drivers/hwmon/w83795.c

   1 /*
   2  *  w83795.c - Linux kernel driver for hardware monitoring
   3  *  Copyright (C) 2008 Nuvoton Technology Corp.
   4  *                Wei Song
   5  *  Copyright (C) 2010 Jean Delvare <khali@linux-fr.org>
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation - version 2.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19  *  02110-1301 USA.
  20  *
  21  *  Supports following chips:
  22  *
  23  *  Chip       #vin   #fanin #pwm #temp #dts wchipid  vendid  i2c  ISA
  24  *  w83795g     21     14     8     6     8    0x79   0x5ca3  yes   no
  25  *  w83795adg   18     14     2     6     8    0x79   0x5ca3  yes   no
  26  */
  27
  28 #include <linux/kernel.h>
  29 #include <linux/module.h>
  30 #include <linux/init.h>
  31 #include <linux/slab.h>
  32 #include <linux/i2c.h>
  33 #include <linux/hwmon.h>
  34 #include <linux/hwmon-sysfs.h>
  35 #include <linux/err.h>
  36 #include <linux/mutex.h>
  37 #include <linux/delay.h>
  38
  39 /* Addresses to scan */
  40 static const unsigned short normal_i2c[] = {
  41         0x2c, 0x2d, 0x2e, 0x2f, I2C_CLIENT_END
  42 };
  43
  44
  45 static bool reset;
  46 module_param(reset, bool, 0);
  47 MODULE_PARM_DESC(reset, "Set to 1 to reset chip, not recommended");
  48
  49
  50 #define W83795_REG_BANKSEL              0x00
  51 #define W83795_REG_VENDORID             0xfd
  52 #define W83795_REG_CHIPID               0xfe
  53 #define W83795_REG_DEVICEID             0xfb
  54 #define W83795_REG_DEVICEID_A           0xff
  55
  56 #define W83795_REG_I2C_ADDR             0xfc
  57 #define W83795_REG_CONFIG               0x01
  58 #define W83795_REG_CONFIG_CONFIG48      0x04
  59 #define W83795_REG_CONFIG_START 0x01
  60
  61 /* Multi-Function Pin Ctrl Registers */
  62 #define W83795_REG_VOLT_CTRL1           0x02
  63 #define W83795_REG_VOLT_CTRL2           0x03
  64 #define W83795_REG_TEMP_CTRL1           0x04
  65 #define W83795_REG_TEMP_CTRL2           0x05
  66 #define W83795_REG_FANIN_CTRL1          0x06
  67 #define W83795_REG_FANIN_CTRL2          0x07
  68 #define W83795_REG_VMIGB_CTRL           0x08
  69
  70 #define TEMP_READ                       0
  71 #define TEMP_CRIT                       1
  72 #define TEMP_CRIT_HYST                  2
  73 #define TEMP_WARN                       3
  74 #define TEMP_WARN_HYST                  4
  75 /*
  76  * only crit and crit_hyst affect real-time alarm status
  77  * current crit crit_hyst warn warn_hyst
  78  */
  79 static const u16 W83795_REG_TEMP[][5] = {
  80         {0x21, 0x96, 0x97, 0x98, 0x99}, /* TD1/TR1 */
  81         {0x22, 0x9a, 0x9b, 0x9c, 0x9d}, /* TD2/TR2 */
  82         {0x23, 0x9e, 0x9f, 0xa0, 0xa1}, /* TD3/TR3 */
  83         {0x24, 0xa2, 0xa3, 0xa4, 0xa5}, /* TD4/TR4 */
  84         {0x1f, 0xa6, 0xa7, 0xa8, 0xa9}, /* TR5 */
  85         {0x20, 0xaa, 0xab, 0xac, 0xad}, /* TR6 */
  86 };
  87
  88 #define IN_READ                         0
  89 #define IN_MAX                          1
  90 #define IN_LOW                          2
  91 static const u16 W83795_REG_IN[][3] = {
  92         /* Current, HL, LL */
  93         {0x10, 0x70, 0x71},     /* VSEN1 */
  94         {0x11, 0x72, 0x73},     /* VSEN2 */
  95         {0x12, 0x74, 0x75},     /* VSEN3 */
  96         {0x13, 0x76, 0x77},     /* VSEN4 */
  97         {0x14, 0x78, 0x79},     /* VSEN5 */
  98         {0x15, 0x7a, 0x7b},     /* VSEN6 */
  99         {0x16, 0x7c, 0x7d},     /* VSEN7 */
 100         {0x17, 0x7e, 0x7f},     /* VSEN8 */
 101         {0x18, 0x80, 0x81},     /* VSEN9 */
 102         {0x19, 0x82, 0x83},     /* VSEN10 */
 103         {0x1A, 0x84, 0x85},     /* VSEN11 */
 104         {0x1B, 0x86, 0x87},     /* VTT */
 105         {0x1C, 0x88, 0x89},     /* 3VDD */
 106         {0x1D, 0x8a, 0x8b},     /* 3VSB */
 107         {0x1E, 0x8c, 0x8d},     /* VBAT */
 108         {0x1F, 0xa6, 0xa7},     /* VSEN12 */
 109         {0x20, 0xaa, 0xab},     /* VSEN13 */
 110         {0x21, 0x96, 0x97},     /* VSEN14 */
 111         {0x22, 0x9a, 0x9b},     /* VSEN15 */
 112         {0x23, 0x9e, 0x9f},     /* VSEN16 */
 113         {0x24, 0xa2, 0xa3},     /* VSEN17 */
 114 };
 115 #define W83795_REG_VRLSB                0x3C
 116
 117 static const u8 W83795_REG_IN_HL_LSB[] = {
 118         0x8e,   /* VSEN1-4 */
 119         0x90,   /* VSEN5-8 */
 120         0x92,   /* VSEN9-11 */
 121         0x94,   /* VTT, 3VDD, 3VSB, 3VBAT */
 122         0xa8,   /* VSEN12 */
 123         0xac,   /* VSEN13 */
 124         0x98,   /* VSEN14 */
 125         0x9c,   /* VSEN15 */
 126         0xa0,   /* VSEN16 */
 127         0xa4,   /* VSEN17 */
 128 };
 129
 130 #define IN_LSB_REG(index, type) \
 131         (((type) == 1) ? W83795_REG_IN_HL_LSB[(index)] \
 132         : (W83795_REG_IN_HL_LSB[(index)] + 1))
 133
 134 #define IN_LSB_SHIFT                    0
 135 #define IN_LSB_IDX                      1
 136 static const u8 IN_LSB_SHIFT_IDX[][2] = {
 137         /* High/Low LSB shift, LSB No. */
 138         {0x00, 0x00},   /* VSEN1 */
 139         {0x02, 0x00},   /* VSEN2 */
 140         {0x04, 0x00},   /* VSEN3 */
 141         {0x06, 0x00},   /* VSEN4 */
 142         {0x00, 0x01},   /* VSEN5 */
 143         {0x02, 0x01},   /* VSEN6 */
 144         {0x04, 0x01},   /* VSEN7 */
 145         {0x06, 0x01},   /* VSEN8 */
 146         {0x00, 0x02},   /* VSEN9 */
 147         {0x02, 0x02},   /* VSEN10 */
 148         {0x04, 0x02},   /* VSEN11 */
 149         {0x00, 0x03},   /* VTT */
 150         {0x02, 0x03},   /* 3VDD */
 151         {0x04, 0x03},   /* 3VSB */
 152         {0x06, 0x03},   /* VBAT */
 153         {0x06, 0x04},   /* VSEN12 */
 154         {0x06, 0x05},   /* VSEN13 */
 155         {0x06, 0x06},   /* VSEN14 */
 156         {0x06, 0x07},   /* VSEN15 */
 157         {0x06, 0x08},   /* VSEN16 */
 158         {0x06, 0x09},   /* VSEN17 */
 159 };
 160
 161
 162 #define W83795_REG_FAN(index)           (0x2E + (index))
 163 #define W83795_REG_FAN_MIN_HL(index)    (0xB6 + (index))
 164 #define W83795_REG_FAN_MIN_LSB(index)   (0xC4 + (index) / 2)
 165 #define W83795_REG_FAN_MIN_LSB_SHIFT(index) \
 166         (((index) & 1) ? 4 : 0)
 167
 168 #define W83795_REG_VID_CTRL             0x6A
 169
 170 #define W83795_REG_ALARM_CTRL           0x40
 171 #define ALARM_CTRL_RTSACS               (1 << 7)
 172 #define W83795_REG_ALARM(index)         (0x41 + (index))
 173 #define W83795_REG_CLR_CHASSIS          0x4D
 174 #define W83795_REG_BEEP(index)          (0x50 + (index))
 175
 176 #define W83795_REG_OVT_CFG              0x58
 177 #define OVT_CFG_SEL                     (1 << 7)
 178
 179
 180 #define W83795_REG_FCMS1                0x201
 181 #define W83795_REG_FCMS2                0x208
 182 #define W83795_REG_TFMR(index)          (0x202 + (index))
 183 #define W83795_REG_FOMC                 0x20F
 184
 185 #define W83795_REG_TSS(index)           (0x209 + (index))
 186
 187 #define TSS_MAP_RESERVED                0xff
 188 static const u8 tss_map[4][6] = {
 189         { 0,  1,  2,  3,  4,  5},
 190         { 6,  7,  8,  9,  0,  1},
 191         {10, 11, 12, 13,  2,  3},
 192         { 4,  5,  4,  5, TSS_MAP_RESERVED, TSS_MAP_RESERVED},
 193 };
 194
 195 #define PWM_OUTPUT                      0
 196 #define PWM_FREQ                        1
 197 #define PWM_START                       2
 198 #define PWM_NONSTOP                     3
 199 #define PWM_STOP_TIME                   4
 200 #define W83795_REG_PWM(index, nr)       (0x210 + (nr) * 8 + (index))
 201
 202 #define W83795_REG_FTSH(index)          (0x240 + (index) * 2)
 203 #define W83795_REG_FTSL(index)          (0x241 + (index) * 2)
 204 #define W83795_REG_TFTS                 0x250
 205
 206 #define TEMP_PWM_TTTI                   0
 207 #define TEMP_PWM_CTFS                   1
 208 #define TEMP_PWM_HCT                    2
 209 #define TEMP_PWM_HOT                    3
 210 #define W83795_REG_TTTI(index)          (0x260 + (index))
 211 #define W83795_REG_CTFS(index)          (0x268 + (index))
 212 #define W83795_REG_HT(index)            (0x270 + (index))
 213
 214 #define SF4_TEMP                        0
 215 #define SF4_PWM                         1
 216 #define W83795_REG_SF4_TEMP(temp_num, index) \
 217         (0x280 + 0x10 * (temp_num) + (index))
 218 #define W83795_REG_SF4_PWM(temp_num, index) \
 219         (0x288 + 0x10 * (temp_num) + (index))
 220
 221 #define W83795_REG_DTSC                 0x301
 222 #define W83795_REG_DTSE                 0x302
 223 #define W83795_REG_DTS(index)           (0x26 + (index))
 224 #define W83795_REG_PECI_TBASE(index)    (0x320 + (index))
 225
 226 #define DTS_CRIT                        0
 227 #define DTS_CRIT_HYST                   1
 228 #define DTS_WARN                        2
 229 #define DTS_WARN_HYST                   3
 230 #define W83795_REG_DTS_EXT(index)       (0xB2 + (index))
 231
 232 #define SETUP_PWM_DEFAULT               0
 233 #define SETUP_PWM_UPTIME                1
 234 #define SETUP_PWM_DOWNTIME              2
 235 #define W83795_REG_SETUP_PWM(index)    (0x20C + (index))
 236
 237 static inline u16 in_from_reg(u8 index, u16 val)
 238 {
 239         /* 3VDD, 3VSB and VBAT: 6 mV/bit; other inputs: 2 mV/bit */
 240         if (index >= 12 && index <= 14)
 241                 return val * 6;
 242         else
 243                 return val * 2;
 244 }
 245
 246 static inline u16 in_to_reg(u8 index, u16 val)
 247 {
 248         if (index >= 12 && index <= 14)
 249                 return val / 6;
 250         else
 251                 return val / 2;
 252 }
 253
 254 static inline unsigned long fan_from_reg(u16 val)
 255 {
 256         if ((val == 0xfff) || (val == 0))
 257                 return 0;
 258         return 1350000UL / val;
 259 }
 260
 261 static inline u16 fan_to_reg(long rpm)
 262 {
 263         if (rpm <= 0)
 264                 return 0x0fff;
 265         return SENSORS_LIMIT((1350000 + (rpm >> 1)) / rpm, 1, 0xffe);
 266 }
 267
 268 static inline unsigned long time_from_reg(u8 reg)
 269 {
 270         return reg * 100;
 271 }
 272
 273 static inline u8 time_to_reg(unsigned long val)
 274 {
 275         return SENSORS_LIMIT((val + 50) / 100, 0, 0xff);
 276 }
 277
 278 static inline long temp_from_reg(s8 reg)
 279 {
 280         return reg * 1000;
 281 }
 282
 283 static inline s8 temp_to_reg(long val, s8 min, s8 max)
 284 {
 285         return SENSORS_LIMIT(val / 1000, min, max);
 286 }
 287
 288 static const u16 pwm_freq_cksel0[16] = {
 289         1024, 512, 341, 256, 205, 171, 146, 128,
 290         85, 64, 32, 16, 8, 4, 2, 1
 291 };
 292
 293 static unsigned int pwm_freq_from_reg(u8 reg, u16 clkin)
 294 {
 295         unsigned long base_clock;
 296
 297         if (reg & 0x80) {
 298                 base_clock = clkin * 1000 / ((clkin == 48000) ? 384 : 256);
 299                 return base_clock / ((reg & 0x7f) + 1);
 300         } else
 301                 return pwm_freq_cksel0[reg & 0x0f];
 302 }
 303
 304 static u8 pwm_freq_to_reg(unsigned long val, u16 clkin)
 305 {
 306         unsigned long base_clock;
 307         u8 reg0, reg1;
 308         unsigned long best0, best1;
 309
 310         /* Best fit for cksel = 0 */
 311         for (reg0 = 0; reg0 < ARRAY_SIZE(pwm_freq_cksel0) - 1; reg0++) {
 312                 if (val > (pwm_freq_cksel0[reg0] +
 313                            pwm_freq_cksel0[reg0 + 1]) / 2)
 314                         break;
 315         }
 316         if (val < 375)  /* cksel = 1 can't beat this */
 317                 return reg0;
 318         best0 = pwm_freq_cksel0[reg0];
 319
 320         /* Best fit for cksel = 1 */
 321         base_clock = clkin * 1000 / ((clkin == 48000) ? 384 : 256);
 322         reg1 = SENSORS_LIMIT(DIV_ROUND_CLOSEST(base_clock, val), 1, 128);
 323         best1 = base_clock / reg1;
 324         reg1 = 0x80 | (reg1 - 1);
 325
 326         /* Choose the closest one */
 327         if (abs(val - best0) > abs(val - best1))
 328                 return reg1;
 329         else
 330                 return reg0;
 331 }
 332
 333 enum chip_types {w83795g, w83795adg};
 334
 335 struct w83795_data {
 336         struct device *hwmon_dev;
 337         struct mutex update_lock;
 338         unsigned long last_updated;     /* In jiffies */
 339         enum chip_types chip_type;
 340
 341         u8 bank;
 342
 343         u32 has_in;             /* Enable monitor VIN or not */
 344         u8 has_dyn_in;          /* Only in2-0 can have this */
 345         u16 in[21][3];          /* Register value, read/high/low */
 346         u8 in_lsb[10][3];       /* LSB Register value, high/low */
 347         u8 has_gain;            /* has gain: in17-20 * 8 */
 348
 349         u16 has_fan;            /* Enable fan14-1 or not */
 350         u16 fan[14];            /* Register value combine */
 351         u16 fan_min[14];        /* Register value combine */
 352
 353         u8 has_temp;            /* Enable monitor temp6-1 or not */
 354         s8 temp[6][5];          /* current, crit, crit_hyst, warn, warn_hyst */
 355         u8 temp_read_vrlsb[6];
 356         u8 temp_mode;           /* Bit vector, 0 = TR, 1 = TD */
 357         u8 temp_src[3];         /* Register value */
 358
 359         u8 enable_dts;          /*
 360                                  * Enable PECI and SB-TSI,
 361                                  * bit 0: =1 enable, =0 disable,
 362                                  * bit 1: =1 AMD SB-TSI, =0 Intel PECI
 363                                  */
 364         u8 has_dts;             /* Enable monitor DTS temp */
 365         s8 dts[8];              /* Register value */
 366         u8 dts_read_vrlsb[8];   /* Register value */
 367         s8 dts_ext[4];          /* Register value */
 368
 369         u8 has_pwm;             /*
 370                                  * 795g supports 8 pwm, 795adg only supports 2,
 371                                  * no config register, only affected by chip
 372                                  * type
 373                                  */
 374         u8 pwm[8][5];           /*
 375                                  * Register value, output, freq, start,
 376                                  *  non stop, stop time
 377                                  */
 378         u16 clkin;              /* CLKIN frequency in kHz */
 379         u8 pwm_fcms[2];         /* Register value */
 380         u8 pwm_tfmr[6];         /* Register value */
 381         u8 pwm_fomc;            /* Register value */
 382
 383         u16 target_speed[8];    /*
 384                                  * Register value, target speed for speed
 385                                  * cruise
 386                                  */
 387         u8 tol_speed;           /* tolerance of target speed */
 388         u8 pwm_temp[6][4];      /* TTTI, CTFS, HCT, HOT */
 389         u8 sf4_reg[6][2][7];    /* 6 temp, temp/dcpwm, 7 registers */
 390
 391         u8 setup_pwm[3];        /* Register value */
 392
 393         u8 alarms[6];           /* Register value */
 394         u8 enable_beep;
 395         u8 beeps[6];            /* Register value */
 396
 397         char valid;
 398         char valid_limits;
 399         char valid_pwm_config;
 400 };
 401
 402 /*
 403  * Hardware access
 404  * We assume that nobdody can change the bank outside the driver.
 405  */
 406
 407 /* Must be called with data->update_lock held, except during initialization */
 408 static int w83795_set_bank(struct i2c_client *client, u8 bank)
 409 {
 410         struct w83795_data *data = i2c_get_clientdata(client);
 411         int err;
 412
 413         /* If the same bank is already set, nothing to do */
 414         if ((data->bank & 0x07) == bank)
 415                 return 0;
 416
 417         /* Change to new bank, preserve all other bits */
 418         bank |= data->bank & ~0x07;
 419         err = i2c_smbus_write_byte_data(client, W83795_REG_BANKSEL, bank);
 420         if (err < 0) {
 421                 dev_err(&client->dev,
 422                         "Failed to set bank to %d, err %d\n",
 423                         (int)bank, err);
 424                 return err;
 425         }
 426         data->bank = bank;
 427
 428         return 0;
 429 }
 430
 431 /* Must be called with data->update_lock held, except during initialization */
 432 static u8 w83795_read(struct i2c_client *client, u16 reg)
 433 {
 434         int err;
 435
 436         err = w83795_set_bank(client, reg >> 8);
 437         if (err < 0)
 438                 return 0x00;    /* Arbitrary */
 439
 440         err = i2c_smbus_read_byte_data(client, reg & 0xff);
 441         if (err < 0) {
 442                 dev_err(&client->dev,
 443                         "Failed to read from register 0x%03x, err %d\n",
 444                         (int)reg, err);
 445                 return 0x00;    /* Arbitrary */
 446         }
 447         return err;
 448 }
 449
 450 /* Must be called with data->update_lock held, except during initialization */
 451 static int w83795_write(struct i2c_client *client, u16 reg, u8 value)
 452 {
 453         int err;
 454
 455         err = w83795_set_bank(client, reg >> 8);
 456         if (err < 0)
 457                 return err;
 458
 459         err = i2c_smbus_write_byte_data(client, reg & 0xff, value);
 460         if (err < 0)
 461                 dev_err(&client->dev,
 462                         "Failed to write to register 0x%03x, err %d\n",
 463                         (int)reg, err);
 464         return err;
 465 }
 466
 467 static void w83795_update_limits(struct i2c_client *client)
 468 {
 469         struct w83795_data *data = i2c_get_clientdata(client);
 470         int i, limit;
 471         u8 lsb;
 472
 473         /* Read the voltage limits */
 474         for (i = 0; i < ARRAY_SIZE(data->in); i++) {
 475                 if (!(data->has_in & (1 << i)))
 476                         continue;
 477                 data->in[i][IN_MAX] =
 478                         w83795_read(client, W83795_REG_IN[i][IN_MAX]);
 479                 data->in[i][IN_LOW] =
 480                         w83795_read(client, W83795_REG_IN[i][IN_LOW]);
 481         }
 482         for (i = 0; i < ARRAY_SIZE(data->in_lsb); i++) {
 483                 if ((i == 2 && data->chip_type == w83795adg) ||
 484                     (i >= 4 && !(data->has_in & (1 << (i + 11)))))
 485                         continue;
 486                 data->in_lsb[i][IN_MAX] =
 487                         w83795_read(client, IN_LSB_REG(i, IN_MAX));
 488                 data->in_lsb[i][IN_LOW] =
 489                         w83795_read(client, IN_LSB_REG(i, IN_LOW));
 490         }
 491
 492         /* Read the fan limits */
 493         lsb = 0; /* Silent false gcc warning */
 494         for (i = 0; i < ARRAY_SIZE(data->fan); i++) {
 495                 /*
 496                  * Each register contains LSB for 2 fans, but we want to
 497                  * read it only once to save time
 498                  */
 499                 if ((i & 1) == 0 && (data->has_fan & (3 << i)))
 500                         lsb = w83795_read(client, W83795_REG_FAN_MIN_LSB(i));
 501
 502                 if (!(data->has_fan & (1 << i)))
 503                         continue;
 504                 data->fan_min[i] =
 505                         w83795_read(client, W83795_REG_FAN_MIN_HL(i)) << 4;
 506                 data->fan_min[i] |=
 507                         (lsb >> W83795_REG_FAN_MIN_LSB_SHIFT(i)) & 0x0F;
 508         }
 509
 510         /* Read the temperature limits */
 511         for (i = 0; i < ARRAY_SIZE(data->temp); i++) {
 512                 if (!(data->has_temp & (1 << i)))
 513                         continue;
 514                 for (limit = TEMP_CRIT; limit <= TEMP_WARN_HYST; limit++)
 515                         data->temp[i][limit] =
 516                                 w83795_read(client, W83795_REG_TEMP[i][limit]);
 517         }
 518
 519         /* Read the DTS limits */
 520         if (data->enable_dts) {
 521                 for (limit = DTS_CRIT; limit <= DTS_WARN_HYST; limit++)
 522                         data->dts_ext[limit] =
 523                                 w83795_read(client, W83795_REG_DTS_EXT(limit));
 524         }
 525
 526         /* Read beep settings */
 527         if (data->enable_beep) {
 528                 for (i = 0; i < ARRAY_SIZE(data->beeps); i++)
 529                         data->beeps[i] =
 530                                 w83795_read(client, W83795_REG_BEEP(i));
 531         }
 532
 533         data->valid_limits = 1;
 534 }
 535
 536 static struct w83795_data *w83795_update_pwm_config(struct device *dev)
 537 {
 538         struct i2c_client *client = to_i2c_client(dev);
 539         struct w83795_data *data = i2c_get_clientdata(client);
 540         int i, tmp;
 541
 542         mutex_lock(&data->update_lock);
 543
 544         if (data->valid_pwm_config)
 545                 goto END;
 546
 547         /* Read temperature source selection */
 548         for (i = 0; i < ARRAY_SIZE(data->temp_src); i++)
 549                 data->temp_src[i] = w83795_read(client, W83795_REG_TSS(i));
 550
 551         /* Read automatic fan speed control settings */
 552         data->pwm_fcms[0] = w83795_read(client, W83795_REG_FCMS1);
 553         data->pwm_fcms[1] = w83795_read(client, W83795_REG_FCMS2);
 554         for (i = 0; i < ARRAY_SIZE(data->pwm_tfmr); i++)
 555                 data->pwm_tfmr[i] = w83795_read(client, W83795_REG_TFMR(i));
 556         data->pwm_fomc = w83795_read(client, W83795_REG_FOMC);
 557         for (i = 0; i < data->has_pwm; i++) {
 558                 for (tmp = PWM_FREQ; tmp <= PWM_STOP_TIME; tmp++)
 559                         data->pwm[i][tmp] =
 560                                 w83795_read(client, W83795_REG_PWM(i, tmp));
 561         }
 562         for (i = 0; i < ARRAY_SIZE(data->target_speed); i++) {
 563                 data->target_speed[i] =
 564                         w83795_read(client, W83795_REG_FTSH(i)) << 4;
 565                 data->target_speed[i] |=
 566                         w83795_read(client, W83795_REG_FTSL(i)) >> 4;
 567         }
 568         data->tol_speed = w83795_read(client, W83795_REG_TFTS) & 0x3f;
 569
 570         for (i = 0; i < ARRAY_SIZE(data->pwm_temp); i++) {
 571                 data->pwm_temp[i][TEMP_PWM_TTTI] =
 572                         w83795_read(client, W83795_REG_TTTI(i)) & 0x7f;
 573                 data->pwm_temp[i][TEMP_PWM_CTFS] =
 574                         w83795_read(client, W83795_REG_CTFS(i));
 575                 tmp = w83795_read(client, W83795_REG_HT(i));
 576                 data->pwm_temp[i][TEMP_PWM_HCT] = tmp >> 4;
 577                 data->pwm_temp[i][TEMP_PWM_HOT] = tmp & 0x0f;
 578         }
 579
 580         /* Read SmartFanIV trip points */
 581         for (i = 0; i < ARRAY_SIZE(data->sf4_reg); i++) {
 582                 for (tmp = 0; tmp < 7; tmp++) {
 583                         data->sf4_reg[i][SF4_TEMP][tmp] =
 584                                 w83795_read(client,
 585                                             W83795_REG_SF4_TEMP(i, tmp));
 586                         data->sf4_reg[i][SF4_PWM][tmp] =
 587                                 w83795_read(client, W83795_REG_SF4_PWM(i, tmp));
 588                 }
 589         }
 590
 591         /* Read setup PWM */
 592         for (i = 0; i < ARRAY_SIZE(data->setup_pwm); i++)
 593                 data->setup_pwm[i] =
 594                         w83795_read(client, W83795_REG_SETUP_PWM(i));
 595
 596         data->valid_pwm_config = 1;
 597
 598 END:
 599         mutex_unlock(&data->update_lock);
 600         return data;
 601 }
 602
 603 static struct w83795_data *w83795_update_device(struct device *dev)
 604 {
 605         struct i2c_client *client = to_i2c_client(dev);
 606         struct w83795_data *data = i2c_get_clientdata(client);
 607         u16 tmp;
 608         u8 intrusion;
 609         int i;
 610
 611         mutex_lock(&data->update_lock);
 612
 613         if (!data->valid_limits)
 614                 w83795_update_limits(client);
 615
 616         if (!(time_after(jiffies, data->last_updated + HZ * 2)
 617               || !data->valid))
 618                 goto END;
 619
 620         /* Update the voltages value */
 621         for (i = 0; i < ARRAY_SIZE(data->in); i++) {
 622                 if (!(data->has_in & (1 << i)))
 623                         continue;
 624                 tmp = w83795_read(client, W83795_REG_IN[i][IN_READ]) << 2;
 625                 tmp |= w83795_read(client, W83795_REG_VRLSB) >> 6;
 626                 data->in[i][IN_READ] = tmp;
 627         }
 628
 629         /* in0-2 can have dynamic limits (W83795G only) */
 630         if (data->has_dyn_in) {
 631                 u8 lsb_max = w83795_read(client, IN_LSB_REG(0, IN_MAX));
 632                 u8 lsb_low = w83795_read(client, IN_LSB_REG(0, IN_LOW));
 633
 634                 for (i = 0; i < 3; i++) {
 635                         if (!(data->has_dyn_in & (1 << i)))
 636                                 continue;
 637                         data->in[i][IN_MAX] =
 638                                 w83795_read(client, W83795_REG_IN[i][IN_MAX]);
 639                         data->in[i][IN_LOW] =
 640                                 w83795_read(client, W83795_REG_IN[i][IN_LOW]);
 641                         data->in_lsb[i][IN_MAX] = (lsb_max >> (2 * i)) & 0x03;
 642                         data->in_lsb[i][IN_LOW] = (lsb_low >> (2 * i)) & 0x03;
 643                 }
 644         }
 645
 646         /* Update fan */
 647         for (i = 0; i < ARRAY_SIZE(data->fan); i++) {
 648                 if (!(data->has_fan & (1 << i)))
 649                         continue;
 650                 data->fan[i] = w83795_read(client, W83795_REG_FAN(i)) << 4;
 651                 data->fan[i] |= w83795_read(client, W83795_REG_VRLSB) >> 4;
 652         }
 653
 654         /* Update temperature */
 655         for (i = 0; i < ARRAY_SIZE(data->temp); i++) {
 656                 data->temp[i][TEMP_READ] =
 657                         w83795_read(client, W83795_REG_TEMP[i][TEMP_READ]);
 658                 data->temp_read_vrlsb[i] =
 659                         w83795_read(client, W83795_REG_VRLSB);
 660         }
 661
 662         /* Update dts temperature */
 663         if (data->enable_dts) {
 664                 for (i = 0; i < ARRAY_SIZE(data->dts); i++) {
 665                         if (!(data->has_dts & (1 << i)))
 666                                 continue;
 667                         data->dts[i] =
 668                                 w83795_read(client, W83795_REG_DTS(i));
 669                         data->dts_read_vrlsb[i] =
 670                                 w83795_read(client, W83795_REG_VRLSB);
 671                 }
 672         }
 673
 674         /* Update pwm output */
 675         for (i = 0; i < data->has_pwm; i++) {
 676                 data->pwm[i][PWM_OUTPUT] =
 677                     w83795_read(client, W83795_REG_PWM(i, PWM_OUTPUT));
 678         }
 679
 680         /*
 681          * Update intrusion and alarms
 682          * It is important to read intrusion first, because reading from
 683          * register SMI STS6 clears the interrupt status temporarily.
 684          */
 685         tmp = w83795_read(client, W83795_REG_ALARM_CTRL);
 686         /* Switch to interrupt status for intrusion if needed */
 687         if (tmp & ALARM_CTRL_RTSACS)
 688                 w83795_write(client, W83795_REG_ALARM_CTRL,
 689                              tmp & ~ALARM_CTRL_RTSACS);
 690         intrusion = w83795_read(client, W83795_REG_ALARM(5)) & (1 << 6);
 691         /* Switch to real-time alarms */
 692         w83795_write(client, W83795_REG_ALARM_CTRL, tmp | ALARM_CTRL_RTSACS);
 693         for (i = 0; i < ARRAY_SIZE(data->alarms); i++)
 694                 data->alarms[i] = w83795_read(client, W83795_REG_ALARM(i));
 695         data->alarms[5] |= intrusion;
 696         /* Restore original configuration if needed */
 697         if (!(tmp & ALARM_CTRL_RTSACS))
 698                 w83795_write(client, W83795_REG_ALARM_CTRL,
 699                              tmp & ~ALARM_CTRL_RTSACS);
 700
 701         data->last_updated = jiffies;
 702         data->valid = 1;
 703
 704 END:
 705         mutex_unlock(&data->update_lock);
 706         return data;
 707 }
 708
 709 /*
 710  * Sysfs attributes
 711  */
 712
 713 #define ALARM_STATUS      0
 714 #define BEEP_ENABLE       1
 715 static ssize_t
 716 show_alarm_beep(struct device *dev, struct device_attribute *attr, char *buf)
 717 {
 718         struct w83795_data *data = w83795_update_device(dev);
 719         struct sensor_device_attribute_2 *sensor_attr =
 720             to_sensor_dev_attr_2(attr);
 721         int nr = sensor_attr->nr;
 722         int index = sensor_attr->index >> 3;
 723         int bit = sensor_attr->index & 0x07;
 724         u8 val;
 725
 726         if (nr == ALARM_STATUS)
 727                 val = (data->alarms[index] >> bit) & 1;
 728         else            /* BEEP_ENABLE */
 729                 val = (data->beeps[index] >> bit) & 1;
 730
 731         return sprintf(buf, "%u\n", val);
 732 }
 733
 734 static ssize_t
 735 store_beep(struct device *dev, struct device_attribute *attr,
 736            const char *buf, size_t count)
 737 {
 738         struct i2c_client *client = to_i2c_client(dev);
 739         struct w83795_data *data = i2c_get_clientdata(client);
 740         struct sensor_device_attribute_2 *sensor_attr =
 741             to_sensor_dev_attr_2(attr);
 742         int index = sensor_attr->index >> 3;
 743         int shift = sensor_attr->index & 0x07;
 744         u8 beep_bit = 1 << shift;
 745         unsigned long val;
 746
 747         if (kstrtoul(buf, 10, &val) < 0)
 748                 return -EINVAL;
 749         if (val != 0 && val != 1)
 750                 return -EINVAL;
 751
 752         mutex_lock(&data->update_lock);
 753         data->beeps[index] = w83795_read(client, W83795_REG_BEEP(index));
 754         data->beeps[index] &= ~beep_bit;
 755         data->beeps[index] |= val << shift;
 756         w83795_write(client, W83795_REG_BEEP(index), data->beeps[index]);
 757         mutex_unlock(&data->update_lock);
 758
 759         return count;
 760 }
 761
 762 /* Write 0 to clear chassis alarm */
 763 static ssize_t
 764 store_chassis_clear(struct device *dev,
 765                     struct device_attribute *attr, const char *buf,
 766                     size_t count)
 767 {
 768         struct i2c_client *client = to_i2c_client(dev);
 769         struct w83795_data *data = i2c_get_clientdata(client);
 770         unsigned long val;
 771
 772         if (kstrtoul(buf, 10, &val) < 0 || val != 0)
 773                 return -EINVAL;
 774
 775         mutex_lock(&data->update_lock);
 776         val = w83795_read(client, W83795_REG_CLR_CHASSIS);
 777         val |= 0x80;
 778         w83795_write(client, W83795_REG_CLR_CHASSIS, val);
 779
 780         /* Clear status and force cache refresh */
 781         w83795_read(client, W83795_REG_ALARM(5));
 782         data->valid = 0;
 783         mutex_unlock(&data->update_lock);
 784         return count;
 785 }
 786
 787 #define FAN_INPUT     0
 788 #define FAN_MIN       1
 789 static ssize_t
 790 show_fan(struct device *dev, struct device_attribute *attr, char *buf)
 791 {
 792         struct sensor_device_attribute_2 *sensor_attr =
 793             to_sensor_dev_attr_2(attr);
 794         int nr = sensor_attr->nr;
 795         int index = sensor_attr->index;
 796         struct w83795_data *data = w83795_update_device(dev);
 797         u16 val;
 798
 799         if (nr == FAN_INPUT)
 800                 val = data->fan[index] & 0x0fff;
 801         else
 802                 val = data->fan_min[index] & 0x0fff;
 803
 804         return sprintf(buf, "%lu\n", fan_from_reg(val));
 805 }
 806
 807 static ssize_t
 808 store_fan_min(struct device *dev, struct device_attribute *attr,
 809               const char *buf, size_t count)
 810 {
 811         struct sensor_device_attribute_2 *sensor_attr =
 812             to_sensor_dev_attr_2(attr);
 813         int index = sensor_attr->index;
 814         struct i2c_client *client = to_i2c_client(dev);
 815         struct w83795_data *data = i2c_get_clientdata(client);
 816         unsigned long val;
 817
 818         if (kstrtoul(buf, 10, &val))
 819                 return -EINVAL;
 820         val = fan_to_reg(val);
 821
 822         mutex_lock(&data->update_lock);
 823         data->fan_min[index] = val;
 824         w83795_write(client, W83795_REG_FAN_MIN_HL(index), (val >> 4) & 0xff);
 825         val &= 0x0f;
 826         if (index & 1) {
 827                 val <<= 4;
 828                 val |= w83795_read(client, W83795_REG_FAN_MIN_LSB(index))
 829                        & 0x0f;
 830         } else {
 831                 val |= w83795_read(client, W83795_REG_FAN_MIN_LSB(index))
 832                        & 0xf0;
 833         }
 834         w83795_write(client, W83795_REG_FAN_MIN_LSB(index), val & 0xff);
 835         mutex_unlock(&data->update_lock);
 836
 837         return count;
 838 }
 839
 840 static ssize_t
 841 show_pwm(struct device *dev, struct device_attribute *attr, char *buf)
 842 {
 843         struct w83795_data *data;
 844         struct sensor_device_attribute_2 *sensor_attr =
 845             to_sensor_dev_attr_2(attr);
 846         int nr = sensor_attr->nr;
 847         int index = sensor_attr->index;
 848         unsigned int val;
 849
 850         data = nr == PWM_OUTPUT ? w83795_update_device(dev)
 851                                 : w83795_update_pwm_config(dev);
 852
 853         switch (nr) {
 854         case PWM_STOP_TIME:
 855                 val = time_from_reg(data->pwm[index][nr]);
 856                 break;
 857         case PWM_FREQ:
 858                 val = pwm_freq_from_reg(data->pwm[index][nr], data->clkin);
 859                 break;
 860         default:
 861                 val = data->pwm[index][nr];
 862                 break;
 863         }
 864
 865         return sprintf(buf, "%u\n", val);
 866 }
 867
 868 static ssize_t
 869 store_pwm(struct device *dev, struct device_attribute *attr,
 870           const char *buf, size_t count)
 871 {
 872         struct i2c_client *client = to_i2c_client(dev);
 873         struct w83795_data *data = i2c_get_clientdata(client);
 874         struct sensor_device_attribute_2 *sensor_attr =
 875             to_sensor_dev_attr_2(attr);
 876         int nr = sensor_attr->nr;
 877         int index = sensor_attr->index;
 878         unsigned long val;
 879
 880         if (kstrtoul(buf, 10, &val) < 0)
 881                 return -EINVAL;
 882
 883         mutex_lock(&data->update_lock);
 884         switch (nr) {
 885         case PWM_STOP_TIME:
 886                 val = time_to_reg(val);
 887                 break;
 888         case PWM_FREQ:
 889                 val = pwm_freq_to_reg(val, data->clkin);
 890                 break;
 891         default:
 892                 val = SENSORS_LIMIT(val, 0, 0xff);
 893                 break;
 894         }
 895         w83795_write(client, W83795_REG_PWM(index, nr), val);
 896         data->pwm[index][nr] = val;
 897         mutex_unlock(&data->update_lock);
 898         return count;
 899 }
 900
 901 static ssize_t
 902 show_pwm_enable(struct device *dev, struct device_attribute *attr, char *buf)
 903 {
 904         struct sensor_device_attribute_2 *sensor_attr =
 905             to_sensor_dev_attr_2(attr);
 906         struct w83795_data *data = w83795_update_pwm_config(dev);
 907         int index = sensor_attr->index;
 908         u8 tmp;
 909
 910         /* Speed cruise mode */
 911         if (data->pwm_fcms[0] & (1 << index)) {
 912                 tmp = 2;
 913                 goto out;
 914         }
 915         /* Thermal cruise or SmartFan IV mode */
 916         for (tmp = 0; tmp < 6; tmp++) {
 917                 if (data->pwm_tfmr[tmp] & (1 << index)) {
 918                         tmp = 3;
 919                         goto out;
 920                 }
 921         }
 922         /* Manual mode */
 923         tmp = 1;
 924
 925 out:
 926         return sprintf(buf, "%u\n", tmp);
 927 }
 928
 929 static ssize_t
 930 store_pwm_enable(struct device *dev, struct device_attribute *attr,
 931           const char *buf, size_t count)
 932 {
 933         struct i2c_client *client = to_i2c_client(dev);
 934         struct w83795_data *data = w83795_update_pwm_config(dev);
 935         struct sensor_device_attribute_2 *sensor_attr =
 936             to_sensor_dev_attr_2(attr);
 937         int index = sensor_attr->index;
 938         unsigned long val;
 939         int i;
 940
 941         if (kstrtoul(buf, 10, &val) < 0)
 942                 return -EINVAL;
 943         if (val < 1 || val > 2)
 944                 return -EINVAL;
 945
 946 #ifndef CONFIG_SENSORS_W83795_FANCTRL
 947         if (val > 1) {
 948                 dev_warn(dev, "Automatic fan speed control support disabled\n");
 949                 dev_warn(dev, "Build with CONFIG_SENSORS_W83795_FANCTRL=y if you want it\n");
 950                 return -EOPNOTSUPP;
 951         }
 952 #endif
 953
 954         mutex_lock(&data->update_lock);
 955         switch (val) {
 956         case 1:
 957                 /* Clear speed cruise mode bits */
 958                 data->pwm_fcms[0] &= ~(1 << index);
 959                 w83795_write(client, W83795_REG_FCMS1, data->pwm_fcms[0]);
 960                 /* Clear thermal cruise mode bits */
 961                 for (i = 0; i < 6; i++) {
 962                         data->pwm_tfmr[i] &= ~(1 << index);
 963                         w83795_write(client, W83795_REG_TFMR(i),
 964                                 data->pwm_tfmr[i]);
 965                 }
 966                 break;
 967         case 2:
 968                 data->pwm_fcms[0] |= (1 << index);
 969                 w83795_write(client, W83795_REG_FCMS1, data->pwm_fcms[0]);
 970                 break;
 971         }
 972         mutex_unlock(&data->update_lock);
 973         return count;
 974 }
 975
 976 static ssize_t
 977 show_pwm_mode(struct device *dev, struct device_attribute *attr, char *buf)
 978 {
 979         struct w83795_data *data = w83795_update_pwm_config(dev);
 980         int index = to_sensor_dev_attr_2(attr)->index;
 981         unsigned int mode;
 982
 983         if (data->pwm_fomc & (1 << index))
 984                 mode = 0;       /* DC */
 985         else
 986                 mode = 1;       /* PWM */
 987
 988         return sprintf(buf, "%u\n", mode);
 989 }
 990
 991 /*
 992  * Check whether a given temperature source can ever be useful.
 993  * Returns the number of selectable temperature channels which are
 994  * enabled.
 995  */
 996 static int w83795_tss_useful(const struct w83795_data *data, int tsrc)
 997 {
 998         int useful = 0, i;
 999
1000         for (i = 0; i < 4; i++) {
1001                 if (tss_map[i][tsrc] == TSS_MAP_RESERVED)
1002                         continue;
1003                 if (tss_map[i][tsrc] < 6)       /* Analog */
1004                         useful += (data->has_temp >> tss_map[i][tsrc]) & 1;
1005                 else                            /* Digital */
1006                         useful += (data->has_dts >> (tss_map[i][tsrc] - 6)) & 1;
1007         }
1008
1009         return useful;
1010 }
1011
1012 static ssize_t
1013 show_temp_src(struct device *dev, struct device_attribute *attr, char *buf)
1014 {
1015         struct sensor_device_attribute_2 *sensor_attr =
1016             to_sensor_dev_attr_2(attr);
1017         struct w83795_data *data = w83795_update_pwm_config(dev);
1018         int index = sensor_attr->index;
1019         u8 tmp = data->temp_src[index / 2];
1020
1021         if (index & 1)
1022                 tmp >>= 4;      /* Pick high nibble */
1023         else
1024                 tmp &= 0x0f;    /* Pick low nibble */
1025
1026         /* Look-up the actual temperature channel number */
1027         if (tmp >= 4 || tss_map[tmp][index] == TSS_MAP_RESERVED)
1028                 return -EINVAL;         /* Shouldn't happen */
1029
1030         return sprintf(buf, "%u\n", (unsigned int)tss_map[tmp][index] + 1);
1031 }
1032
1033 static ssize_t
1034 store_temp_src(struct device *dev, struct device_attribute *attr,
1035           const char *buf, size_t count)
1036 {
1037         struct i2c_client *client = to_i2c_client(dev);
1038         struct w83795_data *data = w83795_update_pwm_config(dev);
1039         struct sensor_device_attribute_2 *sensor_attr =
1040             to_sensor_dev_attr_2(attr);
1041         int index = sensor_attr->index;
1042         int tmp;
1043         unsigned long channel;
1044         u8 val = index / 2;
1045
1046         if (kstrtoul(buf, 10, &channel) < 0 ||
1047             channel < 1 || channel > 14)
1048                 return -EINVAL;
1049
1050         /* Check if request can be fulfilled */
1051         for (tmp = 0; tmp < 4; tmp++) {
1052                 if (tss_map[tmp][index] == channel - 1)
1053                         break;
1054         }
1055         if (tmp == 4)   /* No match */
1056                 return -EINVAL;
1057
1058         mutex_lock(&data->update_lock);
1059         if (index & 1) {
1060                 tmp <<= 4;
1061                 data->temp_src[val] &= 0x0f;
1062         } else {
1063                 data->temp_src[val] &= 0xf0;
1064         }
1065         data->temp_src[val] |= tmp;
1066         w83795_write(client, W83795_REG_TSS(val), data->temp_src[val]);
1067         mutex_unlock(&data->update_lock);
1068
1069         return count;
1070 }
1071
1072 #define TEMP_PWM_ENABLE   0
1073 #define TEMP_PWM_FAN_MAP  1
1074 static ssize_t
1075 show_temp_pwm_enable(struct device *dev, struct device_attribute *attr,
1076                      char *buf)
1077 {
1078         struct w83795_data *data = w83795_update_pwm_config(dev);
1079         struct sensor_device_attribute_2 *sensor_attr =
1080             to_sensor_dev_attr_2(attr);
1081         int nr = sensor_attr->nr;
1082         int index = sensor_attr->index;
1083         u8 tmp = 0xff;
1084
1085         switch (nr) {
1086         case TEMP_PWM_ENABLE:
1087                 tmp = (data->pwm_fcms[1] >> index) & 1;
1088                 if (tmp)
1089                         tmp = 4;
1090                 else
1091                         tmp = 3;
1092                 break;
1093         case TEMP_PWM_FAN_MAP:
1094                 tmp = data->pwm_tfmr[index];
1095                 break;
1096         }
1097
1098         return sprintf(buf, "%u\n", tmp);
1099 }
1100
1101 static ssize_t
1102 store_temp_pwm_enable(struct device *dev, struct device_attribute *attr,
1103           const char *buf, size_t count)
1104 {
1105         struct i2c_client *client = to_i2c_client(dev);
1106         struct w83795_data *data = w83795_update_pwm_config(dev);
1107         struct sensor_device_attribute_2 *sensor_attr =
1108             to_sensor_dev_attr_2(attr);
1109         int nr = sensor_attr->nr;
1110         int index = sensor_attr->index;
1111         unsigned long tmp;
1112
1113         if (kstrtoul(buf, 10, &tmp) < 0)
1114                 return -EINVAL;
1115
1116         switch (nr) {
1117         case TEMP_PWM_ENABLE:
1118                 if (tmp != 3 && tmp != 4)
1119                         return -EINVAL;
1120                 tmp -= 3;
1121                 mutex_lock(&data->update_lock);
1122                 data->pwm_fcms[1] &= ~(1 << index);
1123                 data->pwm_fcms[1] |= tmp << index;
1124                 w83795_write(client, W83795_REG_FCMS2, data->pwm_fcms[1]);
1125                 mutex_unlock(&data->update_lock);
1126                 break;
1127         case TEMP_PWM_FAN_MAP:
1128                 mutex_lock(&data->update_lock);
1129                 tmp = SENSORS_LIMIT(tmp, 0, 0xff);
1130                 w83795_write(client, W83795_REG_TFMR(index), tmp);
1131                 data->pwm_tfmr[index] = tmp;
1132                 mutex_unlock(&data->update_lock);
1133                 break;
1134         }
1135         return count;
1136 }
1137
1138 #define FANIN_TARGET   0
1139 #define FANIN_TOL      1
1140 static ssize_t
1141 show_fanin(struct device *dev, struct device_attribute *attr, char *buf)
1142 {
1143         struct w83795_data *data = w83795_update_pwm_config(dev);
1144         struct sensor_device_attribute_2 *sensor_attr =
1145             to_sensor_dev_attr_2(attr);
1146         int nr = sensor_attr->nr;
1147         int index = sensor_attr->index;
1148         u16 tmp = 0;
1149
1150         switch (nr) {
1151         case FANIN_TARGET:
1152                 tmp = fan_from_reg(data->target_speed[index]);
1153                 break;
1154         case FANIN_TOL:
1155                 tmp = data->tol_speed;
1156                 break;
1157         }
1158
1159         return sprintf(buf, "%u\n", tmp);
1160 }
1161
1162 static ssize_t
1163 store_fanin(struct device *dev, struct device_attribute *attr,
1164           const char *buf, size_t count)
1165 {
1166         struct i2c_client *client = to_i2c_client(dev);
1167         struct w83795_data *data = i2c_get_clientdata(client);
1168         struct sensor_device_attribute_2 *sensor_attr =
1169             to_sensor_dev_attr_2(attr);
1170         int nr = sensor_attr->nr;
1171         int index = sensor_attr->index;
1172         unsigned long val;
1173
1174         if (kstrtoul(buf, 10, &val) < 0)
1175                 return -EINVAL;
1176
1177         mutex_lock(&data->update_lock);
1178         switch (nr) {
1179         case FANIN_TARGET:
1180                 val = fan_to_reg(SENSORS_LIMIT(val, 0, 0xfff));
1181                 w83795_write(client, W83795_REG_FTSH(index), val >> 4);
1182                 w83795_write(client, W83795_REG_FTSL(index), (val << 4) & 0xf0);
1183                 data->target_speed[index] = val;
1184                 break;
1185         case FANIN_TOL:
1186                 val = SENSORS_LIMIT(val, 0, 0x3f);
1187                 w83795_write(client, W83795_REG_TFTS, val);
1188                 data->tol_speed = val;
1189                 break;
1190         }
1191         mutex_unlock(&data->update_lock);
1192
1193         return count;
1194 }
1195
1196
1197 static ssize_t
1198 show_temp_pwm(struct device *dev, struct device_attribute *attr, char *buf)
1199 {
1200         struct w83795_data *data = w83795_update_pwm_config(dev);
1201         struct sensor_device_attribute_2 *sensor_attr =
1202             to_sensor_dev_attr_2(attr);
1203         int nr = sensor_attr->nr;
1204         int index = sensor_attr->index;
1205         long tmp = temp_from_reg(data->pwm_temp[index][nr]);
1206
1207         return sprintf(buf, "%ld\n", tmp);
1208 }
1209
1210 static ssize_t
1211 store_temp_pwm(struct device *dev, struct device_attribute *attr,
1212           const char *buf, size_t count)
1213 {
1214         struct i2c_client *client = to_i2c_client(dev);
1215         struct w83795_data *data = i2c_get_clientdata(client);
1216         struct sensor_device_attribute_2 *sensor_attr =
1217             to_sensor_dev_attr_2(attr);
1218         int nr = sensor_attr->nr;
1219         int index = sensor_attr->index;
1220         unsigned long val;
1221         u8 tmp;
1222
1223         if (kstrtoul(buf, 10, &val) < 0)
1224                 return -EINVAL;
1225         val /= 1000;
1226
1227         mutex_lock(&data->update_lock);
1228         switch (nr) {
1229         case TEMP_PWM_TTTI:
1230                 val = SENSORS_LIMIT(val, 0, 0x7f);
1231                 w83795_write(client, W83795_REG_TTTI(index), val);
1232                 break;
1233         case TEMP_PWM_CTFS:
1234                 val = SENSORS_LIMIT(val, 0, 0x7f);
1235                 w83795_write(client, W83795_REG_CTFS(index), val);
1236                 break;
1237         case TEMP_PWM_HCT:
1238                 val = SENSORS_LIMIT(val, 0, 0x0f);
1239                 tmp = w83795_read(client, W83795_REG_HT(index));
1240                 tmp &= 0x0f;
1241                 tmp |= (val << 4) & 0xf0;
1242                 w83795_write(client, W83795_REG_HT(index), tmp);
1243                 break;
1244         case TEMP_PWM_HOT:
1245                 val = SENSORS_LIMIT(val, 0, 0x0f);
1246                 tmp = w83795_read(client, W83795_REG_HT(index));
1247                 tmp &= 0xf0;
1248                 tmp |= val & 0x0f;
1249                 w83795_write(client, W83795_REG_HT(index), tmp);
1250                 break;
1251         }
1252         data->pwm_temp[index][nr] = val;
1253         mutex_unlock(&data->update_lock);
1254
1255         return count;
1256 }
1257
1258 static ssize_t
1259 show_sf4_pwm(struct device *dev, struct device_attribute *attr, char *buf)
1260 {
1261         struct w83795_data *data = w83795_update_pwm_config(dev);
1262         struct sensor_device_attribute_2 *sensor_attr =
1263             to_sensor_dev_attr_2(attr);
1264         int nr = sensor_attr->nr;
1265         int index = sensor_attr->index;
1266
1267         return sprintf(buf, "%u\n", data->sf4_reg[index][SF4_PWM][nr]);
1268 }
1269
1270 static ssize_t
1271 store_sf4_pwm(struct device *dev, struct device_attribute *attr,
1272           const char *buf, size_t count)
1273 {
1274         struct i2c_client *client = to_i2c_client(dev);
1275         struct w83795_data *data = i2c_get_clientdata(client);
1276         struct sensor_device_attribute_2 *sensor_attr =
1277             to_sensor_dev_attr_2(attr);
1278         int nr = sensor_attr->nr;
1279         int index = sensor_attr->index;
1280         unsigned long val;
1281
1282         if (kstrtoul(buf, 10, &val) < 0)
1283                 return -EINVAL;
1284
1285         mutex_lock(&data->update_lock);
1286         w83795_write(client, W83795_REG_SF4_PWM(index, nr), val);
1287         data->sf4_reg[index][SF4_PWM][nr] = val;
1288         mutex_unlock(&data->update_lock);
1289
1290         return count;
1291 }
1292
1293 static ssize_t
1294 show_sf4_temp(struct device *dev, struct device_attribute *attr, char *buf)
1295 {
1296         struct w83795_data *data = w83795_update_pwm_config(dev);
1297         struct sensor_device_attribute_2 *sensor_attr =
1298             to_sensor_dev_attr_2(attr);
1299         int nr = sensor_attr->nr;
1300         int index = sensor_attr->index;
1301
1302         return sprintf(buf, "%u\n",
1303                 (data->sf4_reg[index][SF4_TEMP][nr]) * 1000);
1304 }
1305
1306 static ssize_t
1307 store_sf4_temp(struct device *dev, struct device_attribute *attr,
1308           const char *buf, size_t count)
1309 {
1310         struct i2c_client *client = to_i2c_client(dev);
1311         struct w83795_data *data = i2c_get_clientdata(client);
1312         struct sensor_device_attribute_2 *sensor_attr =
1313             to_sensor_dev_attr_2(attr);
1314         int nr = sensor_attr->nr;
1315         int index = sensor_attr->index;
1316         unsigned long val;
1317
1318         if (kstrtoul(buf, 10, &val) < 0)
1319                 return -EINVAL;
1320         val /= 1000;
1321
1322         mutex_lock(&data->update_lock);
1323         w83795_write(client, W83795_REG_SF4_TEMP(index, nr), val);
1324         data->sf4_reg[index][SF4_TEMP][nr] = val;
1325         mutex_unlock(&data->update_lock);
1326
1327         return count;
1328 }
1329
1330
1331 static ssize_t
1332 show_temp(struct device *dev, struct device_attribute *attr, char *buf)
1333 {
1334         struct sensor_device_attribute_2 *sensor_attr =
1335             to_sensor_dev_attr_2(attr);
1336         int nr = sensor_attr->nr;
1337         int index = sensor_attr->index;
1338         struct w83795_data *data = w83795_update_device(dev);
1339         long temp = temp_from_reg(data->temp[index][nr]);
1340
1341         if (nr == TEMP_READ)
1342                 temp += (data->temp_read_vrlsb[index] >> 6) * 250;
1343         return sprintf(buf, "%ld\n", temp);
1344 }
1345
1346 static ssize_t
1347 store_temp(struct device *dev, struct device_attribute *attr,
1348            const char *buf, size_t count)
1349 {
1350         struct sensor_device_attribute_2 *sensor_attr =
1351             to_sensor_dev_attr_2(attr);
1352         int nr = sensor_attr->nr;
1353         int index = sensor_attr->index;
1354         struct i2c_client *client = to_i2c_client(dev);
1355         struct w83795_data *data = i2c_get_clientdata(client);
1356         long tmp;
1357
1358         if (kstrtol(buf, 10, &tmp) < 0)
1359                 return -EINVAL;
1360
1361         mutex_lock(&data->update_lock);
1362         data->temp[index][nr] = temp_to_reg(tmp, -128, 127);
1363         w83795_write(client, W83795_REG_TEMP[index][nr], data->temp[index][nr]);
1364         mutex_unlock(&data->update_lock);
1365         return count;
1366 }
1367
1368
1369 static ssize_t
1370 show_dts_mode(struct device *dev, struct device_attribute *attr, char *buf)
1371 {
1372         struct w83795_data *data = dev_get_drvdata(dev);
1373         int tmp;
1374
1375         if (data->enable_dts & 2)
1376                 tmp = 5;
1377         else
1378                 tmp = 6;
1379
1380         return sprintf(buf, "%d\n", tmp);
1381 }
1382
1383 static ssize_t
1384 show_dts(struct device *dev, struct device_attribute *attr, char *buf)
1385 {
1386         struct sensor_device_attribute_2 *sensor_attr =
1387             to_sensor_dev_attr_2(attr);
1388         int index = sensor_attr->index;
1389         struct w83795_data *data = w83795_update_device(dev);
1390         long temp = temp_from_reg(data->dts[index]);
1391
1392         temp += (data->dts_read_vrlsb[index] >> 6) * 250;
1393         return sprintf(buf, "%ld\n", temp);
1394 }
1395
1396 static ssize_t
1397 show_dts_ext(struct device *dev, struct device_attribute *attr, char *buf)
1398 {
1399         struct sensor_device_attribute_2 *sensor_attr =
1400             to_sensor_dev_attr_2(attr);
1401         int nr = sensor_attr->nr;
1402         struct w83795_data *data = dev_get_drvdata(dev);
1403         long temp = temp_from_reg(data->dts_ext[nr]);
1404
1405         return sprintf(buf, "%ld\n", temp);
1406 }
1407
1408 static ssize_t
1409 store_dts_ext(struct device *dev, struct device_attribute *attr,
1410            const char *buf, size_t count)
1411 {
1412         struct sensor_device_attribute_2 *sensor_attr =
1413             to_sensor_dev_attr_2(attr);
1414         int nr = sensor_attr->nr;
1415         struct i2c_client *client = to_i2c_client(dev);
1416         struct w83795_data *data = i2c_get_clientdata(client);
1417         long tmp;
1418
1419         if (kstrtol(buf, 10, &tmp) < 0)
1420                 return -EINVAL;
1421
1422         mutex_lock(&data->update_lock);
1423         data->dts_ext[nr] = temp_to_reg(tmp, -128, 127);
1424         w83795_write(client, W83795_REG_DTS_EXT(nr), data->dts_ext[nr]);
1425         mutex_unlock(&data->update_lock);
1426         return count;
1427 }
1428
1429
1430 static ssize_t
1431 show_temp_mode(struct device *dev, struct device_attribute *attr, char *buf)
1432 {
1433         struct w83795_data *data = dev_get_drvdata(dev);
1434         struct sensor_device_attribute_2 *sensor_attr =
1435             to_sensor_dev_attr_2(attr);
1436         int index = sensor_attr->index;
1437         int tmp;
1438
1439         if (data->temp_mode & (1 << index))
1440                 tmp = 3;        /* Thermal diode */
1441         else
1442                 tmp = 4;        /* Thermistor */
1443
1444         return sprintf(buf, "%d\n", tmp);
1445 }
1446
1447 /* Only for temp1-4 (temp5-6 can only be thermistor) */
1448 static ssize_t
1449 store_temp_mode(struct device *dev, struct device_attribute *attr,
1450                 const char *buf, size_t count)
1451 {
1452         struct i2c_client *client = to_i2c_client(dev);
1453         struct w83795_data *data = i2c_get_clientdata(client);
1454         struct sensor_device_attribute_2 *sensor_attr =
1455             to_sensor_dev_attr_2(attr);
1456         int index = sensor_attr->index;
1457         int reg_shift;
1458         unsigned long val;
1459         u8 tmp;
1460
1461         if (kstrtoul(buf, 10, &val) < 0)
1462                 return -EINVAL;
1463         if ((val != 4) && (val != 3))
1464                 return -EINVAL;
1465
1466         mutex_lock(&data->update_lock);
1467         if (val == 3) {
1468                 /* Thermal diode */
1469                 val = 0x01;
1470                 data->temp_mode |= 1 << index;
1471         } else if (val == 4) {
1472                 /* Thermistor */
1473                 val = 0x03;
1474                 data->temp_mode &= ~(1 << index);
1475         }
1476
1477         reg_shift = 2 * index;
1478         tmp = w83795_read(client, W83795_REG_TEMP_CTRL2);
1479         tmp &= ~(0x03 << reg_shift);
1480         tmp |= val << reg_shift;
1481         w83795_write(client, W83795_REG_TEMP_CTRL2, tmp);
1482
1483         mutex_unlock(&data->update_lock);
1484         return count;
1485 }
1486
1487
1488 /* show/store VIN */
1489 static ssize_t
1490 show_in(struct device *dev, struct device_attribute *attr, char *buf)
1491 {
1492         struct sensor_device_attribute_2 *sensor_attr =
1493             to_sensor_dev_attr_2(attr);
1494         int nr = sensor_attr->nr;
1495         int index = sensor_attr->index;
1496         struct w83795_data *data = w83795_update_device(dev);
1497         u16 val = data->in[index][nr];
1498         u8 lsb_idx;
1499
1500         switch (nr) {
1501         case IN_READ:
1502                 /* calculate this value again by sensors as sensors3.conf */
1503                 if ((index >= 17) &&
1504                     !((data->has_gain >> (index - 17)) & 1))
1505                         val *= 8;
1506                 break;
1507         case IN_MAX:
1508         case IN_LOW:
1509                 lsb_idx = IN_LSB_SHIFT_IDX[index][IN_LSB_IDX];
1510                 val <<= 2;
1511                 val |= (data->in_lsb[lsb_idx][nr] >>
1512                         IN_LSB_SHIFT_IDX[index][IN_LSB_SHIFT]) & 0x03;
1513                 if ((index >= 17) &&
1514                     !((data->has_gain >> (index - 17)) & 1))
1515                         val *= 8;
1516                 break;
1517         }
1518         val = in_from_reg(index, val);
1519
1520         return sprintf(buf, "%d\n", val);
1521 }
1522
1523 static ssize_t
1524 store_in(struct device *dev, struct device_attribute *attr,
1525          const char *buf, size_t count)
1526 {
1527         struct sensor_device_attribute_2 *sensor_attr =
1528             to_sensor_dev_attr_2(attr);
1529         int nr = sensor_attr->nr;
1530         int index = sensor_attr->index;
1531         struct i2c_client *client = to_i2c_client(dev);
1532         struct w83795_data *data = i2c_get_clientdata(client);
1533         unsigned long val;
1534         u8 tmp;
1535         u8 lsb_idx;
1536
1537         if (kstrtoul(buf, 10, &val) < 0)
1538                 return -EINVAL;
1539         val = in_to_reg(index, val);
1540
1541         if ((index >= 17) &&
1542             !((data->has_gain >> (index - 17)) & 1))
1543                 val /= 8;
1544         val = SENSORS_LIMIT(val, 0, 0x3FF);
1545         mutex_lock(&data->update_lock);
1546
1547         lsb_idx = IN_LSB_SHIFT_IDX[index][IN_LSB_IDX];
1548         tmp = w83795_read(client, IN_LSB_REG(lsb_idx, nr));
1549         tmp &= ~(0x03 << IN_LSB_SHIFT_IDX[index][IN_LSB_SHIFT]);
1550         tmp |= (val & 0x03) << IN_LSB_SHIFT_IDX[index][IN_LSB_SHIFT];
1551         w83795_write(client, IN_LSB_REG(lsb_idx, nr), tmp);
1552         data->in_lsb[lsb_idx][nr] = tmp;
1553
1554         tmp = (val >> 2) & 0xff;
1555         w83795_write(client, W83795_REG_IN[index][nr], tmp);
1556         data->in[index][nr] = tmp;
1557
1558         mutex_unlock(&data->update_lock);
1559         return count;
1560 }
1561
1562
1563 #ifdef CONFIG_SENSORS_W83795_FANCTRL
1564 static ssize_t
1565 show_sf_setup(struct device *dev, struct device_attribute *attr, char *buf)
1566 {
1567         struct sensor_device_attribute_2 *sensor_attr =
1568             to_sensor_dev_attr_2(attr);
1569         int nr = sensor_attr->nr;
1570         struct w83795_data *data = w83795_update_pwm_config(dev);
1571         u16 val = data->setup_pwm[nr];
1572
1573         switch (nr) {
1574         case SETUP_PWM_UPTIME:
1575         case SETUP_PWM_DOWNTIME:
1576                 val = time_from_reg(val);
1577                 break;
1578         }
1579
1580         return sprintf(buf, "%d\n", val);
1581 }
1582
1583 static ssize_t
1584 store_sf_setup(struct device *dev, struct device_attribute *attr,
1585          const char *buf, size_t count)
1586 {
1587         struct sensor_device_attribute_2 *sensor_attr =
1588             to_sensor_dev_attr_2(attr);
1589         int nr = sensor_attr->nr;
1590         struct i2c_client *client = to_i2c_client(dev);
1591         struct w83795_data *data = i2c_get_clientdata(client);
1592         unsigned long val;
1593
1594         if (kstrtoul(buf, 10, &val) < 0)
1595                 return -EINVAL;
1596
1597         switch (nr) {
1598         case SETUP_PWM_DEFAULT:
1599                 val = SENSORS_LIMIT(val, 0, 0xff);
1600                 break;
1601         case SETUP_PWM_UPTIME:
1602         case SETUP_PWM_DOWNTIME:
1603                 val = time_to_reg(val);
1604                 if (val == 0)
1605                         return -EINVAL;
1606                 break;
1607         }
1608
1609         mutex_lock(&data->update_lock);
1610         data->setup_pwm[nr] = val;
1611         w83795_write(client, W83795_REG_SETUP_PWM(nr), val);
1612         mutex_unlock(&data->update_lock);
1613         return count;
1614 }
1615 #endif
1616
1617
1618 #define NOT_USED                        -1
1619
1620 /*
1621  * Don't change the attribute order, _max, _min and _beep are accessed by index
1622  * somewhere else in the code
1623  */
1624 #define SENSOR_ATTR_IN(index) {                                         \
1625         SENSOR_ATTR_2(in##index##_input, S_IRUGO, show_in, NULL,        \
1626                 IN_READ, index), \
1627         SENSOR_ATTR_2(in##index##_max, S_IRUGO | S_IWUSR, show_in,      \
1628                 store_in, IN_MAX, index),                               \
1629         SENSOR_ATTR_2(in##index##_min, S_IRUGO | S_IWUSR, show_in,      \
1630                 store_in, IN_LOW, index),                               \
1631         SENSOR_ATTR_2(in##index##_alarm, S_IRUGO, show_alarm_beep,      \
1632                 NULL, ALARM_STATUS, index + ((index > 14) ? 1 : 0)), \
1633         SENSOR_ATTR_2(in##index##_beep, S_IWUSR | S_IRUGO,              \
1634                 show_alarm_beep, store_beep, BEEP_ENABLE,               \
1635                 index + ((index > 14) ? 1 : 0)) }
1636
1637 /*
1638  * Don't change the attribute order, _beep is accessed by index
1639  * somewhere else in the code
1640  */
1641 #define SENSOR_ATTR_FAN(index) {                                        \
1642         SENSOR_ATTR_2(fan##index##_input, S_IRUGO, show_fan,            \
1643                 NULL, FAN_INPUT, index - 1), \
1644         SENSOR_ATTR_2(fan##index##_min, S_IWUSR | S_IRUGO,              \
1645                 show_fan, store_fan_min, FAN_MIN, index - 1),   \
1646         SENSOR_ATTR_2(fan##index##_alarm, S_IRUGO, show_alarm_beep,     \
1647                 NULL, ALARM_STATUS, index + 31),                        \
1648         SENSOR_ATTR_2(fan##index##_beep, S_IWUSR | S_IRUGO,             \
1649                 show_alarm_beep, store_beep, BEEP_ENABLE, index + 31) }
1650
1651 #define SENSOR_ATTR_PWM(index) {                                        \
1652         SENSOR_ATTR_2(pwm##index, S_IWUSR | S_IRUGO, show_pwm,          \
1653                 store_pwm, PWM_OUTPUT, index - 1),                      \
1654         SENSOR_ATTR_2(pwm##index##_enable, S_IWUSR | S_IRUGO,           \
1655                 show_pwm_enable, store_pwm_enable, NOT_USED, index - 1), \
1656         SENSOR_ATTR_2(pwm##index##_mode, S_IRUGO,                       \
1657                 show_pwm_mode, NULL, NOT_USED, index - 1),              \
1658         SENSOR_ATTR_2(pwm##index##_freq, S_IWUSR | S_IRUGO,             \
1659                 show_pwm, store_pwm, PWM_FREQ, index - 1),              \
1660         SENSOR_ATTR_2(pwm##index##_nonstop, S_IWUSR | S_IRUGO,          \
1661                 show_pwm, store_pwm, PWM_NONSTOP, index - 1),           \
1662         SENSOR_ATTR_2(pwm##index##_start, S_IWUSR | S_IRUGO,            \
1663                 show_pwm, store_pwm, PWM_START, index - 1),             \
1664         SENSOR_ATTR_2(pwm##index##_stop_time, S_IWUSR | S_IRUGO,        \
1665                 show_pwm, store_pwm, PWM_STOP_TIME, index - 1),  \
1666         SENSOR_ATTR_2(fan##index##_target, S_IWUSR | S_IRUGO, \
1667                 show_fanin, store_fanin, FANIN_TARGET, index - 1) }
1668
1669 /*
1670  * Don't change the attribute order, _beep is accessed by index
1671  * somewhere else in the code
1672  */
1673 #define SENSOR_ATTR_DTS(index) {                                        \
1674         SENSOR_ATTR_2(temp##index##_type, S_IRUGO ,             \
1675                 show_dts_mode, NULL, NOT_USED, index - 7),      \
1676         SENSOR_ATTR_2(temp##index##_input, S_IRUGO, show_dts,           \
1677                 NULL, NOT_USED, index - 7),                             \
1678         SENSOR_ATTR_2(temp##index##_crit, S_IRUGO | S_IWUSR, show_dts_ext, \
1679                 store_dts_ext, DTS_CRIT, NOT_USED),                     \
1680         SENSOR_ATTR_2(temp##index##_crit_hyst, S_IRUGO | S_IWUSR,       \
1681                 show_dts_ext, store_dts_ext, DTS_CRIT_HYST, NOT_USED),  \
1682         SENSOR_ATTR_2(temp##index##_max, S_IRUGO | S_IWUSR, show_dts_ext, \
1683                 store_dts_ext, DTS_WARN, NOT_USED),                     \
1684         SENSOR_ATTR_2(temp##index##_max_hyst, S_IRUGO | S_IWUSR,        \
1685                 show_dts_ext, store_dts_ext, DTS_WARN_HYST, NOT_USED),  \
1686         SENSOR_ATTR_2(temp##index##_alarm, S_IRUGO,                     \
1687                 show_alarm_beep, NULL, ALARM_STATUS, index + 17),       \
1688         SENSOR_ATTR_2(temp##index##_beep, S_IWUSR | S_IRUGO,            \
1689                 show_alarm_beep, store_beep, BEEP_ENABLE, index + 17) }
1690
1691 /*
1692  * Don't change the attribute order, _beep is accessed by index
1693  * somewhere else in the code
1694  */
1695 #define SENSOR_ATTR_TEMP(index) {                                       \
1696         SENSOR_ATTR_2(temp##index##_type, S_IRUGO | (index < 4 ? S_IWUSR : 0), \
1697                 show_temp_mode, store_temp_mode, NOT_USED, index - 1),  \
1698         SENSOR_ATTR_2(temp##index##_input, S_IRUGO, show_temp,          \
1699                 NULL, TEMP_READ, index - 1),                            \
1700         SENSOR_ATTR_2(temp##index##_crit, S_IRUGO | S_IWUSR, show_temp, \
1701                 store_temp, TEMP_CRIT, index - 1),                      \
1702         SENSOR_ATTR_2(temp##index##_crit_hyst, S_IRUGO | S_IWUSR,       \
1703                 show_temp, store_temp, TEMP_CRIT_HYST, index - 1),      \
1704         SENSOR_ATTR_2(temp##index##_max, S_IRUGO | S_IWUSR, show_temp,  \
1705                 store_temp, TEMP_WARN, index - 1),                      \
1706         SENSOR_ATTR_2(temp##index##_max_hyst, S_IRUGO | S_IWUSR,        \
1707                 show_temp, store_temp, TEMP_WARN_HYST, index - 1),      \
1708         SENSOR_ATTR_2(temp##index##_alarm, S_IRUGO,                     \
1709                 show_alarm_beep, NULL, ALARM_STATUS,                    \
1710                 index + (index > 4 ? 11 : 17)),                         \
1711         SENSOR_ATTR_2(temp##index##_beep, S_IWUSR | S_IRUGO,            \
1712                 show_alarm_beep, store_beep, BEEP_ENABLE,               \
1713                 index + (index > 4 ? 11 : 17)),                         \
1714         SENSOR_ATTR_2(temp##index##_pwm_enable, S_IWUSR | S_IRUGO,      \
1715                 show_temp_pwm_enable, store_temp_pwm_enable,            \
1716                 TEMP_PWM_ENABLE, index - 1),                            \
1717         SENSOR_ATTR_2(temp##index##_auto_channels_pwm, S_IWUSR | S_IRUGO, \
1718                 show_temp_pwm_enable, store_temp_pwm_enable,            \
1719                 TEMP_PWM_FAN_MAP, index - 1),                           \
1720         SENSOR_ATTR_2(thermal_cruise##index, S_IWUSR | S_IRUGO,         \
1721                 show_temp_pwm, store_temp_pwm, TEMP_PWM_TTTI, index - 1), \
1722         SENSOR_ATTR_2(temp##index##_warn, S_IWUSR | S_IRUGO,            \
1723                 show_temp_pwm, store_temp_pwm, TEMP_PWM_CTFS, index - 1), \
1724         SENSOR_ATTR_2(temp##index##_warn_hyst, S_IWUSR | S_IRUGO,       \
1725                 show_temp_pwm, store_temp_pwm, TEMP_PWM_HCT, index - 1), \
1726         SENSOR_ATTR_2(temp##index##_operation_hyst, S_IWUSR | S_IRUGO,  \
1727                 show_temp_pwm, store_temp_pwm, TEMP_PWM_HOT, index - 1), \
1728         SENSOR_ATTR_2(temp##index##_auto_point1_pwm, S_IRUGO | S_IWUSR, \
1729                 show_sf4_pwm, store_sf4_pwm, 0, index - 1),             \
1730         SENSOR_ATTR_2(temp##index##_auto_point2_pwm, S_IRUGO | S_IWUSR, \
1731                 show_sf4_pwm, store_sf4_pwm, 1, index - 1),             \
1732         SENSOR_ATTR_2(temp##index##_auto_point3_pwm, S_IRUGO | S_IWUSR, \
1733                 show_sf4_pwm, store_sf4_pwm, 2, index - 1),             \
1734         SENSOR_ATTR_2(temp##index##_auto_point4_pwm, S_IRUGO | S_IWUSR, \
1735                 show_sf4_pwm, store_sf4_pwm, 3, index - 1),             \
1736         SENSOR_ATTR_2(temp##index##_auto_point5_pwm, S_IRUGO | S_IWUSR, \
1737                 show_sf4_pwm, store_sf4_pwm, 4, index - 1),             \
1738         SENSOR_ATTR_2(temp##index##_auto_point6_pwm, S_IRUGO | S_IWUSR, \
1739                 show_sf4_pwm, store_sf4_pwm, 5, index - 1),             \
1740         SENSOR_ATTR_2(temp##index##_auto_point7_pwm, S_IRUGO | S_IWUSR, \
1741                 show_sf4_pwm, store_sf4_pwm, 6, index - 1),             \
1742         SENSOR_ATTR_2(temp##index##_auto_point1_temp, S_IRUGO | S_IWUSR,\
1743                 show_sf4_temp, store_sf4_temp, 0, index - 1),           \
1744         SENSOR_ATTR_2(temp##index##_auto_point2_temp, S_IRUGO | S_IWUSR,\
1745                 show_sf4_temp, store_sf4_temp, 1, index - 1),           \
1746         SENSOR_ATTR_2(temp##index##_auto_point3_temp, S_IRUGO | S_IWUSR,\
1747                 show_sf4_temp, store_sf4_temp, 2, index - 1),           \
1748         SENSOR_ATTR_2(temp##index##_auto_point4_temp, S_IRUGO | S_IWUSR,\
1749                 show_sf4_temp, store_sf4_temp, 3, index - 1),           \
1750         SENSOR_ATTR_2(temp##index##_auto_point5_temp, S_IRUGO | S_IWUSR,\
1751                 show_sf4_temp, store_sf4_temp, 4, index - 1),           \
1752         SENSOR_ATTR_2(temp##index##_auto_point6_temp, S_IRUGO | S_IWUSR,\
1753                 show_sf4_temp, store_sf4_temp, 5, index - 1),           \
1754         SENSOR_ATTR_2(temp##index##_auto_point7_temp, S_IRUGO | S_IWUSR,\
1755                 show_sf4_temp, store_sf4_temp, 6, index - 1) }
1756
1757
1758 static struct sensor_device_attribute_2 w83795_in[][5] = {
1759         SENSOR_ATTR_IN(0),
1760         SENSOR_ATTR_IN(1),
1761         SENSOR_ATTR_IN(2),
1762         SENSOR_ATTR_IN(3),
1763         SENSOR_ATTR_IN(4),
1764         SENSOR_ATTR_IN(5),
1765         SENSOR_ATTR_IN(6),
1766         SENSOR_ATTR_IN(7),
1767         SENSOR_ATTR_IN(8),
1768         SENSOR_ATTR_IN(9),
1769         SENSOR_ATTR_IN(10),
1770         SENSOR_ATTR_IN(11),
1771         SENSOR_ATTR_IN(12),
1772         SENSOR_ATTR_IN(13),
1773         SENSOR_ATTR_IN(14),
1774         SENSOR_ATTR_IN(15),
1775         SENSOR_ATTR_IN(16),
1776         SENSOR_ATTR_IN(17),
1777         SENSOR_ATTR_IN(18),
1778         SENSOR_ATTR_IN(19),
1779         SENSOR_ATTR_IN(20),
1780 };
1781
1782 static const struct sensor_device_attribute_2 w83795_fan[][4] = {
1783         SENSOR_ATTR_FAN(1),
1784         SENSOR_ATTR_FAN(2),
1785         SENSOR_ATTR_FAN(3),
1786         SENSOR_ATTR_FAN(4),
1787         SENSOR_ATTR_FAN(5),
1788         SENSOR_ATTR_FAN(6),
1789         SENSOR_ATTR_FAN(7),
1790         SENSOR_ATTR_FAN(8),
1791         SENSOR_ATTR_FAN(9),
1792         SENSOR_ATTR_FAN(10),
1793         SENSOR_ATTR_FAN(11),
1794         SENSOR_ATTR_FAN(12),
1795         SENSOR_ATTR_FAN(13),
1796         SENSOR_ATTR_FAN(14),
1797 };
1798
1799 static const struct sensor_device_attribute_2 w83795_temp[][28] = {
1800         SENSOR_ATTR_TEMP(1),
1801         SENSOR_ATTR_TEMP(2),
1802         SENSOR_ATTR_TEMP(3),
1803         SENSOR_ATTR_TEMP(4),
1804         SENSOR_ATTR_TEMP(5),
1805         SENSOR_ATTR_TEMP(6),
1806 };
1807
1808 static const struct sensor_device_attribute_2 w83795_dts[][8] = {
1809         SENSOR_ATTR_DTS(7),
1810         SENSOR_ATTR_DTS(8),
1811         SENSOR_ATTR_DTS(9),
1812         SENSOR_ATTR_DTS(10),
1813         SENSOR_ATTR_DTS(11),
1814         SENSOR_ATTR_DTS(12),
1815         SENSOR_ATTR_DTS(13),
1816         SENSOR_ATTR_DTS(14),
1817 };
1818
1819 static const struct sensor_device_attribute_2 w83795_pwm[][8] = {
1820         SENSOR_ATTR_PWM(1),
1821         SENSOR_ATTR_PWM(2),
1822         SENSOR_ATTR_PWM(3),
1823         SENSOR_ATTR_PWM(4),
1824         SENSOR_ATTR_PWM(5),
1825         SENSOR_ATTR_PWM(6),
1826         SENSOR_ATTR_PWM(7),
1827         SENSOR_ATTR_PWM(8),
1828 };
1829
1830 static const struct sensor_device_attribute_2 w83795_tss[6] = {
1831         SENSOR_ATTR_2(temp1_source_sel, S_IWUSR | S_IRUGO,
1832                       show_temp_src, store_temp_src, NOT_USED, 0),
1833         SENSOR_ATTR_2(temp2_source_sel, S_IWUSR | S_IRUGO,
1834                       show_temp_src, store_temp_src, NOT_USED, 1),
1835         SENSOR_ATTR_2(temp3_source_sel, S_IWUSR | S_IRUGO,
1836                       show_temp_src, store_temp_src, NOT_USED, 2),
1837         SENSOR_ATTR_2(temp4_source_sel, S_IWUSR | S_IRUGO,
1838                       show_temp_src, store_temp_src, NOT_USED, 3),
1839         SENSOR_ATTR_2(temp5_source_sel, S_IWUSR | S_IRUGO,
1840                       show_temp_src, store_temp_src, NOT_USED, 4),
1841         SENSOR_ATTR_2(temp6_source_sel, S_IWUSR | S_IRUGO,
1842                       show_temp_src, store_temp_src, NOT_USED, 5),
1843 };
1844
1845 static const struct sensor_device_attribute_2 sda_single_files[] = {
1846         SENSOR_ATTR_2(intrusion0_alarm, S_IWUSR | S_IRUGO, show_alarm_beep,
1847                       store_chassis_clear, ALARM_STATUS, 46),
1848 #ifdef CONFIG_SENSORS_W83795_FANCTRL
1849         SENSOR_ATTR_2(speed_cruise_tolerance, S_IWUSR | S_IRUGO, show_fanin,
1850                 store_fanin, FANIN_TOL, NOT_USED),
1851         SENSOR_ATTR_2(pwm_default, S_IWUSR | S_IRUGO, show_sf_setup,
1852                       store_sf_setup, SETUP_PWM_DEFAULT, NOT_USED),
1853         SENSOR_ATTR_2(pwm_uptime, S_IWUSR | S_IRUGO, show_sf_setup,
1854                       store_sf_setup, SETUP_PWM_UPTIME, NOT_USED),
1855         SENSOR_ATTR_2(pwm_downtime, S_IWUSR | S_IRUGO, show_sf_setup,
1856                       store_sf_setup, SETUP_PWM_DOWNTIME, NOT_USED),
1857 #endif
1858 };
1859
1860 static const struct sensor_device_attribute_2 sda_beep_files[] = {
1861         SENSOR_ATTR_2(intrusion0_beep, S_IWUSR | S_IRUGO, show_alarm_beep,
1862                       store_beep, BEEP_ENABLE, 46),
1863         SENSOR_ATTR_2(beep_enable, S_IWUSR | S_IRUGO, show_alarm_beep,
1864                       store_beep, BEEP_ENABLE, 47),
1865 };
1866
1867 /*
1868  * Driver interface
1869  */
1870
1871 static void w83795_init_client(struct i2c_client *client)
1872 {
1873         struct w83795_data *data = i2c_get_clientdata(client);
1874         static const u16 clkin[4] = {   /* in kHz */
1875                 14318, 24000, 33333, 48000
1876         };
1877         u8 config;
1878
1879         if (reset)
1880                 w83795_write(client, W83795_REG_CONFIG, 0x80);
1881
1882         /* Start monitoring if needed */
1883         config = w83795_read(client, W83795_REG_CONFIG);
1884         if (!(config & W83795_REG_CONFIG_START)) {
1885                 dev_info(&client->dev, "Enabling monitoring operations\n");
1886                 w83795_write(client, W83795_REG_CONFIG,
1887                              config | W83795_REG_CONFIG_START);
1888         }
1889
1890         data->clkin = clkin[(config >> 3) & 0x3];
1891         dev_dbg(&client->dev, "clkin = %u kHz\n", data->clkin);
1892 }
1893
1894 static int w83795_get_device_id(struct i2c_client *client)
1895 {
1896         int device_id;
1897
1898         device_id = i2c_smbus_read_byte_data(client, W83795_REG_DEVICEID);
1899
1900         /*
1901          * Special case for rev. A chips; can't be checked first because later
1902          * revisions emulate this for compatibility
1903          */
1904         if (device_id < 0 || (device_id & 0xf0) != 0x50) {
1905                 int alt_id;
1906
1907                 alt_id = i2c_smbus_read_byte_data(client,
1908                                                   W83795_REG_DEVICEID_A);
1909                 if (alt_id == 0x50)
1910                         device_id = alt_id;
1911         }
1912
1913         return device_id;
1914 }
1915
1916 /* Return 0 if detection is successful, -ENODEV otherwise */
1917 static int w83795_detect(struct i2c_client *client,
1918                          struct i2c_board_info *info)
1919 {
1920         int bank, vendor_id, device_id, expected, i2c_addr, config;
1921         struct i2c_adapter *adapter = client->adapter;
1922         unsigned short address = client->addr;
1923         const char *chip_name;
1924
1925         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1926                 return -ENODEV;
1927         bank = i2c_smbus_read_byte_data(client, W83795_REG_BANKSEL);
1928         if (bank < 0 || (bank & 0x7c)) {
1929                 dev_dbg(&adapter->dev,
1930                         "w83795: Detection failed at addr 0x%02hx, check %s\n",
1931                         address, "bank");
1932                 return -ENODEV;
1933         }
1934
1935         /* Check Nuvoton vendor ID */
1936         vendor_id = i2c_smbus_read_byte_data(client, W83795_REG_VENDORID);
1937         expected = bank & 0x80 ? 0x5c : 0xa3;
1938         if (vendor_id != expected) {
1939                 dev_dbg(&adapter->dev,
1940                         "w83795: Detection failed at addr 0x%02hx, check %s\n",
1941                         address, "vendor id");
1942                 return -ENODEV;
1943         }
1944
1945         /* Check device ID */
1946         device_id = w83795_get_device_id(client) |
1947                     (i2c_smbus_read_byte_data(client, W83795_REG_CHIPID) << 8);
1948         if ((device_id >> 4) != 0x795) {
1949                 dev_dbg(&adapter->dev,
1950                         "w83795: Detection failed at addr 0x%02hx, check %s\n",
1951                         address, "device id\n");
1952                 return -ENODEV;
1953         }
1954
1955         /*
1956          * If Nuvoton chip, address of chip and W83795_REG_I2C_ADDR
1957          * should match
1958          */
1959         if ((bank & 0x07) == 0) {
1960                 i2c_addr = i2c_smbus_read_byte_data(client,
1961                                                     W83795_REG_I2C_ADDR);
1962                 if ((i2c_addr & 0x7f) != address) {
1963                         dev_dbg(&adapter->dev,
1964                                 "w83795: Detection failed at addr 0x%02hx, "
1965                                 "check %s\n", address, "i2c addr");
1966                         return -ENODEV;
1967                 }
1968         }
1969
1970         /*
1971          * Check 795 chip type: 795G or 795ADG
1972          * Usually we don't write to chips during detection, but here we don't
1973          * quite have the choice; hopefully it's OK, we are about to return
1974          * success anyway
1975          */
1976         if ((bank & 0x07) != 0)
1977                 i2c_smbus_write_byte_data(client, W83795_REG_BANKSEL,
1978                                           bank & ~0x07);
1979         config = i2c_smbus_read_byte_data(client, W83795_REG_CONFIG);
1980         if (config & W83795_REG_CONFIG_CONFIG48)
1981                 chip_name = "w83795adg";
1982         else
1983                 chip_name = "w83795g";
1984
1985         strlcpy(info->type, chip_name, I2C_NAME_SIZE);
1986         dev_info(&adapter->dev, "Found %s rev. %c at 0x%02hx\n", chip_name,
1987                  'A' + (device_id & 0xf), address);
1988
1989         return 0;
1990 }
1991
1992 #ifdef CONFIG_SENSORS_W83795_FANCTRL
1993 #define NUM_PWM_ATTRIBUTES      ARRAY_SIZE(w83795_pwm[0])
1994 #define NUM_TEMP_ATTRIBUTES     ARRAY_SIZE(w83795_temp[0])
1995 #else
1996 #define NUM_PWM_ATTRIBUTES      4
1997 #define NUM_TEMP_ATTRIBUTES     8
1998 #endif
1999
2000 static int w83795_handle_files(struct device *dev, int (*fn)(struct device *,
2001                                const struct device_attribute *))
2002 {
2003         struct w83795_data *data = dev_get_drvdata(dev);
2004         int err, i, j;
2005
2006         for (i = 0; i < ARRAY_SIZE(w83795_in); i++) {
2007                 if (!(data->has_in & (1 << i)))
2008                         continue;
2009                 for (j = 0; j < ARRAY_SIZE(w83795_in[0]); j++) {
2010                         if (j == 4 && !data->enable_beep)
2011                                 continue;
2012                         err = fn(dev, &w83795_in[i][j].dev_attr);
2013                         if (err)
2014                                 return err;
2015                 }
2016         }
2017
2018         for (i = 0; i < ARRAY_SIZE(w83795_fan); i++) {
2019                 if (!(data->has_fan & (1 << i)))
2020                         continue;
2021                 for (j = 0; j < ARRAY_SIZE(w83795_fan[0]); j++) {
2022                         if (j == 3 && !data->enable_beep)
2023                                 continue;
2024                         err = fn(dev, &w83795_fan[i][j].dev_attr);
2025                         if (err)
2026                                 return err;
2027                 }
2028         }
2029
2030         for (i = 0; i < ARRAY_SIZE(w83795_tss); i++) {
2031                 j = w83795_tss_useful(data, i);
2032                 if (!j)
2033                         continue;
2034                 err = fn(dev, &w83795_tss[i].dev_attr);
2035                 if (err)
2036                         return err;
2037         }
2038
2039         for (i = 0; i < ARRAY_SIZE(sda_single_files); i++) {
2040                 err = fn(dev, &sda_single_files[i].dev_attr);
2041                 if (err)
2042                         return err;
2043         }
2044
2045         if (data->enable_beep) {
2046                 for (i = 0; i < ARRAY_SIZE(sda_beep_files); i++) {
2047                         err = fn(dev, &sda_beep_files[i].dev_attr);
2048                         if (err)
2049                                 return err;
2050                 }
2051         }
2052
2053         for (i = 0; i < data->has_pwm; i++) {
2054                 for (j = 0; j < NUM_PWM_ATTRIBUTES; j++) {
2055                         err = fn(dev, &w83795_pwm[i][j].dev_attr);
2056                         if (err)
2057                                 return err;
2058                 }
2059         }
2060
2061         for (i = 0; i < ARRAY_SIZE(w83795_temp); i++) {
2062                 if (!(data->has_temp & (1 << i)))
2063                         continue;
2064                 for (j = 0; j < NUM_TEMP_ATTRIBUTES; j++) {
2065                         if (j == 7 && !data->enable_beep)
2066                                 continue;
2067                         err = fn(dev, &w83795_temp[i][j].dev_attr);
2068                         if (err)
2069                                 return err;
2070                 }
2071         }
2072
2073         if (data->enable_dts) {
2074                 for (i = 0; i < ARRAY_SIZE(w83795_dts); i++) {
2075                         if (!(data->has_dts & (1 << i)))
2076                                 continue;
2077                         for (j = 0; j < ARRAY_SIZE(w83795_dts[0]); j++) {
2078                                 if (j == 7 && !data->enable_beep)
2079                                         continue;
2080                                 err = fn(dev, &w83795_dts[i][j].dev_attr);
2081                                 if (err)
2082                                         return err;
2083                         }
2084                 }
2085         }
2086
2087         return 0;
2088 }
2089
2090 /* We need a wrapper that fits in w83795_handle_files */
2091 static int device_remove_file_wrapper(struct device *dev,
2092                                       const struct device_attribute *attr)
2093 {
2094         device_remove_file(dev, attr);
2095         return 0;
2096 }
2097
2098 static void w83795_check_dynamic_in_limits(struct i2c_client *client)
2099 {
2100         struct w83795_data *data = i2c_get_clientdata(client);
2101         u8 vid_ctl;
2102         int i, err_max, err_min;
2103
2104         vid_ctl = w83795_read(client, W83795_REG_VID_CTRL);
2105
2106         /* Return immediately if VRM isn't configured */
2107         if ((vid_ctl & 0x07) == 0x00 || (vid_ctl & 0x07) == 0x07)
2108                 return;
2109
2110         data->has_dyn_in = (vid_ctl >> 3) & 0x07;
2111         for (i = 0; i < 2; i++) {
2112                 if (!(data->has_dyn_in & (1 << i)))
2113                         continue;
2114
2115                 /* Voltage limits in dynamic mode, switch to read-only */
2116                 err_max = sysfs_chmod_file(&client->dev.kobj,
2117                                            &w83795_in[i][2].dev_attr.attr,
2118                                            S_IRUGO);
2119                 err_min = sysfs_chmod_file(&client->dev.kobj,
2120                                            &w83795_in[i][3].dev_attr.attr,
2121                                            S_IRUGO);
2122                 if (err_max || err_min)
2123                         dev_warn(&client->dev, "Failed to set in%d limits "
2124                                  "read-only (%d, %d)\n", i, err_max, err_min);
2125                 else
2126                         dev_info(&client->dev, "in%d limits set dynamically "
2127                                  "from VID\n", i);
2128         }
2129 }
2130
2131 /* Check pins that can be used for either temperature or voltage monitoring */
2132 static void w83795_apply_temp_config(struct w83795_data *data, u8 config,
2133                                      int temp_chan, int in_chan)
2134 {
2135         /* config is a 2-bit value */
2136         switch (config) {
2137         case 0x2: /* Voltage monitoring */
2138                 data->has_in |= 1 << in_chan;
2139                 break;
2140         case 0x1: /* Thermal diode */
2141                 if (temp_chan >= 4)
2142                         break;
2143                 data->temp_mode |= 1 << temp_chan;
2144                 /* fall through */
2145         case 0x3: /* Thermistor */
2146                 data->has_temp |= 1 << temp_chan;
2147                 break;
2148         }
2149 }
2150
2151 static int w83795_probe(struct i2c_client *client,
2152                         const struct i2c_device_id *id)
2153 {
2154         int i;
2155         u8 tmp;
2156         struct device *dev = &client->dev;
2157         struct w83795_data *data;
2158         int err;
2159
2160         data = devm_kzalloc(dev, sizeof(struct w83795_data), GFP_KERNEL);
2161         if (!data)
2162                 return -ENOMEM;
2163
2164         i2c_set_clientdata(client, data);
2165         data->chip_type = id->driver_data;
2166         data->bank = i2c_smbus_read_byte_data(client, W83795_REG_BANKSEL);
2167         mutex_init(&data->update_lock);
2168
2169         /* Initialize the chip */
2170         w83795_init_client(client);
2171
2172         /* Check which voltages and fans are present */
2173         data->has_in = w83795_read(client, W83795_REG_VOLT_CTRL1)
2174                      | (w83795_read(client, W83795_REG_VOLT_CTRL2) << 8);
2175         data->has_fan = w83795_read(client, W83795_REG_FANIN_CTRL1)
2176                       | (w83795_read(client, W83795_REG_FANIN_CTRL2) << 8);
2177
2178         /* Check which analog temperatures and extra voltages are present */
2179         tmp = w83795_read(client, W83795_REG_TEMP_CTRL1);
2180         if (tmp & 0x20)
2181                 data->enable_dts = 1;
2182         w83795_apply_temp_config(data, (tmp >> 2) & 0x3, 5, 16);
2183         w83795_apply_temp_config(data, tmp & 0x3, 4, 15);
2184         tmp = w83795_read(client, W83795_REG_TEMP_CTRL2);
2185         w83795_apply_temp_config(data, tmp >> 6, 3, 20);
2186         w83795_apply_temp_config(data, (tmp >> 4) & 0x3, 2, 19);
2187         w83795_apply_temp_config(data, (tmp >> 2) & 0x3, 1, 18);
2188         w83795_apply_temp_config(data, tmp & 0x3, 0, 17);
2189
2190         /* Check DTS enable status */
2191         if (data->enable_dts) {
2192                 if (1 & w83795_read(client, W83795_REG_DTSC))
2193                         data->enable_dts |= 2;
2194                 data->has_dts = w83795_read(client, W83795_REG_DTSE);
2195         }
2196
2197         /* Report PECI Tbase values */
2198         if (data->enable_dts == 1) {
2199                 for (i = 0; i < 8; i++) {
2200                         if (!(data->has_dts & (1 << i)))
2201                                 continue;
2202                         tmp = w83795_read(client, W83795_REG_PECI_TBASE(i));
2203                         dev_info(&client->dev,
2204                                  "PECI agent %d Tbase temperature: %u\n",
2205                                  i + 1, (unsigned int)tmp & 0x7f);
2206                 }
2207         }
2208
2209         data->has_gain = w83795_read(client, W83795_REG_VMIGB_CTRL) & 0x0f;
2210
2211         /* pwm and smart fan */
2212         if (data->chip_type == w83795g)
2213                 data->has_pwm = 8;
2214         else
2215                 data->has_pwm = 2;
2216
2217         /* Check if BEEP pin is available */
2218         if (data->chip_type == w83795g) {
2219                 /* The W83795G has a dedicated BEEP pin */
2220                 data->enable_beep = 1;
2221         } else {
2222                 /*
2223                  * The W83795ADG has a shared pin for OVT# and BEEP, so you
2224                  * can't have both
2225                  */
2226                 tmp = w83795_read(client, W83795_REG_OVT_CFG);
2227                 if ((tmp & OVT_CFG_SEL) == 0)
2228                         data->enable_beep = 1;
2229         }
2230
2231         err = w83795_handle_files(dev, device_create_file);
2232         if (err)
2233                 goto exit_remove;
2234
2235         if (data->chip_type == w83795g)
2236                 w83795_check_dynamic_in_limits(client);
2237
2238         data->hwmon_dev = hwmon_device_register(dev);
2239         if (IS_ERR(data->hwmon_dev)) {
2240                 err = PTR_ERR(data->hwmon_dev);
2241                 goto exit_remove;
2242         }
2243
2244         return 0;
2245
2246 exit_remove:
2247         w83795_handle_files(dev, device_remove_file_wrapper);
2248         return err;
2249 }
2250
2251 static int w83795_remove(struct i2c_client *client)
2252 {
2253         struct w83795_data *data = i2c_get_clientdata(client);
2254
2255         hwmon_device_unregister(data->hwmon_dev);
2256         w83795_handle_files(&client->dev, device_remove_file_wrapper);
2257
2258         return 0;
2259 }
2260
2261
2262 static const struct i2c_device_id w83795_id[] = {
2263         { "w83795g", w83795g },
2264         { "w83795adg", w83795adg },
2265         { }
2266 };
2267 MODULE_DEVICE_TABLE(i2c, w83795_id);
2268
2269 static struct i2c_driver w83795_driver = {
2270         .driver = {
2271                    .name = "w83795",
2272         },
2273         .probe          = w83795_probe,
2274         .remove         = w83795_remove,
2275         .id_table       = w83795_id,
2276
2277         .class          = I2C_CLASS_HWMON,
2278         .detect         = w83795_detect,
2279         .address_list   = normal_i2c,
2280 };
2281
2282 module_i2c_driver(w83795_driver);
2283
2284 MODULE_AUTHOR("Wei Song, Jean Delvare <khali@linux-fr.org>");
2285 MODULE_DESCRIPTION("W83795G/ADG hardware monitoring driver");
2286 MODULE_LICENSE("GPL");