drivers/hwmon/it87.c

   1 /*
   2  *  it87.c - Part of lm_sensors, Linux kernel modules for hardware
   3  *           monitoring.
   4  *
   5  *  The IT8705F is an LPC-based Super I/O part that contains UARTs, a
   6  *  parallel port, an IR port, a MIDI port, a floppy controller, etc., in
   7  *  addition to an Environment Controller (Enhanced Hardware Monitor and
   8  *  Fan Controller)
   9  *
  10  *  This driver supports only the Environment Controller in the IT8705F and
  11  *  similar parts.  The other devices are supported by different drivers.
  12  *
  13  *  Supports: IT8603E  Super I/O chip w/LPC interface
  14  *            IT8623E  Super I/O chip w/LPC interface
  15  *            IT8705F  Super I/O chip w/LPC interface
  16  *            IT8712F  Super I/O chip w/LPC interface
  17  *            IT8716F  Super I/O chip w/LPC interface
  18  *            IT8718F  Super I/O chip w/LPC interface
  19  *            IT8720F  Super I/O chip w/LPC interface
  20  *            IT8721F  Super I/O chip w/LPC interface
  21  *            IT8726F  Super I/O chip w/LPC interface
  22  *            IT8728F  Super I/O chip w/LPC interface
  23  *            IT8758E  Super I/O chip w/LPC interface
  24  *            IT8771E  Super I/O chip w/LPC interface
  25  *            IT8772E  Super I/O chip w/LPC interface
  26  *            IT8781F  Super I/O chip w/LPC interface
  27  *            IT8782F  Super I/O chip w/LPC interface
  28  *            IT8783E/F Super I/O chip w/LPC interface
  29  *            IT8786E  Super I/O chip w/LPC interface
  30  *            Sis950   A clone of the IT8705F
  31  *
  32  *  Copyright (C) 2001 Chris Gauthron
  33  *  Copyright (C) 2005-2010 Jean Delvare <jdelvare@suse.de>
  34  *
  35  *  This program is free software; you can redistribute it and/or modify
  36  *  it under the terms of the GNU General Public License as published by
  37  *  the Free Software Foundation; either version 2 of the License, or
  38  *  (at your option) any later version.
  39  *
  40  *  This program is distributed in the hope that it will be useful,
  41  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  42  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  43  *  GNU General Public License for more details.
  44  *
  45  *  You should have received a copy of the GNU General Public License
  46  *  along with this program; if not, write to the Free Software
  47  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  48  */
  49
  50 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  51
  52 #include <linux/module.h>
  53 #include <linux/init.h>
  54 #include <linux/slab.h>
  55 #include <linux/jiffies.h>
  56 #include <linux/platform_device.h>
  57 #include <linux/hwmon.h>
  58 #include <linux/hwmon-sysfs.h>
  59 #include <linux/hwmon-vid.h>
  60 #include <linux/err.h>
  61 #include <linux/mutex.h>
  62 #include <linux/sysfs.h>
  63 #include <linux/string.h>
  64 #include <linux/dmi.h>
  65 #include <linux/acpi.h>
  66 #include <linux/io.h>
  67
  68 #define DRVNAME "it87"
  69
  70 enum chips { it87, it8712, it8716, it8718, it8720, it8721, it8728, it8771,
  71              it8772, it8781, it8782, it8783, it8786, it8603 };
  72
  73 static unsigned short force_id;
  74 module_param(force_id, ushort, 0);
  75 MODULE_PARM_DESC(force_id, "Override the detected device ID");
  76
  77 static struct platform_device *pdev;
  78
  79 #define REG     0x2e    /* The register to read/write */
  80 #define DEV     0x07    /* Register: Logical device select */
  81 #define VAL     0x2f    /* The value to read/write */
  82 #define PME     0x04    /* The device with the fan registers in it */
  83
  84 /* The device with the IT8718F/IT8720F VID value in it */
  85 #define GPIO    0x07
  86
  87 #define DEVID   0x20    /* Register: Device ID */
  88 #define DEVREV  0x22    /* Register: Device Revision */
  89
  90 static inline int superio_inb(int reg)
  91 {
  92         outb(reg, REG);
  93         return inb(VAL);
  94 }
  95
  96 static inline void superio_outb(int reg, int val)
  97 {
  98         outb(reg, REG);
  99         outb(val, VAL);
 100 }
 101
 102 static int superio_inw(int reg)
 103 {
 104         int val;
 105         outb(reg++, REG);
 106         val = inb(VAL) << 8;
 107         outb(reg, REG);
 108         val |= inb(VAL);
 109         return val;
 110 }
 111
 112 static inline void superio_select(int ldn)
 113 {
 114         outb(DEV, REG);
 115         outb(ldn, VAL);
 116 }
 117
 118 static inline int superio_enter(void)
 119 {
 120         /*
 121          * Try to reserve REG and REG + 1 for exclusive access.
 122          */
 123         if (!request_muxed_region(REG, 2, DRVNAME))
 124                 return -EBUSY;
 125
 126         outb(0x87, REG);
 127         outb(0x01, REG);
 128         outb(0x55, REG);
 129         outb(0x55, REG);
 130         return 0;
 131 }
 132
 133 static inline void superio_exit(void)
 134 {
 135         outb(0x02, REG);
 136         outb(0x02, VAL);
 137         release_region(REG, 2);
 138 }
 139
 140 /* Logical device 4 registers */
 141 #define IT8712F_DEVID 0x8712
 142 #define IT8705F_DEVID 0x8705
 143 #define IT8716F_DEVID 0x8716
 144 #define IT8718F_DEVID 0x8718
 145 #define IT8720F_DEVID 0x8720
 146 #define IT8721F_DEVID 0x8721
 147 #define IT8726F_DEVID 0x8726
 148 #define IT8728F_DEVID 0x8728
 149 #define IT8771E_DEVID 0x8771
 150 #define IT8772E_DEVID 0x8772
 151 #define IT8781F_DEVID 0x8781
 152 #define IT8782F_DEVID 0x8782
 153 #define IT8783E_DEVID 0x8783
 154 #define IT8786E_DEVID 0x8786
 155 #define IT8603E_DEVID 0x8603
 156 #define IT8623E_DEVID 0x8623
 157 #define IT87_ACT_REG  0x30
 158 #define IT87_BASE_REG 0x60
 159
 160 /* Logical device 7 registers (IT8712F and later) */
 161 #define IT87_SIO_GPIO1_REG      0x25
 162 #define IT87_SIO_GPIO3_REG      0x27
 163 #define IT87_SIO_GPIO5_REG      0x29
 164 #define IT87_SIO_PINX1_REG      0x2a    /* Pin selection */
 165 #define IT87_SIO_PINX2_REG      0x2c    /* Pin selection */
 166 #define IT87_SIO_SPI_REG        0xef    /* SPI function pin select */
 167 #define IT87_SIO_VID_REG        0xfc    /* VID value */
 168 #define IT87_SIO_BEEP_PIN_REG   0xf6    /* Beep pin mapping */
 169
 170 /* Update battery voltage after every reading if true */
 171 static bool update_vbat;
 172
 173 /* Not all BIOSes properly configure the PWM registers */
 174 static bool fix_pwm_polarity;
 175
 176 /* Many IT87 constants specified below */
 177
 178 /* Length of ISA address segment */
 179 #define IT87_EXTENT 8
 180
 181 /* Length of ISA address segment for Environmental Controller */
 182 #define IT87_EC_EXTENT 2
 183
 184 /* Offset of EC registers from ISA base address */
 185 #define IT87_EC_OFFSET 5
 186
 187 /* Where are the ISA address/data registers relative to the EC base address */
 188 #define IT87_ADDR_REG_OFFSET 0
 189 #define IT87_DATA_REG_OFFSET 1
 190
 191 /*----- The IT87 registers -----*/
 192
 193 #define IT87_REG_CONFIG        0x00
 194
 195 #define IT87_REG_ALARM1        0x01
 196 #define IT87_REG_ALARM2        0x02
 197 #define IT87_REG_ALARM3        0x03
 198
 199 /*
 200  * The IT8718F and IT8720F have the VID value in a different register, in
 201  * Super-I/O configuration space.
 202  */
 203 #define IT87_REG_VID           0x0a
 204 /*
 205  * The IT8705F and IT8712F earlier than revision 0x08 use register 0x0b
 206  * for fan divisors. Later IT8712F revisions must use 16-bit tachometer
 207  * mode.
 208  */
 209 #define IT87_REG_FAN_DIV       0x0b
 210 #define IT87_REG_FAN_16BIT     0x0c
 211
 212 /* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */
 213
 214 static const u8 IT87_REG_FAN[]          = { 0x0d, 0x0e, 0x0f, 0x80, 0x82 };
 215 static const u8 IT87_REG_FAN_MIN[]      = { 0x10, 0x11, 0x12, 0x84, 0x86 };
 216 static const u8 IT87_REG_FANX[]         = { 0x18, 0x19, 0x1a, 0x81, 0x83 };
 217 static const u8 IT87_REG_FANX_MIN[]     = { 0x1b, 0x1c, 0x1d, 0x85, 0x87 };
 218 static const u8 IT87_REG_TEMP_OFFSET[]  = { 0x56, 0x57, 0x59 };
 219
 220 #define IT87_REG_FAN_MAIN_CTRL 0x13
 221 #define IT87_REG_FAN_CTL       0x14
 222 #define IT87_REG_PWM(nr)       (0x15 + (nr))
 223 #define IT87_REG_PWM_DUTY(nr)  (0x63 + (nr) * 8)
 224
 225 #define IT87_REG_VIN(nr)       (0x20 + (nr))
 226 #define IT87_REG_TEMP(nr)      (0x29 + (nr))
 227
 228 #define IT87_REG_VIN_MAX(nr)   (0x30 + (nr) * 2)
 229 #define IT87_REG_VIN_MIN(nr)   (0x31 + (nr) * 2)
 230 #define IT87_REG_TEMP_HIGH(nr) (0x40 + (nr) * 2)
 231 #define IT87_REG_TEMP_LOW(nr)  (0x41 + (nr) * 2)
 232
 233 #define IT87_REG_VIN_ENABLE    0x50
 234 #define IT87_REG_TEMP_ENABLE   0x51
 235 #define IT87_REG_TEMP_EXTRA    0x55
 236 #define IT87_REG_BEEP_ENABLE   0x5c
 237
 238 #define IT87_REG_CHIPID        0x58
 239
 240 #define IT87_REG_AUTO_TEMP(nr, i) (0x60 + (nr) * 8 + (i))
 241 #define IT87_REG_AUTO_PWM(nr, i)  (0x65 + (nr) * 8 + (i))
 242
 243 struct it87_devices {
 244         const char *name;
 245         const char * const suffix;
 246         u16 features;
 247         u8 peci_mask;
 248         u8 old_peci_mask;
 249 };
 250
 251 #define FEAT_12MV_ADC           (1 << 0)
 252 #define FEAT_NEWER_AUTOPWM      (1 << 1)
 253 #define FEAT_OLD_AUTOPWM        (1 << 2)
 254 #define FEAT_16BIT_FANS         (1 << 3)
 255 #define FEAT_TEMP_OFFSET        (1 << 4)
 256 #define FEAT_TEMP_PECI          (1 << 5)
 257 #define FEAT_TEMP_OLD_PECI      (1 << 6)
 258 #define FEAT_FAN16_CONFIG       (1 << 7)        /* Need to enable 16-bit fans */
 259 #define FEAT_FIVE_FANS          (1 << 8)        /* Supports five fans */
 260 #define FEAT_VID                (1 << 9)        /* Set if chip supports VID */
 261
 262 static const struct it87_devices it87_devices[] = {
 263         [it87] = {
 264                 .name = "it87",
 265                 .suffix = "F",
 266                 .features = FEAT_OLD_AUTOPWM,   /* may need to overwrite */
 267         },
 268         [it8712] = {
 269                 .name = "it8712",
 270                 .suffix = "F",
 271                 .features = FEAT_OLD_AUTOPWM | FEAT_VID,
 272                                                 /* may need to overwrite */
 273         },
 274         [it8716] = {
 275                 .name = "it8716",
 276                 .suffix = "F",
 277                 .features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET | FEAT_VID
 278                   | FEAT_FAN16_CONFIG | FEAT_FIVE_FANS,
 279         },
 280         [it8718] = {
 281                 .name = "it8718",
 282                 .suffix = "F",
 283                 .features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET | FEAT_VID
 284                   | FEAT_TEMP_OLD_PECI | FEAT_FAN16_CONFIG | FEAT_FIVE_FANS,
 285                 .old_peci_mask = 0x4,
 286         },
 287         [it8720] = {
 288                 .name = "it8720",
 289                 .suffix = "F",
 290                 .features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET | FEAT_VID
 291                   | FEAT_TEMP_OLD_PECI | FEAT_FAN16_CONFIG | FEAT_FIVE_FANS,
 292                 .old_peci_mask = 0x4,
 293         },
 294         [it8721] = {
 295                 .name = "it8721",
 296                 .suffix = "F",
 297                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
 298                   | FEAT_TEMP_OFFSET | FEAT_TEMP_OLD_PECI | FEAT_TEMP_PECI
 299                   | FEAT_FAN16_CONFIG | FEAT_FIVE_FANS,
 300                 .peci_mask = 0x05,
 301                 .old_peci_mask = 0x02,  /* Actually reports PCH */
 302         },
 303         [it8728] = {
 304                 .name = "it8728",
 305                 .suffix = "F",
 306                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
 307                   | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI | FEAT_FIVE_FANS,
 308                 .peci_mask = 0x07,
 309         },
 310         [it8771] = {
 311                 .name = "it8771",
 312                 .suffix = "E",
 313                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
 314                   | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI,
 315                                 /* PECI: guesswork */
 316                                 /* 12mV ADC (OHM) */
 317                                 /* 16 bit fans (OHM) */
 318                                 /* three fans, always 16 bit (guesswork) */
 319                 .peci_mask = 0x07,
 320         },
 321         [it8772] = {
 322                 .name = "it8772",
 323                 .suffix = "E",
 324                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
 325                   | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI,
 326                                 /* PECI (coreboot) */
 327                                 /* 12mV ADC (HWSensors4, OHM) */
 328                                 /* 16 bit fans (HWSensors4, OHM) */
 329                                 /* three fans, always 16 bit (datasheet) */
 330                 .peci_mask = 0x07,
 331         },
 332         [it8781] = {
 333                 .name = "it8781",
 334                 .suffix = "F",
 335                 .features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET
 336                   | FEAT_TEMP_OLD_PECI | FEAT_FAN16_CONFIG,
 337                 .old_peci_mask = 0x4,
 338         },
 339         [it8782] = {
 340                 .name = "it8782",
 341                 .suffix = "F",
 342                 .features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET
 343                   | FEAT_TEMP_OLD_PECI | FEAT_FAN16_CONFIG,
 344                 .old_peci_mask = 0x4,
 345         },
 346         [it8783] = {
 347                 .name = "it8783",
 348                 .suffix = "E/F",
 349                 .features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET
 350                   | FEAT_TEMP_OLD_PECI | FEAT_FAN16_CONFIG,
 351                 .old_peci_mask = 0x4,
 352         },
 353         [it8786] = {
 354                 .name = "it8786",
 355                 .suffix = "E",
 356                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
 357                   | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI,
 358                 .peci_mask = 0x07,
 359         },
 360         [it8603] = {
 361                 .name = "it8603",
 362                 .suffix = "E",
 363                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
 364                   | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI,
 365                 .peci_mask = 0x07,
 366         },
 367 };
 368
 369 #define has_16bit_fans(data)    ((data)->features & FEAT_16BIT_FANS)
 370 #define has_12mv_adc(data)      ((data)->features & FEAT_12MV_ADC)
 371 #define has_newer_autopwm(data) ((data)->features & FEAT_NEWER_AUTOPWM)
 372 #define has_old_autopwm(data)   ((data)->features & FEAT_OLD_AUTOPWM)
 373 #define has_temp_offset(data)   ((data)->features & FEAT_TEMP_OFFSET)
 374 #define has_temp_peci(data, nr) (((data)->features & FEAT_TEMP_PECI) && \
 375                                  ((data)->peci_mask & (1 << nr)))
 376 #define has_temp_old_peci(data, nr) \
 377                                 (((data)->features & FEAT_TEMP_OLD_PECI) && \
 378                                  ((data)->old_peci_mask & (1 << nr)))
 379 #define has_fan16_config(data)  ((data)->features & FEAT_FAN16_CONFIG)
 380 #define has_five_fans(data)     ((data)->features & FEAT_FIVE_FANS)
 381 #define has_vid(data)           ((data)->features & FEAT_VID)
 382
 383 struct it87_sio_data {
 384         enum chips type;
 385         /* Values read from Super-I/O config space */
 386         u8 revision;
 387         u8 vid_value;
 388         u8 beep_pin;
 389         u8 internal;    /* Internal sensors can be labeled */
 390         /* Features skipped based on config or DMI */
 391         u16 skip_in;
 392         u8 skip_vid;
 393         u8 skip_fan;
 394         u8 skip_pwm;
 395         u8 skip_temp;
 396 };
 397
 398 /*
 399  * For each registered chip, we need to keep some data in memory.
 400  * The structure is dynamically allocated.
 401  */
 402 struct it87_data {
 403         struct device *hwmon_dev;
 404         enum chips type;
 405         u16 features;
 406         u8 peci_mask;
 407         u8 old_peci_mask;
 408
 409         unsigned short addr;
 410         const char *name;
 411         struct mutex update_lock;
 412         char valid;             /* !=0 if following fields are valid */
 413         unsigned long last_updated;     /* In jiffies */
 414
 415         u16 in_scaled;          /* Internal voltage sensors are scaled */
 416         u8 in[10][3];           /* [nr][0]=in, [1]=min, [2]=max */
 417         u8 has_fan;             /* Bitfield, fans enabled */
 418         u16 fan[5][2];          /* Register values, [nr][0]=fan, [1]=min */
 419         u8 has_temp;            /* Bitfield, temp sensors enabled */
 420         s8 temp[3][4];          /* [nr][0]=temp, [1]=min, [2]=max, [3]=offset */
 421         u8 sensor;              /* Register value (IT87_REG_TEMP_ENABLE) */
 422         u8 extra;               /* Register value (IT87_REG_TEMP_EXTRA) */
 423         u8 fan_div[3];          /* Register encoding, shifted right */
 424         u8 vid;                 /* Register encoding, combined */
 425         u8 vrm;
 426         u32 alarms;             /* Register encoding, combined */
 427         u8 beeps;               /* Register encoding */
 428         u8 fan_main_ctrl;       /* Register value */
 429         u8 fan_ctl;             /* Register value */
 430
 431         /*
 432          * The following 3 arrays correspond to the same registers up to
 433          * the IT8720F. The meaning of bits 6-0 depends on the value of bit
 434          * 7, and we want to preserve settings on mode changes, so we have
 435          * to track all values separately.
 436          * Starting with the IT8721F, the manual PWM duty cycles are stored
 437          * in separate registers (8-bit values), so the separate tracking
 438          * is no longer needed, but it is still done to keep the driver
 439          * simple.
 440          */
 441         u8 pwm_ctrl[3];         /* Register value */
 442         u8 pwm_duty[3];         /* Manual PWM value set by user */
 443         u8 pwm_temp_map[3];     /* PWM to temp. chan. mapping (bits 1-0) */
 444
 445         /* Automatic fan speed control registers */
 446         u8 auto_pwm[3][4];      /* [nr][3] is hard-coded */
 447         s8 auto_temp[3][5];     /* [nr][0] is point1_temp_hyst */
 448 };
 449
 450 static int adc_lsb(const struct it87_data *data, int nr)
 451 {
 452         int lsb = has_12mv_adc(data) ? 12 : 16;
 453         if (data->in_scaled & (1 << nr))
 454                 lsb <<= 1;
 455         return lsb;
 456 }
 457
 458 static u8 in_to_reg(const struct it87_data *data, int nr, long val)
 459 {
 460         val = DIV_ROUND_CLOSEST(val, adc_lsb(data, nr));
 461         return clamp_val(val, 0, 255);
 462 }
 463
 464 static int in_from_reg(const struct it87_data *data, int nr, int val)
 465 {
 466         return val * adc_lsb(data, nr);
 467 }
 468
 469 static inline u8 FAN_TO_REG(long rpm, int div)
 470 {
 471         if (rpm == 0)
 472                 return 255;
 473         rpm = clamp_val(rpm, 1, 1000000);
 474         return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
 475 }
 476
 477 static inline u16 FAN16_TO_REG(long rpm)
 478 {
 479         if (rpm == 0)
 480                 return 0xffff;
 481         return clamp_val((1350000 + rpm) / (rpm * 2), 1, 0xfffe);
 482 }
 483
 484 #define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : (val) == 255 ? 0 : \
 485                                 1350000 / ((val) * (div)))
 486 /* The divider is fixed to 2 in 16-bit mode */
 487 #define FAN16_FROM_REG(val) ((val) == 0 ? -1 : (val) == 0xffff ? 0 : \
 488                              1350000 / ((val) * 2))
 489
 490 #define TEMP_TO_REG(val) (clamp_val(((val) < 0 ? (((val) - 500) / 1000) : \
 491                                     ((val) + 500) / 1000), -128, 127))
 492 #define TEMP_FROM_REG(val) ((val) * 1000)
 493
 494 static u8 pwm_to_reg(const struct it87_data *data, long val)
 495 {
 496         if (has_newer_autopwm(data))
 497                 return val;
 498         else
 499                 return val >> 1;
 500 }
 501
 502 static int pwm_from_reg(const struct it87_data *data, u8 reg)
 503 {
 504         if (has_newer_autopwm(data))
 505                 return reg;
 506         else
 507                 return (reg & 0x7f) << 1;
 508 }
 509
 510
 511 static int DIV_TO_REG(int val)
 512 {
 513         int answer = 0;
 514         while (answer < 7 && (val >>= 1))
 515                 answer++;
 516         return answer;
 517 }
 518 #define DIV_FROM_REG(val) (1 << (val))
 519
 520 /*
 521  * PWM base frequencies. The frequency has to be divided by either 128 or 256,
 522  * depending on the chip type, to calculate the actual PWM frequency.
 523  *
 524  * Some of the chip datasheets suggest a base frequency of 51 kHz instead
 525  * of 750 kHz for the slowest base frequency, resulting in a PWM frequency
 526  * of 200 Hz. Sometimes both PWM frequency select registers are affected,
 527  * sometimes just one. It is unknown if this is a datasheet error or real,
 528  * so this is ignored for now.
 529  */
 530 static const unsigned int pwm_freq[8] = {
 531         48000000,
 532         24000000,
 533         12000000,
 534         8000000,
 535         6000000,
 536         3000000,
 537         1500000,
 538         750000,
 539 };
 540
 541 static int it87_probe(struct platform_device *pdev);
 542 static int it87_remove(struct platform_device *pdev);
 543
 544 static int it87_read_value(struct it87_data *data, u8 reg);
 545 static void it87_write_value(struct it87_data *data, u8 reg, u8 value);
 546 static struct it87_data *it87_update_device(struct device *dev);
 547 static int it87_check_pwm(struct device *dev);
 548 static void it87_init_device(struct platform_device *pdev);
 549
 550
 551 static struct platform_driver it87_driver = {
 552         .driver = {
 553                 .name   = DRVNAME,
 554         },
 555         .probe  = it87_probe,
 556         .remove = it87_remove,
 557 };
 558
 559 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
 560                        char *buf)
 561 {
 562         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 563         int nr = sattr->nr;
 564         int index = sattr->index;
 565
 566         struct it87_data *data = it87_update_device(dev);
 567         return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in[nr][index]));
 568 }
 569
 570 static ssize_t set_in(struct device *dev, struct device_attribute *attr,
 571                       const char *buf, size_t count)
 572 {
 573         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 574         int nr = sattr->nr;
 575         int index = sattr->index;
 576
 577         struct it87_data *data = dev_get_drvdata(dev);
 578         unsigned long val;
 579
 580         if (kstrtoul(buf, 10, &val) < 0)
 581                 return -EINVAL;
 582
 583         mutex_lock(&data->update_lock);
 584         data->in[nr][index] = in_to_reg(data, nr, val);
 585         it87_write_value(data,
 586                          index == 1 ? IT87_REG_VIN_MIN(nr)
 587                                     : IT87_REG_VIN_MAX(nr),
 588                          data->in[nr][index]);
 589         mutex_unlock(&data->update_lock);
 590         return count;
 591 }
 592
 593 static SENSOR_DEVICE_ATTR_2(in0_input, S_IRUGO, show_in, NULL, 0, 0);
 594 static SENSOR_DEVICE_ATTR_2(in0_min, S_IRUGO | S_IWUSR, show_in, set_in,
 595                             0, 1);
 596 static SENSOR_DEVICE_ATTR_2(in0_max, S_IRUGO | S_IWUSR, show_in, set_in,
 597                             0, 2);
 598
 599 static SENSOR_DEVICE_ATTR_2(in1_input, S_IRUGO, show_in, NULL, 1, 0);
 600 static SENSOR_DEVICE_ATTR_2(in1_min, S_IRUGO | S_IWUSR, show_in, set_in,
 601                             1, 1);
 602 static SENSOR_DEVICE_ATTR_2(in1_max, S_IRUGO | S_IWUSR, show_in, set_in,
 603                             1, 2);
 604
 605 static SENSOR_DEVICE_ATTR_2(in2_input, S_IRUGO, show_in, NULL, 2, 0);
 606 static SENSOR_DEVICE_ATTR_2(in2_min, S_IRUGO | S_IWUSR, show_in, set_in,
 607                             2, 1);
 608 static SENSOR_DEVICE_ATTR_2(in2_max, S_IRUGO | S_IWUSR, show_in, set_in,
 609                             2, 2);
 610
 611 static SENSOR_DEVICE_ATTR_2(in3_input, S_IRUGO, show_in, NULL, 3, 0);
 612 static SENSOR_DEVICE_ATTR_2(in3_min, S_IRUGO | S_IWUSR, show_in, set_in,
 613                             3, 1);
 614 static SENSOR_DEVICE_ATTR_2(in3_max, S_IRUGO | S_IWUSR, show_in, set_in,
 615                             3, 2);
 616
 617 static SENSOR_DEVICE_ATTR_2(in4_input, S_IRUGO, show_in, NULL, 4, 0);
 618 static SENSOR_DEVICE_ATTR_2(in4_min, S_IRUGO | S_IWUSR, show_in, set_in,
 619                             4, 1);
 620 static SENSOR_DEVICE_ATTR_2(in4_max, S_IRUGO | S_IWUSR, show_in, set_in,
 621                             4, 2);
 622
 623 static SENSOR_DEVICE_ATTR_2(in5_input, S_IRUGO, show_in, NULL, 5, 0);
 624 static SENSOR_DEVICE_ATTR_2(in5_min, S_IRUGO | S_IWUSR, show_in, set_in,
 625                             5, 1);
 626 static SENSOR_DEVICE_ATTR_2(in5_max, S_IRUGO | S_IWUSR, show_in, set_in,
 627                             5, 2);
 628
 629 static SENSOR_DEVICE_ATTR_2(in6_input, S_IRUGO, show_in, NULL, 6, 0);
 630 static SENSOR_DEVICE_ATTR_2(in6_min, S_IRUGO | S_IWUSR, show_in, set_in,
 631                             6, 1);
 632 static SENSOR_DEVICE_ATTR_2(in6_max, S_IRUGO | S_IWUSR, show_in, set_in,
 633                             6, 2);
 634
 635 static SENSOR_DEVICE_ATTR_2(in7_input, S_IRUGO, show_in, NULL, 7, 0);
 636 static SENSOR_DEVICE_ATTR_2(in7_min, S_IRUGO | S_IWUSR, show_in, set_in,
 637                             7, 1);
 638 static SENSOR_DEVICE_ATTR_2(in7_max, S_IRUGO | S_IWUSR, show_in, set_in,
 639                             7, 2);
 640
 641 static SENSOR_DEVICE_ATTR_2(in8_input, S_IRUGO, show_in, NULL, 8, 0);
 642 static SENSOR_DEVICE_ATTR_2(in9_input, S_IRUGO, show_in, NULL, 9, 0);
 643
 644 /* 3 temperatures */
 645 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
 646                          char *buf)
 647 {
 648         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 649         int nr = sattr->nr;
 650         int index = sattr->index;
 651         struct it87_data *data = it87_update_device(dev);
 652
 653         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr][index]));
 654 }
 655
 656 static ssize_t set_temp(struct device *dev, struct device_attribute *attr,
 657                         const char *buf, size_t count)
 658 {
 659         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 660         int nr = sattr->nr;
 661         int index = sattr->index;
 662         struct it87_data *data = dev_get_drvdata(dev);
 663         long val;
 664         u8 reg, regval;
 665
 666         if (kstrtol(buf, 10, &val) < 0)
 667                 return -EINVAL;
 668
 669         mutex_lock(&data->update_lock);
 670
 671         switch (index) {
 672         default:
 673         case 1:
 674                 reg = IT87_REG_TEMP_LOW(nr);
 675                 break;
 676         case 2:
 677                 reg = IT87_REG_TEMP_HIGH(nr);
 678                 break;
 679         case 3:
 680                 regval = it87_read_value(data, IT87_REG_BEEP_ENABLE);
 681                 if (!(regval & 0x80)) {
 682                         regval |= 0x80;
 683                         it87_write_value(data, IT87_REG_BEEP_ENABLE, regval);
 684                 }
 685                 data->valid = 0;
 686                 reg = IT87_REG_TEMP_OFFSET[nr];
 687                 break;
 688         }
 689
 690         data->temp[nr][index] = TEMP_TO_REG(val);
 691         it87_write_value(data, reg, data->temp[nr][index]);
 692         mutex_unlock(&data->update_lock);
 693         return count;
 694 }
 695
 696 static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 0);
 697 static SENSOR_DEVICE_ATTR_2(temp1_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
 698                             0, 1);
 699 static SENSOR_DEVICE_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
 700                             0, 2);
 701 static SENSOR_DEVICE_ATTR_2(temp1_offset, S_IRUGO | S_IWUSR, show_temp,
 702                             set_temp, 0, 3);
 703 static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 1, 0);
 704 static SENSOR_DEVICE_ATTR_2(temp2_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
 705                             1, 1);
 706 static SENSOR_DEVICE_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
 707                             1, 2);
 708 static SENSOR_DEVICE_ATTR_2(temp2_offset, S_IRUGO | S_IWUSR, show_temp,
 709                             set_temp, 1, 3);
 710 static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp, NULL, 2, 0);
 711 static SENSOR_DEVICE_ATTR_2(temp3_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
 712                             2, 1);
 713 static SENSOR_DEVICE_ATTR_2(temp3_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
 714                             2, 2);
 715 static SENSOR_DEVICE_ATTR_2(temp3_offset, S_IRUGO | S_IWUSR, show_temp,
 716                             set_temp, 2, 3);
 717
 718 static ssize_t show_temp_type(struct device *dev, struct device_attribute *attr,
 719                               char *buf)
 720 {
 721         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 722         int nr = sensor_attr->index;
 723         struct it87_data *data = it87_update_device(dev);
 724         u8 reg = data->sensor;      /* In case value is updated while used */
 725         u8 extra = data->extra;
 726
 727         if ((has_temp_peci(data, nr) && (reg >> 6 == nr + 1))
 728             || (has_temp_old_peci(data, nr) && (extra & 0x80)))
 729                 return sprintf(buf, "6\n");  /* Intel PECI */
 730         if (reg & (1 << nr))
 731                 return sprintf(buf, "3\n");  /* thermal diode */
 732         if (reg & (8 << nr))
 733                 return sprintf(buf, "4\n");  /* thermistor */
 734         return sprintf(buf, "0\n");      /* disabled */
 735 }
 736
 737 static ssize_t set_temp_type(struct device *dev, struct device_attribute *attr,
 738                              const char *buf, size_t count)
 739 {
 740         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 741         int nr = sensor_attr->index;
 742
 743         struct it87_data *data = dev_get_drvdata(dev);
 744         long val;
 745         u8 reg, extra;
 746
 747         if (kstrtol(buf, 10, &val) < 0)
 748                 return -EINVAL;
 749
 750         reg = it87_read_value(data, IT87_REG_TEMP_ENABLE);
 751         reg &= ~(1 << nr);
 752         reg &= ~(8 << nr);
 753         if (has_temp_peci(data, nr) && (reg >> 6 == nr + 1 || val == 6))
 754                 reg &= 0x3f;
 755         extra = it87_read_value(data, IT87_REG_TEMP_EXTRA);
 756         if (has_temp_old_peci(data, nr) && ((extra & 0x80) || val == 6))
 757                 extra &= 0x7f;
 758         if (val == 2) { /* backwards compatibility */
 759                 dev_warn(dev,
 760                          "Sensor type 2 is deprecated, please use 4 instead\n");
 761                 val = 4;
 762         }
 763         /* 3 = thermal diode; 4 = thermistor; 6 = Intel PECI; 0 = disabled */
 764         if (val == 3)
 765                 reg |= 1 << nr;
 766         else if (val == 4)
 767                 reg |= 8 << nr;
 768         else if (has_temp_peci(data, nr) && val == 6)
 769                 reg |= (nr + 1) << 6;
 770         else if (has_temp_old_peci(data, nr) && val == 6)
 771                 extra |= 0x80;
 772         else if (val != 0)
 773                 return -EINVAL;
 774
 775         mutex_lock(&data->update_lock);
 776         data->sensor = reg;
 777         data->extra = extra;
 778         it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor);
 779         if (has_temp_old_peci(data, nr))
 780                 it87_write_value(data, IT87_REG_TEMP_EXTRA, data->extra);
 781         data->valid = 0;        /* Force cache refresh */
 782         mutex_unlock(&data->update_lock);
 783         return count;
 784 }
 785
 786 static SENSOR_DEVICE_ATTR(temp1_type, S_IRUGO | S_IWUSR, show_temp_type,
 787                           set_temp_type, 0);
 788 static SENSOR_DEVICE_ATTR(temp2_type, S_IRUGO | S_IWUSR, show_temp_type,
 789                           set_temp_type, 1);
 790 static SENSOR_DEVICE_ATTR(temp3_type, S_IRUGO | S_IWUSR, show_temp_type,
 791                           set_temp_type, 2);
 792
 793 /* 3 Fans */
 794
 795 static int pwm_mode(const struct it87_data *data, int nr)
 796 {
 797         int ctrl = data->fan_main_ctrl & (1 << nr);
 798
 799         if (ctrl == 0 && data->type != it8603)          /* Full speed */
 800                 return 0;
 801         if (data->pwm_ctrl[nr] & 0x80)                  /* Automatic mode */
 802                 return 2;
 803         else                                            /* Manual mode */
 804                 return 1;
 805 }
 806
 807 static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
 808                         char *buf)
 809 {
 810         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 811         int nr = sattr->nr;
 812         int index = sattr->index;
 813         int speed;
 814         struct it87_data *data = it87_update_device(dev);
 815
 816         speed = has_16bit_fans(data) ?
 817                 FAN16_FROM_REG(data->fan[nr][index]) :
 818                 FAN_FROM_REG(data->fan[nr][index],
 819                              DIV_FROM_REG(data->fan_div[nr]));
 820         return sprintf(buf, "%d\n", speed);
 821 }
 822
 823 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
 824                 char *buf)
 825 {
 826         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 827         int nr = sensor_attr->index;
 828
 829         struct it87_data *data = it87_update_device(dev);
 830         return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
 831 }
 832 static ssize_t show_pwm_enable(struct device *dev,
 833                 struct device_attribute *attr, char *buf)
 834 {
 835         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 836         int nr = sensor_attr->index;
 837
 838         struct it87_data *data = it87_update_device(dev);
 839         return sprintf(buf, "%d\n", pwm_mode(data, nr));
 840 }
 841 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
 842                 char *buf)
 843 {
 844         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 845         int nr = sensor_attr->index;
 846
 847         struct it87_data *data = it87_update_device(dev);
 848         return sprintf(buf, "%d\n",
 849                        pwm_from_reg(data, data->pwm_duty[nr]));
 850 }
 851 static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr,
 852                 char *buf)
 853 {
 854         struct it87_data *data = it87_update_device(dev);
 855         int index = (data->fan_ctl >> 4) & 0x07;
 856         unsigned int freq;
 857
 858         freq = pwm_freq[index] / (has_newer_autopwm(data) ? 256 : 128);
 859
 860         return sprintf(buf, "%u\n", freq);
 861 }
 862
 863 static ssize_t set_fan(struct device *dev, struct device_attribute *attr,
 864                        const char *buf, size_t count)
 865 {
 866         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 867         int nr = sattr->nr;
 868         int index = sattr->index;
 869
 870         struct it87_data *data = dev_get_drvdata(dev);
 871         long val;
 872         u8 reg;
 873
 874         if (kstrtol(buf, 10, &val) < 0)
 875                 return -EINVAL;
 876
 877         mutex_lock(&data->update_lock);
 878
 879         if (has_16bit_fans(data)) {
 880                 data->fan[nr][index] = FAN16_TO_REG(val);
 881                 it87_write_value(data, IT87_REG_FAN_MIN[nr],
 882                                  data->fan[nr][index] & 0xff);
 883                 it87_write_value(data, IT87_REG_FANX_MIN[nr],
 884                                  data->fan[nr][index] >> 8);
 885         } else {
 886                 reg = it87_read_value(data, IT87_REG_FAN_DIV);
 887                 switch (nr) {
 888                 case 0:
 889                         data->fan_div[nr] = reg & 0x07;
 890                         break;
 891                 case 1:
 892                         data->fan_div[nr] = (reg >> 3) & 0x07;
 893                         break;
 894                 case 2:
 895                         data->fan_div[nr] = (reg & 0x40) ? 3 : 1;
 896                         break;
 897                 }
 898                 data->fan[nr][index] =
 899                   FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
 900                 it87_write_value(data, IT87_REG_FAN_MIN[nr],
 901                                  data->fan[nr][index]);
 902         }
 903
 904         mutex_unlock(&data->update_lock);
 905         return count;
 906 }
 907
 908 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
 909                 const char *buf, size_t count)
 910 {
 911         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 912         int nr = sensor_attr->index;
 913
 914         struct it87_data *data = dev_get_drvdata(dev);
 915         unsigned long val;
 916         int min;
 917         u8 old;
 918
 919         if (kstrtoul(buf, 10, &val) < 0)
 920                 return -EINVAL;
 921
 922         mutex_lock(&data->update_lock);
 923         old = it87_read_value(data, IT87_REG_FAN_DIV);
 924
 925         /* Save fan min limit */
 926         min = FAN_FROM_REG(data->fan[nr][1], DIV_FROM_REG(data->fan_div[nr]));
 927
 928         switch (nr) {
 929         case 0:
 930         case 1:
 931                 data->fan_div[nr] = DIV_TO_REG(val);
 932                 break;
 933         case 2:
 934                 if (val < 8)
 935                         data->fan_div[nr] = 1;
 936                 else
 937                         data->fan_div[nr] = 3;
 938         }
 939         val = old & 0x80;
 940         val |= (data->fan_div[0] & 0x07);
 941         val |= (data->fan_div[1] & 0x07) << 3;
 942         if (data->fan_div[2] == 3)
 943                 val |= 0x1 << 6;
 944         it87_write_value(data, IT87_REG_FAN_DIV, val);
 945
 946         /* Restore fan min limit */
 947         data->fan[nr][1] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
 948         it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan[nr][1]);
 949
 950         mutex_unlock(&data->update_lock);
 951         return count;
 952 }
 953
 954 /* Returns 0 if OK, -EINVAL otherwise */
 955 static int check_trip_points(struct device *dev, int nr)
 956 {
 957         const struct it87_data *data = dev_get_drvdata(dev);
 958         int i, err = 0;
 959
 960         if (has_old_autopwm(data)) {
 961                 for (i = 0; i < 3; i++) {
 962                         if (data->auto_temp[nr][i] > data->auto_temp[nr][i + 1])
 963                                 err = -EINVAL;
 964                 }
 965                 for (i = 0; i < 2; i++) {
 966                         if (data->auto_pwm[nr][i] > data->auto_pwm[nr][i + 1])
 967                                 err = -EINVAL;
 968                 }
 969         }
 970
 971         if (err) {
 972                 dev_err(dev,
 973                         "Inconsistent trip points, not switching to automatic mode\n");
 974                 dev_err(dev, "Adjust the trip points and try again\n");
 975         }
 976         return err;
 977 }
 978
 979 static ssize_t set_pwm_enable(struct device *dev,
 980                 struct device_attribute *attr, const char *buf, size_t count)
 981 {
 982         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 983         int nr = sensor_attr->index;
 984
 985         struct it87_data *data = dev_get_drvdata(dev);
 986         long val;
 987
 988         if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 2)
 989                 return -EINVAL;
 990
 991         /* Check trip points before switching to automatic mode */
 992         if (val == 2) {
 993                 if (check_trip_points(dev, nr) < 0)
 994                         return -EINVAL;
 995         }
 996
 997         /* IT8603E does not have on/off mode */
 998         if (val == 0 && data->type == it8603)
 999                 return -EINVAL;
1000
1001         mutex_lock(&data->update_lock);
1002
1003         if (val == 0) {
1004                 int tmp;
1005                 /* make sure the fan is on when in on/off mode */
1006                 tmp = it87_read_value(data, IT87_REG_FAN_CTL);
1007                 it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr));
1008                 /* set on/off mode */
1009                 data->fan_main_ctrl &= ~(1 << nr);
1010                 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
1011                                  data->fan_main_ctrl);
1012         } else {
1013                 if (val == 1)                           /* Manual mode */
1014                         data->pwm_ctrl[nr] = has_newer_autopwm(data) ?
1015                                              data->pwm_temp_map[nr] :
1016                                              data->pwm_duty[nr];
1017                 else                                    /* Automatic mode */
1018                         data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
1019                 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
1020
1021                 if (data->type != it8603) {
1022                         /* set SmartGuardian mode */
1023                         data->fan_main_ctrl |= (1 << nr);
1024                         it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
1025                                          data->fan_main_ctrl);
1026                 }
1027         }
1028
1029         mutex_unlock(&data->update_lock);
1030         return count;
1031 }
1032 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
1033                 const char *buf, size_t count)
1034 {
1035         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1036         int nr = sensor_attr->index;
1037
1038         struct it87_data *data = dev_get_drvdata(dev);
1039         long val;
1040
1041         if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 255)
1042                 return -EINVAL;
1043
1044         mutex_lock(&data->update_lock);
1045         if (has_newer_autopwm(data)) {
1046                 /*
1047                  * If we are in automatic mode, the PWM duty cycle register
1048                  * is read-only so we can't write the value.
1049                  */
1050                 if (data->pwm_ctrl[nr] & 0x80) {
1051                         mutex_unlock(&data->update_lock);
1052                         return -EBUSY;
1053                 }
1054                 data->pwm_duty[nr] = pwm_to_reg(data, val);
1055                 it87_write_value(data, IT87_REG_PWM_DUTY(nr),
1056                                  data->pwm_duty[nr]);
1057         } else {
1058                 data->pwm_duty[nr] = pwm_to_reg(data, val);
1059                 /*
1060                  * If we are in manual mode, write the duty cycle immediately;
1061                  * otherwise, just store it for later use.
1062                  */
1063                 if (!(data->pwm_ctrl[nr] & 0x80)) {
1064                         data->pwm_ctrl[nr] = data->pwm_duty[nr];
1065                         it87_write_value(data, IT87_REG_PWM(nr),
1066                                          data->pwm_ctrl[nr]);
1067                 }
1068         }
1069         mutex_unlock(&data->update_lock);
1070         return count;
1071 }
1072 static ssize_t set_pwm_freq(struct device *dev,
1073                 struct device_attribute *attr, const char *buf, size_t count)
1074 {
1075         struct it87_data *data = dev_get_drvdata(dev);
1076         unsigned long val;
1077         int i;
1078
1079         if (kstrtoul(buf, 10, &val) < 0)
1080                 return -EINVAL;
1081
1082         val = clamp_val(val, 0, 1000000);
1083         val *= has_newer_autopwm(data) ? 256 : 128;
1084
1085         /* Search for the nearest available frequency */
1086         for (i = 0; i < 7; i++) {
1087                 if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2)
1088                         break;
1089         }
1090
1091         mutex_lock(&data->update_lock);
1092         data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL) & 0x8f;
1093         data->fan_ctl |= i << 4;
1094         it87_write_value(data, IT87_REG_FAN_CTL, data->fan_ctl);
1095         mutex_unlock(&data->update_lock);
1096
1097         return count;
1098 }
1099 static ssize_t show_pwm_temp_map(struct device *dev,
1100                 struct device_attribute *attr, char *buf)
1101 {
1102         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1103         int nr = sensor_attr->index;
1104
1105         struct it87_data *data = it87_update_device(dev);
1106         int map;
1107
1108         if (data->pwm_temp_map[nr] < 3)
1109                 map = 1 << data->pwm_temp_map[nr];
1110         else
1111                 map = 0;                        /* Should never happen */
1112         return sprintf(buf, "%d\n", map);
1113 }
1114 static ssize_t set_pwm_temp_map(struct device *dev,
1115                 struct device_attribute *attr, const char *buf, size_t count)
1116 {
1117         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1118         int nr = sensor_attr->index;
1119
1120         struct it87_data *data = dev_get_drvdata(dev);
1121         long val;
1122         u8 reg;
1123
1124         /*
1125          * This check can go away if we ever support automatic fan speed
1126          * control on newer chips.
1127          */
1128         if (!has_old_autopwm(data)) {
1129                 dev_notice(dev, "Mapping change disabled for safety reasons\n");
1130                 return -EINVAL;
1131         }
1132
1133         if (kstrtol(buf, 10, &val) < 0)
1134                 return -EINVAL;
1135
1136         switch (val) {
1137         case (1 << 0):
1138                 reg = 0x00;
1139                 break;
1140         case (1 << 1):
1141                 reg = 0x01;
1142                 break;
1143         case (1 << 2):
1144                 reg = 0x02;
1145                 break;
1146         default:
1147                 return -EINVAL;
1148         }
1149
1150         mutex_lock(&data->update_lock);
1151         data->pwm_temp_map[nr] = reg;
1152         /*
1153          * If we are in automatic mode, write the temp mapping immediately;
1154          * otherwise, just store it for later use.
1155          */
1156         if (data->pwm_ctrl[nr] & 0x80) {
1157                 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
1158                 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
1159         }
1160         mutex_unlock(&data->update_lock);
1161         return count;
1162 }
1163
1164 static ssize_t show_auto_pwm(struct device *dev,
1165                 struct device_attribute *attr, char *buf)
1166 {
1167         struct it87_data *data = it87_update_device(dev);
1168         struct sensor_device_attribute_2 *sensor_attr =
1169                         to_sensor_dev_attr_2(attr);
1170         int nr = sensor_attr->nr;
1171         int point = sensor_attr->index;
1172
1173         return sprintf(buf, "%d\n",
1174                        pwm_from_reg(data, data->auto_pwm[nr][point]));
1175 }
1176
1177 static ssize_t set_auto_pwm(struct device *dev,
1178                 struct device_attribute *attr, const char *buf, size_t count)
1179 {
1180         struct it87_data *data = dev_get_drvdata(dev);
1181         struct sensor_device_attribute_2 *sensor_attr =
1182                         to_sensor_dev_attr_2(attr);
1183         int nr = sensor_attr->nr;
1184         int point = sensor_attr->index;
1185         long val;
1186
1187         if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 255)
1188                 return -EINVAL;
1189
1190         mutex_lock(&data->update_lock);
1191         data->auto_pwm[nr][point] = pwm_to_reg(data, val);
1192         it87_write_value(data, IT87_REG_AUTO_PWM(nr, point),
1193                          data->auto_pwm[nr][point]);
1194         mutex_unlock(&data->update_lock);
1195         return count;
1196 }
1197
1198 static ssize_t show_auto_temp(struct device *dev,
1199                 struct device_attribute *attr, char *buf)
1200 {
1201         struct it87_data *data = it87_update_device(dev);
1202         struct sensor_device_attribute_2 *sensor_attr =
1203                         to_sensor_dev_attr_2(attr);
1204         int nr = sensor_attr->nr;
1205         int point = sensor_attr->index;
1206
1207         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->auto_temp[nr][point]));
1208 }
1209
1210 static ssize_t set_auto_temp(struct device *dev,
1211                 struct device_attribute *attr, const char *buf, size_t count)
1212 {
1213         struct it87_data *data = dev_get_drvdata(dev);
1214         struct sensor_device_attribute_2 *sensor_attr =
1215                         to_sensor_dev_attr_2(attr);
1216         int nr = sensor_attr->nr;
1217         int point = sensor_attr->index;
1218         long val;
1219
1220         if (kstrtol(buf, 10, &val) < 0 || val < -128000 || val > 127000)
1221                 return -EINVAL;
1222
1223         mutex_lock(&data->update_lock);
1224         data->auto_temp[nr][point] = TEMP_TO_REG(val);
1225         it87_write_value(data, IT87_REG_AUTO_TEMP(nr, point),
1226                          data->auto_temp[nr][point]);
1227         mutex_unlock(&data->update_lock);
1228         return count;
1229 }
1230
1231 static SENSOR_DEVICE_ATTR_2(fan1_input, S_IRUGO, show_fan, NULL, 0, 0);
1232 static SENSOR_DEVICE_ATTR_2(fan1_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1233                             0, 1);
1234 static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR, show_fan_div,
1235                           set_fan_div, 0);
1236
1237 static SENSOR_DEVICE_ATTR_2(fan2_input, S_IRUGO, show_fan, NULL, 1, 0);
1238 static SENSOR_DEVICE_ATTR_2(fan2_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1239                             1, 1);
1240 static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR, show_fan_div,
1241                           set_fan_div, 1);
1242
1243 static SENSOR_DEVICE_ATTR_2(fan3_input, S_IRUGO, show_fan, NULL, 2, 0);
1244 static SENSOR_DEVICE_ATTR_2(fan3_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1245                             2, 1);
1246 static SENSOR_DEVICE_ATTR(fan3_div, S_IRUGO | S_IWUSR, show_fan_div,
1247                           set_fan_div, 2);
1248
1249 static SENSOR_DEVICE_ATTR_2(fan4_input, S_IRUGO, show_fan, NULL, 3, 0);
1250 static SENSOR_DEVICE_ATTR_2(fan4_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1251                             3, 1);
1252
1253 static SENSOR_DEVICE_ATTR_2(fan5_input, S_IRUGO, show_fan, NULL, 4, 0);
1254 static SENSOR_DEVICE_ATTR_2(fan5_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1255                             4, 1);
1256
1257 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR,
1258                           show_pwm_enable, set_pwm_enable, 0);
1259 static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm, set_pwm, 0);
1260 static DEVICE_ATTR(pwm1_freq, S_IRUGO | S_IWUSR, show_pwm_freq, set_pwm_freq);
1261 static SENSOR_DEVICE_ATTR(pwm1_auto_channels_temp, S_IRUGO | S_IWUSR,
1262                           show_pwm_temp_map, set_pwm_temp_map, 0);
1263 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_pwm, S_IRUGO | S_IWUSR,
1264                             show_auto_pwm, set_auto_pwm, 0, 0);
1265 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point2_pwm, S_IRUGO | S_IWUSR,
1266                             show_auto_pwm, set_auto_pwm, 0, 1);
1267 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point3_pwm, S_IRUGO | S_IWUSR,
1268                             show_auto_pwm, set_auto_pwm, 0, 2);
1269 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point4_pwm, S_IRUGO,
1270                             show_auto_pwm, NULL, 0, 3);
1271 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_temp, S_IRUGO | S_IWUSR,
1272                             show_auto_temp, set_auto_temp, 0, 1);
1273 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_temp_hyst, S_IRUGO | S_IWUSR,
1274                             show_auto_temp, set_auto_temp, 0, 0);
1275 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point2_temp, S_IRUGO | S_IWUSR,
1276                             show_auto_temp, set_auto_temp, 0, 2);
1277 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point3_temp, S_IRUGO | S_IWUSR,
1278                             show_auto_temp, set_auto_temp, 0, 3);
1279 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point4_temp, S_IRUGO | S_IWUSR,
1280                             show_auto_temp, set_auto_temp, 0, 4);
1281
1282 static SENSOR_DEVICE_ATTR(pwm2_enable, S_IRUGO | S_IWUSR,
1283                           show_pwm_enable, set_pwm_enable, 1);
1284 static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, show_pwm, set_pwm, 1);
1285 static DEVICE_ATTR(pwm2_freq, S_IRUGO, show_pwm_freq, NULL);
1286 static SENSOR_DEVICE_ATTR(pwm2_auto_channels_temp, S_IRUGO | S_IWUSR,
1287                           show_pwm_temp_map, set_pwm_temp_map, 1);
1288 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_pwm, S_IRUGO | S_IWUSR,
1289                             show_auto_pwm, set_auto_pwm, 1, 0);
1290 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point2_pwm, S_IRUGO | S_IWUSR,
1291                             show_auto_pwm, set_auto_pwm, 1, 1);
1292 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point3_pwm, S_IRUGO | S_IWUSR,
1293                             show_auto_pwm, set_auto_pwm, 1, 2);
1294 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point4_pwm, S_IRUGO,
1295                             show_auto_pwm, NULL, 1, 3);
1296 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_temp, S_IRUGO | S_IWUSR,
1297                             show_auto_temp, set_auto_temp, 1, 1);
1298 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_temp_hyst, S_IRUGO | S_IWUSR,
1299                             show_auto_temp, set_auto_temp, 1, 0);
1300 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point2_temp, S_IRUGO | S_IWUSR,
1301                             show_auto_temp, set_auto_temp, 1, 2);
1302 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point3_temp, S_IRUGO | S_IWUSR,
1303                             show_auto_temp, set_auto_temp, 1, 3);
1304 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point4_temp, S_IRUGO | S_IWUSR,
1305                             show_auto_temp, set_auto_temp, 1, 4);
1306
1307 static SENSOR_DEVICE_ATTR(pwm3_enable, S_IRUGO | S_IWUSR,
1308                           show_pwm_enable, set_pwm_enable, 2);
1309 static SENSOR_DEVICE_ATTR(pwm3, S_IRUGO | S_IWUSR, show_pwm, set_pwm, 2);
1310 static DEVICE_ATTR(pwm3_freq, S_IRUGO, show_pwm_freq, NULL);
1311 static SENSOR_DEVICE_ATTR(pwm3_auto_channels_temp, S_IRUGO | S_IWUSR,
1312                           show_pwm_temp_map, set_pwm_temp_map, 2);
1313 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_pwm, S_IRUGO | S_IWUSR,
1314                             show_auto_pwm, set_auto_pwm, 2, 0);
1315 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point2_pwm, S_IRUGO | S_IWUSR,
1316                             show_auto_pwm, set_auto_pwm, 2, 1);
1317 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point3_pwm, S_IRUGO | S_IWUSR,
1318                             show_auto_pwm, set_auto_pwm, 2, 2);
1319 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point4_pwm, S_IRUGO,
1320                             show_auto_pwm, NULL, 2, 3);
1321 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_temp, S_IRUGO | S_IWUSR,
1322                             show_auto_temp, set_auto_temp, 2, 1);
1323 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_temp_hyst, S_IRUGO | S_IWUSR,
1324                             show_auto_temp, set_auto_temp, 2, 0);
1325 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point2_temp, S_IRUGO | S_IWUSR,
1326                             show_auto_temp, set_auto_temp, 2, 2);
1327 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point3_temp, S_IRUGO | S_IWUSR,
1328                             show_auto_temp, set_auto_temp, 2, 3);
1329 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point4_temp, S_IRUGO | S_IWUSR,
1330                             show_auto_temp, set_auto_temp, 2, 4);
1331
1332 /* Alarms */
1333 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
1334                 char *buf)
1335 {
1336         struct it87_data *data = it87_update_device(dev);
1337         return sprintf(buf, "%u\n", data->alarms);
1338 }
1339 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
1340
1341 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
1342                 char *buf)
1343 {
1344         int bitnr = to_sensor_dev_attr(attr)->index;
1345         struct it87_data *data = it87_update_device(dev);
1346         return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
1347 }
1348
1349 static ssize_t clear_intrusion(struct device *dev, struct device_attribute
1350                 *attr, const char *buf, size_t count)
1351 {
1352         struct it87_data *data = dev_get_drvdata(dev);
1353         long val;
1354         int config;
1355
1356         if (kstrtol(buf, 10, &val) < 0 || val != 0)
1357                 return -EINVAL;
1358
1359         mutex_lock(&data->update_lock);
1360         config = it87_read_value(data, IT87_REG_CONFIG);
1361         if (config < 0) {
1362                 count = config;
1363         } else {
1364                 config |= 1 << 5;
1365                 it87_write_value(data, IT87_REG_CONFIG, config);
1366                 /* Invalidate cache to force re-read */
1367                 data->valid = 0;
1368         }
1369         mutex_unlock(&data->update_lock);
1370
1371         return count;
1372 }
1373
1374 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8);
1375 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9);
1376 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10);
1377 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 11);
1378 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 12);
1379 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 13);
1380 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 14);
1381 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 15);
1382 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 0);
1383 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1);
1384 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 2);
1385 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 3);
1386 static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6);
1387 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16);
1388 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17);
1389 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18);
1390 static SENSOR_DEVICE_ATTR(intrusion0_alarm, S_IRUGO | S_IWUSR,
1391                           show_alarm, clear_intrusion, 4);
1392
1393 static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
1394                 char *buf)
1395 {
1396         int bitnr = to_sensor_dev_attr(attr)->index;
1397         struct it87_data *data = it87_update_device(dev);
1398         return sprintf(buf, "%u\n", (data->beeps >> bitnr) & 1);
1399 }
1400 static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
1401                 const char *buf, size_t count)
1402 {
1403         int bitnr = to_sensor_dev_attr(attr)->index;
1404         struct it87_data *data = dev_get_drvdata(dev);
1405         long val;
1406
1407         if (kstrtol(buf, 10, &val) < 0
1408          || (val != 0 && val != 1))
1409                 return -EINVAL;
1410
1411         mutex_lock(&data->update_lock);
1412         data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
1413         if (val)
1414                 data->beeps |= (1 << bitnr);
1415         else
1416                 data->beeps &= ~(1 << bitnr);
1417         it87_write_value(data, IT87_REG_BEEP_ENABLE, data->beeps);
1418         mutex_unlock(&data->update_lock);
1419         return count;
1420 }
1421
1422 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR,
1423                           show_beep, set_beep, 1);
1424 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO, show_beep, NULL, 1);
1425 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO, show_beep, NULL, 1);
1426 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO, show_beep, NULL, 1);
1427 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO, show_beep, NULL, 1);
1428 static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO, show_beep, NULL, 1);
1429 static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO, show_beep, NULL, 1);
1430 static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO, show_beep, NULL, 1);
1431 /* fanX_beep writability is set later */
1432 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO, show_beep, set_beep, 0);
1433 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO, show_beep, set_beep, 0);
1434 static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO, show_beep, set_beep, 0);
1435 static SENSOR_DEVICE_ATTR(fan4_beep, S_IRUGO, show_beep, set_beep, 0);
1436 static SENSOR_DEVICE_ATTR(fan5_beep, S_IRUGO, show_beep, set_beep, 0);
1437 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR,
1438                           show_beep, set_beep, 2);
1439 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO, show_beep, NULL, 2);
1440 static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO, show_beep, NULL, 2);
1441
1442 static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr,
1443                 char *buf)
1444 {
1445         struct it87_data *data = dev_get_drvdata(dev);
1446         return sprintf(buf, "%u\n", data->vrm);
1447 }
1448 static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr,
1449                 const char *buf, size_t count)
1450 {
1451         struct it87_data *data = dev_get_drvdata(dev);
1452         unsigned long val;
1453
1454         if (kstrtoul(buf, 10, &val) < 0)
1455                 return -EINVAL;
1456
1457         data->vrm = val;
1458
1459         return count;
1460 }
1461 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
1462
1463 static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr,
1464                 char *buf)
1465 {
1466         struct it87_data *data = it87_update_device(dev);
1467         return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm));
1468 }
1469 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
1470
1471 static ssize_t show_label(struct device *dev, struct device_attribute *attr,
1472                 char *buf)
1473 {
1474         static const char * const labels[] = {
1475                 "+5V",
1476                 "5VSB",
1477                 "Vbat",
1478         };
1479         static const char * const labels_it8721[] = {
1480                 "+3.3V",
1481                 "3VSB",
1482                 "Vbat",
1483         };
1484         struct it87_data *data = dev_get_drvdata(dev);
1485         int nr = to_sensor_dev_attr(attr)->index;
1486
1487         return sprintf(buf, "%s\n", has_12mv_adc(data) ? labels_it8721[nr]
1488                                                        : labels[nr]);
1489 }
1490 static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_label, NULL, 0);
1491 static SENSOR_DEVICE_ATTR(in7_label, S_IRUGO, show_label, NULL, 1);
1492 static SENSOR_DEVICE_ATTR(in8_label, S_IRUGO, show_label, NULL, 2);
1493 /* special AVCC3 IT8603E in9 */
1494 static SENSOR_DEVICE_ATTR(in9_label, S_IRUGO, show_label, NULL, 0);
1495
1496 static ssize_t show_name(struct device *dev, struct device_attribute
1497                          *devattr, char *buf)
1498 {
1499         struct it87_data *data = dev_get_drvdata(dev);
1500         return sprintf(buf, "%s\n", data->name);
1501 }
1502 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
1503
1504 static struct attribute *it87_attributes_in[10][5] = {
1505 {
1506         &sensor_dev_attr_in0_input.dev_attr.attr,
1507         &sensor_dev_attr_in0_min.dev_attr.attr,
1508         &sensor_dev_attr_in0_max.dev_attr.attr,
1509         &sensor_dev_attr_in0_alarm.dev_attr.attr,
1510         NULL
1511 }, {
1512         &sensor_dev_attr_in1_input.dev_attr.attr,
1513         &sensor_dev_attr_in1_min.dev_attr.attr,
1514         &sensor_dev_attr_in1_max.dev_attr.attr,
1515         &sensor_dev_attr_in1_alarm.dev_attr.attr,
1516         NULL
1517 }, {
1518         &sensor_dev_attr_in2_input.dev_attr.attr,
1519         &sensor_dev_attr_in2_min.dev_attr.attr,
1520         &sensor_dev_attr_in2_max.dev_attr.attr,
1521         &sensor_dev_attr_in2_alarm.dev_attr.attr,
1522         NULL
1523 }, {
1524         &sensor_dev_attr_in3_input.dev_attr.attr,
1525         &sensor_dev_attr_in3_min.dev_attr.attr,
1526         &sensor_dev_attr_in3_max.dev_attr.attr,
1527         &sensor_dev_attr_in3_alarm.dev_attr.attr,
1528         NULL
1529 }, {
1530         &sensor_dev_attr_in4_input.dev_attr.attr,
1531         &sensor_dev_attr_in4_min.dev_attr.attr,
1532         &sensor_dev_attr_in4_max.dev_attr.attr,
1533         &sensor_dev_attr_in4_alarm.dev_attr.attr,
1534         NULL
1535 }, {
1536         &sensor_dev_attr_in5_input.dev_attr.attr,
1537         &sensor_dev_attr_in5_min.dev_attr.attr,
1538         &sensor_dev_attr_in5_max.dev_attr.attr,
1539         &sensor_dev_attr_in5_alarm.dev_attr.attr,
1540         NULL
1541 }, {
1542         &sensor_dev_attr_in6_input.dev_attr.attr,
1543         &sensor_dev_attr_in6_min.dev_attr.attr,
1544         &sensor_dev_attr_in6_max.dev_attr.attr,
1545         &sensor_dev_attr_in6_alarm.dev_attr.attr,
1546         NULL
1547 }, {
1548         &sensor_dev_attr_in7_input.dev_attr.attr,
1549         &sensor_dev_attr_in7_min.dev_attr.attr,
1550         &sensor_dev_attr_in7_max.dev_attr.attr,
1551         &sensor_dev_attr_in7_alarm.dev_attr.attr,
1552         NULL
1553 }, {
1554         &sensor_dev_attr_in8_input.dev_attr.attr,
1555         NULL
1556 }, {
1557         &sensor_dev_attr_in9_input.dev_attr.attr,
1558         NULL
1559 } };
1560
1561 static const struct attribute_group it87_group_in[10] = {
1562         { .attrs = it87_attributes_in[0] },
1563         { .attrs = it87_attributes_in[1] },
1564         { .attrs = it87_attributes_in[2] },
1565         { .attrs = it87_attributes_in[3] },
1566         { .attrs = it87_attributes_in[4] },
1567         { .attrs = it87_attributes_in[5] },
1568         { .attrs = it87_attributes_in[6] },
1569         { .attrs = it87_attributes_in[7] },
1570         { .attrs = it87_attributes_in[8] },
1571         { .attrs = it87_attributes_in[9] },
1572 };
1573
1574 static struct attribute *it87_attributes_temp[3][6] = {
1575 {
1576         &sensor_dev_attr_temp1_input.dev_attr.attr,
1577         &sensor_dev_attr_temp1_max.dev_attr.attr,
1578         &sensor_dev_attr_temp1_min.dev_attr.attr,
1579         &sensor_dev_attr_temp1_type.dev_attr.attr,
1580         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1581         NULL
1582 } , {
1583         &sensor_dev_attr_temp2_input.dev_attr.attr,
1584         &sensor_dev_attr_temp2_max.dev_attr.attr,
1585         &sensor_dev_attr_temp2_min.dev_attr.attr,
1586         &sensor_dev_attr_temp2_type.dev_attr.attr,
1587         &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1588         NULL
1589 } , {
1590         &sensor_dev_attr_temp3_input.dev_attr.attr,
1591         &sensor_dev_attr_temp3_max.dev_attr.attr,
1592         &sensor_dev_attr_temp3_min.dev_attr.attr,
1593         &sensor_dev_attr_temp3_type.dev_attr.attr,
1594         &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1595         NULL
1596 } };
1597
1598 static const struct attribute_group it87_group_temp[3] = {
1599         { .attrs = it87_attributes_temp[0] },
1600         { .attrs = it87_attributes_temp[1] },
1601         { .attrs = it87_attributes_temp[2] },
1602 };
1603
1604 static struct attribute *it87_attributes_temp_offset[] = {
1605         &sensor_dev_attr_temp1_offset.dev_attr.attr,
1606         &sensor_dev_attr_temp2_offset.dev_attr.attr,
1607         &sensor_dev_attr_temp3_offset.dev_attr.attr,
1608 };
1609
1610 static struct attribute *it87_attributes[] = {
1611         &dev_attr_alarms.attr,
1612         &sensor_dev_attr_intrusion0_alarm.dev_attr.attr,
1613         &dev_attr_name.attr,
1614         NULL
1615 };
1616
1617 static const struct attribute_group it87_group = {
1618         .attrs = it87_attributes,
1619 };
1620
1621 static struct attribute *it87_attributes_in_beep[] = {
1622         &sensor_dev_attr_in0_beep.dev_attr.attr,
1623         &sensor_dev_attr_in1_beep.dev_attr.attr,
1624         &sensor_dev_attr_in2_beep.dev_attr.attr,
1625         &sensor_dev_attr_in3_beep.dev_attr.attr,
1626         &sensor_dev_attr_in4_beep.dev_attr.attr,
1627         &sensor_dev_attr_in5_beep.dev_attr.attr,
1628         &sensor_dev_attr_in6_beep.dev_attr.attr,
1629         &sensor_dev_attr_in7_beep.dev_attr.attr,
1630         NULL,
1631         NULL,
1632 };
1633
1634 static struct attribute *it87_attributes_temp_beep[] = {
1635         &sensor_dev_attr_temp1_beep.dev_attr.attr,
1636         &sensor_dev_attr_temp2_beep.dev_attr.attr,
1637         &sensor_dev_attr_temp3_beep.dev_attr.attr,
1638 };
1639
1640 static struct attribute *it87_attributes_fan[5][3+1] = { {
1641         &sensor_dev_attr_fan1_input.dev_attr.attr,
1642         &sensor_dev_attr_fan1_min.dev_attr.attr,
1643         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1644         NULL
1645 }, {
1646         &sensor_dev_attr_fan2_input.dev_attr.attr,
1647         &sensor_dev_attr_fan2_min.dev_attr.attr,
1648         &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1649         NULL
1650 }, {
1651         &sensor_dev_attr_fan3_input.dev_attr.attr,
1652         &sensor_dev_attr_fan3_min.dev_attr.attr,
1653         &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1654         NULL
1655 }, {
1656         &sensor_dev_attr_fan4_input.dev_attr.attr,
1657         &sensor_dev_attr_fan4_min.dev_attr.attr,
1658         &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1659         NULL
1660 }, {
1661         &sensor_dev_attr_fan5_input.dev_attr.attr,
1662         &sensor_dev_attr_fan5_min.dev_attr.attr,
1663         &sensor_dev_attr_fan5_alarm.dev_attr.attr,
1664         NULL
1665 } };
1666
1667 static const struct attribute_group it87_group_fan[5] = {
1668         { .attrs = it87_attributes_fan[0] },
1669         { .attrs = it87_attributes_fan[1] },
1670         { .attrs = it87_attributes_fan[2] },
1671         { .attrs = it87_attributes_fan[3] },
1672         { .attrs = it87_attributes_fan[4] },
1673 };
1674
1675 static const struct attribute *it87_attributes_fan_div[] = {
1676         &sensor_dev_attr_fan1_div.dev_attr.attr,
1677         &sensor_dev_attr_fan2_div.dev_attr.attr,
1678         &sensor_dev_attr_fan3_div.dev_attr.attr,
1679 };
1680
1681 static struct attribute *it87_attributes_pwm[3][4+1] = { {
1682         &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1683         &sensor_dev_attr_pwm1.dev_attr.attr,
1684         &dev_attr_pwm1_freq.attr,
1685         &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1686         NULL
1687 }, {
1688         &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1689         &sensor_dev_attr_pwm2.dev_attr.attr,
1690         &dev_attr_pwm2_freq.attr,
1691         &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1692         NULL
1693 }, {
1694         &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1695         &sensor_dev_attr_pwm3.dev_attr.attr,
1696         &dev_attr_pwm3_freq.attr,
1697         &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1698         NULL
1699 } };
1700
1701 static const struct attribute_group it87_group_pwm[3] = {
1702         { .attrs = it87_attributes_pwm[0] },
1703         { .attrs = it87_attributes_pwm[1] },
1704         { .attrs = it87_attributes_pwm[2] },
1705 };
1706
1707 static struct attribute *it87_attributes_autopwm[3][9+1] = { {
1708         &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1709         &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1710         &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
1711         &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr,
1712         &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
1713         &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr,
1714         &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
1715         &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
1716         &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr,
1717         NULL
1718 }, {
1719         &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1720         &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1721         &sensor_dev_attr_pwm2_auto_point3_pwm.dev_attr.attr,
1722         &sensor_dev_attr_pwm2_auto_point4_pwm.dev_attr.attr,
1723         &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
1724         &sensor_dev_attr_pwm2_auto_point1_temp_hyst.dev_attr.attr,
1725         &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
1726         &sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr,
1727         &sensor_dev_attr_pwm2_auto_point4_temp.dev_attr.attr,
1728         NULL
1729 }, {
1730         &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1731         &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1732         &sensor_dev_attr_pwm3_auto_point3_pwm.dev_attr.attr,
1733         &sensor_dev_attr_pwm3_auto_point4_pwm.dev_attr.attr,
1734         &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
1735         &sensor_dev_attr_pwm3_auto_point1_temp_hyst.dev_attr.attr,
1736         &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
1737         &sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr,
1738         &sensor_dev_attr_pwm3_auto_point4_temp.dev_attr.attr,
1739         NULL
1740 } };
1741
1742 static const struct attribute_group it87_group_autopwm[3] = {
1743         { .attrs = it87_attributes_autopwm[0] },
1744         { .attrs = it87_attributes_autopwm[1] },
1745         { .attrs = it87_attributes_autopwm[2] },
1746 };
1747
1748 static struct attribute *it87_attributes_fan_beep[] = {
1749         &sensor_dev_attr_fan1_beep.dev_attr.attr,
1750         &sensor_dev_attr_fan2_beep.dev_attr.attr,
1751         &sensor_dev_attr_fan3_beep.dev_attr.attr,
1752         &sensor_dev_attr_fan4_beep.dev_attr.attr,
1753         &sensor_dev_attr_fan5_beep.dev_attr.attr,
1754 };
1755
1756 static struct attribute *it87_attributes_vid[] = {
1757         &dev_attr_vrm.attr,
1758         &dev_attr_cpu0_vid.attr,
1759         NULL
1760 };
1761
1762 static const struct attribute_group it87_group_vid = {
1763         .attrs = it87_attributes_vid,
1764 };
1765
1766 static struct attribute *it87_attributes_label[] = {
1767         &sensor_dev_attr_in3_label.dev_attr.attr,
1768         &sensor_dev_attr_in7_label.dev_attr.attr,
1769         &sensor_dev_attr_in8_label.dev_attr.attr,
1770         &sensor_dev_attr_in9_label.dev_attr.attr,
1771         NULL
1772 };
1773
1774 static const struct attribute_group it87_group_label = {
1775         .attrs = it87_attributes_label,
1776 };
1777
1778 /* SuperIO detection - will change isa_address if a chip is found */
1779 static int __init it87_find(unsigned short *address,
1780         struct it87_sio_data *sio_data)
1781 {
1782         int err;
1783         u16 chip_type;
1784         const char *board_vendor, *board_name;
1785
1786         err = superio_enter();
1787         if (err)
1788                 return err;
1789
1790         err = -ENODEV;
1791         chip_type = force_id ? force_id : superio_inw(DEVID);
1792
1793         switch (chip_type) {
1794         case IT8705F_DEVID:
1795                 sio_data->type = it87;
1796                 break;
1797         case IT8712F_DEVID:
1798                 sio_data->type = it8712;
1799                 break;
1800         case IT8716F_DEVID:
1801         case IT8726F_DEVID:
1802                 sio_data->type = it8716;
1803                 break;
1804         case IT8718F_DEVID:
1805                 sio_data->type = it8718;
1806                 break;
1807         case IT8720F_DEVID:
1808                 sio_data->type = it8720;
1809                 break;
1810         case IT8721F_DEVID:
1811                 sio_data->type = it8721;
1812                 break;
1813         case IT8728F_DEVID:
1814                 sio_data->type = it8728;
1815                 break;
1816         case IT8771E_DEVID:
1817                 sio_data->type = it8771;
1818                 break;
1819         case IT8772E_DEVID:
1820                 sio_data->type = it8772;
1821                 break;
1822         case IT8781F_DEVID:
1823                 sio_data->type = it8781;
1824                 break;
1825         case IT8782F_DEVID:
1826                 sio_data->type = it8782;
1827                 break;
1828         case IT8783E_DEVID:
1829                 sio_data->type = it8783;
1830                 break;
1831         case IT8786E_DEVID:
1832                 sio_data->type = it8786;
1833                 break;
1834         case IT8603E_DEVID:
1835         case IT8623E_DEVID:
1836                 sio_data->type = it8603;
1837                 break;
1838         case 0xffff:    /* No device at all */
1839                 goto exit;
1840         default:
1841                 pr_debug("Unsupported chip (DEVID=0x%x)\n", chip_type);
1842                 goto exit;
1843         }
1844
1845         superio_select(PME);
1846         if (!(superio_inb(IT87_ACT_REG) & 0x01)) {
1847                 pr_info("Device not activated, skipping\n");
1848                 goto exit;
1849         }
1850
1851         *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1);
1852         if (*address == 0) {
1853                 pr_info("Base address not set, skipping\n");
1854                 goto exit;
1855         }
1856
1857         err = 0;
1858         sio_data->revision = superio_inb(DEVREV) & 0x0f;
1859         pr_info("Found IT%04x%s chip at 0x%x, revision %d\n", chip_type,
1860                 it87_devices[sio_data->type].suffix,
1861                 *address, sio_data->revision);
1862
1863         /* in8 (Vbat) is always internal */
1864         sio_data->internal = (1 << 2);
1865         /* Only the IT8603E has in9 */
1866         if (sio_data->type != it8603)
1867                 sio_data->skip_in |= (1 << 9);
1868
1869         if (!(it87_devices[sio_data->type].features & FEAT_VID))
1870                 sio_data->skip_vid = 1;
1871
1872         /* Read GPIO config and VID value from LDN 7 (GPIO) */
1873         if (sio_data->type == it87) {
1874                 /* The IT8705F has a different LD number for GPIO */
1875                 superio_select(5);
1876                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1877         } else if (sio_data->type == it8783) {
1878                 int reg25, reg27, reg2a, reg2c, regef;
1879
1880                 superio_select(GPIO);
1881
1882                 reg25 = superio_inb(IT87_SIO_GPIO1_REG);
1883                 reg27 = superio_inb(IT87_SIO_GPIO3_REG);
1884                 reg2a = superio_inb(IT87_SIO_PINX1_REG);
1885                 reg2c = superio_inb(IT87_SIO_PINX2_REG);
1886                 regef = superio_inb(IT87_SIO_SPI_REG);
1887
1888                 /* Check if fan3 is there or not */
1889                 if ((reg27 & (1 << 0)) || !(reg2c & (1 << 2)))
1890                         sio_data->skip_fan |= (1 << 2);
1891                 if ((reg25 & (1 << 4))
1892                     || (!(reg2a & (1 << 1)) && (regef & (1 << 0))))
1893                         sio_data->skip_pwm |= (1 << 2);
1894
1895                 /* Check if fan2 is there or not */
1896                 if (reg27 & (1 << 7))
1897                         sio_data->skip_fan |= (1 << 1);
1898                 if (reg27 & (1 << 3))
1899                         sio_data->skip_pwm |= (1 << 1);
1900
1901                 /* VIN5 */
1902                 if ((reg27 & (1 << 0)) || (reg2c & (1 << 2)))
1903                         sio_data->skip_in |= (1 << 5); /* No VIN5 */
1904
1905                 /* VIN6 */
1906                 if (reg27 & (1 << 1))
1907                         sio_data->skip_in |= (1 << 6); /* No VIN6 */
1908
1909                 /*
1910                  * VIN7
1911                  * Does not depend on bit 2 of Reg2C, contrary to datasheet.
1912                  */
1913                 if (reg27 & (1 << 2)) {
1914                         /*
1915                          * The data sheet is a bit unclear regarding the
1916                          * internal voltage divider for VCCH5V. It says
1917                          * "This bit enables and switches VIN7 (pin 91) to the
1918                          * internal voltage divider for VCCH5V".
1919                          * This is different to other chips, where the internal
1920                          * voltage divider would connect VIN7 to an internal
1921                          * voltage source. Maybe that is the case here as well.
1922                          *
1923                          * Since we don't know for sure, re-route it if that is
1924                          * not the case, and ask the user to report if the
1925                          * resulting voltage is sane.
1926                          */
1927                         if (!(reg2c & (1 << 1))) {
1928                                 reg2c |= (1 << 1);
1929                                 superio_outb(IT87_SIO_PINX2_REG, reg2c);
1930                                 pr_notice("Routing internal VCCH5V to in7.\n");
1931                         }
1932                         pr_notice("in7 routed to internal voltage divider, with external pin disabled.\n");
1933                         pr_notice("Please report if it displays a reasonable voltage.\n");
1934                 }
1935
1936                 if (reg2c & (1 << 0))
1937                         sio_data->internal |= (1 << 0);
1938                 if (reg2c & (1 << 1))
1939                         sio_data->internal |= (1 << 1);
1940
1941                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1942         } else if (sio_data->type == it8603) {
1943                 int reg27, reg29;
1944
1945                 superio_select(GPIO);
1946
1947                 reg27 = superio_inb(IT87_SIO_GPIO3_REG);
1948
1949                 /* Check if fan3 is there or not */
1950                 if (reg27 & (1 << 6))
1951                         sio_data->skip_pwm |= (1 << 2);
1952                 if (reg27 & (1 << 7))
1953                         sio_data->skip_fan |= (1 << 2);
1954
1955                 /* Check if fan2 is there or not */
1956                 reg29 = superio_inb(IT87_SIO_GPIO5_REG);
1957                 if (reg29 & (1 << 1))
1958                         sio_data->skip_pwm |= (1 << 1);
1959                 if (reg29 & (1 << 2))
1960                         sio_data->skip_fan |= (1 << 1);
1961
1962                 sio_data->skip_in |= (1 << 5); /* No VIN5 */
1963                 sio_data->skip_in |= (1 << 6); /* No VIN6 */
1964
1965                 sio_data->internal |= (1 << 1); /* in7 is VSB */
1966                 sio_data->internal |= (1 << 3); /* in9 is AVCC */
1967
1968                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1969         } else {
1970                 int reg;
1971                 bool uart6;
1972
1973                 superio_select(GPIO);
1974
1975                 reg = superio_inb(IT87_SIO_GPIO3_REG);
1976                 if (!sio_data->skip_vid) {
1977                         /* We need at least 4 VID pins */
1978                         if (reg & 0x0f) {
1979                                 pr_info("VID is disabled (pins used for GPIO)\n");
1980                                 sio_data->skip_vid = 1;
1981                         }
1982                 }
1983
1984                 /* Check if fan3 is there or not */
1985                 if (reg & (1 << 6))
1986                         sio_data->skip_pwm |= (1 << 2);
1987                 if (reg & (1 << 7))
1988                         sio_data->skip_fan |= (1 << 2);
1989
1990                 /* Check if fan2 is there or not */
1991                 reg = superio_inb(IT87_SIO_GPIO5_REG);
1992                 if (reg & (1 << 1))
1993                         sio_data->skip_pwm |= (1 << 1);
1994                 if (reg & (1 << 2))
1995                         sio_data->skip_fan |= (1 << 1);
1996
1997                 if ((sio_data->type == it8718 || sio_data->type == it8720)
1998                  && !(sio_data->skip_vid))
1999                         sio_data->vid_value = superio_inb(IT87_SIO_VID_REG);
2000
2001                 reg = superio_inb(IT87_SIO_PINX2_REG);
2002
2003                 uart6 = sio_data->type == it8782 && (reg & (1 << 2));
2004
2005                 /*
2006                  * The IT8720F has no VIN7 pin, so VCCH should always be
2007                  * routed internally to VIN7 with an internal divider.
2008                  * Curiously, there still is a configuration bit to control
2009                  * this, which means it can be set incorrectly. And even
2010                  * more curiously, many boards out there are improperly
2011                  * configured, even though the IT8720F datasheet claims
2012                  * that the internal routing of VCCH to VIN7 is the default
2013                  * setting. So we force the internal routing in this case.
2014                  *
2015                  * On IT8782F, VIN7 is multiplexed with one of the UART6 pins.
2016                  * If UART6 is enabled, re-route VIN7 to the internal divider
2017                  * if that is not already the case.
2018                  */
2019                 if ((sio_data->type == it8720 || uart6) && !(reg & (1 << 1))) {
2020                         reg |= (1 << 1);
2021                         superio_outb(IT87_SIO_PINX2_REG, reg);
2022                         pr_notice("Routing internal VCCH to in7\n");
2023                 }
2024                 if (reg & (1 << 0))
2025                         sio_data->internal |= (1 << 0);
2026                 if ((reg & (1 << 1)) || sio_data->type == it8721 ||
2027                     sio_data->type == it8728 || sio_data->type == it8771 ||
2028                     sio_data->type == it8772 || sio_data->type == it8786)
2029                         sio_data->internal |= (1 << 1);
2030
2031                 /*
2032                  * On IT8782F, UART6 pins overlap with VIN5, VIN6, and VIN7.
2033                  * While VIN7 can be routed to the internal voltage divider,
2034                  * VIN5 and VIN6 are not available if UART6 is enabled.
2035                  *
2036                  * Also, temp3 is not available if UART6 is enabled and TEMPIN3
2037                  * is the temperature source. Since we can not read the
2038                  * temperature source here, skip_temp is preliminary.
2039                  */
2040                 if (uart6) {
2041                         sio_data->skip_in |= (1 << 5) | (1 << 6);
2042                         sio_data->skip_temp |= (1 << 2);
2043                 }
2044
2045                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
2046         }
2047         if (sio_data->beep_pin)
2048                 pr_info("Beeping is supported\n");
2049
2050         /* Disable specific features based on DMI strings */
2051         board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
2052         board_name = dmi_get_system_info(DMI_BOARD_NAME);
2053         if (board_vendor && board_name) {
2054                 if (strcmp(board_vendor, "nVIDIA") == 0
2055                  && strcmp(board_name, "FN68PT") == 0) {
2056                         /*
2057                          * On the Shuttle SN68PT, FAN_CTL2 is apparently not
2058                          * connected to a fan, but to something else. One user
2059                          * has reported instant system power-off when changing
2060                          * the PWM2 duty cycle, so we disable it.
2061                          * I use the board name string as the trigger in case
2062                          * the same board is ever used in other systems.
2063                          */
2064                         pr_info("Disabling pwm2 due to hardware constraints\n");
2065                         sio_data->skip_pwm = (1 << 1);
2066                 }
2067         }
2068
2069 exit:
2070         superio_exit();
2071         return err;
2072 }
2073
2074 static void it87_remove_files(struct device *dev)
2075 {
2076         struct it87_data *data = platform_get_drvdata(pdev);
2077         struct it87_sio_data *sio_data = dev_get_platdata(dev);
2078         int i;
2079
2080         sysfs_remove_group(&dev->kobj, &it87_group);
2081         for (i = 0; i < 10; i++) {
2082                 if (sio_data->skip_in & (1 << i))
2083                         continue;
2084                 sysfs_remove_group(&dev->kobj, &it87_group_in[i]);
2085                 if (it87_attributes_in_beep[i])
2086                         sysfs_remove_file(&dev->kobj,
2087                                           it87_attributes_in_beep[i]);
2088         }
2089         for (i = 0; i < 3; i++) {
2090                 if (!(data->has_temp & (1 << i)))
2091                         continue;
2092                 sysfs_remove_group(&dev->kobj, &it87_group_temp[i]);
2093                 if (has_temp_offset(data))
2094                         sysfs_remove_file(&dev->kobj,
2095                                           it87_attributes_temp_offset[i]);
2096                 if (sio_data->beep_pin)
2097                         sysfs_remove_file(&dev->kobj,
2098                                           it87_attributes_temp_beep[i]);
2099         }
2100         for (i = 0; i < 5; i++) {
2101                 if (!(data->has_fan & (1 << i)))
2102                         continue;
2103                 sysfs_remove_group(&dev->kobj, &it87_group_fan[i]);
2104                 if (sio_data->beep_pin)
2105                         sysfs_remove_file(&dev->kobj,
2106                                           it87_attributes_fan_beep[i]);
2107                 if (i < 3 && !has_16bit_fans(data))
2108                         sysfs_remove_file(&dev->kobj,
2109                                           it87_attributes_fan_div[i]);
2110         }
2111         for (i = 0; i < 3; i++) {
2112                 if (sio_data->skip_pwm & (1 << i))
2113                         continue;
2114                 sysfs_remove_group(&dev->kobj, &it87_group_pwm[i]);
2115                 if (has_old_autopwm(data))
2116                         sysfs_remove_group(&dev->kobj,
2117                                            &it87_group_autopwm[i]);
2118         }
2119         if (!sio_data->skip_vid)
2120                 sysfs_remove_group(&dev->kobj, &it87_group_vid);
2121         sysfs_remove_group(&dev->kobj, &it87_group_label);
2122 }
2123
2124 static int it87_probe(struct platform_device *pdev)
2125 {
2126         struct it87_data *data;
2127         struct resource *res;
2128         struct device *dev = &pdev->dev;
2129         struct it87_sio_data *sio_data = dev_get_platdata(dev);
2130         int err = 0, i;
2131         int enable_pwm_interface;
2132         int fan_beep_need_rw;
2133
2134         res = platform_get_resource(pdev, IORESOURCE_IO, 0);
2135         if (!devm_request_region(&pdev->dev, res->start, IT87_EC_EXTENT,
2136                                  DRVNAME)) {
2137                 dev_err(dev, "Failed to request region 0x%lx-0x%lx\n",
2138                         (unsigned long)res->start,
2139                         (unsigned long)(res->start + IT87_EC_EXTENT - 1));
2140                 return -EBUSY;
2141         }
2142
2143         data = devm_kzalloc(&pdev->dev, sizeof(struct it87_data), GFP_KERNEL);
2144         if (!data)
2145                 return -ENOMEM;
2146
2147         data->addr = res->start;
2148         data->type = sio_data->type;
2149         data->features = it87_devices[sio_data->type].features;
2150         data->peci_mask = it87_devices[sio_data->type].peci_mask;
2151         data->old_peci_mask = it87_devices[sio_data->type].old_peci_mask;
2152         data->name = it87_devices[sio_data->type].name;
2153         /*
2154          * IT8705F Datasheet 0.4.1, 3h == Version G.
2155          * IT8712F Datasheet 0.9.1, section 8.3.5 indicates 8h == Version J.
2156          * These are the first revisions with 16-bit tachometer support.
2157          */
2158         switch (data->type) {
2159         case it87:
2160                 if (sio_data->revision >= 0x03) {
2161                         data->features &= ~FEAT_OLD_AUTOPWM;
2162                         data->features |= FEAT_FAN16_CONFIG | FEAT_16BIT_FANS;
2163                 }
2164                 break;
2165         case it8712:
2166                 if (sio_data->revision >= 0x08) {
2167                         data->features &= ~FEAT_OLD_AUTOPWM;
2168                         data->features |= FEAT_FAN16_CONFIG | FEAT_16BIT_FANS |
2169                                           FEAT_FIVE_FANS;
2170                 }
2171                 break;
2172         default:
2173                 break;
2174         }
2175
2176         /* Now, we do the remaining detection. */
2177         if ((it87_read_value(data, IT87_REG_CONFIG) & 0x80)
2178          || it87_read_value(data, IT87_REG_CHIPID) != 0x90)
2179                 return -ENODEV;
2180
2181         platform_set_drvdata(pdev, data);
2182
2183         mutex_init(&data->update_lock);
2184
2185         /* Check PWM configuration */
2186         enable_pwm_interface = it87_check_pwm(dev);
2187
2188         /* Starting with IT8721F, we handle scaling of internal voltages */
2189         if (has_12mv_adc(data)) {
2190                 if (sio_data->internal & (1 << 0))
2191                         data->in_scaled |= (1 << 3);    /* in3 is AVCC */
2192                 if (sio_data->internal & (1 << 1))
2193                         data->in_scaled |= (1 << 7);    /* in7 is VSB */
2194                 if (sio_data->internal & (1 << 2))
2195                         data->in_scaled |= (1 << 8);    /* in8 is Vbat */
2196                 if (sio_data->internal & (1 << 3))
2197                         data->in_scaled |= (1 << 9);    /* in9 is AVCC */
2198         } else if (sio_data->type == it8781 || sio_data->type == it8782 ||
2199                    sio_data->type == it8783) {
2200                 if (sio_data->internal & (1 << 0))
2201                         data->in_scaled |= (1 << 3);    /* in3 is VCC5V */
2202                 if (sio_data->internal & (1 << 1))
2203                         data->in_scaled |= (1 << 7);    /* in7 is VCCH5V */
2204         }
2205
2206         data->has_temp = 0x07;
2207         if (sio_data->skip_temp & (1 << 2)) {
2208                 if (sio_data->type == it8782
2209                     && !(it87_read_value(data, IT87_REG_TEMP_EXTRA) & 0x80))
2210                         data->has_temp &= ~(1 << 2);
2211         }
2212
2213         /* Initialize the IT87 chip */
2214         it87_init_device(pdev);
2215
2216         /* Register sysfs hooks */
2217         err = sysfs_create_group(&dev->kobj, &it87_group);
2218         if (err)
2219                 return err;
2220
2221         for (i = 0; i < 10; i++) {
2222                 if (sio_data->skip_in & (1 << i))
2223                         continue;
2224                 err = sysfs_create_group(&dev->kobj, &it87_group_in[i]);
2225                 if (err)
2226                         goto error;
2227                 if (sio_data->beep_pin && it87_attributes_in_beep[i]) {
2228                         err = sysfs_create_file(&dev->kobj,
2229                                                 it87_attributes_in_beep[i]);
2230                         if (err)
2231                                 goto error;
2232                 }
2233         }
2234
2235         for (i = 0; i < 3; i++) {
2236                 if (!(data->has_temp & (1 << i)))
2237                         continue;
2238                 err = sysfs_create_group(&dev->kobj, &it87_group_temp[i]);
2239                 if (err)
2240                         goto error;
2241                 if (has_temp_offset(data)) {
2242                         err = sysfs_create_file(&dev->kobj,
2243                                                 it87_attributes_temp_offset[i]);
2244                         if (err)
2245                                 goto error;
2246                 }
2247                 if (sio_data->beep_pin) {
2248                         err = sysfs_create_file(&dev->kobj,
2249                                                 it87_attributes_temp_beep[i]);
2250                         if (err)
2251                                 goto error;
2252                 }
2253         }
2254
2255         /* Do not create fan files for disabled fans */
2256         fan_beep_need_rw = 1;
2257         for (i = 0; i < 5; i++) {
2258                 if (!(data->has_fan & (1 << i)))
2259                         continue;
2260                 err = sysfs_create_group(&dev->kobj, &it87_group_fan[i]);
2261                 if (err)
2262                         goto error;
2263
2264                 if (i < 3 && !has_16bit_fans(data)) {
2265                         err = sysfs_create_file(&dev->kobj,
2266                                                 it87_attributes_fan_div[i]);
2267                         if (err)
2268                                 goto error;
2269                 }
2270
2271                 if (sio_data->beep_pin) {
2272                         err = sysfs_create_file(&dev->kobj,
2273                                                 it87_attributes_fan_beep[i]);
2274                         if (err)
2275                                 goto error;
2276                         if (!fan_beep_need_rw)
2277                                 continue;
2278
2279                         /*
2280                          * As we have a single beep enable bit for all fans,
2281                          * only the first enabled fan has a writable attribute
2282                          * for it.
2283                          */
2284                         if (sysfs_chmod_file(&dev->kobj,
2285                                              it87_attributes_fan_beep[i],
2286                                              S_IRUGO | S_IWUSR))
2287                                 dev_dbg(dev, "chmod +w fan%d_beep failed\n",
2288                                         i + 1);
2289                         fan_beep_need_rw = 0;
2290                 }
2291         }
2292
2293         if (enable_pwm_interface) {
2294                 for (i = 0; i < 3; i++) {
2295                         if (sio_data->skip_pwm & (1 << i))
2296                                 continue;
2297                         err = sysfs_create_group(&dev->kobj,
2298                                                  &it87_group_pwm[i]);
2299                         if (err)
2300                                 goto error;
2301
2302                         if (!has_old_autopwm(data))
2303                                 continue;
2304                         err = sysfs_create_group(&dev->kobj,
2305                                                  &it87_group_autopwm[i]);
2306                         if (err)
2307                                 goto error;
2308                 }
2309         }
2310
2311         if (!sio_data->skip_vid) {
2312                 data->vrm = vid_which_vrm();
2313                 /* VID reading from Super-I/O config space if available */
2314                 data->vid = sio_data->vid_value;
2315                 err = sysfs_create_group(&dev->kobj, &it87_group_vid);
2316                 if (err)
2317                         goto error;
2318         }
2319
2320         /* Export labels for internal sensors */
2321         for (i = 0; i < 4; i++) {
2322                 if (!(sio_data->internal & (1 << i)))
2323                         continue;
2324                 err = sysfs_create_file(&dev->kobj,
2325                                         it87_attributes_label[i]);
2326                 if (err)
2327                         goto error;
2328         }
2329
2330         data->hwmon_dev = hwmon_device_register(dev);
2331         if (IS_ERR(data->hwmon_dev)) {
2332                 err = PTR_ERR(data->hwmon_dev);
2333                 goto error;
2334         }
2335
2336         return 0;
2337
2338 error:
2339         it87_remove_files(dev);
2340         return err;
2341 }
2342
2343 static int it87_remove(struct platform_device *pdev)
2344 {
2345         struct it87_data *data = platform_get_drvdata(pdev);
2346
2347         hwmon_device_unregister(data->hwmon_dev);
2348         it87_remove_files(&pdev->dev);
2349
2350         return 0;
2351 }
2352
2353 /*
2354  * Must be called with data->update_lock held, except during initialization.
2355  * We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
2356  * would slow down the IT87 access and should not be necessary.
2357  */
2358 static int it87_read_value(struct it87_data *data, u8 reg)
2359 {
2360         outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
2361         return inb_p(data->addr + IT87_DATA_REG_OFFSET);
2362 }
2363
2364 /*
2365  * Must be called with data->update_lock held, except during initialization.
2366  * We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
2367  * would slow down the IT87 access and should not be necessary.
2368  */
2369 static void it87_write_value(struct it87_data *data, u8 reg, u8 value)
2370 {
2371         outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
2372         outb_p(value, data->addr + IT87_DATA_REG_OFFSET);
2373 }
2374
2375 /* Return 1 if and only if the PWM interface is safe to use */
2376 static int it87_check_pwm(struct device *dev)
2377 {
2378         struct it87_data *data = dev_get_drvdata(dev);
2379         /*
2380          * Some BIOSes fail to correctly configure the IT87 fans. All fans off
2381          * and polarity set to active low is sign that this is the case so we
2382          * disable pwm control to protect the user.
2383          */
2384         int tmp = it87_read_value(data, IT87_REG_FAN_CTL);
2385         if ((tmp & 0x87) == 0) {
2386                 if (fix_pwm_polarity) {
2387                         /*
2388                          * The user asks us to attempt a chip reconfiguration.
2389                          * This means switching to active high polarity and
2390                          * inverting all fan speed values.
2391                          */
2392                         int i;
2393                         u8 pwm[3];
2394
2395                         for (i = 0; i < 3; i++)
2396                                 pwm[i] = it87_read_value(data,
2397                                                          IT87_REG_PWM(i));
2398
2399                         /*
2400                          * If any fan is in automatic pwm mode, the polarity
2401                          * might be correct, as suspicious as it seems, so we
2402                          * better don't change anything (but still disable the
2403                          * PWM interface).
2404                          */
2405                         if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) {
2406                                 dev_info(dev,
2407                                          "Reconfiguring PWM to active high polarity\n");
2408                                 it87_write_value(data, IT87_REG_FAN_CTL,
2409                                                  tmp | 0x87);
2410                                 for (i = 0; i < 3; i++)
2411                                         it87_write_value(data,
2412                                                          IT87_REG_PWM(i),
2413                                                          0x7f & ~pwm[i]);
2414                                 return 1;
2415                         }
2416
2417                         dev_info(dev,
2418                                  "PWM configuration is too broken to be fixed\n");
2419                 }
2420
2421                 dev_info(dev,
2422                          "Detected broken BIOS defaults, disabling PWM interface\n");
2423                 return 0;
2424         } else if (fix_pwm_polarity) {
2425                 dev_info(dev,
2426                          "PWM configuration looks sane, won't touch\n");
2427         }
2428
2429         return 1;
2430 }
2431
2432 /* Called when we have found a new IT87. */
2433 static void it87_init_device(struct platform_device *pdev)
2434 {
2435         struct it87_sio_data *sio_data = dev_get_platdata(&pdev->dev);
2436         struct it87_data *data = platform_get_drvdata(pdev);
2437         int tmp, i;
2438         u8 mask;
2439
2440         /*
2441          * For each PWM channel:
2442          * - If it is in automatic mode, setting to manual mode should set
2443          *   the fan to full speed by default.
2444          * - If it is in manual mode, we need a mapping to temperature
2445          *   channels to use when later setting to automatic mode later.
2446          *   Use a 1:1 mapping by default (we are clueless.)
2447          * In both cases, the value can (and should) be changed by the user
2448          * prior to switching to a different mode.
2449          * Note that this is no longer needed for the IT8721F and later, as
2450          * these have separate registers for the temperature mapping and the
2451          * manual duty cycle.
2452          */
2453         for (i = 0; i < 3; i++) {
2454                 data->pwm_temp_map[i] = i;
2455                 data->pwm_duty[i] = 0x7f;       /* Full speed */
2456                 data->auto_pwm[i][3] = 0x7f;    /* Full speed, hard-coded */
2457         }
2458
2459         /*
2460          * Some chips seem to have default value 0xff for all limit
2461          * registers. For low voltage limits it makes no sense and triggers
2462          * alarms, so change to 0 instead. For high temperature limits, it
2463          * means -1 degree C, which surprisingly doesn't trigger an alarm,
2464          * but is still confusing, so change to 127 degrees C.
2465          */
2466         for (i = 0; i < 8; i++) {
2467                 tmp = it87_read_value(data, IT87_REG_VIN_MIN(i));
2468                 if (tmp == 0xff)
2469                         it87_write_value(data, IT87_REG_VIN_MIN(i), 0);
2470         }
2471         for (i = 0; i < 3; i++) {
2472                 tmp = it87_read_value(data, IT87_REG_TEMP_HIGH(i));
2473                 if (tmp == 0xff)
2474                         it87_write_value(data, IT87_REG_TEMP_HIGH(i), 127);
2475         }
2476
2477         /*
2478          * Temperature channels are not forcibly enabled, as they can be
2479          * set to two different sensor types and we can't guess which one
2480          * is correct for a given system. These channels can be enabled at
2481          * run-time through the temp{1-3}_type sysfs accessors if needed.
2482          */
2483
2484         /* Check if voltage monitors are reset manually or by some reason */
2485         tmp = it87_read_value(data, IT87_REG_VIN_ENABLE);
2486         if ((tmp & 0xff) == 0) {
2487                 /* Enable all voltage monitors */
2488                 it87_write_value(data, IT87_REG_VIN_ENABLE, 0xff);
2489         }
2490
2491         /* Check if tachometers are reset manually or by some reason */
2492         mask = 0x70 & ~(sio_data->skip_fan << 4);
2493         data->fan_main_ctrl = it87_read_value(data, IT87_REG_FAN_MAIN_CTRL);
2494         if ((data->fan_main_ctrl & mask) == 0) {
2495                 /* Enable all fan tachometers */
2496                 data->fan_main_ctrl |= mask;
2497                 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
2498                                  data->fan_main_ctrl);
2499         }
2500         data->has_fan = (data->fan_main_ctrl >> 4) & 0x07;
2501
2502         /* Set tachometers to 16-bit mode if needed */
2503         if (has_fan16_config(data)) {
2504                 tmp = it87_read_value(data, IT87_REG_FAN_16BIT);
2505                 if (~tmp & 0x07 & data->has_fan) {
2506                         dev_dbg(&pdev->dev,
2507                                 "Setting fan1-3 to 16-bit mode\n");
2508                         it87_write_value(data, IT87_REG_FAN_16BIT,
2509                                          tmp | 0x07);
2510                 }
2511         }
2512
2513         /* Check for additional fans */
2514         if (has_five_fans(data)) {
2515                 tmp = it87_read_value(data, IT87_REG_FAN_16BIT);
2516                 if (tmp & (1 << 4))
2517                         data->has_fan |= (1 << 3); /* fan4 enabled */
2518                 if (tmp & (1 << 5))
2519                         data->has_fan |= (1 << 4); /* fan5 enabled */
2520         }
2521
2522         /* Fan input pins may be used for alternative functions */
2523         data->has_fan &= ~sio_data->skip_fan;
2524
2525         /* Start monitoring */
2526         it87_write_value(data, IT87_REG_CONFIG,
2527                          (it87_read_value(data, IT87_REG_CONFIG) & 0x3e)
2528                          | (update_vbat ? 0x41 : 0x01));
2529 }
2530
2531 static void it87_update_pwm_ctrl(struct it87_data *data, int nr)
2532 {
2533         data->pwm_ctrl[nr] = it87_read_value(data, IT87_REG_PWM(nr));
2534         if (has_newer_autopwm(data)) {
2535                 data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
2536                 data->pwm_duty[nr] = it87_read_value(data,
2537                                                      IT87_REG_PWM_DUTY(nr));
2538         } else {
2539                 if (data->pwm_ctrl[nr] & 0x80)  /* Automatic mode */
2540                         data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
2541                 else                            /* Manual mode */
2542                         data->pwm_duty[nr] = data->pwm_ctrl[nr] & 0x7f;
2543         }
2544
2545         if (has_old_autopwm(data)) {
2546                 int i;
2547
2548                 for (i = 0; i < 5 ; i++)
2549                         data->auto_temp[nr][i] = it87_read_value(data,
2550                                                 IT87_REG_AUTO_TEMP(nr, i));
2551                 for (i = 0; i < 3 ; i++)
2552                         data->auto_pwm[nr][i] = it87_read_value(data,
2553                                                 IT87_REG_AUTO_PWM(nr, i));
2554         }
2555 }
2556
2557 static struct it87_data *it87_update_device(struct device *dev)
2558 {
2559         struct it87_data *data = dev_get_drvdata(dev);
2560         int i;
2561
2562         mutex_lock(&data->update_lock);
2563
2564         if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
2565             || !data->valid) {
2566                 if (update_vbat) {
2567                         /*
2568                          * Cleared after each update, so reenable.  Value
2569                          * returned by this read will be previous value
2570                          */
2571                         it87_write_value(data, IT87_REG_CONFIG,
2572                                 it87_read_value(data, IT87_REG_CONFIG) | 0x40);
2573                 }
2574                 for (i = 0; i <= 7; i++) {
2575                         data->in[i][0] =
2576                                 it87_read_value(data, IT87_REG_VIN(i));
2577                         data->in[i][1] =
2578                                 it87_read_value(data, IT87_REG_VIN_MIN(i));
2579                         data->in[i][2] =
2580                                 it87_read_value(data, IT87_REG_VIN_MAX(i));
2581                 }
2582                 /* in8 (battery) has no limit registers */
2583                 data->in[8][0] = it87_read_value(data, IT87_REG_VIN(8));
2584                 if (data->type == it8603)
2585                         data->in[9][0] = it87_read_value(data, 0x2f);
2586
2587                 for (i = 0; i < 5; i++) {
2588                         /* Skip disabled fans */
2589                         if (!(data->has_fan & (1 << i)))
2590                                 continue;
2591
2592                         data->fan[i][1] =
2593                                 it87_read_value(data, IT87_REG_FAN_MIN[i]);
2594                         data->fan[i][0] = it87_read_value(data,
2595                                        IT87_REG_FAN[i]);
2596                         /* Add high byte if in 16-bit mode */
2597                         if (has_16bit_fans(data)) {
2598                                 data->fan[i][0] |= it87_read_value(data,
2599                                                 IT87_REG_FANX[i]) << 8;
2600                                 data->fan[i][1] |= it87_read_value(data,
2601                                                 IT87_REG_FANX_MIN[i]) << 8;
2602                         }
2603                 }
2604                 for (i = 0; i < 3; i++) {
2605                         if (!(data->has_temp & (1 << i)))
2606                                 continue;
2607                         data->temp[i][0] =
2608                                 it87_read_value(data, IT87_REG_TEMP(i));
2609                         data->temp[i][1] =
2610                                 it87_read_value(data, IT87_REG_TEMP_LOW(i));
2611                         data->temp[i][2] =
2612                                 it87_read_value(data, IT87_REG_TEMP_HIGH(i));
2613                         if (has_temp_offset(data))
2614                                 data->temp[i][3] =
2615                                   it87_read_value(data,
2616                                                   IT87_REG_TEMP_OFFSET[i]);
2617                 }
2618
2619                 /* Newer chips don't have clock dividers */
2620                 if ((data->has_fan & 0x07) && !has_16bit_fans(data)) {
2621                         i = it87_read_value(data, IT87_REG_FAN_DIV);
2622                         data->fan_div[0] = i & 0x07;
2623                         data->fan_div[1] = (i >> 3) & 0x07;
2624                         data->fan_div[2] = (i & 0x40) ? 3 : 1;
2625                 }
2626
2627                 data->alarms =
2628                         it87_read_value(data, IT87_REG_ALARM1) |
2629                         (it87_read_value(data, IT87_REG_ALARM2) << 8) |
2630                         (it87_read_value(data, IT87_REG_ALARM3) << 16);
2631                 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
2632
2633                 data->fan_main_ctrl = it87_read_value(data,
2634                                 IT87_REG_FAN_MAIN_CTRL);
2635                 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL);
2636                 for (i = 0; i < 3; i++)
2637                         it87_update_pwm_ctrl(data, i);
2638
2639                 data->sensor = it87_read_value(data, IT87_REG_TEMP_ENABLE);
2640                 data->extra = it87_read_value(data, IT87_REG_TEMP_EXTRA);
2641                 /*
2642                  * The IT8705F does not have VID capability.
2643                  * The IT8718F and later don't use IT87_REG_VID for the
2644                  * same purpose.
2645                  */
2646                 if (data->type == it8712 || data->type == it8716) {
2647                         data->vid = it87_read_value(data, IT87_REG_VID);
2648                         /*
2649                          * The older IT8712F revisions had only 5 VID pins,
2650                          * but we assume it is always safe to read 6 bits.
2651                          */
2652                         data->vid &= 0x3f;
2653                 }
2654                 data->last_updated = jiffies;
2655                 data->valid = 1;
2656         }
2657
2658         mutex_unlock(&data->update_lock);
2659
2660         return data;
2661 }
2662
2663 static int __init it87_device_add(unsigned short address,
2664                                   const struct it87_sio_data *sio_data)
2665 {
2666         struct resource res = {
2667                 .start  = address + IT87_EC_OFFSET,
2668                 .end    = address + IT87_EC_OFFSET + IT87_EC_EXTENT - 1,
2669                 .name   = DRVNAME,
2670                 .flags  = IORESOURCE_IO,
2671         };
2672         int err;
2673
2674         err = acpi_check_resource_conflict(&res);
2675         if (err)
2676                 goto exit;
2677
2678         pdev = platform_device_alloc(DRVNAME, address);
2679         if (!pdev) {
2680                 err = -ENOMEM;
2681                 pr_err("Device allocation failed\n");
2682                 goto exit;
2683         }
2684
2685         err = platform_device_add_resources(pdev, &res, 1);
2686         if (err) {
2687                 pr_err("Device resource addition failed (%d)\n", err);
2688                 goto exit_device_put;
2689         }
2690
2691         err = platform_device_add_data(pdev, sio_data,
2692                                        sizeof(struct it87_sio_data));
2693         if (err) {
2694                 pr_err("Platform data allocation failed\n");
2695                 goto exit_device_put;
2696         }
2697
2698         err = platform_device_add(pdev);
2699         if (err) {
2700                 pr_err("Device addition failed (%d)\n", err);
2701                 goto exit_device_put;
2702         }
2703
2704         return 0;
2705
2706 exit_device_put:
2707         platform_device_put(pdev);
2708 exit:
2709         return err;
2710 }
2711
2712 static int __init sm_it87_init(void)
2713 {
2714         int err;
2715         unsigned short isa_address = 0;
2716         struct it87_sio_data sio_data;
2717
2718         memset(&sio_data, 0, sizeof(struct it87_sio_data));
2719         err = it87_find(&isa_address, &sio_data);
2720         if (err)
2721                 return err;
2722         err = platform_driver_register(&it87_driver);
2723         if (err)
2724                 return err;
2725
2726         err = it87_device_add(isa_address, &sio_data);
2727         if (err) {
2728                 platform_driver_unregister(&it87_driver);
2729                 return err;
2730         }
2731
2732         return 0;
2733 }
2734
2735 static void __exit sm_it87_exit(void)
2736 {
2737         platform_device_unregister(pdev);
2738         platform_driver_unregister(&it87_driver);
2739 }
2740
2741
2742 MODULE_AUTHOR("Chris Gauthron, Jean Delvare <jdelvare@suse.de>");
2743 MODULE_DESCRIPTION("IT8705F/IT871xF/IT872xF hardware monitoring driver");
2744 module_param(update_vbat, bool, 0);
2745 MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value");
2746 module_param(fix_pwm_polarity, bool, 0);
2747 MODULE_PARM_DESC(fix_pwm_polarity,
2748                  "Force PWM polarity to active high (DANGEROUS)");
2749 MODULE_LICENSE("GPL");
2750
2751 module_init(sm_it87_init);
2752 module_exit(sm_it87_exit);