drivers/hwmon/w83795.c

   1 /*
   2  *  w83795.c - Linux kernel driver for hardware monitoring
   3  *  Copyright (C) 2008 Nuvoton Technology Corp.
   4  *                Wei Song
   5  *  Copyright (C) 2010 Jean Delvare <khali@linux-fr.org>
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation - version 2.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19  *  02110-1301 USA.
  20  *
  21  *  Supports following chips:
  22  *
  23  *  Chip       #vin   #fanin #pwm #temp #dts wchipid  vendid  i2c  ISA
  24  *  w83795g     21     14     8     6     8    0x79   0x5ca3  yes   no
  25  *  w83795adg   18     14     2     6     8    0x79   0x5ca3  yes   no
  26  */
  27
  28 #include <linux/kernel.h>
  29 #include <linux/module.h>
  30 #include <linux/init.h>
  31 #include <linux/slab.h>
  32 #include <linux/i2c.h>
  33 #include <linux/hwmon.h>
  34 #include <linux/hwmon-sysfs.h>
  35 #include <linux/err.h>
  36 #include <linux/mutex.h>
  37 #include <linux/delay.h>
  38
  39 /* Addresses to scan */
  40 static const unsigned short normal_i2c[] = {
  41         0x2c, 0x2d, 0x2e, 0x2f, I2C_CLIENT_END
  42 };
  43
  44
  45 static int reset;
  46 module_param(reset, bool, 0);
  47 MODULE_PARM_DESC(reset, "Set to 1 to reset chip, not recommended");
  48
  49
  50 #define W83795_REG_BANKSEL              0x00
  51 #define W83795_REG_VENDORID             0xfd
  52 #define W83795_REG_CHIPID               0xfe
  53 #define W83795_REG_DEVICEID             0xfb
  54 #define W83795_REG_DEVICEID_A           0xff
  55
  56 #define W83795_REG_I2C_ADDR             0xfc
  57 #define W83795_REG_CONFIG               0x01
  58 #define W83795_REG_CONFIG_CONFIG48      0x04
  59 #define W83795_REG_CONFIG_START 0x01
  60
  61 /* Multi-Function Pin Ctrl Registers */
  62 #define W83795_REG_VOLT_CTRL1           0x02
  63 #define W83795_REG_VOLT_CTRL2           0x03
  64 #define W83795_REG_TEMP_CTRL1           0x04
  65 #define W83795_REG_TEMP_CTRL2           0x05
  66 #define W83795_REG_FANIN_CTRL1          0x06
  67 #define W83795_REG_FANIN_CTRL2          0x07
  68 #define W83795_REG_VMIGB_CTRL           0x08
  69
  70 #define TEMP_READ                       0
  71 #define TEMP_CRIT                       1
  72 #define TEMP_CRIT_HYST                  2
  73 #define TEMP_WARN                       3
  74 #define TEMP_WARN_HYST                  4
  75 /* only crit and crit_hyst affect real-time alarm status
  76  * current crit crit_hyst warn warn_hyst */
  77 static const u16 W83795_REG_TEMP[][5] = {
  78         {0x21, 0x96, 0x97, 0x98, 0x99}, /* TD1/TR1 */
  79         {0x22, 0x9a, 0x9b, 0x9c, 0x9d}, /* TD2/TR2 */
  80         {0x23, 0x9e, 0x9f, 0xa0, 0xa1}, /* TD3/TR3 */
  81         {0x24, 0xa2, 0xa3, 0xa4, 0xa5}, /* TD4/TR4 */
  82         {0x1f, 0xa6, 0xa7, 0xa8, 0xa9}, /* TR5 */
  83         {0x20, 0xaa, 0xab, 0xac, 0xad}, /* TR6 */
  84 };
  85
  86 #define IN_READ                         0
  87 #define IN_MAX                          1
  88 #define IN_LOW                          2
  89 static const u16 W83795_REG_IN[][3] = {
  90         /* Current, HL, LL */
  91         {0x10, 0x70, 0x71},     /* VSEN1 */
  92         {0x11, 0x72, 0x73},     /* VSEN2 */
  93         {0x12, 0x74, 0x75},     /* VSEN3 */
  94         {0x13, 0x76, 0x77},     /* VSEN4 */
  95         {0x14, 0x78, 0x79},     /* VSEN5 */
  96         {0x15, 0x7a, 0x7b},     /* VSEN6 */
  97         {0x16, 0x7c, 0x7d},     /* VSEN7 */
  98         {0x17, 0x7e, 0x7f},     /* VSEN8 */
  99         {0x18, 0x80, 0x81},     /* VSEN9 */
 100         {0x19, 0x82, 0x83},     /* VSEN10 */
 101         {0x1A, 0x84, 0x85},     /* VSEN11 */
 102         {0x1B, 0x86, 0x87},     /* VTT */
 103         {0x1C, 0x88, 0x89},     /* 3VDD */
 104         {0x1D, 0x8a, 0x8b},     /* 3VSB */
 105         {0x1E, 0x8c, 0x8d},     /* VBAT */
 106         {0x1F, 0xa6, 0xa7},     /* VSEN12 */
 107         {0x20, 0xaa, 0xab},     /* VSEN13 */
 108         {0x21, 0x96, 0x97},     /* VSEN14 */
 109         {0x22, 0x9a, 0x9b},     /* VSEN15 */
 110         {0x23, 0x9e, 0x9f},     /* VSEN16 */
 111         {0x24, 0xa2, 0xa3},     /* VSEN17 */
 112 };
 113 #define W83795_REG_VRLSB                0x3C
 114
 115 static const u8 W83795_REG_IN_HL_LSB[] = {
 116         0x8e,   /* VSEN1-4 */
 117         0x90,   /* VSEN5-8 */
 118         0x92,   /* VSEN9-11 */
 119         0x94,   /* VTT, 3VDD, 3VSB, 3VBAT */
 120         0xa8,   /* VSEN12 */
 121         0xac,   /* VSEN13 */
 122         0x98,   /* VSEN14 */
 123         0x9c,   /* VSEN15 */
 124         0xa0,   /* VSEN16 */
 125         0xa4,   /* VSEN17 */
 126 };
 127
 128 #define IN_LSB_REG(index, type) \
 129         (((type) == 1) ? W83795_REG_IN_HL_LSB[(index)] \
 130         : (W83795_REG_IN_HL_LSB[(index)] + 1))
 131
 132 #define IN_LSB_SHIFT                    0
 133 #define IN_LSB_IDX                      1
 134 static const u8 IN_LSB_SHIFT_IDX[][2] = {
 135         /* High/Low LSB shift, LSB No. */
 136         {0x00, 0x00},   /* VSEN1 */
 137         {0x02, 0x00},   /* VSEN2 */
 138         {0x04, 0x00},   /* VSEN3 */
 139         {0x06, 0x00},   /* VSEN4 */
 140         {0x00, 0x01},   /* VSEN5 */
 141         {0x02, 0x01},   /* VSEN6 */
 142         {0x04, 0x01},   /* VSEN7 */
 143         {0x06, 0x01},   /* VSEN8 */
 144         {0x00, 0x02},   /* VSEN9 */
 145         {0x02, 0x02},   /* VSEN10 */
 146         {0x04, 0x02},   /* VSEN11 */
 147         {0x00, 0x03},   /* VTT */
 148         {0x02, 0x03},   /* 3VDD */
 149         {0x04, 0x03},   /* 3VSB */
 150         {0x06, 0x03},   /* VBAT */
 151         {0x06, 0x04},   /* VSEN12 */
 152         {0x06, 0x05},   /* VSEN13 */
 153         {0x06, 0x06},   /* VSEN14 */
 154         {0x06, 0x07},   /* VSEN15 */
 155         {0x06, 0x08},   /* VSEN16 */
 156         {0x06, 0x09},   /* VSEN17 */
 157 };
 158
 159
 160 #define W83795_REG_FAN(index)           (0x2E + (index))
 161 #define W83795_REG_FAN_MIN_HL(index)    (0xB6 + (index))
 162 #define W83795_REG_FAN_MIN_LSB(index)   (0xC4 + (index) / 2)
 163 #define W83795_REG_FAN_MIN_LSB_SHIFT(index) \
 164         (((index) & 1) ? 4 : 0)
 165
 166 #define W83795_REG_VID_CTRL             0x6A
 167
 168 #define W83795_REG_ALARM(index)         (0x41 + (index))
 169 #define W83795_REG_BEEP(index)          (0x50 + (index))
 170
 171 #define W83795_REG_CLR_CHASSIS          0x4D
 172
 173
 174 #define W83795_REG_FCMS1                0x201
 175 #define W83795_REG_FCMS2                0x208
 176 #define W83795_REG_TFMR(index)          (0x202 + (index))
 177 #define W83795_REG_FOMC                 0x20F
 178
 179 #define W83795_REG_TSS(index)           (0x209 + (index))
 180
 181 #define PWM_OUTPUT                      0
 182 #define PWM_FREQ                        1
 183 #define PWM_START                       2
 184 #define PWM_NONSTOP                     3
 185 #define PWM_STOP_TIME                   4
 186 #define W83795_REG_PWM(index, nr)       (0x210 + (nr) * 8 + (index))
 187
 188 #define W83795_REG_FTSH(index)          (0x240 + (index) * 2)
 189 #define W83795_REG_FTSL(index)          (0x241 + (index) * 2)
 190 #define W83795_REG_TFTS                 0x250
 191
 192 #define TEMP_PWM_TTTI                   0
 193 #define TEMP_PWM_CTFS                   1
 194 #define TEMP_PWM_HCT                    2
 195 #define TEMP_PWM_HOT                    3
 196 #define W83795_REG_TTTI(index)          (0x260 + (index))
 197 #define W83795_REG_CTFS(index)          (0x268 + (index))
 198 #define W83795_REG_HT(index)            (0x270 + (index))
 199
 200 #define SF4_TEMP                        0
 201 #define SF4_PWM                         1
 202 #define W83795_REG_SF4_TEMP(temp_num, index) \
 203         (0x280 + 0x10 * (temp_num) + (index))
 204 #define W83795_REG_SF4_PWM(temp_num, index) \
 205         (0x288 + 0x10 * (temp_num) + (index))
 206
 207 #define W83795_REG_DTSC                 0x301
 208 #define W83795_REG_DTSE                 0x302
 209 #define W83795_REG_DTS(index)           (0x26 + (index))
 210 #define W83795_REG_PECI_TBASE(index)    (0x320 + (index))
 211
 212 #define DTS_CRIT                        0
 213 #define DTS_CRIT_HYST                   1
 214 #define DTS_WARN                        2
 215 #define DTS_WARN_HYST                   3
 216 #define W83795_REG_DTS_EXT(index)       (0xB2 + (index))
 217
 218 #define SETUP_PWM_DEFAULT               0
 219 #define SETUP_PWM_UPTIME                1
 220 #define SETUP_PWM_DOWNTIME              2
 221 #define W83795_REG_SETUP_PWM(index)    (0x20C + (index))
 222
 223 static inline u16 in_from_reg(u8 index, u16 val)
 224 {
 225         /* 3VDD, 3VSB and VBAT: 6 mV/bit; other inputs: 2 mV/bit */
 226         if (index >= 12 && index <= 14)
 227                 return val * 6;
 228         else
 229                 return val * 2;
 230 }
 231
 232 static inline u16 in_to_reg(u8 index, u16 val)
 233 {
 234         if (index >= 12 && index <= 14)
 235                 return val / 6;
 236         else
 237                 return val / 2;
 238 }
 239
 240 static inline unsigned long fan_from_reg(u16 val)
 241 {
 242         if ((val == 0xfff) || (val == 0))
 243                 return 0;
 244         return 1350000UL / val;
 245 }
 246
 247 static inline u16 fan_to_reg(long rpm)
 248 {
 249         if (rpm <= 0)
 250                 return 0x0fff;
 251         return SENSORS_LIMIT((1350000 + (rpm >> 1)) / rpm, 1, 0xffe);
 252 }
 253
 254 static inline unsigned long time_from_reg(u8 reg)
 255 {
 256         return reg * 100;
 257 }
 258
 259 static inline u8 time_to_reg(unsigned long val)
 260 {
 261         return SENSORS_LIMIT((val + 50) / 100, 0, 0xff);
 262 }
 263
 264 static inline long temp_from_reg(s8 reg)
 265 {
 266         return reg * 1000;
 267 }
 268
 269 static inline s8 temp_to_reg(long val, s8 min, s8 max)
 270 {
 271         return SENSORS_LIMIT(val / 1000, min, max);
 272 }
 273
 274 static const u16 pwm_freq_cksel0[16] = {
 275         1024, 512, 341, 256, 205, 171, 146, 128,
 276         85, 64, 32, 16, 8, 4, 2, 1
 277 };
 278
 279 static unsigned int pwm_freq_from_reg(u8 reg, u16 clkin)
 280 {
 281         unsigned long base_clock;
 282
 283         if (reg & 0x80) {
 284                 base_clock = clkin * 1000 / ((clkin == 48000) ? 384 : 256);
 285                 return base_clock / ((reg & 0x7f) + 1);
 286         } else
 287                 return pwm_freq_cksel0[reg & 0x0f];
 288 }
 289
 290 static u8 pwm_freq_to_reg(unsigned long val, u16 clkin)
 291 {
 292         unsigned long base_clock;
 293         u8 reg0, reg1;
 294         unsigned long best0, best1;
 295
 296         /* Best fit for cksel = 0 */
 297         for (reg0 = 0; reg0 < ARRAY_SIZE(pwm_freq_cksel0) - 1; reg0++) {
 298                 if (val > (pwm_freq_cksel0[reg0] +
 299                            pwm_freq_cksel0[reg0 + 1]) / 2)
 300                         break;
 301         }
 302         if (val < 375)  /* cksel = 1 can't beat this */
 303                 return reg0;
 304         best0 = pwm_freq_cksel0[reg0];
 305
 306         /* Best fit for cksel = 1 */
 307         base_clock = clkin * 1000 / ((clkin == 48000) ? 384 : 256);
 308         reg1 = SENSORS_LIMIT(DIV_ROUND_CLOSEST(base_clock, val), 1, 128);
 309         best1 = base_clock / reg1;
 310         reg1 = 0x80 | (reg1 - 1);
 311
 312         /* Choose the closest one */
 313         if (abs(val - best0) > abs(val - best1))
 314                 return reg1;
 315         else
 316                 return reg0;
 317 }
 318
 319 enum chip_types {w83795g, w83795adg};
 320
 321 struct w83795_data {
 322         struct device *hwmon_dev;
 323         struct mutex update_lock;
 324         unsigned long last_updated;     /* In jiffies */
 325         enum chip_types chip_type;
 326
 327         u8 bank;
 328
 329         u32 has_in;             /* Enable monitor VIN or not */
 330         u8 has_dyn_in;          /* Only in2-0 can have this */
 331         u16 in[21][3];          /* Register value, read/high/low */
 332         u8 in_lsb[10][3];       /* LSB Register value, high/low */
 333         u8 has_gain;            /* has gain: in17-20 * 8 */
 334
 335         u16 has_fan;            /* Enable fan14-1 or not */
 336         u16 fan[14];            /* Register value combine */
 337         u16 fan_min[14];        /* Register value combine */
 338
 339         u8 has_temp;            /* Enable monitor temp6-1 or not */
 340         s8 temp[6][5];          /* current, crit, crit_hyst, warn, warn_hyst */
 341         u8 temp_read_vrlsb[6];
 342         u8 temp_mode;           /* Bit vector, 0 = TR, 1 = TD */
 343         u8 temp_src[3];         /* Register value */
 344
 345         u8 enable_dts;          /* Enable PECI and SB-TSI,
 346                                  * bit 0: =1 enable, =0 disable,
 347                                  * bit 1: =1 AMD SB-TSI, =0 Intel PECI */
 348         u8 has_dts;             /* Enable monitor DTS temp */
 349         s8 dts[8];              /* Register value */
 350         u8 dts_read_vrlsb[8];   /* Register value */
 351         s8 dts_ext[4];          /* Register value */
 352
 353         u8 has_pwm;             /* 795g supports 8 pwm, 795adg only supports 2,
 354                                  * no config register, only affected by chip
 355                                  * type */
 356         u8 pwm[8][5];           /* Register value, output, freq, start,
 357                                  *  non stop, stop time */
 358         u16 clkin;              /* CLKIN frequency in kHz */
 359         u8 pwm_fcms[2];         /* Register value */
 360         u8 pwm_tfmr[6];         /* Register value */
 361         u8 pwm_fomc;            /* Register value */
 362
 363         u16 target_speed[8];    /* Register value, target speed for speed
 364                                  * cruise */
 365         u8 tol_speed;           /* tolerance of target speed */
 366         u8 pwm_temp[6][4];      /* TTTI, CTFS, HCT, HOT */
 367         u8 sf4_reg[6][2][7];    /* 6 temp, temp/dcpwm, 7 registers */
 368
 369         u8 setup_pwm[3];        /* Register value */
 370
 371         u8 alarms[6];           /* Register value */
 372         u8 beeps[6];            /* Register value */
 373
 374         char valid;
 375         char valid_limits;
 376         char valid_pwm_config;
 377 };
 378
 379 /*
 380  * Hardware access
 381  * We assume that nobdody can change the bank outside the driver.
 382  */
 383
 384 /* Must be called with data->update_lock held, except during initialization */
 385 static int w83795_set_bank(struct i2c_client *client, u8 bank)
 386 {
 387         struct w83795_data *data = i2c_get_clientdata(client);
 388         int err;
 389
 390         /* If the same bank is already set, nothing to do */
 391         if ((data->bank & 0x07) == bank)
 392                 return 0;
 393
 394         /* Change to new bank, preserve all other bits */
 395         bank |= data->bank & ~0x07;
 396         err = i2c_smbus_write_byte_data(client, W83795_REG_BANKSEL, bank);
 397         if (err < 0) {
 398                 dev_err(&client->dev,
 399                         "Failed to set bank to %d, err %d\n",
 400                         (int)bank, err);
 401                 return err;
 402         }
 403         data->bank = bank;
 404
 405         return 0;
 406 }
 407
 408 /* Must be called with data->update_lock held, except during initialization */
 409 static u8 w83795_read(struct i2c_client *client, u16 reg)
 410 {
 411         int err;
 412
 413         err = w83795_set_bank(client, reg >> 8);
 414         if (err < 0)
 415                 return 0x00;    /* Arbitrary */
 416
 417         err = i2c_smbus_read_byte_data(client, reg & 0xff);
 418         if (err < 0) {
 419                 dev_err(&client->dev,
 420                         "Failed to read from register 0x%03x, err %d\n",
 421                         (int)reg, err);
 422                 return 0x00;    /* Arbitrary */
 423         }
 424         return err;
 425 }
 426
 427 /* Must be called with data->update_lock held, except during initialization */
 428 static int w83795_write(struct i2c_client *client, u16 reg, u8 value)
 429 {
 430         int err;
 431
 432         err = w83795_set_bank(client, reg >> 8);
 433         if (err < 0)
 434                 return err;
 435
 436         err = i2c_smbus_write_byte_data(client, reg & 0xff, value);
 437         if (err < 0)
 438                 dev_err(&client->dev,
 439                         "Failed to write to register 0x%03x, err %d\n",
 440                         (int)reg, err);
 441         return err;
 442 }
 443
 444 static void w83795_update_limits(struct i2c_client *client)
 445 {
 446         struct w83795_data *data = i2c_get_clientdata(client);
 447         int i, limit;
 448
 449         /* Read the voltage limits */
 450         for (i = 0; i < ARRAY_SIZE(data->in); i++) {
 451                 if (!(data->has_in & (1 << i)))
 452                         continue;
 453                 data->in[i][IN_MAX] =
 454                         w83795_read(client, W83795_REG_IN[i][IN_MAX]);
 455                 data->in[i][IN_LOW] =
 456                         w83795_read(client, W83795_REG_IN[i][IN_LOW]);
 457         }
 458         for (i = 0; i < ARRAY_SIZE(data->in_lsb); i++) {
 459                 if ((i == 2 && data->chip_type == w83795adg) ||
 460                     (i >= 4 && !(data->has_in & (1 << (i + 11)))))
 461                         continue;
 462                 data->in_lsb[i][IN_MAX] =
 463                         w83795_read(client, IN_LSB_REG(i, IN_MAX));
 464                 data->in_lsb[i][IN_LOW] =
 465                         w83795_read(client, IN_LSB_REG(i, IN_LOW));
 466         }
 467
 468         /* Read the fan limits */
 469         for (i = 0; i < ARRAY_SIZE(data->fan); i++) {
 470                 u8 lsb;
 471
 472                 /* Each register contains LSB for 2 fans, but we want to
 473                  * read it only once to save time */
 474                 if ((i & 1) == 0 && (data->has_fan & (3 << i)))
 475                         lsb = w83795_read(client, W83795_REG_FAN_MIN_LSB(i));
 476
 477                 if (!(data->has_fan & (1 << i)))
 478                         continue;
 479                 data->fan_min[i] =
 480                         w83795_read(client, W83795_REG_FAN_MIN_HL(i)) << 4;
 481                 data->fan_min[i] |=
 482                         (lsb >> W83795_REG_FAN_MIN_LSB_SHIFT(i)) & 0x0F;
 483         }
 484
 485         /* Read the temperature limits */
 486         for (i = 0; i < ARRAY_SIZE(data->temp); i++) {
 487                 if (!(data->has_temp & (1 << i)))
 488                         continue;
 489                 for (limit = TEMP_CRIT; limit <= TEMP_WARN_HYST; limit++)
 490                         data->temp[i][limit] =
 491                                 w83795_read(client, W83795_REG_TEMP[i][limit]);
 492         }
 493
 494         /* Read the DTS limits */
 495         if (data->enable_dts) {
 496                 for (limit = DTS_CRIT; limit <= DTS_WARN_HYST; limit++)
 497                         data->dts_ext[limit] =
 498                                 w83795_read(client, W83795_REG_DTS_EXT(limit));
 499         }
 500
 501         /* Read beep settings */
 502         for (i = 0; i < ARRAY_SIZE(data->beeps); i++)
 503                 data->beeps[i] = w83795_read(client, W83795_REG_BEEP(i));
 504
 505         data->valid_limits = 1;
 506 }
 507
 508 static struct w83795_data *w83795_update_pwm_config(struct device *dev)
 509 {
 510         struct i2c_client *client = to_i2c_client(dev);
 511         struct w83795_data *data = i2c_get_clientdata(client);
 512         int i, tmp;
 513
 514         mutex_lock(&data->update_lock);
 515
 516         if (data->valid_pwm_config)
 517                 goto END;
 518
 519         /* Read temperature source selection */
 520         for (i = 0; i < ARRAY_SIZE(data->temp_src); i++)
 521                 data->temp_src[i] = w83795_read(client, W83795_REG_TSS(i));
 522
 523         /* Read automatic fan speed control settings */
 524         data->pwm_fcms[0] = w83795_read(client, W83795_REG_FCMS1);
 525         data->pwm_fcms[1] = w83795_read(client, W83795_REG_FCMS2);
 526         for (i = 0; i < ARRAY_SIZE(data->pwm_tfmr); i++)
 527                 data->pwm_tfmr[i] = w83795_read(client, W83795_REG_TFMR(i));
 528         data->pwm_fomc = w83795_read(client, W83795_REG_FOMC);
 529         for (i = 0; i < data->has_pwm; i++) {
 530                 for (tmp = PWM_FREQ; tmp <= PWM_STOP_TIME; tmp++)
 531                         data->pwm[i][tmp] =
 532                                 w83795_read(client, W83795_REG_PWM(i, tmp));
 533         }
 534         for (i = 0; i < ARRAY_SIZE(data->target_speed); i++) {
 535                 data->target_speed[i] =
 536                         w83795_read(client, W83795_REG_FTSH(i)) << 4;
 537                 data->target_speed[i] |=
 538                         w83795_read(client, W83795_REG_FTSL(i)) >> 4;
 539         }
 540         data->tol_speed = w83795_read(client, W83795_REG_TFTS) & 0x3f;
 541
 542         for (i = 0; i < ARRAY_SIZE(data->pwm_temp); i++) {
 543                 data->pwm_temp[i][TEMP_PWM_TTTI] =
 544                         w83795_read(client, W83795_REG_TTTI(i)) & 0x7f;
 545                 data->pwm_temp[i][TEMP_PWM_CTFS] =
 546                         w83795_read(client, W83795_REG_CTFS(i));
 547                 tmp = w83795_read(client, W83795_REG_HT(i));
 548                 data->pwm_temp[i][TEMP_PWM_HCT] = tmp >> 4;
 549                 data->pwm_temp[i][TEMP_PWM_HOT] = tmp & 0x0f;
 550         }
 551
 552         /* Read SmartFanIV trip points */
 553         for (i = 0; i < ARRAY_SIZE(data->sf4_reg); i++) {
 554                 for (tmp = 0; tmp < 7; tmp++) {
 555                         data->sf4_reg[i][SF4_TEMP][tmp] =
 556                                 w83795_read(client,
 557                                             W83795_REG_SF4_TEMP(i, tmp));
 558                         data->sf4_reg[i][SF4_PWM][tmp] =
 559                                 w83795_read(client, W83795_REG_SF4_PWM(i, tmp));
 560                 }
 561         }
 562
 563         /* Read setup PWM */
 564         for (i = 0; i < ARRAY_SIZE(data->setup_pwm); i++)
 565                 data->setup_pwm[i] =
 566                         w83795_read(client, W83795_REG_SETUP_PWM(i));
 567
 568         data->valid_pwm_config = 1;
 569
 570 END:
 571         mutex_unlock(&data->update_lock);
 572         return data;
 573 }
 574
 575 static struct w83795_data *w83795_update_device(struct device *dev)
 576 {
 577         struct i2c_client *client = to_i2c_client(dev);
 578         struct w83795_data *data = i2c_get_clientdata(client);
 579         u16 tmp;
 580         int i;
 581
 582         mutex_lock(&data->update_lock);
 583
 584         if (!data->valid_limits)
 585                 w83795_update_limits(client);
 586
 587         if (!(time_after(jiffies, data->last_updated + HZ * 2)
 588               || !data->valid))
 589                 goto END;
 590
 591         /* Update the voltages value */
 592         for (i = 0; i < ARRAY_SIZE(data->in); i++) {
 593                 if (!(data->has_in & (1 << i)))
 594                         continue;
 595                 tmp = w83795_read(client, W83795_REG_IN[i][IN_READ]) << 2;
 596                 tmp |= w83795_read(client, W83795_REG_VRLSB) >> 6;
 597                 data->in[i][IN_READ] = tmp;
 598         }
 599
 600         /* in0-2 can have dynamic limits (W83795G only) */
 601         if (data->has_dyn_in) {
 602                 u8 lsb_max = w83795_read(client, IN_LSB_REG(0, IN_MAX));
 603                 u8 lsb_low = w83795_read(client, IN_LSB_REG(0, IN_LOW));
 604
 605                 for (i = 0; i < 3; i++) {
 606                         if (!(data->has_dyn_in & (1 << i)))
 607                                 continue;
 608                         data->in[i][IN_MAX] =
 609                                 w83795_read(client, W83795_REG_IN[i][IN_MAX]);
 610                         data->in[i][IN_LOW] =
 611                                 w83795_read(client, W83795_REG_IN[i][IN_LOW]);
 612                         data->in_lsb[i][IN_MAX] = (lsb_max >> (2 * i)) & 0x03;
 613                         data->in_lsb[i][IN_LOW] = (lsb_low >> (2 * i)) & 0x03;
 614                 }
 615         }
 616
 617         /* Update fan */
 618         for (i = 0; i < ARRAY_SIZE(data->fan); i++) {
 619                 if (!(data->has_fan & (1 << i)))
 620                         continue;
 621                 data->fan[i] = w83795_read(client, W83795_REG_FAN(i)) << 4;
 622                 data->fan[i] |= w83795_read(client, W83795_REG_VRLSB) >> 4;
 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) {
 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 (nr == ALARM_STATUS)
 681                 val = (data->alarms[index] >> bit) & 1;
 682         else            /* BEEP_ENABLE */
 683                 val = (data->beeps[index] >> bit) & 1;
 684
 685         return sprintf(buf, "%u\n", val);
 686 }
 687
 688 static ssize_t
 689 store_beep(struct device *dev, struct device_attribute *attr,
 690            const char *buf, size_t count)
 691 {
 692         struct i2c_client *client = to_i2c_client(dev);
 693         struct w83795_data *data = i2c_get_clientdata(client);
 694         struct sensor_device_attribute_2 *sensor_attr =
 695             to_sensor_dev_attr_2(attr);
 696         int index = sensor_attr->index >> 3;
 697         int shift = sensor_attr->index & 0x07;
 698         u8 beep_bit = 1 << shift;
 699         unsigned long val;
 700
 701         if (strict_strtoul(buf, 10, &val) < 0)
 702                 return -EINVAL;
 703         if (val != 0 && val != 1)
 704                 return -EINVAL;
 705
 706         mutex_lock(&data->update_lock);
 707         data->beeps[index] = w83795_read(client, W83795_REG_BEEP(index));
 708         data->beeps[index] &= ~beep_bit;
 709         data->beeps[index] |= val << shift;
 710         w83795_write(client, W83795_REG_BEEP(index), data->beeps[index]);
 711         mutex_unlock(&data->update_lock);
 712
 713         return count;
 714 }
 715
 716 /* Write any value to clear chassis alarm */
 717 static ssize_t
 718 store_chassis_clear(struct device *dev,
 719                     struct device_attribute *attr, const char *buf,
 720                     size_t count)
 721 {
 722         struct i2c_client *client = to_i2c_client(dev);
 723         struct w83795_data *data = i2c_get_clientdata(client);
 724         u8 val;
 725
 726         mutex_lock(&data->update_lock);
 727         val = w83795_read(client, W83795_REG_CLR_CHASSIS);
 728         val |= 0x80;
 729         w83795_write(client, W83795_REG_CLR_CHASSIS, val);
 730         mutex_unlock(&data->update_lock);
 731         return count;
 732 }
 733
 734 #define FAN_INPUT     0
 735 #define FAN_MIN       1
 736 static ssize_t
 737 show_fan(struct device *dev, struct device_attribute *attr, char *buf)
 738 {
 739         struct sensor_device_attribute_2 *sensor_attr =
 740             to_sensor_dev_attr_2(attr);
 741         int nr = sensor_attr->nr;
 742         int index = sensor_attr->index;
 743         struct w83795_data *data = w83795_update_device(dev);
 744         u16 val;
 745
 746         if (nr == FAN_INPUT)
 747                 val = data->fan[index] & 0x0fff;
 748         else
 749                 val = data->fan_min[index] & 0x0fff;
 750
 751         return sprintf(buf, "%lu\n", fan_from_reg(val));
 752 }
 753
 754 static ssize_t
 755 store_fan_min(struct device *dev, struct device_attribute *attr,
 756               const char *buf, size_t count)
 757 {
 758         struct sensor_device_attribute_2 *sensor_attr =
 759             to_sensor_dev_attr_2(attr);
 760         int index = sensor_attr->index;
 761         struct i2c_client *client = to_i2c_client(dev);
 762         struct w83795_data *data = i2c_get_clientdata(client);
 763         unsigned long val;
 764
 765         if (strict_strtoul(buf, 10, &val))
 766                 return -EINVAL;
 767         val = fan_to_reg(val);
 768
 769         mutex_lock(&data->update_lock);
 770         data->fan_min[index] = val;
 771         w83795_write(client, W83795_REG_FAN_MIN_HL(index), (val >> 4) & 0xff);
 772         val &= 0x0f;
 773         if (index & 1) {
 774                 val <<= 4;
 775                 val |= w83795_read(client, W83795_REG_FAN_MIN_LSB(index))
 776                        & 0x0f;
 777         } else {
 778                 val |= w83795_read(client, W83795_REG_FAN_MIN_LSB(index))
 779                        & 0xf0;
 780         }
 781         w83795_write(client, W83795_REG_FAN_MIN_LSB(index), val & 0xff);
 782         mutex_unlock(&data->update_lock);
 783
 784         return count;
 785 }
 786
 787 static ssize_t
 788 show_pwm(struct device *dev, struct device_attribute *attr, char *buf)
 789 {
 790         struct w83795_data *data;
 791         struct sensor_device_attribute_2 *sensor_attr =
 792             to_sensor_dev_attr_2(attr);
 793         int nr = sensor_attr->nr;
 794         int index = sensor_attr->index;
 795         unsigned int val;
 796
 797         data = nr == PWM_OUTPUT ? w83795_update_device(dev)
 798                                 : w83795_update_pwm_config(dev);
 799
 800         switch (nr) {
 801         case PWM_STOP_TIME:
 802                 val = time_from_reg(data->pwm[index][nr]);
 803                 break;
 804         case PWM_FREQ:
 805                 val = pwm_freq_from_reg(data->pwm[index][nr], data->clkin);
 806                 break;
 807         default:
 808                 val = data->pwm[index][nr];
 809                 break;
 810         }
 811
 812         return sprintf(buf, "%u\n", val);
 813 }
 814
 815 static ssize_t
 816 store_pwm(struct device *dev, struct device_attribute *attr,
 817           const char *buf, size_t count)
 818 {
 819         struct i2c_client *client = to_i2c_client(dev);
 820         struct w83795_data *data = i2c_get_clientdata(client);
 821         struct sensor_device_attribute_2 *sensor_attr =
 822             to_sensor_dev_attr_2(attr);
 823         int nr = sensor_attr->nr;
 824         int index = sensor_attr->index;
 825         unsigned long val;
 826
 827         if (strict_strtoul(buf, 10, &val) < 0)
 828                 return -EINVAL;
 829
 830         mutex_lock(&data->update_lock);
 831         switch (nr) {
 832         case PWM_STOP_TIME:
 833                 val = time_to_reg(val);
 834                 break;
 835         case PWM_FREQ:
 836                 val = pwm_freq_to_reg(val, data->clkin);
 837                 break;
 838         default:
 839                 val = SENSORS_LIMIT(val, 0, 0xff);
 840                 break;
 841         }
 842         w83795_write(client, W83795_REG_PWM(index, nr), val);
 843         data->pwm[index][nr] = val;
 844         mutex_unlock(&data->update_lock);
 845         return count;
 846 }
 847
 848 static ssize_t
 849 show_pwm_enable(struct device *dev, struct device_attribute *attr, char *buf)
 850 {
 851         struct sensor_device_attribute_2 *sensor_attr =
 852             to_sensor_dev_attr_2(attr);
 853         struct w83795_data *data = w83795_update_pwm_config(dev);
 854         int index = sensor_attr->index;
 855         u8 tmp;
 856
 857         if (1 == (data->pwm_fcms[0] & (1 << index))) {
 858                 tmp = 2;
 859                 goto out;
 860         }
 861         for (tmp = 0; tmp < 6; tmp++) {
 862                 if (data->pwm_tfmr[tmp] & (1 << index)) {
 863                         tmp = 3;
 864                         goto out;
 865                 }
 866         }
 867         if (data->pwm_fomc & (1 << index))
 868                 tmp = 0;
 869         else
 870                 tmp = 1;
 871
 872 out:
 873         return sprintf(buf, "%u\n", tmp);
 874 }
 875
 876 static ssize_t
 877 store_pwm_enable(struct device *dev, struct device_attribute *attr,
 878           const char *buf, size_t count)
 879 {
 880         struct i2c_client *client = to_i2c_client(dev);
 881         struct w83795_data *data = w83795_update_pwm_config(dev);
 882         struct sensor_device_attribute_2 *sensor_attr =
 883             to_sensor_dev_attr_2(attr);
 884         int index = sensor_attr->index;
 885         unsigned long val;
 886         int i;
 887
 888         if (strict_strtoul(buf, 10, &val) < 0)
 889                 return -EINVAL;
 890         if (val > 2)
 891                 return -EINVAL;
 892
 893         mutex_lock(&data->update_lock);
 894         switch (val) {
 895         case 0:
 896         case 1:
 897                 data->pwm_fcms[0] &= ~(1 << index);
 898                 w83795_write(client, W83795_REG_FCMS1, data->pwm_fcms[0]);
 899                 for (i = 0; i < 6; i++) {
 900                         data->pwm_tfmr[i] &= ~(1 << index);
 901                         w83795_write(client, W83795_REG_TFMR(i),
 902                                 data->pwm_tfmr[i]);
 903                 }
 904                 data->pwm_fomc |= 1 << index;
 905                 data->pwm_fomc ^= val << index;
 906                 w83795_write(client, W83795_REG_FOMC, data->pwm_fomc);
 907                 break;
 908         case 2:
 909                 data->pwm_fcms[0] |= (1 << index);
 910                 w83795_write(client, W83795_REG_FCMS1, data->pwm_fcms[0]);
 911                 break;
 912         }
 913         mutex_unlock(&data->update_lock);
 914         return count;
 915 }
 916
 917 static ssize_t
 918 show_temp_src(struct device *dev, struct device_attribute *attr, char *buf)
 919 {
 920         struct sensor_device_attribute_2 *sensor_attr =
 921             to_sensor_dev_attr_2(attr);
 922         struct w83795_data *data = w83795_update_pwm_config(dev);
 923         int index = sensor_attr->index;
 924         u8 val = index / 2;
 925         u8 tmp = data->temp_src[val];
 926
 927         if (index & 1)
 928                 val = 4;
 929         else
 930                 val = 0;
 931         tmp >>= val;
 932         tmp &= 0x0f;
 933
 934         return sprintf(buf, "%u\n", tmp);
 935 }
 936
 937 static ssize_t
 938 store_temp_src(struct device *dev, struct device_attribute *attr,
 939           const char *buf, size_t count)
 940 {
 941         struct i2c_client *client = to_i2c_client(dev);
 942         struct w83795_data *data = w83795_update_pwm_config(dev);
 943         struct sensor_device_attribute_2 *sensor_attr =
 944             to_sensor_dev_attr_2(attr);
 945         int index = sensor_attr->index;
 946         unsigned long tmp;
 947         u8 val = index / 2;
 948
 949         if (strict_strtoul(buf, 10, &tmp) < 0)
 950                 return -EINVAL;
 951         tmp = SENSORS_LIMIT(tmp, 0, 15);
 952
 953         mutex_lock(&data->update_lock);
 954         if (index & 1) {
 955                 tmp <<= 4;
 956                 data->temp_src[val] &= 0x0f;
 957         } else {
 958                 data->temp_src[val] &= 0xf0;
 959         }
 960         data->temp_src[val] |= tmp;
 961         w83795_write(client, W83795_REG_TSS(val), data->temp_src[val]);
 962         mutex_unlock(&data->update_lock);
 963
 964         return count;
 965 }
 966
 967 #define TEMP_PWM_ENABLE   0
 968 #define TEMP_PWM_FAN_MAP  1
 969 static ssize_t
 970 show_temp_pwm_enable(struct device *dev, struct device_attribute *attr,
 971                      char *buf)
 972 {
 973         struct w83795_data *data = w83795_update_pwm_config(dev);
 974         struct sensor_device_attribute_2 *sensor_attr =
 975             to_sensor_dev_attr_2(attr);
 976         int nr = sensor_attr->nr;
 977         int index = sensor_attr->index;
 978         u8 tmp = 0xff;
 979
 980         switch (nr) {
 981         case TEMP_PWM_ENABLE:
 982                 tmp = (data->pwm_fcms[1] >> index) & 1;
 983                 if (tmp)
 984                         tmp = 4;
 985                 else
 986                         tmp = 3;
 987                 break;
 988         case TEMP_PWM_FAN_MAP:
 989                 tmp = data->pwm_tfmr[index];
 990                 break;
 991         }
 992
 993         return sprintf(buf, "%u\n", tmp);
 994 }
 995
 996 static ssize_t
 997 store_temp_pwm_enable(struct device *dev, struct device_attribute *attr,
 998           const char *buf, size_t count)
 999 {
1000         struct i2c_client *client = to_i2c_client(dev);
1001         struct w83795_data *data = w83795_update_pwm_config(dev);
1002         struct sensor_device_attribute_2 *sensor_attr =
1003             to_sensor_dev_attr_2(attr);
1004         int nr = sensor_attr->nr;
1005         int index = sensor_attr->index;
1006         unsigned long tmp;
1007
1008         if (strict_strtoul(buf, 10, &tmp) < 0)
1009                 return -EINVAL;
1010
1011         switch (nr) {
1012         case TEMP_PWM_ENABLE:
1013                 if (tmp != 3 && tmp != 4)
1014                         return -EINVAL;
1015                 tmp -= 3;
1016                 mutex_lock(&data->update_lock);
1017                 data->pwm_fcms[1] &= ~(1 << index);
1018                 data->pwm_fcms[1] |= tmp << index;
1019                 w83795_write(client, W83795_REG_FCMS2, data->pwm_fcms[1]);
1020                 mutex_unlock(&data->update_lock);
1021                 break;
1022         case TEMP_PWM_FAN_MAP:
1023                 mutex_lock(&data->update_lock);
1024                 tmp = SENSORS_LIMIT(tmp, 0, 0xff);
1025                 w83795_write(client, W83795_REG_TFMR(index), tmp);
1026                 data->pwm_tfmr[index] = tmp;
1027                 mutex_unlock(&data->update_lock);
1028                 break;
1029         }
1030         return count;
1031 }
1032
1033 #define FANIN_TARGET   0
1034 #define FANIN_TOL      1
1035 static ssize_t
1036 show_fanin(struct device *dev, struct device_attribute *attr, char *buf)
1037 {
1038         struct w83795_data *data = w83795_update_pwm_config(dev);
1039         struct sensor_device_attribute_2 *sensor_attr =
1040             to_sensor_dev_attr_2(attr);
1041         int nr = sensor_attr->nr;
1042         int index = sensor_attr->index;
1043         u16 tmp = 0;
1044
1045         switch (nr) {
1046         case FANIN_TARGET:
1047                 tmp = fan_from_reg(data->target_speed[index]);
1048                 break;
1049         case FANIN_TOL:
1050                 tmp = data->tol_speed;
1051                 break;
1052         }
1053
1054         return sprintf(buf, "%u\n", tmp);
1055 }
1056
1057 static ssize_t
1058 store_fanin(struct device *dev, struct device_attribute *attr,
1059           const char *buf, size_t count)
1060 {
1061         struct i2c_client *client = to_i2c_client(dev);
1062         struct w83795_data *data = i2c_get_clientdata(client);
1063         struct sensor_device_attribute_2 *sensor_attr =
1064             to_sensor_dev_attr_2(attr);
1065         int nr = sensor_attr->nr;
1066         int index = sensor_attr->index;
1067         unsigned long val;
1068
1069         if (strict_strtoul(buf, 10, &val) < 0)
1070                 return -EINVAL;
1071
1072         mutex_lock(&data->update_lock);
1073         switch (nr) {
1074         case FANIN_TARGET:
1075                 val = fan_to_reg(SENSORS_LIMIT(val, 0, 0xfff));
1076                 w83795_write(client, W83795_REG_FTSH(index), val >> 4);
1077                 w83795_write(client, W83795_REG_FTSL(index), (val << 4) & 0xf0);
1078                 data->target_speed[index] = val;
1079                 break;
1080         case FANIN_TOL:
1081                 val = SENSORS_LIMIT(val, 0, 0x3f);
1082                 w83795_write(client, W83795_REG_TFTS, val);
1083                 data->tol_speed = val;
1084                 break;
1085         }
1086         mutex_unlock(&data->update_lock);
1087
1088         return count;
1089 }
1090
1091
1092 static ssize_t
1093 show_temp_pwm(struct device *dev, struct device_attribute *attr, char *buf)
1094 {
1095         struct w83795_data *data = w83795_update_pwm_config(dev);
1096         struct sensor_device_attribute_2 *sensor_attr =
1097             to_sensor_dev_attr_2(attr);
1098         int nr = sensor_attr->nr;
1099         int index = sensor_attr->index;
1100         long tmp = temp_from_reg(data->pwm_temp[index][nr]);
1101
1102         return sprintf(buf, "%ld\n", tmp);
1103 }
1104
1105 static ssize_t
1106 store_temp_pwm(struct device *dev, struct device_attribute *attr,
1107           const char *buf, size_t count)
1108 {
1109         struct i2c_client *client = to_i2c_client(dev);
1110         struct w83795_data *data = i2c_get_clientdata(client);
1111         struct sensor_device_attribute_2 *sensor_attr =
1112             to_sensor_dev_attr_2(attr);
1113         int nr = sensor_attr->nr;
1114         int index = sensor_attr->index;
1115         unsigned long val;
1116         u8 tmp;
1117
1118         if (strict_strtoul(buf, 10, &val) < 0)
1119                 return -EINVAL;
1120         val /= 1000;
1121
1122         mutex_lock(&data->update_lock);
1123         switch (nr) {
1124         case TEMP_PWM_TTTI:
1125                 val = SENSORS_LIMIT(val, 0, 0x7f);
1126                 w83795_write(client, W83795_REG_TTTI(index), val);
1127                 break;
1128         case TEMP_PWM_CTFS:
1129                 val = SENSORS_LIMIT(val, 0, 0x7f);
1130                 w83795_write(client, W83795_REG_CTFS(index), val);
1131                 break;
1132         case TEMP_PWM_HCT:
1133                 val = SENSORS_LIMIT(val, 0, 0x0f);
1134                 tmp = w83795_read(client, W83795_REG_HT(index));
1135                 tmp &= 0x0f;
1136                 tmp |= (val << 4) & 0xf0;
1137                 w83795_write(client, W83795_REG_HT(index), tmp);
1138                 break;
1139         case TEMP_PWM_HOT:
1140                 val = SENSORS_LIMIT(val, 0, 0x0f);
1141                 tmp = w83795_read(client, W83795_REG_HT(index));
1142                 tmp &= 0xf0;
1143                 tmp |= val & 0x0f;
1144                 w83795_write(client, W83795_REG_HT(index), tmp);
1145                 break;
1146         }
1147         data->pwm_temp[index][nr] = val;
1148         mutex_unlock(&data->update_lock);
1149
1150         return count;
1151 }
1152
1153 static ssize_t
1154 show_sf4_pwm(struct device *dev, struct device_attribute *attr, char *buf)
1155 {
1156         struct w83795_data *data = w83795_update_pwm_config(dev);
1157         struct sensor_device_attribute_2 *sensor_attr =
1158             to_sensor_dev_attr_2(attr);
1159         int nr = sensor_attr->nr;
1160         int index = sensor_attr->index;
1161
1162         return sprintf(buf, "%u\n", data->sf4_reg[index][SF4_PWM][nr]);
1163 }
1164
1165 static ssize_t
1166 store_sf4_pwm(struct device *dev, struct device_attribute *attr,
1167           const char *buf, size_t count)
1168 {
1169         struct i2c_client *client = to_i2c_client(dev);
1170         struct w83795_data *data = i2c_get_clientdata(client);
1171         struct sensor_device_attribute_2 *sensor_attr =
1172             to_sensor_dev_attr_2(attr);
1173         int nr = sensor_attr->nr;
1174         int index = sensor_attr->index;
1175         unsigned long val;
1176
1177         if (strict_strtoul(buf, 10, &val) < 0)
1178                 return -EINVAL;
1179
1180         mutex_lock(&data->update_lock);
1181         w83795_write(client, W83795_REG_SF4_PWM(index, nr), val);
1182         data->sf4_reg[index][SF4_PWM][nr] = val;
1183         mutex_unlock(&data->update_lock);
1184
1185         return count;
1186 }
1187
1188 static ssize_t
1189 show_sf4_temp(struct device *dev, struct device_attribute *attr, char *buf)
1190 {
1191         struct w83795_data *data = w83795_update_pwm_config(dev);
1192         struct sensor_device_attribute_2 *sensor_attr =
1193             to_sensor_dev_attr_2(attr);
1194         int nr = sensor_attr->nr;
1195         int index = sensor_attr->index;
1196
1197         return sprintf(buf, "%u\n",
1198                 (data->sf4_reg[index][SF4_TEMP][nr]) * 1000);
1199 }
1200
1201 static ssize_t
1202 store_sf4_temp(struct device *dev, struct device_attribute *attr,
1203           const char *buf, size_t count)
1204 {
1205         struct i2c_client *client = to_i2c_client(dev);
1206         struct w83795_data *data = i2c_get_clientdata(client);
1207         struct sensor_device_attribute_2 *sensor_attr =
1208             to_sensor_dev_attr_2(attr);
1209         int nr = sensor_attr->nr;
1210         int index = sensor_attr->index;
1211         unsigned long val;
1212
1213         if (strict_strtoul(buf, 10, &val) < 0)
1214                 return -EINVAL;
1215         val /= 1000;
1216
1217         mutex_lock(&data->update_lock);
1218         w83795_write(client, W83795_REG_SF4_TEMP(index, nr), val);
1219         data->sf4_reg[index][SF4_TEMP][nr] = val;
1220         mutex_unlock(&data->update_lock);
1221
1222         return count;
1223 }
1224
1225
1226 static ssize_t
1227 show_temp(struct device *dev, struct device_attribute *attr, char *buf)
1228 {
1229         struct sensor_device_attribute_2 *sensor_attr =
1230             to_sensor_dev_attr_2(attr);
1231         int nr = sensor_attr->nr;
1232         int index = sensor_attr->index;
1233         struct w83795_data *data = w83795_update_device(dev);
1234         long temp = temp_from_reg(data->temp[index][nr]);
1235
1236         if (nr == TEMP_READ)
1237                 temp += (data->temp_read_vrlsb[index] >> 6) * 250;
1238         return sprintf(buf, "%ld\n", temp);
1239 }
1240
1241 static ssize_t
1242 store_temp(struct device *dev, struct device_attribute *attr,
1243            const char *buf, size_t count)
1244 {
1245         struct sensor_device_attribute_2 *sensor_attr =
1246             to_sensor_dev_attr_2(attr);
1247         int nr = sensor_attr->nr;
1248         int index = sensor_attr->index;
1249         struct i2c_client *client = to_i2c_client(dev);
1250         struct w83795_data *data = i2c_get_clientdata(client);
1251         long tmp;
1252
1253         if (strict_strtol(buf, 10, &tmp) < 0)
1254                 return -EINVAL;
1255
1256         mutex_lock(&data->update_lock);
1257         data->temp[index][nr] = temp_to_reg(tmp, -128, 127);
1258         w83795_write(client, W83795_REG_TEMP[index][nr], data->temp[index][nr]);
1259         mutex_unlock(&data->update_lock);
1260         return count;
1261 }
1262
1263
1264 static ssize_t
1265 show_dts_mode(struct device *dev, struct device_attribute *attr, char *buf)
1266 {
1267         struct w83795_data *data = dev_get_drvdata(dev);
1268         int tmp;
1269
1270         if (data->enable_dts & 2)
1271                 tmp = 5;
1272         else
1273                 tmp = 6;
1274
1275         return sprintf(buf, "%d\n", tmp);
1276 }
1277
1278 static ssize_t
1279 show_dts(struct device *dev, struct device_attribute *attr, char *buf)
1280 {
1281         struct sensor_device_attribute_2 *sensor_attr =
1282             to_sensor_dev_attr_2(attr);
1283         int index = sensor_attr->index;
1284         struct w83795_data *data = w83795_update_device(dev);
1285         long temp = temp_from_reg(data->dts[index]);
1286
1287         temp += (data->dts_read_vrlsb[index] >> 6) * 250;
1288         return sprintf(buf, "%ld\n", temp);
1289 }
1290
1291 static ssize_t
1292 show_dts_ext(struct device *dev, struct device_attribute *attr, char *buf)
1293 {
1294         struct sensor_device_attribute_2 *sensor_attr =
1295             to_sensor_dev_attr_2(attr);
1296         int nr = sensor_attr->nr;
1297         struct w83795_data *data = dev_get_drvdata(dev);
1298         long temp = temp_from_reg(data->dts_ext[nr]);
1299
1300         return sprintf(buf, "%ld\n", temp);
1301 }
1302
1303 static ssize_t
1304 store_dts_ext(struct device *dev, struct device_attribute *attr,
1305            const char *buf, size_t count)
1306 {
1307         struct sensor_device_attribute_2 *sensor_attr =
1308             to_sensor_dev_attr_2(attr);
1309         int nr = sensor_attr->nr;
1310         struct i2c_client *client = to_i2c_client(dev);
1311         struct w83795_data *data = i2c_get_clientdata(client);
1312         long tmp;
1313
1314         if (strict_strtol(buf, 10, &tmp) < 0)
1315                 return -EINVAL;
1316
1317         mutex_lock(&data->update_lock);
1318         data->dts_ext[nr] = temp_to_reg(tmp, -128, 127);
1319         w83795_write(client, W83795_REG_DTS_EXT(nr), data->dts_ext[nr]);
1320         mutex_unlock(&data->update_lock);
1321         return count;
1322 }
1323
1324
1325 static ssize_t
1326 show_temp_mode(struct device *dev, struct device_attribute *attr, char *buf)
1327 {
1328         struct w83795_data *data = dev_get_drvdata(dev);
1329         struct sensor_device_attribute_2 *sensor_attr =
1330             to_sensor_dev_attr_2(attr);
1331         int index = sensor_attr->index;
1332         int tmp;
1333
1334         if (data->temp_mode & (1 << index))
1335                 tmp = 3;        /* Thermal diode */
1336         else
1337                 tmp = 4;        /* Thermistor */
1338
1339         return sprintf(buf, "%d\n", tmp);
1340 }
1341
1342 /* Only for temp1-4 (temp5-6 can only be thermistor) */
1343 static ssize_t
1344 store_temp_mode(struct device *dev, struct device_attribute *attr,
1345                 const char *buf, size_t count)
1346 {
1347         struct i2c_client *client = to_i2c_client(dev);
1348         struct w83795_data *data = i2c_get_clientdata(client);
1349         struct sensor_device_attribute_2 *sensor_attr =
1350             to_sensor_dev_attr_2(attr);
1351         int index = sensor_attr->index;
1352         int reg_shift;
1353         unsigned long val;
1354         u8 tmp;
1355
1356         if (strict_strtoul(buf, 10, &val) < 0)
1357                 return -EINVAL;
1358         if ((val != 4) && (val != 3))
1359                 return -EINVAL;
1360
1361         mutex_lock(&data->update_lock);
1362         if (val == 3) {
1363                 /* Thermal diode */
1364                 val = 0x01;
1365                 data->temp_mode |= 1 << index;
1366         } else if (val == 4) {
1367                 /* Thermistor */
1368                 val = 0x03;
1369                 data->temp_mode &= ~(1 << index);
1370         }
1371
1372         reg_shift = 2 * index;
1373         tmp = w83795_read(client, W83795_REG_TEMP_CTRL2);
1374         tmp &= ~(0x03 << reg_shift);
1375         tmp |= val << reg_shift;
1376         w83795_write(client, W83795_REG_TEMP_CTRL2, tmp);
1377
1378         mutex_unlock(&data->update_lock);
1379         return count;
1380 }
1381
1382
1383 /* show/store VIN */
1384 static ssize_t
1385 show_in(struct device *dev, struct device_attribute *attr, char *buf)
1386 {
1387         struct sensor_device_attribute_2 *sensor_attr =
1388             to_sensor_dev_attr_2(attr);
1389         int nr = sensor_attr->nr;
1390         int index = sensor_attr->index;
1391         struct w83795_data *data = w83795_update_device(dev);
1392         u16 val = data->in[index][nr];
1393         u8 lsb_idx;
1394
1395         switch (nr) {
1396         case IN_READ:
1397                 /* calculate this value again by sensors as sensors3.conf */
1398                 if ((index >= 17) &&
1399                     !((data->has_gain >> (index - 17)) & 1))
1400                         val *= 8;
1401                 break;
1402         case IN_MAX:
1403         case IN_LOW:
1404                 lsb_idx = IN_LSB_SHIFT_IDX[index][IN_LSB_IDX];
1405                 val <<= 2;
1406                 val |= (data->in_lsb[lsb_idx][nr] >>
1407                         IN_LSB_SHIFT_IDX[index][IN_LSB_SHIFT]) & 0x03;
1408                 if ((index >= 17) &&
1409                     !((data->has_gain >> (index - 17)) & 1))
1410                         val *= 8;
1411                 break;
1412         }
1413         val = in_from_reg(index, val);
1414
1415         return sprintf(buf, "%d\n", val);
1416 }
1417
1418 static ssize_t
1419 store_in(struct device *dev, struct device_attribute *attr,
1420          const char *buf, size_t count)
1421 {
1422         struct sensor_device_attribute_2 *sensor_attr =
1423             to_sensor_dev_attr_2(attr);
1424         int nr = sensor_attr->nr;
1425         int index = sensor_attr->index;
1426         struct i2c_client *client = to_i2c_client(dev);
1427         struct w83795_data *data = i2c_get_clientdata(client);
1428         unsigned long val;
1429         u8 tmp;
1430         u8 lsb_idx;
1431
1432         if (strict_strtoul(buf, 10, &val) < 0)
1433                 return -EINVAL;
1434         val = in_to_reg(index, val);
1435
1436         if ((index >= 17) &&
1437             !((data->has_gain >> (index - 17)) & 1))
1438                 val /= 8;
1439         val = SENSORS_LIMIT(val, 0, 0x3FF);
1440         mutex_lock(&data->update_lock);
1441
1442         lsb_idx = IN_LSB_SHIFT_IDX[index][IN_LSB_IDX];
1443         tmp = w83795_read(client, IN_LSB_REG(lsb_idx, nr));
1444         tmp &= ~(0x03 << IN_LSB_SHIFT_IDX[index][IN_LSB_SHIFT]);
1445         tmp |= (val & 0x03) << IN_LSB_SHIFT_IDX[index][IN_LSB_SHIFT];
1446         w83795_write(client, IN_LSB_REG(lsb_idx, nr), tmp);
1447         data->in_lsb[lsb_idx][nr] = tmp;
1448
1449         tmp = (val >> 2) & 0xff;
1450         w83795_write(client, W83795_REG_IN[index][nr], tmp);
1451         data->in[index][nr] = tmp;
1452
1453         mutex_unlock(&data->update_lock);
1454         return count;
1455 }
1456
1457
1458 static ssize_t
1459 show_sf_setup(struct device *dev, struct device_attribute *attr, char *buf)
1460 {
1461         struct sensor_device_attribute_2 *sensor_attr =
1462             to_sensor_dev_attr_2(attr);
1463         int nr = sensor_attr->nr;
1464         struct w83795_data *data = w83795_update_pwm_config(dev);
1465         u16 val = data->setup_pwm[nr];
1466
1467         switch (nr) {
1468         case SETUP_PWM_UPTIME:
1469         case SETUP_PWM_DOWNTIME:
1470                 val = time_from_reg(val);
1471                 break;
1472         }
1473
1474         return sprintf(buf, "%d\n", val);
1475 }
1476
1477 static ssize_t
1478 store_sf_setup(struct device *dev, struct device_attribute *attr,
1479          const char *buf, size_t count)
1480 {
1481         struct sensor_device_attribute_2 *sensor_attr =
1482             to_sensor_dev_attr_2(attr);
1483         int nr = sensor_attr->nr;
1484         struct i2c_client *client = to_i2c_client(dev);
1485         struct w83795_data *data = i2c_get_clientdata(client);
1486         unsigned long val;
1487
1488         if (strict_strtoul(buf, 10, &val) < 0)
1489                 return -EINVAL;
1490
1491         switch (nr) {
1492         case SETUP_PWM_DEFAULT:
1493                 val = SENSORS_LIMIT(val, 0, 0xff);
1494                 break;
1495         case SETUP_PWM_UPTIME:
1496         case SETUP_PWM_DOWNTIME:
1497                 val = time_to_reg(val);
1498                 if (val == 0)
1499                         return -EINVAL;
1500                 break;
1501         }
1502
1503         mutex_lock(&data->update_lock);
1504         data->setup_pwm[nr] = val;
1505         w83795_write(client, W83795_REG_SETUP_PWM(nr), val);
1506         mutex_unlock(&data->update_lock);
1507         return count;
1508 }
1509
1510
1511 #define NOT_USED                        -1
1512
1513 /* Don't change the attribute order, _max and _min are accessed by index
1514  * somewhere else in the code */
1515 #define SENSOR_ATTR_IN(index) {                                         \
1516         SENSOR_ATTR_2(in##index##_input, S_IRUGO, show_in, NULL,        \
1517                 IN_READ, index), \
1518         SENSOR_ATTR_2(in##index##_max, S_IRUGO | S_IWUSR, show_in,      \
1519                 store_in, IN_MAX, index),                               \
1520         SENSOR_ATTR_2(in##index##_min, S_IRUGO | S_IWUSR, show_in,      \
1521                 store_in, IN_LOW, index),                               \
1522         SENSOR_ATTR_2(in##index##_alarm, S_IRUGO, show_alarm_beep,      \
1523                 NULL, ALARM_STATUS, index + ((index > 14) ? 1 : 0)), \
1524         SENSOR_ATTR_2(in##index##_beep, S_IWUSR | S_IRUGO,              \
1525                 show_alarm_beep, store_beep, BEEP_ENABLE,               \
1526                 index + ((index > 14) ? 1 : 0)) }
1527
1528 #define SENSOR_ATTR_FAN(index) {                                        \
1529         SENSOR_ATTR_2(fan##index##_input, S_IRUGO, show_fan,            \
1530                 NULL, FAN_INPUT, index - 1), \
1531         SENSOR_ATTR_2(fan##index##_min, S_IWUSR | S_IRUGO,              \
1532                 show_fan, store_fan_min, FAN_MIN, index - 1),   \
1533         SENSOR_ATTR_2(fan##index##_alarm, S_IRUGO, show_alarm_beep,     \
1534                 NULL, ALARM_STATUS, index + 31),                        \
1535         SENSOR_ATTR_2(fan##index##_beep, S_IWUSR | S_IRUGO,             \
1536                 show_alarm_beep, store_beep, BEEP_ENABLE, index + 31) }
1537
1538 #define SENSOR_ATTR_PWM(index) {                                        \
1539         SENSOR_ATTR_2(pwm##index, S_IWUSR | S_IRUGO, show_pwm,          \
1540                 store_pwm, PWM_OUTPUT, index - 1),                      \
1541         SENSOR_ATTR_2(pwm##index##_nonstop, S_IWUSR | S_IRUGO,          \
1542                 show_pwm, store_pwm, PWM_NONSTOP, index - 1),           \
1543         SENSOR_ATTR_2(pwm##index##_start, S_IWUSR | S_IRUGO,            \
1544                 show_pwm, store_pwm, PWM_START, index - 1),             \
1545         SENSOR_ATTR_2(pwm##index##_stop_time, S_IWUSR | S_IRUGO,        \
1546                 show_pwm, store_pwm, PWM_STOP_TIME, index - 1),  \
1547         SENSOR_ATTR_2(pwm##index##_freq, S_IWUSR | S_IRUGO,     \
1548                 show_pwm, store_pwm, PWM_FREQ, index - 1),       \
1549         SENSOR_ATTR_2(pwm##index##_enable, S_IWUSR | S_IRUGO,           \
1550                 show_pwm_enable, store_pwm_enable, NOT_USED, index - 1), \
1551         SENSOR_ATTR_2(fan##index##_target, S_IWUSR | S_IRUGO, \
1552                 show_fanin, store_fanin, FANIN_TARGET, index - 1) }
1553
1554 #define SENSOR_ATTR_DTS(index) {                                        \
1555         SENSOR_ATTR_2(temp##index##_type, S_IRUGO ,             \
1556                 show_dts_mode, NULL, NOT_USED, index - 7),      \
1557         SENSOR_ATTR_2(temp##index##_input, S_IRUGO, show_dts,           \
1558                 NULL, NOT_USED, index - 7),                             \
1559         SENSOR_ATTR_2(temp##index##_crit, S_IRUGO | S_IWUSR, show_dts_ext, \
1560                 store_dts_ext, DTS_CRIT, NOT_USED),                     \
1561         SENSOR_ATTR_2(temp##index##_crit_hyst, S_IRUGO | S_IWUSR,       \
1562                 show_dts_ext, store_dts_ext, DTS_CRIT_HYST, NOT_USED),  \
1563         SENSOR_ATTR_2(temp##index##_max, S_IRUGO | S_IWUSR, show_dts_ext, \
1564                 store_dts_ext, DTS_WARN, NOT_USED),                     \
1565         SENSOR_ATTR_2(temp##index##_max_hyst, S_IRUGO | S_IWUSR,        \
1566                 show_dts_ext, store_dts_ext, DTS_WARN_HYST, NOT_USED),  \
1567         SENSOR_ATTR_2(temp##index##_alarm, S_IRUGO,                     \
1568                 show_alarm_beep, NULL, ALARM_STATUS, index + 17),       \
1569         SENSOR_ATTR_2(temp##index##_beep, S_IWUSR | S_IRUGO,            \
1570                 show_alarm_beep, store_beep, BEEP_ENABLE, index + 17) }
1571
1572 #define SENSOR_ATTR_TEMP(index) {                                       \
1573         SENSOR_ATTR_2(temp##index##_type, S_IRUGO | (index < 4 ? S_IWUSR : 0), \
1574                 show_temp_mode, store_temp_mode, NOT_USED, index - 1),  \
1575         SENSOR_ATTR_2(temp##index##_input, S_IRUGO, show_temp,          \
1576                 NULL, TEMP_READ, index - 1),                            \
1577         SENSOR_ATTR_2(temp##index##_crit, S_IRUGO | S_IWUSR, show_temp, \
1578                 store_temp, TEMP_CRIT, index - 1),                      \
1579         SENSOR_ATTR_2(temp##index##_crit_hyst, S_IRUGO | S_IWUSR,       \
1580                 show_temp, store_temp, TEMP_CRIT_HYST, index - 1),      \
1581         SENSOR_ATTR_2(temp##index##_max, S_IRUGO | S_IWUSR, show_temp,  \
1582                 store_temp, TEMP_WARN, index - 1),                      \
1583         SENSOR_ATTR_2(temp##index##_max_hyst, S_IRUGO | S_IWUSR,        \
1584                 show_temp, store_temp, TEMP_WARN_HYST, index - 1),      \
1585         SENSOR_ATTR_2(temp##index##_alarm, S_IRUGO,                     \
1586                 show_alarm_beep, NULL, ALARM_STATUS,                    \
1587                 index + (index > 4 ? 11 : 17)),                         \
1588         SENSOR_ATTR_2(temp##index##_beep, S_IWUSR | S_IRUGO,            \
1589                 show_alarm_beep, store_beep, BEEP_ENABLE,               \
1590                 index + (index > 4 ? 11 : 17)),                         \
1591         SENSOR_ATTR_2(temp##index##_source_sel, S_IWUSR | S_IRUGO,      \
1592                 show_temp_src, store_temp_src, NOT_USED, index - 1),    \
1593         SENSOR_ATTR_2(temp##index##_pwm_enable, S_IWUSR | S_IRUGO,      \
1594                 show_temp_pwm_enable, store_temp_pwm_enable,            \
1595                 TEMP_PWM_ENABLE, index - 1),                            \
1596         SENSOR_ATTR_2(temp##index##_auto_channels_pwm, S_IWUSR | S_IRUGO, \
1597                 show_temp_pwm_enable, store_temp_pwm_enable,            \
1598                 TEMP_PWM_FAN_MAP, index - 1),                           \
1599         SENSOR_ATTR_2(thermal_cruise##index, S_IWUSR | S_IRUGO,         \
1600                 show_temp_pwm, store_temp_pwm, TEMP_PWM_TTTI, index - 1), \
1601         SENSOR_ATTR_2(temp##index##_warn, S_IWUSR | S_IRUGO,            \
1602                 show_temp_pwm, store_temp_pwm, TEMP_PWM_CTFS, index - 1), \
1603         SENSOR_ATTR_2(temp##index##_warn_hyst, S_IWUSR | S_IRUGO,       \
1604                 show_temp_pwm, store_temp_pwm, TEMP_PWM_HCT, index - 1), \
1605         SENSOR_ATTR_2(temp##index##_operation_hyst, S_IWUSR | S_IRUGO,  \
1606                 show_temp_pwm, store_temp_pwm, TEMP_PWM_HOT, index - 1), \
1607         SENSOR_ATTR_2(temp##index##_auto_point1_pwm, S_IRUGO | S_IWUSR, \
1608                 show_sf4_pwm, store_sf4_pwm, 0, index - 1),             \
1609         SENSOR_ATTR_2(temp##index##_auto_point2_pwm, S_IRUGO | S_IWUSR, \
1610                 show_sf4_pwm, store_sf4_pwm, 1, index - 1),             \
1611         SENSOR_ATTR_2(temp##index##_auto_point3_pwm, S_IRUGO | S_IWUSR, \
1612                 show_sf4_pwm, store_sf4_pwm, 2, index - 1),             \
1613         SENSOR_ATTR_2(temp##index##_auto_point4_pwm, S_IRUGO | S_IWUSR, \
1614                 show_sf4_pwm, store_sf4_pwm, 3, index - 1),             \
1615         SENSOR_ATTR_2(temp##index##_auto_point5_pwm, S_IRUGO | S_IWUSR, \
1616                 show_sf4_pwm, store_sf4_pwm, 4, index - 1),             \
1617         SENSOR_ATTR_2(temp##index##_auto_point6_pwm, S_IRUGO | S_IWUSR, \
1618                 show_sf4_pwm, store_sf4_pwm, 5, index - 1),             \
1619         SENSOR_ATTR_2(temp##index##_auto_point7_pwm, S_IRUGO | S_IWUSR, \
1620                 show_sf4_pwm, store_sf4_pwm, 6, index - 1),             \
1621         SENSOR_ATTR_2(temp##index##_auto_point1_temp, S_IRUGO | S_IWUSR,\
1622                 show_sf4_temp, store_sf4_temp, 0, index - 1),           \
1623         SENSOR_ATTR_2(temp##index##_auto_point2_temp, S_IRUGO | S_IWUSR,\
1624                 show_sf4_temp, store_sf4_temp, 1, index - 1),           \
1625         SENSOR_ATTR_2(temp##index##_auto_point3_temp, S_IRUGO | S_IWUSR,\
1626                 show_sf4_temp, store_sf4_temp, 2, index - 1),           \
1627         SENSOR_ATTR_2(temp##index##_auto_point4_temp, S_IRUGO | S_IWUSR,\
1628                 show_sf4_temp, store_sf4_temp, 3, index - 1),           \
1629         SENSOR_ATTR_2(temp##index##_auto_point5_temp, S_IRUGO | S_IWUSR,\
1630                 show_sf4_temp, store_sf4_temp, 4, index - 1),           \
1631         SENSOR_ATTR_2(temp##index##_auto_point6_temp, S_IRUGO | S_IWUSR,\
1632                 show_sf4_temp, store_sf4_temp, 5, index - 1),           \
1633         SENSOR_ATTR_2(temp##index##_auto_point7_temp, S_IRUGO | S_IWUSR,\
1634                 show_sf4_temp, store_sf4_temp, 6, index - 1) }
1635
1636
1637 static struct sensor_device_attribute_2 w83795_in[][5] = {
1638         SENSOR_ATTR_IN(0),
1639         SENSOR_ATTR_IN(1),
1640         SENSOR_ATTR_IN(2),
1641         SENSOR_ATTR_IN(3),
1642         SENSOR_ATTR_IN(4),
1643         SENSOR_ATTR_IN(5),
1644         SENSOR_ATTR_IN(6),
1645         SENSOR_ATTR_IN(7),
1646         SENSOR_ATTR_IN(8),
1647         SENSOR_ATTR_IN(9),
1648         SENSOR_ATTR_IN(10),
1649         SENSOR_ATTR_IN(11),
1650         SENSOR_ATTR_IN(12),
1651         SENSOR_ATTR_IN(13),
1652         SENSOR_ATTR_IN(14),
1653         SENSOR_ATTR_IN(15),
1654         SENSOR_ATTR_IN(16),
1655         SENSOR_ATTR_IN(17),
1656         SENSOR_ATTR_IN(18),
1657         SENSOR_ATTR_IN(19),
1658         SENSOR_ATTR_IN(20),
1659 };
1660
1661 static const struct sensor_device_attribute_2 w83795_fan[][4] = {
1662         SENSOR_ATTR_FAN(1),
1663         SENSOR_ATTR_FAN(2),
1664         SENSOR_ATTR_FAN(3),
1665         SENSOR_ATTR_FAN(4),
1666         SENSOR_ATTR_FAN(5),
1667         SENSOR_ATTR_FAN(6),
1668         SENSOR_ATTR_FAN(7),
1669         SENSOR_ATTR_FAN(8),
1670         SENSOR_ATTR_FAN(9),
1671         SENSOR_ATTR_FAN(10),
1672         SENSOR_ATTR_FAN(11),
1673         SENSOR_ATTR_FAN(12),
1674         SENSOR_ATTR_FAN(13),
1675         SENSOR_ATTR_FAN(14),
1676 };
1677
1678 static const struct sensor_device_attribute_2 w83795_temp[][29] = {
1679         SENSOR_ATTR_TEMP(1),
1680         SENSOR_ATTR_TEMP(2),
1681         SENSOR_ATTR_TEMP(3),
1682         SENSOR_ATTR_TEMP(4),
1683         SENSOR_ATTR_TEMP(5),
1684         SENSOR_ATTR_TEMP(6),
1685 };
1686
1687 static const struct sensor_device_attribute_2 w83795_dts[][8] = {
1688         SENSOR_ATTR_DTS(7),
1689         SENSOR_ATTR_DTS(8),
1690         SENSOR_ATTR_DTS(9),
1691         SENSOR_ATTR_DTS(10),
1692         SENSOR_ATTR_DTS(11),
1693         SENSOR_ATTR_DTS(12),
1694         SENSOR_ATTR_DTS(13),
1695         SENSOR_ATTR_DTS(14),
1696 };
1697
1698 static const struct sensor_device_attribute_2 w83795_pwm[][7] = {
1699         SENSOR_ATTR_PWM(1),
1700         SENSOR_ATTR_PWM(2),
1701         SENSOR_ATTR_PWM(3),
1702         SENSOR_ATTR_PWM(4),
1703         SENSOR_ATTR_PWM(5),
1704         SENSOR_ATTR_PWM(6),
1705         SENSOR_ATTR_PWM(7),
1706         SENSOR_ATTR_PWM(8),
1707 };
1708
1709 static const struct sensor_device_attribute_2 sda_single_files[] = {
1710         SENSOR_ATTR_2(chassis, S_IWUSR | S_IRUGO, show_alarm_beep,
1711                       store_chassis_clear, ALARM_STATUS, 46),
1712         SENSOR_ATTR_2(beep_enable, S_IWUSR | S_IRUGO, show_alarm_beep,
1713                       store_beep, BEEP_ENABLE, 47),
1714         SENSOR_ATTR_2(speed_cruise_tolerance, S_IWUSR | S_IRUGO, show_fanin,
1715                 store_fanin, FANIN_TOL, NOT_USED),
1716         SENSOR_ATTR_2(pwm_default, S_IWUSR | S_IRUGO, show_sf_setup,
1717                       store_sf_setup, SETUP_PWM_DEFAULT, NOT_USED),
1718         SENSOR_ATTR_2(pwm_uptime, S_IWUSR | S_IRUGO, show_sf_setup,
1719                       store_sf_setup, SETUP_PWM_UPTIME, NOT_USED),
1720         SENSOR_ATTR_2(pwm_downtime, S_IWUSR | S_IRUGO, show_sf_setup,
1721                       store_sf_setup, SETUP_PWM_DOWNTIME, NOT_USED),
1722 };
1723
1724 /*
1725  * Driver interface
1726  */
1727
1728 static void w83795_init_client(struct i2c_client *client)
1729 {
1730         struct w83795_data *data = i2c_get_clientdata(client);
1731         static const u16 clkin[4] = {   /* in kHz */
1732                 14318, 24000, 33333, 48000
1733         };
1734         u8 config;
1735
1736         if (reset)
1737                 w83795_write(client, W83795_REG_CONFIG, 0x80);
1738
1739         /* Start monitoring if needed */
1740         config = w83795_read(client, W83795_REG_CONFIG);
1741         if (!(config & W83795_REG_CONFIG_START)) {
1742                 dev_info(&client->dev, "Enabling monitoring operations\n");
1743                 w83795_write(client, W83795_REG_CONFIG,
1744                              config | W83795_REG_CONFIG_START);
1745         }
1746
1747         data->clkin = clkin[(config >> 3) & 0x3];
1748         dev_dbg(&client->dev, "clkin = %u kHz\n", data->clkin);
1749 }
1750
1751 static int w83795_get_device_id(struct i2c_client *client)
1752 {
1753         int device_id;
1754
1755         device_id = i2c_smbus_read_byte_data(client, W83795_REG_DEVICEID);
1756
1757         /* Special case for rev. A chips; can't be checked first because later
1758            revisions emulate this for compatibility */
1759         if (device_id < 0 || (device_id & 0xf0) != 0x50) {
1760                 int alt_id;
1761
1762                 alt_id = i2c_smbus_read_byte_data(client,
1763                                                   W83795_REG_DEVICEID_A);
1764                 if (alt_id == 0x50)
1765                         device_id = alt_id;
1766         }
1767
1768         return device_id;
1769 }
1770
1771 /* Return 0 if detection is successful, -ENODEV otherwise */
1772 static int w83795_detect(struct i2c_client *client,
1773                          struct i2c_board_info *info)
1774 {
1775         int bank, vendor_id, device_id, expected, i2c_addr, config;
1776         struct i2c_adapter *adapter = client->adapter;
1777         unsigned short address = client->addr;
1778         const char *chip_name;
1779
1780         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1781                 return -ENODEV;
1782         bank = i2c_smbus_read_byte_data(client, W83795_REG_BANKSEL);
1783         if (bank < 0 || (bank & 0x7c)) {
1784                 dev_dbg(&adapter->dev,
1785                         "w83795: Detection failed at addr 0x%02hx, check %s\n",
1786                         address, "bank");
1787                 return -ENODEV;
1788         }
1789
1790         /* Check Nuvoton vendor ID */
1791         vendor_id = i2c_smbus_read_byte_data(client, W83795_REG_VENDORID);
1792         expected = bank & 0x80 ? 0x5c : 0xa3;
1793         if (vendor_id != expected) {
1794                 dev_dbg(&adapter->dev,
1795                         "w83795: Detection failed at addr 0x%02hx, check %s\n",
1796                         address, "vendor id");
1797                 return -ENODEV;
1798         }
1799
1800         /* Check device ID */
1801         device_id = w83795_get_device_id(client) |
1802                     (i2c_smbus_read_byte_data(client, W83795_REG_CHIPID) << 8);
1803         if ((device_id >> 4) != 0x795) {
1804                 dev_dbg(&adapter->dev,
1805                         "w83795: Detection failed at addr 0x%02hx, check %s\n",
1806                         address, "device id\n");
1807                 return -ENODEV;
1808         }
1809
1810         /* If Nuvoton chip, address of chip and W83795_REG_I2C_ADDR
1811            should match */
1812         if ((bank & 0x07) == 0) {
1813                 i2c_addr = i2c_smbus_read_byte_data(client,
1814                                                     W83795_REG_I2C_ADDR);
1815                 if ((i2c_addr & 0x7f) != address) {
1816                         dev_dbg(&adapter->dev,
1817                                 "w83795: Detection failed at addr 0x%02hx, "
1818                                 "check %s\n", address, "i2c addr");
1819                         return -ENODEV;
1820                 }
1821         }
1822
1823         /* Check 795 chip type: 795G or 795ADG
1824            Usually we don't write to chips during detection, but here we don't
1825            quite have the choice; hopefully it's OK, we are about to return
1826            success anyway */
1827         if ((bank & 0x07) != 0)
1828                 i2c_smbus_write_byte_data(client, W83795_REG_BANKSEL,
1829                                           bank & ~0x07);
1830         config = i2c_smbus_read_byte_data(client, W83795_REG_CONFIG);
1831         if (config & W83795_REG_CONFIG_CONFIG48)
1832                 chip_name = "w83795adg";
1833         else
1834                 chip_name = "w83795g";
1835
1836         strlcpy(info->type, chip_name, I2C_NAME_SIZE);
1837         dev_info(&adapter->dev, "Found %s rev. %c at 0x%02hx\n", chip_name,
1838                  'A' + (device_id & 0xf), address);
1839
1840         return 0;
1841 }
1842
1843 static int w83795_handle_files(struct device *dev, int (*fn)(struct device *,
1844                                const struct device_attribute *))
1845 {
1846         struct w83795_data *data = dev_get_drvdata(dev);
1847         int err, i, j;
1848
1849         for (i = 0; i < ARRAY_SIZE(w83795_in); i++) {
1850                 if (!(data->has_in & (1 << i)))
1851                         continue;
1852                 for (j = 0; j < ARRAY_SIZE(w83795_in[0]); j++) {
1853                         err = fn(dev, &w83795_in[i][j].dev_attr);
1854                         if (err)
1855                                 return err;
1856                 }
1857         }
1858
1859         for (i = 0; i < ARRAY_SIZE(w83795_fan); i++) {
1860                 if (!(data->has_fan & (1 << i)))
1861                         continue;
1862                 for (j = 0; j < ARRAY_SIZE(w83795_fan[0]); j++) {
1863                         err = fn(dev, &w83795_fan[i][j].dev_attr);
1864                         if (err)
1865                                 return err;
1866                 }
1867         }
1868
1869         for (i = 0; i < ARRAY_SIZE(sda_single_files); i++) {
1870                 err = fn(dev, &sda_single_files[i].dev_attr);
1871                 if (err)
1872                         return err;
1873         }
1874
1875         for (i = 0; i < data->has_pwm; i++) {
1876                 for (j = 0; j < ARRAY_SIZE(w83795_pwm[0]); j++) {
1877                         err = fn(dev, &w83795_pwm[i][j].dev_attr);
1878                         if (err)
1879                                 return err;
1880                 }
1881         }
1882
1883         for (i = 0; i < ARRAY_SIZE(w83795_temp); i++) {
1884                 if (!(data->has_temp & (1 << i)))
1885                         continue;
1886                 for (j = 0; j < ARRAY_SIZE(w83795_temp[0]); j++) {
1887                         err = fn(dev, &w83795_temp[i][j].dev_attr);
1888                         if (err)
1889                                 return err;
1890                 }
1891         }
1892
1893         if (data->enable_dts) {
1894                 for (i = 0; i < ARRAY_SIZE(w83795_dts); i++) {
1895                         if (!(data->has_dts & (1 << i)))
1896                                 continue;
1897                         for (j = 0; j < ARRAY_SIZE(w83795_dts[0]); j++) {
1898                                 err = fn(dev, &w83795_dts[i][j].dev_attr);
1899                                 if (err)
1900                                         return err;
1901                         }
1902                 }
1903         }
1904
1905         return 0;
1906 }
1907
1908 /* We need a wrapper that fits in w83795_handle_files */
1909 static int device_remove_file_wrapper(struct device *dev,
1910                                       const struct device_attribute *attr)
1911 {
1912         device_remove_file(dev, attr);
1913         return 0;
1914 }
1915
1916 static void w83795_check_dynamic_in_limits(struct i2c_client *client)
1917 {
1918         struct w83795_data *data = i2c_get_clientdata(client);
1919         u8 vid_ctl;
1920         int i, err_max, err_min;
1921
1922         vid_ctl = w83795_read(client, W83795_REG_VID_CTRL);
1923
1924         /* Return immediately if VRM isn't configured */
1925         if ((vid_ctl & 0x07) == 0x00 || (vid_ctl & 0x07) == 0x07)
1926                 return;
1927
1928         data->has_dyn_in = (vid_ctl >> 3) & 0x07;
1929         for (i = 0; i < 2; i++) {
1930                 if (!(data->has_dyn_in & (1 << i)))
1931                         continue;
1932
1933                 /* Voltage limits in dynamic mode, switch to read-only */
1934                 err_max = sysfs_chmod_file(&client->dev.kobj,
1935                                            &w83795_in[i][2].dev_attr.attr,
1936                                            S_IRUGO);
1937                 err_min = sysfs_chmod_file(&client->dev.kobj,
1938                                            &w83795_in[i][3].dev_attr.attr,
1939                                            S_IRUGO);
1940                 if (err_max || err_min)
1941                         dev_warn(&client->dev, "Failed to set in%d limits "
1942                                  "read-only (%d, %d)\n", i, err_max, err_min);
1943                 else
1944                         dev_info(&client->dev, "in%d limits set dynamically "
1945                                  "from VID\n", i);
1946         }
1947 }
1948
1949 /* Check pins that can be used for either temperature or voltage monitoring */
1950 static void w83795_apply_temp_config(struct w83795_data *data, u8 config,
1951                                      int temp_chan, int in_chan)
1952 {
1953         /* config is a 2-bit value */
1954         switch (config) {
1955         case 0x2: /* Voltage monitoring */
1956                 data->has_in |= 1 << in_chan;
1957                 break;
1958         case 0x1: /* Thermal diode */
1959                 if (temp_chan >= 4)
1960                         break;
1961                 data->temp_mode |= 1 << temp_chan;
1962                 /* fall through */
1963         case 0x3: /* Thermistor */
1964                 data->has_temp |= 1 << temp_chan;
1965                 break;
1966         }
1967 }
1968
1969 static int w83795_probe(struct i2c_client *client,
1970                         const struct i2c_device_id *id)
1971 {
1972         int i;
1973         u8 tmp;
1974         struct device *dev = &client->dev;
1975         struct w83795_data *data;
1976         int err;
1977
1978         data = kzalloc(sizeof(struct w83795_data), GFP_KERNEL);
1979         if (!data) {
1980                 err = -ENOMEM;
1981                 goto exit;
1982         }
1983
1984         i2c_set_clientdata(client, data);
1985         data->chip_type = id->driver_data;
1986         data->bank = i2c_smbus_read_byte_data(client, W83795_REG_BANKSEL);
1987         mutex_init(&data->update_lock);
1988
1989         /* Initialize the chip */
1990         w83795_init_client(client);
1991
1992         /* Check which voltages and fans are present */
1993         data->has_in = w83795_read(client, W83795_REG_VOLT_CTRL1)
1994                      | (w83795_read(client, W83795_REG_VOLT_CTRL2) << 8);
1995         data->has_fan = w83795_read(client, W83795_REG_FANIN_CTRL1)
1996                       | (w83795_read(client, W83795_REG_FANIN_CTRL2) << 8);
1997
1998         /* Check which analog temperatures and extra voltages are present */
1999         tmp = w83795_read(client, W83795_REG_TEMP_CTRL1);
2000         if (tmp & 0x20)
2001                 data->enable_dts = 1;
2002         w83795_apply_temp_config(data, (tmp >> 2) & 0x3, 5, 16);
2003         w83795_apply_temp_config(data, tmp & 0x3, 4, 15);
2004         tmp = w83795_read(client, W83795_REG_TEMP_CTRL2);
2005         w83795_apply_temp_config(data, tmp >> 6, 3, 20);
2006         w83795_apply_temp_config(data, (tmp >> 4) & 0x3, 2, 19);
2007         w83795_apply_temp_config(data, (tmp >> 2) & 0x3, 1, 18);
2008         w83795_apply_temp_config(data, tmp & 0x3, 0, 17);
2009
2010         /* Check DTS enable status */
2011         if (data->enable_dts) {
2012                 if (1 & w83795_read(client, W83795_REG_DTSC))
2013                         data->enable_dts |= 2;
2014                 data->has_dts = w83795_read(client, W83795_REG_DTSE);
2015         }
2016
2017         /* Report PECI Tbase values */
2018         if (data->enable_dts == 1) {
2019                 for (i = 0; i < 8; i++) {
2020                         if (!(data->has_dts & (1 << i)))
2021                                 continue;
2022                         tmp = w83795_read(client, W83795_REG_PECI_TBASE(i));
2023                         dev_info(&client->dev,
2024                                  "PECI agent %d Tbase temperature: %u\n",
2025                                  i + 1, (unsigned int)tmp & 0x7f);
2026                 }
2027         }
2028
2029         data->has_gain = w83795_read(client, W83795_REG_VMIGB_CTRL) & 0x0f;
2030
2031         /* pwm and smart fan */
2032         if (data->chip_type == w83795g)
2033                 data->has_pwm = 8;
2034         else
2035                 data->has_pwm = 2;
2036
2037         err = w83795_handle_files(dev, device_create_file);
2038         if (err)
2039                 goto exit_remove;
2040
2041         if (data->chip_type == w83795g)
2042                 w83795_check_dynamic_in_limits(client);
2043
2044         data->hwmon_dev = hwmon_device_register(dev);
2045         if (IS_ERR(data->hwmon_dev)) {
2046                 err = PTR_ERR(data->hwmon_dev);
2047                 goto exit_remove;
2048         }
2049
2050         return 0;
2051
2052 exit_remove:
2053         w83795_handle_files(dev, device_remove_file_wrapper);
2054         kfree(data);
2055 exit:
2056         return err;
2057 }
2058
2059 static int w83795_remove(struct i2c_client *client)
2060 {
2061         struct w83795_data *data = i2c_get_clientdata(client);
2062
2063         hwmon_device_unregister(data->hwmon_dev);
2064         w83795_handle_files(&client->dev, device_remove_file_wrapper);
2065         kfree(data);
2066
2067         return 0;
2068 }
2069
2070
2071 static const struct i2c_device_id w83795_id[] = {
2072         { "w83795g", w83795g },
2073         { "w83795adg", w83795adg },
2074         { }
2075 };
2076 MODULE_DEVICE_TABLE(i2c, w83795_id);
2077
2078 static struct i2c_driver w83795_driver = {
2079         .driver = {
2080                    .name = "w83795",
2081         },
2082         .probe          = w83795_probe,
2083         .remove         = w83795_remove,
2084         .id_table       = w83795_id,
2085
2086         .class          = I2C_CLASS_HWMON,
2087         .detect         = w83795_detect,
2088         .address_list   = normal_i2c,
2089 };
2090
2091 static int __init sensors_w83795_init(void)
2092 {
2093         return i2c_add_driver(&w83795_driver);
2094 }
2095
2096 static void __exit sensors_w83795_exit(void)
2097 {
2098         i2c_del_driver(&w83795_driver);
2099 }
2100
2101 MODULE_AUTHOR("Wei Song, Jean Delvare <khali@linux-fr.org>");
2102 MODULE_DESCRIPTION("W83795G/ADG hardware monitoring driver");
2103 MODULE_LICENSE("GPL");
2104
2105 module_init(sensors_w83795_init);
2106 module_exit(sensors_w83795_exit);