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  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation - version 2.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  18  *  02110-1301 USA.
  19  *
  20  *  Supports following chips:
  21  *
  22  *  Chip       #vin   #fanin #pwm #temp #dts wchipid  vendid  i2c  ISA
  23  *  w83795g     21     14     8     6     8    0x79   0x5ca3  yes   no
  24  *  w83795adg   18     14     2     6     8    0x79   0x5ca3  yes   no
  25  */
  26
  27 #include <linux/kernel.h>
  28 #include <linux/module.h>
  29 #include <linux/init.h>
  30 #include <linux/slab.h>
  31 #include <linux/i2c.h>
  32 #include <linux/hwmon.h>
  33 #include <linux/hwmon-sysfs.h>
  34 #include <linux/err.h>
  35 #include <linux/mutex.h>
  36 #include <linux/delay.h>
  37
  38 /* Addresses to scan */
  39 static const unsigned short normal_i2c[] = {
  40         0x2c, 0x2d, 0x2e, 0x2f, I2C_CLIENT_END
  41 };
  42
  43
  44 static int reset;
  45 module_param(reset, bool, 0);
  46 MODULE_PARM_DESC(reset, "Set to 1 to reset chip, not recommended");
  47
  48
  49 #define W83795_REG_BANKSEL              0x00
  50 #define W83795_REG_VENDORID             0xfd
  51 #define W83795_REG_CHIPID               0xfe
  52 #define W83795_REG_DEVICEID             0xfb
  53 #define W83795_REG_DEVICEID_A           0xff
  54
  55 #define W83795_REG_I2C_ADDR             0xfc
  56 #define W83795_REG_CONFIG               0x01
  57 #define W83795_REG_CONFIG_CONFIG48      0x04
  58 #define W83795_REG_CONFIG_START 0x01
  59
  60 /* Multi-Function Pin Ctrl Registers */
  61 #define W83795_REG_VOLT_CTRL1           0x02
  62 #define W83795_REG_VOLT_CTRL2           0x03
  63 #define W83795_REG_TEMP_CTRL1           0x04
  64 #define W83795_REG_TEMP_CTRL2           0x05
  65 #define W83795_REG_FANIN_CTRL1          0x06
  66 #define W83795_REG_FANIN_CTRL2          0x07
  67 #define W83795_REG_VMIGB_CTRL           0x08
  68
  69 #define TEMP_READ                       0
  70 #define TEMP_CRIT                       1
  71 #define TEMP_CRIT_HYST                  2
  72 #define TEMP_WARN                       3
  73 #define TEMP_WARN_HYST                  4
  74 /* only crit and crit_hyst affect real-time alarm status
  75  * current crit crit_hyst warn warn_hyst */
  76 static const u16 W83795_REG_TEMP[][5] = {
  77         {0x21, 0x96, 0x97, 0x98, 0x99}, /* TD1/TR1 */
  78         {0x22, 0x9a, 0x9b, 0x9c, 0x9d}, /* TD2/TR2 */
  79         {0x23, 0x9e, 0x9f, 0xa0, 0xa1}, /* TD3/TR3 */
  80         {0x24, 0xa2, 0xa3, 0xa4, 0xa5}, /* TD4/TR4 */
  81         {0x1f, 0xa6, 0xa7, 0xa8, 0xa9}, /* TR5 */
  82         {0x20, 0xaa, 0xab, 0xac, 0xad}, /* TR6 */
  83 };
  84
  85 #define IN_READ                         0
  86 #define IN_MAX                          1
  87 #define IN_LOW                          2
  88 static const u16 W83795_REG_IN[][3] = {
  89         /* Current, HL, LL */
  90         {0x10, 0x70, 0x71},     /* VSEN1 */
  91         {0x11, 0x72, 0x73},     /* VSEN2 */
  92         {0x12, 0x74, 0x75},     /* VSEN3 */
  93         {0x13, 0x76, 0x77},     /* VSEN4 */
  94         {0x14, 0x78, 0x79},     /* VSEN5 */
  95         {0x15, 0x7a, 0x7b},     /* VSEN6 */
  96         {0x16, 0x7c, 0x7d},     /* VSEN7 */
  97         {0x17, 0x7e, 0x7f},     /* VSEN8 */
  98         {0x18, 0x80, 0x81},     /* VSEN9 */
  99         {0x19, 0x82, 0x83},     /* VSEN10 */
 100         {0x1A, 0x84, 0x85},     /* VSEN11 */
 101         {0x1B, 0x86, 0x87},     /* VTT */
 102         {0x1C, 0x88, 0x89},     /* 3VDD */
 103         {0x1D, 0x8a, 0x8b},     /* 3VSB */
 104         {0x1E, 0x8c, 0x8d},     /* VBAT */
 105         {0x1F, 0xa6, 0xa7},     /* VSEN12 */
 106         {0x20, 0xaa, 0xab},     /* VSEN13 */
 107         {0x21, 0x96, 0x97},     /* VSEN14 */
 108         {0x22, 0x9a, 0x9b},     /* VSEN15 */
 109         {0x23, 0x9e, 0x9f},     /* VSEN16 */
 110         {0x24, 0xa2, 0xa3},     /* VSEN17 */
 111 };
 112 #define W83795_REG_VRLSB                0x3C
 113
 114 static const u8 W83795_REG_IN_HL_LSB[] = {
 115         0x8e,   /* VSEN1-4 */
 116         0x90,   /* VSEN5-8 */
 117         0x92,   /* VSEN9-11 */
 118         0x94,   /* VTT, 3VDD, 3VSB, 3VBAT */
 119         0xa8,   /* VSEN12 */
 120         0xac,   /* VSEN13 */
 121         0x98,   /* VSEN14 */
 122         0x9c,   /* VSEN15 */
 123         0xa0,   /* VSEN16 */
 124         0xa4,   /* VSEN17 */
 125 };
 126
 127 #define IN_LSB_REG(index, type) \
 128         (((type) == 1) ? W83795_REG_IN_HL_LSB[(index)] \
 129         : (W83795_REG_IN_HL_LSB[(index)] + 1))
 130
 131 #define IN_LSB_SHIFT                    0
 132 #define IN_LSB_IDX                      1
 133 static const u8 IN_LSB_SHIFT_IDX[][2] = {
 134         /* High/Low LSB shift, LSB No. */
 135         {0x00, 0x00},   /* VSEN1 */
 136         {0x02, 0x00},   /* VSEN2 */
 137         {0x04, 0x00},   /* VSEN3 */
 138         {0x06, 0x00},   /* VSEN4 */
 139         {0x00, 0x01},   /* VSEN5 */
 140         {0x02, 0x01},   /* VSEN6 */
 141         {0x04, 0x01},   /* VSEN7 */
 142         {0x06, 0x01},   /* VSEN8 */
 143         {0x00, 0x02},   /* VSEN9 */
 144         {0x02, 0x02},   /* VSEN10 */
 145         {0x04, 0x02},   /* VSEN11 */
 146         {0x00, 0x03},   /* VTT */
 147         {0x02, 0x03},   /* 3VDD */
 148         {0x04, 0x03},   /* 3VSB */
 149         {0x06, 0x03},   /* VBAT */
 150         {0x06, 0x04},   /* VSEN12 */
 151         {0x06, 0x05},   /* VSEN13 */
 152         {0x06, 0x06},   /* VSEN14 */
 153         {0x06, 0x07},   /* VSEN15 */
 154         {0x06, 0x08},   /* VSEN16 */
 155         {0x06, 0x09},   /* VSEN17 */
 156 };
 157
 158
 159 #define W83795_REG_FAN(index)           (0x2E + (index))
 160 #define W83795_REG_FAN_MIN_HL(index)    (0xB6 + (index))
 161 #define W83795_REG_FAN_MIN_LSB(index)   (0xC4 + (index) / 2)
 162 #define W83795_REG_FAN_MIN_LSB_SHIFT(index) \
 163         (((index) & 1) ? 4 : 0)
 164
 165 #define W83795_REG_VID_CTRL             0x6A
 166
 167 #define W83795_REG_ALARM(index)         (0x41 + (index))
 168 #define W83795_REG_BEEP(index)          (0x50 + (index))
 169
 170 #define W83795_REG_CLR_CHASSIS          0x4D
 171
 172
 173 #define W83795_REG_FCMS1                0x201
 174 #define W83795_REG_FCMS2                0x208
 175 #define W83795_REG_TFMR(index)          (0x202 + (index))
 176 #define W83795_REG_FOMC                 0x20F
 177
 178 #define W83795_REG_TSS(index)           (0x209 + (index))
 179
 180 #define PWM_OUTPUT                      0
 181 #define PWM_FREQ                        1
 182 #define PWM_START                       2
 183 #define PWM_NONSTOP                     3
 184 #define PWM_STOP_TIME                   4
 185 #define W83795_REG_PWM(index, nr)       (0x210 + (nr) * 8 + (index))
 186
 187 #define W83795_REG_FTSH(index)          (0x240 + (index) * 2)
 188 #define W83795_REG_FTSL(index)          (0x241 + (index) * 2)
 189 #define W83795_REG_TFTS                 0x250
 190
 191 #define TEMP_PWM_TTTI                   0
 192 #define TEMP_PWM_CTFS                   1
 193 #define TEMP_PWM_HCT                    2
 194 #define TEMP_PWM_HOT                    3
 195 #define W83795_REG_TTTI(index)          (0x260 + (index))
 196 #define W83795_REG_CTFS(index)          (0x268 + (index))
 197 #define W83795_REG_HT(index)            (0x270 + (index))
 198
 199 #define SF4_TEMP                        0
 200 #define SF4_PWM                         1
 201 #define W83795_REG_SF4_TEMP(temp_num, index) \
 202         (0x280 + 0x10 * (temp_num) + (index))
 203 #define W83795_REG_SF4_PWM(temp_num, index) \
 204         (0x288 + 0x10 * (temp_num) + (index))
 205
 206 #define W83795_REG_DTSC                 0x301
 207 #define W83795_REG_DTSE                 0x302
 208 #define W83795_REG_DTS(index)           (0x26 + (index))
 209 #define W83795_REG_PECI_TBASE(index)    (0x320 + (index))
 210
 211 #define DTS_CRIT                        0
 212 #define DTS_CRIT_HYST                   1
 213 #define DTS_WARN                        2
 214 #define DTS_WARN_HYST                   3
 215 #define W83795_REG_DTS_EXT(index)       (0xB2 + (index))
 216
 217 #define SETUP_PWM_DEFAULT               0
 218 #define SETUP_PWM_UPTIME                1
 219 #define SETUP_PWM_DOWNTIME              2
 220 #define W83795_REG_SETUP_PWM(index)    (0x20C + (index))
 221
 222 static inline u16 in_from_reg(u8 index, u16 val)
 223 {
 224         /* 3VDD, 3VSB and VBAT: 6 mV/bit; other inputs: 2 mV/bit */
 225         if (index >= 12 && index <= 14)
 226                 return val * 6;
 227         else
 228                 return val * 2;
 229 }
 230
 231 static inline u16 in_to_reg(u8 index, u16 val)
 232 {
 233         if (index >= 12 && index <= 14)
 234                 return val / 6;
 235         else
 236                 return val / 2;
 237 }
 238
 239 static inline unsigned long fan_from_reg(u16 val)
 240 {
 241         if ((val == 0xfff) || (val == 0))
 242                 return 0;
 243         return 1350000UL / val;
 244 }
 245
 246 static inline u16 fan_to_reg(long rpm)
 247 {
 248         if (rpm <= 0)
 249                 return 0x0fff;
 250         return SENSORS_LIMIT((1350000 + (rpm >> 1)) / rpm, 1, 0xffe);
 251 }
 252
 253 static inline unsigned long time_from_reg(u8 reg)
 254 {
 255         return reg * 100;
 256 }
 257
 258 static inline u8 time_to_reg(unsigned long val)
 259 {
 260         return SENSORS_LIMIT((val + 50) / 100, 0, 0xff);
 261 }
 262
 263 static inline long temp_from_reg(s8 reg)
 264 {
 265         return reg * 1000;
 266 }
 267
 268 static inline s8 temp_to_reg(long val, s8 min, s8 max)
 269 {
 270         return SENSORS_LIMIT(val / 1000, min, max);
 271 }
 272
 273 static const u16 pwm_freq_cksel0[16] = {
 274         1024, 512, 341, 256, 205, 171, 146, 128,
 275         85, 64, 32, 16, 8, 4, 2, 1
 276 };
 277
 278 static unsigned int pwm_freq_from_reg(u8 reg, u16 clkin)
 279 {
 280         unsigned long base_clock;
 281
 282         if (reg & 0x80) {
 283                 base_clock = clkin * 1000 / ((clkin == 48000) ? 384 : 256);
 284                 return base_clock / ((reg & 0x7f) + 1);
 285         } else
 286                 return pwm_freq_cksel0[reg & 0x0f];
 287 }
 288
 289 static u8 pwm_freq_to_reg(unsigned long val, u16 clkin)
 290 {
 291         unsigned long base_clock;
 292         u8 reg0, reg1;
 293         unsigned long best0, best1;
 294
 295         /* Best fit for cksel = 0 */
 296         for (reg0 = 0; reg0 < ARRAY_SIZE(pwm_freq_cksel0) - 1; reg0++) {
 297                 if (val > (pwm_freq_cksel0[reg0] +
 298                            pwm_freq_cksel0[reg0 + 1]) / 2)
 299                         break;
 300         }
 301         if (val < 375)  /* cksel = 1 can't beat this */
 302                 return reg0;
 303         best0 = pwm_freq_cksel0[reg0];
 304
 305         /* Best fit for cksel = 1 */
 306         base_clock = clkin * 1000 / ((clkin == 48000) ? 384 : 256);
 307         reg1 = SENSORS_LIMIT(DIV_ROUND_CLOSEST(base_clock, val), 1, 128);
 308         best1 = base_clock / reg1;
 309         reg1 = 0x80 | (reg1 - 1);
 310
 311         /* Choose the closest one */
 312         if (abs(val - best0) > abs(val - best1))
 313                 return reg1;
 314         else
 315                 return reg0;
 316 }
 317
 318 enum chip_types {w83795g, w83795adg};
 319
 320 struct w83795_data {
 321         struct device *hwmon_dev;
 322         struct mutex update_lock;
 323         unsigned long last_updated;     /* In jiffies */
 324         enum chip_types chip_type;
 325
 326         u8 bank;
 327
 328         u32 has_in;             /* Enable monitor VIN or not */
 329         u8 has_dyn_in;          /* Only in2-0 can have this */
 330         u16 in[21][3];          /* Register value, read/high/low */
 331         u8 in_lsb[10][3];       /* LSB Register value, high/low */
 332         u8 has_gain;            /* has gain: in17-20 * 8 */
 333
 334         u16 has_fan;            /* Enable fan14-1 or not */
 335         u16 fan[14];            /* Register value combine */
 336         u16 fan_min[14];        /* Register value combine */
 337
 338         u8 has_temp;            /* Enable monitor temp6-1 or not */
 339         s8 temp[6][5];          /* current, crit, crit_hyst, warn, warn_hyst */
 340         u8 temp_read_vrlsb[6];
 341         u8 temp_mode;           /* Bit vector, 0 = TR, 1 = TD */
 342         u8 temp_src[3];         /* Register value */
 343
 344         u8 enable_dts;          /* Enable PECI and SB-TSI,
 345                                  * bit 0: =1 enable, =0 disable,
 346                                  * bit 1: =1 AMD SB-TSI, =0 Intel PECI */
 347         u8 has_dts;             /* Enable monitor DTS temp */
 348         s8 dts[8];              /* Register value */
 349         u8 dts_read_vrlsb[8];   /* Register value */
 350         s8 dts_ext[4];          /* Register value */
 351
 352         u8 has_pwm;             /* 795g supports 8 pwm, 795adg only supports 2,
 353                                  * no config register, only affected by chip
 354                                  * type */
 355         u8 pwm[8][5];           /* Register value, output, freq, start,
 356                                  *  non stop, stop time */
 357         u16 clkin;              /* CLKIN frequency in kHz */
 358         u8 pwm_fcms[2];         /* Register value */
 359         u8 pwm_tfmr[6];         /* Register value */
 360         u8 pwm_fomc;            /* Register value */
 361
 362         u16 target_speed[8];    /* Register value, target speed for speed
 363                                  * cruise */
 364         u8 tol_speed;           /* tolerance of target speed */
 365         u8 pwm_temp[6][4];      /* TTTI, CTFS, HCT, HOT */
 366         u8 sf4_reg[6][2][7];    /* 6 temp, temp/dcpwm, 7 registers */
 367
 368         u8 setup_pwm[3];        /* Register value */
 369
 370         u8 alarms[6];           /* Register value */
 371         u8 beeps[6];            /* Register value */
 372
 373         char valid;
 374         char valid_limits;
 375         char valid_pwm_config;
 376 };
 377
 378 /*
 379  * Hardware access
 380  * We assume that nobdody can change the bank outside the driver.
 381  */
 382
 383 /* Must be called with data->update_lock held, except during initialization */
 384 static int w83795_set_bank(struct i2c_client *client, u8 bank)
 385 {
 386         struct w83795_data *data = i2c_get_clientdata(client);
 387         int err;
 388
 389         /* If the same bank is already set, nothing to do */
 390         if ((data->bank & 0x07) == bank)
 391                 return 0;
 392
 393         /* Change to new bank, preserve all other bits */
 394         bank |= data->bank & ~0x07;
 395         err = i2c_smbus_write_byte_data(client, W83795_REG_BANKSEL, bank);
 396         if (err < 0) {
 397                 dev_err(&client->dev,
 398                         "Failed to set bank to %d, err %d\n",
 399                         (int)bank, err);
 400                 return err;
 401         }
 402         data->bank = bank;
 403
 404         return 0;
 405 }
 406
 407 /* Must be called with data->update_lock held, except during initialization */
 408 static u8 w83795_read(struct i2c_client *client, u16 reg)
 409 {
 410         int err;
 411
 412         err = w83795_set_bank(client, reg >> 8);
 413         if (err < 0)
 414                 return 0x00;    /* Arbitrary */
 415
 416         err = i2c_smbus_read_byte_data(client, reg & 0xff);
 417         if (err < 0) {
 418                 dev_err(&client->dev,
 419                         "Failed to read from register 0x%03x, err %d\n",
 420                         (int)reg, err);
 421                 return 0x00;    /* Arbitrary */
 422         }
 423         return err;
 424 }
 425
 426 /* Must be called with data->update_lock held, except during initialization */
 427 static int w83795_write(struct i2c_client *client, u16 reg, u8 value)
 428 {
 429         int err;
 430
 431         err = w83795_set_bank(client, reg >> 8);
 432         if (err < 0)
 433                 return err;
 434
 435         err = i2c_smbus_write_byte_data(client, reg & 0xff, value);
 436         if (err < 0)
 437                 dev_err(&client->dev,
 438                         "Failed to write to register 0x%03x, err %d\n",
 439                         (int)reg, err);
 440         return err;
 441 }
 442
 443 static void w83795_update_limits(struct i2c_client *client)
 444 {
 445         struct w83795_data *data = i2c_get_clientdata(client);
 446         int i, limit;
 447
 448         /* Read the voltage limits */
 449         for (i = 0; i < ARRAY_SIZE(data->in); i++) {
 450                 if (!(data->has_in & (1 << i)))
 451                         continue;
 452                 data->in[i][IN_MAX] =
 453                         w83795_read(client, W83795_REG_IN[i][IN_MAX]);
 454                 data->in[i][IN_LOW] =
 455                         w83795_read(client, W83795_REG_IN[i][IN_LOW]);
 456         }
 457         for (i = 0; i < ARRAY_SIZE(data->in_lsb); i++) {
 458                 if ((i == 2 && data->chip_type == w83795adg) ||
 459                     (i >= 4 && !(data->has_in & (1 << (i + 11)))))
 460                         continue;
 461                 data->in_lsb[i][IN_MAX] =
 462                         w83795_read(client, IN_LSB_REG(i, IN_MAX));
 463                 data->in_lsb[i][IN_LOW] =
 464                         w83795_read(client, IN_LSB_REG(i, IN_LOW));
 465         }
 466
 467         /* Read the fan limits */
 468         for (i = 0; i < ARRAY_SIZE(data->fan); i++) {
 469                 u8 lsb;
 470
 471                 /* Each register contains LSB for 2 fans, but we want to
 472                  * read it only once to save time */
 473                 if ((i & 1) == 0 && (data->has_fan & (3 << i)))
 474                         lsb = w83795_read(client, W83795_REG_FAN_MIN_LSB(i));
 475
 476                 if (!(data->has_fan & (1 << i)))
 477                         continue;
 478                 data->fan_min[i] =
 479                         w83795_read(client, W83795_REG_FAN_MIN_HL(i)) << 4;
 480                 data->fan_min[i] |=
 481                         (lsb >> W83795_REG_FAN_MIN_LSB_SHIFT(i)) & 0x0F;
 482         }
 483
 484         /* Read the temperature limits */
 485         for (i = 0; i < ARRAY_SIZE(data->temp); i++) {
 486                 if (!(data->has_temp & (1 << i)))
 487                         continue;
 488                 for (limit = TEMP_CRIT; limit <= TEMP_WARN_HYST; limit++)
 489                         data->temp[i][limit] =
 490                                 w83795_read(client, W83795_REG_TEMP[i][limit]);
 491         }
 492
 493         /* Read the DTS limits */
 494         if (data->enable_dts) {
 495                 for (limit = DTS_CRIT; limit <= DTS_WARN_HYST; limit++)
 496                         data->dts_ext[limit] =
 497                                 w83795_read(client, W83795_REG_DTS_EXT(limit));
 498         }
 499
 500         /* Read beep settings */
 501         for (i = 0; i < ARRAY_SIZE(data->beeps); i++)
 502                 data->beeps[i] = w83795_read(client, W83795_REG_BEEP(i));
 503
 504         data->valid_limits = 1;
 505 }
 506
 507 static struct w83795_data *w83795_update_pwm_config(struct device *dev)
 508 {
 509         struct i2c_client *client = to_i2c_client(dev);
 510         struct w83795_data *data = i2c_get_clientdata(client);
 511         int i, tmp;
 512
 513         mutex_lock(&data->update_lock);
 514
 515         if (data->valid_pwm_config)
 516                 goto END;
 517
 518         /* Read temperature source selection */
 519         for (i = 0; i < ARRAY_SIZE(data->temp_src); i++)
 520                 data->temp_src[i] = w83795_read(client, W83795_REG_TSS(i));
 521
 522         /* Read automatic fan speed control settings */
 523         data->pwm_fcms[0] = w83795_read(client, W83795_REG_FCMS1);
 524         data->pwm_fcms[1] = w83795_read(client, W83795_REG_FCMS2);
 525         for (i = 0; i < ARRAY_SIZE(data->pwm_tfmr); i++)
 526                 data->pwm_tfmr[i] = w83795_read(client, W83795_REG_TFMR(i));
 527         data->pwm_fomc = w83795_read(client, W83795_REG_FOMC);
 528         for (i = 0; i < data->has_pwm; i++) {
 529                 for (tmp = PWM_FREQ; tmp <= PWM_STOP_TIME; tmp++)
 530                         data->pwm[i][tmp] =
 531                                 w83795_read(client, W83795_REG_PWM(i, tmp));
 532         }
 533         for (i = 0; i < ARRAY_SIZE(data->target_speed); i++) {
 534                 data->target_speed[i] =
 535                         w83795_read(client, W83795_REG_FTSH(i)) << 4;
 536                 data->target_speed[i] |=
 537                         w83795_read(client, W83795_REG_FTSL(i)) >> 4;
 538         }
 539         data->tol_speed = w83795_read(client, W83795_REG_TFTS) & 0x3f;
 540
 541         for (i = 0; i < ARRAY_SIZE(data->pwm_temp); i++) {
 542                 data->pwm_temp[i][TEMP_PWM_TTTI] =
 543                         w83795_read(client, W83795_REG_TTTI(i)) & 0x7f;
 544                 data->pwm_temp[i][TEMP_PWM_CTFS] =
 545                         w83795_read(client, W83795_REG_CTFS(i));
 546                 tmp = w83795_read(client, W83795_REG_HT(i));
 547                 data->pwm_temp[i][TEMP_PWM_HCT] = tmp >> 4;
 548                 data->pwm_temp[i][TEMP_PWM_HOT] = tmp & 0x0f;
 549         }
 550
 551         /* Read SmartFanIV trip points */
 552         for (i = 0; i < ARRAY_SIZE(data->sf4_reg); i++) {
 553                 for (tmp = 0; tmp < 7; tmp++) {
 554                         data->sf4_reg[i][SF4_TEMP][tmp] =
 555                                 w83795_read(client,
 556                                             W83795_REG_SF4_TEMP(i, tmp));
 557                         data->sf4_reg[i][SF4_PWM][tmp] =
 558                                 w83795_read(client, W83795_REG_SF4_PWM(i, tmp));
 559                 }
 560         }
 561
 562         /* Read setup PWM */
 563         for (i = 0; i < ARRAY_SIZE(data->setup_pwm); i++)
 564                 data->setup_pwm[i] =
 565                         w83795_read(client, W83795_REG_SETUP_PWM(i));
 566
 567         data->valid_pwm_config = 1;
 568
 569 END:
 570         mutex_unlock(&data->update_lock);
 571         return data;
 572 }
 573
 574 static struct w83795_data *w83795_update_device(struct device *dev)
 575 {
 576         struct i2c_client *client = to_i2c_client(dev);
 577         struct w83795_data *data = i2c_get_clientdata(client);
 578         u16 tmp;
 579         int i;
 580
 581         mutex_lock(&data->update_lock);
 582
 583         if (!data->valid_limits)
 584                 w83795_update_limits(client);
 585
 586         if (!(time_after(jiffies, data->last_updated + HZ * 2)
 587               || !data->valid))
 588                 goto END;
 589
 590         /* Update the voltages value */
 591         for (i = 0; i < ARRAY_SIZE(data->in); i++) {
 592                 if (!(data->has_in & (1 << i)))
 593                         continue;
 594                 tmp = w83795_read(client, W83795_REG_IN[i][IN_READ]) << 2;
 595                 tmp |= w83795_read(client, W83795_REG_VRLSB) >> 6;
 596                 data->in[i][IN_READ] = tmp;
 597         }
 598
 599         /* in0-2 can have dynamic limits (W83795G only) */
 600         if (data->has_dyn_in) {
 601                 u8 lsb_max = w83795_read(client, IN_LSB_REG(0, IN_MAX));
 602                 u8 lsb_low = w83795_read(client, IN_LSB_REG(0, IN_LOW));
 603
 604                 for (i = 0; i < 3; i++) {
 605                         if (!(data->has_dyn_in & (1 << i)))
 606                                 continue;
 607                         data->in[i][IN_MAX] =
 608                                 w83795_read(client, W83795_REG_IN[i][IN_MAX]);
 609                         data->in[i][IN_LOW] =
 610                                 w83795_read(client, W83795_REG_IN[i][IN_LOW]);
 611                         data->in_lsb[i][IN_MAX] = (lsb_max >> (2 * i)) & 0x03;
 612                         data->in_lsb[i][IN_LOW] = (lsb_low >> (2 * i)) & 0x03;
 613                 }
 614         }
 615
 616         /* Update fan */
 617         for (i = 0; i < ARRAY_SIZE(data->fan); i++) {
 618                 if (!(data->has_fan & (1 << i)))
 619                         continue;
 620                 data->fan[i] = w83795_read(client, W83795_REG_FAN(i)) << 4;
 621                 data->fan[i] |= w83795_read(client, W83795_REG_VRLSB) >> 4;
 622         }
 623
 624         /* Update temperature */
 625         for (i = 0; i < ARRAY_SIZE(data->temp); i++) {
 626                 data->temp[i][TEMP_READ] =
 627                         w83795_read(client, W83795_REG_TEMP[i][TEMP_READ]);
 628                 data->temp_read_vrlsb[i] =
 629                         w83795_read(client, W83795_REG_VRLSB);
 630         }
 631
 632         /* Update dts temperature */
 633         if (data->enable_dts) {
 634                 for (i = 0; i < ARRAY_SIZE(data->dts); i++) {
 635                         if (!(data->has_dts & (1 << i)))
 636                                 continue;
 637                         data->dts[i] =
 638                                 w83795_read(client, W83795_REG_DTS(i));
 639                         data->dts_read_vrlsb[i] =
 640                                 w83795_read(client, W83795_REG_VRLSB);
 641                 }
 642         }
 643
 644         /* Update pwm output */
 645         for (i = 0; i < data->has_pwm; i++) {
 646                 data->pwm[i][PWM_OUTPUT] =
 647                     w83795_read(client, W83795_REG_PWM(i, PWM_OUTPUT));
 648         }
 649
 650         /* update alarm */
 651         for (i = 0; i < ARRAY_SIZE(data->alarms); i++)
 652                 data->alarms[i] = w83795_read(client, W83795_REG_ALARM(i));
 653
 654         data->last_updated = jiffies;
 655         data->valid = 1;
 656
 657 END:
 658         mutex_unlock(&data->update_lock);
 659         return data;
 660 }
 661
 662 /*
 663  * Sysfs attributes
 664  */
 665
 666 #define ALARM_STATUS      0
 667 #define BEEP_ENABLE       1
 668 static ssize_t
 669 show_alarm_beep(struct device *dev, struct device_attribute *attr, char *buf)
 670 {
 671         struct w83795_data *data = w83795_update_device(dev);
 672         struct sensor_device_attribute_2 *sensor_attr =
 673             to_sensor_dev_attr_2(attr);
 674         int nr = sensor_attr->nr;
 675         int index = sensor_attr->index >> 3;
 676         int bit = sensor_attr->index & 0x07;
 677         u8 val;
 678
 679         if (nr == ALARM_STATUS)
 680                 val = (data->alarms[index] >> bit) & 1;
 681         else            /* BEEP_ENABLE */
 682                 val = (data->beeps[index] >> bit) & 1;
 683
 684         return sprintf(buf, "%u\n", val);
 685 }
 686
 687 static ssize_t
 688 store_beep(struct device *dev, struct device_attribute *attr,
 689            const char *buf, size_t count)
 690 {
 691         struct i2c_client *client = to_i2c_client(dev);
 692         struct w83795_data *data = i2c_get_clientdata(client);
 693         struct sensor_device_attribute_2 *sensor_attr =
 694             to_sensor_dev_attr_2(attr);
 695         int index = sensor_attr->index >> 3;
 696         int shift = sensor_attr->index & 0x07;
 697         u8 beep_bit = 1 << shift;
 698         unsigned long val;
 699
 700         if (strict_strtoul(buf, 10, &val) < 0)
 701                 return -EINVAL;
 702         if (val != 0 && val != 1)
 703                 return -EINVAL;
 704
 705         mutex_lock(&data->update_lock);
 706         data->beeps[index] = w83795_read(client, W83795_REG_BEEP(index));
 707         data->beeps[index] &= ~beep_bit;
 708         data->beeps[index] |= val << shift;
 709         w83795_write(client, W83795_REG_BEEP(index), data->beeps[index]);
 710         mutex_unlock(&data->update_lock);
 711
 712         return count;
 713 }
 714
 715 /* Write any value to clear chassis alarm */
 716 static ssize_t
 717 store_chassis_clear(struct device *dev,
 718                     struct device_attribute *attr, const char *buf,
 719                     size_t count)
 720 {
 721         struct i2c_client *client = to_i2c_client(dev);
 722         struct w83795_data *data = i2c_get_clientdata(client);
 723         u8 val;
 724
 725         mutex_lock(&data->update_lock);
 726         val = w83795_read(client, W83795_REG_CLR_CHASSIS);
 727         val |= 0x80;
 728         w83795_write(client, W83795_REG_CLR_CHASSIS, val);
 729         mutex_unlock(&data->update_lock);
 730         return count;
 731 }
 732
 733 #define FAN_INPUT     0
 734 #define FAN_MIN       1
 735 static ssize_t
 736 show_fan(struct device *dev, struct device_attribute *attr, char *buf)
 737 {
 738         struct sensor_device_attribute_2 *sensor_attr =
 739             to_sensor_dev_attr_2(attr);
 740         int nr = sensor_attr->nr;
 741         int index = sensor_attr->index;
 742         struct w83795_data *data = w83795_update_device(dev);
 743         u16 val;
 744
 745         if (nr == FAN_INPUT)
 746                 val = data->fan[index] & 0x0fff;
 747         else
 748                 val = data->fan_min[index] & 0x0fff;
 749
 750         return sprintf(buf, "%lu\n", fan_from_reg(val));
 751 }
 752
 753 static ssize_t
 754 store_fan_min(struct device *dev, struct device_attribute *attr,
 755               const char *buf, size_t count)
 756 {
 757         struct sensor_device_attribute_2 *sensor_attr =
 758             to_sensor_dev_attr_2(attr);
 759         int index = sensor_attr->index;
 760         struct i2c_client *client = to_i2c_client(dev);
 761         struct w83795_data *data = i2c_get_clientdata(client);
 762         unsigned long val;
 763
 764         if (strict_strtoul(buf, 10, &val))
 765                 return -EINVAL;
 766         val = fan_to_reg(val);
 767
 768         mutex_lock(&data->update_lock);
 769         data->fan_min[index] = val;
 770         w83795_write(client, W83795_REG_FAN_MIN_HL(index), (val >> 4) & 0xff);
 771         val &= 0x0f;
 772         if (index & 1) {
 773                 val <<= 4;
 774                 val |= w83795_read(client, W83795_REG_FAN_MIN_LSB(index))
 775                        & 0x0f;
 776         } else {
 777                 val |= w83795_read(client, W83795_REG_FAN_MIN_LSB(index))
 778                        & 0xf0;
 779         }
 780         w83795_write(client, W83795_REG_FAN_MIN_LSB(index), val & 0xff);
 781         mutex_unlock(&data->update_lock);
 782
 783         return count;
 784 }
 785
 786 static ssize_t
 787 show_pwm(struct device *dev, struct device_attribute *attr, char *buf)
 788 {
 789         struct w83795_data *data;
 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         unsigned int val;
 795
 796         data = nr == PWM_OUTPUT ? w83795_update_device(dev)
 797                                 : w83795_update_pwm_config(dev);
 798
 799         switch (nr) {
 800         case PWM_STOP_TIME:
 801                 val = time_from_reg(data->pwm[index][nr]);
 802                 break;
 803         case PWM_FREQ:
 804                 val = pwm_freq_from_reg(data->pwm[index][nr], data->clkin);
 805                 break;
 806         default:
 807                 val = data->pwm[index][nr];
 808                 break;
 809         }
 810
 811         return sprintf(buf, "%u\n", val);
 812 }
 813
 814 static ssize_t
 815 store_pwm(struct device *dev, struct device_attribute *attr,
 816           const char *buf, size_t count)
 817 {
 818         struct i2c_client *client = to_i2c_client(dev);
 819         struct w83795_data *data = i2c_get_clientdata(client);
 820         struct sensor_device_attribute_2 *sensor_attr =
 821             to_sensor_dev_attr_2(attr);
 822         int nr = sensor_attr->nr;
 823         int index = sensor_attr->index;
 824         unsigned long val;
 825
 826         if (strict_strtoul(buf, 10, &val) < 0)
 827                 return -EINVAL;
 828
 829         mutex_lock(&data->update_lock);
 830         switch (nr) {
 831         case PWM_STOP_TIME:
 832                 val = time_to_reg(val);
 833                 break;
 834         case PWM_FREQ:
 835                 val = pwm_freq_to_reg(val, data->clkin);
 836                 break;
 837         default:
 838                 val = SENSORS_LIMIT(val, 0, 0xff);
 839                 break;
 840         }
 841         w83795_write(client, W83795_REG_PWM(index, nr), val);
 842         data->pwm[index][nr] = val;
 843         mutex_unlock(&data->update_lock);
 844         return count;
 845 }
 846
 847 static ssize_t
 848 show_pwm_enable(struct device *dev, struct device_attribute *attr, char *buf)
 849 {
 850         struct sensor_device_attribute_2 *sensor_attr =
 851             to_sensor_dev_attr_2(attr);
 852         struct w83795_data *data = w83795_update_pwm_config(dev);
 853         int index = sensor_attr->index;
 854         u8 tmp;
 855
 856         if (1 == (data->pwm_fcms[0] & (1 << index))) {
 857                 tmp = 2;
 858                 goto out;
 859         }
 860         for (tmp = 0; tmp < 6; tmp++) {
 861                 if (data->pwm_tfmr[tmp] & (1 << index)) {
 862                         tmp = 3;
 863                         goto out;
 864                 }
 865         }
 866         if (data->pwm_fomc & (1 << index))
 867                 tmp = 0;
 868         else
 869                 tmp = 1;
 870
 871 out:
 872         return sprintf(buf, "%u\n", tmp);
 873 }
 874
 875 static ssize_t
 876 store_pwm_enable(struct device *dev, struct device_attribute *attr,
 877           const char *buf, size_t count)
 878 {
 879         struct i2c_client *client = to_i2c_client(dev);
 880         struct w83795_data *data = w83795_update_pwm_config(dev);
 881         struct sensor_device_attribute_2 *sensor_attr =
 882             to_sensor_dev_attr_2(attr);
 883         int index = sensor_attr->index;
 884         unsigned long val;
 885         int i;
 886
 887         if (strict_strtoul(buf, 10, &val) < 0)
 888                 return -EINVAL;
 889         if (val > 2)
 890                 return -EINVAL;
 891
 892         mutex_lock(&data->update_lock);
 893         switch (val) {
 894         case 0:
 895         case 1:
 896                 data->pwm_fcms[0] &= ~(1 << index);
 897                 w83795_write(client, W83795_REG_FCMS1, data->pwm_fcms[0]);
 898                 for (i = 0; i < 6; i++) {
 899                         data->pwm_tfmr[i] &= ~(1 << index);
 900                         w83795_write(client, W83795_REG_TFMR(i),
 901                                 data->pwm_tfmr[i]);
 902                 }
 903                 data->pwm_fomc |= 1 << index;
 904                 data->pwm_fomc ^= val << index;
 905                 w83795_write(client, W83795_REG_FOMC, data->pwm_fomc);
 906                 break;
 907         case 2:
 908                 data->pwm_fcms[0] |= (1 << index);
 909                 w83795_write(client, W83795_REG_FCMS1, data->pwm_fcms[0]);
 910                 break;
 911         }
 912         mutex_unlock(&data->update_lock);
 913         return count;
 914 }
 915
 916 static ssize_t
 917 show_temp_src(struct device *dev, struct device_attribute *attr, char *buf)
 918 {
 919         struct sensor_device_attribute_2 *sensor_attr =
 920             to_sensor_dev_attr_2(attr);
 921         struct w83795_data *data = w83795_update_pwm_config(dev);
 922         int index = sensor_attr->index;
 923         u8 val = index / 2;
 924         u8 tmp = data->temp_src[val];
 925
 926         if (index & 1)
 927                 val = 4;
 928         else
 929                 val = 0;
 930         tmp >>= val;
 931         tmp &= 0x0f;
 932
 933         return sprintf(buf, "%u\n", tmp);
 934 }
 935
 936 static ssize_t
 937 store_temp_src(struct device *dev, struct device_attribute *attr,
 938           const char *buf, size_t count)
 939 {
 940         struct i2c_client *client = to_i2c_client(dev);
 941         struct w83795_data *data = w83795_update_pwm_config(dev);
 942         struct sensor_device_attribute_2 *sensor_attr =
 943             to_sensor_dev_attr_2(attr);
 944         int index = sensor_attr->index;
 945         unsigned long tmp;
 946         u8 val = index / 2;
 947
 948         if (strict_strtoul(buf, 10, &tmp) < 0)
 949                 return -EINVAL;
 950         tmp = SENSORS_LIMIT(tmp, 0, 15);
 951
 952         mutex_lock(&data->update_lock);
 953         if (index & 1) {
 954                 tmp <<= 4;
 955                 data->temp_src[val] &= 0x0f;
 956         } else {
 957                 data->temp_src[val] &= 0xf0;
 958         }
 959         data->temp_src[val] |= tmp;
 960         w83795_write(client, W83795_REG_TSS(val), data->temp_src[val]);
 961         mutex_unlock(&data->update_lock);
 962
 963         return count;
 964 }
 965
 966 #define TEMP_PWM_ENABLE   0
 967 #define TEMP_PWM_FAN_MAP  1
 968 static ssize_t
 969 show_temp_pwm_enable(struct device *dev, struct device_attribute *attr,
 970                      char *buf)
 971 {
 972         struct w83795_data *data = w83795_update_pwm_config(dev);
 973         struct sensor_device_attribute_2 *sensor_attr =
 974             to_sensor_dev_attr_2(attr);
 975         int nr = sensor_attr->nr;
 976         int index = sensor_attr->index;
 977         u8 tmp = 0xff;
 978
 979         switch (nr) {
 980         case TEMP_PWM_ENABLE:
 981                 tmp = (data->pwm_fcms[1] >> index) & 1;
 982                 if (tmp)
 983                         tmp = 4;
 984                 else
 985                         tmp = 3;
 986                 break;
 987         case TEMP_PWM_FAN_MAP:
 988                 tmp = data->pwm_tfmr[index];
 989                 break;
 990         }
 991
 992         return sprintf(buf, "%u\n", tmp);
 993 }
 994
 995 static ssize_t
 996 store_temp_pwm_enable(struct device *dev, struct device_attribute *attr,
 997           const char *buf, size_t count)
 998 {
 999         struct i2c_client *client = to_i2c_client(dev);
1000         struct w83795_data *data = w83795_update_pwm_config(dev);
1001         struct sensor_device_attribute_2 *sensor_attr =
1002             to_sensor_dev_attr_2(attr);
1003         int nr = sensor_attr->nr;
1004         int index = sensor_attr->index;
1005         unsigned long tmp;
1006
1007         if (strict_strtoul(buf, 10, &tmp) < 0)
1008                 return -EINVAL;
1009
1010         switch (nr) {
1011         case TEMP_PWM_ENABLE:
1012                 if (tmp != 3 && tmp != 4)
1013                         return -EINVAL;
1014                 tmp -= 3;
1015                 mutex_lock(&data->update_lock);
1016                 data->pwm_fcms[1] &= ~(1 << index);
1017                 data->pwm_fcms[1] |= tmp << index;
1018                 w83795_write(client, W83795_REG_FCMS2, data->pwm_fcms[1]);
1019                 mutex_unlock(&data->update_lock);
1020                 break;
1021         case TEMP_PWM_FAN_MAP:
1022                 mutex_lock(&data->update_lock);
1023                 tmp = SENSORS_LIMIT(tmp, 0, 0xff);
1024                 w83795_write(client, W83795_REG_TFMR(index), tmp);
1025                 data->pwm_tfmr[index] = tmp;
1026                 mutex_unlock(&data->update_lock);
1027                 break;
1028         }
1029         return count;
1030 }
1031
1032 #define FANIN_TARGET   0
1033 #define FANIN_TOL      1
1034 static ssize_t
1035 show_fanin(struct device *dev, struct device_attribute *attr, char *buf)
1036 {
1037         struct w83795_data *data = w83795_update_pwm_config(dev);
1038         struct sensor_device_attribute_2 *sensor_attr =
1039             to_sensor_dev_attr_2(attr);
1040         int nr = sensor_attr->nr;
1041         int index = sensor_attr->index;
1042         u16 tmp = 0;
1043
1044         switch (nr) {
1045         case FANIN_TARGET:
1046                 tmp = fan_from_reg(data->target_speed[index]);
1047                 break;
1048         case FANIN_TOL:
1049                 tmp = data->tol_speed;
1050                 break;
1051         }
1052
1053         return sprintf(buf, "%u\n", tmp);
1054 }
1055
1056 static ssize_t
1057 store_fanin(struct device *dev, struct device_attribute *attr,
1058           const char *buf, size_t count)
1059 {
1060         struct i2c_client *client = to_i2c_client(dev);
1061         struct w83795_data *data = i2c_get_clientdata(client);
1062         struct sensor_device_attribute_2 *sensor_attr =
1063             to_sensor_dev_attr_2(attr);
1064         int nr = sensor_attr->nr;
1065         int index = sensor_attr->index;
1066         unsigned long val;
1067
1068         if (strict_strtoul(buf, 10, &val) < 0)
1069                 return -EINVAL;
1070
1071         mutex_lock(&data->update_lock);
1072         switch (nr) {
1073         case FANIN_TARGET:
1074                 val = fan_to_reg(SENSORS_LIMIT(val, 0, 0xfff));
1075                 w83795_write(client, W83795_REG_FTSH(index), val >> 4);
1076                 w83795_write(client, W83795_REG_FTSL(index), (val << 4) & 0xf0);
1077                 data->target_speed[index] = val;
1078                 break;
1079         case FANIN_TOL:
1080                 val = SENSORS_LIMIT(val, 0, 0x3f);
1081                 w83795_write(client, W83795_REG_TFTS, val);
1082                 data->tol_speed = val;
1083                 break;
1084         }
1085         mutex_unlock(&data->update_lock);
1086
1087         return count;
1088 }
1089
1090
1091 static ssize_t
1092 show_temp_pwm(struct device *dev, struct device_attribute *attr, char *buf)
1093 {
1094         struct w83795_data *data = w83795_update_pwm_config(dev);
1095         struct sensor_device_attribute_2 *sensor_attr =
1096             to_sensor_dev_attr_2(attr);
1097         int nr = sensor_attr->nr;
1098         int index = sensor_attr->index;
1099         long tmp = temp_from_reg(data->pwm_temp[index][nr]);
1100
1101         return sprintf(buf, "%ld\n", tmp);
1102 }
1103
1104 static ssize_t
1105 store_temp_pwm(struct device *dev, struct device_attribute *attr,
1106           const char *buf, size_t count)
1107 {
1108         struct i2c_client *client = to_i2c_client(dev);
1109         struct w83795_data *data = i2c_get_clientdata(client);
1110         struct sensor_device_attribute_2 *sensor_attr =
1111             to_sensor_dev_attr_2(attr);
1112         int nr = sensor_attr->nr;
1113         int index = sensor_attr->index;
1114         unsigned long val;
1115         u8 tmp;
1116
1117         if (strict_strtoul(buf, 10, &val) < 0)
1118                 return -EINVAL;
1119         val /= 1000;
1120
1121         mutex_lock(&data->update_lock);
1122         switch (nr) {
1123         case TEMP_PWM_TTTI:
1124                 val = SENSORS_LIMIT(val, 0, 0x7f);
1125                 w83795_write(client, W83795_REG_TTTI(index), val);
1126                 break;
1127         case TEMP_PWM_CTFS:
1128                 val = SENSORS_LIMIT(val, 0, 0x7f);
1129                 w83795_write(client, W83795_REG_CTFS(index), val);
1130                 break;
1131         case TEMP_PWM_HCT:
1132                 val = SENSORS_LIMIT(val, 0, 0x0f);
1133                 tmp = w83795_read(client, W83795_REG_HT(index));
1134                 tmp &= 0x0f;
1135                 tmp |= (val << 4) & 0xf0;
1136                 w83795_write(client, W83795_REG_HT(index), tmp);
1137                 break;
1138         case TEMP_PWM_HOT:
1139                 val = SENSORS_LIMIT(val, 0, 0x0f);
1140                 tmp = w83795_read(client, W83795_REG_HT(index));
1141                 tmp &= 0xf0;
1142                 tmp |= val & 0x0f;
1143                 w83795_write(client, W83795_REG_HT(index), tmp);
1144                 break;
1145         }
1146         data->pwm_temp[index][nr] = val;
1147         mutex_unlock(&data->update_lock);
1148
1149         return count;
1150 }
1151
1152 static ssize_t
1153 show_sf4_pwm(struct device *dev, struct device_attribute *attr, char *buf)
1154 {
1155         struct w83795_data *data = w83795_update_pwm_config(dev);
1156         struct sensor_device_attribute_2 *sensor_attr =
1157             to_sensor_dev_attr_2(attr);
1158         int nr = sensor_attr->nr;
1159         int index = sensor_attr->index;
1160
1161         return sprintf(buf, "%u\n", data->sf4_reg[index][SF4_PWM][nr]);
1162 }
1163
1164 static ssize_t
1165 store_sf4_pwm(struct device *dev, struct device_attribute *attr,
1166           const char *buf, size_t count)
1167 {
1168         struct i2c_client *client = to_i2c_client(dev);
1169         struct w83795_data *data = i2c_get_clientdata(client);
1170         struct sensor_device_attribute_2 *sensor_attr =
1171             to_sensor_dev_attr_2(attr);
1172         int nr = sensor_attr->nr;
1173         int index = sensor_attr->index;
1174         unsigned long val;
1175
1176         if (strict_strtoul(buf, 10, &val) < 0)
1177                 return -EINVAL;
1178
1179         mutex_lock(&data->update_lock);
1180         w83795_write(client, W83795_REG_SF4_PWM(index, nr), val);
1181         data->sf4_reg[index][SF4_PWM][nr] = val;
1182         mutex_unlock(&data->update_lock);
1183
1184         return count;
1185 }
1186
1187 static ssize_t
1188 show_sf4_temp(struct device *dev, struct device_attribute *attr, char *buf)
1189 {
1190         struct w83795_data *data = w83795_update_pwm_config(dev);
1191         struct sensor_device_attribute_2 *sensor_attr =
1192             to_sensor_dev_attr_2(attr);
1193         int nr = sensor_attr->nr;
1194         int index = sensor_attr->index;
1195
1196         return sprintf(buf, "%u\n",
1197                 (data->sf4_reg[index][SF4_TEMP][nr]) * 1000);
1198 }
1199
1200 static ssize_t
1201 store_sf4_temp(struct device *dev, struct device_attribute *attr,
1202           const char *buf, size_t count)
1203 {
1204         struct i2c_client *client = to_i2c_client(dev);
1205         struct w83795_data *data = i2c_get_clientdata(client);
1206         struct sensor_device_attribute_2 *sensor_attr =
1207             to_sensor_dev_attr_2(attr);
1208         int nr = sensor_attr->nr;
1209         int index = sensor_attr->index;
1210         unsigned long val;
1211
1212         if (strict_strtoul(buf, 10, &val) < 0)
1213                 return -EINVAL;
1214         val /= 1000;
1215
1216         mutex_lock(&data->update_lock);
1217         w83795_write(client, W83795_REG_SF4_TEMP(index, nr), val);
1218         data->sf4_reg[index][SF4_TEMP][nr] = val;
1219         mutex_unlock(&data->update_lock);
1220
1221         return count;
1222 }
1223
1224
1225 static ssize_t
1226 show_temp(struct device *dev, struct device_attribute *attr, char *buf)
1227 {
1228         struct sensor_device_attribute_2 *sensor_attr =
1229             to_sensor_dev_attr_2(attr);
1230         int nr = sensor_attr->nr;
1231         int index = sensor_attr->index;
1232         struct w83795_data *data = w83795_update_device(dev);
1233         long temp = temp_from_reg(data->temp[index][nr]);
1234
1235         if (nr == TEMP_READ)
1236                 temp += (data->temp_read_vrlsb[index] >> 6) * 250;
1237         return sprintf(buf, "%ld\n", temp);
1238 }
1239
1240 static ssize_t
1241 store_temp(struct device *dev, struct device_attribute *attr,
1242            const char *buf, size_t count)
1243 {
1244         struct sensor_device_attribute_2 *sensor_attr =
1245             to_sensor_dev_attr_2(attr);
1246         int nr = sensor_attr->nr;
1247         int index = sensor_attr->index;
1248         struct i2c_client *client = to_i2c_client(dev);
1249         struct w83795_data *data = i2c_get_clientdata(client);
1250         long tmp;
1251
1252         if (strict_strtol(buf, 10, &tmp) < 0)
1253                 return -EINVAL;
1254
1255         mutex_lock(&data->update_lock);
1256         data->temp[index][nr] = temp_to_reg(tmp, -128, 127);
1257         w83795_write(client, W83795_REG_TEMP[index][nr], data->temp[index][nr]);
1258         mutex_unlock(&data->update_lock);
1259         return count;
1260 }
1261
1262
1263 static ssize_t
1264 show_dts_mode(struct device *dev, struct device_attribute *attr, char *buf)
1265 {
1266         struct w83795_data *data = dev_get_drvdata(dev);
1267         int tmp;
1268
1269         if (data->enable_dts & 2)
1270                 tmp = 5;
1271         else
1272                 tmp = 6;
1273
1274         return sprintf(buf, "%d\n", tmp);
1275 }
1276
1277 static ssize_t
1278 show_dts(struct device *dev, struct device_attribute *attr, char *buf)
1279 {
1280         struct sensor_device_attribute_2 *sensor_attr =
1281             to_sensor_dev_attr_2(attr);
1282         int index = sensor_attr->index;
1283         struct w83795_data *data = w83795_update_device(dev);
1284         long temp = temp_from_reg(data->dts[index]);
1285
1286         temp += (data->dts_read_vrlsb[index] >> 6) * 250;
1287         return sprintf(buf, "%ld\n", temp);
1288 }
1289
1290 static ssize_t
1291 show_dts_ext(struct device *dev, struct device_attribute *attr, char *buf)
1292 {
1293         struct sensor_device_attribute_2 *sensor_attr =
1294             to_sensor_dev_attr_2(attr);
1295         int nr = sensor_attr->nr;
1296         struct w83795_data *data = dev_get_drvdata(dev);
1297         long temp = temp_from_reg(data->dts_ext[nr]);
1298
1299         return sprintf(buf, "%ld\n", temp);
1300 }
1301
1302 static ssize_t
1303 store_dts_ext(struct device *dev, struct device_attribute *attr,
1304            const char *buf, size_t count)
1305 {
1306         struct sensor_device_attribute_2 *sensor_attr =
1307             to_sensor_dev_attr_2(attr);
1308         int nr = sensor_attr->nr;
1309         struct i2c_client *client = to_i2c_client(dev);
1310         struct w83795_data *data = i2c_get_clientdata(client);
1311         long tmp;
1312
1313         if (strict_strtol(buf, 10, &tmp) < 0)
1314                 return -EINVAL;
1315
1316         mutex_lock(&data->update_lock);
1317         data->dts_ext[nr] = temp_to_reg(tmp, -128, 127);
1318         w83795_write(client, W83795_REG_DTS_EXT(nr), data->dts_ext[nr]);
1319         mutex_unlock(&data->update_lock);
1320         return count;
1321 }
1322
1323
1324 static ssize_t
1325 show_temp_mode(struct device *dev, struct device_attribute *attr, char *buf)
1326 {
1327         struct w83795_data *data = dev_get_drvdata(dev);
1328         struct sensor_device_attribute_2 *sensor_attr =
1329             to_sensor_dev_attr_2(attr);
1330         int index = sensor_attr->index;
1331         int tmp;
1332
1333         if (data->temp_mode & (1 << index))
1334                 tmp = 3;        /* Thermal diode */
1335         else
1336                 tmp = 4;        /* Thermistor */
1337
1338         return sprintf(buf, "%d\n", tmp);
1339 }
1340
1341 /* Only for temp1-4 (temp5-6 can only be thermistor) */
1342 static ssize_t
1343 store_temp_mode(struct device *dev, struct device_attribute *attr,
1344                 const char *buf, size_t count)
1345 {
1346         struct i2c_client *client = to_i2c_client(dev);
1347         struct w83795_data *data = i2c_get_clientdata(client);
1348         struct sensor_device_attribute_2 *sensor_attr =
1349             to_sensor_dev_attr_2(attr);
1350         int index = sensor_attr->index;
1351         int reg_shift;
1352         unsigned long val;
1353         u8 tmp;
1354
1355         if (strict_strtoul(buf, 10, &val) < 0)
1356                 return -EINVAL;
1357         if ((val != 4) && (val != 3))
1358                 return -EINVAL;
1359
1360         mutex_lock(&data->update_lock);
1361         if (val == 3) {
1362                 /* Thermal diode */
1363                 val = 0x01;
1364                 data->temp_mode |= 1 << index;
1365         } else if (val == 4) {
1366                 /* Thermistor */
1367                 val = 0x03;
1368                 data->temp_mode &= ~(1 << index);
1369         }
1370
1371         reg_shift = 2 * index;
1372         tmp = w83795_read(client, W83795_REG_TEMP_CTRL2);
1373         tmp &= ~(0x03 << reg_shift);
1374         tmp |= val << reg_shift;
1375         w83795_write(client, W83795_REG_TEMP_CTRL2, tmp);
1376
1377         mutex_unlock(&data->update_lock);
1378         return count;
1379 }
1380
1381
1382 /* show/store VIN */
1383 static ssize_t
1384 show_in(struct device *dev, struct device_attribute *attr, char *buf)
1385 {
1386         struct sensor_device_attribute_2 *sensor_attr =
1387             to_sensor_dev_attr_2(attr);
1388         int nr = sensor_attr->nr;
1389         int index = sensor_attr->index;
1390         struct w83795_data *data = w83795_update_device(dev);
1391         u16 val = data->in[index][nr];
1392         u8 lsb_idx;
1393
1394         switch (nr) {
1395         case IN_READ:
1396                 /* calculate this value again by sensors as sensors3.conf */
1397                 if ((index >= 17) &&
1398                     !((data->has_gain >> (index - 17)) & 1))
1399                         val *= 8;
1400                 break;
1401         case IN_MAX:
1402         case IN_LOW:
1403                 lsb_idx = IN_LSB_SHIFT_IDX[index][IN_LSB_IDX];
1404                 val <<= 2;
1405                 val |= (data->in_lsb[lsb_idx][nr] >>
1406                         IN_LSB_SHIFT_IDX[index][IN_LSB_SHIFT]) & 0x03;
1407                 if ((index >= 17) &&
1408                     !((data->has_gain >> (index - 17)) & 1))
1409                         val *= 8;
1410                 break;
1411         }
1412         val = in_from_reg(index, val);
1413
1414         return sprintf(buf, "%d\n", val);
1415 }
1416
1417 static ssize_t
1418 store_in(struct device *dev, struct device_attribute *attr,
1419          const char *buf, size_t count)
1420 {
1421         struct sensor_device_attribute_2 *sensor_attr =
1422             to_sensor_dev_attr_2(attr);
1423         int nr = sensor_attr->nr;
1424         int index = sensor_attr->index;
1425         struct i2c_client *client = to_i2c_client(dev);
1426         struct w83795_data *data = i2c_get_clientdata(client);
1427         unsigned long val;
1428         u8 tmp;
1429         u8 lsb_idx;
1430
1431         if (strict_strtoul(buf, 10, &val) < 0)
1432                 return -EINVAL;
1433         val = in_to_reg(index, val);
1434
1435         if ((index >= 17) &&
1436             !((data->has_gain >> (index - 17)) & 1))
1437                 val /= 8;
1438         val = SENSORS_LIMIT(val, 0, 0x3FF);
1439         mutex_lock(&data->update_lock);
1440
1441         lsb_idx = IN_LSB_SHIFT_IDX[index][IN_LSB_IDX];
1442         tmp = w83795_read(client, IN_LSB_REG(lsb_idx, nr));
1443         tmp &= ~(0x03 << IN_LSB_SHIFT_IDX[index][IN_LSB_SHIFT]);
1444         tmp |= (val & 0x03) << IN_LSB_SHIFT_IDX[index][IN_LSB_SHIFT];
1445         w83795_write(client, IN_LSB_REG(lsb_idx, nr), tmp);
1446         data->in_lsb[lsb_idx][nr] = tmp;
1447
1448         tmp = (val >> 2) & 0xff;
1449         w83795_write(client, W83795_REG_IN[index][nr], tmp);
1450         data->in[index][nr] = tmp;
1451
1452         mutex_unlock(&data->update_lock);
1453         return count;
1454 }
1455
1456
1457 static ssize_t
1458 show_sf_setup(struct device *dev, struct device_attribute *attr, char *buf)
1459 {
1460         struct sensor_device_attribute_2 *sensor_attr =
1461             to_sensor_dev_attr_2(attr);
1462         int nr = sensor_attr->nr;
1463         struct w83795_data *data = w83795_update_pwm_config(dev);
1464         u16 val = data->setup_pwm[nr];
1465
1466         switch (nr) {
1467         case SETUP_PWM_UPTIME:
1468         case SETUP_PWM_DOWNTIME:
1469                 val = time_from_reg(val);
1470                 break;
1471         }
1472
1473         return sprintf(buf, "%d\n", val);
1474 }
1475
1476 static ssize_t
1477 store_sf_setup(struct device *dev, struct device_attribute *attr,
1478          const char *buf, size_t count)
1479 {
1480         struct sensor_device_attribute_2 *sensor_attr =
1481             to_sensor_dev_attr_2(attr);
1482         int nr = sensor_attr->nr;
1483         struct i2c_client *client = to_i2c_client(dev);
1484         struct w83795_data *data = i2c_get_clientdata(client);
1485         unsigned long val;
1486
1487         if (strict_strtoul(buf, 10, &val) < 0)
1488                 return -EINVAL;
1489
1490         switch (nr) {
1491         case SETUP_PWM_DEFAULT:
1492                 val = SENSORS_LIMIT(val, 0, 0xff);
1493                 break;
1494         case SETUP_PWM_UPTIME:
1495         case SETUP_PWM_DOWNTIME:
1496                 val = time_to_reg(val);
1497                 if (val == 0)
1498                         return -EINVAL;
1499                 break;
1500         }
1501
1502         mutex_lock(&data->update_lock);
1503         data->setup_pwm[nr] = val;
1504         w83795_write(client, W83795_REG_SETUP_PWM(nr), val);
1505         mutex_unlock(&data->update_lock);
1506         return count;
1507 }
1508
1509
1510 #define NOT_USED                        -1
1511
1512 /* Don't change the attribute order, _max and _min are accessed by index
1513  * somewhere else in the code */
1514 #define SENSOR_ATTR_IN(index) {                                         \
1515         SENSOR_ATTR_2(in##index##_input, S_IRUGO, show_in, NULL,        \
1516                 IN_READ, index), \
1517         SENSOR_ATTR_2(in##index##_max, S_IRUGO | S_IWUSR, show_in,      \
1518                 store_in, IN_MAX, index),                               \
1519         SENSOR_ATTR_2(in##index##_min, S_IRUGO | S_IWUSR, show_in,      \
1520                 store_in, IN_LOW, index),                               \
1521         SENSOR_ATTR_2(in##index##_alarm, S_IRUGO, show_alarm_beep,      \
1522                 NULL, ALARM_STATUS, index + ((index > 14) ? 1 : 0)), \
1523         SENSOR_ATTR_2(in##index##_beep, S_IWUSR | S_IRUGO,              \
1524                 show_alarm_beep, store_beep, BEEP_ENABLE,               \
1525                 index + ((index > 14) ? 1 : 0)) }
1526
1527 #define SENSOR_ATTR_FAN(index) {                                        \
1528         SENSOR_ATTR_2(fan##index##_input, S_IRUGO, show_fan,            \
1529                 NULL, FAN_INPUT, index - 1), \
1530         SENSOR_ATTR_2(fan##index##_min, S_IWUSR | S_IRUGO,              \
1531                 show_fan, store_fan_min, FAN_MIN, index - 1),   \
1532         SENSOR_ATTR_2(fan##index##_alarm, S_IRUGO, show_alarm_beep,     \
1533                 NULL, ALARM_STATUS, index + 31),                        \
1534         SENSOR_ATTR_2(fan##index##_beep, S_IWUSR | S_IRUGO,             \
1535                 show_alarm_beep, store_beep, BEEP_ENABLE, index + 31) }
1536
1537 #define SENSOR_ATTR_PWM(index) {                                        \
1538         SENSOR_ATTR_2(pwm##index, S_IWUSR | S_IRUGO, show_pwm,          \
1539                 store_pwm, PWM_OUTPUT, index - 1),                      \
1540         SENSOR_ATTR_2(pwm##index##_nonstop, S_IWUSR | S_IRUGO,          \
1541                 show_pwm, store_pwm, PWM_NONSTOP, index - 1),           \
1542         SENSOR_ATTR_2(pwm##index##_start, S_IWUSR | S_IRUGO,            \
1543                 show_pwm, store_pwm, PWM_START, index - 1),             \
1544         SENSOR_ATTR_2(pwm##index##_stop_time, S_IWUSR | S_IRUGO,        \
1545                 show_pwm, store_pwm, PWM_STOP_TIME, index - 1),  \
1546         SENSOR_ATTR_2(pwm##index##_freq, S_IWUSR | S_IRUGO,     \
1547                 show_pwm, store_pwm, PWM_FREQ, index - 1),       \
1548         SENSOR_ATTR_2(pwm##index##_enable, S_IWUSR | S_IRUGO,           \
1549                 show_pwm_enable, store_pwm_enable, NOT_USED, index - 1), \
1550         SENSOR_ATTR_2(fan##index##_target, S_IWUSR | S_IRUGO, \
1551                 show_fanin, store_fanin, FANIN_TARGET, index - 1) }
1552
1553 #define SENSOR_ATTR_DTS(index) {                                        \
1554         SENSOR_ATTR_2(temp##index##_type, S_IRUGO ,             \
1555                 show_dts_mode, NULL, NOT_USED, index - 7),      \
1556         SENSOR_ATTR_2(temp##index##_input, S_IRUGO, show_dts,           \
1557                 NULL, NOT_USED, index - 7),                             \
1558         SENSOR_ATTR_2(temp##index##_crit, S_IRUGO | S_IWUSR, show_dts_ext, \
1559                 store_dts_ext, DTS_CRIT, NOT_USED),                     \
1560         SENSOR_ATTR_2(temp##index##_crit_hyst, S_IRUGO | S_IWUSR,       \
1561                 show_dts_ext, store_dts_ext, DTS_CRIT_HYST, NOT_USED),  \
1562         SENSOR_ATTR_2(temp##index##_max, S_IRUGO | S_IWUSR, show_dts_ext, \
1563                 store_dts_ext, DTS_WARN, NOT_USED),                     \
1564         SENSOR_ATTR_2(temp##index##_max_hyst, S_IRUGO | S_IWUSR,        \
1565                 show_dts_ext, store_dts_ext, DTS_WARN_HYST, NOT_USED),  \
1566         SENSOR_ATTR_2(temp##index##_alarm, S_IRUGO,                     \
1567                 show_alarm_beep, NULL, ALARM_STATUS, index + 17),       \
1568         SENSOR_ATTR_2(temp##index##_beep, S_IWUSR | S_IRUGO,            \
1569                 show_alarm_beep, store_beep, BEEP_ENABLE, index + 17) }
1570
1571 #define SENSOR_ATTR_TEMP(index) {                                       \
1572         SENSOR_ATTR_2(temp##index##_type, S_IRUGO | (index < 4 ? S_IWUSR : 0), \
1573                 show_temp_mode, store_temp_mode, NOT_USED, index - 1),  \
1574         SENSOR_ATTR_2(temp##index##_input, S_IRUGO, show_temp,          \
1575                 NULL, TEMP_READ, index - 1),                            \
1576         SENSOR_ATTR_2(temp##index##_crit, S_IRUGO | S_IWUSR, show_temp, \
1577                 store_temp, TEMP_CRIT, index - 1),                      \
1578         SENSOR_ATTR_2(temp##index##_crit_hyst, S_IRUGO | S_IWUSR,       \
1579                 show_temp, store_temp, TEMP_CRIT_HYST, index - 1),      \
1580         SENSOR_ATTR_2(temp##index##_max, S_IRUGO | S_IWUSR, show_temp,  \
1581                 store_temp, TEMP_WARN, index - 1),                      \
1582         SENSOR_ATTR_2(temp##index##_max_hyst, S_IRUGO | S_IWUSR,        \
1583                 show_temp, store_temp, TEMP_WARN_HYST, index - 1),      \
1584         SENSOR_ATTR_2(temp##index##_alarm, S_IRUGO,                     \
1585                 show_alarm_beep, NULL, ALARM_STATUS,                    \
1586                 index + (index > 4 ? 11 : 17)),                         \
1587         SENSOR_ATTR_2(temp##index##_beep, S_IWUSR | S_IRUGO,            \
1588                 show_alarm_beep, store_beep, BEEP_ENABLE,               \
1589                 index + (index > 4 ? 11 : 17)),                         \
1590         SENSOR_ATTR_2(temp##index##_source_sel, S_IWUSR | S_IRUGO,      \
1591                 show_temp_src, store_temp_src, NOT_USED, index - 1),    \
1592         SENSOR_ATTR_2(temp##index##_pwm_enable, S_IWUSR | S_IRUGO,      \
1593                 show_temp_pwm_enable, store_temp_pwm_enable,            \
1594                 TEMP_PWM_ENABLE, index - 1),                            \
1595         SENSOR_ATTR_2(temp##index##_auto_channels_pwm, S_IWUSR | S_IRUGO, \
1596                 show_temp_pwm_enable, store_temp_pwm_enable,            \
1597                 TEMP_PWM_FAN_MAP, index - 1),                           \
1598         SENSOR_ATTR_2(thermal_cruise##index, S_IWUSR | S_IRUGO,         \
1599                 show_temp_pwm, store_temp_pwm, TEMP_PWM_TTTI, index - 1), \
1600         SENSOR_ATTR_2(temp##index##_warn, S_IWUSR | S_IRUGO,            \
1601                 show_temp_pwm, store_temp_pwm, TEMP_PWM_CTFS, index - 1), \
1602         SENSOR_ATTR_2(temp##index##_warn_hyst, S_IWUSR | S_IRUGO,       \
1603                 show_temp_pwm, store_temp_pwm, TEMP_PWM_HCT, index - 1), \
1604         SENSOR_ATTR_2(temp##index##_operation_hyst, S_IWUSR | S_IRUGO,  \
1605                 show_temp_pwm, store_temp_pwm, TEMP_PWM_HOT, index - 1), \
1606         SENSOR_ATTR_2(temp##index##_auto_point1_pwm, S_IRUGO | S_IWUSR, \
1607                 show_sf4_pwm, store_sf4_pwm, 0, index - 1),             \
1608         SENSOR_ATTR_2(temp##index##_auto_point2_pwm, S_IRUGO | S_IWUSR, \
1609                 show_sf4_pwm, store_sf4_pwm, 1, index - 1),             \
1610         SENSOR_ATTR_2(temp##index##_auto_point3_pwm, S_IRUGO | S_IWUSR, \
1611                 show_sf4_pwm, store_sf4_pwm, 2, index - 1),             \
1612         SENSOR_ATTR_2(temp##index##_auto_point4_pwm, S_IRUGO | S_IWUSR, \
1613                 show_sf4_pwm, store_sf4_pwm, 3, index - 1),             \
1614         SENSOR_ATTR_2(temp##index##_auto_point5_pwm, S_IRUGO | S_IWUSR, \
1615                 show_sf4_pwm, store_sf4_pwm, 4, index - 1),             \
1616         SENSOR_ATTR_2(temp##index##_auto_point6_pwm, S_IRUGO | S_IWUSR, \
1617                 show_sf4_pwm, store_sf4_pwm, 5, index - 1),             \
1618         SENSOR_ATTR_2(temp##index##_auto_point7_pwm, S_IRUGO | S_IWUSR, \
1619                 show_sf4_pwm, store_sf4_pwm, 6, index - 1),             \
1620         SENSOR_ATTR_2(temp##index##_auto_point1_temp, S_IRUGO | S_IWUSR,\
1621                 show_sf4_temp, store_sf4_temp, 0, index - 1),           \
1622         SENSOR_ATTR_2(temp##index##_auto_point2_temp, S_IRUGO | S_IWUSR,\
1623                 show_sf4_temp, store_sf4_temp, 1, index - 1),           \
1624         SENSOR_ATTR_2(temp##index##_auto_point3_temp, S_IRUGO | S_IWUSR,\
1625                 show_sf4_temp, store_sf4_temp, 2, index - 1),           \
1626         SENSOR_ATTR_2(temp##index##_auto_point4_temp, S_IRUGO | S_IWUSR,\
1627                 show_sf4_temp, store_sf4_temp, 3, index - 1),           \
1628         SENSOR_ATTR_2(temp##index##_auto_point5_temp, S_IRUGO | S_IWUSR,\
1629                 show_sf4_temp, store_sf4_temp, 4, index - 1),           \
1630         SENSOR_ATTR_2(temp##index##_auto_point6_temp, S_IRUGO | S_IWUSR,\
1631                 show_sf4_temp, store_sf4_temp, 5, index - 1),           \
1632         SENSOR_ATTR_2(temp##index##_auto_point7_temp, S_IRUGO | S_IWUSR,\
1633                 show_sf4_temp, store_sf4_temp, 6, index - 1) }
1634
1635
1636 static struct sensor_device_attribute_2 w83795_in[][5] = {
1637         SENSOR_ATTR_IN(0),
1638         SENSOR_ATTR_IN(1),
1639         SENSOR_ATTR_IN(2),
1640         SENSOR_ATTR_IN(3),
1641         SENSOR_ATTR_IN(4),
1642         SENSOR_ATTR_IN(5),
1643         SENSOR_ATTR_IN(6),
1644         SENSOR_ATTR_IN(7),
1645         SENSOR_ATTR_IN(8),
1646         SENSOR_ATTR_IN(9),
1647         SENSOR_ATTR_IN(10),
1648         SENSOR_ATTR_IN(11),
1649         SENSOR_ATTR_IN(12),
1650         SENSOR_ATTR_IN(13),
1651         SENSOR_ATTR_IN(14),
1652         SENSOR_ATTR_IN(15),
1653         SENSOR_ATTR_IN(16),
1654         SENSOR_ATTR_IN(17),
1655         SENSOR_ATTR_IN(18),
1656         SENSOR_ATTR_IN(19),
1657         SENSOR_ATTR_IN(20),
1658 };
1659
1660 static const struct sensor_device_attribute_2 w83795_fan[][4] = {
1661         SENSOR_ATTR_FAN(1),
1662         SENSOR_ATTR_FAN(2),
1663         SENSOR_ATTR_FAN(3),
1664         SENSOR_ATTR_FAN(4),
1665         SENSOR_ATTR_FAN(5),
1666         SENSOR_ATTR_FAN(6),
1667         SENSOR_ATTR_FAN(7),
1668         SENSOR_ATTR_FAN(8),
1669         SENSOR_ATTR_FAN(9),
1670         SENSOR_ATTR_FAN(10),
1671         SENSOR_ATTR_FAN(11),
1672         SENSOR_ATTR_FAN(12),
1673         SENSOR_ATTR_FAN(13),
1674         SENSOR_ATTR_FAN(14),
1675 };
1676
1677 static const struct sensor_device_attribute_2 w83795_temp[][29] = {
1678         SENSOR_ATTR_TEMP(1),
1679         SENSOR_ATTR_TEMP(2),
1680         SENSOR_ATTR_TEMP(3),
1681         SENSOR_ATTR_TEMP(4),
1682         SENSOR_ATTR_TEMP(5),
1683         SENSOR_ATTR_TEMP(6),
1684 };
1685
1686 static const struct sensor_device_attribute_2 w83795_dts[][8] = {
1687         SENSOR_ATTR_DTS(7),
1688         SENSOR_ATTR_DTS(8),
1689         SENSOR_ATTR_DTS(9),
1690         SENSOR_ATTR_DTS(10),
1691         SENSOR_ATTR_DTS(11),
1692         SENSOR_ATTR_DTS(12),
1693         SENSOR_ATTR_DTS(13),
1694         SENSOR_ATTR_DTS(14),
1695 };
1696
1697 static const struct sensor_device_attribute_2 w83795_pwm[][7] = {
1698         SENSOR_ATTR_PWM(1),
1699         SENSOR_ATTR_PWM(2),
1700         SENSOR_ATTR_PWM(3),
1701         SENSOR_ATTR_PWM(4),
1702         SENSOR_ATTR_PWM(5),
1703         SENSOR_ATTR_PWM(6),
1704         SENSOR_ATTR_PWM(7),
1705         SENSOR_ATTR_PWM(8),
1706 };
1707
1708 static const struct sensor_device_attribute_2 sda_single_files[] = {
1709         SENSOR_ATTR_2(chassis, S_IWUSR | S_IRUGO, show_alarm_beep,
1710                       store_chassis_clear, ALARM_STATUS, 46),
1711         SENSOR_ATTR_2(beep_enable, S_IWUSR | S_IRUGO, show_alarm_beep,
1712                       store_beep, BEEP_ENABLE, 47),
1713         SENSOR_ATTR_2(speed_cruise_tolerance, S_IWUSR | S_IRUGO, show_fanin,
1714                 store_fanin, FANIN_TOL, NOT_USED),
1715         SENSOR_ATTR_2(pwm_default, S_IWUSR | S_IRUGO, show_sf_setup,
1716                       store_sf_setup, SETUP_PWM_DEFAULT, NOT_USED),
1717         SENSOR_ATTR_2(pwm_uptime, S_IWUSR | S_IRUGO, show_sf_setup,
1718                       store_sf_setup, SETUP_PWM_UPTIME, NOT_USED),
1719         SENSOR_ATTR_2(pwm_downtime, S_IWUSR | S_IRUGO, show_sf_setup,
1720                       store_sf_setup, SETUP_PWM_DOWNTIME, NOT_USED),
1721 };
1722
1723 /*
1724  * Driver interface
1725  */
1726
1727 static void w83795_init_client(struct i2c_client *client)
1728 {
1729         struct w83795_data *data = i2c_get_clientdata(client);
1730         static const u16 clkin[4] = {   /* in kHz */
1731                 14318, 24000, 33333, 48000
1732         };
1733         u8 config;
1734
1735         if (reset)
1736                 w83795_write(client, W83795_REG_CONFIG, 0x80);
1737
1738         /* Start monitoring if needed */
1739         config = w83795_read(client, W83795_REG_CONFIG);
1740         if (!(config & W83795_REG_CONFIG_START)) {
1741                 dev_info(&client->dev, "Enabling monitoring operations\n");
1742                 w83795_write(client, W83795_REG_CONFIG,
1743                              config | W83795_REG_CONFIG_START);
1744         }
1745
1746         data->clkin = clkin[(config >> 3) & 0x3];
1747         dev_dbg(&client->dev, "clkin = %u kHz\n", data->clkin);
1748 }
1749
1750 static int w83795_get_device_id(struct i2c_client *client)
1751 {
1752         int device_id;
1753
1754         device_id = i2c_smbus_read_byte_data(client, W83795_REG_DEVICEID);
1755
1756         /* Special case for rev. A chips; can't be checked first because later
1757            revisions emulate this for compatibility */
1758         if (device_id < 0 || (device_id & 0xf0) != 0x50) {
1759                 int alt_id;
1760
1761                 alt_id = i2c_smbus_read_byte_data(client,
1762                                                   W83795_REG_DEVICEID_A);
1763                 if (alt_id == 0x50)
1764                         device_id = alt_id;
1765         }
1766
1767         return device_id;
1768 }
1769
1770 /* Return 0 if detection is successful, -ENODEV otherwise */
1771 static int w83795_detect(struct i2c_client *client,
1772                          struct i2c_board_info *info)
1773 {
1774         int bank, vendor_id, device_id, expected, i2c_addr, config;
1775         struct i2c_adapter *adapter = client->adapter;
1776         unsigned short address = client->addr;
1777         const char *chip_name;
1778
1779         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1780                 return -ENODEV;
1781         bank = i2c_smbus_read_byte_data(client, W83795_REG_BANKSEL);
1782         if (bank < 0 || (bank & 0x7c)) {
1783                 dev_dbg(&adapter->dev,
1784                         "w83795: Detection failed at addr 0x%02hx, check %s\n",
1785                         address, "bank");
1786                 return -ENODEV;
1787         }
1788
1789         /* Check Nuvoton vendor ID */
1790         vendor_id = i2c_smbus_read_byte_data(client, W83795_REG_VENDORID);
1791         expected = bank & 0x80 ? 0x5c : 0xa3;
1792         if (vendor_id != expected) {
1793                 dev_dbg(&adapter->dev,
1794                         "w83795: Detection failed at addr 0x%02hx, check %s\n",
1795                         address, "vendor id");
1796                 return -ENODEV;
1797         }
1798
1799         /* Check device ID */
1800         device_id = w83795_get_device_id(client) |
1801                     (i2c_smbus_read_byte_data(client, W83795_REG_CHIPID) << 8);
1802         if ((device_id >> 4) != 0x795) {
1803                 dev_dbg(&adapter->dev,
1804                         "w83795: Detection failed at addr 0x%02hx, check %s\n",
1805                         address, "device id\n");
1806                 return -ENODEV;
1807         }
1808
1809         /* If Nuvoton chip, address of chip and W83795_REG_I2C_ADDR
1810            should match */
1811         if ((bank & 0x07) == 0) {
1812                 i2c_addr = i2c_smbus_read_byte_data(client,
1813                                                     W83795_REG_I2C_ADDR);
1814                 if ((i2c_addr & 0x7f) != address) {
1815                         dev_dbg(&adapter->dev,
1816                                 "w83795: Detection failed at addr 0x%02hx, "
1817                                 "check %s\n", address, "i2c addr");
1818                         return -ENODEV;
1819                 }
1820         }
1821
1822         /* Check 795 chip type: 795G or 795ADG
1823            Usually we don't write to chips during detection, but here we don't
1824            quite have the choice; hopefully it's OK, we are about to return
1825            success anyway */
1826         if ((bank & 0x07) != 0)
1827                 i2c_smbus_write_byte_data(client, W83795_REG_BANKSEL,
1828                                           bank & ~0x07);
1829         config = i2c_smbus_read_byte_data(client, W83795_REG_CONFIG);
1830         if (config & W83795_REG_CONFIG_CONFIG48)
1831                 chip_name = "w83795adg";
1832         else
1833                 chip_name = "w83795g";
1834
1835         strlcpy(info->type, chip_name, I2C_NAME_SIZE);
1836         dev_info(&adapter->dev, "Found %s rev. %c at 0x%02hx\n", chip_name,
1837                  'A' + (device_id & 0xf), address);
1838
1839         return 0;
1840 }
1841
1842 static int w83795_handle_files(struct device *dev, int (*fn)(struct device *,
1843                                const struct device_attribute *))
1844 {
1845         struct w83795_data *data = dev_get_drvdata(dev);
1846         int err, i, j;
1847
1848         for (i = 0; i < ARRAY_SIZE(w83795_in); i++) {
1849                 if (!(data->has_in & (1 << i)))
1850                         continue;
1851                 for (j = 0; j < ARRAY_SIZE(w83795_in[0]); j++) {
1852                         err = fn(dev, &w83795_in[i][j].dev_attr);
1853                         if (err)
1854                                 return err;
1855                 }
1856         }
1857
1858         for (i = 0; i < ARRAY_SIZE(w83795_fan); i++) {
1859                 if (!(data->has_fan & (1 << i)))
1860                         continue;
1861                 for (j = 0; j < ARRAY_SIZE(w83795_fan[0]); j++) {
1862                         err = fn(dev, &w83795_fan[i][j].dev_attr);
1863                         if (err)
1864                                 return err;
1865                 }
1866         }
1867
1868         for (i = 0; i < ARRAY_SIZE(sda_single_files); i++) {
1869                 err = fn(dev, &sda_single_files[i].dev_attr);
1870                 if (err)
1871                         return err;
1872         }
1873
1874         for (i = 0; i < data->has_pwm; i++) {
1875                 for (j = 0; j < ARRAY_SIZE(w83795_pwm[0]); j++) {
1876                         err = fn(dev, &w83795_pwm[i][j].dev_attr);
1877                         if (err)
1878                                 return err;
1879                 }
1880         }
1881
1882         for (i = 0; i < ARRAY_SIZE(w83795_temp); i++) {
1883                 if (!(data->has_temp & (1 << i)))
1884                         continue;
1885                 for (j = 0; j < ARRAY_SIZE(w83795_temp[0]); j++) {
1886                         err = fn(dev, &w83795_temp[i][j].dev_attr);
1887                         if (err)
1888                                 return err;
1889                 }
1890         }
1891
1892         if (data->enable_dts) {
1893                 for (i = 0; i < ARRAY_SIZE(w83795_dts); i++) {
1894                         if (!(data->has_dts & (1 << i)))
1895                                 continue;
1896                         for (j = 0; j < ARRAY_SIZE(w83795_dts[0]); j++) {
1897                                 err = fn(dev, &w83795_dts[i][j].dev_attr);
1898                                 if (err)
1899                                         return err;
1900                         }
1901                 }
1902         }
1903
1904         return 0;
1905 }
1906
1907 /* We need a wrapper that fits in w83795_handle_files */
1908 static int device_remove_file_wrapper(struct device *dev,
1909                                       const struct device_attribute *attr)
1910 {
1911         device_remove_file(dev, attr);
1912         return 0;
1913 }
1914
1915 static void w83795_check_dynamic_in_limits(struct i2c_client *client)
1916 {
1917         struct w83795_data *data = i2c_get_clientdata(client);
1918         u8 vid_ctl;
1919         int i, err_max, err_min;
1920
1921         vid_ctl = w83795_read(client, W83795_REG_VID_CTRL);
1922
1923         /* Return immediately if VRM isn't configured */
1924         if ((vid_ctl & 0x07) == 0x00 || (vid_ctl & 0x07) == 0x07)
1925                 return;
1926
1927         data->has_dyn_in = (vid_ctl >> 3) & 0x07;
1928         for (i = 0; i < 2; i++) {
1929                 if (!(data->has_dyn_in & (1 << i)))
1930                         continue;
1931
1932                 /* Voltage limits in dynamic mode, switch to read-only */
1933                 err_max = sysfs_chmod_file(&client->dev.kobj,
1934                                            &w83795_in[i][2].dev_attr.attr,
1935                                            S_IRUGO);
1936                 err_min = sysfs_chmod_file(&client->dev.kobj,
1937                                            &w83795_in[i][3].dev_attr.attr,
1938                                            S_IRUGO);
1939                 if (err_max || err_min)
1940                         dev_warn(&client->dev, "Failed to set in%d limits "
1941                                  "read-only (%d, %d)\n", i, err_max, err_min);
1942                 else
1943                         dev_info(&client->dev, "in%d limits set dynamically "
1944                                  "from VID\n", i);
1945         }
1946 }
1947
1948 /* Check pins that can be used for either temperature or voltage monitoring */
1949 static void w83795_apply_temp_config(struct w83795_data *data, u8 config,
1950                                      int temp_chan, int in_chan)
1951 {
1952         /* config is a 2-bit value */
1953         switch (config) {
1954         case 0x2: /* Voltage monitoring */
1955                 data->has_in |= 1 << in_chan;
1956                 break;
1957         case 0x1: /* Thermal diode */
1958                 if (temp_chan >= 4)
1959                         break;
1960                 data->temp_mode |= 1 << temp_chan;
1961                 /* fall through */
1962         case 0x3: /* Thermistor */
1963                 data->has_temp |= 1 << temp_chan;
1964                 break;
1965         }
1966 }
1967
1968 static int w83795_probe(struct i2c_client *client,
1969                         const struct i2c_device_id *id)
1970 {
1971         int i;
1972         u8 tmp;
1973         struct device *dev = &client->dev;
1974         struct w83795_data *data;
1975         int err;
1976
1977         data = kzalloc(sizeof(struct w83795_data), GFP_KERNEL);
1978         if (!data) {
1979                 err = -ENOMEM;
1980                 goto exit;
1981         }
1982
1983         i2c_set_clientdata(client, data);
1984         data->chip_type = id->driver_data;
1985         data->bank = i2c_smbus_read_byte_data(client, W83795_REG_BANKSEL);
1986         mutex_init(&data->update_lock);
1987
1988         /* Initialize the chip */
1989         w83795_init_client(client);
1990
1991         /* Check which voltages and fans are present */
1992         data->has_in = w83795_read(client, W83795_REG_VOLT_CTRL1)
1993                      | (w83795_read(client, W83795_REG_VOLT_CTRL2) << 8);
1994         data->has_fan = w83795_read(client, W83795_REG_FANIN_CTRL1)
1995                       | (w83795_read(client, W83795_REG_FANIN_CTRL2) << 8);
1996
1997         /* Check which analog temperatures and extra voltages are present */
1998         tmp = w83795_read(client, W83795_REG_TEMP_CTRL1);
1999         if (tmp & 0x20)
2000                 data->enable_dts = 1;
2001         w83795_apply_temp_config(data, (tmp >> 2) & 0x3, 5, 16);
2002         w83795_apply_temp_config(data, tmp & 0x3, 4, 15);
2003         tmp = w83795_read(client, W83795_REG_TEMP_CTRL2);
2004         w83795_apply_temp_config(data, tmp >> 6, 3, 20);
2005         w83795_apply_temp_config(data, (tmp >> 4) & 0x3, 2, 19);
2006         w83795_apply_temp_config(data, (tmp >> 2) & 0x3, 1, 18);
2007         w83795_apply_temp_config(data, tmp & 0x3, 0, 17);
2008
2009         /* Check DTS enable status */
2010         if (data->enable_dts) {
2011                 if (1 & w83795_read(client, W83795_REG_DTSC))
2012                         data->enable_dts |= 2;
2013                 data->has_dts = w83795_read(client, W83795_REG_DTSE);
2014         }
2015
2016         /* Report PECI Tbase values */
2017         if (data->enable_dts == 1) {
2018                 for (i = 0; i < 8; i++) {
2019                         if (!(data->has_dts & (1 << i)))
2020                                 continue;
2021                         tmp = w83795_read(client, W83795_REG_PECI_TBASE(i));
2022                         dev_info(&client->dev,
2023                                  "PECI agent %d Tbase temperature: %u\n",
2024                                  i + 1, (unsigned int)tmp & 0x7f);
2025                 }
2026         }
2027
2028         data->has_gain = w83795_read(client, W83795_REG_VMIGB_CTRL) & 0x0f;
2029
2030         /* pwm and smart fan */
2031         if (data->chip_type == w83795g)
2032                 data->has_pwm = 8;
2033         else
2034                 data->has_pwm = 2;
2035
2036         err = w83795_handle_files(dev, device_create_file);
2037         if (err)
2038                 goto exit_remove;
2039
2040         if (data->chip_type == w83795g)
2041                 w83795_check_dynamic_in_limits(client);
2042
2043         data->hwmon_dev = hwmon_device_register(dev);
2044         if (IS_ERR(data->hwmon_dev)) {
2045                 err = PTR_ERR(data->hwmon_dev);
2046                 goto exit_remove;
2047         }
2048
2049         return 0;
2050
2051 exit_remove:
2052         w83795_handle_files(dev, device_remove_file_wrapper);
2053         kfree(data);
2054 exit:
2055         return err;
2056 }
2057
2058 static int w83795_remove(struct i2c_client *client)
2059 {
2060         struct w83795_data *data = i2c_get_clientdata(client);
2061
2062         hwmon_device_unregister(data->hwmon_dev);
2063         w83795_handle_files(&client->dev, device_remove_file_wrapper);
2064         kfree(data);
2065
2066         return 0;
2067 }
2068
2069
2070 static const struct i2c_device_id w83795_id[] = {
2071         { "w83795g", w83795g },
2072         { "w83795adg", w83795adg },
2073         { }
2074 };
2075 MODULE_DEVICE_TABLE(i2c, w83795_id);
2076
2077 static struct i2c_driver w83795_driver = {
2078         .driver = {
2079                    .name = "w83795",
2080         },
2081         .probe          = w83795_probe,
2082         .remove         = w83795_remove,
2083         .id_table       = w83795_id,
2084
2085         .class          = I2C_CLASS_HWMON,
2086         .detect         = w83795_detect,
2087         .address_list   = normal_i2c,
2088 };
2089
2090 static int __init sensors_w83795_init(void)
2091 {
2092         return i2c_add_driver(&w83795_driver);
2093 }
2094
2095 static void __exit sensors_w83795_exit(void)
2096 {
2097         i2c_del_driver(&w83795_driver);
2098 }
2099
2100 MODULE_AUTHOR("Wei Song");
2101 MODULE_DESCRIPTION("W83795G/ADG hardware monitoring driver");
2102 MODULE_LICENSE("GPL");
2103
2104 module_init(sensors_w83795_init);
2105 module_exit(sensors_w83795_exit);