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 #include <linux/jiffies.h>
  39
  40 /* Addresses to scan */
  41 static const unsigned short normal_i2c[] = {
  42         0x2c, 0x2d, 0x2e, 0x2f, I2C_CLIENT_END
  43 };
  44
  45
  46 static bool reset;
  47 module_param(reset, bool, 0);
  48 MODULE_PARM_DESC(reset, "Set to 1 to reset chip, not recommended");
  49
  50
  51 #define W83795_REG_BANKSEL              0x00
  52 #define W83795_REG_VENDORID             0xfd
  53 #define W83795_REG_CHIPID               0xfe
  54 #define W83795_REG_DEVICEID             0xfb
  55 #define W83795_REG_DEVICEID_A           0xff
  56
  57 #define W83795_REG_I2C_ADDR             0xfc
  58 #define W83795_REG_CONFIG               0x01
  59 #define W83795_REG_CONFIG_CONFIG48      0x04
  60 #define W83795_REG_CONFIG_START 0x01
  61
  62 /* Multi-Function Pin Ctrl Registers */
  63 #define W83795_REG_VOLT_CTRL1           0x02
  64 #define W83795_REG_VOLT_CTRL2           0x03
  65 #define W83795_REG_TEMP_CTRL1           0x04
  66 #define W83795_REG_TEMP_CTRL2           0x05
  67 #define W83795_REG_FANIN_CTRL1          0x06
  68 #define W83795_REG_FANIN_CTRL2          0x07
  69 #define W83795_REG_VMIGB_CTRL           0x08
  70
  71 #define TEMP_READ                       0
  72 #define TEMP_CRIT                       1
  73 #define TEMP_CRIT_HYST                  2
  74 #define TEMP_WARN                       3
  75 #define TEMP_WARN_HYST                  4
  76 /*
  77  * only crit and crit_hyst affect real-time alarm status
  78  * current crit crit_hyst warn warn_hyst
  79  */
  80 static const u16 W83795_REG_TEMP[][5] = {
  81         {0x21, 0x96, 0x97, 0x98, 0x99}, /* TD1/TR1 */
  82         {0x22, 0x9a, 0x9b, 0x9c, 0x9d}, /* TD2/TR2 */
  83         {0x23, 0x9e, 0x9f, 0xa0, 0xa1}, /* TD3/TR3 */
  84         {0x24, 0xa2, 0xa3, 0xa4, 0xa5}, /* TD4/TR4 */
  85         {0x1f, 0xa6, 0xa7, 0xa8, 0xa9}, /* TR5 */
  86         {0x20, 0xaa, 0xab, 0xac, 0xad}, /* TR6 */
  87 };
  88
  89 #define IN_READ                         0
  90 #define IN_MAX                          1
  91 #define IN_LOW                          2
  92 static const u16 W83795_REG_IN[][3] = {
  93         /* Current, HL, LL */
  94         {0x10, 0x70, 0x71},     /* VSEN1 */
  95         {0x11, 0x72, 0x73},     /* VSEN2 */
  96         {0x12, 0x74, 0x75},     /* VSEN3 */
  97         {0x13, 0x76, 0x77},     /* VSEN4 */
  98         {0x14, 0x78, 0x79},     /* VSEN5 */
  99         {0x15, 0x7a, 0x7b},     /* VSEN6 */
 100         {0x16, 0x7c, 0x7d},     /* VSEN7 */
 101         {0x17, 0x7e, 0x7f},     /* VSEN8 */
 102         {0x18, 0x80, 0x81},     /* VSEN9 */
 103         {0x19, 0x82, 0x83},     /* VSEN10 */
 104         {0x1A, 0x84, 0x85},     /* VSEN11 */
 105         {0x1B, 0x86, 0x87},     /* VTT */
 106         {0x1C, 0x88, 0x89},     /* 3VDD */
 107         {0x1D, 0x8a, 0x8b},     /* 3VSB */
 108         {0x1E, 0x8c, 0x8d},     /* VBAT */
 109         {0x1F, 0xa6, 0xa7},     /* VSEN12 */
 110         {0x20, 0xaa, 0xab},     /* VSEN13 */
 111         {0x21, 0x96, 0x97},     /* VSEN14 */
 112         {0x22, 0x9a, 0x9b},     /* VSEN15 */
 113         {0x23, 0x9e, 0x9f},     /* VSEN16 */
 114         {0x24, 0xa2, 0xa3},     /* VSEN17 */
 115 };
 116 #define W83795_REG_VRLSB                0x3C
 117
 118 static const u8 W83795_REG_IN_HL_LSB[] = {
 119         0x8e,   /* VSEN1-4 */
 120         0x90,   /* VSEN5-8 */
 121         0x92,   /* VSEN9-11 */
 122         0x94,   /* VTT, 3VDD, 3VSB, 3VBAT */
 123         0xa8,   /* VSEN12 */
 124         0xac,   /* VSEN13 */
 125         0x98,   /* VSEN14 */
 126         0x9c,   /* VSEN15 */
 127         0xa0,   /* VSEN16 */
 128         0xa4,   /* VSEN17 */
 129 };
 130
 131 #define IN_LSB_REG(index, type) \
 132         (((type) == 1) ? W83795_REG_IN_HL_LSB[(index)] \
 133         : (W83795_REG_IN_HL_LSB[(index)] + 1))
 134
 135 #define IN_LSB_SHIFT                    0
 136 #define IN_LSB_IDX                      1
 137 static const u8 IN_LSB_SHIFT_IDX[][2] = {
 138         /* High/Low LSB shift, LSB No. */
 139         {0x00, 0x00},   /* VSEN1 */
 140         {0x02, 0x00},   /* VSEN2 */
 141         {0x04, 0x00},   /* VSEN3 */
 142         {0x06, 0x00},   /* VSEN4 */
 143         {0x00, 0x01},   /* VSEN5 */
 144         {0x02, 0x01},   /* VSEN6 */
 145         {0x04, 0x01},   /* VSEN7 */
 146         {0x06, 0x01},   /* VSEN8 */
 147         {0x00, 0x02},   /* VSEN9 */
 148         {0x02, 0x02},   /* VSEN10 */
 149         {0x04, 0x02},   /* VSEN11 */
 150         {0x00, 0x03},   /* VTT */
 151         {0x02, 0x03},   /* 3VDD */
 152         {0x04, 0x03},   /* 3VSB */
 153         {0x06, 0x03},   /* VBAT */
 154         {0x06, 0x04},   /* VSEN12 */
 155         {0x06, 0x05},   /* VSEN13 */
 156         {0x06, 0x06},   /* VSEN14 */
 157         {0x06, 0x07},   /* VSEN15 */
 158         {0x06, 0x08},   /* VSEN16 */
 159         {0x06, 0x09},   /* VSEN17 */
 160 };
 161
 162
 163 #define W83795_REG_FAN(index)           (0x2E + (index))
 164 #define W83795_REG_FAN_MIN_HL(index)    (0xB6 + (index))
 165 #define W83795_REG_FAN_MIN_LSB(index)   (0xC4 + (index) / 2)
 166 #define W83795_REG_FAN_MIN_LSB_SHIFT(index) \
 167         (((index) & 1) ? 4 : 0)
 168
 169 #define W83795_REG_VID_CTRL             0x6A
 170
 171 #define W83795_REG_ALARM_CTRL           0x40
 172 #define ALARM_CTRL_RTSACS               (1 << 7)
 173 #define W83795_REG_ALARM(index)         (0x41 + (index))
 174 #define W83795_REG_CLR_CHASSIS          0x4D
 175 #define W83795_REG_BEEP(index)          (0x50 + (index))
 176
 177 #define W83795_REG_OVT_CFG              0x58
 178 #define OVT_CFG_SEL                     (1 << 7)
 179
 180
 181 #define W83795_REG_FCMS1                0x201
 182 #define W83795_REG_FCMS2                0x208
 183 #define W83795_REG_TFMR(index)          (0x202 + (index))
 184 #define W83795_REG_FOMC                 0x20F
 185
 186 #define W83795_REG_TSS(index)           (0x209 + (index))
 187
 188 #define TSS_MAP_RESERVED                0xff
 189 static const u8 tss_map[4][6] = {
 190         { 0,  1,  2,  3,  4,  5},
 191         { 6,  7,  8,  9,  0,  1},
 192         {10, 11, 12, 13,  2,  3},
 193         { 4,  5,  4,  5, TSS_MAP_RESERVED, TSS_MAP_RESERVED},
 194 };
 195
 196 #define PWM_OUTPUT                      0
 197 #define PWM_FREQ                        1
 198 #define PWM_START                       2
 199 #define PWM_NONSTOP                     3
 200 #define PWM_STOP_TIME                   4
 201 #define W83795_REG_PWM(index, nr)       (0x210 + (nr) * 8 + (index))
 202
 203 #define W83795_REG_FTSH(index)          (0x240 + (index) * 2)
 204 #define W83795_REG_FTSL(index)          (0x241 + (index) * 2)
 205 #define W83795_REG_TFTS                 0x250
 206
 207 #define TEMP_PWM_TTTI                   0
 208 #define TEMP_PWM_CTFS                   1
 209 #define TEMP_PWM_HCT                    2
 210 #define TEMP_PWM_HOT                    3
 211 #define W83795_REG_TTTI(index)          (0x260 + (index))
 212 #define W83795_REG_CTFS(index)          (0x268 + (index))
 213 #define W83795_REG_HT(index)            (0x270 + (index))
 214
 215 #define SF4_TEMP                        0
 216 #define SF4_PWM                         1
 217 #define W83795_REG_SF4_TEMP(temp_num, index) \
 218         (0x280 + 0x10 * (temp_num) + (index))
 219 #define W83795_REG_SF4_PWM(temp_num, index) \
 220         (0x288 + 0x10 * (temp_num) + (index))
 221
 222 #define W83795_REG_DTSC                 0x301
 223 #define W83795_REG_DTSE                 0x302
 224 #define W83795_REG_DTS(index)           (0x26 + (index))
 225 #define W83795_REG_PECI_TBASE(index)    (0x320 + (index))
 226
 227 #define DTS_CRIT                        0
 228 #define DTS_CRIT_HYST                   1
 229 #define DTS_WARN                        2
 230 #define DTS_WARN_HYST                   3
 231 #define W83795_REG_DTS_EXT(index)       (0xB2 + (index))
 232
 233 #define SETUP_PWM_DEFAULT               0
 234 #define SETUP_PWM_UPTIME                1
 235 #define SETUP_PWM_DOWNTIME              2
 236 #define W83795_REG_SETUP_PWM(index)    (0x20C + (index))
 237
 238 static inline u16 in_from_reg(u8 index, u16 val)
 239 {
 240         /* 3VDD, 3VSB and VBAT: 6 mV/bit; other inputs: 2 mV/bit */
 241         if (index >= 12 && index <= 14)
 242                 return val * 6;
 243         else
 244                 return val * 2;
 245 }
 246
 247 static inline u16 in_to_reg(u8 index, u16 val)
 248 {
 249         if (index >= 12 && index <= 14)
 250                 return val / 6;
 251         else
 252                 return val / 2;
 253 }
 254
 255 static inline unsigned long fan_from_reg(u16 val)
 256 {
 257         if ((val == 0xfff) || (val == 0))
 258                 return 0;
 259         return 1350000UL / val;
 260 }
 261
 262 static inline u16 fan_to_reg(long rpm)
 263 {
 264         if (rpm <= 0)
 265                 return 0x0fff;
 266         return SENSORS_LIMIT((1350000 + (rpm >> 1)) / rpm, 1, 0xffe);
 267 }
 268
 269 static inline unsigned long time_from_reg(u8 reg)
 270 {
 271         return reg * 100;
 272 }
 273
 274 static inline u8 time_to_reg(unsigned long val)
 275 {
 276         return SENSORS_LIMIT((val + 50) / 100, 0, 0xff);
 277 }
 278
 279 static inline long temp_from_reg(s8 reg)
 280 {
 281         return reg * 1000;
 282 }
 283
 284 static inline s8 temp_to_reg(long val, s8 min, s8 max)
 285 {
 286         return SENSORS_LIMIT(val / 1000, min, max);
 287 }
 288
 289 static const u16 pwm_freq_cksel0[16] = {
 290         1024, 512, 341, 256, 205, 171, 146, 128,
 291         85, 64, 32, 16, 8, 4, 2, 1
 292 };
 293
 294 static unsigned int pwm_freq_from_reg(u8 reg, u16 clkin)
 295 {
 296         unsigned long base_clock;
 297
 298         if (reg & 0x80) {
 299                 base_clock = clkin * 1000 / ((clkin == 48000) ? 384 : 256);
 300                 return base_clock / ((reg & 0x7f) + 1);
 301         } else
 302                 return pwm_freq_cksel0[reg & 0x0f];
 303 }
 304
 305 static u8 pwm_freq_to_reg(unsigned long val, u16 clkin)
 306 {
 307         unsigned long base_clock;
 308         u8 reg0, reg1;
 309         unsigned long best0, best1;
 310
 311         /* Best fit for cksel = 0 */
 312         for (reg0 = 0; reg0 < ARRAY_SIZE(pwm_freq_cksel0) - 1; reg0++) {
 313                 if (val > (pwm_freq_cksel0[reg0] +
 314                            pwm_freq_cksel0[reg0 + 1]) / 2)
 315                         break;
 316         }
 317         if (val < 375)  /* cksel = 1 can't beat this */
 318                 return reg0;
 319         best0 = pwm_freq_cksel0[reg0];
 320
 321         /* Best fit for cksel = 1 */
 322         base_clock = clkin * 1000 / ((clkin == 48000) ? 384 : 256);
 323         reg1 = SENSORS_LIMIT(DIV_ROUND_CLOSEST(base_clock, val), 1, 128);
 324         best1 = base_clock / reg1;
 325         reg1 = 0x80 | (reg1 - 1);
 326
 327         /* Choose the closest one */
 328         if (abs(val - best0) > abs(val - best1))
 329                 return reg1;
 330         else
 331                 return reg0;
 332 }
 333
 334 enum chip_types {w83795g, w83795adg};
 335
 336 struct w83795_data {
 337         struct device *hwmon_dev;
 338         struct mutex update_lock;
 339         unsigned long last_updated;     /* In jiffies */
 340         enum chip_types chip_type;
 341
 342         u8 bank;
 343
 344         u32 has_in;             /* Enable monitor VIN or not */
 345         u8 has_dyn_in;          /* Only in2-0 can have this */
 346         u16 in[21][3];          /* Register value, read/high/low */
 347         u8 in_lsb[10][3];       /* LSB Register value, high/low */
 348         u8 has_gain;            /* has gain: in17-20 * 8 */
 349
 350         u16 has_fan;            /* Enable fan14-1 or not */
 351         u16 fan[14];            /* Register value combine */
 352         u16 fan_min[14];        /* Register value combine */
 353
 354         u8 has_temp;            /* Enable monitor temp6-1 or not */
 355         s8 temp[6][5];          /* current, crit, crit_hyst, warn, warn_hyst */
 356         u8 temp_read_vrlsb[6];
 357         u8 temp_mode;           /* Bit vector, 0 = TR, 1 = TD */
 358         u8 temp_src[3];         /* Register value */
 359
 360         u8 enable_dts;          /*
 361                                  * Enable PECI and SB-TSI,
 362                                  * bit 0: =1 enable, =0 disable,
 363                                  * bit 1: =1 AMD SB-TSI, =0 Intel PECI
 364                                  */
 365         u8 has_dts;             /* Enable monitor DTS temp */
 366         s8 dts[8];              /* Register value */
 367         u8 dts_read_vrlsb[8];   /* Register value */
 368         s8 dts_ext[4];          /* Register value */
 369
 370         u8 has_pwm;             /*
 371                                  * 795g supports 8 pwm, 795adg only supports 2,
 372                                  * no config register, only affected by chip
 373                                  * type
 374                                  */
 375         u8 pwm[8][5];           /*
 376                                  * Register value, output, freq, start,
 377                                  *  non stop, stop time
 378                                  */
 379         u16 clkin;              /* CLKIN frequency in kHz */
 380         u8 pwm_fcms[2];         /* Register value */
 381         u8 pwm_tfmr[6];         /* Register value */
 382         u8 pwm_fomc;            /* Register value */
 383
 384         u16 target_speed[8];    /*
 385                                  * Register value, target speed for speed
 386                                  * cruise
 387                                  */
 388         u8 tol_speed;           /* tolerance of target speed */
 389         u8 pwm_temp[6][4];      /* TTTI, CTFS, HCT, HOT */
 390         u8 sf4_reg[6][2][7];    /* 6 temp, temp/dcpwm, 7 registers */
 391
 392         u8 setup_pwm[3];        /* Register value */
 393
 394         u8 alarms[6];           /* Register value */
 395         u8 enable_beep;
 396         u8 beeps[6];            /* Register value */
 397
 398         char valid;
 399         char valid_limits;
 400         char valid_pwm_config;
 401 };
 402
 403 /*
 404  * Hardware access
 405  * We assume that nobdody can change the bank outside the driver.
 406  */
 407
 408 /* Must be called with data->update_lock held, except during initialization */
 409 static int w83795_set_bank(struct i2c_client *client, u8 bank)
 410 {
 411         struct w83795_data *data = i2c_get_clientdata(client);
 412         int err;
 413
 414         /* If the same bank is already set, nothing to do */
 415         if ((data->bank & 0x07) == bank)
 416                 return 0;
 417
 418         /* Change to new bank, preserve all other bits */
 419         bank |= data->bank & ~0x07;
 420         err = i2c_smbus_write_byte_data(client, W83795_REG_BANKSEL, bank);
 421         if (err < 0) {
 422                 dev_err(&client->dev,
 423                         "Failed to set bank to %d, err %d\n",
 424                         (int)bank, err);
 425                 return err;
 426         }
 427         data->bank = bank;
 428
 429         return 0;
 430 }
 431
 432 /* Must be called with data->update_lock held, except during initialization */
 433 static u8 w83795_read(struct i2c_client *client, u16 reg)
 434 {
 435         int err;
 436
 437         err = w83795_set_bank(client, reg >> 8);
 438         if (err < 0)
 439                 return 0x00;    /* Arbitrary */
 440
 441         err = i2c_smbus_read_byte_data(client, reg & 0xff);
 442         if (err < 0) {
 443                 dev_err(&client->dev,
 444                         "Failed to read from register 0x%03x, err %d\n",
 445                         (int)reg, err);
 446                 return 0x00;    /* Arbitrary */
 447         }
 448         return err;
 449 }
 450
 451 /* Must be called with data->update_lock held, except during initialization */
 452 static int w83795_write(struct i2c_client *client, u16 reg, u8 value)
 453 {
 454         int err;
 455
 456         err = w83795_set_bank(client, reg >> 8);
 457         if (err < 0)
 458                 return err;
 459
 460         err = i2c_smbus_write_byte_data(client, reg & 0xff, value);
 461         if (err < 0)
 462                 dev_err(&client->dev,
 463                         "Failed to write to register 0x%03x, err %d\n",
 464                         (int)reg, err);
 465         return err;
 466 }
 467
 468 static void w83795_update_limits(struct i2c_client *client)
 469 {
 470         struct w83795_data *data = i2c_get_clientdata(client);
 471         int i, limit;
 472         u8 lsb;
 473
 474         /* Read the voltage limits */
 475         for (i = 0; i < ARRAY_SIZE(data->in); i++) {
 476                 if (!(data->has_in & (1 << i)))
 477                         continue;
 478                 data->in[i][IN_MAX] =
 479                         w83795_read(client, W83795_REG_IN[i][IN_MAX]);
 480                 data->in[i][IN_LOW] =
 481                         w83795_read(client, W83795_REG_IN[i][IN_LOW]);
 482         }
 483         for (i = 0; i < ARRAY_SIZE(data->in_lsb); i++) {
 484                 if ((i == 2 && data->chip_type == w83795adg) ||
 485                     (i >= 4 && !(data->has_in & (1 << (i + 11)))))
 486                         continue;
 487                 data->in_lsb[i][IN_MAX] =
 488                         w83795_read(client, IN_LSB_REG(i, IN_MAX));
 489                 data->in_lsb[i][IN_LOW] =
 490                         w83795_read(client, IN_LSB_REG(i, IN_LOW));
 491         }
 492
 493         /* Read the fan limits */
 494         lsb = 0; /* Silent false gcc warning */
 495         for (i = 0; i < ARRAY_SIZE(data->fan); i++) {
 496                 /*
 497                  * Each register contains LSB for 2 fans, but we want to
 498                  * read it only once to save time
 499                  */
 500                 if ((i & 1) == 0 && (data->has_fan & (3 << i)))
 501                         lsb = w83795_read(client, W83795_REG_FAN_MIN_LSB(i));
 502
 503                 if (!(data->has_fan & (1 << i)))
 504                         continue;
 505                 data->fan_min[i] =
 506                         w83795_read(client, W83795_REG_FAN_MIN_HL(i)) << 4;
 507                 data->fan_min[i] |=
 508                         (lsb >> W83795_REG_FAN_MIN_LSB_SHIFT(i)) & 0x0F;
 509         }
 510
 511         /* Read the temperature limits */
 512         for (i = 0; i < ARRAY_SIZE(data->temp); i++) {
 513                 if (!(data->has_temp & (1 << i)))
 514                         continue;
 515                 for (limit = TEMP_CRIT; limit <= TEMP_WARN_HYST; limit++)
 516                         data->temp[i][limit] =
 517                                 w83795_read(client, W83795_REG_TEMP[i][limit]);
 518         }
 519
 520         /* Read the DTS limits */
 521         if (data->enable_dts) {
 522                 for (limit = DTS_CRIT; limit <= DTS_WARN_HYST; limit++)
 523                         data->dts_ext[limit] =
 524                                 w83795_read(client, W83795_REG_DTS_EXT(limit));
 525         }
 526
 527         /* Read beep settings */
 528         if (data->enable_beep) {
 529                 for (i = 0; i < ARRAY_SIZE(data->beeps); i++)
 530                         data->beeps[i] =
 531                                 w83795_read(client, W83795_REG_BEEP(i));
 532         }
 533
 534         data->valid_limits = 1;
 535 }
 536
 537 static struct w83795_data *w83795_update_pwm_config(struct device *dev)
 538 {
 539         struct i2c_client *client = to_i2c_client(dev);
 540         struct w83795_data *data = i2c_get_clientdata(client);
 541         int i, tmp;
 542
 543         mutex_lock(&data->update_lock);
 544
 545         if (data->valid_pwm_config)
 546                 goto END;
 547
 548         /* Read temperature source selection */
 549         for (i = 0; i < ARRAY_SIZE(data->temp_src); i++)
 550                 data->temp_src[i] = w83795_read(client, W83795_REG_TSS(i));
 551
 552         /* Read automatic fan speed control settings */
 553         data->pwm_fcms[0] = w83795_read(client, W83795_REG_FCMS1);
 554         data->pwm_fcms[1] = w83795_read(client, W83795_REG_FCMS2);
 555         for (i = 0; i < ARRAY_SIZE(data->pwm_tfmr); i++)
 556                 data->pwm_tfmr[i] = w83795_read(client, W83795_REG_TFMR(i));
 557         data->pwm_fomc = w83795_read(client, W83795_REG_FOMC);
 558         for (i = 0; i < data->has_pwm; i++) {
 559                 for (tmp = PWM_FREQ; tmp <= PWM_STOP_TIME; tmp++)
 560                         data->pwm[i][tmp] =
 561                                 w83795_read(client, W83795_REG_PWM(i, tmp));
 562         }
 563         for (i = 0; i < ARRAY_SIZE(data->target_speed); i++) {
 564                 data->target_speed[i] =
 565                         w83795_read(client, W83795_REG_FTSH(i)) << 4;
 566                 data->target_speed[i] |=
 567                         w83795_read(client, W83795_REG_FTSL(i)) >> 4;
 568         }
 569         data->tol_speed = w83795_read(client, W83795_REG_TFTS) & 0x3f;
 570
 571         for (i = 0; i < ARRAY_SIZE(data->pwm_temp); i++) {
 572                 data->pwm_temp[i][TEMP_PWM_TTTI] =
 573                         w83795_read(client, W83795_REG_TTTI(i)) & 0x7f;
 574                 data->pwm_temp[i][TEMP_PWM_CTFS] =
 575                         w83795_read(client, W83795_REG_CTFS(i));
 576                 tmp = w83795_read(client, W83795_REG_HT(i));
 577                 data->pwm_temp[i][TEMP_PWM_HCT] = tmp >> 4;
 578                 data->pwm_temp[i][TEMP_PWM_HOT] = tmp & 0x0f;
 579         }
 580
 581         /* Read SmartFanIV trip points */
 582         for (i = 0; i < ARRAY_SIZE(data->sf4_reg); i++) {
 583                 for (tmp = 0; tmp < 7; tmp++) {
 584                         data->sf4_reg[i][SF4_TEMP][tmp] =
 585                                 w83795_read(client,
 586                                             W83795_REG_SF4_TEMP(i, tmp));
 587                         data->sf4_reg[i][SF4_PWM][tmp] =
 588                                 w83795_read(client, W83795_REG_SF4_PWM(i, tmp));
 589                 }
 590         }
 591
 592         /* Read setup PWM */
 593         for (i = 0; i < ARRAY_SIZE(data->setup_pwm); i++)
 594                 data->setup_pwm[i] =
 595                         w83795_read(client, W83795_REG_SETUP_PWM(i));
 596
 597         data->valid_pwm_config = 1;
 598
 599 END:
 600         mutex_unlock(&data->update_lock);
 601         return data;
 602 }
 603
 604 static struct w83795_data *w83795_update_device(struct device *dev)
 605 {
 606         struct i2c_client *client = to_i2c_client(dev);
 607         struct w83795_data *data = i2c_get_clientdata(client);
 608         u16 tmp;
 609         u8 intrusion;
 610         int i;
 611
 612         mutex_lock(&data->update_lock);
 613
 614         if (!data->valid_limits)
 615                 w83795_update_limits(client);
 616
 617         if (!(time_after(jiffies, data->last_updated + HZ * 2)
 618               || !data->valid))
 619                 goto END;
 620
 621         /* Update the voltages value */
 622         for (i = 0; i < ARRAY_SIZE(data->in); i++) {
 623                 if (!(data->has_in & (1 << i)))
 624                         continue;
 625                 tmp = w83795_read(client, W83795_REG_IN[i][IN_READ]) << 2;
 626                 tmp |= w83795_read(client, W83795_REG_VRLSB) >> 6;
 627                 data->in[i][IN_READ] = tmp;
 628         }
 629
 630         /* in0-2 can have dynamic limits (W83795G only) */
 631         if (data->has_dyn_in) {
 632                 u8 lsb_max = w83795_read(client, IN_LSB_REG(0, IN_MAX));
 633                 u8 lsb_low = w83795_read(client, IN_LSB_REG(0, IN_LOW));
 634
 635                 for (i = 0; i < 3; i++) {
 636                         if (!(data->has_dyn_in & (1 << i)))
 637                                 continue;
 638                         data->in[i][IN_MAX] =
 639                                 w83795_read(client, W83795_REG_IN[i][IN_MAX]);
 640                         data->in[i][IN_LOW] =
 641                                 w83795_read(client, W83795_REG_IN[i][IN_LOW]);
 642                         data->in_lsb[i][IN_MAX] = (lsb_max >> (2 * i)) & 0x03;
 643                         data->in_lsb[i][IN_LOW] = (lsb_low >> (2 * i)) & 0x03;
 644                 }
 645         }
 646
 647         /* Update fan */
 648         for (i = 0; i < ARRAY_SIZE(data->fan); i++) {
 649                 if (!(data->has_fan & (1 << i)))
 650                         continue;
 651                 data->fan[i] = w83795_read(client, W83795_REG_FAN(i)) << 4;
 652                 data->fan[i] |= w83795_read(client, W83795_REG_VRLSB) >> 4;
 653         }
 654
 655         /* Update temperature */
 656         for (i = 0; i < ARRAY_SIZE(data->temp); i++) {
 657                 data->temp[i][TEMP_READ] =
 658                         w83795_read(client, W83795_REG_TEMP[i][TEMP_READ]);
 659                 data->temp_read_vrlsb[i] =
 660                         w83795_read(client, W83795_REG_VRLSB);
 661         }
 662
 663         /* Update dts temperature */
 664         if (data->enable_dts) {
 665                 for (i = 0; i < ARRAY_SIZE(data->dts); i++) {
 666                         if (!(data->has_dts & (1 << i)))
 667                                 continue;
 668                         data->dts[i] =
 669                                 w83795_read(client, W83795_REG_DTS(i));
 670                         data->dts_read_vrlsb[i] =
 671                                 w83795_read(client, W83795_REG_VRLSB);
 672                 }
 673         }
 674
 675         /* Update pwm output */
 676         for (i = 0; i < data->has_pwm; i++) {
 677                 data->pwm[i][PWM_OUTPUT] =
 678                     w83795_read(client, W83795_REG_PWM(i, PWM_OUTPUT));
 679         }
 680
 681         /*
 682          * Update intrusion and alarms
 683          * It is important to read intrusion first, because reading from
 684          * register SMI STS6 clears the interrupt status temporarily.
 685          */
 686         tmp = w83795_read(client, W83795_REG_ALARM_CTRL);
 687         /* Switch to interrupt status for intrusion if needed */
 688         if (tmp & ALARM_CTRL_RTSACS)
 689                 w83795_write(client, W83795_REG_ALARM_CTRL,
 690                              tmp & ~ALARM_CTRL_RTSACS);
 691         intrusion = w83795_read(client, W83795_REG_ALARM(5)) & (1 << 6);
 692         /* Switch to real-time alarms */
 693         w83795_write(client, W83795_REG_ALARM_CTRL, tmp | ALARM_CTRL_RTSACS);
 694         for (i = 0; i < ARRAY_SIZE(data->alarms); i++)
 695                 data->alarms[i] = w83795_read(client, W83795_REG_ALARM(i));
 696         data->alarms[5] |= intrusion;
 697         /* Restore original configuration if needed */
 698         if (!(tmp & ALARM_CTRL_RTSACS))
 699                 w83795_write(client, W83795_REG_ALARM_CTRL,
 700                              tmp & ~ALARM_CTRL_RTSACS);
 701
 702         data->last_updated = jiffies;
 703         data->valid = 1;
 704
 705 END:
 706         mutex_unlock(&data->update_lock);
 707         return data;
 708 }
 709
 710 /*
 711  * Sysfs attributes
 712  */
 713
 714 #define ALARM_STATUS      0
 715 #define BEEP_ENABLE       1
 716 static ssize_t
 717 show_alarm_beep(struct device *dev, struct device_attribute *attr, char *buf)
 718 {
 719         struct w83795_data *data = w83795_update_device(dev);
 720         struct sensor_device_attribute_2 *sensor_attr =
 721             to_sensor_dev_attr_2(attr);
 722         int nr = sensor_attr->nr;
 723         int index = sensor_attr->index >> 3;
 724         int bit = sensor_attr->index & 0x07;
 725         u8 val;
 726
 727         if (nr == ALARM_STATUS)
 728                 val = (data->alarms[index] >> bit) & 1;
 729         else            /* BEEP_ENABLE */
 730                 val = (data->beeps[index] >> bit) & 1;
 731
 732         return sprintf(buf, "%u\n", val);
 733 }
 734
 735 static ssize_t
 736 store_beep(struct device *dev, struct device_attribute *attr,
 737            const char *buf, size_t count)
 738 {
 739         struct i2c_client *client = to_i2c_client(dev);
 740         struct w83795_data *data = i2c_get_clientdata(client);
 741         struct sensor_device_attribute_2 *sensor_attr =
 742             to_sensor_dev_attr_2(attr);
 743         int index = sensor_attr->index >> 3;
 744         int shift = sensor_attr->index & 0x07;
 745         u8 beep_bit = 1 << shift;
 746         unsigned long val;
 747
 748         if (kstrtoul(buf, 10, &val) < 0)
 749                 return -EINVAL;
 750         if (val != 0 && val != 1)
 751                 return -EINVAL;
 752
 753         mutex_lock(&data->update_lock);
 754         data->beeps[index] = w83795_read(client, W83795_REG_BEEP(index));
 755         data->beeps[index] &= ~beep_bit;
 756         data->beeps[index] |= val << shift;
 757         w83795_write(client, W83795_REG_BEEP(index), data->beeps[index]);
 758         mutex_unlock(&data->update_lock);
 759
 760         return count;
 761 }
 762
 763 /* Write 0 to clear chassis alarm */
 764 static ssize_t
 765 store_chassis_clear(struct device *dev,
 766                     struct device_attribute *attr, const char *buf,
 767                     size_t count)
 768 {
 769         struct i2c_client *client = to_i2c_client(dev);
 770         struct w83795_data *data = i2c_get_clientdata(client);
 771         unsigned long val;
 772
 773         if (kstrtoul(buf, 10, &val) < 0 || val != 0)
 774                 return -EINVAL;
 775
 776         mutex_lock(&data->update_lock);
 777         val = w83795_read(client, W83795_REG_CLR_CHASSIS);
 778         val |= 0x80;
 779         w83795_write(client, W83795_REG_CLR_CHASSIS, val);
 780
 781         /* Clear status and force cache refresh */
 782         w83795_read(client, W83795_REG_ALARM(5));
 783         data->valid = 0;
 784         mutex_unlock(&data->update_lock);
 785         return count;
 786 }
 787
 788 #define FAN_INPUT     0
 789 #define FAN_MIN       1
 790 static ssize_t
 791 show_fan(struct device *dev, struct device_attribute *attr, char *buf)
 792 {
 793         struct sensor_device_attribute_2 *sensor_attr =
 794             to_sensor_dev_attr_2(attr);
 795         int nr = sensor_attr->nr;
 796         int index = sensor_attr->index;
 797         struct w83795_data *data = w83795_update_device(dev);
 798         u16 val;
 799
 800         if (nr == FAN_INPUT)
 801                 val = data->fan[index] & 0x0fff;
 802         else
 803                 val = data->fan_min[index] & 0x0fff;
 804
 805         return sprintf(buf, "%lu\n", fan_from_reg(val));
 806 }
 807
 808 static ssize_t
 809 store_fan_min(struct device *dev, struct device_attribute *attr,
 810               const char *buf, size_t count)
 811 {
 812         struct sensor_device_attribute_2 *sensor_attr =
 813             to_sensor_dev_attr_2(attr);
 814         int index = sensor_attr->index;
 815         struct i2c_client *client = to_i2c_client(dev);
 816         struct w83795_data *data = i2c_get_clientdata(client);
 817         unsigned long val;
 818
 819         if (kstrtoul(buf, 10, &val))
 820                 return -EINVAL;
 821         val = fan_to_reg(val);
 822
 823         mutex_lock(&data->update_lock);
 824         data->fan_min[index] = val;
 825         w83795_write(client, W83795_REG_FAN_MIN_HL(index), (val >> 4) & 0xff);
 826         val &= 0x0f;
 827         if (index & 1) {
 828                 val <<= 4;
 829                 val |= w83795_read(client, W83795_REG_FAN_MIN_LSB(index))
 830                        & 0x0f;
 831         } else {
 832                 val |= w83795_read(client, W83795_REG_FAN_MIN_LSB(index))
 833                        & 0xf0;
 834         }
 835         w83795_write(client, W83795_REG_FAN_MIN_LSB(index), val & 0xff);
 836         mutex_unlock(&data->update_lock);
 837
 838         return count;
 839 }
 840
 841 static ssize_t
 842 show_pwm(struct device *dev, struct device_attribute *attr, char *buf)
 843 {
 844         struct w83795_data *data;
 845         struct sensor_device_attribute_2 *sensor_attr =
 846             to_sensor_dev_attr_2(attr);
 847         int nr = sensor_attr->nr;
 848         int index = sensor_attr->index;
 849         unsigned int val;
 850
 851         data = nr == PWM_OUTPUT ? w83795_update_device(dev)
 852                                 : w83795_update_pwm_config(dev);
 853
 854         switch (nr) {
 855         case PWM_STOP_TIME:
 856                 val = time_from_reg(data->pwm[index][nr]);
 857                 break;
 858         case PWM_FREQ:
 859                 val = pwm_freq_from_reg(data->pwm[index][nr], data->clkin);
 860                 break;
 861         default:
 862                 val = data->pwm[index][nr];
 863                 break;
 864         }
 865
 866         return sprintf(buf, "%u\n", val);
 867 }
 868
 869 static ssize_t
 870 store_pwm(struct device *dev, struct device_attribute *attr,
 871           const char *buf, size_t count)
 872 {
 873         struct i2c_client *client = to_i2c_client(dev);
 874         struct w83795_data *data = i2c_get_clientdata(client);
 875         struct sensor_device_attribute_2 *sensor_attr =
 876             to_sensor_dev_attr_2(attr);
 877         int nr = sensor_attr->nr;
 878         int index = sensor_attr->index;
 879         unsigned long val;
 880
 881         if (kstrtoul(buf, 10, &val) < 0)
 882                 return -EINVAL;
 883
 884         mutex_lock(&data->update_lock);
 885         switch (nr) {
 886         case PWM_STOP_TIME:
 887                 val = time_to_reg(val);
 888                 break;
 889         case PWM_FREQ:
 890                 val = pwm_freq_to_reg(val, data->clkin);
 891                 break;
 892         default:
 893                 val = SENSORS_LIMIT(val, 0, 0xff);
 894                 break;
 895         }
 896         w83795_write(client, W83795_REG_PWM(index, nr), val);
 897         data->pwm[index][nr] = val;
 898         mutex_unlock(&data->update_lock);
 899         return count;
 900 }
 901
 902 static ssize_t
 903 show_pwm_enable(struct device *dev, struct device_attribute *attr, char *buf)
 904 {
 905         struct sensor_device_attribute_2 *sensor_attr =
 906             to_sensor_dev_attr_2(attr);
 907         struct w83795_data *data = w83795_update_pwm_config(dev);
 908         int index = sensor_attr->index;
 909         u8 tmp;
 910
 911         /* Speed cruise mode */
 912         if (data->pwm_fcms[0] & (1 << index)) {
 913                 tmp = 2;
 914                 goto out;
 915         }
 916         /* Thermal cruise or SmartFan IV mode */
 917         for (tmp = 0; tmp < 6; tmp++) {
 918                 if (data->pwm_tfmr[tmp] & (1 << index)) {
 919                         tmp = 3;
 920                         goto out;
 921                 }
 922         }
 923         /* Manual mode */
 924         tmp = 1;
 925
 926 out:
 927         return sprintf(buf, "%u\n", tmp);
 928 }
 929
 930 static ssize_t
 931 store_pwm_enable(struct device *dev, struct device_attribute *attr,
 932           const char *buf, size_t count)
 933 {
 934         struct i2c_client *client = to_i2c_client(dev);
 935         struct w83795_data *data = w83795_update_pwm_config(dev);
 936         struct sensor_device_attribute_2 *sensor_attr =
 937             to_sensor_dev_attr_2(attr);
 938         int index = sensor_attr->index;
 939         unsigned long val;
 940         int i;
 941
 942         if (kstrtoul(buf, 10, &val) < 0)
 943                 return -EINVAL;
 944         if (val < 1 || val > 2)
 945                 return -EINVAL;
 946
 947 #ifndef CONFIG_SENSORS_W83795_FANCTRL
 948         if (val > 1) {
 949                 dev_warn(dev, "Automatic fan speed control support disabled\n");
 950                 dev_warn(dev, "Build with CONFIG_SENSORS_W83795_FANCTRL=y if you want it\n");
 951                 return -EOPNOTSUPP;
 952         }
 953 #endif
 954
 955         mutex_lock(&data->update_lock);
 956         switch (val) {
 957         case 1:
 958                 /* Clear speed cruise mode bits */
 959                 data->pwm_fcms[0] &= ~(1 << index);
 960                 w83795_write(client, W83795_REG_FCMS1, data->pwm_fcms[0]);
 961                 /* Clear thermal cruise mode bits */
 962                 for (i = 0; i < 6; i++) {
 963                         data->pwm_tfmr[i] &= ~(1 << index);
 964                         w83795_write(client, W83795_REG_TFMR(i),
 965                                 data->pwm_tfmr[i]);
 966                 }
 967                 break;
 968         case 2:
 969                 data->pwm_fcms[0] |= (1 << index);
 970                 w83795_write(client, W83795_REG_FCMS1, data->pwm_fcms[0]);
 971                 break;
 972         }
 973         mutex_unlock(&data->update_lock);
 974         return count;
 975 }
 976
 977 static ssize_t
 978 show_pwm_mode(struct device *dev, struct device_attribute *attr, char *buf)
 979 {
 980         struct w83795_data *data = w83795_update_pwm_config(dev);
 981         int index = to_sensor_dev_attr_2(attr)->index;
 982         unsigned int mode;
 983
 984         if (data->pwm_fomc & (1 << index))
 985                 mode = 0;       /* DC */
 986         else
 987                 mode = 1;       /* PWM */
 988
 989         return sprintf(buf, "%u\n", mode);
 990 }
 991
 992 /*
 993  * Check whether a given temperature source can ever be useful.
 994  * Returns the number of selectable temperature channels which are
 995  * enabled.
 996  */
 997 static int w83795_tss_useful(const struct w83795_data *data, int tsrc)
 998 {
 999         int useful = 0, i;
1000
1001         for (i = 0; i < 4; i++) {
1002                 if (tss_map[i][tsrc] == TSS_MAP_RESERVED)
1003                         continue;
1004                 if (tss_map[i][tsrc] < 6)       /* Analog */
1005                         useful += (data->has_temp >> tss_map[i][tsrc]) & 1;
1006                 else                            /* Digital */
1007                         useful += (data->has_dts >> (tss_map[i][tsrc] - 6)) & 1;
1008         }
1009
1010         return useful;
1011 }
1012
1013 static ssize_t
1014 show_temp_src(struct device *dev, struct device_attribute *attr, char *buf)
1015 {
1016         struct sensor_device_attribute_2 *sensor_attr =
1017             to_sensor_dev_attr_2(attr);
1018         struct w83795_data *data = w83795_update_pwm_config(dev);
1019         int index = sensor_attr->index;
1020         u8 tmp = data->temp_src[index / 2];
1021
1022         if (index & 1)
1023                 tmp >>= 4;      /* Pick high nibble */
1024         else
1025                 tmp &= 0x0f;    /* Pick low nibble */
1026
1027         /* Look-up the actual temperature channel number */
1028         if (tmp >= 4 || tss_map[tmp][index] == TSS_MAP_RESERVED)
1029                 return -EINVAL;         /* Shouldn't happen */
1030
1031         return sprintf(buf, "%u\n", (unsigned int)tss_map[tmp][index] + 1);
1032 }
1033
1034 static ssize_t
1035 store_temp_src(struct device *dev, struct device_attribute *attr,
1036           const char *buf, size_t count)
1037 {
1038         struct i2c_client *client = to_i2c_client(dev);
1039         struct w83795_data *data = w83795_update_pwm_config(dev);
1040         struct sensor_device_attribute_2 *sensor_attr =
1041             to_sensor_dev_attr_2(attr);
1042         int index = sensor_attr->index;
1043         int tmp;
1044         unsigned long channel;
1045         u8 val = index / 2;
1046
1047         if (kstrtoul(buf, 10, &channel) < 0 ||
1048             channel < 1 || channel > 14)
1049                 return -EINVAL;
1050
1051         /* Check if request can be fulfilled */
1052         for (tmp = 0; tmp < 4; tmp++) {
1053                 if (tss_map[tmp][index] == channel - 1)
1054                         break;
1055         }
1056         if (tmp == 4)   /* No match */
1057                 return -EINVAL;
1058
1059         mutex_lock(&data->update_lock);
1060         if (index & 1) {
1061                 tmp <<= 4;
1062                 data->temp_src[val] &= 0x0f;
1063         } else {
1064                 data->temp_src[val] &= 0xf0;
1065         }
1066         data->temp_src[val] |= tmp;
1067         w83795_write(client, W83795_REG_TSS(val), data->temp_src[val]);
1068         mutex_unlock(&data->update_lock);
1069
1070         return count;
1071 }
1072
1073 #define TEMP_PWM_ENABLE   0
1074 #define TEMP_PWM_FAN_MAP  1
1075 static ssize_t
1076 show_temp_pwm_enable(struct device *dev, struct device_attribute *attr,
1077                      char *buf)
1078 {
1079         struct w83795_data *data = w83795_update_pwm_config(dev);
1080         struct sensor_device_attribute_2 *sensor_attr =
1081             to_sensor_dev_attr_2(attr);
1082         int nr = sensor_attr->nr;
1083         int index = sensor_attr->index;
1084         u8 tmp = 0xff;
1085
1086         switch (nr) {
1087         case TEMP_PWM_ENABLE:
1088                 tmp = (data->pwm_fcms[1] >> index) & 1;
1089                 if (tmp)
1090                         tmp = 4;
1091                 else
1092                         tmp = 3;
1093                 break;
1094         case TEMP_PWM_FAN_MAP:
1095                 tmp = data->pwm_tfmr[index];
1096                 break;
1097         }
1098
1099         return sprintf(buf, "%u\n", tmp);
1100 }
1101
1102 static ssize_t
1103 store_temp_pwm_enable(struct device *dev, struct device_attribute *attr,
1104           const char *buf, size_t count)
1105 {
1106         struct i2c_client *client = to_i2c_client(dev);
1107         struct w83795_data *data = w83795_update_pwm_config(dev);
1108         struct sensor_device_attribute_2 *sensor_attr =
1109             to_sensor_dev_attr_2(attr);
1110         int nr = sensor_attr->nr;
1111         int index = sensor_attr->index;
1112         unsigned long tmp;
1113
1114         if (kstrtoul(buf, 10, &tmp) < 0)
1115                 return -EINVAL;
1116
1117         switch (nr) {
1118         case TEMP_PWM_ENABLE:
1119                 if (tmp != 3 && tmp != 4)
1120                         return -EINVAL;
1121                 tmp -= 3;
1122                 mutex_lock(&data->update_lock);
1123                 data->pwm_fcms[1] &= ~(1 << index);
1124                 data->pwm_fcms[1] |= tmp << index;
1125                 w83795_write(client, W83795_REG_FCMS2, data->pwm_fcms[1]);
1126                 mutex_unlock(&data->update_lock);
1127                 break;
1128         case TEMP_PWM_FAN_MAP:
1129                 mutex_lock(&data->update_lock);
1130                 tmp = SENSORS_LIMIT(tmp, 0, 0xff);
1131                 w83795_write(client, W83795_REG_TFMR(index), tmp);
1132                 data->pwm_tfmr[index] = tmp;
1133                 mutex_unlock(&data->update_lock);
1134                 break;
1135         }
1136         return count;
1137 }
1138
1139 #define FANIN_TARGET   0
1140 #define FANIN_TOL      1
1141 static ssize_t
1142 show_fanin(struct device *dev, struct device_attribute *attr, char *buf)
1143 {
1144         struct w83795_data *data = w83795_update_pwm_config(dev);
1145         struct sensor_device_attribute_2 *sensor_attr =
1146             to_sensor_dev_attr_2(attr);
1147         int nr = sensor_attr->nr;
1148         int index = sensor_attr->index;
1149         u16 tmp = 0;
1150
1151         switch (nr) {
1152         case FANIN_TARGET:
1153                 tmp = fan_from_reg(data->target_speed[index]);
1154                 break;
1155         case FANIN_TOL:
1156                 tmp = data->tol_speed;
1157                 break;
1158         }
1159
1160         return sprintf(buf, "%u\n", tmp);
1161 }
1162
1163 static ssize_t
1164 store_fanin(struct device *dev, struct device_attribute *attr,
1165           const char *buf, size_t count)
1166 {
1167         struct i2c_client *client = to_i2c_client(dev);
1168         struct w83795_data *data = i2c_get_clientdata(client);
1169         struct sensor_device_attribute_2 *sensor_attr =
1170             to_sensor_dev_attr_2(attr);
1171         int nr = sensor_attr->nr;
1172         int index = sensor_attr->index;
1173         unsigned long val;
1174
1175         if (kstrtoul(buf, 10, &val) < 0)
1176                 return -EINVAL;
1177
1178         mutex_lock(&data->update_lock);
1179         switch (nr) {
1180         case FANIN_TARGET:
1181                 val = fan_to_reg(SENSORS_LIMIT(val, 0, 0xfff));
1182                 w83795_write(client, W83795_REG_FTSH(index), val >> 4);
1183                 w83795_write(client, W83795_REG_FTSL(index), (val << 4) & 0xf0);
1184                 data->target_speed[index] = val;
1185                 break;
1186         case FANIN_TOL:
1187                 val = SENSORS_LIMIT(val, 0, 0x3f);
1188                 w83795_write(client, W83795_REG_TFTS, val);
1189                 data->tol_speed = val;
1190                 break;
1191         }
1192         mutex_unlock(&data->update_lock);
1193
1194         return count;
1195 }
1196
1197
1198 static ssize_t
1199 show_temp_pwm(struct device *dev, struct device_attribute *attr, char *buf)
1200 {
1201         struct w83795_data *data = w83795_update_pwm_config(dev);
1202         struct sensor_device_attribute_2 *sensor_attr =
1203             to_sensor_dev_attr_2(attr);
1204         int nr = sensor_attr->nr;
1205         int index = sensor_attr->index;
1206         long tmp = temp_from_reg(data->pwm_temp[index][nr]);
1207
1208         return sprintf(buf, "%ld\n", tmp);
1209 }
1210
1211 static ssize_t
1212 store_temp_pwm(struct device *dev, struct device_attribute *attr,
1213           const char *buf, size_t count)
1214 {
1215         struct i2c_client *client = to_i2c_client(dev);
1216         struct w83795_data *data = i2c_get_clientdata(client);
1217         struct sensor_device_attribute_2 *sensor_attr =
1218             to_sensor_dev_attr_2(attr);
1219         int nr = sensor_attr->nr;
1220         int index = sensor_attr->index;
1221         unsigned long val;
1222         u8 tmp;
1223
1224         if (kstrtoul(buf, 10, &val) < 0)
1225                 return -EINVAL;
1226         val /= 1000;
1227
1228         mutex_lock(&data->update_lock);
1229         switch (nr) {
1230         case TEMP_PWM_TTTI:
1231                 val = SENSORS_LIMIT(val, 0, 0x7f);
1232                 w83795_write(client, W83795_REG_TTTI(index), val);
1233                 break;
1234         case TEMP_PWM_CTFS:
1235                 val = SENSORS_LIMIT(val, 0, 0x7f);
1236                 w83795_write(client, W83795_REG_CTFS(index), val);
1237                 break;
1238         case TEMP_PWM_HCT:
1239                 val = SENSORS_LIMIT(val, 0, 0x0f);
1240                 tmp = w83795_read(client, W83795_REG_HT(index));
1241                 tmp &= 0x0f;
1242                 tmp |= (val << 4) & 0xf0;
1243                 w83795_write(client, W83795_REG_HT(index), tmp);
1244                 break;
1245         case TEMP_PWM_HOT:
1246                 val = SENSORS_LIMIT(val, 0, 0x0f);
1247                 tmp = w83795_read(client, W83795_REG_HT(index));
1248                 tmp &= 0xf0;
1249                 tmp |= val & 0x0f;
1250                 w83795_write(client, W83795_REG_HT(index), tmp);
1251                 break;
1252         }
1253         data->pwm_temp[index][nr] = val;
1254         mutex_unlock(&data->update_lock);
1255
1256         return count;
1257 }
1258
1259 static ssize_t
1260 show_sf4_pwm(struct device *dev, struct device_attribute *attr, char *buf)
1261 {
1262         struct w83795_data *data = w83795_update_pwm_config(dev);
1263         struct sensor_device_attribute_2 *sensor_attr =
1264             to_sensor_dev_attr_2(attr);
1265         int nr = sensor_attr->nr;
1266         int index = sensor_attr->index;
1267
1268         return sprintf(buf, "%u\n", data->sf4_reg[index][SF4_PWM][nr]);
1269 }
1270
1271 static ssize_t
1272 store_sf4_pwm(struct device *dev, struct device_attribute *attr,
1273           const char *buf, size_t count)
1274 {
1275         struct i2c_client *client = to_i2c_client(dev);
1276         struct w83795_data *data = i2c_get_clientdata(client);
1277         struct sensor_device_attribute_2 *sensor_attr =
1278             to_sensor_dev_attr_2(attr);
1279         int nr = sensor_attr->nr;
1280         int index = sensor_attr->index;
1281         unsigned long val;
1282
1283         if (kstrtoul(buf, 10, &val) < 0)
1284                 return -EINVAL;
1285
1286         mutex_lock(&data->update_lock);
1287         w83795_write(client, W83795_REG_SF4_PWM(index, nr), val);
1288         data->sf4_reg[index][SF4_PWM][nr] = val;
1289         mutex_unlock(&data->update_lock);
1290
1291         return count;
1292 }
1293
1294 static ssize_t
1295 show_sf4_temp(struct device *dev, struct device_attribute *attr, char *buf)
1296 {
1297         struct w83795_data *data = w83795_update_pwm_config(dev);
1298         struct sensor_device_attribute_2 *sensor_attr =
1299             to_sensor_dev_attr_2(attr);
1300         int nr = sensor_attr->nr;
1301         int index = sensor_attr->index;
1302
1303         return sprintf(buf, "%u\n",
1304                 (data->sf4_reg[index][SF4_TEMP][nr]) * 1000);
1305 }
1306
1307 static ssize_t
1308 store_sf4_temp(struct device *dev, struct device_attribute *attr,
1309           const char *buf, size_t count)
1310 {
1311         struct i2c_client *client = to_i2c_client(dev);
1312         struct w83795_data *data = i2c_get_clientdata(client);
1313         struct sensor_device_attribute_2 *sensor_attr =
1314             to_sensor_dev_attr_2(attr);
1315         int nr = sensor_attr->nr;
1316         int index = sensor_attr->index;
1317         unsigned long val;
1318
1319         if (kstrtoul(buf, 10, &val) < 0)
1320                 return -EINVAL;
1321         val /= 1000;
1322
1323         mutex_lock(&data->update_lock);
1324         w83795_write(client, W83795_REG_SF4_TEMP(index, nr), val);
1325         data->sf4_reg[index][SF4_TEMP][nr] = val;
1326         mutex_unlock(&data->update_lock);
1327
1328         return count;
1329 }
1330
1331
1332 static ssize_t
1333 show_temp(struct device *dev, struct device_attribute *attr, char *buf)
1334 {
1335         struct sensor_device_attribute_2 *sensor_attr =
1336             to_sensor_dev_attr_2(attr);
1337         int nr = sensor_attr->nr;
1338         int index = sensor_attr->index;
1339         struct w83795_data *data = w83795_update_device(dev);
1340         long temp = temp_from_reg(data->temp[index][nr]);
1341
1342         if (nr == TEMP_READ)
1343                 temp += (data->temp_read_vrlsb[index] >> 6) * 250;
1344         return sprintf(buf, "%ld\n", temp);
1345 }
1346
1347 static ssize_t
1348 store_temp(struct device *dev, struct device_attribute *attr,
1349            const char *buf, size_t count)
1350 {
1351         struct sensor_device_attribute_2 *sensor_attr =
1352             to_sensor_dev_attr_2(attr);
1353         int nr = sensor_attr->nr;
1354         int index = sensor_attr->index;
1355         struct i2c_client *client = to_i2c_client(dev);
1356         struct w83795_data *data = i2c_get_clientdata(client);
1357         long tmp;
1358
1359         if (kstrtol(buf, 10, &tmp) < 0)
1360                 return -EINVAL;
1361
1362         mutex_lock(&data->update_lock);
1363         data->temp[index][nr] = temp_to_reg(tmp, -128, 127);
1364         w83795_write(client, W83795_REG_TEMP[index][nr], data->temp[index][nr]);
1365         mutex_unlock(&data->update_lock);
1366         return count;
1367 }
1368
1369
1370 static ssize_t
1371 show_dts_mode(struct device *dev, struct device_attribute *attr, char *buf)
1372 {
1373         struct w83795_data *data = dev_get_drvdata(dev);
1374         int tmp;
1375
1376         if (data->enable_dts & 2)
1377                 tmp = 5;
1378         else
1379                 tmp = 6;
1380
1381         return sprintf(buf, "%d\n", tmp);
1382 }
1383
1384 static ssize_t
1385 show_dts(struct device *dev, struct device_attribute *attr, char *buf)
1386 {
1387         struct sensor_device_attribute_2 *sensor_attr =
1388             to_sensor_dev_attr_2(attr);
1389         int index = sensor_attr->index;
1390         struct w83795_data *data = w83795_update_device(dev);
1391         long temp = temp_from_reg(data->dts[index]);
1392
1393         temp += (data->dts_read_vrlsb[index] >> 6) * 250;
1394         return sprintf(buf, "%ld\n", temp);
1395 }
1396
1397 static ssize_t
1398 show_dts_ext(struct device *dev, struct device_attribute *attr, char *buf)
1399 {
1400         struct sensor_device_attribute_2 *sensor_attr =
1401             to_sensor_dev_attr_2(attr);
1402         int nr = sensor_attr->nr;
1403         struct w83795_data *data = dev_get_drvdata(dev);
1404         long temp = temp_from_reg(data->dts_ext[nr]);
1405
1406         return sprintf(buf, "%ld\n", temp);
1407 }
1408
1409 static ssize_t
1410 store_dts_ext(struct device *dev, struct device_attribute *attr,
1411            const char *buf, size_t count)
1412 {
1413         struct sensor_device_attribute_2 *sensor_attr =
1414             to_sensor_dev_attr_2(attr);
1415         int nr = sensor_attr->nr;
1416         struct i2c_client *client = to_i2c_client(dev);
1417         struct w83795_data *data = i2c_get_clientdata(client);
1418         long tmp;
1419
1420         if (kstrtol(buf, 10, &tmp) < 0)
1421                 return -EINVAL;
1422
1423         mutex_lock(&data->update_lock);
1424         data->dts_ext[nr] = temp_to_reg(tmp, -128, 127);
1425         w83795_write(client, W83795_REG_DTS_EXT(nr), data->dts_ext[nr]);
1426         mutex_unlock(&data->update_lock);
1427         return count;
1428 }
1429
1430
1431 static ssize_t
1432 show_temp_mode(struct device *dev, struct device_attribute *attr, char *buf)
1433 {
1434         struct w83795_data *data = dev_get_drvdata(dev);
1435         struct sensor_device_attribute_2 *sensor_attr =
1436             to_sensor_dev_attr_2(attr);
1437         int index = sensor_attr->index;
1438         int tmp;
1439
1440         if (data->temp_mode & (1 << index))
1441                 tmp = 3;        /* Thermal diode */
1442         else
1443                 tmp = 4;        /* Thermistor */
1444
1445         return sprintf(buf, "%d\n", tmp);
1446 }
1447
1448 /* Only for temp1-4 (temp5-6 can only be thermistor) */
1449 static ssize_t
1450 store_temp_mode(struct device *dev, struct device_attribute *attr,
1451                 const char *buf, size_t count)
1452 {
1453         struct i2c_client *client = to_i2c_client(dev);
1454         struct w83795_data *data = i2c_get_clientdata(client);
1455         struct sensor_device_attribute_2 *sensor_attr =
1456             to_sensor_dev_attr_2(attr);
1457         int index = sensor_attr->index;
1458         int reg_shift;
1459         unsigned long val;
1460         u8 tmp;
1461
1462         if (kstrtoul(buf, 10, &val) < 0)
1463                 return -EINVAL;
1464         if ((val != 4) && (val != 3))
1465                 return -EINVAL;
1466
1467         mutex_lock(&data->update_lock);
1468         if (val == 3) {
1469                 /* Thermal diode */
1470                 val = 0x01;
1471                 data->temp_mode |= 1 << index;
1472         } else if (val == 4) {
1473                 /* Thermistor */
1474                 val = 0x03;
1475                 data->temp_mode &= ~(1 << index);
1476         }
1477
1478         reg_shift = 2 * index;
1479         tmp = w83795_read(client, W83795_REG_TEMP_CTRL2);
1480         tmp &= ~(0x03 << reg_shift);
1481         tmp |= val << reg_shift;
1482         w83795_write(client, W83795_REG_TEMP_CTRL2, tmp);
1483
1484         mutex_unlock(&data->update_lock);
1485         return count;
1486 }
1487
1488
1489 /* show/store VIN */
1490 static ssize_t
1491 show_in(struct device *dev, struct device_attribute *attr, char *buf)
1492 {
1493         struct sensor_device_attribute_2 *sensor_attr =
1494             to_sensor_dev_attr_2(attr);
1495         int nr = sensor_attr->nr;
1496         int index = sensor_attr->index;
1497         struct w83795_data *data = w83795_update_device(dev);
1498         u16 val = data->in[index][nr];
1499         u8 lsb_idx;
1500
1501         switch (nr) {
1502         case IN_READ:
1503                 /* calculate this value again by sensors as sensors3.conf */
1504                 if ((index >= 17) &&
1505                     !((data->has_gain >> (index - 17)) & 1))
1506                         val *= 8;
1507                 break;
1508         case IN_MAX:
1509         case IN_LOW:
1510                 lsb_idx = IN_LSB_SHIFT_IDX[index][IN_LSB_IDX];
1511                 val <<= 2;
1512                 val |= (data->in_lsb[lsb_idx][nr] >>
1513                         IN_LSB_SHIFT_IDX[index][IN_LSB_SHIFT]) & 0x03;
1514                 if ((index >= 17) &&
1515                     !((data->has_gain >> (index - 17)) & 1))
1516                         val *= 8;
1517                 break;
1518         }
1519         val = in_from_reg(index, val);
1520
1521         return sprintf(buf, "%d\n", val);
1522 }
1523
1524 static ssize_t
1525 store_in(struct device *dev, struct device_attribute *attr,
1526          const char *buf, size_t count)
1527 {
1528         struct sensor_device_attribute_2 *sensor_attr =
1529             to_sensor_dev_attr_2(attr);
1530         int nr = sensor_attr->nr;
1531         int index = sensor_attr->index;
1532         struct i2c_client *client = to_i2c_client(dev);
1533         struct w83795_data *data = i2c_get_clientdata(client);
1534         unsigned long val;
1535         u8 tmp;
1536         u8 lsb_idx;
1537
1538         if (kstrtoul(buf, 10, &val) < 0)
1539                 return -EINVAL;
1540         val = in_to_reg(index, val);
1541
1542         if ((index >= 17) &&
1543             !((data->has_gain >> (index - 17)) & 1))
1544                 val /= 8;
1545         val = SENSORS_LIMIT(val, 0, 0x3FF);
1546         mutex_lock(&data->update_lock);
1547
1548         lsb_idx = IN_LSB_SHIFT_IDX[index][IN_LSB_IDX];
1549         tmp = w83795_read(client, IN_LSB_REG(lsb_idx, nr));
1550         tmp &= ~(0x03 << IN_LSB_SHIFT_IDX[index][IN_LSB_SHIFT]);
1551         tmp |= (val & 0x03) << IN_LSB_SHIFT_IDX[index][IN_LSB_SHIFT];
1552         w83795_write(client, IN_LSB_REG(lsb_idx, nr), tmp);
1553         data->in_lsb[lsb_idx][nr] = tmp;
1554
1555         tmp = (val >> 2) & 0xff;
1556         w83795_write(client, W83795_REG_IN[index][nr], tmp);
1557         data->in[index][nr] = tmp;
1558
1559         mutex_unlock(&data->update_lock);
1560         return count;
1561 }
1562
1563
1564 #ifdef CONFIG_SENSORS_W83795_FANCTRL
1565 static ssize_t
1566 show_sf_setup(struct device *dev, struct device_attribute *attr, char *buf)
1567 {
1568         struct sensor_device_attribute_2 *sensor_attr =
1569             to_sensor_dev_attr_2(attr);
1570         int nr = sensor_attr->nr;
1571         struct w83795_data *data = w83795_update_pwm_config(dev);
1572         u16 val = data->setup_pwm[nr];
1573
1574         switch (nr) {
1575         case SETUP_PWM_UPTIME:
1576         case SETUP_PWM_DOWNTIME:
1577                 val = time_from_reg(val);
1578                 break;
1579         }
1580
1581         return sprintf(buf, "%d\n", val);
1582 }
1583
1584 static ssize_t
1585 store_sf_setup(struct device *dev, struct device_attribute *attr,
1586          const char *buf, size_t count)
1587 {
1588         struct sensor_device_attribute_2 *sensor_attr =
1589             to_sensor_dev_attr_2(attr);
1590         int nr = sensor_attr->nr;
1591         struct i2c_client *client = to_i2c_client(dev);
1592         struct w83795_data *data = i2c_get_clientdata(client);
1593         unsigned long val;
1594
1595         if (kstrtoul(buf, 10, &val) < 0)
1596                 return -EINVAL;
1597
1598         switch (nr) {
1599         case SETUP_PWM_DEFAULT:
1600                 val = SENSORS_LIMIT(val, 0, 0xff);
1601                 break;
1602         case SETUP_PWM_UPTIME:
1603         case SETUP_PWM_DOWNTIME:
1604                 val = time_to_reg(val);
1605                 if (val == 0)
1606                         return -EINVAL;
1607                 break;
1608         }
1609
1610         mutex_lock(&data->update_lock);
1611         data->setup_pwm[nr] = val;
1612         w83795_write(client, W83795_REG_SETUP_PWM(nr), val);
1613         mutex_unlock(&data->update_lock);
1614         return count;
1615 }
1616 #endif
1617
1618
1619 #define NOT_USED                        -1
1620
1621 /*
1622  * Don't change the attribute order, _max, _min and _beep are accessed by index
1623  * somewhere else in the code
1624  */
1625 #define SENSOR_ATTR_IN(index) {                                         \
1626         SENSOR_ATTR_2(in##index##_input, S_IRUGO, show_in, NULL,        \
1627                 IN_READ, index), \
1628         SENSOR_ATTR_2(in##index##_max, S_IRUGO | S_IWUSR, show_in,      \
1629                 store_in, IN_MAX, index),                               \
1630         SENSOR_ATTR_2(in##index##_min, S_IRUGO | S_IWUSR, show_in,      \
1631                 store_in, IN_LOW, index),                               \
1632         SENSOR_ATTR_2(in##index##_alarm, S_IRUGO, show_alarm_beep,      \
1633                 NULL, ALARM_STATUS, index + ((index > 14) ? 1 : 0)), \
1634         SENSOR_ATTR_2(in##index##_beep, S_IWUSR | S_IRUGO,              \
1635                 show_alarm_beep, store_beep, BEEP_ENABLE,               \
1636                 index + ((index > 14) ? 1 : 0)) }
1637
1638 /*
1639  * Don't change the attribute order, _beep is accessed by index
1640  * somewhere else in the code
1641  */
1642 #define SENSOR_ATTR_FAN(index) {                                        \
1643         SENSOR_ATTR_2(fan##index##_input, S_IRUGO, show_fan,            \
1644                 NULL, FAN_INPUT, index - 1), \
1645         SENSOR_ATTR_2(fan##index##_min, S_IWUSR | S_IRUGO,              \
1646                 show_fan, store_fan_min, FAN_MIN, index - 1),   \
1647         SENSOR_ATTR_2(fan##index##_alarm, S_IRUGO, show_alarm_beep,     \
1648                 NULL, ALARM_STATUS, index + 31),                        \
1649         SENSOR_ATTR_2(fan##index##_beep, S_IWUSR | S_IRUGO,             \
1650                 show_alarm_beep, store_beep, BEEP_ENABLE, index + 31) }
1651
1652 #define SENSOR_ATTR_PWM(index) {                                        \
1653         SENSOR_ATTR_2(pwm##index, S_IWUSR | S_IRUGO, show_pwm,          \
1654                 store_pwm, PWM_OUTPUT, index - 1),                      \
1655         SENSOR_ATTR_2(pwm##index##_enable, S_IWUSR | S_IRUGO,           \
1656                 show_pwm_enable, store_pwm_enable, NOT_USED, index - 1), \
1657         SENSOR_ATTR_2(pwm##index##_mode, S_IRUGO,                       \
1658                 show_pwm_mode, NULL, NOT_USED, index - 1),              \
1659         SENSOR_ATTR_2(pwm##index##_freq, S_IWUSR | S_IRUGO,             \
1660                 show_pwm, store_pwm, PWM_FREQ, index - 1),              \
1661         SENSOR_ATTR_2(pwm##index##_nonstop, S_IWUSR | S_IRUGO,          \
1662                 show_pwm, store_pwm, PWM_NONSTOP, index - 1),           \
1663         SENSOR_ATTR_2(pwm##index##_start, S_IWUSR | S_IRUGO,            \
1664                 show_pwm, store_pwm, PWM_START, index - 1),             \
1665         SENSOR_ATTR_2(pwm##index##_stop_time, S_IWUSR | S_IRUGO,        \
1666                 show_pwm, store_pwm, PWM_STOP_TIME, index - 1),  \
1667         SENSOR_ATTR_2(fan##index##_target, S_IWUSR | S_IRUGO, \
1668                 show_fanin, store_fanin, FANIN_TARGET, index - 1) }
1669
1670 /*
1671  * Don't change the attribute order, _beep is accessed by index
1672  * somewhere else in the code
1673  */
1674 #define SENSOR_ATTR_DTS(index) {                                        \
1675         SENSOR_ATTR_2(temp##index##_type, S_IRUGO ,             \
1676                 show_dts_mode, NULL, NOT_USED, index - 7),      \
1677         SENSOR_ATTR_2(temp##index##_input, S_IRUGO, show_dts,           \
1678                 NULL, NOT_USED, index - 7),                             \
1679         SENSOR_ATTR_2(temp##index##_crit, S_IRUGO | S_IWUSR, show_dts_ext, \
1680                 store_dts_ext, DTS_CRIT, NOT_USED),                     \
1681         SENSOR_ATTR_2(temp##index##_crit_hyst, S_IRUGO | S_IWUSR,       \
1682                 show_dts_ext, store_dts_ext, DTS_CRIT_HYST, NOT_USED),  \
1683         SENSOR_ATTR_2(temp##index##_max, S_IRUGO | S_IWUSR, show_dts_ext, \
1684                 store_dts_ext, DTS_WARN, NOT_USED),                     \
1685         SENSOR_ATTR_2(temp##index##_max_hyst, S_IRUGO | S_IWUSR,        \
1686                 show_dts_ext, store_dts_ext, DTS_WARN_HYST, NOT_USED),  \
1687         SENSOR_ATTR_2(temp##index##_alarm, S_IRUGO,                     \
1688                 show_alarm_beep, NULL, ALARM_STATUS, index + 17),       \
1689         SENSOR_ATTR_2(temp##index##_beep, S_IWUSR | S_IRUGO,            \
1690                 show_alarm_beep, store_beep, BEEP_ENABLE, index + 17) }
1691
1692 /*
1693  * Don't change the attribute order, _beep is accessed by index
1694  * somewhere else in the code
1695  */
1696 #define SENSOR_ATTR_TEMP(index) {                                       \
1697         SENSOR_ATTR_2(temp##index##_type, S_IRUGO | (index < 4 ? S_IWUSR : 0), \
1698                 show_temp_mode, store_temp_mode, NOT_USED, index - 1),  \
1699         SENSOR_ATTR_2(temp##index##_input, S_IRUGO, show_temp,          \
1700                 NULL, TEMP_READ, index - 1),                            \
1701         SENSOR_ATTR_2(temp##index##_crit, S_IRUGO | S_IWUSR, show_temp, \
1702                 store_temp, TEMP_CRIT, index - 1),                      \
1703         SENSOR_ATTR_2(temp##index##_crit_hyst, S_IRUGO | S_IWUSR,       \
1704                 show_temp, store_temp, TEMP_CRIT_HYST, index - 1),      \
1705         SENSOR_ATTR_2(temp##index##_max, S_IRUGO | S_IWUSR, show_temp,  \
1706                 store_temp, TEMP_WARN, index - 1),                      \
1707         SENSOR_ATTR_2(temp##index##_max_hyst, S_IRUGO | S_IWUSR,        \
1708                 show_temp, store_temp, TEMP_WARN_HYST, index - 1),      \
1709         SENSOR_ATTR_2(temp##index##_alarm, S_IRUGO,                     \
1710                 show_alarm_beep, NULL, ALARM_STATUS,                    \
1711                 index + (index > 4 ? 11 : 17)),                         \
1712         SENSOR_ATTR_2(temp##index##_beep, S_IWUSR | S_IRUGO,            \
1713                 show_alarm_beep, store_beep, BEEP_ENABLE,               \
1714                 index + (index > 4 ? 11 : 17)),                         \
1715         SENSOR_ATTR_2(temp##index##_pwm_enable, S_IWUSR | S_IRUGO,      \
1716                 show_temp_pwm_enable, store_temp_pwm_enable,            \
1717                 TEMP_PWM_ENABLE, index - 1),                            \
1718         SENSOR_ATTR_2(temp##index##_auto_channels_pwm, S_IWUSR | S_IRUGO, \
1719                 show_temp_pwm_enable, store_temp_pwm_enable,            \
1720                 TEMP_PWM_FAN_MAP, index - 1),                           \
1721         SENSOR_ATTR_2(thermal_cruise##index, S_IWUSR | S_IRUGO,         \
1722                 show_temp_pwm, store_temp_pwm, TEMP_PWM_TTTI, index - 1), \
1723         SENSOR_ATTR_2(temp##index##_warn, S_IWUSR | S_IRUGO,            \
1724                 show_temp_pwm, store_temp_pwm, TEMP_PWM_CTFS, index - 1), \
1725         SENSOR_ATTR_2(temp##index##_warn_hyst, S_IWUSR | S_IRUGO,       \
1726                 show_temp_pwm, store_temp_pwm, TEMP_PWM_HCT, index - 1), \
1727         SENSOR_ATTR_2(temp##index##_operation_hyst, S_IWUSR | S_IRUGO,  \
1728                 show_temp_pwm, store_temp_pwm, TEMP_PWM_HOT, index - 1), \
1729         SENSOR_ATTR_2(temp##index##_auto_point1_pwm, S_IRUGO | S_IWUSR, \
1730                 show_sf4_pwm, store_sf4_pwm, 0, index - 1),             \
1731         SENSOR_ATTR_2(temp##index##_auto_point2_pwm, S_IRUGO | S_IWUSR, \
1732                 show_sf4_pwm, store_sf4_pwm, 1, index - 1),             \
1733         SENSOR_ATTR_2(temp##index##_auto_point3_pwm, S_IRUGO | S_IWUSR, \
1734                 show_sf4_pwm, store_sf4_pwm, 2, index - 1),             \
1735         SENSOR_ATTR_2(temp##index##_auto_point4_pwm, S_IRUGO | S_IWUSR, \
1736                 show_sf4_pwm, store_sf4_pwm, 3, index - 1),             \
1737         SENSOR_ATTR_2(temp##index##_auto_point5_pwm, S_IRUGO | S_IWUSR, \
1738                 show_sf4_pwm, store_sf4_pwm, 4, index - 1),             \
1739         SENSOR_ATTR_2(temp##index##_auto_point6_pwm, S_IRUGO | S_IWUSR, \
1740                 show_sf4_pwm, store_sf4_pwm, 5, index - 1),             \
1741         SENSOR_ATTR_2(temp##index##_auto_point7_pwm, S_IRUGO | S_IWUSR, \
1742                 show_sf4_pwm, store_sf4_pwm, 6, index - 1),             \
1743         SENSOR_ATTR_2(temp##index##_auto_point1_temp, S_IRUGO | S_IWUSR,\
1744                 show_sf4_temp, store_sf4_temp, 0, index - 1),           \
1745         SENSOR_ATTR_2(temp##index##_auto_point2_temp, S_IRUGO | S_IWUSR,\
1746                 show_sf4_temp, store_sf4_temp, 1, index - 1),           \
1747         SENSOR_ATTR_2(temp##index##_auto_point3_temp, S_IRUGO | S_IWUSR,\
1748                 show_sf4_temp, store_sf4_temp, 2, index - 1),           \
1749         SENSOR_ATTR_2(temp##index##_auto_point4_temp, S_IRUGO | S_IWUSR,\
1750                 show_sf4_temp, store_sf4_temp, 3, index - 1),           \
1751         SENSOR_ATTR_2(temp##index##_auto_point5_temp, S_IRUGO | S_IWUSR,\
1752                 show_sf4_temp, store_sf4_temp, 4, index - 1),           \
1753         SENSOR_ATTR_2(temp##index##_auto_point6_temp, S_IRUGO | S_IWUSR,\
1754                 show_sf4_temp, store_sf4_temp, 5, index - 1),           \
1755         SENSOR_ATTR_2(temp##index##_auto_point7_temp, S_IRUGO | S_IWUSR,\
1756                 show_sf4_temp, store_sf4_temp, 6, index - 1) }
1757
1758
1759 static struct sensor_device_attribute_2 w83795_in[][5] = {
1760         SENSOR_ATTR_IN(0),
1761         SENSOR_ATTR_IN(1),
1762         SENSOR_ATTR_IN(2),
1763         SENSOR_ATTR_IN(3),
1764         SENSOR_ATTR_IN(4),
1765         SENSOR_ATTR_IN(5),
1766         SENSOR_ATTR_IN(6),
1767         SENSOR_ATTR_IN(7),
1768         SENSOR_ATTR_IN(8),
1769         SENSOR_ATTR_IN(9),
1770         SENSOR_ATTR_IN(10),
1771         SENSOR_ATTR_IN(11),
1772         SENSOR_ATTR_IN(12),
1773         SENSOR_ATTR_IN(13),
1774         SENSOR_ATTR_IN(14),
1775         SENSOR_ATTR_IN(15),
1776         SENSOR_ATTR_IN(16),
1777         SENSOR_ATTR_IN(17),
1778         SENSOR_ATTR_IN(18),
1779         SENSOR_ATTR_IN(19),
1780         SENSOR_ATTR_IN(20),
1781 };
1782
1783 static const struct sensor_device_attribute_2 w83795_fan[][4] = {
1784         SENSOR_ATTR_FAN(1),
1785         SENSOR_ATTR_FAN(2),
1786         SENSOR_ATTR_FAN(3),
1787         SENSOR_ATTR_FAN(4),
1788         SENSOR_ATTR_FAN(5),
1789         SENSOR_ATTR_FAN(6),
1790         SENSOR_ATTR_FAN(7),
1791         SENSOR_ATTR_FAN(8),
1792         SENSOR_ATTR_FAN(9),
1793         SENSOR_ATTR_FAN(10),
1794         SENSOR_ATTR_FAN(11),
1795         SENSOR_ATTR_FAN(12),
1796         SENSOR_ATTR_FAN(13),
1797         SENSOR_ATTR_FAN(14),
1798 };
1799
1800 static const struct sensor_device_attribute_2 w83795_temp[][28] = {
1801         SENSOR_ATTR_TEMP(1),
1802         SENSOR_ATTR_TEMP(2),
1803         SENSOR_ATTR_TEMP(3),
1804         SENSOR_ATTR_TEMP(4),
1805         SENSOR_ATTR_TEMP(5),
1806         SENSOR_ATTR_TEMP(6),
1807 };
1808
1809 static const struct sensor_device_attribute_2 w83795_dts[][8] = {
1810         SENSOR_ATTR_DTS(7),
1811         SENSOR_ATTR_DTS(8),
1812         SENSOR_ATTR_DTS(9),
1813         SENSOR_ATTR_DTS(10),
1814         SENSOR_ATTR_DTS(11),
1815         SENSOR_ATTR_DTS(12),
1816         SENSOR_ATTR_DTS(13),
1817         SENSOR_ATTR_DTS(14),
1818 };
1819
1820 static const struct sensor_device_attribute_2 w83795_pwm[][8] = {
1821         SENSOR_ATTR_PWM(1),
1822         SENSOR_ATTR_PWM(2),
1823         SENSOR_ATTR_PWM(3),
1824         SENSOR_ATTR_PWM(4),
1825         SENSOR_ATTR_PWM(5),
1826         SENSOR_ATTR_PWM(6),
1827         SENSOR_ATTR_PWM(7),
1828         SENSOR_ATTR_PWM(8),
1829 };
1830
1831 static const struct sensor_device_attribute_2 w83795_tss[6] = {
1832         SENSOR_ATTR_2(temp1_source_sel, S_IWUSR | S_IRUGO,
1833                       show_temp_src, store_temp_src, NOT_USED, 0),
1834         SENSOR_ATTR_2(temp2_source_sel, S_IWUSR | S_IRUGO,
1835                       show_temp_src, store_temp_src, NOT_USED, 1),
1836         SENSOR_ATTR_2(temp3_source_sel, S_IWUSR | S_IRUGO,
1837                       show_temp_src, store_temp_src, NOT_USED, 2),
1838         SENSOR_ATTR_2(temp4_source_sel, S_IWUSR | S_IRUGO,
1839                       show_temp_src, store_temp_src, NOT_USED, 3),
1840         SENSOR_ATTR_2(temp5_source_sel, S_IWUSR | S_IRUGO,
1841                       show_temp_src, store_temp_src, NOT_USED, 4),
1842         SENSOR_ATTR_2(temp6_source_sel, S_IWUSR | S_IRUGO,
1843                       show_temp_src, store_temp_src, NOT_USED, 5),
1844 };
1845
1846 static const struct sensor_device_attribute_2 sda_single_files[] = {
1847         SENSOR_ATTR_2(intrusion0_alarm, S_IWUSR | S_IRUGO, show_alarm_beep,
1848                       store_chassis_clear, ALARM_STATUS, 46),
1849 #ifdef CONFIG_SENSORS_W83795_FANCTRL
1850         SENSOR_ATTR_2(speed_cruise_tolerance, S_IWUSR | S_IRUGO, show_fanin,
1851                 store_fanin, FANIN_TOL, NOT_USED),
1852         SENSOR_ATTR_2(pwm_default, S_IWUSR | S_IRUGO, show_sf_setup,
1853                       store_sf_setup, SETUP_PWM_DEFAULT, NOT_USED),
1854         SENSOR_ATTR_2(pwm_uptime, S_IWUSR | S_IRUGO, show_sf_setup,
1855                       store_sf_setup, SETUP_PWM_UPTIME, NOT_USED),
1856         SENSOR_ATTR_2(pwm_downtime, S_IWUSR | S_IRUGO, show_sf_setup,
1857                       store_sf_setup, SETUP_PWM_DOWNTIME, NOT_USED),
1858 #endif
1859 };
1860
1861 static const struct sensor_device_attribute_2 sda_beep_files[] = {
1862         SENSOR_ATTR_2(intrusion0_beep, S_IWUSR | S_IRUGO, show_alarm_beep,
1863                       store_beep, BEEP_ENABLE, 46),
1864         SENSOR_ATTR_2(beep_enable, S_IWUSR | S_IRUGO, show_alarm_beep,
1865                       store_beep, BEEP_ENABLE, 47),
1866 };
1867
1868 /*
1869  * Driver interface
1870  */
1871
1872 static void w83795_init_client(struct i2c_client *client)
1873 {
1874         struct w83795_data *data = i2c_get_clientdata(client);
1875         static const u16 clkin[4] = {   /* in kHz */
1876                 14318, 24000, 33333, 48000
1877         };
1878         u8 config;
1879
1880         if (reset)
1881                 w83795_write(client, W83795_REG_CONFIG, 0x80);
1882
1883         /* Start monitoring if needed */
1884         config = w83795_read(client, W83795_REG_CONFIG);
1885         if (!(config & W83795_REG_CONFIG_START)) {
1886                 dev_info(&client->dev, "Enabling monitoring operations\n");
1887                 w83795_write(client, W83795_REG_CONFIG,
1888                              config | W83795_REG_CONFIG_START);
1889         }
1890
1891         data->clkin = clkin[(config >> 3) & 0x3];
1892         dev_dbg(&client->dev, "clkin = %u kHz\n", data->clkin);
1893 }
1894
1895 static int w83795_get_device_id(struct i2c_client *client)
1896 {
1897         int device_id;
1898
1899         device_id = i2c_smbus_read_byte_data(client, W83795_REG_DEVICEID);
1900
1901         /*
1902          * Special case for rev. A chips; can't be checked first because later
1903          * revisions emulate this for compatibility
1904          */
1905         if (device_id < 0 || (device_id & 0xf0) != 0x50) {
1906                 int alt_id;
1907
1908                 alt_id = i2c_smbus_read_byte_data(client,
1909                                                   W83795_REG_DEVICEID_A);
1910                 if (alt_id == 0x50)
1911                         device_id = alt_id;
1912         }
1913
1914         return device_id;
1915 }
1916
1917 /* Return 0 if detection is successful, -ENODEV otherwise */
1918 static int w83795_detect(struct i2c_client *client,
1919                          struct i2c_board_info *info)
1920 {
1921         int bank, vendor_id, device_id, expected, i2c_addr, config;
1922         struct i2c_adapter *adapter = client->adapter;
1923         unsigned short address = client->addr;
1924         const char *chip_name;
1925
1926         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1927                 return -ENODEV;
1928         bank = i2c_smbus_read_byte_data(client, W83795_REG_BANKSEL);
1929         if (bank < 0 || (bank & 0x7c)) {
1930                 dev_dbg(&adapter->dev,
1931                         "w83795: Detection failed at addr 0x%02hx, check %s\n",
1932                         address, "bank");
1933                 return -ENODEV;
1934         }
1935
1936         /* Check Nuvoton vendor ID */
1937         vendor_id = i2c_smbus_read_byte_data(client, W83795_REG_VENDORID);
1938         expected = bank & 0x80 ? 0x5c : 0xa3;
1939         if (vendor_id != expected) {
1940                 dev_dbg(&adapter->dev,
1941                         "w83795: Detection failed at addr 0x%02hx, check %s\n",
1942                         address, "vendor id");
1943                 return -ENODEV;
1944         }
1945
1946         /* Check device ID */
1947         device_id = w83795_get_device_id(client) |
1948                     (i2c_smbus_read_byte_data(client, W83795_REG_CHIPID) << 8);
1949         if ((device_id >> 4) != 0x795) {
1950                 dev_dbg(&adapter->dev,
1951                         "w83795: Detection failed at addr 0x%02hx, check %s\n",
1952                         address, "device id\n");
1953                 return -ENODEV;
1954         }
1955
1956         /*
1957          * If Nuvoton chip, address of chip and W83795_REG_I2C_ADDR
1958          * should match
1959          */
1960         if ((bank & 0x07) == 0) {
1961                 i2c_addr = i2c_smbus_read_byte_data(client,
1962                                                     W83795_REG_I2C_ADDR);
1963                 if ((i2c_addr & 0x7f) != address) {
1964                         dev_dbg(&adapter->dev,
1965                                 "w83795: Detection failed at addr 0x%02hx, "
1966                                 "check %s\n", address, "i2c addr");
1967                         return -ENODEV;
1968                 }
1969         }
1970
1971         /*
1972          * Check 795 chip type: 795G or 795ADG
1973          * Usually we don't write to chips during detection, but here we don't
1974          * quite have the choice; hopefully it's OK, we are about to return
1975          * success anyway
1976          */
1977         if ((bank & 0x07) != 0)
1978                 i2c_smbus_write_byte_data(client, W83795_REG_BANKSEL,
1979                                           bank & ~0x07);
1980         config = i2c_smbus_read_byte_data(client, W83795_REG_CONFIG);
1981         if (config & W83795_REG_CONFIG_CONFIG48)
1982                 chip_name = "w83795adg";
1983         else
1984                 chip_name = "w83795g";
1985
1986         strlcpy(info->type, chip_name, I2C_NAME_SIZE);
1987         dev_info(&adapter->dev, "Found %s rev. %c at 0x%02hx\n", chip_name,
1988                  'A' + (device_id & 0xf), address);
1989
1990         return 0;
1991 }
1992
1993 #ifdef CONFIG_SENSORS_W83795_FANCTRL
1994 #define NUM_PWM_ATTRIBUTES      ARRAY_SIZE(w83795_pwm[0])
1995 #define NUM_TEMP_ATTRIBUTES     ARRAY_SIZE(w83795_temp[0])
1996 #else
1997 #define NUM_PWM_ATTRIBUTES      4
1998 #define NUM_TEMP_ATTRIBUTES     8
1999 #endif
2000
2001 static int w83795_handle_files(struct device *dev, int (*fn)(struct device *,
2002                                const struct device_attribute *))
2003 {
2004         struct w83795_data *data = dev_get_drvdata(dev);
2005         int err, i, j;
2006
2007         for (i = 0; i < ARRAY_SIZE(w83795_in); i++) {
2008                 if (!(data->has_in & (1 << i)))
2009                         continue;
2010                 for (j = 0; j < ARRAY_SIZE(w83795_in[0]); j++) {
2011                         if (j == 4 && !data->enable_beep)
2012                                 continue;
2013                         err = fn(dev, &w83795_in[i][j].dev_attr);
2014                         if (err)
2015                                 return err;
2016                 }
2017         }
2018
2019         for (i = 0; i < ARRAY_SIZE(w83795_fan); i++) {
2020                 if (!(data->has_fan & (1 << i)))
2021                         continue;
2022                 for (j = 0; j < ARRAY_SIZE(w83795_fan[0]); j++) {
2023                         if (j == 3 && !data->enable_beep)
2024                                 continue;
2025                         err = fn(dev, &w83795_fan[i][j].dev_attr);
2026                         if (err)
2027                                 return err;
2028                 }
2029         }
2030
2031         for (i = 0; i < ARRAY_SIZE(w83795_tss); i++) {
2032                 j = w83795_tss_useful(data, i);
2033                 if (!j)
2034                         continue;
2035                 err = fn(dev, &w83795_tss[i].dev_attr);
2036                 if (err)
2037                         return err;
2038         }
2039
2040         for (i = 0; i < ARRAY_SIZE(sda_single_files); i++) {
2041                 err = fn(dev, &sda_single_files[i].dev_attr);
2042                 if (err)
2043                         return err;
2044         }
2045
2046         if (data->enable_beep) {
2047                 for (i = 0; i < ARRAY_SIZE(sda_beep_files); i++) {
2048                         err = fn(dev, &sda_beep_files[i].dev_attr);
2049                         if (err)
2050                                 return err;
2051                 }
2052         }
2053
2054         for (i = 0; i < data->has_pwm; i++) {
2055                 for (j = 0; j < NUM_PWM_ATTRIBUTES; j++) {
2056                         err = fn(dev, &w83795_pwm[i][j].dev_attr);
2057                         if (err)
2058                                 return err;
2059                 }
2060         }
2061
2062         for (i = 0; i < ARRAY_SIZE(w83795_temp); i++) {
2063                 if (!(data->has_temp & (1 << i)))
2064                         continue;
2065                 for (j = 0; j < NUM_TEMP_ATTRIBUTES; j++) {
2066                         if (j == 7 && !data->enable_beep)
2067                                 continue;
2068                         err = fn(dev, &w83795_temp[i][j].dev_attr);
2069                         if (err)
2070                                 return err;
2071                 }
2072         }
2073
2074         if (data->enable_dts) {
2075                 for (i = 0; i < ARRAY_SIZE(w83795_dts); i++) {
2076                         if (!(data->has_dts & (1 << i)))
2077                                 continue;
2078                         for (j = 0; j < ARRAY_SIZE(w83795_dts[0]); j++) {
2079                                 if (j == 7 && !data->enable_beep)
2080                                         continue;
2081                                 err = fn(dev, &w83795_dts[i][j].dev_attr);
2082                                 if (err)
2083                                         return err;
2084                         }
2085                 }
2086         }
2087
2088         return 0;
2089 }
2090
2091 /* We need a wrapper that fits in w83795_handle_files */
2092 static int device_remove_file_wrapper(struct device *dev,
2093                                       const struct device_attribute *attr)
2094 {
2095         device_remove_file(dev, attr);
2096         return 0;
2097 }
2098
2099 static void w83795_check_dynamic_in_limits(struct i2c_client *client)
2100 {
2101         struct w83795_data *data = i2c_get_clientdata(client);
2102         u8 vid_ctl;
2103         int i, err_max, err_min;
2104
2105         vid_ctl = w83795_read(client, W83795_REG_VID_CTRL);
2106
2107         /* Return immediately if VRM isn't configured */
2108         if ((vid_ctl & 0x07) == 0x00 || (vid_ctl & 0x07) == 0x07)
2109                 return;
2110
2111         data->has_dyn_in = (vid_ctl >> 3) & 0x07;
2112         for (i = 0; i < 2; i++) {
2113                 if (!(data->has_dyn_in & (1 << i)))
2114                         continue;
2115
2116                 /* Voltage limits in dynamic mode, switch to read-only */
2117                 err_max = sysfs_chmod_file(&client->dev.kobj,
2118                                            &w83795_in[i][2].dev_attr.attr,
2119                                            S_IRUGO);
2120                 err_min = sysfs_chmod_file(&client->dev.kobj,
2121                                            &w83795_in[i][3].dev_attr.attr,
2122                                            S_IRUGO);
2123                 if (err_max || err_min)
2124                         dev_warn(&client->dev, "Failed to set in%d limits "
2125                                  "read-only (%d, %d)\n", i, err_max, err_min);
2126                 else
2127                         dev_info(&client->dev, "in%d limits set dynamically "
2128                                  "from VID\n", i);
2129         }
2130 }
2131
2132 /* Check pins that can be used for either temperature or voltage monitoring */
2133 static void w83795_apply_temp_config(struct w83795_data *data, u8 config,
2134                                      int temp_chan, int in_chan)
2135 {
2136         /* config is a 2-bit value */
2137         switch (config) {
2138         case 0x2: /* Voltage monitoring */
2139                 data->has_in |= 1 << in_chan;
2140                 break;
2141         case 0x1: /* Thermal diode */
2142                 if (temp_chan >= 4)
2143                         break;
2144                 data->temp_mode |= 1 << temp_chan;
2145                 /* fall through */
2146         case 0x3: /* Thermistor */
2147                 data->has_temp |= 1 << temp_chan;
2148                 break;
2149         }
2150 }
2151
2152 static int w83795_probe(struct i2c_client *client,
2153                         const struct i2c_device_id *id)
2154 {
2155         int i;
2156         u8 tmp;
2157         struct device *dev = &client->dev;
2158         struct w83795_data *data;
2159         int err;
2160
2161         data = devm_kzalloc(dev, sizeof(struct w83795_data), GFP_KERNEL);
2162         if (!data)
2163                 return -ENOMEM;
2164
2165         i2c_set_clientdata(client, data);
2166         data->chip_type = id->driver_data;
2167         data->bank = i2c_smbus_read_byte_data(client, W83795_REG_BANKSEL);
2168         mutex_init(&data->update_lock);
2169
2170         /* Initialize the chip */
2171         w83795_init_client(client);
2172
2173         /* Check which voltages and fans are present */
2174         data->has_in = w83795_read(client, W83795_REG_VOLT_CTRL1)
2175                      | (w83795_read(client, W83795_REG_VOLT_CTRL2) << 8);
2176         data->has_fan = w83795_read(client, W83795_REG_FANIN_CTRL1)
2177                       | (w83795_read(client, W83795_REG_FANIN_CTRL2) << 8);
2178
2179         /* Check which analog temperatures and extra voltages are present */
2180         tmp = w83795_read(client, W83795_REG_TEMP_CTRL1);
2181         if (tmp & 0x20)
2182                 data->enable_dts = 1;
2183         w83795_apply_temp_config(data, (tmp >> 2) & 0x3, 5, 16);
2184         w83795_apply_temp_config(data, tmp & 0x3, 4, 15);
2185         tmp = w83795_read(client, W83795_REG_TEMP_CTRL2);
2186         w83795_apply_temp_config(data, tmp >> 6, 3, 20);
2187         w83795_apply_temp_config(data, (tmp >> 4) & 0x3, 2, 19);
2188         w83795_apply_temp_config(data, (tmp >> 2) & 0x3, 1, 18);
2189         w83795_apply_temp_config(data, tmp & 0x3, 0, 17);
2190
2191         /* Check DTS enable status */
2192         if (data->enable_dts) {
2193                 if (1 & w83795_read(client, W83795_REG_DTSC))
2194                         data->enable_dts |= 2;
2195                 data->has_dts = w83795_read(client, W83795_REG_DTSE);
2196         }
2197
2198         /* Report PECI Tbase values */
2199         if (data->enable_dts == 1) {
2200                 for (i = 0; i < 8; i++) {
2201                         if (!(data->has_dts & (1 << i)))
2202                                 continue;
2203                         tmp = w83795_read(client, W83795_REG_PECI_TBASE(i));
2204                         dev_info(&client->dev,
2205                                  "PECI agent %d Tbase temperature: %u\n",
2206                                  i + 1, (unsigned int)tmp & 0x7f);
2207                 }
2208         }
2209
2210         data->has_gain = w83795_read(client, W83795_REG_VMIGB_CTRL) & 0x0f;
2211
2212         /* pwm and smart fan */
2213         if (data->chip_type == w83795g)
2214                 data->has_pwm = 8;
2215         else
2216                 data->has_pwm = 2;
2217
2218         /* Check if BEEP pin is available */
2219         if (data->chip_type == w83795g) {
2220                 /* The W83795G has a dedicated BEEP pin */
2221                 data->enable_beep = 1;
2222         } else {
2223                 /*
2224                  * The W83795ADG has a shared pin for OVT# and BEEP, so you
2225                  * can't have both
2226                  */
2227                 tmp = w83795_read(client, W83795_REG_OVT_CFG);
2228                 if ((tmp & OVT_CFG_SEL) == 0)
2229                         data->enable_beep = 1;
2230         }
2231
2232         err = w83795_handle_files(dev, device_create_file);
2233         if (err)
2234                 goto exit_remove;
2235
2236         if (data->chip_type == w83795g)
2237                 w83795_check_dynamic_in_limits(client);
2238
2239         data->hwmon_dev = hwmon_device_register(dev);
2240         if (IS_ERR(data->hwmon_dev)) {
2241                 err = PTR_ERR(data->hwmon_dev);
2242                 goto exit_remove;
2243         }
2244
2245         return 0;
2246
2247 exit_remove:
2248         w83795_handle_files(dev, device_remove_file_wrapper);
2249         return err;
2250 }
2251
2252 static int w83795_remove(struct i2c_client *client)
2253 {
2254         struct w83795_data *data = i2c_get_clientdata(client);
2255
2256         hwmon_device_unregister(data->hwmon_dev);
2257         w83795_handle_files(&client->dev, device_remove_file_wrapper);
2258
2259         return 0;
2260 }
2261
2262
2263 static const struct i2c_device_id w83795_id[] = {
2264         { "w83795g", w83795g },
2265         { "w83795adg", w83795adg },
2266         { }
2267 };
2268 MODULE_DEVICE_TABLE(i2c, w83795_id);
2269
2270 static struct i2c_driver w83795_driver = {
2271         .driver = {
2272                    .name = "w83795",
2273         },
2274         .probe          = w83795_probe,
2275         .remove         = w83795_remove,
2276         .id_table       = w83795_id,
2277
2278         .class          = I2C_CLASS_HWMON,
2279         .detect         = w83795_detect,
2280         .address_list   = normal_i2c,
2281 };
2282
2283 module_i2c_driver(w83795_driver);
2284
2285 MODULE_AUTHOR("Wei Song, Jean Delvare <khali@linux-fr.org>");
2286 MODULE_DESCRIPTION("W83795G/ADG hardware monitoring driver");
2287 MODULE_LICENSE("GPL");