 data->fan_div[0] = reg_array_tmp[0] & 0x07;
1564                 data->fan_div[1] = (reg_array_tmp[0] >> 4) & 0x07;
1565                 data->fan_div[2] = reg_array_tmp[1] & 0x07;
1566                 data->fan_div[3] = (reg_array_tmp[1] >> 4) & 0x07;
1567                 data->fan_div[4] = reg_array_tmp[2] & 0x07;
1568                 data->fan_div[5] = (reg_array_tmp[2] >> 4) & 0x07;
1569                 data->fan_div[6] = reg_array_tmp[3] & 0x07;
1570
1571                 /* Update the realtime status */
1572                 data->alarms = w83792d_read_value(client, W83792D_REG_ALARM1) +
1573                         (w83792d_read_value(client, W83792D_REG_ALARM2) << 8) +
1574                         (w83792d_read_value(client, W83792D_REG_ALARM3) << 16);
1575
1576                 /* Update CaseOpen status and it's CLR_CHS. */
1577                 data->chassis = (w83792d_read_value(client,
1578                         W83792D_REG_CHASSIS) >> 5) & 0x01;
1579
1580                 /* Update Thermal Cruise/Smart Fan I target value */
1581                 for (i = 0; i < 3; i++) {
1582                         data->thermal_cruise[i] =
1583                                 w83792d_read_value(client,
1584                                 W83792D_REG_THERMAL[i]) & 0x7f;
1585                 }
1586
1587                 /* Update Smart Fan I/II tolerance */
1588                 reg_tmp = w83792d_read_value(client, W83792D_REG_TOLERANCE[0]);
1589                 data->tolerance[0] = reg_tmp & 0x0f;
1590                 data->tolerance[1] = (reg_tmp >> 4) & 0x0f;
1591                 data->tolerance[2] = w83792d_read_value(client,
1592                                         W83792D_REG_TOLERANCE[2]) & 0x0f;
1593
1594                 /* Update Smart Fan II temperature points */
1595                 for (i = 0; i < 3; i++) {
1596                         for (j = 0; j < 4; j++) {
1597                                 data->sf2_points[i][j]
1598                                   = w83792d_read_value(client,
1599                                         W83792D_REG_POINTS[i][j]) & 0x7f;
1600                         }
1601                 }
1602
1603                 /* Update Smart Fan II duty cycle levels */
1604                 for (i = 0; i < 3; i++) {
1605                         reg_tmp = w83792d_read_value(client,
1606                                                 W83792D_REG_LEVELS[i][0]);
1607                         data->sf2_levels[i][0] = reg_tmp & 0x0f;
1608                         data->sf2_levels[i][1] = (reg_tmp >> 4) & 0x0f;
1609                         reg_tmp = w83792d_read_value(client,
1610                                                 W83792D_REG_LEVELS[i][2]);
1611                         data->sf2_levels[i][2] = (reg_tmp >> 4) & 0x0f;
1612                         data->sf2_levels[i][3] = reg_tmp & 0x0f;
1613                 }
1614
1615                 data->last_updated = jiffies;
1616                 data->valid = 1;
1617         }
1618
1619         mutex_unlock(&data->update_lock);
1620
1621 #ifdef DEBUG
1622         w83792d_print_debug(data, dev);
1623 #endif
1624
1625         return data;
1626 }
1627
1628 #ifdef DEBUG
1629 static void w83792d_print_debug(struct w83792d_data *data, struct device *dev)
1630 {
1631         int i = 0, j = 0;
1632         dev_dbg(dev, "==========The following is the debug message...========\n");
1633         dev_dbg(dev, "9 set of Voltages: =====>\n");
1634         for (i = 0; i < 9; i++) {
1635                 dev_dbg(dev, "vin[%d] is: 0x%x\n", i, data->in[i]);
1636                 dev_dbg(dev, "vin[%d] max is: 0x%x\n", i, data->in_max[i]);
1637                 dev_dbg(dev, "vin[%d] min is: 0x%x\n", i, data->in_min[i]);
1638         }
1639         dev_dbg(dev, "Low Bit1 is: 0x%x\n", data->low_bits & 0xff);
1640         dev_dbg(dev, "Low Bit2 is: 0x%x\n", data->low_bits >> 8);
1641         dev_dbg(dev, "7 set of Fan Counts and Duty Cycles: =====>\n");
1642         for (i = 0; i < 7; i++) {
1643                 dev_dbg(dev, "fan[%d] is: 0x%x\n", i, data->fan[i]);
1644                 dev_dbg(dev, "fan[%d] min is: 0x%x\n", i, data->fan_min[i]);
1645                 dev_dbg(dev, "pwm[%d]     is: 0x%x\n", i, data->pwm[i]);
1646         }
1647         dev_dbg(dev, "3 set of Temperatures: =====>\n");
1648         for (i = 0; i < 3; i++)
1649                 dev_dbg(dev, "temp1[%d] is: 0x%x\n", i, data->temp1[i]);
1650
1651         for (i = 0; i < 2; i++) {
1652                 for (j = 0; j < 6; j++) {
1653                         dev_dbg(dev, "temp_add[%d][%d] is: 0x%x\n", i, j,
1654                                                         data->temp_add[i][j]);
1655                 }
1656         }
1657
1658         for (i = 0; i < 7; i++)
1659                 dev_dbg(dev, "fan_div[%d] is: 0x%x\n", i, data->fan_div[i]);
1660
1661         dev_dbg(dev, "==========End of the debug message...================\n");
1662         dev_dbg(dev, "\n");
1663 }
1664 #endif
1665
1666 module_i2c_driver(w83792d_driver);
1667
1668 MODULE_AUTHOR("Chunhao Huang @ Winbond <DZShen@Winbond.com.tw>");
1669 MODULE_DESCRIPTION("W83792AD/D driver for linux-2.6");
1670 MODULE_LICENSE("GPL");