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 != 0) {
 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) & 0x0f;
 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] |=
 622                   (w83795_read(client, W83795_REG_VRLSB) >> 4) & 0x0F;
 623         }
 624
 625         /* Update temperature */
 626         for (i = 0; i < ARRAY_SIZE(data->temp); i++) {
 627                 data->temp[i][TEMP_READ] =
 628                         w83795_read(client, W83795_REG_TEMP[i][TEMP_READ]);
 629                 data->temp_read_vrlsb[i] =
 630                         w83795_read(client, W83795_REG_VRLSB);
 631         }
 632
 633         /* Update dts temperature */
 634         if (data->enable_dts != 0) {
 635                 for (i = 0; i < ARRAY_SIZE(data->dts); i++) {
 636                         if (!(data->has_dts & (1 << i)))
 637                                 continue;
 638                         data->dts[i] =
 639                                 w83795_read(client, W83795_REG_DTS(i));
 640                         data->dts_read_vrlsb[i] =
 641                                 w83795_read(client, W83795_REG_VRLSB);
 642                 }
 643         }
 644
 645         /* Update pwm output */
 646         for (i = 0; i < data->has_pwm; i++) {
 647                 data->pwm[i][PWM_OUTPUT] =
 648                     w83795_read(client, W83795_REG_PWM(i, PWM_OUTPUT));
 649         }
 650
 651         /* update alarm */
 652         for (i = 0; i < ARRAY_SIZE(data->alarms); i++)
 653                 data->alarms[i] = w83795_read(client, W83795_REG_ALARM(i));
 654
 655         data->last_updated = jiffies;
 656         data->valid = 1;
 657
 658 END:
 659         mutex_unlock(&data->update_lock);
 660         return data;
 661 }
 662
 663 /*
 664  * Sysfs attributes
 665  */
 666
 667 #define ALARM_STATUS      0
 668 #define BEEP_ENABLE       1
 669 static ssize_t
 670 show_alarm_beep(struct device *dev, struct device_attribute *attr, char *buf)
 671 {
 672         struct w83795_data *data = w83795_update_device(dev);
 673         struct sensor_device_attribute_2 *sensor_attr =
 674             to_sensor_dev_attr_2(attr);
 675         int nr = sensor_attr->nr;
 676         int index = sensor_attr->index >> 3;
 677         int bit = sensor_attr->index & 0x07;
 678         u8 val;
 679
 680         if (ALARM_STATUS == nr) {
 681                 val = (data->alarms[index] >> (bit)) & 1;
 682         } else {                /* BEEP_ENABLE */
 683                 val = (data->beeps[index] >> (bit)) & 1;
 684         }
 685
 686         return sprintf(buf, "%u\n", val);
 687 }
 688
 689 static ssize_t
 690 store_beep(struct device *dev, struct device_attribute *attr,
 691            const char *buf, size_t count)
 692 {
 693         struct i2c_client *client = to_i2c_client(dev);
 694         struct w83795_data *data = i2c_get_clientdata(client);
 695         struct sensor_device_attribute_2 *sensor_attr =
 696             to_sensor_dev_attr_2(attr);
 697         int index = sensor_attr->index >> 3;
 698         int shift = sensor_attr->index & 0x07;
 699         u8 beep_bit = 1 << shift;
 700         unsigned long val;
 701
 702         if (strict_strtoul(buf, 10, &val) < 0)
 703                 return -EINVAL;
 704         if (val != 0 && val != 1)
 705                 return -EINVAL;
 706
 707         mutex_lock(&data->update_lock);
 708         data->beeps[index] = w83795_read(client, W83795_REG_BEEP(index));
 709         data->beeps[index] &= ~beep_bit;
 710         data->beeps[index] |= val << shift;
 711         w83795_write(client, W83795_REG_BEEP(index), data->beeps[index]);
 712         mutex_unlock(&data->update_lock);
 713
 714         return count;
 715 }
 716
 717 /* Write any value to clear chassis alarm */
 718 static ssize_t
 719 store_chassis_clear(struct device *dev,
 720                     struct device_attribute *attr, const char *buf,
 721                     size_t count)
 722 {
 723         struct i2c_client *client = to_i2c_client(dev);
 724         struct w83795_data *data = i2c_get_clientdata(client);
 725         u8 val;
 726
 727         mutex_lock(&data->update_lock);
 728         val = w83795_read(client, W83795_REG_CLR_CHASSIS);
 729         val |= 0x80;
 730         w83795_write(client, W83795_REG_CLR_CHASSIS, val);
 731         mutex_unlock(&data->update_lock);
 732         return count;
 733 }
 734
 735 #define FAN_INPUT     0
 736 #define FAN_MIN       1
 737 static ssize_t
 738 show_fan(struct device *dev, struct device_attribute *attr, char *buf)
 739 {
 740         struct sensor_device_attribute_2 *sensor_attr =
 741             to_sensor_dev_attr_2(attr);
 742         int nr = sensor_attr->nr;
 743         int index = sensor_attr->index;
 744         struct w83795_data *data = w83795_update_device(dev);
 745         u16 val;
 746
 747         if (FAN_INPUT == nr)
 748                 val = data->fan[index] & 0x0fff;
 749         else
 750                 val = data->fan_min[index] & 0x0fff;
 751
 752         return sprintf(buf, "%lu\n", fan_from_reg(val));
 753 }
 754
 755 static ssize_t
 756 store_fan_min(struct device *dev, struct device_attribute *attr,
 757               const char *buf, size_t count)
 758 {
 759         struct sensor_device_attribute_2 *sensor_attr =
 760             to_sensor_dev_attr_2(attr);
 761         int index = sensor_attr->index;
 762         struct i2c_client *client = to_i2c_client(dev);
 763         struct w83795_data *data = i2c_get_clientdata(client);
 764         unsigned long val;
 765
 766         if (strict_strtoul(buf, 10, &val))
 767                 return -EINVAL;
 768         val = fan_to_reg(val);
 769
 770         mutex_lock(&data->update_lock);
 771         data->fan_min[index] = val;
 772         w83795_write(client, W83795_REG_FAN_MIN_HL(index), (val >> 4) & 0xff);
 773         val &= 0x0f;
 774         if (index & 1) {
 775                 val <<= 4;
 776                 val |= w83795_read(client, W83795_REG_FAN_MIN_LSB(index))
 777                        & 0x0f;
 778         } else {
 779                 val |= w83795_read(client, W83795_REG_FAN_MIN_LSB(index))
 780                        & 0xf0;
 781         }
 782         w83795_write(client, W83795_REG_FAN_MIN_LSB(index), val & 0xff);
 783         mutex_unlock(&data->update_lock);
 784
 785         return count;
 786 }
 787
 788 static ssize_t
 789 show_pwm(struct device *dev, struct device_attribute *attr, char *buf)
 790 {
 791         struct w83795_data *data;
 792         struct sensor_device_attribute_2 *sensor_attr =
 793             to_sensor_dev_attr_2(attr);
 794         int nr = sensor_attr->nr;
 795         int index = sensor_attr->index;
 796         unsigned int val;
 797
 798         data = nr == PWM_OUTPUT ? w83795_update_device(dev)
 799                                 : w83795_update_pwm_config(dev);
 800
 801         switch (nr) {
 802         case PWM_STOP_TIME:
 803                 val = time_from_reg(data->pwm[index][nr]);
 804                 break;
 805         case PWM_FREQ:
 806                 val = pwm_freq_from_reg(data->pwm[index][nr], data->clkin);
 807                 break;
 808         default:
 809                 val = data->pwm[index][nr];
 810                 break;
 811         }
 812
 813         return sprintf(buf, "%u\n", val);
 814 }
 815
 816 static ssize_t
 817 store_pwm(struct device *dev, struct device_attribute *attr,
 818           const char *buf, size_t count)
 819 {
 820         struct i2c_client *client = to_i2c_client(dev);
 821         struct w83795_data *data = i2c_get_clientdata(client);
 822         struct sensor_device_attribute_2 *sensor_attr =
 823             to_sensor_dev_attr_2(attr);
 824         int nr = sensor_attr->nr;
 825         int index = sensor_attr->index;
 826         unsigned long val;
 827
 828         if (strict_strtoul(buf, 10, &val) < 0)
 829                 return -EINVAL;
 830
 831         mutex_lock(&data->update_lock);
 832         switch (nr) {
 833         case PWM_STOP_TIME:
 834                 val = time_to_reg(val);
 835                 break;
 836         case PWM_FREQ:
 837                 val = pwm_freq_to_reg(val, data->clkin);
 838                 break;
 839         default:
 840                 val = SENSORS_LIMIT(val, 0, 0xff);
 841                 break;
 842         }
 843         w83795_write(client, W83795_REG_PWM(index, nr), val);
 844         data->pwm[index][nr] = val;
 845         mutex_unlock(&data->update_lock);
 846         return count;
 847 }
 848
 849 static ssize_t
 850 show_pwm_enable(struct device *dev, struct device_attribute *attr, char *buf)
 851 {
 852         struct sensor_device_attribute_2 *sensor_attr =
 853             to_sensor_dev_attr_2(attr);
 854         struct w83795_data *data = w83795_update_pwm_config(dev);
 855         int index = sensor_attr->index;
 856         u8 tmp;
 857
 858         if (1 == (data->pwm_fcms[0] & (1 << index))) {
 859                 tmp = 2;
 860                 goto out;
 861         }
 862         for (tmp = 0; tmp < 6; tmp++) {
 863                 if (data->pwm_tfmr[tmp] & (1 << index)) {
 864                         tmp = 3;
 865                         goto out;
 866                 }
 867         }
 868         if (data->pwm_fomc & (1 << index))
 869                 tmp = 0;
 870         else
 871                 tmp = 1;
 872
 873 out:
 874         return sprintf(buf, "%u\n", tmp);
 875 }
 876
 877 static ssize_t
 878 store_pwm_enable(struct device *dev, struct device_attribute *attr,
 879           const char *buf, size_t count)
 880 {
 881         struct i2c_client *client = to_i2c_client(dev);
 882         struct w83795_data *data = w83795_update_pwm_config(dev);
 883         struct sensor_device_attribute_2 *sensor_attr =
 884             to_sensor_dev_attr_2(attr);
 885         int index = sensor_attr->index;
 886         unsigned long val;
 887         int i;
 888
 889         if (strict_strtoul(buf, 10, &val) < 0)
 890                 return -EINVAL;
 891         if (val > 2)
 892                 return -EINVAL;
 893
 894         mutex_lock(&data->update_lock);
 895         switch (val) {
 896         case 0:
 897         case 1:
 898                 data->pwm_fcms[0] &= ~(1 << index);
 899                 w83795_write(client, W83795_REG_FCMS1, data->pwm_fcms[0]);
 900                 for (i = 0; i < 6; i++) {
 901                         data->pwm_tfmr[i] &= ~(1 << index);
 902                         w83795_write(client, W83795_REG_TFMR(i),
 903                                 data->pwm_tfmr[i]);
 904                 }
 905                 data->pwm_fomc |= 1 << index;
 906                 data->pwm_fomc ^= val << index;
 907                 w83795_write(client, W83795_REG_FOMC, data->pwm_fomc);
 908                 break;
 909         case 2:
 910                 data->pwm_fcms[0] |= (1 << index);
 911                 w83795_write(client, W83795_REG_FCMS1, data->pwm_fcms[0]);
 912                 break;
 913         }
 914         mutex_unlock(&data->update_lock);
 915         return count;
 916 }
 917
 918 static ssize_t
 919 show_temp_src(struct device *dev, struct device_attribute *attr, char *buf)
 920 {
 921         struct sensor_device_attribute_2 *sensor_attr =
 922             to_sensor_dev_attr_2(attr);
 923         struct w83795_data *data = w83795_update_pwm_config(dev);
 924         int index = sensor_attr->index;
 925         u8 val = index / 2;
 926         u8 tmp = data->temp_src[val];
 927
 928         if (index & 1)
 929                 val = 4;
 930         else
 931                 val = 0;
 932         tmp >>= val;
 933         tmp &= 0x0f;
 934
 935         return sprintf(buf, "%u\n", tmp);
 936 }
 937
 938 static ssize_t
 939 store_temp_src(struct device *dev, struct device_attribute *attr,
 940           const char *buf, size_t count)
 941 {
 942         struct i2c_client *client = to_i2c_client(dev);
 943         struct w83795_data *data = w83795_update_pwm_config(dev);
 944         struct sensor_device_attribute_2 *sensor_attr =
 945             to_sensor_dev_attr_2(attr);
 946         int index = sensor_attr->index;
 947         unsigned long tmp;
 948         u8 val = index / 2;
 949
 950         if (strict_strtoul(buf, 10, &tmp) < 0)
 951                 return -EINVAL;
 952         tmp = SENSORS_LIMIT(tmp, 0, 15);
 953
 954         mutex_lock(&data->update_lock);
 955         if (index & 1) {
 956                 tmp <<= 4;
 957                 data->temp_src[val] &= 0x0f;
 958         } else {
 959                 data->temp_src[val] &= 0xf0;
 960         }
 961         data->temp_src[val] |= tmp;
 962         w83795_write(client, W83795_REG_TSS(val), data->temp_src[val]);
 963         mutex_unlock(&data->update_lock);
 964
 965         return count;
 966 }
 967
 968 #define TEMP_PWM_ENABLE   0
 969 #define TEMP_PWM_FAN_MAP  1
 970 static ssize_t
 971 show_temp_pwm_enable(struct device *dev, struct device_attribute *attr,
 972                      char *buf)
 973 {
 974         struct w83795_data *data = w83795_update_pwm_config(dev);
 975         struct sensor_device_attribute_2 *sensor_attr =
 976             to_sensor_dev_attr_2(attr);
 977         int nr = sensor_attr->nr;
 978         int index = sensor_attr->index;
 979         u8 tmp = 0xff;
 980
 981         switch (nr) {
 982         case TEMP_PWM_ENABLE:
 983                 tmp = (data->pwm_fcms[1] >> index) & 1;
 984                 if (tmp)
 985                         tmp = 4;
 986                 else
 987                         tmp = 3;
 988                 break;
 989         case TEMP_PWM_FAN_MAP:
 990                 tmp = data->pwm_tfmr[index];
 991                 break;
 992         }
 993
 994         return sprintf(buf, "%u\n", tmp);
 995 }
 996
 997 static ssize_t
 998 store_temp_pwm_enable(struct device *dev, struct device_attribute *attr,
 999           const char *buf, size_t count)
1000 {
1001         struct i2c_client *client = to_i2c_client(dev);
1002         struct w83795_data *data = w83795_update_pwm_config(dev);
1003         struct sensor_device_attribute_2 *sensor_attr =
1004             to_sensor_dev_attr_2(attr);
1005         int nr = sensor_attr->nr;
1006         int index = sensor_attr->index;
1007         unsigned long tmp;
1008
1009         if (strict_strtoul(buf, 10, &tmp) < 0)
1010                 return -EINVAL;
1011
1012         switch (nr) {
1013         case TEMP_PWM_ENABLE:
1014                 if ((tmp != 3) && (tmp != 4))
1015                         return -EINVAL;
1016                 tmp -= 3;
1017                 mutex_lock(&data->update_lock);
1018                 data->pwm_fcms[1] &= ~(1 << index);
1019                 data->pwm_fcms[1] |= tmp << index;
1020                 w83795_write(client, W83795_REG_FCMS2, data->pwm_fcms[1]);
1021                 mutex_unlock(&data->update_lock);
1022                 break;
1023         case TEMP_PWM_FAN_MAP:
1024                 mutex_lock(&data->update_lock);
1025                 tmp = SENSORS_LIMIT(tmp, 0, 0xff);
1026                 w83795_write(client, W83795_REG_TFMR(index), tmp);
1027                 data->pwm_tfmr[index] = tmp;
1028                 mutex_unlock(&data->update_lock);
1029                 break;
1030         }
1031         return count;
1032 }
1033
1034 #define FANIN_TARGET   0
1035 #define FANIN_TOL      1
1036 static ssize_t
1037 show_fanin(struct device *dev, struct device_attribute *attr, char *buf)
1038 {
1039         struct w83795_data *data = w83795_update_pwm_config(dev);
1040         struct sensor_device_attribute_2 *sensor_attr =
1041             to_sensor_dev_attr_2(attr);
1042         int nr = sensor_attr->nr;
1043         int index = sensor_attr->index;
1044         u16 tmp = 0;
1045
1046         switch (nr) {
1047         case FANIN_TARGET:
1048                 tmp = fan_from_reg(data->target_speed[index]);
1049                 break;
1050         case FANIN_TOL:
1051                 tmp = data->tol_speed;
1052                 break;
1053         }
1054
1055         return sprintf(buf, "%u\n", tmp);
1056 }
1057
1058 static ssize_t
1059 store_fanin(struct device *dev, struct device_attribute *attr,
1060           const char *buf, size_t count)
1061 {
1062         struct i2c_client *client = to_i2c_client(dev);
1063         struct w83795_data *data = i2c_get_clientdata(client);
1064         struct sensor_device_attribute_2 *sensor_attr =
1065             to_sensor_dev_attr_2(attr);
1066         int nr = sensor_attr->nr;
1067         int index = sensor_attr->index;
1068         unsigned long val;
1069
1070         if (strict_strtoul(buf, 10, &val) < 0)
1071                 return -EINVAL;
1072
1073         mutex_lock(&data->update_lock);
1074         switch (nr) {
1075         case FANIN_TARGET:
1076                 val = fan_to_reg(SENSORS_LIMIT(val, 0, 0xfff));
1077                 w83795_write(client, W83795_REG_FTSH(index), (val >> 4) & 0xff);
1078                 w83795_write(client, W83795_REG_FTSL(index), (val << 4) & 0xf0);
1079                 data->target_speed[index] = val;
1080                 break;
1081         case FANIN_TOL:
1082                 val = SENSORS_LIMIT(val, 0, 0x3f);
1083                 w83795_write(client, W83795_REG_TFTS, val);
1084                 data->tol_speed = val;
1085                 break;
1086         }
1087         mutex_unlock(&data->update_lock);
1088
1089         return count;
1090 }
1091
1092
1093 static ssize_t
1094 show_temp_pwm(struct device *dev, struct device_attribute *attr, char *buf)
1095 {
1096         struct w83795_data *data = w83795_update_pwm_config(dev);
1097         struct sensor_device_attribute_2 *sensor_attr =
1098             to_sensor_dev_attr_2(attr);
1099         int nr = sensor_attr->nr;
1100         int index = sensor_attr->index;
1101         long tmp = temp_from_reg(data->pwm_temp[index][nr]);
1102
1103         return sprintf(buf, "%ld\n", tmp);
1104 }
1105
1106 static ssize_t
1107 store_temp_pwm(struct device *dev, struct device_attribute *attr,
1108           const char *buf, size_t count)
1109 {
1110         struct i2c_client *client = to_i2c_client(dev);
1111         struct w83795_data *data = i2c_get_clientdata(client);
1112         struct sensor_device_attribute_2 *sensor_attr =
1113             to_sensor_dev_attr_2(attr);
1114         int nr = sensor_attr->nr;
1115         int index = sensor_attr->index;
1116         unsigned long val;
1117         u8 tmp;
1118
1119         if (strict_strtoul(buf, 10, &val) < 0)
1120                 return -EINVAL;
1121         val /= 1000;
1122
1123         mutex_lock(&data->update_lock);
1124         switch (nr) {
1125         case TEMP_PWM_TTTI:
1126                 val = SENSORS_LIMIT(val, 0, 0x7f);
1127                 w83795_write(client, W83795_REG_TTTI(index), val);
1128                 break;
1129         case TEMP_PWM_CTFS:
1130                 val = SENSORS_LIMIT(val, 0, 0x7f);
1131                 w83795_write(client, W83795_REG_CTFS(index), val);
1132                 break;
1133         case TEMP_PWM_HCT:
1134                 val = SENSORS_LIMIT(val, 0, 0x0f);
1135                 tmp = w83795_read(client, W83795_REG_HT(index));
1136                 tmp &= 0x0f;
1137                 tmp |= (val << 4) & 0xf0;
1138                 w83795_write(client, W83795_REG_HT(index), tmp);
1139                 break;
1140         case TEMP_PWM_HOT:
1141                 val = SENSORS_LIMIT(val, 0, 0x0f);
1142                 tmp = w83795_read(client, W83795_REG_HT(index));
1143                 tmp &= 0xf0;
1144                 tmp |= val & 0x0f;
1145                 w83795_write(client, W83795_REG_HT(index), tmp);
1146                 break;
1147         }
1148         data->pwm_temp[index][nr] = val;
1149         mutex_unlock(&data->update_lock);
1150
1151         return count;
1152 }
1153
1154 static ssize_t
1155 show_sf4_pwm(struct device *dev, struct device_attribute *attr, char *buf)
1156 {
1157         struct w83795_data *data = w83795_update_pwm_config(dev);
1158         struct sensor_device_attribute_2 *sensor_attr =
1159             to_sensor_dev_attr_2(attr);
1160         int nr = sensor_attr->nr;
1161         int index = sensor_attr->index;
1162
1163         return sprintf(buf, "%u\n", data->sf4_reg[index][SF4_PWM][nr]);
1164 }
1165
1166 static ssize_t
1167 store_sf4_pwm(struct device *dev, struct device_attribute *attr,
1168           const char *buf, size_t count)
1169 {
1170         struct i2c_client *client = to_i2c_client(dev);
1171         struct w83795_data *data = i2c_get_clientdata(client);
1172         struct sensor_device_attribute_2 *sensor_attr =
1173             to_sensor_dev_attr_2(attr);
1174         int nr = sensor_attr->nr;
1175         int index = sensor_attr->index;
1176         unsigned long val;
1177
1178         if (strict_strtoul(buf, 10, &val) < 0)
1179                 return -EINVAL;
1180
1181         mutex_lock(&data->update_lock);
1182         w83795_write(client, W83795_REG_SF4_PWM(index, nr), val);
1183         data->sf4_reg[index][SF4_PWM][nr] = val;
1184         mutex_unlock(&data->update_lock);
1185
1186         return count;
1187 }
1188
1189 static ssize_t
1190 show_sf4_temp(struct device *dev, struct device_attribute *attr, char *buf)
1191 {
1192         struct w83795_data *data = w83795_update_pwm_config(dev);
1193         struct sensor_device_attribute_2 *sensor_attr =
1194             to_sensor_dev_attr_2(attr);
1195         int nr = sensor_attr->nr;
1196         int index = sensor_attr->index;
1197
1198         return sprintf(buf, "%u\n",
1199                 (data->sf4_reg[index][SF4_TEMP][nr]) * 1000);
1200 }
1201
1202 static ssize_t
1203 store_sf4_temp(struct device *dev, struct device_attribute *attr,
1204           const char *buf, size_t count)
1205 {
1206         struct i2c_client *client = to_i2c_client(dev);
1207         struct w83795_data *data = i2c_get_clientdata(client);
1208         struct sensor_device_attribute_2 *sensor_attr =
1209             to_sensor_dev_attr_2(attr);
1210         int nr = sensor_attr->nr;
1211         int index = sensor_attr->index;
1212         unsigned long val;
1213
1214         if (strict_strtoul(buf, 10, &val) < 0)
1215                 return -EINVAL;
1216         val /= 1000;
1217
1218         mutex_lock(&data->update_lock);
1219         w83795_write(client, W83795_REG_SF4_TEMP(index, nr), val);
1220         data->sf4_reg[index][SF4_TEMP][nr] = val;
1221         mutex_unlock(&data->update_lock);
1222
1223         return count;
1224 }
1225
1226
1227 static ssize_t
1228 show_temp(struct device *dev, struct device_attribute *attr, char *buf)
1229 {
1230         struct sensor_device_attribute_2 *sensor_attr =
1231             to_sensor_dev_attr_2(attr);
1232         int nr = sensor_attr->nr;
1233         int index = sensor_attr->index;
1234         struct w83795_data *data = w83795_update_device(dev);
1235         long temp = temp_from_reg(data->temp[index][nr]);
1236
1237         if (TEMP_READ == nr)
1238                 temp += (data->temp_read_vrlsb[index] >> 6) * 250;
1239         return sprintf(buf, "%ld\n", temp);
1240 }
1241
1242 static ssize_t
1243 store_temp(struct device *dev, struct device_attribute *attr,
1244            const char *buf, size_t count)
1245 {
1246         struct sensor_device_attribute_2 *sensor_attr =
1247             to_sensor_dev_attr_2(attr);
1248         int nr = sensor_attr->nr;
1249         int index = sensor_attr->index;
1250         struct i2c_client *client = to_i2c_client(dev);
1251         struct w83795_data *data = i2c_get_clientdata(client);
1252         long tmp;
1253
1254         if (strict_strtol(buf, 10, &tmp) < 0)
1255                 return -EINVAL;
1256
1257         mutex_lock(&data->update_lock);
1258         data->temp[index][nr] = temp_to_reg(tmp, -128, 127);
1259         w83795_write(client, W83795_REG_TEMP[index][nr], data->temp[index][nr]);
1260         mutex_unlock(&data->update_lock);
1261         return count;
1262 }
1263
1264
1265 static ssize_t
1266 show_dts_mode(struct device *dev, struct device_attribute *attr, char *buf)
1267 {
1268         struct i2c_client *client = to_i2c_client(dev);
1269         struct w83795_data *data = i2c_get_clientdata(client);
1270         int tmp;
1271
1272         if (data->enable_dts & 2)
1273                 tmp = 5;
1274         else
1275                 tmp = 6;
1276
1277         return sprintf(buf, "%d\n", tmp);
1278 }
1279
1280 static ssize_t
1281 show_dts(struct device *dev, struct device_attribute *attr, char *buf)
1282 {
1283         struct sensor_device_attribute_2 *sensor_attr =
1284             to_sensor_dev_attr_2(attr);
1285         int index = sensor_attr->index;
1286         struct w83795_data *data = w83795_update_device(dev);
1287         long temp = temp_from_reg(data->dts[index]);
1288
1289         temp += (data->dts_read_vrlsb[index] >> 6) * 250;
1290         return sprintf(buf, "%ld\n", temp);
1291 }
1292
1293 static ssize_t
1294 show_dts_ext(struct device *dev, struct device_attribute *attr, char *buf)
1295 {
1296         struct sensor_device_attribute_2 *sensor_attr =
1297             to_sensor_dev_attr_2(attr);
1298         int nr = sensor_attr->nr;
1299         struct i2c_client *client = to_i2c_client(dev);
1300         struct w83795_data *data = i2c_get_clientdata(client);
1301         long temp = temp_from_reg(data->dts_ext[nr]);
1302
1303         return sprintf(buf, "%ld\n", temp);
1304 }
1305
1306 static ssize_t
1307 store_dts_ext(struct device *dev, struct device_attribute *attr,
1308            const char *buf, size_t count)
1309 {
1310         struct sensor_device_attribute_2 *sensor_attr =
1311             to_sensor_dev_attr_2(attr);
1312         int nr = sensor_attr->nr;
1313         struct i2c_client *client = to_i2c_client(dev);
1314         struct w83795_data *data = i2c_get_clientdata(client);
1315         long tmp;
1316
1317         if (strict_strtol(buf, 10, &tmp) < 0)
1318                 return -EINVAL;
1319
1320         mutex_lock(&data->update_lock);
1321         data->dts_ext[nr] = temp_to_reg(tmp, -128, 127);
1322         w83795_write(client, W83795_REG_DTS_EXT(nr), data->dts_ext[nr]);
1323         mutex_unlock(&data->update_lock);
1324         return count;
1325 }
1326
1327
1328 static ssize_t
1329 show_temp_mode(struct device *dev, struct device_attribute *attr, char *buf)
1330 {
1331         struct i2c_client *client = to_i2c_client(dev);
1332         struct w83795_data *data = i2c_get_clientdata(client);
1333         struct sensor_device_attribute_2 *sensor_attr =
1334             to_sensor_dev_attr_2(attr);
1335         int index = sensor_attr->index;
1336         int tmp;
1337
1338         if (data->temp_mode & (1 << index))
1339                 tmp = 3;        /* Thermal diode */
1340         else
1341                 tmp = 4;        /* Thermistor */
1342
1343         return sprintf(buf, "%d\n", tmp);
1344 }
1345
1346 /* Only for temp1-4 (temp5-6 can only be thermistor) */
1347 static ssize_t
1348 store_temp_mode(struct device *dev, struct device_attribute *attr,
1349                 const char *buf, size_t count)
1350 {
1351         struct i2c_client *client = to_i2c_client(dev);
1352         struct w83795_data *data = i2c_get_clientdata(client);
1353         struct sensor_device_attribute_2 *sensor_attr =
1354             to_sensor_dev_attr_2(attr);
1355         int index = sensor_attr->index;
1356         int reg_shift;
1357         unsigned long val;
1358         u8 tmp;
1359
1360         if (strict_strtoul(buf, 10, &val) < 0)
1361                 return -EINVAL;
1362         if ((val != 4) && (val != 3))
1363                 return -EINVAL;
1364
1365         mutex_lock(&data->update_lock);
1366         if (val == 3) {
1367                 /* Thermal diode */
1368                 val = 0x01;
1369                 data->temp_mode |= 1 << index;
1370         } else if (val == 4) {
1371                 /* Thermistor */
1372                 val = 0x03;
1373                 data->temp_mode &= ~(1 << index);
1374         }
1375
1376         reg_shift = 2 * index;
1377         tmp = w83795_read(client, W83795_REG_TEMP_CTRL2);
1378         tmp &= ~(0x03 << reg_shift);
1379         tmp |= val << reg_shift;
1380         w83795_write(client, W83795_REG_TEMP_CTRL2, tmp);
1381
1382         mutex_unlock(&data->update_lock);
1383         return count;
1384 }
1385
1386
1387 /* show/store VIN */
1388 static ssize_t
1389 show_in(struct device *dev, struct device_attribute *attr, char *buf)
1390 {
1391         struct sensor_device_attribute_2 *sensor_attr =
1392             to_sensor_dev_attr_2(attr);
1393         int nr = sensor_attr->nr;
1394         int index = sensor_attr->index;
1395         struct w83795_data *data = w83795_update_device(dev);
1396         u16 val = data->in[index][nr];
1397         u8 lsb_idx;
1398
1399         switch (nr) {
1400         case IN_READ:
1401                 /* calculate this value again by sensors as sensors3.conf */
1402                 if ((index >= 17) &&
1403                     !((data->has_gain >> (index - 17)) & 1))
1404                         val *= 8;
1405                 break;
1406         case IN_MAX:
1407         case IN_LOW:
1408                 lsb_idx = IN_LSB_SHIFT_IDX[index][IN_LSB_IDX];
1409                 val <<= 2;
1410                 val |= (data->in_lsb[lsb_idx][nr] >>
1411                         IN_LSB_SHIFT_IDX[lsb_idx][IN_LSB_SHIFT]) & 0x03;
1412                 if ((index >= 17) &&
1413                     !((data->has_gain >> (index - 17)) & 1))
1414                         val *= 8;
1415                 break;
1416         }
1417         val = in_from_reg(index, val);
1418
1419         return sprintf(buf, "%d\n", val);
1420 }
1421
1422 static ssize_t
1423 store_in(struct device *dev, struct device_attribute *attr,
1424          const char *buf, size_t count)
1425 {
1426         struct sensor_device_attribute_2 *sensor_attr =
1427             to_sensor_dev_attr_2(attr);
1428         int nr = sensor_attr->nr;
1429         int index = sensor_attr->index;
1430         struct i2c_client *client = to_i2c_client(dev);
1431         struct w83795_data *data = i2c_get_clientdata(client);
1432         unsigned long val;
1433         u8 tmp;
1434         u8 lsb_idx;
1435
1436         if (strict_strtoul(buf, 10, &val) < 0)
1437                 return -EINVAL;
1438         val = in_to_reg(index, val);
1439
1440         if ((index >= 17) &&
1441             !((data->has_gain >> (index - 17)) & 1))
1442                 val /= 8;
1443         val = SENSORS_LIMIT(val, 0, 0x3FF);
1444         mutex_lock(&data->update_lock);
1445
1446         lsb_idx = IN_LSB_SHIFT_IDX[index][IN_LSB_IDX];
1447         tmp = w83795_read(client, IN_LSB_REG(lsb_idx, nr));
1448         tmp &= ~(0x03 << IN_LSB_SHIFT_IDX[index][IN_LSB_SHIFT]);
1449         tmp |= (val & 0x03) << IN_LSB_SHIFT_IDX[index][IN_LSB_SHIFT];
1450         w83795_write(client, IN_LSB_REG(lsb_idx, nr), tmp);
1451         data->in_lsb[lsb_idx][nr] = tmp;
1452
1453         tmp = (val >> 2) & 0xff;
1454         w83795_write(client, W83795_REG_IN[index][nr], tmp);
1455         data->in[index][nr] = tmp;
1456
1457         mutex_unlock(&data->update_lock);
1458         return count;
1459 }
1460
1461
1462 static ssize_t
1463 show_sf_setup(struct device *dev, struct device_attribute *attr, char *buf)
1464 {
1465         struct sensor_device_attribute_2 *sensor_attr =
1466             to_sensor_dev_attr_2(attr);
1467         int nr = sensor_attr->nr;
1468         struct w83795_data *data = w83795_update_pwm_config(dev);
1469         u16 val = data->setup_pwm[nr];
1470
1471         switch (nr) {
1472         case SETUP_PWM_UPTIME:
1473         case SETUP_PWM_DOWNTIME:
1474                 val = time_from_reg(val);
1475                 break;
1476         }
1477
1478         return sprintf(buf, "%d\n", val);
1479 }
1480
1481 static ssize_t
1482 store_sf_setup(struct device *dev, struct device_attribute *attr,
1483          const char *buf, size_t count)
1484 {
1485         struct sensor_device_attribute_2 *sensor_attr =
1486             to_sensor_dev_attr_2(attr);
1487         int nr = sensor_attr->nr;
1488         struct i2c_client *client = to_i2c_client(dev);
1489         struct w83795_data *data = i2c_get_clientdata(client);
1490         unsigned long val;
1491
1492         if (strict_strtoul(buf, 10, &val) < 0)
1493                 return -EINVAL;
1494
1495         switch (nr) {
1496         case SETUP_PWM_DEFAULT:
1497                 val = SENSORS_LIMIT(val, 0, 0xff);
1498                 break;
1499         case SETUP_PWM_UPTIME:
1500         case SETUP_PWM_DOWNTIME:
1501                 val = time_to_reg(val);
1502                 if (val == 0)
1503                         return -EINVAL;
1504                 break;
1505         }
1506
1507         mutex_lock(&data->update_lock);
1508         data->setup_pwm[nr] = val;
1509         w83795_write(client, W83795_REG_SETUP_PWM(nr), val);
1510         mutex_unlock(&data->update_lock);
1511         return count;
1512 }
1513
1514
1515 #define NOT_USED                        -1
1516
1517 /* Don't change the attribute order, _max and _min are accessed by index
1518  * somewhere else in the code */
1519 #define SENSOR_ATTR_IN(index) {                                         \
1520         SENSOR_ATTR_2(in##index##_input, S_IRUGO, show_in, NULL,        \
1521                 IN_READ, index), \
1522         SENSOR_ATTR_2(in##index##_max, S_IRUGO | S_IWUSR, show_in,      \
1523                 store_in, IN_MAX, index),                               \
1524         SENSOR_ATTR_2(in##index##_min, S_IRUGO | S_IWUSR, show_in,      \
1525                 store_in, IN_LOW, index),                               \
1526         SENSOR_ATTR_2(in##index##_alarm, S_IRUGO, show_alarm_beep,      \
1527                 NULL, ALARM_STATUS, index + ((index > 14) ? 1 : 0)), \
1528         SENSOR_ATTR_2(in##index##_beep, S_IWUSR | S_IRUGO,              \
1529                 show_alarm_beep, store_beep, BEEP_ENABLE,               \
1530                 index + ((index > 14) ? 1 : 0)) }
1531
1532 #define SENSOR_ATTR_FAN(index) {                                        \
1533         SENSOR_ATTR_2(fan##index##_input, S_IRUGO, show_fan,            \
1534                 NULL, FAN_INPUT, index - 1), \
1535         SENSOR_ATTR_2(fan##index##_min, S_IWUSR | S_IRUGO,              \
1536                 show_fan, store_fan_min, FAN_MIN, index - 1),   \
1537         SENSOR_ATTR_2(fan##index##_alarm, S_IRUGO, show_alarm_beep,     \
1538                 NULL, ALARM_STATUS, index + 31),                        \
1539         SENSOR_ATTR_2(fan##index##_beep, S_IWUSR | S_IRUGO,             \
1540                 show_alarm_beep, store_beep, BEEP_ENABLE, index + 31) }
1541
1542 #define SENSOR_ATTR_PWM(index) {                                        \
1543         SENSOR_ATTR_2(pwm##index, S_IWUSR | S_IRUGO, show_pwm,          \
1544                 store_pwm, PWM_OUTPUT, index - 1),                      \
1545         SENSOR_ATTR_2(pwm##index##_nonstop, S_IWUSR | S_IRUGO,          \
1546                 show_pwm, store_pwm, PWM_NONSTOP, index - 1),           \
1547         SENSOR_ATTR_2(pwm##index##_start, S_IWUSR | S_IRUGO,            \
1548                 show_pwm, store_pwm, PWM_START, index - 1),             \
1549         SENSOR_ATTR_2(pwm##index##_stop_time, S_IWUSR | S_IRUGO,        \
1550                 show_pwm, store_pwm, PWM_STOP_TIME, index - 1),  \
1551         SENSOR_ATTR_2(pwm##index##_freq, S_IWUSR | S_IRUGO,     \
1552                 show_pwm, store_pwm, PWM_FREQ, index - 1),       \
1553         SENSOR_ATTR_2(pwm##index##_enable, S_IWUSR | S_IRUGO,           \
1554                 show_pwm_enable, store_pwm_enable, NOT_USED, index - 1), \
1555         SENSOR_ATTR_2(fan##index##_target, S_IWUSR | S_IRUGO, \
1556                 show_fanin, store_fanin, FANIN_TARGET, index - 1) }
1557
1558 #define SENSOR_ATTR_DTS(index) {                                        \
1559         SENSOR_ATTR_2(temp##index##_type, S_IRUGO ,             \
1560                 show_dts_mode, NULL, NOT_USED, index - 7),      \
1561         SENSOR_ATTR_2(temp##index##_input, S_IRUGO, show_dts,           \
1562                 NULL, NOT_USED, index - 7),                             \
1563         SENSOR_ATTR_2(temp##index##_crit, S_IRUGO | S_IWUSR, show_dts_ext, \
1564                 store_dts_ext, DTS_CRIT, NOT_USED),                     \
1565         SENSOR_ATTR_2(temp##index##_crit_hyst, S_IRUGO | S_IWUSR,       \
1566                 show_dts_ext, store_dts_ext, DTS_CRIT_HYST, NOT_USED),  \
1567         SENSOR_ATTR_2(temp##index##_max, S_IRUGO | S_IWUSR, show_dts_ext, \
1568                 store_dts_ext, DTS_WARN, NOT_USED),                     \
1569         SENSOR_ATTR_2(temp##index##_max_hyst, S_IRUGO | S_IWUSR,        \
1570                 show_dts_ext, store_dts_ext, DTS_WARN_HYST, NOT_USED),  \
1571         SENSOR_ATTR_2(temp##index##_alarm, S_IRUGO,                     \
1572                 show_alarm_beep, NULL, ALARM_STATUS, index + 17),       \
1573         SENSOR_ATTR_2(temp##index##_beep, S_IWUSR | S_IRUGO,            \
1574                 show_alarm_beep, store_beep, BEEP_ENABLE, index + 17) }
1575
1576 #define SENSOR_ATTR_TEMP(index) {                                       \
1577         SENSOR_ATTR_2(temp##index##_type, S_IRUGO | (index < 4 ? S_IWUSR : 0), \
1578                 show_temp_mode, store_temp_mode, NOT_USED, index - 1),  \
1579         SENSOR_ATTR_2(temp##index##_input, S_IRUGO, show_temp,          \
1580                 NULL, TEMP_READ, index - 1),                            \
1581         SENSOR_ATTR_2(temp##index##_crit, S_IRUGO | S_IWUSR, show_temp, \
1582                 store_temp, TEMP_CRIT, index - 1),                      \
1583         SENSOR_ATTR_2(temp##index##_crit_hyst, S_IRUGO | S_IWUSR,       \
1584                 show_temp, store_temp, TEMP_CRIT_HYST, index - 1),      \
1585         SENSOR_ATTR_2(temp##index##_max, S_IRUGO | S_IWUSR, show_temp,  \
1586                 store_temp, TEMP_WARN, index - 1),                      \
1587         SENSOR_ATTR_2(temp##index##_max_hyst, S_IRUGO | S_IWUSR,        \
1588                 show_temp, store_temp, TEMP_WARN_HYST, index - 1),      \
1589         SENSOR_ATTR_2(temp##index##_alarm, S_IRUGO,                     \
1590                 show_alarm_beep, NULL, ALARM_STATUS,                    \
1591                 index + (index > 4 ? 11 : 17)),                         \
1592         SENSOR_ATTR_2(temp##index##_beep, S_IWUSR | S_IRUGO,            \
1593                 show_alarm_beep, store_beep, BEEP_ENABLE,               \
1594                 index + (index > 4 ? 11 : 17)),                         \
1595         SENSOR_ATTR_2(temp##index##_source_sel, S_IWUSR | S_IRUGO,      \
1596                 show_temp_src, store_temp_src, NOT_USED, index - 1),    \
1597         SENSOR_ATTR_2(temp##index##_pwm_enable, S_IWUSR | S_IRUGO,      \
1598                 show_temp_pwm_enable, store_temp_pwm_enable,            \
1599                 TEMP_PWM_ENABLE, index - 1),                            \
1600         SENSOR_ATTR_2(temp##index##_auto_channels_pwm, S_IWUSR | S_IRUGO, \
1601                 show_temp_pwm_enable, store_temp_pwm_enable,            \
1602                 TEMP_PWM_FAN_MAP, index - 1),                           \
1603         SENSOR_ATTR_2(thermal_cruise##index, S_IWUSR | S_IRUGO,         \
1604                 show_temp_pwm, store_temp_pwm, TEMP_PWM_TTTI, index - 1), \
1605         SENSOR_ATTR_2(temp##index##_warn, S_IWUSR | S_IRUGO,            \
1606                 show_temp_pwm, store_temp_pwm, TEMP_PWM_CTFS, index - 1), \
1607         SENSOR_ATTR_2(temp##index##_warn_hyst, S_IWUSR | S_IRUGO,       \
1608                 show_temp_pwm, store_temp_pwm, TEMP_PWM_HCT, index - 1), \
1609         SENSOR_ATTR_2(temp##index##_operation_hyst, S_IWUSR | S_IRUGO,  \
1610                 show_temp_pwm, store_temp_pwm, TEMP_PWM_HOT, index - 1), \
1611         SENSOR_ATTR_2(temp##index##_auto_point1_pwm, S_IRUGO | S_IWUSR, \
1612                 show_sf4_pwm, store_sf4_pwm, 0, index - 1),             \
1613         SENSOR_ATTR_2(temp##index##_auto_point2_pwm, S_IRUGO | S_IWUSR, \
1614                 show_sf4_pwm, store_sf4_pwm, 1, index - 1),             \
1615         SENSOR_ATTR_2(temp##index##_auto_point3_pwm, S_IRUGO | S_IWUSR, \
1616                 show_sf4_pwm, store_sf4_pwm, 2, index - 1),             \
1617         SENSOR_ATTR_2(temp##index##_auto_point4_pwm, S_IRUGO | S_IWUSR, \
1618                 show_sf4_pwm, store_sf4_pwm, 3, index - 1),             \
1619         SENSOR_ATTR_2(temp##index##_auto_point5_pwm, S_IRUGO | S_IWUSR, \
1620                 show_sf4_pwm, store_sf4_pwm, 4, index - 1),             \
1621         SENSOR_ATTR_2(temp##index##_auto_point6_pwm, S_IRUGO | S_IWUSR, \
1622                 show_sf4_pwm, store_sf4_pwm, 5, index - 1),             \
1623         SENSOR_ATTR_2(temp##index##_auto_point7_pwm, S_IRUGO | S_IWUSR, \
1624                 show_sf4_pwm, store_sf4_pwm, 6, index - 1),             \
1625         SENSOR_ATTR_2(temp##index##_auto_point1_temp, S_IRUGO | S_IWUSR,\
1626                 show_sf4_temp, store_sf4_temp, 0, index - 1),           \
1627         SENSOR_ATTR_2(temp##index##_auto_point2_temp, S_IRUGO | S_IWUSR,\
1628                 show_sf4_temp, store_sf4_temp, 1, index - 1),           \
1629         SENSOR_ATTR_2(temp##index##_auto_point3_temp, S_IRUGO | S_IWUSR,\
1630                 show_sf4_temp, store_sf4_temp, 2, index - 1),           \
1631         SENSOR_ATTR_2(temp##index##_auto_point4_temp, S_IRUGO | S_IWUSR,\
1632                 show_sf4_temp, store_sf4_temp, 3, index - 1),           \
1633         SENSOR_ATTR_2(temp##index##_auto_point5_temp, S_IRUGO | S_IWUSR,\
1634                 show_sf4_temp, store_sf4_temp, 4, index - 1),           \
1635         SENSOR_ATTR_2(temp##index##_auto_point6_temp, S_IRUGO | S_IWUSR,\
1636                 show_sf4_temp, store_sf4_temp, 5, index - 1),           \
1637         SENSOR_ATTR_2(temp##index##_auto_point7_temp, S_IRUGO | S_IWUSR,\
1638                 show_sf4_temp, store_sf4_temp, 6, index - 1) }
1639
1640
1641 static struct sensor_device_attribute_2 w83795_in[][5] = {
1642         SENSOR_ATTR_IN(0),
1643         SENSOR_ATTR_IN(1),
1644         SENSOR_ATTR_IN(2),
1645         SENSOR_ATTR_IN(3),
1646         SENSOR_ATTR_IN(4),
1647         SENSOR_ATTR_IN(5),
1648         SENSOR_ATTR_IN(6),
1649         SENSOR_ATTR_IN(7),
1650         SENSOR_ATTR_IN(8),
1651         SENSOR_ATTR_IN(9),
1652         SENSOR_ATTR_IN(10),
1653         SENSOR_ATTR_IN(11),
1654         SENSOR_ATTR_IN(12),
1655         SENSOR_ATTR_IN(13),
1656         SENSOR_ATTR_IN(14),
1657         SENSOR_ATTR_IN(15),
1658         SENSOR_ATTR_IN(16),
1659         SENSOR_ATTR_IN(17),
1660         SENSOR_ATTR_IN(18),
1661         SENSOR_ATTR_IN(19),
1662         SENSOR_ATTR_IN(20),
1663 };
1664
1665 static const struct sensor_device_attribute_2 w83795_fan[][4] = {
1666         SENSOR_ATTR_FAN(1),
1667         SENSOR_ATTR_FAN(2),
1668         SENSOR_ATTR_FAN(3),
1669         SENSOR_ATTR_FAN(4),
1670         SENSOR_ATTR_FAN(5),
1671         SENSOR_ATTR_FAN(6),
1672         SENSOR_ATTR_FAN(7),
1673         SENSOR_ATTR_FAN(8),
1674         SENSOR_ATTR_FAN(9),
1675         SENSOR_ATTR_FAN(10),
1676         SENSOR_ATTR_FAN(11),
1677         SENSOR_ATTR_FAN(12),
1678         SENSOR_ATTR_FAN(13),
1679         SENSOR_ATTR_FAN(14),
1680 };
1681
1682 static const struct sensor_device_attribute_2 w83795_temp[][29] = {
1683         SENSOR_ATTR_TEMP(1),
1684         SENSOR_ATTR_TEMP(2),
1685         SENSOR_ATTR_TEMP(3),
1686         SENSOR_ATTR_TEMP(4),
1687         SENSOR_ATTR_TEMP(5),
1688         SENSOR_ATTR_TEMP(6),
1689 };
1690
1691 static const struct sensor_device_attribute_2 w83795_dts[][8] = {
1692         SENSOR_ATTR_DTS(7),
1693         SENSOR_ATTR_DTS(8),
1694         SENSOR_ATTR_DTS(9),
1695         SENSOR_ATTR_DTS(10),
1696         SENSOR_ATTR_DTS(11),
1697         SENSOR_ATTR_DTS(12),
1698         SENSOR_ATTR_DTS(13),
1699         SENSOR_ATTR_DTS(14),
1700 };
1701
1702 static const struct sensor_device_attribute_2 w83795_pwm[][7] = {
1703         SENSOR_ATTR_PWM(1),
1704         SENSOR_ATTR_PWM(2),
1705         SENSOR_ATTR_PWM(3),
1706         SENSOR_ATTR_PWM(4),
1707         SENSOR_ATTR_PWM(5),
1708         SENSOR_ATTR_PWM(6),
1709         SENSOR_ATTR_PWM(7),
1710         SENSOR_ATTR_PWM(8),
1711 };
1712
1713 static const struct sensor_device_attribute_2 sda_single_files[] = {
1714         SENSOR_ATTR_2(chassis, S_IWUSR | S_IRUGO, show_alarm_beep,
1715                       store_chassis_clear, ALARM_STATUS, 46),
1716         SENSOR_ATTR_2(beep_enable, S_IWUSR | S_IRUGO, show_alarm_beep,
1717                       store_beep, BEEP_ENABLE, 47),
1718         SENSOR_ATTR_2(speed_cruise_tolerance, S_IWUSR | S_IRUGO, show_fanin,
1719                 store_fanin, FANIN_TOL, NOT_USED),
1720         SENSOR_ATTR_2(pwm_default, S_IWUSR | S_IRUGO, show_sf_setup,
1721                       store_sf_setup, SETUP_PWM_DEFAULT, NOT_USED),
1722         SENSOR_ATTR_2(pwm_uptime, S_IWUSR | S_IRUGO, show_sf_setup,
1723                       store_sf_setup, SETUP_PWM_UPTIME, NOT_USED),
1724         SENSOR_ATTR_2(pwm_downtime, S_IWUSR | S_IRUGO, show_sf_setup,
1725                       store_sf_setup, SETUP_PWM_DOWNTIME, NOT_USED),
1726 };
1727
1728 /*
1729  * Driver interface
1730  */
1731
1732 static void w83795_init_client(struct i2c_client *client)
1733 {
1734         struct w83795_data *data = i2c_get_clientdata(client);
1735         static const u16 clkin[4] = {   /* in kHz */
1736                 14318, 24000, 33333, 48000
1737         };
1738         u8 config;
1739
1740         if (reset)
1741                 w83795_write(client, W83795_REG_CONFIG, 0x80);
1742
1743         /* Start monitoring if needed */
1744         config = w83795_read(client, W83795_REG_CONFIG);
1745         if (!(config & W83795_REG_CONFIG_START)) {
1746                 dev_info(&client->dev, "Enabling monitoring operations\n");
1747                 w83795_write(client, W83795_REG_CONFIG,
1748                              config | W83795_REG_CONFIG_START);
1749         }
1750
1751         data->clkin = clkin[(config >> 3) & 0x3];
1752         dev_dbg(&client->dev, "clkin = %u kHz\n", data->clkin);
1753 }
1754
1755 static int w83795_get_device_id(struct i2c_client *client)
1756 {
1757         int device_id;
1758
1759         device_id = i2c_smbus_read_byte_data(client, W83795_REG_DEVICEID);
1760
1761         /* Special case for rev. A chips; can't be checked first because later
1762            revisions emulate this for compatibility */
1763         if (device_id < 0 || (device_id & 0xf0) != 0x50) {
1764                 int alt_id;
1765
1766                 alt_id = i2c_smbus_read_byte_data(client,
1767                                                   W83795_REG_DEVICEID_A);
1768                 if (alt_id == 0x50)
1769                         device_id = alt_id;
1770         }
1771
1772         return device_id;
1773 }
1774
1775 /* Return 0 if detection is successful, -ENODEV otherwise */
1776 static int w83795_detect(struct i2c_client *client,
1777                          struct i2c_board_info *info)
1778 {
1779         int bank, vendor_id, device_id, expected, i2c_addr, config;
1780         struct i2c_adapter *adapter = client->adapter;
1781         unsigned short address = client->addr;
1782         const char *chip_name;
1783
1784         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1785                 return -ENODEV;
1786         bank = i2c_smbus_read_byte_data(client, W83795_REG_BANKSEL);
1787         if (bank < 0 || (bank & 0x7c)) {
1788                 dev_dbg(&adapter->dev,
1789                         "w83795: Detection failed at addr 0x%02hx, check %s\n",
1790                         address, "bank");
1791                 return -ENODEV;
1792         }
1793
1794         /* Check Nuvoton vendor ID */
1795         vendor_id = i2c_smbus_read_byte_data(client, W83795_REG_VENDORID);
1796         expected = bank & 0x80 ? 0x5c : 0xa3;
1797         if (vendor_id != expected) {
1798                 dev_dbg(&adapter->dev,
1799                         "w83795: Detection failed at addr 0x%02hx, check %s\n",
1800                         address, "vendor id");
1801                 return -ENODEV;
1802         }
1803
1804         /* Check device ID */
1805         device_id = w83795_get_device_id(client) |
1806                     (i2c_smbus_read_byte_data(client, W83795_REG_CHIPID) << 8);
1807         if ((device_id >> 4) != 0x795) {
1808                 dev_dbg(&adapter->dev,
1809                         "w83795: Detection failed at addr 0x%02hx, check %s\n",
1810                         address, "device id\n");
1811                 return -ENODEV;
1812         }
1813
1814         /* If Nuvoton chip, address of chip and W83795_REG_I2C_ADDR
1815            should match */
1816         if ((bank & 0x07) == 0) {
1817                 i2c_addr = i2c_smbus_read_byte_data(client,
1818                                                     W83795_REG_I2C_ADDR);
1819                 if ((i2c_addr & 0x7f) != address) {
1820                         dev_dbg(&adapter->dev,
1821                                 "w83795: Detection failed at addr 0x%02hx, "
1822                                 "check %s\n", address, "i2c addr");
1823                         return -ENODEV;
1824                 }
1825         }
1826
1827         /* Check 795 chip type: 795G or 795ADG
1828            Usually we don't write to chips during detection, but here we don't
1829            quite have the choice; hopefully it's OK, we are about to return
1830            success anyway */
1831         if ((bank & 0x07) != 0)
1832                 i2c_smbus_write_byte_data(client, W83795_REG_BANKSEL,
1833                                           bank & ~0x07);
1834         config = i2c_smbus_read_byte_data(client, W83795_REG_CONFIG);
1835         if (config & W83795_REG_CONFIG_CONFIG48)
1836                 chip_name = "w83795adg";
1837         else
1838                 chip_name = "w83795g";
1839
1840         strlcpy(info->type, chip_name, I2C_NAME_SIZE);
1841         dev_info(&adapter->dev, "Found %s rev. %c at 0x%02hx\n", chip_name,
1842                  'A' + (device_id & 0xf), address);
1843
1844         return 0;
1845 }
1846
1847 static int w83795_handle_files(struct device *dev, int (*fn)(struct device *,
1848                                const struct device_attribute *))
1849 {
1850         struct w83795_data *data = dev_get_drvdata(dev);
1851         int err, i, j;
1852
1853         for (i = 0; i < ARRAY_SIZE(w83795_in); i++) {
1854                 if (!(data->has_in & (1 << i)))
1855                         continue;
1856                 for (j = 0; j < ARRAY_SIZE(w83795_in[0]); j++) {
1857                         err = fn(dev, &w83795_in[i][j].dev_attr);
1858                         if (err)
1859                                 return err;
1860                 }
1861         }
1862
1863         for (i = 0; i < ARRAY_SIZE(w83795_fan); i++) {
1864                 if (!(data->has_fan & (1 << i)))
1865                         continue;
1866                 for (j = 0; j < ARRAY_SIZE(w83795_fan[0]); j++) {
1867                         err = fn(dev, &w83795_fan[i][j].dev_attr);
1868                         if (err)
1869                                 return err;
1870                 }
1871         }
1872
1873         for (i = 0; i < ARRAY_SIZE(sda_single_files); i++) {
1874                 err = fn(dev, &sda_single_files[i].dev_attr);
1875                 if (err)
1876                         return err;
1877         }
1878
1879         for (i = 0; i < data->has_pwm; i++) {
1880                 for (j = 0; j < ARRAY_SIZE(w83795_pwm[0]); j++) {
1881                         err = fn(dev, &w83795_pwm[i][j].dev_attr);
1882                         if (err)
1883                                 return err;
1884                 }
1885         }
1886
1887         for (i = 0; i < ARRAY_SIZE(w83795_temp); i++) {
1888                 if (!(data->has_temp & (1 << i)))
1889                         continue;
1890                 for (j = 0; j < ARRAY_SIZE(w83795_temp[0]); j++) {
1891                         err = fn(dev, &w83795_temp[i][j].dev_attr);
1892                         if (err)
1893                                 return err;
1894                 }
1895         }
1896
1897         if (data->enable_dts != 0) {
1898                 for (i = 0; i < ARRAY_SIZE(w83795_dts); i++) {
1899                         if (!(data->has_dts & (1 << i)))
1900                                 continue;
1901                         for (j = 0; j < ARRAY_SIZE(w83795_dts[0]); j++) {
1902                                 err = fn(dev, &w83795_dts[i][j].dev_attr);
1903                                 if (err)
1904                                         return err;
1905                         }
1906                 }
1907         }
1908
1909         return 0;
1910 }
1911
1912 /* We need a wrapper that fits in w83795_handle_files */
1913 static int device_remove_file_wrapper(struct device *dev,
1914                                       const struct device_attribute *attr)
1915 {
1916         device_remove_file(dev, attr);
1917         return 0;
1918 }
1919
1920 static void w83795_check_dynamic_in_limits(struct i2c_client *client)
1921 {
1922         struct w83795_data *data = i2c_get_clientdata(client);
1923         u8 vid_ctl;
1924         int i, err_max, err_min;
1925
1926         vid_ctl = w83795_read(client, W83795_REG_VID_CTRL);
1927
1928         /* Return immediately if VRM isn't configured */
1929         if ((vid_ctl & 0x07) == 0x00 || (vid_ctl & 0x07) == 0x07)
1930                 return;
1931
1932         data->has_dyn_in = (vid_ctl >> 3) & 0x07;
1933         for (i = 0; i < 2; i++) {
1934                 if (!(data->has_dyn_in & (1 << i)))
1935                         continue;
1936
1937                 /* Voltage limits in dynamic mode, switch to read-only */
1938                 err_max = sysfs_chmod_file(&client->dev.kobj,
1939                                            &w83795_in[i][2].dev_attr.attr,
1940                                            S_IRUGO);
1941                 err_min = sysfs_chmod_file(&client->dev.kobj,
1942                                            &w83795_in[i][3].dev_attr.attr,
1943                                            S_IRUGO);
1944                 if (err_max || err_min)
1945                         dev_warn(&client->dev, "Failed to set in%d limits "
1946                                  "read-only (%d, %d)\n", i, err_max, err_min);
1947                 else
1948                         dev_info(&client->dev, "in%d limits set dynamically "
1949                                  "from VID\n", i);
1950         }
1951 }
1952
1953 /* Check pins that can be used for either temperature or voltage monitoring */
1954 static void w83795_apply_temp_config(struct w83795_data *data, u8 config,
1955                                      int temp_chan, int in_chan)
1956 {
1957         /* config is a 2-bit value */
1958         switch (config) {
1959         case 0x2: /* Voltage monitoring */
1960                 data->has_in |= 1 << in_chan;
1961                 break;
1962         case 0x1: /* Thermal diode */
1963                 if (temp_chan >= 4)
1964                         break;
1965                 data->temp_mode |= 1 << temp_chan;
1966                 /* fall through */
1967         case 0x3: /* Thermistor */
1968                 data->has_temp |= 1 << temp_chan;
1969                 break;
1970         }
1971 }
1972
1973 static int w83795_probe(struct i2c_client *client,
1974                         const struct i2c_device_id *id)
1975 {
1976         int i;
1977         u8 tmp;
1978         struct device *dev = &client->dev;
1979         struct w83795_data *data;
1980         int err;
1981
1982         data = kzalloc(sizeof(struct w83795_data), GFP_KERNEL);
1983         if (!data) {
1984                 err = -ENOMEM;
1985                 goto exit;
1986         }
1987
1988         i2c_set_clientdata(client, data);
1989         data->chip_type = id->driver_data;
1990         data->bank = i2c_smbus_read_byte_data(client, W83795_REG_BANKSEL);
1991         mutex_init(&data->update_lock);
1992
1993         /* Initialize the chip */
1994         w83795_init_client(client);
1995
1996         /* Check which voltages and fans are present */
1997         data->has_in = w83795_read(client, W83795_REG_VOLT_CTRL1)
1998                      | (w83795_read(client, W83795_REG_VOLT_CTRL2) << 8);
1999         data->has_fan = w83795_read(client, W83795_REG_FANIN_CTRL1)
2000                       | (w83795_read(client, W83795_REG_FANIN_CTRL2) << 8);
2001
2002         /* Check which analog temperatures and extra voltages are present */
2003         tmp = w83795_read(client, W83795_REG_TEMP_CTRL1);
2004         if (tmp & 0x20)
2005                 data->enable_dts = 1;
2006         w83795_apply_temp_config(data, (tmp >> 2) & 0x3, 5, 16);
2007         w83795_apply_temp_config(data, tmp & 0x3, 4, 15);
2008         tmp = w83795_read(client, W83795_REG_TEMP_CTRL2);
2009         w83795_apply_temp_config(data, tmp >> 6, 3, 20);
2010         w83795_apply_temp_config(data, (tmp >> 4) & 0x3, 2, 19);
2011         w83795_apply_temp_config(data, (tmp >> 2) & 0x3, 1, 18);
2012         w83795_apply_temp_config(data, tmp & 0x3, 0, 17);
2013
2014         /* Check DTS enable status */
2015         if (data->enable_dts) {
2016                 if (1 & w83795_read(client, W83795_REG_DTSC))
2017                         data->enable_dts |= 2;
2018                 data->has_dts = w83795_read(client, W83795_REG_DTSE);
2019         }
2020
2021         /* Report PECI Tbase values */
2022         if (data->enable_dts == 1) {
2023                 for (i = 0; i < 8; i++) {
2024                         if (!(data->has_dts & (1 << i)))
2025                                 continue;
2026                         tmp = w83795_read(client, W83795_REG_PECI_TBASE(i));
2027                         dev_info(&client->dev,
2028                                  "PECI agent %d Tbase temperature: %u\n",
2029                                  i + 1, (unsigned int)tmp & 0x7f);
2030                 }
2031         }
2032
2033         data->has_gain = w83795_read(client, W83795_REG_VMIGB_CTRL) & 0x0f;
2034
2035         /* pwm and smart fan */
2036         if (data->chip_type == w83795g)
2037                 data->has_pwm = 8;
2038         else
2039                 data->has_pwm = 2;
2040
2041         err = w83795_handle_files(dev, device_create_file);
2042         if (err)
2043                 goto exit_remove;
2044
2045         if (data->chip_type == w83795g)
2046                 w83795_check_dynamic_in_limits(client);
2047
2048         data->hwmon_dev = hwmon_device_register(dev);
2049         if (IS_ERR(data->hwmon_dev)) {
2050                 err = PTR_ERR(data->hwmon_dev);
2051                 goto exit_remove;
2052         }
2053
2054         return 0;
2055
2056 exit_remove:
2057         w83795_handle_files(dev, device_remove_file_wrapper);
2058         kfree(data);
2059 exit:
2060         return err;
2061 }
2062
2063 static int w83795_remove(struct i2c_client *client)
2064 {
2065         struct w83795_data *data = i2c_get_clientdata(client);
2066
2067         hwmon_device_unregister(data->hwmon_dev);
2068         w83795_handle_files(&client->dev, device_remove_file_wrapper);
2069         kfree(data);
2070
2071         return 0;
2072 }
2073
2074
2075 static const struct i2c_device_id w83795_id[] = {
2076         { "w83795g", w83795g },
2077         { "w83795adg", w83795adg },
2078         { }
2079 };
2080 MODULE_DEVICE_TABLE(i2c, w83795_id);
2081
2082 static struct i2c_driver w83795_driver = {
2083         .driver = {
2084                    .name = "w83795",
2085         },
2086         .probe          = w83795_probe,
2087         .remove         = w83795_remove,
2088         .id_table       = w83795_id,
2089
2090         .class          = I2C_CLASS_HWMON,
2091         .detect         = w83795_detect,
2092         .address_list   = normal_i2c,
2093 };
2094
2095 static int __init sensors_w83795_init(void)
2096 {
2097         return i2c_add_driver(&w83795_driver);
2098 }
2099
2100 static void __exit sensors_w83795_exit(void)
2101 {
2102         i2c_del_driver(&w83795_driver);
2103 }
2104
2105 MODULE_AUTHOR("Wei Song");
2106 MODULE_DESCRIPTION("W83795G/ADG hardware monitoring driver");
2107 MODULE_LICENSE("GPL");
2108
2109 module_init(sensors_w83795_init);
2110 module_exit(sensors_w83795_exit);