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