git.sur5r.net Git - groeck-it87/blob - 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  *            Sis950   A clone of the IT8705F
  30  *
  31  *  Copyright (C) 2001 Chris Gauthron
  32  *  Copyright (C) 2005-2010 Jean Delvare <jdelvare@suse.de>
  33  *
  34  *  This program is free software; you can redistribute it and/or modify
  35  *  it under the terms of the GNU General Public License as published by
  36  *  the Free Software Foundation; either version 2 of the License, or
  37  *  (at your option) any later version.
  38  *
  39  *  This program is distributed in the hope that it will be useful,
  40  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  41  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  42  *  GNU General Public License for more details.
  43  *
  44  *  You should have received a copy of the GNU General Public License
  45  *  along with this program; if not, write to the Free Software
  46  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  47  */
  48
  49 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  50
  51 #include <linux/module.h>
  52 #include <linux/init.h>
  53 #include <linux/slab.h>
  54 #include <linux/jiffies.h>
  55 #include <linux/platform_device.h>
  56 #include <linux/hwmon.h>
  57 #include <linux/hwmon-sysfs.h>
  58 #include <linux/hwmon-vid.h>
  59 #include <linux/err.h>
  60 #include <linux/mutex.h>
  61 #include <linux/sysfs.h>
  62 #include <linux/string.h>
  63 #include <linux/dmi.h>
  64 #include <linux/acpi.h>
  65 #include <linux/io.h>
  66 #include "compat.h"
  67
  68 #define DRVNAME "it87"
  69
  70 enum chips { it87, it8712, it8716, it8718, it8720, it8721, it8728, it8771,
  71              it8772, it8781, it8782, it8783, 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 IT8603E_DEVID 0x8603
 155 #define IT8623E_DEVID 0x8623
 156 #define IT87_ACT_REG  0x30
 157 #define IT87_BASE_REG 0x60
 158
 159 /* Logical device 7 registers (IT8712F and later) */
 160 #define IT87_SIO_GPIO1_REG      0x25
 161 #define IT87_SIO_GPIO3_REG      0x27
 162 #define IT87_SIO_GPIO5_REG      0x29
 163 #define IT87_SIO_PINX1_REG      0x2a    /* Pin selection */
 164 #define IT87_SIO_PINX2_REG      0x2c    /* Pin selection */
 165 #define IT87_SIO_SPI_REG        0xef    /* SPI function pin select */
 166 #define IT87_SIO_VID_REG        0xfc    /* VID value */
 167 #define IT87_SIO_BEEP_PIN_REG   0xf6    /* Beep pin mapping */
 168
 169 /* Update battery voltage after every reading if true */
 170 static bool update_vbat;
 171
 172 /* Not all BIOSes properly configure the PWM registers */
 173 static bool fix_pwm_polarity;
 174
 175 /* Many IT87 constants specified below */
 176
 177 /* Length of ISA address segment */
 178 #define IT87_EXTENT 8
 179
 180 /* Length of ISA address segment for Environmental Controller */
 181 #define IT87_EC_EXTENT 2
 182
 183 /* Offset of EC registers from ISA base address */
 184 #define IT87_EC_OFFSET 5
 185
 186 /* Where are the ISA address/data registers relative to the EC base address */
 187 #define IT87_ADDR_REG_OFFSET 0
 188 #define IT87_DATA_REG_OFFSET 1
 189
 190 /*----- The IT87 registers -----*/
 191
 192 #define IT87_REG_CONFIG        0x00
 193
 194 #define IT87_REG_ALARM1        0x01
 195 #define IT87_REG_ALARM2        0x02
 196 #define IT87_REG_ALARM3        0x03
 197
 198 /*
 199  * The IT8718F and IT8720F have the VID value in a different register, in
 200  * Super-I/O configuration space.
 201  */
 202 #define IT87_REG_VID           0x0a
 203 /*
 204  * The IT8705F and IT8712F earlier than revision 0x08 use register 0x0b
 205  * for fan divisors. Later IT8712F revisions must use 16-bit tachometer
 206  * mode.
 207  */
 208 #define IT87_REG_FAN_DIV       0x0b
 209 #define IT87_REG_FAN_16BIT     0x0c
 210
 211 /* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */
 212
 213 static const u8 IT87_REG_FAN[]          = { 0x0d, 0x0e, 0x0f, 0x80, 0x82 };
 214 static const u8 IT87_REG_FAN_MIN[]      = { 0x10, 0x11, 0x12, 0x84, 0x86 };
 215 static const u8 IT87_REG_FANX[]         = { 0x18, 0x19, 0x1a, 0x81, 0x83 };
 216 static const u8 IT87_REG_FANX_MIN[]     = { 0x1b, 0x1c, 0x1d, 0x85, 0x87 };
 217 static const u8 IT87_REG_TEMP_OFFSET[]  = { 0x56, 0x57, 0x59 };
 218
 219 #define IT87_REG_FAN_MAIN_CTRL 0x13
 220 #define IT87_REG_FAN_CTL       0x14
 221 #define IT87_REG_PWM(nr)       (0x15 + (nr))
 222 #define IT87_REG_PWM_DUTY(nr)  (0x63 + (nr) * 8)
 223
 224 #define IT87_REG_VIN(nr)       (0x20 + (nr))
 225 #define IT87_REG_TEMP(nr)      (0x29 + (nr))
 226
 227 #define IT87_REG_VIN_MAX(nr)   (0x30 + (nr) * 2)
 228 #define IT87_REG_VIN_MIN(nr)   (0x31 + (nr) * 2)
 229 #define IT87_REG_TEMP_HIGH(nr) (0x40 + (nr) * 2)
 230 #define IT87_REG_TEMP_LOW(nr)  (0x41 + (nr) * 2)
 231
 232 #define IT87_REG_VIN_ENABLE    0x50
 233 #define IT87_REG_TEMP_ENABLE   0x51
 234 #define IT87_REG_TEMP_EXTRA    0x55
 235 #define IT87_REG_BEEP_ENABLE   0x5c
 236
 237 #define IT87_REG_CHIPID        0x58
 238
 239 #define IT87_REG_AUTO_TEMP(nr, i) (0x60 + (nr) * 8 + (i))
 240 #define IT87_REG_AUTO_PWM(nr, i)  (0x65 + (nr) * 8 + (i))
 241
 242 struct it87_devices {
 243         const char *name;
 244         u16 features;
 245         u8 peci_mask;
 246         u8 old_peci_mask;
 247 };
 248
 249 #define FEAT_12MV_ADC           (1 << 0)
 250 #define FEAT_NEWER_AUTOPWM      (1 << 1)
 251 #define FEAT_OLD_AUTOPWM        (1 << 2)
 252 #define FEAT_16BIT_FANS         (1 << 3)
 253 #define FEAT_TEMP_OFFSET        (1 << 4)
 254 #define FEAT_TEMP_PECI          (1 << 5)
 255 #define FEAT_TEMP_OLD_PECI      (1 << 6)
 256 #define FEAT_FAN16_CONFIG       (1 << 7)        /* Need to enable 16-bit fans */
 257 #define FEAT_FIVE_FANS          (1 << 8)        /* Supports five fans */
 258 #define FEAT_VID                (1 << 9)        /* Set if chip supports VID */
 259
 260 static const struct it87_devices it87_devices[] = {
 261         [it87] = {
 262                 .name = "it87",
 263                 .features = FEAT_OLD_AUTOPWM | FEAT_FAN16_CONFIG,
 264                                                 /* may need to overwrite */
 265         },
 266         [it8712] = {
 267                 .name = "it8712",
 268                 .features = FEAT_OLD_AUTOPWM | FEAT_FAN16_CONFIG | FEAT_VID,
 269                                                 /* may need to overwrite */
 270         },
 271         [it8716] = {
 272                 .name = "it8716",
 273                 .features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET | FEAT_VID
 274                   | FEAT_FAN16_CONFIG | FEAT_FIVE_FANS,
 275         },
 276         [it8718] = {
 277                 .name = "it8718",
 278                 .features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET | FEAT_VID
 279                   | FEAT_TEMP_OLD_PECI | FEAT_FAN16_CONFIG | FEAT_FIVE_FANS,
 280                 .old_peci_mask = 0x4,
 281         },
 282         [it8720] = {
 283                 .name = "it8720",
 284                 .features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET | FEAT_VID
 285                   | FEAT_TEMP_OLD_PECI | FEAT_FAN16_CONFIG | FEAT_FIVE_FANS,
 286                 .old_peci_mask = 0x4,
 287         },
 288         [it8721] = {
 289                 .name = "it8721",
 290                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
 291                   | FEAT_TEMP_OFFSET | FEAT_TEMP_OLD_PECI | FEAT_TEMP_PECI
 292                   | FEAT_FAN16_CONFIG | FEAT_FIVE_FANS,
 293                 .peci_mask = 0x05,
 294                 .old_peci_mask = 0x02,  /* Actually reports PCH */
 295         },
 296         [it8728] = {
 297                 .name = "it8728",
 298                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
 299                   | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI | FEAT_FIVE_FANS,
 300                 .peci_mask = 0x07,
 301         },
 302         [it8771] = {
 303                 .name = "it8771",
 304                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
 305                   | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI,
 306                                 /* PECI: guesswork */
 307                                 /* 12mV ADC (OHM) */
 308                                 /* 16 bit fans (OHM) */
 309                                 /* three fans, always 16 bit (guesswork) */
 310                 .peci_mask = 0x07,
 311         },
 312         [it8772] = {
 313                 .name = "it8772",
 314                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
 315                   | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI,
 316                                 /* PECI (coreboot) */
 317                                 /* 12mV ADC (HWSensors4, OHM) */
 318                                 /* 16 bit fans (HWSensors4, OHM) */
 319                                 /* three fans, always 16 bit (datasheet) */
 320                 .peci_mask = 0x07,
 321         },
 322         [it8781] = {
 323                 .name = "it8781",
 324                 .features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET
 325                   | FEAT_TEMP_OLD_PECI | FEAT_FAN16_CONFIG,
 326                 .old_peci_mask = 0x4,
 327         },
 328         [it8782] = {
 329                 .name = "it8782",
 330                 .features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET
 331                   | FEAT_TEMP_OLD_PECI | FEAT_FAN16_CONFIG,
 332                 .old_peci_mask = 0x4,
 333         },
 334         [it8783] = {
 335                 .name = "it8783",
 336                 .features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET
 337                   | FEAT_TEMP_OLD_PECI | FEAT_FAN16_CONFIG,
 338                 .old_peci_mask = 0x4,
 339         },
 340         [it8603] = {
 341                 .name = "it8603",
 342                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
 343                   | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI,
 344                 .peci_mask = 0x07,
 345         },
 346 };
 347
 348 #define has_16bit_fans(data)    ((data)->features & FEAT_16BIT_FANS)
 349 #define has_12mv_adc(data)      ((data)->features & FEAT_12MV_ADC)
 350 #define has_newer_autopwm(data) ((data)->features & FEAT_NEWER_AUTOPWM)
 351 #define has_old_autopwm(data)   ((data)->features & FEAT_OLD_AUTOPWM)
 352 #define has_temp_offset(data)   ((data)->features & FEAT_TEMP_OFFSET)
 353 #define has_temp_peci(data, nr) (((data)->features & FEAT_TEMP_PECI) && \
 354                                  ((data)->peci_mask & (1 << nr)))
 355 #define has_temp_old_peci(data, nr) \
 356                                 (((data)->features & FEAT_TEMP_OLD_PECI) && \
 357                                  ((data)->old_peci_mask & (1 << nr)))
 358 #define has_fan16_config(data)  (has_16bit_fans(data) && \
 359                                  ((data)->features & FEAT_FAN16_CONFIG))
 360 #define has_five_fans(data)     ((data)->features & FEAT_FIVE_FANS)
 361 #define has_vid(data)           ((data)->features & FEAT_VID)
 362
 363 struct it87_sio_data {
 364         enum chips type;
 365         /* Values read from Super-I/O config space */
 366         u8 revision;
 367         u8 vid_value;
 368         u8 beep_pin;
 369         u8 internal;    /* Internal sensors can be labeled */
 370         /* Features skipped based on config or DMI */
 371         u16 skip_in;
 372         u8 skip_vid;
 373         u8 skip_fan;
 374         u8 skip_pwm;
 375         u8 skip_temp;
 376 };
 377
 378 /*
 379  * For each registered chip, we need to keep some data in memory.
 380  * The structure is dynamically allocated.
 381  */
 382 struct it87_data {
 383         struct device *hwmon_dev;
 384         enum chips type;
 385         u16 features;
 386         u8 peci_mask;
 387         u8 old_peci_mask;
 388
 389         unsigned short addr;
 390         const char *name;
 391         struct mutex update_lock;
 392         char valid;             /* !=0 if following fields are valid */
 393         unsigned long last_updated;     /* In jiffies */
 394
 395         u16 in_scaled;          /* Internal voltage sensors are scaled */
 396         u8 in[10][3];           /* [nr][0]=in, [1]=min, [2]=max */
 397         u8 has_fan;             /* Bitfield, fans enabled */
 398         u16 fan[5][2];          /* Register values, [nr][0]=fan, [1]=min */
 399         u8 has_temp;            /* Bitfield, temp sensors enabled */
 400         s8 temp[3][4];          /* [nr][0]=temp, [1]=min, [2]=max, [3]=offset */
 401         u8 sensor;              /* Register value (IT87_REG_TEMP_ENABLE) */
 402         u8 extra;               /* Register value (IT87_REG_TEMP_EXTRA) */
 403         u8 fan_div[3];          /* Register encoding, shifted right */
 404         u8 vid;                 /* Register encoding, combined */
 405         u8 vrm;
 406         u32 alarms;             /* Register encoding, combined */
 407         u8 beeps;               /* Register encoding */
 408         u8 fan_main_ctrl;       /* Register value */
 409         u8 fan_ctl;             /* Register value */
 410
 411         /*
 412          * The following 3 arrays correspond to the same registers up to
 413          * the IT8720F. The meaning of bits 6-0 depends on the value of bit
 414          * 7, and we want to preserve settings on mode changes, so we have
 415          * to track all values separately.
 416          * Starting with the IT8721F, the manual PWM duty cycles are stored
 417          * in separate registers (8-bit values), so the separate tracking
 418          * is no longer needed, but it is still done to keep the driver
 419          * simple.
 420          */
 421         u8 pwm_ctrl[3];         /* Register value */
 422         u8 pwm_duty[3];         /* Manual PWM value set by user */
 423         u8 pwm_temp_map[3];     /* PWM to temp. chan. mapping (bits 1-0) */
 424
 425         /* Automatic fan speed control registers */
 426         u8 auto_pwm[3][4];      /* [nr][3] is hard-coded */
 427         s8 auto_temp[3][5];     /* [nr][0] is point1_temp_hyst */
 428 };
 429
 430 static int adc_lsb(const struct it87_data *data, int nr)
 431 {
 432         int lsb = has_12mv_adc(data) ? 12 : 16;
 433         if (data->in_scaled & (1 << nr))
 434                 lsb <<= 1;
 435         return lsb;
 436 }
 437
 438 static u8 in_to_reg(const struct it87_data *data, int nr, long val)
 439 {
 440         val = DIV_ROUND_CLOSEST(val, adc_lsb(data, nr));
 441         return clamp_val(val, 0, 255);
 442 }
 443
 444 static int in_from_reg(const struct it87_data *data, int nr, int val)
 445 {
 446         return val * adc_lsb(data, nr);
 447 }
 448
 449 static inline u8 FAN_TO_REG(long rpm, int div)
 450 {
 451         if (rpm == 0)
 452                 return 255;
 453         rpm = clamp_val(rpm, 1, 1000000);
 454         return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
 455 }
 456
 457 static inline u16 FAN16_TO_REG(long rpm)
 458 {
 459         if (rpm == 0)
 460                 return 0xffff;
 461         return clamp_val((1350000 + rpm) / (rpm * 2), 1, 0xfffe);
 462 }
 463
 464 #define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : (val) == 255 ? 0 : \
 465                                 1350000 / ((val) * (div)))
 466 /* The divider is fixed to 2 in 16-bit mode */
 467 #define FAN16_FROM_REG(val) ((val) == 0 ? -1 : (val) == 0xffff ? 0 : \
 468                              1350000 / ((val) * 2))
 469
 470 #define TEMP_TO_REG(val) (clamp_val(((val) < 0 ? (((val) - 500) / 1000) : \
 471                                     ((val) + 500) / 1000), -128, 127))
 472 #define TEMP_FROM_REG(val) ((val) * 1000)
 473
 474 static u8 pwm_to_reg(const struct it87_data *data, long val)
 475 {
 476         if (has_newer_autopwm(data))
 477                 return val;
 478         else
 479                 return val >> 1;
 480 }
 481
 482 static int pwm_from_reg(const struct it87_data *data, u8 reg)
 483 {
 484         if (has_newer_autopwm(data))
 485                 return reg;
 486         else
 487                 return (reg & 0x7f) << 1;
 488 }
 489
 490
 491 static int DIV_TO_REG(int val)
 492 {
 493         int answer = 0;
 494         while (answer < 7 && (val >>= 1))
 495                 answer++;
 496         return answer;
 497 }
 498 #define DIV_FROM_REG(val) (1 << (val))
 499
 500 static const unsigned int pwm_freq[8] = {
 501         48000000 / 128,
 502         24000000 / 128,
 503         12000000 / 128,
 504         8000000 / 128,
 505         6000000 / 128,
 506         3000000 / 128,
 507         1500000 / 128,
 508         750000 / 128,
 509 };
 510
 511 static int it87_probe(struct platform_device *pdev);
 512 static int it87_remove(struct platform_device *pdev);
 513
 514 static int it87_read_value(struct it87_data *data, u8 reg);
 515 static void it87_write_value(struct it87_data *data, u8 reg, u8 value);
 516 static struct it87_data *it87_update_device(struct device *dev);
 517 static int it87_check_pwm(struct device *dev);
 518 static void it87_init_device(struct platform_device *pdev);
 519
 520
 521 static struct platform_driver it87_driver = {
 522         .driver = {
 523                 .name   = DRVNAME,
 524         },
 525         .probe  = it87_probe,
 526         .remove = it87_remove,
 527 };
 528
 529 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
 530                        char *buf)
 531 {
 532         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 533         int nr = sattr->nr;
 534         int index = sattr->index;
 535
 536         struct it87_data *data = it87_update_device(dev);
 537         return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in[nr][index]));
 538 }
 539
 540 static ssize_t set_in(struct device *dev, struct device_attribute *attr,
 541                       const char *buf, size_t count)
 542 {
 543         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 544         int nr = sattr->nr;
 545         int index = sattr->index;
 546
 547         struct it87_data *data = dev_get_drvdata(dev);
 548         unsigned long val;
 549
 550         if (kstrtoul(buf, 10, &val) < 0)
 551                 return -EINVAL;
 552
 553         mutex_lock(&data->update_lock);
 554         data->in[nr][index] = in_to_reg(data, nr, val);
 555         it87_write_value(data,
 556                          index == 1 ? IT87_REG_VIN_MIN(nr)
 557                                     : IT87_REG_VIN_MAX(nr),
 558                          data->in[nr][index]);
 559         mutex_unlock(&data->update_lock);
 560         return count;
 561 }
 562
 563 static SENSOR_DEVICE_ATTR_2(in0_input, S_IRUGO, show_in, NULL, 0, 0);
 564 static SENSOR_DEVICE_ATTR_2(in0_min, S_IRUGO | S_IWUSR, show_in, set_in,
 565                             0, 1);
 566 static SENSOR_DEVICE_ATTR_2(in0_max, S_IRUGO | S_IWUSR, show_in, set_in,
 567                             0, 2);
 568
 569 static SENSOR_DEVICE_ATTR_2(in1_input, S_IRUGO, show_in, NULL, 1, 0);
 570 static SENSOR_DEVICE_ATTR_2(in1_min, S_IRUGO | S_IWUSR, show_in, set_in,
 571                             1, 1);
 572 static SENSOR_DEVICE_ATTR_2(in1_max, S_IRUGO | S_IWUSR, show_in, set_in,
 573                             1, 2);
 574
 575 static SENSOR_DEVICE_ATTR_2(in2_input, S_IRUGO, show_in, NULL, 2, 0);
 576 static SENSOR_DEVICE_ATTR_2(in2_min, S_IRUGO | S_IWUSR, show_in, set_in,
 577                             2, 1);
 578 static SENSOR_DEVICE_ATTR_2(in2_max, S_IRUGO | S_IWUSR, show_in, set_in,
 579                             2, 2);
 580
 581 static SENSOR_DEVICE_ATTR_2(in3_input, S_IRUGO, show_in, NULL, 3, 0);
 582 static SENSOR_DEVICE_ATTR_2(in3_min, S_IRUGO | S_IWUSR, show_in, set_in,
 583                             3, 1);
 584 static SENSOR_DEVICE_ATTR_2(in3_max, S_IRUGO | S_IWUSR, show_in, set_in,
 585                             3, 2);
 586
 587 static SENSOR_DEVICE_ATTR_2(in4_input, S_IRUGO, show_in, NULL, 4, 0);
 588 static SENSOR_DEVICE_ATTR_2(in4_min, S_IRUGO | S_IWUSR, show_in, set_in,
 589                             4, 1);
 590 static SENSOR_DEVICE_ATTR_2(in4_max, S_IRUGO | S_IWUSR, show_in, set_in,
 591                             4, 2);
 592
 593 static SENSOR_DEVICE_ATTR_2(in5_input, S_IRUGO, show_in, NULL, 5, 0);
 594 static SENSOR_DEVICE_ATTR_2(in5_min, S_IRUGO | S_IWUSR, show_in, set_in,
 595                             5, 1);
 596 static SENSOR_DEVICE_ATTR_2(in5_max, S_IRUGO | S_IWUSR, show_in, set_in,
 597                             5, 2);
 598
 599 static SENSOR_DEVICE_ATTR_2(in6_input, S_IRUGO, show_in, NULL, 6, 0);
 600 static SENSOR_DEVICE_ATTR_2(in6_min, S_IRUGO | S_IWUSR, show_in, set_in,
 601                             6, 1);
 602 static SENSOR_DEVICE_ATTR_2(in6_max, S_IRUGO | S_IWUSR, show_in, set_in,
 603                             6, 2);
 604
 605 static SENSOR_DEVICE_ATTR_2(in7_input, S_IRUGO, show_in, NULL, 7, 0);
 606 static SENSOR_DEVICE_ATTR_2(in7_min, S_IRUGO | S_IWUSR, show_in, set_in,
 607                             7, 1);
 608 static SENSOR_DEVICE_ATTR_2(in7_max, S_IRUGO | S_IWUSR, show_in, set_in,
 609                             7, 2);
 610
 611 static SENSOR_DEVICE_ATTR_2(in8_input, S_IRUGO, show_in, NULL, 8, 0);
 612 static SENSOR_DEVICE_ATTR_2(in9_input, S_IRUGO, show_in, NULL, 9, 0);
 613
 614 /* 3 temperatures */
 615 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
 616                          char *buf)
 617 {
 618         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 619         int nr = sattr->nr;
 620         int index = sattr->index;
 621         struct it87_data *data = it87_update_device(dev);
 622
 623         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr][index]));
 624 }
 625
 626 static ssize_t set_temp(struct device *dev, struct device_attribute *attr,
 627                         const char *buf, size_t count)
 628 {
 629         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 630         int nr = sattr->nr;
 631         int index = sattr->index;
 632         struct it87_data *data = dev_get_drvdata(dev);
 633         long val;
 634         u8 reg, regval;
 635
 636         if (kstrtol(buf, 10, &val) < 0)
 637                 return -EINVAL;
 638
 639         mutex_lock(&data->update_lock);
 640
 641         switch (index) {
 642         default:
 643         case 1:
 644                 reg = IT87_REG_TEMP_LOW(nr);
 645                 break;
 646         case 2:
 647                 reg = IT87_REG_TEMP_HIGH(nr);
 648                 break;
 649         case 3:
 650                 regval = it87_read_value(data, IT87_REG_BEEP_ENABLE);
 651                 if (!(regval & 0x80)) {
 652                         regval |= 0x80;
 653                         it87_write_value(data, IT87_REG_BEEP_ENABLE, regval);
 654                 }
 655                 data->valid = 0;
 656                 reg = IT87_REG_TEMP_OFFSET[nr];
 657                 break;
 658         }
 659
 660         data->temp[nr][index] = TEMP_TO_REG(val);
 661         it87_write_value(data, reg, data->temp[nr][index]);
 662         mutex_unlock(&data->update_lock);
 663         return count;
 664 }
 665
 666 static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 0);
 667 static SENSOR_DEVICE_ATTR_2(temp1_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
 668                             0, 1);
 669 static SENSOR_DEVICE_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
 670                             0, 2);
 671 static SENSOR_DEVICE_ATTR_2(temp1_offset, S_IRUGO | S_IWUSR, show_temp,
 672                             set_temp, 0, 3);
 673 static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 1, 0);
 674 static SENSOR_DEVICE_ATTR_2(temp2_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
 675                             1, 1);
 676 static SENSOR_DEVICE_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
 677                             1, 2);
 678 static SENSOR_DEVICE_ATTR_2(temp2_offset, S_IRUGO | S_IWUSR, show_temp,
 679                             set_temp, 1, 3);
 680 static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp, NULL, 2, 0);
 681 static SENSOR_DEVICE_ATTR_2(temp3_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
 682                             2, 1);
 683 static SENSOR_DEVICE_ATTR_2(temp3_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
 684                             2, 2);
 685 static SENSOR_DEVICE_ATTR_2(temp3_offset, S_IRUGO | S_IWUSR, show_temp,
 686                             set_temp, 2, 3);
 687
 688 static ssize_t show_temp_type(struct device *dev, struct device_attribute *attr,
 689                               char *buf)
 690 {
 691         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 692         int nr = sensor_attr->index;
 693         struct it87_data *data = it87_update_device(dev);
 694         u8 reg = data->sensor;      /* In case value is updated while used */
 695         u8 extra = data->extra;
 696
 697         if ((has_temp_peci(data, nr) && (reg >> 6 == nr + 1))
 698             || (has_temp_old_peci(data, nr) && (extra & 0x80)))
 699                 return sprintf(buf, "6\n");  /* Intel PECI */
 700         if (reg & (1 << nr))
 701                 return sprintf(buf, "3\n");  /* thermal diode */
 702         if (reg & (8 << nr))
 703                 return sprintf(buf, "4\n");  /* thermistor */
 704         return sprintf(buf, "0\n");      /* disabled */
 705 }
 706
 707 static ssize_t set_temp_type(struct device *dev, struct device_attribute *attr,
 708                              const char *buf, size_t count)
 709 {
 710         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 711         int nr = sensor_attr->index;
 712
 713         struct it87_data *data = dev_get_drvdata(dev);
 714         long val;
 715         u8 reg, extra;
 716
 717         if (kstrtol(buf, 10, &val) < 0)
 718                 return -EINVAL;
 719
 720         reg = it87_read_value(data, IT87_REG_TEMP_ENABLE);
 721         reg &= ~(1 << nr);
 722         reg &= ~(8 << nr);
 723         if (has_temp_peci(data, nr) && (reg >> 6 == nr + 1 || val == 6))
 724                 reg &= 0x3f;
 725         extra = it87_read_value(data, IT87_REG_TEMP_EXTRA);
 726         if (has_temp_old_peci(data, nr) && ((extra & 0x80) || val == 6))
 727                 extra &= 0x7f;
 728         if (val == 2) { /* backwards compatibility */
 729                 dev_warn(dev,
 730                          "Sensor type 2 is deprecated, please use 4 instead\n");
 731                 val = 4;
 732         }
 733         /* 3 = thermal diode; 4 = thermistor; 6 = Intel PECI; 0 = disabled */
 734         if (val == 3)
 735                 reg |= 1 << nr;
 736         else if (val == 4)
 737                 reg |= 8 << nr;
 738         else if (has_temp_peci(data, nr) && val == 6)
 739                 reg |= (nr + 1) << 6;
 740         else if (has_temp_old_peci(data, nr) && val == 6)
 741                 extra |= 0x80;
 742         else if (val != 0)
 743                 return -EINVAL;
 744
 745         mutex_lock(&data->update_lock);
 746         data->sensor = reg;
 747         data->extra = extra;
 748         it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor);
 749         if (has_temp_old_peci(data, nr))
 750                 it87_write_value(data, IT87_REG_TEMP_EXTRA, data->extra);
 751         data->valid = 0;        /* Force cache refresh */
 752         mutex_unlock(&data->update_lock);
 753         return count;
 754 }
 755
 756 static SENSOR_DEVICE_ATTR(temp1_type, S_IRUGO | S_IWUSR, show_temp_type,
 757                           set_temp_type, 0);
 758 static SENSOR_DEVICE_ATTR(temp2_type, S_IRUGO | S_IWUSR, show_temp_type,
 759                           set_temp_type, 1);
 760 static SENSOR_DEVICE_ATTR(temp3_type, S_IRUGO | S_IWUSR, show_temp_type,
 761                           set_temp_type, 2);
 762
 763 /* 3 Fans */
 764
 765 static int pwm_mode(const struct it87_data *data, int nr)
 766 {
 767         int ctrl = data->fan_main_ctrl & (1 << nr);
 768
 769         if (ctrl == 0 && data->type != it8603)          /* Full speed */
 770                 return 0;
 771         if (data->pwm_ctrl[nr] & 0x80)                  /* Automatic mode */
 772                 return 2;
 773         else                                            /* Manual mode */
 774                 return 1;
 775 }
 776
 777 static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
 778                         char *buf)
 779 {
 780         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 781         int nr = sattr->nr;
 782         int index = sattr->index;
 783         int speed;
 784         struct it87_data *data = it87_update_device(dev);
 785
 786         speed = has_16bit_fans(data) ?
 787                 FAN16_FROM_REG(data->fan[nr][index]) :
 788                 FAN_FROM_REG(data->fan[nr][index],
 789                              DIV_FROM_REG(data->fan_div[nr]));
 790         return sprintf(buf, "%d\n", speed);
 791 }
 792
 793 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
 794                 char *buf)
 795 {
 796         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 797         int nr = sensor_attr->index;
 798
 799         struct it87_data *data = it87_update_device(dev);
 800         return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
 801 }
 802 static ssize_t show_pwm_enable(struct device *dev,
 803                 struct device_attribute *attr, char *buf)
 804 {
 805         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 806         int nr = sensor_attr->index;
 807
 808         struct it87_data *data = it87_update_device(dev);
 809         return sprintf(buf, "%d\n", pwm_mode(data, nr));
 810 }
 811 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
 812                 char *buf)
 813 {
 814         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 815         int nr = sensor_attr->index;
 816
 817         struct it87_data *data = it87_update_device(dev);
 818         return sprintf(buf, "%d\n",
 819                        pwm_from_reg(data, data->pwm_duty[nr]));
 820 }
 821 static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr,
 822                 char *buf)
 823 {
 824         struct it87_data *data = it87_update_device(dev);
 825         int index = (data->fan_ctl >> 4) & 0x07;
 826
 827         return sprintf(buf, "%u\n", pwm_freq[index]);
 828 }
 829
 830 static ssize_t set_fan(struct device *dev, struct device_attribute *attr,
 831                        const char *buf, size_t count)
 832 {
 833         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 834         int nr = sattr->nr;
 835         int index = sattr->index;
 836
 837         struct it87_data *data = dev_get_drvdata(dev);
 838         long val;
 839         u8 reg;
 840
 841         if (kstrtol(buf, 10, &val) < 0)
 842                 return -EINVAL;
 843
 844         mutex_lock(&data->update_lock);
 845
 846         if (has_16bit_fans(data)) {
 847                 data->fan[nr][index] = FAN16_TO_REG(val);
 848                 it87_write_value(data, IT87_REG_FAN_MIN[nr],
 849                                  data->fan[nr][index] & 0xff);
 850                 it87_write_value(data, IT87_REG_FANX_MIN[nr],
 851                                  data->fan[nr][index] >> 8);
 852         } else {
 853                 reg = it87_read_value(data, IT87_REG_FAN_DIV);
 854                 switch (nr) {
 855                 case 0:
 856                         data->fan_div[nr] = reg & 0x07;
 857                         break;
 858                 case 1:
 859                         data->fan_div[nr] = (reg >> 3) & 0x07;
 860                         break;
 861                 case 2:
 862                         data->fan_div[nr] = (reg & 0x40) ? 3 : 1;
 863                         break;
 864                 }
 865                 data->fan[nr][index] =
 866                   FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
 867                 it87_write_value(data, IT87_REG_FAN_MIN[nr],
 868                                  data->fan[nr][index]);
 869         }
 870
 871         mutex_unlock(&data->update_lock);
 872         return count;
 873 }
 874
 875 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
 876                 const char *buf, size_t count)
 877 {
 878         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 879         int nr = sensor_attr->index;
 880
 881         struct it87_data *data = dev_get_drvdata(dev);
 882         unsigned long val;
 883         int min;
 884         u8 old;
 885
 886         if (kstrtoul(buf, 10, &val) < 0)
 887                 return -EINVAL;
 888
 889         mutex_lock(&data->update_lock);
 890         old = it87_read_value(data, IT87_REG_FAN_DIV);
 891
 892         /* Save fan min limit */
 893         min = FAN_FROM_REG(data->fan[nr][1], DIV_FROM_REG(data->fan_div[nr]));
 894
 895         switch (nr) {
 896         case 0:
 897         case 1:
 898                 data->fan_div[nr] = DIV_TO_REG(val);
 899                 break;
 900         case 2:
 901                 if (val < 8)
 902                         data->fan_div[nr] = 1;
 903                 else
 904                         data->fan_div[nr] = 3;
 905         }
 906         val = old & 0x80;
 907         val |= (data->fan_div[0] & 0x07);
 908         val |= (data->fan_div[1] & 0x07) << 3;
 909         if (data->fan_div[2] == 3)
 910                 val |= 0x1 << 6;
 911         it87_write_value(data, IT87_REG_FAN_DIV, val);
 912
 913         /* Restore fan min limit */
 914         data->fan[nr][1] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
 915         it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan[nr][1]);
 916
 917         mutex_unlock(&data->update_lock);
 918         return count;
 919 }
 920
 921 /* Returns 0 if OK, -EINVAL otherwise */
 922 static int check_trip_points(struct device *dev, int nr)
 923 {
 924         const struct it87_data *data = dev_get_drvdata(dev);
 925         int i, err = 0;
 926
 927         if (has_old_autopwm(data)) {
 928                 for (i = 0; i < 3; i++) {
 929                         if (data->auto_temp[nr][i] > data->auto_temp[nr][i + 1])
 930                                 err = -EINVAL;
 931                 }
 932                 for (i = 0; i < 2; i++) {
 933                         if (data->auto_pwm[nr][i] > data->auto_pwm[nr][i + 1])
 934                                 err = -EINVAL;
 935                 }
 936         }
 937
 938         if (err) {
 939                 dev_err(dev,
 940                         "Inconsistent trip points, not switching to automatic mode\n");
 941                 dev_err(dev, "Adjust the trip points and try again\n");
 942         }
 943         return err;
 944 }
 945
 946 static ssize_t set_pwm_enable(struct device *dev,
 947                 struct device_attribute *attr, const char *buf, size_t count)
 948 {
 949         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
 950         int nr = sensor_attr->index;
 951
 952         struct it87_data *data = dev_get_drvdata(dev);
 953         long val;
 954
 955         if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 2)
 956                 return -EINVAL;
 957
 958         /* Check trip points before switching to automatic mode */
 959         if (val == 2) {
 960                 if (check_trip_points(dev, nr) < 0)
 961                         return -EINVAL;
 962         }
 963
 964         /* IT8603E does not have on/off mode */
 965         if (val == 0 && data->type == it8603)
 966                 return -EINVAL;
 967
 968         mutex_lock(&data->update_lock);
 969
 970         if (val == 0) {
 971                 int tmp;
 972                 /* make sure the fan is on when in on/off mode */
 973                 tmp = it87_read_value(data, IT87_REG_FAN_CTL);
 974                 it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr));
 975                 /* set on/off mode */
 976                 data->fan_main_ctrl &= ~(1 << nr);
 977                 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
 978                                  data->fan_main_ctrl);
 979         } else {
 980                 if (val == 1)                           /* Manual mode */
 981                         data->pwm_ctrl[nr] = has_newer_autopwm(data) ?
 982                                              data->pwm_temp_map[nr] :
 983                                              data->pwm_duty[nr];
 984                 else                                    /* Automatic mode */
 985                         data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
 986                 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
 987
 988                 if (data->type != it8603) {
 989                         /* set SmartGuardian mode */
 990                         data->fan_main_ctrl |= (1 << nr);
 991                         it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
 992                                          data->fan_main_ctrl);
 993                 }
 994         }
 995
 996         mutex_unlock(&data->update_lock);
 997         return count;
 998 }
 999 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
1000                 const char *buf, size_t count)
1001 {
1002         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1003         int nr = sensor_attr->index;
1004
1005         struct it87_data *data = dev_get_drvdata(dev);
1006         long val;
1007
1008         if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 255)
1009                 return -EINVAL;
1010
1011         mutex_lock(&data->update_lock);
1012         if (has_newer_autopwm(data)) {
1013                 /*
1014                  * If we are in automatic mode, the PWM duty cycle register
1015                  * is read-only so we can't write the value.
1016                  */
1017                 if (data->pwm_ctrl[nr] & 0x80) {
1018                         mutex_unlock(&data->update_lock);
1019                         return -EBUSY;
1020                 }
1021                 data->pwm_duty[nr] = pwm_to_reg(data, val);
1022                 it87_write_value(data, IT87_REG_PWM_DUTY(nr),
1023                                  data->pwm_duty[nr]);
1024         } else {
1025                 data->pwm_duty[nr] = pwm_to_reg(data, val);
1026                 /*
1027                  * If we are in manual mode, write the duty cycle immediately;
1028                  * otherwise, just store it for later use.
1029                  */
1030                 if (!(data->pwm_ctrl[nr] & 0x80)) {
1031                         data->pwm_ctrl[nr] = data->pwm_duty[nr];
1032                         it87_write_value(data, IT87_REG_PWM(nr),
1033                                          data->pwm_ctrl[nr]);
1034                 }
1035         }
1036         mutex_unlock(&data->update_lock);
1037         return count;
1038 }
1039 static ssize_t set_pwm_freq(struct device *dev,
1040                 struct device_attribute *attr, const char *buf, size_t count)
1041 {
1042         struct it87_data *data = dev_get_drvdata(dev);
1043         unsigned long val;
1044         int i;
1045
1046         if (kstrtoul(buf, 10, &val) < 0)
1047                 return -EINVAL;
1048
1049         /* Search for the nearest available frequency */
1050         for (i = 0; i < 7; i++) {
1051                 if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2)
1052                         break;
1053         }
1054
1055         mutex_lock(&data->update_lock);
1056         data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL) & 0x8f;
1057         data->fan_ctl |= i << 4;
1058         it87_write_value(data, IT87_REG_FAN_CTL, data->fan_ctl);
1059         mutex_unlock(&data->update_lock);
1060
1061         return count;
1062 }
1063 static ssize_t show_pwm_temp_map(struct device *dev,
1064                 struct device_attribute *attr, char *buf)
1065 {
1066         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1067         int nr = sensor_attr->index;
1068
1069         struct it87_data *data = it87_update_device(dev);
1070         int map;
1071
1072         if (data->pwm_temp_map[nr] < 3)
1073                 map = 1 << data->pwm_temp_map[nr];
1074         else
1075                 map = 0;                        /* Should never happen */
1076         return sprintf(buf, "%d\n", map);
1077 }
1078 static ssize_t set_pwm_temp_map(struct device *dev,
1079                 struct device_attribute *attr, const char *buf, size_t count)
1080 {
1081         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1082         int nr = sensor_attr->index;
1083
1084         struct it87_data *data = dev_get_drvdata(dev);
1085         long val;
1086         u8 reg;
1087
1088         /*
1089          * This check can go away if we ever support automatic fan speed
1090          * control on newer chips.
1091          */
1092         if (!has_old_autopwm(data)) {
1093                 dev_notice(dev, "Mapping change disabled for safety reasons\n");
1094                 return -EINVAL;
1095         }
1096
1097         if (kstrtol(buf, 10, &val) < 0)
1098                 return -EINVAL;
1099
1100         switch (val) {
1101         case (1 << 0):
1102                 reg = 0x00;
1103                 break;
1104         case (1 << 1):
1105                 reg = 0x01;
1106                 break;
1107         case (1 << 2):
1108                 reg = 0x02;
1109                 break;
1110         default:
1111                 return -EINVAL;
1112         }
1113
1114         mutex_lock(&data->update_lock);
1115         data->pwm_temp_map[nr] = reg;
1116         /*
1117          * If we are in automatic mode, write the temp mapping immediately;
1118          * otherwise, just store it for later use.
1119          */
1120         if (data->pwm_ctrl[nr] & 0x80) {
1121                 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
1122                 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
1123         }
1124         mutex_unlock(&data->update_lock);
1125         return count;
1126 }
1127
1128 static ssize_t show_auto_pwm(struct device *dev,
1129                 struct device_attribute *attr, char *buf)
1130 {
1131         struct it87_data *data = it87_update_device(dev);
1132         struct sensor_device_attribute_2 *sensor_attr =
1133                         to_sensor_dev_attr_2(attr);
1134         int nr = sensor_attr->nr;
1135         int point = sensor_attr->index;
1136
1137         return sprintf(buf, "%d\n",
1138                        pwm_from_reg(data, data->auto_pwm[nr][point]));
1139 }
1140
1141 static ssize_t set_auto_pwm(struct device *dev,
1142                 struct device_attribute *attr, const char *buf, size_t count)
1143 {
1144         struct it87_data *data = dev_get_drvdata(dev);
1145         struct sensor_device_attribute_2 *sensor_attr =
1146                         to_sensor_dev_attr_2(attr);
1147         int nr = sensor_attr->nr;
1148         int point = sensor_attr->index;
1149         long val;
1150
1151         if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 255)
1152                 return -EINVAL;
1153
1154         mutex_lock(&data->update_lock);
1155         data->auto_pwm[nr][point] = pwm_to_reg(data, val);
1156         it87_write_value(data, IT87_REG_AUTO_PWM(nr, point),
1157                          data->auto_pwm[nr][point]);
1158         mutex_unlock(&data->update_lock);
1159         return count;
1160 }
1161
1162 static ssize_t show_auto_temp(struct device *dev,
1163                 struct device_attribute *attr, char *buf)
1164 {
1165         struct it87_data *data = it87_update_device(dev);
1166         struct sensor_device_attribute_2 *sensor_attr =
1167                         to_sensor_dev_attr_2(attr);
1168         int nr = sensor_attr->nr;
1169         int point = sensor_attr->index;
1170
1171         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->auto_temp[nr][point]));
1172 }
1173
1174 static ssize_t set_auto_temp(struct device *dev,
1175                 struct device_attribute *attr, const char *buf, size_t count)
1176 {
1177         struct it87_data *data = dev_get_drvdata(dev);
1178         struct sensor_device_attribute_2 *sensor_attr =
1179                         to_sensor_dev_attr_2(attr);
1180         int nr = sensor_attr->nr;
1181         int point = sensor_attr->index;
1182         long val;
1183
1184         if (kstrtol(buf, 10, &val) < 0 || val < -128000 || val > 127000)
1185                 return -EINVAL;
1186
1187         mutex_lock(&data->update_lock);
1188         data->auto_temp[nr][point] = TEMP_TO_REG(val);
1189         it87_write_value(data, IT87_REG_AUTO_TEMP(nr, point),
1190                          data->auto_temp[nr][point]);
1191         mutex_unlock(&data->update_lock);
1192         return count;
1193 }
1194
1195 static SENSOR_DEVICE_ATTR_2(fan1_input, S_IRUGO, show_fan, NULL, 0, 0);
1196 static SENSOR_DEVICE_ATTR_2(fan1_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1197                             0, 1);
1198 static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR, show_fan_div,
1199                           set_fan_div, 0);
1200
1201 static SENSOR_DEVICE_ATTR_2(fan2_input, S_IRUGO, show_fan, NULL, 1, 0);
1202 static SENSOR_DEVICE_ATTR_2(fan2_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1203                             1, 1);
1204 static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR, show_fan_div,
1205                           set_fan_div, 1);
1206
1207 static SENSOR_DEVICE_ATTR_2(fan3_input, S_IRUGO, show_fan, NULL, 2, 0);
1208 static SENSOR_DEVICE_ATTR_2(fan3_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1209                             2, 1);
1210 static SENSOR_DEVICE_ATTR(fan3_div, S_IRUGO | S_IWUSR, show_fan_div,
1211                           set_fan_div, 2);
1212
1213 static SENSOR_DEVICE_ATTR_2(fan4_input, S_IRUGO, show_fan, NULL, 3, 0);
1214 static SENSOR_DEVICE_ATTR_2(fan4_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1215                             3, 1);
1216
1217 static SENSOR_DEVICE_ATTR_2(fan5_input, S_IRUGO, show_fan, NULL, 4, 0);
1218 static SENSOR_DEVICE_ATTR_2(fan5_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1219                             4, 1);
1220
1221 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR,
1222                           show_pwm_enable, set_pwm_enable, 0);
1223 static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm, set_pwm, 0);
1224 static DEVICE_ATTR(pwm1_freq, S_IRUGO | S_IWUSR, show_pwm_freq, set_pwm_freq);
1225 static SENSOR_DEVICE_ATTR(pwm1_auto_channels_temp, S_IRUGO | S_IWUSR,
1226                           show_pwm_temp_map, set_pwm_temp_map, 0);
1227 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_pwm, S_IRUGO | S_IWUSR,
1228                             show_auto_pwm, set_auto_pwm, 0, 0);
1229 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point2_pwm, S_IRUGO | S_IWUSR,
1230                             show_auto_pwm, set_auto_pwm, 0, 1);
1231 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point3_pwm, S_IRUGO | S_IWUSR,
1232                             show_auto_pwm, set_auto_pwm, 0, 2);
1233 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point4_pwm, S_IRUGO,
1234                             show_auto_pwm, NULL, 0, 3);
1235 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_temp, S_IRUGO | S_IWUSR,
1236                             show_auto_temp, set_auto_temp, 0, 1);
1237 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_temp_hyst, S_IRUGO | S_IWUSR,
1238                             show_auto_temp, set_auto_temp, 0, 0);
1239 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point2_temp, S_IRUGO | S_IWUSR,
1240                             show_auto_temp, set_auto_temp, 0, 2);
1241 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point3_temp, S_IRUGO | S_IWUSR,
1242                             show_auto_temp, set_auto_temp, 0, 3);
1243 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point4_temp, S_IRUGO | S_IWUSR,
1244                             show_auto_temp, set_auto_temp, 0, 4);
1245
1246 static SENSOR_DEVICE_ATTR(pwm2_enable, S_IRUGO | S_IWUSR,
1247                           show_pwm_enable, set_pwm_enable, 1);
1248 static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, show_pwm, set_pwm, 1);
1249 static DEVICE_ATTR(pwm2_freq, S_IRUGO, show_pwm_freq, NULL);
1250 static SENSOR_DEVICE_ATTR(pwm2_auto_channels_temp, S_IRUGO | S_IWUSR,
1251                           show_pwm_temp_map, set_pwm_temp_map, 1);
1252 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_pwm, S_IRUGO | S_IWUSR,
1253                             show_auto_pwm, set_auto_pwm, 1, 0);
1254 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point2_pwm, S_IRUGO | S_IWUSR,
1255                             show_auto_pwm, set_auto_pwm, 1, 1);
1256 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point3_pwm, S_IRUGO | S_IWUSR,
1257                             show_auto_pwm, set_auto_pwm, 1, 2);
1258 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point4_pwm, S_IRUGO,
1259                             show_auto_pwm, NULL, 1, 3);
1260 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_temp, S_IRUGO | S_IWUSR,
1261                             show_auto_temp, set_auto_temp, 1, 1);
1262 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_temp_hyst, S_IRUGO | S_IWUSR,
1263                             show_auto_temp, set_auto_temp, 1, 0);
1264 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point2_temp, S_IRUGO | S_IWUSR,
1265                             show_auto_temp, set_auto_temp, 1, 2);
1266 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point3_temp, S_IRUGO | S_IWUSR,
1267                             show_auto_temp, set_auto_temp, 1, 3);
1268 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point4_temp, S_IRUGO | S_IWUSR,
1269                             show_auto_temp, set_auto_temp, 1, 4);
1270
1271 static SENSOR_DEVICE_ATTR(pwm3_enable, S_IRUGO | S_IWUSR,
1272                           show_pwm_enable, set_pwm_enable, 2);
1273 static SENSOR_DEVICE_ATTR(pwm3, S_IRUGO | S_IWUSR, show_pwm, set_pwm, 2);
1274 static DEVICE_ATTR(pwm3_freq, S_IRUGO, show_pwm_freq, NULL);
1275 static SENSOR_DEVICE_ATTR(pwm3_auto_channels_temp, S_IRUGO | S_IWUSR,
1276                           show_pwm_temp_map, set_pwm_temp_map, 2);
1277 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_pwm, S_IRUGO | S_IWUSR,
1278                             show_auto_pwm, set_auto_pwm, 2, 0);
1279 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point2_pwm, S_IRUGO | S_IWUSR,
1280                             show_auto_pwm, set_auto_pwm, 2, 1);
1281 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point3_pwm, S_IRUGO | S_IWUSR,
1282                             show_auto_pwm, set_auto_pwm, 2, 2);
1283 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point4_pwm, S_IRUGO,
1284                             show_auto_pwm, NULL, 2, 3);
1285 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_temp, S_IRUGO | S_IWUSR,
1286                             show_auto_temp, set_auto_temp, 2, 1);
1287 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_temp_hyst, S_IRUGO | S_IWUSR,
1288                             show_auto_temp, set_auto_temp, 2, 0);
1289 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point2_temp, S_IRUGO | S_IWUSR,
1290                             show_auto_temp, set_auto_temp, 2, 2);
1291 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point3_temp, S_IRUGO | S_IWUSR,
1292                             show_auto_temp, set_auto_temp, 2, 3);
1293 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point4_temp, S_IRUGO | S_IWUSR,
1294                             show_auto_temp, set_auto_temp, 2, 4);
1295
1296 /* Alarms */
1297 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
1298                 char *buf)
1299 {
1300         struct it87_data *data = it87_update_device(dev);
1301         return sprintf(buf, "%u\n", data->alarms);
1302 }
1303 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
1304
1305 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
1306                 char *buf)
1307 {
1308         int bitnr = to_sensor_dev_attr(attr)->index;
1309         struct it87_data *data = it87_update_device(dev);
1310         return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
1311 }
1312
1313 static ssize_t clear_intrusion(struct device *dev, struct device_attribute
1314                 *attr, const char *buf, size_t count)
1315 {
1316         struct it87_data *data = dev_get_drvdata(dev);
1317         long val;
1318         int config;
1319
1320         if (kstrtol(buf, 10, &val) < 0 || val != 0)
1321                 return -EINVAL;
1322
1323         mutex_lock(&data->update_lock);
1324         config = it87_read_value(data, IT87_REG_CONFIG);
1325         if (config < 0) {
1326                 count = config;
1327         } else {
1328                 config |= 1 << 5;
1329                 it87_write_value(data, IT87_REG_CONFIG, config);
1330                 /* Invalidate cache to force re-read */
1331                 data->valid = 0;
1332         }
1333         mutex_unlock(&data->update_lock);
1334
1335         return count;
1336 }
1337
1338 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8);
1339 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9);
1340 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10);
1341 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 11);
1342 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 12);
1343 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 13);
1344 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 14);
1345 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 15);
1346 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 0);
1347 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1);
1348 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 2);
1349 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 3);
1350 static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6);
1351 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16);
1352 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17);
1353 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18);
1354 static SENSOR_DEVICE_ATTR(intrusion0_alarm, S_IRUGO | S_IWUSR,
1355                           show_alarm, clear_intrusion, 4);
1356
1357 static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
1358                 char *buf)
1359 {
1360         int bitnr = to_sensor_dev_attr(attr)->index;
1361         struct it87_data *data = it87_update_device(dev);
1362         return sprintf(buf, "%u\n", (data->beeps >> bitnr) & 1);
1363 }
1364 static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
1365                 const char *buf, size_t count)
1366 {
1367         int bitnr = to_sensor_dev_attr(attr)->index;
1368         struct it87_data *data = dev_get_drvdata(dev);
1369         long val;
1370
1371         if (kstrtol(buf, 10, &val) < 0
1372          || (val != 0 && val != 1))
1373                 return -EINVAL;
1374
1375         mutex_lock(&data->update_lock);
1376         data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
1377         if (val)
1378                 data->beeps |= (1 << bitnr);
1379         else
1380                 data->beeps &= ~(1 << bitnr);
1381         it87_write_value(data, IT87_REG_BEEP_ENABLE, data->beeps);
1382         mutex_unlock(&data->update_lock);
1383         return count;
1384 }
1385
1386 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR,
1387                           show_beep, set_beep, 1);
1388 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO, show_beep, NULL, 1);
1389 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO, show_beep, NULL, 1);
1390 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO, show_beep, NULL, 1);
1391 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO, show_beep, NULL, 1);
1392 static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO, show_beep, NULL, 1);
1393 static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO, show_beep, NULL, 1);
1394 static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO, show_beep, NULL, 1);
1395 /* fanX_beep writability is set later */
1396 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO, show_beep, set_beep, 0);
1397 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO, show_beep, set_beep, 0);
1398 static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO, show_beep, set_beep, 0);
1399 static SENSOR_DEVICE_ATTR(fan4_beep, S_IRUGO, show_beep, set_beep, 0);
1400 static SENSOR_DEVICE_ATTR(fan5_beep, S_IRUGO, show_beep, set_beep, 0);
1401 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR,
1402                           show_beep, set_beep, 2);
1403 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO, show_beep, NULL, 2);
1404 static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO, show_beep, NULL, 2);
1405
1406 static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr,
1407                 char *buf)
1408 {
1409         struct it87_data *data = dev_get_drvdata(dev);
1410         return sprintf(buf, "%u\n", data->vrm);
1411 }
1412 static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr,
1413                 const char *buf, size_t count)
1414 {
1415         struct it87_data *data = dev_get_drvdata(dev);
1416         unsigned long val;
1417
1418         if (kstrtoul(buf, 10, &val) < 0)
1419                 return -EINVAL;
1420
1421         data->vrm = val;
1422
1423         return count;
1424 }
1425 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
1426
1427 static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr,
1428                 char *buf)
1429 {
1430         struct it87_data *data = it87_update_device(dev);
1431         return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm));
1432 }
1433 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
1434
1435 static ssize_t show_label(struct device *dev, struct device_attribute *attr,
1436                 char *buf)
1437 {
1438         static const char * const labels[] = {
1439                 "+5V",
1440                 "5VSB",
1441                 "Vbat",
1442         };
1443         static const char * const labels_it8721[] = {
1444                 "+3.3V",
1445                 "3VSB",
1446                 "Vbat",
1447         };
1448         struct it87_data *data = dev_get_drvdata(dev);
1449         int nr = to_sensor_dev_attr(attr)->index;
1450
1451         return sprintf(buf, "%s\n", has_12mv_adc(data) ? labels_it8721[nr]
1452                                                        : labels[nr]);
1453 }
1454 static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_label, NULL, 0);
1455 static SENSOR_DEVICE_ATTR(in7_label, S_IRUGO, show_label, NULL, 1);
1456 static SENSOR_DEVICE_ATTR(in8_label, S_IRUGO, show_label, NULL, 2);
1457 /* special AVCC3 IT8603E in9 */
1458 static SENSOR_DEVICE_ATTR(in9_label, S_IRUGO, show_label, NULL, 0);
1459
1460 static ssize_t show_name(struct device *dev, struct device_attribute
1461                          *devattr, char *buf)
1462 {
1463         struct it87_data *data = dev_get_drvdata(dev);
1464         return sprintf(buf, "%s\n", data->name);
1465 }
1466 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
1467
1468 static struct attribute *it87_attributes_in[10][5] = {
1469 {
1470         &sensor_dev_attr_in0_input.dev_attr.attr,
1471         &sensor_dev_attr_in0_min.dev_attr.attr,
1472         &sensor_dev_attr_in0_max.dev_attr.attr,
1473         &sensor_dev_attr_in0_alarm.dev_attr.attr,
1474         NULL
1475 }, {
1476         &sensor_dev_attr_in1_input.dev_attr.attr,
1477         &sensor_dev_attr_in1_min.dev_attr.attr,
1478         &sensor_dev_attr_in1_max.dev_attr.attr,
1479         &sensor_dev_attr_in1_alarm.dev_attr.attr,
1480         NULL
1481 }, {
1482         &sensor_dev_attr_in2_input.dev_attr.attr,
1483         &sensor_dev_attr_in2_min.dev_attr.attr,
1484         &sensor_dev_attr_in2_max.dev_attr.attr,
1485         &sensor_dev_attr_in2_alarm.dev_attr.attr,
1486         NULL
1487 }, {
1488         &sensor_dev_attr_in3_input.dev_attr.attr,
1489         &sensor_dev_attr_in3_min.dev_attr.attr,
1490         &sensor_dev_attr_in3_max.dev_attr.attr,
1491         &sensor_dev_attr_in3_alarm.dev_attr.attr,
1492         NULL
1493 }, {
1494         &sensor_dev_attr_in4_input.dev_attr.attr,
1495         &sensor_dev_attr_in4_min.dev_attr.attr,
1496         &sensor_dev_attr_in4_max.dev_attr.attr,
1497         &sensor_dev_attr_in4_alarm.dev_attr.attr,
1498         NULL
1499 }, {
1500         &sensor_dev_attr_in5_input.dev_attr.attr,
1501         &sensor_dev_attr_in5_min.dev_attr.attr,
1502         &sensor_dev_attr_in5_max.dev_attr.attr,
1503         &sensor_dev_attr_in5_alarm.dev_attr.attr,
1504         NULL
1505 }, {
1506         &sensor_dev_attr_in6_input.dev_attr.attr,
1507         &sensor_dev_attr_in6_min.dev_attr.attr,
1508         &sensor_dev_attr_in6_max.dev_attr.attr,
1509         &sensor_dev_attr_in6_alarm.dev_attr.attr,
1510         NULL
1511 }, {
1512         &sensor_dev_attr_in7_input.dev_attr.attr,
1513         &sensor_dev_attr_in7_min.dev_attr.attr,
1514         &sensor_dev_attr_in7_max.dev_attr.attr,
1515         &sensor_dev_attr_in7_alarm.dev_attr.attr,
1516         NULL
1517 }, {
1518         &sensor_dev_attr_in8_input.dev_attr.attr,
1519         NULL
1520 }, {
1521         &sensor_dev_attr_in9_input.dev_attr.attr,
1522         NULL
1523 } };
1524
1525 static const struct attribute_group it87_group_in[10] = {
1526         { .attrs = it87_attributes_in[0] },
1527         { .attrs = it87_attributes_in[1] },
1528         { .attrs = it87_attributes_in[2] },
1529         { .attrs = it87_attributes_in[3] },
1530         { .attrs = it87_attributes_in[4] },
1531         { .attrs = it87_attributes_in[5] },
1532         { .attrs = it87_attributes_in[6] },
1533         { .attrs = it87_attributes_in[7] },
1534         { .attrs = it87_attributes_in[8] },
1535         { .attrs = it87_attributes_in[9] },
1536 };
1537
1538 static struct attribute *it87_attributes_temp[3][6] = {
1539 {
1540         &sensor_dev_attr_temp1_input.dev_attr.attr,
1541         &sensor_dev_attr_temp1_max.dev_attr.attr,
1542         &sensor_dev_attr_temp1_min.dev_attr.attr,
1543         &sensor_dev_attr_temp1_type.dev_attr.attr,
1544         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1545         NULL
1546 } , {
1547         &sensor_dev_attr_temp2_input.dev_attr.attr,
1548         &sensor_dev_attr_temp2_max.dev_attr.attr,
1549         &sensor_dev_attr_temp2_min.dev_attr.attr,
1550         &sensor_dev_attr_temp2_type.dev_attr.attr,
1551         &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1552         NULL
1553 } , {
1554         &sensor_dev_attr_temp3_input.dev_attr.attr,
1555         &sensor_dev_attr_temp3_max.dev_attr.attr,
1556         &sensor_dev_attr_temp3_min.dev_attr.attr,
1557         &sensor_dev_attr_temp3_type.dev_attr.attr,
1558         &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1559         NULL
1560 } };
1561
1562 static const struct attribute_group it87_group_temp[3] = {
1563         { .attrs = it87_attributes_temp[0] },
1564         { .attrs = it87_attributes_temp[1] },
1565         { .attrs = it87_attributes_temp[2] },
1566 };
1567
1568 static struct attribute *it87_attributes_temp_offset[] = {
1569         &sensor_dev_attr_temp1_offset.dev_attr.attr,
1570         &sensor_dev_attr_temp2_offset.dev_attr.attr,
1571         &sensor_dev_attr_temp3_offset.dev_attr.attr,
1572 };
1573
1574 static struct attribute *it87_attributes[] = {
1575         &dev_attr_alarms.attr,
1576         &sensor_dev_attr_intrusion0_alarm.dev_attr.attr,
1577         &dev_attr_name.attr,
1578         NULL
1579 };
1580
1581 static const struct attribute_group it87_group = {
1582         .attrs = it87_attributes,
1583 };
1584
1585 static struct attribute *it87_attributes_in_beep[] = {
1586         &sensor_dev_attr_in0_beep.dev_attr.attr,
1587         &sensor_dev_attr_in1_beep.dev_attr.attr,
1588         &sensor_dev_attr_in2_beep.dev_attr.attr,
1589         &sensor_dev_attr_in3_beep.dev_attr.attr,
1590         &sensor_dev_attr_in4_beep.dev_attr.attr,
1591         &sensor_dev_attr_in5_beep.dev_attr.attr,
1592         &sensor_dev_attr_in6_beep.dev_attr.attr,
1593         &sensor_dev_attr_in7_beep.dev_attr.attr,
1594         NULL,
1595         NULL,
1596 };
1597
1598 static struct attribute *it87_attributes_temp_beep[] = {
1599         &sensor_dev_attr_temp1_beep.dev_attr.attr,
1600         &sensor_dev_attr_temp2_beep.dev_attr.attr,
1601         &sensor_dev_attr_temp3_beep.dev_attr.attr,
1602 };
1603
1604 static struct attribute *it87_attributes_fan[5][3+1] = { {
1605         &sensor_dev_attr_fan1_input.dev_attr.attr,
1606         &sensor_dev_attr_fan1_min.dev_attr.attr,
1607         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1608         NULL
1609 }, {
1610         &sensor_dev_attr_fan2_input.dev_attr.attr,
1611         &sensor_dev_attr_fan2_min.dev_attr.attr,
1612         &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1613         NULL
1614 }, {
1615         &sensor_dev_attr_fan3_input.dev_attr.attr,
1616         &sensor_dev_attr_fan3_min.dev_attr.attr,
1617         &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1618         NULL
1619 }, {
1620         &sensor_dev_attr_fan4_input.dev_attr.attr,
1621         &sensor_dev_attr_fan4_min.dev_attr.attr,
1622         &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1623         NULL
1624 }, {
1625         &sensor_dev_attr_fan5_input.dev_attr.attr,
1626         &sensor_dev_attr_fan5_min.dev_attr.attr,
1627         &sensor_dev_attr_fan5_alarm.dev_attr.attr,
1628         NULL
1629 } };
1630
1631 static const struct attribute_group it87_group_fan[5] = {
1632         { .attrs = it87_attributes_fan[0] },
1633         { .attrs = it87_attributes_fan[1] },
1634         { .attrs = it87_attributes_fan[2] },
1635         { .attrs = it87_attributes_fan[3] },
1636         { .attrs = it87_attributes_fan[4] },
1637 };
1638
1639 static const struct attribute *it87_attributes_fan_div[] = {
1640         &sensor_dev_attr_fan1_div.dev_attr.attr,
1641         &sensor_dev_attr_fan2_div.dev_attr.attr,
1642         &sensor_dev_attr_fan3_div.dev_attr.attr,
1643 };
1644
1645 static struct attribute *it87_attributes_pwm[3][4+1] = { {
1646         &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1647         &sensor_dev_attr_pwm1.dev_attr.attr,
1648         &dev_attr_pwm1_freq.attr,
1649         &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1650         NULL
1651 }, {
1652         &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1653         &sensor_dev_attr_pwm2.dev_attr.attr,
1654         &dev_attr_pwm2_freq.attr,
1655         &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1656         NULL
1657 }, {
1658         &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1659         &sensor_dev_attr_pwm3.dev_attr.attr,
1660         &dev_attr_pwm3_freq.attr,
1661         &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1662         NULL
1663 } };
1664
1665 static const struct attribute_group it87_group_pwm[3] = {
1666         { .attrs = it87_attributes_pwm[0] },
1667         { .attrs = it87_attributes_pwm[1] },
1668         { .attrs = it87_attributes_pwm[2] },
1669 };
1670
1671 static struct attribute *it87_attributes_autopwm[3][9+1] = { {
1672         &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1673         &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1674         &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
1675         &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr,
1676         &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
1677         &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr,
1678         &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
1679         &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
1680         &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr,
1681         NULL
1682 }, {
1683         &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1684         &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1685         &sensor_dev_attr_pwm2_auto_point3_pwm.dev_attr.attr,
1686         &sensor_dev_attr_pwm2_auto_point4_pwm.dev_attr.attr,
1687         &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
1688         &sensor_dev_attr_pwm2_auto_point1_temp_hyst.dev_attr.attr,
1689         &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
1690         &sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr,
1691         &sensor_dev_attr_pwm2_auto_point4_temp.dev_attr.attr,
1692         NULL
1693 }, {
1694         &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1695         &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1696         &sensor_dev_attr_pwm3_auto_point3_pwm.dev_attr.attr,
1697         &sensor_dev_attr_pwm3_auto_point4_pwm.dev_attr.attr,
1698         &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
1699         &sensor_dev_attr_pwm3_auto_point1_temp_hyst.dev_attr.attr,
1700         &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
1701         &sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr,
1702         &sensor_dev_attr_pwm3_auto_point4_temp.dev_attr.attr,
1703         NULL
1704 } };
1705
1706 static const struct attribute_group it87_group_autopwm[3] = {
1707         { .attrs = it87_attributes_autopwm[0] },
1708         { .attrs = it87_attributes_autopwm[1] },
1709         { .attrs = it87_attributes_autopwm[2] },
1710 };
1711
1712 static struct attribute *it87_attributes_fan_beep[] = {
1713         &sensor_dev_attr_fan1_beep.dev_attr.attr,
1714         &sensor_dev_attr_fan2_beep.dev_attr.attr,
1715         &sensor_dev_attr_fan3_beep.dev_attr.attr,
1716         &sensor_dev_attr_fan4_beep.dev_attr.attr,
1717         &sensor_dev_attr_fan5_beep.dev_attr.attr,
1718 };
1719
1720 static struct attribute *it87_attributes_vid[] = {
1721         &dev_attr_vrm.attr,
1722         &dev_attr_cpu0_vid.attr,
1723         NULL
1724 };
1725
1726 static const struct attribute_group it87_group_vid = {
1727         .attrs = it87_attributes_vid,
1728 };
1729
1730 static struct attribute *it87_attributes_label[] = {
1731         &sensor_dev_attr_in3_label.dev_attr.attr,
1732         &sensor_dev_attr_in7_label.dev_attr.attr,
1733         &sensor_dev_attr_in8_label.dev_attr.attr,
1734         &sensor_dev_attr_in9_label.dev_attr.attr,
1735         NULL
1736 };
1737
1738 static const struct attribute_group it87_group_label = {
1739         .attrs = it87_attributes_label,
1740 };
1741
1742 /* SuperIO detection - will change isa_address if a chip is found */
1743 static int __init it87_find(unsigned short *address,
1744         struct it87_sio_data *sio_data)
1745 {
1746         int err;
1747         u16 chip_type;
1748         const char *board_vendor, *board_name;
1749
1750         err = superio_enter();
1751         if (err)
1752                 return err;
1753
1754         err = -ENODEV;
1755         chip_type = force_id ? force_id : superio_inw(DEVID);
1756
1757         switch (chip_type) {
1758         case IT8705F_DEVID:
1759                 sio_data->type = it87;
1760                 break;
1761         case IT8712F_DEVID:
1762                 sio_data->type = it8712;
1763                 break;
1764         case IT8716F_DEVID:
1765         case IT8726F_DEVID:
1766                 sio_data->type = it8716;
1767                 break;
1768         case IT8718F_DEVID:
1769                 sio_data->type = it8718;
1770                 break;
1771         case IT8720F_DEVID:
1772                 sio_data->type = it8720;
1773                 break;
1774         case IT8721F_DEVID:
1775                 sio_data->type = it8721;
1776                 break;
1777         case IT8728F_DEVID:
1778                 sio_data->type = it8728;
1779                 break;
1780         case IT8771E_DEVID:
1781                 sio_data->type = it8771;
1782                 break;
1783         case IT8772E_DEVID:
1784                 sio_data->type = it8772;
1785                 break;
1786         case IT8781F_DEVID:
1787                 sio_data->type = it8781;
1788                 break;
1789         case IT8782F_DEVID:
1790                 sio_data->type = it8782;
1791                 break;
1792         case IT8783E_DEVID:
1793                 sio_data->type = it8783;
1794                 break;
1795         case IT8603E_DEVID:
1796         case IT8623E_DEVID:
1797                 sio_data->type = it8603;
1798                 break;
1799         case 0xffff:    /* No device at all */
1800                 goto exit;
1801         default:
1802                 pr_debug("Unsupported chip (DEVID=0x%x)\n", chip_type);
1803                 goto exit;
1804         }
1805
1806         superio_select(PME);
1807         if (!(superio_inb(IT87_ACT_REG) & 0x01)) {
1808                 pr_info("Device not activated, skipping\n");
1809                 goto exit;
1810         }
1811
1812         *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1);
1813         if (*address == 0) {
1814                 pr_info("Base address not set, skipping\n");
1815                 goto exit;
1816         }
1817
1818         err = 0;
1819         sio_data->revision = superio_inb(DEVREV) & 0x0f;
1820         pr_info("Found IT%04x%c chip at 0x%x, revision %d\n", chip_type,
1821                 chip_type == 0x8771 || chip_type == 0x8772 ||
1822                 chip_type == 0x8603 ? 'E' : 'F', *address,
1823                 sio_data->revision);
1824
1825         /* in8 (Vbat) is always internal */
1826         sio_data->internal = (1 << 2);
1827         /* Only the IT8603E has in9 */
1828         if (sio_data->type != it8603)
1829                 sio_data->skip_in |= (1 << 9);
1830
1831         if (!(it87_devices[sio_data->type].features & FEAT_VID))
1832                 sio_data->skip_vid = 1;
1833
1834         /* Read GPIO config and VID value from LDN 7 (GPIO) */
1835         if (sio_data->type == it87) {
1836                 /* The IT8705F has a different LD number for GPIO */
1837                 superio_select(5);
1838                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1839         } else if (sio_data->type == it8783) {
1840                 int reg25, reg27, reg2a, reg2c, regef;
1841
1842                 superio_select(GPIO);
1843
1844                 reg25 = superio_inb(IT87_SIO_GPIO1_REG);
1845                 reg27 = superio_inb(IT87_SIO_GPIO3_REG);
1846                 reg2a = superio_inb(IT87_SIO_PINX1_REG);
1847                 reg2c = superio_inb(IT87_SIO_PINX2_REG);
1848                 regef = superio_inb(IT87_SIO_SPI_REG);
1849
1850                 /* Check if fan3 is there or not */
1851                 if ((reg27 & (1 << 0)) || !(reg2c & (1 << 2)))
1852                         sio_data->skip_fan |= (1 << 2);
1853                 if ((reg25 & (1 << 4))
1854                     || (!(reg2a & (1 << 1)) && (regef & (1 << 0))))
1855                         sio_data->skip_pwm |= (1 << 2);
1856
1857                 /* Check if fan2 is there or not */
1858                 if (reg27 & (1 << 7))
1859                         sio_data->skip_fan |= (1 << 1);
1860                 if (reg27 & (1 << 3))
1861                         sio_data->skip_pwm |= (1 << 1);
1862
1863                 /* VIN5 */
1864                 if ((reg27 & (1 << 0)) || (reg2c & (1 << 2)))
1865                         sio_data->skip_in |= (1 << 5); /* No VIN5 */
1866
1867                 /* VIN6 */
1868                 if (reg27 & (1 << 1))
1869                         sio_data->skip_in |= (1 << 6); /* No VIN6 */
1870
1871                 /*
1872                  * VIN7
1873                  * Does not depend on bit 2 of Reg2C, contrary to datasheet.
1874                  */
1875                 if (reg27 & (1 << 2)) {
1876                         /*
1877                          * The data sheet is a bit unclear regarding the
1878                          * internal voltage divider for VCCH5V. It says
1879                          * "This bit enables and switches VIN7 (pin 91) to the
1880                          * internal voltage divider for VCCH5V".
1881                          * This is different to other chips, where the internal
1882                          * voltage divider would connect VIN7 to an internal
1883                          * voltage source. Maybe that is the case here as well.
1884                          *
1885                          * Since we don't know for sure, re-route it if that is
1886                          * not the case, and ask the user to report if the
1887                          * resulting voltage is sane.
1888                          */
1889                         if (!(reg2c & (1 << 1))) {
1890                                 reg2c |= (1 << 1);
1891                                 superio_outb(IT87_SIO_PINX2_REG, reg2c);
1892                                 pr_notice("Routing internal VCCH5V to in7.\n");
1893                         }
1894                         pr_notice("in7 routed to internal voltage divider, with external pin disabled.\n");
1895                         pr_notice("Please report if it displays a reasonable voltage.\n");
1896                 }
1897
1898                 if (reg2c & (1 << 0))
1899                         sio_data->internal |= (1 << 0);
1900                 if (reg2c & (1 << 1))
1901                         sio_data->internal |= (1 << 1);
1902
1903                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1904         } else if (sio_data->type == it8603) {
1905                 int reg27, reg29;
1906
1907                 superio_select(GPIO);
1908
1909                 reg27 = superio_inb(IT87_SIO_GPIO3_REG);
1910
1911                 /* Check if fan3 is there or not */
1912                 if (reg27 & (1 << 6))
1913                         sio_data->skip_pwm |= (1 << 2);
1914                 if (reg27 & (1 << 7))
1915                         sio_data->skip_fan |= (1 << 2);
1916
1917                 /* Check if fan2 is there or not */
1918                 reg29 = superio_inb(IT87_SIO_GPIO5_REG);
1919                 if (reg29 & (1 << 1))
1920                         sio_data->skip_pwm |= (1 << 1);
1921                 if (reg29 & (1 << 2))
1922                         sio_data->skip_fan |= (1 << 1);
1923
1924                 sio_data->skip_in |= (1 << 5); /* No VIN5 */
1925                 sio_data->skip_in |= (1 << 6); /* No VIN6 */
1926
1927                 /* no fan4 */
1928                 sio_data->skip_pwm |= (1 << 3);
1929                 sio_data->skip_fan |= (1 << 3);
1930
1931                 sio_data->internal |= (1 << 1); /* in7 is VSB */
1932                 sio_data->internal |= (1 << 3); /* in9 is AVCC */
1933
1934                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1935         } else {
1936                 int reg;
1937                 bool uart6;
1938
1939                 superio_select(GPIO);
1940
1941                 reg = superio_inb(IT87_SIO_GPIO3_REG);
1942                 if (!sio_data->skip_vid) {
1943                         /* We need at least 4 VID pins */
1944                         if (reg & 0x0f) {
1945                                 pr_info("VID is disabled (pins used for GPIO)\n");
1946                                 sio_data->skip_vid = 1;
1947                         }
1948                 }
1949
1950                 /* Check if fan3 is there or not */
1951                 if (reg & (1 << 6))
1952                         sio_data->skip_pwm |= (1 << 2);
1953                 if (reg & (1 << 7))
1954                         sio_data->skip_fan |= (1 << 2);
1955
1956                 /* Check if fan2 is there or not */
1957                 reg = superio_inb(IT87_SIO_GPIO5_REG);
1958                 if (reg & (1 << 1))
1959                         sio_data->skip_pwm |= (1 << 1);
1960                 if (reg & (1 << 2))
1961                         sio_data->skip_fan |= (1 << 1);
1962
1963                 if (!sio_data->skip_vid)
1964                         sio_data->vid_value = superio_inb(IT87_SIO_VID_REG);
1965
1966                 reg = superio_inb(IT87_SIO_PINX2_REG);
1967
1968                 uart6 = sio_data->type == it8782 && (reg & (1 << 2));
1969
1970                 /*
1971                  * The IT8720F has no VIN7 pin, so VCCH should always be
1972                  * routed internally to VIN7 with an internal divider.
1973                  * Curiously, there still is a configuration bit to control
1974                  * this, which means it can be set incorrectly. And even
1975                  * more curiously, many boards out there are improperly
1976                  * configured, even though the IT8720F datasheet claims
1977                  * that the internal routing of VCCH to VIN7 is the default
1978                  * setting. So we force the internal routing in this case.
1979                  *
1980                  * On IT8782F, VIN7 is multiplexed with one of the UART6 pins.
1981                  * If UART6 is enabled, re-route VIN7 to the internal divider
1982                  * if that is not already the case.
1983                  */
1984                 if ((sio_data->type == it8720 || uart6) && !(reg & (1 << 1))) {
1985                         reg |= (1 << 1);
1986                         superio_outb(IT87_SIO_PINX2_REG, reg);
1987                         pr_notice("Routing internal VCCH to in7\n");
1988                 }
1989                 if (reg & (1 << 0))
1990                         sio_data->internal |= (1 << 0);
1991                 if ((reg & (1 << 1)) || sio_data->type == it8721 ||
1992                     sio_data->type == it8728 ||
1993                     sio_data->type == it8771 ||
1994                     sio_data->type == it8772)
1995                         sio_data->internal |= (1 << 1);
1996
1997                 /*
1998                  * On IT8782F, UART6 pins overlap with VIN5, VIN6, and VIN7.
1999                  * While VIN7 can be routed to the internal voltage divider,
2000                  * VIN5 and VIN6 are not available if UART6 is enabled.
2001                  *
2002                  * Also, temp3 is not available if UART6 is enabled and TEMPIN3
2003                  * is the temperature source. Since we can not read the
2004                  * temperature source here, skip_temp is preliminary.
2005                  */
2006                 if (uart6) {
2007                         sio_data->skip_in |= (1 << 5) | (1 << 6);
2008                         sio_data->skip_temp |= (1 << 2);
2009                 }
2010
2011                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
2012         }
2013         if (sio_data->beep_pin)
2014                 pr_info("Beeping is supported\n");
2015
2016         /* Disable specific features based on DMI strings */
2017         board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
2018         board_name = dmi_get_system_info(DMI_BOARD_NAME);
2019         if (board_vendor && board_name) {
2020                 if (strcmp(board_vendor, "nVIDIA") == 0
2021                  && strcmp(board_name, "FN68PT") == 0) {
2022                         /*
2023                          * On the Shuttle SN68PT, FAN_CTL2 is apparently not
2024                          * connected to a fan, but to something else. One user
2025                          * has reported instant system power-off when changing
2026                          * the PWM2 duty cycle, so we disable it.
2027                          * I use the board name string as the trigger in case
2028                          * the same board is ever used in other systems.
2029                          */
2030                         pr_info("Disabling pwm2 due to hardware constraints\n");
2031                         sio_data->skip_pwm = (1 << 1);
2032                 }
2033         }
2034
2035 exit:
2036         superio_exit();
2037         return err;
2038 }
2039
2040 static void it87_remove_files(struct device *dev)
2041 {
2042         struct it87_data *data = platform_get_drvdata(pdev);
2043         struct it87_sio_data *sio_data = dev_get_platdata(dev);
2044         int i;
2045
2046         sysfs_remove_group(&dev->kobj, &it87_group);
2047         for (i = 0; i < 10; i++) {
2048                 if (sio_data->skip_in & (1 << i))
2049                         continue;
2050                 sysfs_remove_group(&dev->kobj, &it87_group_in[i]);
2051                 if (it87_attributes_in_beep[i])
2052                         sysfs_remove_file(&dev->kobj,
2053                                           it87_attributes_in_beep[i]);
2054         }
2055         for (i = 0; i < 3; i++) {
2056                 if (!(data->has_temp & (1 << i)))
2057                         continue;
2058                 sysfs_remove_group(&dev->kobj, &it87_group_temp[i]);
2059                 if (has_temp_offset(data))
2060                         sysfs_remove_file(&dev->kobj,
2061                                           it87_attributes_temp_offset[i]);
2062                 if (sio_data->beep_pin)
2063                         sysfs_remove_file(&dev->kobj,
2064                                           it87_attributes_temp_beep[i]);
2065         }
2066         for (i = 0; i < 5; i++) {
2067                 if (!(data->has_fan & (1 << i)))
2068                         continue;
2069                 sysfs_remove_group(&dev->kobj, &it87_group_fan[i]);
2070                 if (sio_data->beep_pin)
2071                         sysfs_remove_file(&dev->kobj,
2072                                           it87_attributes_fan_beep[i]);
2073                 if (i < 3 && !has_16bit_fans(data))
2074                         sysfs_remove_file(&dev->kobj,
2075                                           it87_attributes_fan_div[i]);
2076         }
2077         for (i = 0; i < 3; i++) {
2078                 if (sio_data->skip_pwm & (1 << 0))
2079                         continue;
2080                 sysfs_remove_group(&dev->kobj, &it87_group_pwm[i]);
2081                 if (has_old_autopwm(data))
2082                         sysfs_remove_group(&dev->kobj,
2083                                            &it87_group_autopwm[i]);
2084         }
2085         if (!sio_data->skip_vid)
2086                 sysfs_remove_group(&dev->kobj, &it87_group_vid);
2087         sysfs_remove_group(&dev->kobj, &it87_group_label);
2088 }
2089
2090 static int it87_probe(struct platform_device *pdev)
2091 {
2092         struct it87_data *data;
2093         struct resource *res;
2094         struct device *dev = &pdev->dev;
2095         struct it87_sio_data *sio_data = dev_get_platdata(dev);
2096         int err = 0, i;
2097         int enable_pwm_interface;
2098         int fan_beep_need_rw;
2099
2100         res = platform_get_resource(pdev, IORESOURCE_IO, 0);
2101         if (!devm_request_region(&pdev->dev, res->start, IT87_EC_EXTENT,
2102                                  DRVNAME)) {
2103                 dev_err(dev, "Failed to request region 0x%lx-0x%lx\n",
2104                         (unsigned long)res->start,
2105                         (unsigned long)(res->start + IT87_EC_EXTENT - 1));
2106                 return -EBUSY;
2107         }
2108
2109         data = devm_kzalloc(&pdev->dev, sizeof(struct it87_data), GFP_KERNEL);
2110         if (!data)
2111                 return -ENOMEM;
2112
2113         data->addr = res->start;
2114         data->type = sio_data->type;
2115         data->features = it87_devices[sio_data->type].features;
2116         data->peci_mask = it87_devices[sio_data->type].peci_mask;
2117         data->old_peci_mask = it87_devices[sio_data->type].old_peci_mask;
2118         data->name = it87_devices[sio_data->type].name;
2119         /*
2120          * IT8705F Datasheet 0.4.1, 3h == Version G.
2121          * IT8712F Datasheet 0.9.1, section 8.3.5 indicates 8h == Version J.
2122          * These are the first revisions with 16-bit tachometer support.
2123          */
2124         switch (data->type) {
2125         case it87:
2126                 if (sio_data->revision >= 0x03) {
2127                         data->features &= ~FEAT_OLD_AUTOPWM;
2128                         data->features |= FEAT_16BIT_FANS;
2129                 }
2130                 break;
2131         case it8712:
2132                 if (sio_data->revision >= 0x08) {
2133                         data->features &= ~FEAT_OLD_AUTOPWM;
2134                         data->features |= FEAT_16BIT_FANS | FEAT_FIVE_FANS;
2135                 }
2136                 break;
2137         default:
2138                 break;
2139         }
2140
2141         /* Now, we do the remaining detection. */
2142         if ((it87_read_value(data, IT87_REG_CONFIG) & 0x80)
2143          || it87_read_value(data, IT87_REG_CHIPID) != 0x90)
2144                 return -ENODEV;
2145
2146         platform_set_drvdata(pdev, data);
2147
2148         mutex_init(&data->update_lock);
2149
2150         /* Check PWM configuration */
2151         enable_pwm_interface = it87_check_pwm(dev);
2152
2153         /* Starting with IT8721F, we handle scaling of internal voltages */
2154         if (has_12mv_adc(data)) {
2155                 if (sio_data->internal & (1 << 0))
2156                         data->in_scaled |= (1 << 3);    /* in3 is AVCC */
2157                 if (sio_data->internal & (1 << 1))
2158                         data->in_scaled |= (1 << 7);    /* in7 is VSB */
2159                 if (sio_data->internal & (1 << 2))
2160                         data->in_scaled |= (1 << 8);    /* in8 is Vbat */
2161                 if (sio_data->internal & (1 << 3))
2162                         data->in_scaled |= (1 << 9);    /* in9 is AVCC */
2163         } else if (sio_data->type == it8781 || sio_data->type == it8782 ||
2164                    sio_data->type == it8783) {
2165                 if (sio_data->internal & (1 << 0))
2166                         data->in_scaled |= (1 << 3);    /* in3 is VCC5V */
2167                 if (sio_data->internal & (1 << 1))
2168                         data->in_scaled |= (1 << 7);    /* in7 is VCCH5V */
2169         }
2170
2171         data->has_temp = 0x07;
2172         if (sio_data->skip_temp & (1 << 2)) {
2173                 if (sio_data->type == it8782
2174                     && !(it87_read_value(data, IT87_REG_TEMP_EXTRA) & 0x80))
2175                         data->has_temp &= ~(1 << 2);
2176         }
2177
2178         /* Initialize the IT87 chip */
2179         it87_init_device(pdev);
2180
2181         /* Register sysfs hooks */
2182         err = sysfs_create_group(&dev->kobj, &it87_group);
2183         if (err)
2184                 return err;
2185
2186         for (i = 0; i < 10; i++) {
2187                 if (sio_data->skip_in & (1 << i))
2188                         continue;
2189                 err = sysfs_create_group(&dev->kobj, &it87_group_in[i]);
2190                 if (err)
2191                         goto error;
2192                 if (sio_data->beep_pin && it87_attributes_in_beep[i]) {
2193                         err = sysfs_create_file(&dev->kobj,
2194                                                 it87_attributes_in_beep[i]);
2195                         if (err)
2196                                 goto error;
2197                 }
2198         }
2199
2200         for (i = 0; i < 3; i++) {
2201                 if (!(data->has_temp & (1 << i)))
2202                         continue;
2203                 err = sysfs_create_group(&dev->kobj, &it87_group_temp[i]);
2204                 if (err)
2205                         goto error;
2206                 if (has_temp_offset(data)) {
2207                         err = sysfs_create_file(&dev->kobj,
2208                                                 it87_attributes_temp_offset[i]);
2209                         if (err)
2210                                 goto error;
2211                 }
2212                 if (sio_data->beep_pin) {
2213                         err = sysfs_create_file(&dev->kobj,
2214                                                 it87_attributes_temp_beep[i]);
2215                         if (err)
2216                                 goto error;
2217                 }
2218         }
2219
2220         /* Do not create fan files for disabled fans */
2221         fan_beep_need_rw = 1;
2222         for (i = 0; i < 5; i++) {
2223                 if (!(data->has_fan & (1 << i)))
2224                         continue;
2225                 err = sysfs_create_group(&dev->kobj, &it87_group_fan[i]);
2226                 if (err)
2227                         goto error;
2228
2229                 if (i < 3 && !has_16bit_fans(data)) {
2230                         err = sysfs_create_file(&dev->kobj,
2231                                                 it87_attributes_fan_div[i]);
2232                         if (err)
2233                                 goto error;
2234                 }
2235
2236                 if (sio_data->beep_pin) {
2237                         err = sysfs_create_file(&dev->kobj,
2238                                                 it87_attributes_fan_beep[i]);
2239                         if (err)
2240                                 goto error;
2241                         if (!fan_beep_need_rw)
2242                                 continue;
2243
2244                         /*
2245                          * As we have a single beep enable bit for all fans,
2246                          * only the first enabled fan has a writable attribute
2247                          * for it.
2248                          */
2249                         if (sysfs_chmod_file(&dev->kobj,
2250                                              it87_attributes_fan_beep[i],
2251                                              S_IRUGO | S_IWUSR))
2252                                 dev_dbg(dev, "chmod +w fan%d_beep failed\n",
2253                                         i + 1);
2254                         fan_beep_need_rw = 0;
2255                 }
2256         }
2257
2258         if (enable_pwm_interface) {
2259                 for (i = 0; i < 3; i++) {
2260                         if (sio_data->skip_pwm & (1 << i))
2261                                 continue;
2262                         err = sysfs_create_group(&dev->kobj,
2263                                                  &it87_group_pwm[i]);
2264                         if (err)
2265                                 goto error;
2266
2267                         if (!has_old_autopwm(data))
2268                                 continue;
2269                         err = sysfs_create_group(&dev->kobj,
2270                                                  &it87_group_autopwm[i]);
2271                         if (err)
2272                                 goto error;
2273                 }
2274         }
2275
2276         if (!sio_data->skip_vid) {
2277                 data->vrm = vid_which_vrm();
2278                 /* VID reading from Super-I/O config space if available */
2279                 data->vid = sio_data->vid_value;
2280                 err = sysfs_create_group(&dev->kobj, &it87_group_vid);
2281                 if (err)
2282                         goto error;
2283         }
2284
2285         /* Export labels for internal sensors */
2286         for (i = 0; i < 4; i++) {
2287                 if (!(sio_data->internal & (1 << i)))
2288                         continue;
2289                 err = sysfs_create_file(&dev->kobj,
2290                                         it87_attributes_label[i]);
2291                 if (err)
2292                         goto error;
2293         }
2294
2295         data->hwmon_dev = hwmon_device_register(dev);
2296         if (IS_ERR(data->hwmon_dev)) {
2297                 err = PTR_ERR(data->hwmon_dev);
2298                 goto error;
2299         }
2300
2301         return 0;
2302
2303 error:
2304         it87_remove_files(dev);
2305         return err;
2306 }
2307
2308 static int it87_remove(struct platform_device *pdev)
2309 {
2310         struct it87_data *data = platform_get_drvdata(pdev);
2311
2312         hwmon_device_unregister(data->hwmon_dev);
2313         it87_remove_files(&pdev->dev);
2314
2315         return 0;
2316 }
2317
2318 /*
2319  * Must be called with data->update_lock held, except during initialization.
2320  * We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
2321  * would slow down the IT87 access and should not be necessary.
2322  */
2323 static int it87_read_value(struct it87_data *data, u8 reg)
2324 {
2325         outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
2326         return inb_p(data->addr + IT87_DATA_REG_OFFSET);
2327 }
2328
2329 /*
2330  * Must be called with data->update_lock held, except during initialization.
2331  * We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
2332  * would slow down the IT87 access and should not be necessary.
2333  */
2334 static void it87_write_value(struct it87_data *data, u8 reg, u8 value)
2335 {
2336         outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
2337         outb_p(value, data->addr + IT87_DATA_REG_OFFSET);
2338 }
2339
2340 /* Return 1 if and only if the PWM interface is safe to use */
2341 static int it87_check_pwm(struct device *dev)
2342 {
2343         struct it87_data *data = dev_get_drvdata(dev);
2344         /*
2345          * Some BIOSes fail to correctly configure the IT87 fans. All fans off
2346          * and polarity set to active low is sign that this is the case so we
2347          * disable pwm control to protect the user.
2348          */
2349         int tmp = it87_read_value(data, IT87_REG_FAN_CTL);
2350         if ((tmp & 0x87) == 0) {
2351                 if (fix_pwm_polarity) {
2352                         /*
2353                          * The user asks us to attempt a chip reconfiguration.
2354                          * This means switching to active high polarity and
2355                          * inverting all fan speed values.
2356                          */
2357                         int i;
2358                         u8 pwm[3];
2359
2360                         for (i = 0; i < 3; i++)
2361                                 pwm[i] = it87_read_value(data,
2362                                                          IT87_REG_PWM(i));
2363
2364                         /*
2365                          * If any fan is in automatic pwm mode, the polarity
2366                          * might be correct, as suspicious as it seems, so we
2367                          * better don't change anything (but still disable the
2368                          * PWM interface).
2369                          */
2370                         if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) {
2371                                 dev_info(dev,
2372                                          "Reconfiguring PWM to active high polarity\n");
2373                                 it87_write_value(data, IT87_REG_FAN_CTL,
2374                                                  tmp | 0x87);
2375                                 for (i = 0; i < 3; i++)
2376                                         it87_write_value(data,
2377                                                          IT87_REG_PWM(i),
2378                                                          0x7f & ~pwm[i]);
2379                                 return 1;
2380                         }
2381
2382                         dev_info(dev,
2383                                  "PWM configuration is too broken to be fixed\n");
2384                 }
2385
2386                 dev_info(dev,
2387                          "Detected broken BIOS defaults, disabling PWM interface\n");
2388                 return 0;
2389         } else if (fix_pwm_polarity) {
2390                 dev_info(dev,
2391                          "PWM configuration looks sane, won't touch\n");
2392         }
2393
2394         return 1;
2395 }
2396
2397 /* Called when we have found a new IT87. */
2398 static void it87_init_device(struct platform_device *pdev)
2399 {
2400         struct it87_sio_data *sio_data = dev_get_platdata(&pdev->dev);
2401         struct it87_data *data = platform_get_drvdata(pdev);
2402         int tmp, i;
2403         u8 mask;
2404
2405         /*
2406          * For each PWM channel:
2407          * - If it is in automatic mode, setting to manual mode should set
2408          *   the fan to full speed by default.
2409          * - If it is in manual mode, we need a mapping to temperature
2410          *   channels to use when later setting to automatic mode later.
2411          *   Use a 1:1 mapping by default (we are clueless.)
2412          * In both cases, the value can (and should) be changed by the user
2413          * prior to switching to a different mode.
2414          * Note that this is no longer needed for the IT8721F and later, as
2415          * these have separate registers for the temperature mapping and the
2416          * manual duty cycle.
2417          */
2418         for (i = 0; i < 3; i++) {
2419                 data->pwm_temp_map[i] = i;
2420                 data->pwm_duty[i] = 0x7f;       /* Full speed */
2421                 data->auto_pwm[i][3] = 0x7f;    /* Full speed, hard-coded */
2422         }
2423
2424         /*
2425          * Some chips seem to have default value 0xff for all limit
2426          * registers. For low voltage limits it makes no sense and triggers
2427          * alarms, so change to 0 instead. For high temperature limits, it
2428          * means -1 degree C, which surprisingly doesn't trigger an alarm,
2429          * but is still confusing, so change to 127 degrees C.
2430          */
2431         for (i = 0; i < 8; i++) {
2432                 tmp = it87_read_value(data, IT87_REG_VIN_MIN(i));
2433                 if (tmp == 0xff)
2434                         it87_write_value(data, IT87_REG_VIN_MIN(i), 0);
2435         }
2436         for (i = 0; i < 3; i++) {
2437                 tmp = it87_read_value(data, IT87_REG_TEMP_HIGH(i));
2438                 if (tmp == 0xff)
2439                         it87_write_value(data, IT87_REG_TEMP_HIGH(i), 127);
2440         }
2441
2442         /*
2443          * Temperature channels are not forcibly enabled, as they can be
2444          * set to two different sensor types and we can't guess which one
2445          * is correct for a given system. These channels can be enabled at
2446          * run-time through the temp{1-3}_type sysfs accessors if needed.
2447          */
2448
2449         /* Check if voltage monitors are reset manually or by some reason */
2450         tmp = it87_read_value(data, IT87_REG_VIN_ENABLE);
2451         if ((tmp & 0xff) == 0) {
2452                 /* Enable all voltage monitors */
2453                 it87_write_value(data, IT87_REG_VIN_ENABLE, 0xff);
2454         }
2455
2456         /* Check if tachometers are reset manually or by some reason */
2457         mask = 0x70 & ~(sio_data->skip_fan << 4);
2458         data->fan_main_ctrl = it87_read_value(data, IT87_REG_FAN_MAIN_CTRL);
2459         if ((data->fan_main_ctrl & mask) == 0) {
2460                 /* Enable all fan tachometers */
2461                 data->fan_main_ctrl |= mask;
2462                 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
2463                                  data->fan_main_ctrl);
2464         }
2465         data->has_fan = (data->fan_main_ctrl >> 4) & 0x07;
2466
2467         /* Set tachometers to 16-bit mode if needed. */
2468         if (has_fan16_config(data)) {
2469                 tmp = it87_read_value(data, IT87_REG_FAN_16BIT);
2470                 if (~tmp & 0x07 & data->has_fan) {
2471                         dev_dbg(&pdev->dev,
2472                                 "Setting fan1-3 to 16-bit mode\n");
2473                         it87_write_value(data, IT87_REG_FAN_16BIT,
2474                                          tmp | 0x07);
2475                 }
2476         }
2477
2478         /* Check for additional fans */
2479         if (has_five_fans(data)) {
2480                 tmp = it87_read_value(data, IT87_REG_FAN_16BIT);
2481                 if (tmp & (1 << 4))
2482                         data->has_fan |= (1 << 3); /* fan4 enabled */
2483                 if (tmp & (1 << 5))
2484                         data->has_fan |= (1 << 4); /* fan5 enabled */
2485         }
2486
2487         /* Fan input pins may be used for alternative functions */
2488         data->has_fan &= ~sio_data->skip_fan;
2489
2490         /* Start monitoring */
2491         it87_write_value(data, IT87_REG_CONFIG,
2492                          (it87_read_value(data, IT87_REG_CONFIG) & 0x3e)
2493                          | (update_vbat ? 0x41 : 0x01));
2494 }
2495
2496 static void it87_update_pwm_ctrl(struct it87_data *data, int nr)
2497 {
2498         data->pwm_ctrl[nr] = it87_read_value(data, IT87_REG_PWM(nr));
2499         if (has_newer_autopwm(data)) {
2500                 data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
2501                 data->pwm_duty[nr] = it87_read_value(data,
2502                                                      IT87_REG_PWM_DUTY(nr));
2503         } else {
2504                 if (data->pwm_ctrl[nr] & 0x80)  /* Automatic mode */
2505                         data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
2506                 else                            /* Manual mode */
2507                         data->pwm_duty[nr] = data->pwm_ctrl[nr] & 0x7f;
2508         }
2509
2510         if (has_old_autopwm(data)) {
2511                 int i;
2512
2513                 for (i = 0; i < 5 ; i++)
2514                         data->auto_temp[nr][i] = it87_read_value(data,
2515                                                 IT87_REG_AUTO_TEMP(nr, i));
2516                 for (i = 0; i < 3 ; i++)
2517                         data->auto_pwm[nr][i] = it87_read_value(data,
2518                                                 IT87_REG_AUTO_PWM(nr, i));
2519         }
2520 }
2521
2522 static struct it87_data *it87_update_device(struct device *dev)
2523 {
2524         struct it87_data *data = dev_get_drvdata(dev);
2525         int i;
2526
2527         mutex_lock(&data->update_lock);
2528
2529         if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
2530             || !data->valid) {
2531                 if (update_vbat) {
2532                         /*
2533                          * Cleared after each update, so reenable.  Value
2534                          * returned by this read will be previous value
2535                          */
2536                         it87_write_value(data, IT87_REG_CONFIG,
2537                                 it87_read_value(data, IT87_REG_CONFIG) | 0x40);
2538                 }
2539                 for (i = 0; i <= 7; i++) {
2540                         data->in[i][0] =
2541                                 it87_read_value(data, IT87_REG_VIN(i));
2542                         data->in[i][1] =
2543                                 it87_read_value(data, IT87_REG_VIN_MIN(i));
2544                         data->in[i][2] =
2545                                 it87_read_value(data, IT87_REG_VIN_MAX(i));
2546                 }
2547                 /* in8 (battery) has no limit registers */
2548                 data->in[8][0] = it87_read_value(data, IT87_REG_VIN(8));
2549                 if (data->type == it8603)
2550                         data->in[9][0] = it87_read_value(data, 0x2f);
2551
2552                 for (i = 0; i < 5; i++) {
2553                         /* Skip disabled fans */
2554                         if (!(data->has_fan & (1 << i)))
2555                                 continue;
2556
2557                         data->fan[i][1] =
2558                                 it87_read_value(data, IT87_REG_FAN_MIN[i]);
2559                         data->fan[i][0] = it87_read_value(data,
2560                                        IT87_REG_FAN[i]);
2561                         /* Add high byte if in 16-bit mode */
2562                         if (has_16bit_fans(data)) {
2563                                 data->fan[i][0] |= it87_read_value(data,
2564                                                 IT87_REG_FANX[i]) << 8;
2565                                 data->fan[i][1] |= it87_read_value(data,
2566                                                 IT87_REG_FANX_MIN[i]) << 8;
2567                         }
2568                 }
2569                 for (i = 0; i < 3; i++) {
2570                         if (!(data->has_temp & (1 << i)))
2571                                 continue;
2572                         data->temp[i][0] =
2573                                 it87_read_value(data, IT87_REG_TEMP(i));
2574                         data->temp[i][1] =
2575                                 it87_read_value(data, IT87_REG_TEMP_LOW(i));
2576                         data->temp[i][2] =
2577                                 it87_read_value(data, IT87_REG_TEMP_HIGH(i));
2578                         if (has_temp_offset(data))
2579                                 data->temp[i][3] =
2580                                   it87_read_value(data,
2581                                                   IT87_REG_TEMP_OFFSET[i]);
2582                 }
2583
2584                 /* Newer chips don't have clock dividers */
2585                 if ((data->has_fan & 0x07) && !has_16bit_fans(data)) {
2586                         i = it87_read_value(data, IT87_REG_FAN_DIV);
2587                         data->fan_div[0] = i & 0x07;
2588                         data->fan_div[1] = (i >> 3) & 0x07;
2589                         data->fan_div[2] = (i & 0x40) ? 3 : 1;
2590                 }
2591
2592                 data->alarms =
2593                         it87_read_value(data, IT87_REG_ALARM1) |
2594                         (it87_read_value(data, IT87_REG_ALARM2) << 8) |
2595                         (it87_read_value(data, IT87_REG_ALARM3) << 16);
2596                 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
2597
2598                 data->fan_main_ctrl = it87_read_value(data,
2599                                 IT87_REG_FAN_MAIN_CTRL);
2600                 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL);
2601                 for (i = 0; i < 3; i++)
2602                         it87_update_pwm_ctrl(data, i);
2603
2604                 data->sensor = it87_read_value(data, IT87_REG_TEMP_ENABLE);
2605                 data->extra = it87_read_value(data, IT87_REG_TEMP_EXTRA);
2606                 /*
2607                  * The IT8705F does not have VID capability.
2608                  * The IT8718F and later don't use IT87_REG_VID for the
2609                  * same purpose.
2610                  */
2611                 if (data->type == it8712 || data->type == it8716) {
2612                         data->vid = it87_read_value(data, IT87_REG_VID);
2613                         /*
2614                          * The older IT8712F revisions had only 5 VID pins,
2615                          * but we assume it is always safe to read 6 bits.
2616                          */
2617                         data->vid &= 0x3f;
2618                 }
2619                 data->last_updated = jiffies;
2620                 data->valid = 1;
2621         }
2622
2623         mutex_unlock(&data->update_lock);
2624
2625         return data;
2626 }
2627
2628 static int __init it87_device_add(unsigned short address,
2629                                   const struct it87_sio_data *sio_data)
2630 {
2631         struct resource res = {
2632                 .start  = address + IT87_EC_OFFSET,
2633                 .end    = address + IT87_EC_OFFSET + IT87_EC_EXTENT - 1,
2634                 .name   = DRVNAME,
2635                 .flags  = IORESOURCE_IO,
2636         };
2637         int err;
2638
2639         err = acpi_check_resource_conflict(&res);
2640         if (err)
2641                 goto exit;
2642
2643         pdev = platform_device_alloc(DRVNAME, address);
2644         if (!pdev) {
2645                 err = -ENOMEM;
2646                 pr_err("Device allocation failed\n");
2647                 goto exit;
2648         }
2649
2650         err = platform_device_add_resources(pdev, &res, 1);
2651         if (err) {
2652                 pr_err("Device resource addition failed (%d)\n", err);
2653                 goto exit_device_put;
2654         }
2655
2656         err = platform_device_add_data(pdev, sio_data,
2657                                        sizeof(struct it87_sio_data));
2658         if (err) {
2659                 pr_err("Platform data allocation failed\n");
2660                 goto exit_device_put;
2661         }
2662
2663         err = platform_device_add(pdev);
2664         if (err) {
2665                 pr_err("Device addition failed (%d)\n", err);
2666                 goto exit_device_put;
2667         }
2668
2669         return 0;
2670
2671 exit_device_put:
2672         platform_device_put(pdev);
2673 exit:
2674         return err;
2675 }
2676
2677 static int __init sm_it87_init(void)
2678 {
2679         int err;
2680         unsigned short isa_address = 0;
2681         struct it87_sio_data sio_data;
2682
2683         memset(&sio_data, 0, sizeof(struct it87_sio_data));
2684         err = it87_find(&isa_address, &sio_data);
2685         if (err)
2686                 return err;
2687         err = platform_driver_register(&it87_driver);
2688         if (err)
2689                 return err;
2690
2691         err = it87_device_add(isa_address, &sio_data);
2692         if (err) {
2693                 platform_driver_unregister(&it87_driver);
2694                 return err;
2695         }
2696
2697         return 0;
2698 }
2699
2700 static void __exit sm_it87_exit(void)
2701 {
2702         platform_device_unregister(pdev);
2703         platform_driver_unregister(&it87_driver);
2704 }
2705
2706
2707 MODULE_AUTHOR("Chris Gauthron, Jean Delvare <jdelvare@suse.de>");
2708 MODULE_DESCRIPTION("IT8705F/IT871xF/IT872xF hardware monitoring driver");
2709 module_param(update_vbat, bool, 0);
2710 MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value");
2711 module_param(fix_pwm_polarity, bool, 0);
2712 MODULE_PARM_DESC(fix_pwm_polarity,
2713                  "Force PWM polarity to active high (DANGEROUS)");
2714 MODULE_LICENSE("GPL");
2715
2716 module_init(sm_it87_init);
2717 module_exit(sm_it87_exit);