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_START                       1
 182 #define PWM_NONSTOP                     2
 183 #define PWM_STOP_TIME                   3
 184 #define PWM_FREQ                        4
 185 #define W83795_REG_PWM(index, nr) \
 186         (((nr) == 0 ? 0x210 : \
 187           (nr) == 1 ? 0x220 : \
 188           (nr) == 2 ? 0x228 : \
 189           (nr) == 3 ? 0x230 : 0x218) + (index))
 190
 191 #define W83795_REG_FTSH(index)          (0x240 + (index) * 2)
 192 #define W83795_REG_FTSL(index)          (0x241 + (index) * 2)
 193 #define W83795_REG_TFTS                 0x250
 194
 195 #define TEMP_PWM_TTTI                   0
 196 #define TEMP_PWM_CTFS                   1
 197 #define TEMP_PWM_HCT                    2
 198 #define TEMP_PWM_HOT                    3
 199 #define W83795_REG_TTTI(index)          (0x260 + (index))
 200 #define W83795_REG_CTFS(index)          (0x268 + (index))
 201 #define W83795_REG_HT(index)            (0x270 + (index))
 202
 203 #define SF4_TEMP                        0
 204 #define SF4_PWM                         1
 205 #define W83795_REG_SF4_TEMP(temp_num, index) \
 206         (0x280 + 0x10 * (temp_num) + (index))
 207 #define W83795_REG_SF4_PWM(temp_num, index) \
 208         (0x288 + 0x10 * (temp_num) + (index))
 209
 210 #define W83795_REG_DTSC                 0x301
 211 #define W83795_REG_DTSE                 0x302
 212 #define W83795_REG_DTS(index)           (0x26 + (index))
 213 #define W83795_REG_PECI_TBASE(index)    (0x320 + (index))
 214
 215 #define DTS_CRIT                        0
 216 #define DTS_CRIT_HYST                   1
 217 #define DTS_WARN                        2
 218 #define DTS_WARN_HYST                   3
 219 #define W83795_REG_DTS_EXT(index)       (0xB2 + (index))
 220
 221 #define SETUP_PWM_DEFAULT               0
 222 #define SETUP_PWM_UPTIME                1
 223 #define SETUP_PWM_DOWNTIME              2
 224 #define W83795_REG_SETUP_PWM(index)    (0x20C + (index))
 225
 226 static inline u16 in_from_reg(u8 index, u16 val)
 227 {
 228         /* 3VDD, 3VSB and VBAT: 6 mV/bit; other inputs: 2 mV/bit */
 229         if (index >= 12 && index <= 14)
 230                 return val * 6;
 231         else
 232                 return val * 2;
 233 }
 234
 235 static inline u16 in_to_reg(u8 index, u16 val)
 236 {
 237         if (index >= 12 && index <= 14)
 238                 return val / 6;
 239         else
 240                 return val / 2;
 241 }
 242
 243 static inline unsigned long fan_from_reg(u16 val)
 244 {
 245         if ((val == 0xfff) || (val == 0))
 246                 return 0;
 247         return 1350000UL / val;
 248 }
 249
 250 static inline u16 fan_to_reg(long rpm)
 251 {
 252         if (rpm <= 0)
 253                 return 0x0fff;
 254         return SENSORS_LIMIT((1350000 + (rpm >> 1)) / rpm, 1, 0xffe);
 255 }
 256
 257 static inline unsigned long time_from_reg(u8 reg)
 258 {
 259         return reg * 100;
 260 }
 261
 262 static inline u8 time_to_reg(unsigned long val)
 263 {
 264         return SENSORS_LIMIT((val + 50) / 100, 0, 0xff);
 265 }
 266
 267 static inline long temp_from_reg(s8 reg)
 268 {
 269         return reg * 1000;
 270 }
 271
 272 static inline s8 temp_to_reg(long val, s8 min, s8 max)
 273 {
 274         return SENSORS_LIMIT(val / 1000, min, max);
 275 }
 276
 277 static const u16 pwm_freq_cksel0[16] = {
 278         1024, 512, 341, 256, 205, 171, 146, 128,
 279         85, 64, 32, 16, 8, 4, 2, 1
 280 };
 281
 282 static unsigned int pwm_freq_from_reg(u8 reg, u16 clkin)
 283 {
 284         unsigned long base_clock;
 285
 286         if (reg & 0x80) {
 287                 base_clock = clkin * 1000 / ((clkin == 48000) ? 384 : 256);
 288                 return base_clock / ((reg & 0x7f) + 1);
 289         } else
 290                 return pwm_freq_cksel0[reg & 0x0f];
 291 }
 292
 293 static u8 pwm_freq_to_reg(unsigned long val, u16 clkin)
 294 {
 295         unsigned long base_clock;
 296         u8 reg0, reg1;
 297         unsigned long best0, best1;
 298
 299         /* Best fit for cksel = 0 */
 300         for (reg0 = 0; reg0 < ARRAY_SIZE(pwm_freq_cksel0) - 1; reg0++) {
 301                 if (val > (pwm_freq_cksel0[reg0] +
 302                            pwm_freq_cksel0[reg0 + 1]) / 2)
 303                         break;
 304         }
 305         if (val < 375)  /* cksel = 1 can't beat this */
 306                 return reg0;
 307         best0 = pwm_freq_cksel0[reg0];
 308
 309         /* Best fit for cksel = 1 */
 310         base_clock = clkin * 1000 / ((clkin == 48000) ? 384 : 256);
 311         reg1 = SENSORS_LIMIT(DIV_ROUND_CLOSEST(base_clock, val), 1, 128);
 312         best1 = base_clock / reg1;
 313         reg1 = 0x80 | (reg1 - 1);
 314
 315         /* Choose the closest one */
 316         if (abs(val - best0) > abs(val - best1))
 317                 return reg1;
 318         else
 319                 return reg0;
 320 }
 321
 322 enum chip_types {w83795g, w83795adg};
 323
 324 struct w83795_data {
 325         struct device *hwmon_dev;
 326         struct mutex update_lock;
 327         unsigned long last_updated;     /* In jiffies */
 328         enum chip_types chip_type;
 329
 330         u8 bank;
 331
 332         u32 has_in;             /* Enable monitor VIN or not */
 333         u8 has_dyn_in;          /* Only in2-0 can have this */
 334         u16 in[21][3];          /* Register value, read/high/low */
 335         u8 in_lsb[10][3];       /* LSB Register value, high/low */
 336         u8 has_gain;            /* has gain: in17-20 * 8 */
 337
 338         u16 has_fan;            /* Enable fan14-1 or not */
 339         u16 fan[14];            /* Register value combine */
 340         u16 fan_min[14];        /* Register value combine */
 341
 342         u8 has_temp;            /* Enable monitor temp6-1 or not */
 343         s8 temp[6][5];          /* current, crit, crit_hyst, warn, warn_hyst */
 344         u8 temp_read_vrlsb[6];
 345         u8 temp_mode;           /* Bit vector, 0 = TR, 1 = TD */
 346         u8 temp_src[3];         /* Register value */
 347
 348         u8 enable_dts;          /* Enable PECI and SB-TSI,
 349                                  * bit 0: =1 enable, =0 disable,
 350                                  * bit 1: =1 AMD SB-TSI, =0 Intel PECI */
 351         u8 has_dts;             /* Enable monitor DTS temp */
 352         s8 dts[8];              /* Register value */
 353         u8 dts_read_vrlsb[8];   /* Register value */
 354         s8 dts_ext[4];          /* Register value */
 355
 356         u8 has_pwm;             /* 795g supports 8 pwm, 795adg only supports 2,
 357                                  * no config register, only affected by chip
 358                                  * type */
 359         u8 pwm[8][5];           /* Register value, output, start, non stop, stop
 360                                  * time, freq */
 361         u16 clkin;              /* CLKIN frequency in kHz */
 362         u8 pwm_fcms[2];         /* Register value */
 363         u8 pwm_tfmr[6];         /* Register value */
 364         u8 pwm_fomc;            /* Register value */
 365
 366         u16 target_speed[8];    /* Register value, target speed for speed
 367                                  * cruise */
 368         u8 tol_speed;           /* tolerance of target speed */
 369         u8 pwm_temp[6][4];      /* TTTI, CTFS, HCT, HOT */
 370         u8 sf4_reg[6][2][7];    /* 6 temp, temp/dcpwm, 7 registers */
 371
 372         u8 setup_pwm[3];        /* Register value */
 373
 374         u8 alarms[6];           /* Register value */
 375         u8 beeps[6];            /* Register value */
 376
 377         char valid;
 378 };
 379
 380 /*
 381  * Hardware access
 382  * We assume that nobdody can change the bank outside the driver.
 383  */
 384
 385 /* Must be called with data->update_lock held, except during initialization */
 386 static int w83795_set_bank(struct i2c_client *client, u8 bank)
 387 {
 388         struct w83795_data *data = i2c_get_clientdata(client);
 389         int err;
 390
 391         /* If the same bank is already set, nothing to do */
 392         if ((data->bank & 0x07) == bank)
 393                 return 0;
 394
 395         /* Change to new bank, preserve all other bits */
 396         bank |= data->bank & ~0x07;
 397         err = i2c_smbus_write_byte_data(client, W83795_REG_BANKSEL, bank);
 398         if (err < 0) {
 399                 dev_err(&client->dev,
 400                         "Failed to set bank to %d, err %d\n",
 401                         (int)bank, err);
 402                 return err;
 403         }
 404         data->bank = bank;
 405
 406         return 0;
 407 }
 408
 409 /* Must be called with data->update_lock held, except during initialization */
 410 static u8 w83795_read(struct i2c_client *client, u16 reg)
 411 {
 412         int err;
 413
 414         err = w83795_set_bank(client, reg >> 8);
 415         if (err < 0)
 416                 return 0x00;    /* Arbitrary */
 417
 418         err = i2c_smbus_read_byte_data(client, reg & 0xff);
 419         if (err < 0) {
 420                 dev_err(&client->dev,
 421                         "Failed to read from register 0x%03x, err %d\n",
 422                         (int)reg, err);
 423                 return 0x00;    /* Arbitrary */
 424         }
 425         return err;
 426 }
 427
 428 /* Must be called with data->update_lock held, except during initialization */
 429 static int w83795_write(struct i2c_client *client, u16 reg, u8 value)
 430 {
 431         int err;
 432
 433         err = w83795_set_bank(client, reg >> 8);
 434         if (err < 0)
 435                 return err;
 436
 437         err = i2c_smbus_write_byte_data(client, reg & 0xff, value);
 438         if (err < 0)
 439                 dev_err(&client->dev,
 440                         "Failed to write to register 0x%03x, err %d\n",
 441                         (int)reg, err);
 442         return err;
 443 }
 444
 445 static struct w83795_data *w83795_update_device(struct device *dev)
 446 {
 447         struct i2c_client *client = to_i2c_client(dev);
 448         struct w83795_data *data = i2c_get_clientdata(client);
 449         u16 tmp;
 450         int i;
 451
 452         mutex_lock(&data->update_lock);
 453
 454         if (!(time_after(jiffies, data->last_updated + HZ * 2)
 455               || !data->valid))
 456                 goto END;
 457
 458         /* Update the voltages value */
 459         for (i = 0; i < ARRAY_SIZE(data->in); i++) {
 460                 if (!(data->has_in & (1 << i)))
 461                         continue;
 462                 tmp = w83795_read(client, W83795_REG_IN[i][IN_READ]) << 2;
 463                 tmp |= w83795_read(client, W83795_REG_VRLSB) >> 6;
 464                 data->in[i][IN_READ] = tmp;
 465         }
 466
 467         /* in0-2 can have dynamic limits (W83795G only) */
 468         if (data->has_dyn_in) {
 469                 u8 lsb_max = w83795_read(client, IN_LSB_REG(0, IN_MAX));
 470                 u8 lsb_low = w83795_read(client, IN_LSB_REG(0, IN_LOW));
 471
 472                 for (i = 0; i < 3; i++) {
 473                         if (!(data->has_dyn_in & (1 << i)))
 474                                 continue;
 475                         data->in[i][IN_MAX] =
 476                                 w83795_read(client, W83795_REG_IN[i][IN_MAX]);
 477                         data->in[i][IN_LOW] =
 478                                 w83795_read(client, W83795_REG_IN[i][IN_LOW]);
 479                         data->in_lsb[i][IN_MAX] = (lsb_max >> (2 * i)) & 0x03;
 480                         data->in_lsb[i][IN_LOW] = (lsb_low >> (2 * i)) & 0x03;
 481                 }
 482         }
 483
 484         /* Update fan */
 485         for (i = 0; i < ARRAY_SIZE(data->fan); i++) {
 486                 if (!(data->has_fan & (1 << i)))
 487                         continue;
 488                 data->fan[i] = w83795_read(client, W83795_REG_FAN(i)) << 4;
 489                 data->fan[i] |=
 490                   (w83795_read(client, W83795_REG_VRLSB) >> 4) & 0x0F;
 491         }
 492
 493         /* Update temperature */
 494         for (i = 0; i < ARRAY_SIZE(data->temp); i++) {
 495                 data->temp[i][TEMP_READ] =
 496                         w83795_read(client, W83795_REG_TEMP[i][TEMP_READ]);
 497                 data->temp_read_vrlsb[i] =
 498                         w83795_read(client, W83795_REG_VRLSB);
 499         }
 500
 501         /* Update dts temperature */
 502         if (data->enable_dts != 0) {
 503                 for (i = 0; i < ARRAY_SIZE(data->dts); i++) {
 504                         if (!(data->has_dts & (1 << i)))
 505                                 continue;
 506                         data->dts[i] =
 507                                 w83795_read(client, W83795_REG_DTS(i));
 508                         data->dts_read_vrlsb[i] =
 509                                 w83795_read(client, W83795_REG_VRLSB);
 510                 }
 511         }
 512
 513         /* Update pwm output */
 514         for (i = 0; i < data->has_pwm; i++) {
 515                 data->pwm[i][PWM_OUTPUT] =
 516                     w83795_read(client, W83795_REG_PWM(i, PWM_OUTPUT));
 517         }
 518
 519         /* update alarm */
 520         for (i = 0; i < ARRAY_SIZE(data->alarms); i++)
 521                 data->alarms[i] = w83795_read(client, W83795_REG_ALARM(i));
 522
 523         data->last_updated = jiffies;
 524         data->valid = 1;
 525
 526 END:
 527         mutex_unlock(&data->update_lock);
 528         return data;
 529 }
 530
 531 /*
 532  * Sysfs attributes
 533  */
 534
 535 #define ALARM_STATUS      0
 536 #define BEEP_ENABLE       1
 537 static ssize_t
 538 show_alarm_beep(struct device *dev, struct device_attribute *attr, char *buf)
 539 {
 540         struct w83795_data *data = w83795_update_device(dev);
 541         struct sensor_device_attribute_2 *sensor_attr =
 542             to_sensor_dev_attr_2(attr);
 543         int nr = sensor_attr->nr;
 544         int index = sensor_attr->index >> 3;
 545         int bit = sensor_attr->index & 0x07;
 546         u8 val;
 547
 548         if (ALARM_STATUS == nr) {
 549                 val = (data->alarms[index] >> (bit)) & 1;
 550         } else {                /* BEEP_ENABLE */
 551                 val = (data->beeps[index] >> (bit)) & 1;
 552         }
 553
 554         return sprintf(buf, "%u\n", val);
 555 }
 556
 557 static ssize_t
 558 store_beep(struct device *dev, struct device_attribute *attr,
 559            const char *buf, size_t count)
 560 {
 561         struct i2c_client *client = to_i2c_client(dev);
 562         struct w83795_data *data = i2c_get_clientdata(client);
 563         struct sensor_device_attribute_2 *sensor_attr =
 564             to_sensor_dev_attr_2(attr);
 565         int index = sensor_attr->index >> 3;
 566         int shift = sensor_attr->index & 0x07;
 567         u8 beep_bit = 1 << shift;
 568         unsigned long val;
 569
 570         if (strict_strtoul(buf, 10, &val) < 0)
 571                 return -EINVAL;
 572         if (val != 0 && val != 1)
 573                 return -EINVAL;
 574
 575         mutex_lock(&data->update_lock);
 576         data->beeps[index] = w83795_read(client, W83795_REG_BEEP(index));
 577         data->beeps[index] &= ~beep_bit;
 578         data->beeps[index] |= val << shift;
 579         w83795_write(client, W83795_REG_BEEP(index), data->beeps[index]);
 580         mutex_unlock(&data->update_lock);
 581
 582         return count;
 583 }
 584
 585 /* Write any value to clear chassis alarm */
 586 static ssize_t
 587 store_chassis_clear(struct device *dev,
 588                     struct device_attribute *attr, const char *buf,
 589                     size_t count)
 590 {
 591         struct i2c_client *client = to_i2c_client(dev);
 592         struct w83795_data *data = i2c_get_clientdata(client);
 593         u8 val;
 594
 595         mutex_lock(&data->update_lock);
 596         val = w83795_read(client, W83795_REG_CLR_CHASSIS);
 597         val |= 0x80;
 598         w83795_write(client, W83795_REG_CLR_CHASSIS, val);
 599         mutex_unlock(&data->update_lock);
 600         return count;
 601 }
 602
 603 #define FAN_INPUT     0
 604 #define FAN_MIN       1
 605 static ssize_t
 606 show_fan(struct device *dev, struct device_attribute *attr, char *buf)
 607 {
 608         struct sensor_device_attribute_2 *sensor_attr =
 609             to_sensor_dev_attr_2(attr);
 610         int nr = sensor_attr->nr;
 611         int index = sensor_attr->index;
 612         struct w83795_data *data = w83795_update_device(dev);
 613         u16 val;
 614
 615         if (FAN_INPUT == nr)
 616                 val = data->fan[index] & 0x0fff;
 617         else
 618                 val = data->fan_min[index] & 0x0fff;
 619
 620         return sprintf(buf, "%lu\n", fan_from_reg(val));
 621 }
 622
 623 static ssize_t
 624 store_fan_min(struct device *dev, struct device_attribute *attr,
 625               const char *buf, size_t count)
 626 {
 627         struct sensor_device_attribute_2 *sensor_attr =
 628             to_sensor_dev_attr_2(attr);
 629         int index = sensor_attr->index;
 630         struct i2c_client *client = to_i2c_client(dev);
 631         struct w83795_data *data = i2c_get_clientdata(client);
 632         unsigned long val;
 633
 634         if (strict_strtoul(buf, 10, &val))
 635                 return -EINVAL;
 636         val = fan_to_reg(val);
 637
 638         mutex_lock(&data->update_lock);
 639         data->fan_min[index] = val;
 640         w83795_write(client, W83795_REG_FAN_MIN_HL(index), (val >> 4) & 0xff);
 641         val &= 0x0f;
 642         if (index & 1) {
 643                 val <<= 4;
 644                 val |= w83795_read(client, W83795_REG_FAN_MIN_LSB(index))
 645                        & 0x0f;
 646         } else {
 647                 val |= w83795_read(client, W83795_REG_FAN_MIN_LSB(index))
 648                        & 0xf0;
 649         }
 650         w83795_write(client, W83795_REG_FAN_MIN_LSB(index), val & 0xff);
 651         mutex_unlock(&data->update_lock);
 652
 653         return count;
 654 }
 655
 656 static ssize_t
 657 show_pwm(struct device *dev, struct device_attribute *attr, char *buf)
 658 {
 659         struct w83795_data *data = w83795_update_device(dev);
 660         struct sensor_device_attribute_2 *sensor_attr =
 661             to_sensor_dev_attr_2(attr);
 662         int nr = sensor_attr->nr;
 663         int index = sensor_attr->index;
 664         unsigned int val;
 665
 666         switch (nr) {
 667         case PWM_STOP_TIME:
 668                 val = time_from_reg(data->pwm[index][nr]);
 669                 break;
 670         case PWM_FREQ:
 671                 val = pwm_freq_from_reg(data->pwm[index][nr], data->clkin);
 672                 break;
 673         default:
 674                 val = data->pwm[index][nr];
 675                 break;
 676         }
 677
 678         return sprintf(buf, "%u\n", val);
 679 }
 680
 681 static ssize_t
 682 store_pwm(struct device *dev, struct device_attribute *attr,
 683           const char *buf, size_t count)
 684 {
 685         struct i2c_client *client = to_i2c_client(dev);
 686         struct w83795_data *data = i2c_get_clientdata(client);
 687         struct sensor_device_attribute_2 *sensor_attr =
 688             to_sensor_dev_attr_2(attr);
 689         int nr = sensor_attr->nr;
 690         int index = sensor_attr->index;
 691         unsigned long val;
 692
 693         if (strict_strtoul(buf, 10, &val) < 0)
 694                 return -EINVAL;
 695
 696         mutex_lock(&data->update_lock);
 697         switch (nr) {
 698         case PWM_STOP_TIME:
 699                 val = time_to_reg(val);
 700                 break;
 701         case PWM_FREQ:
 702                 val = pwm_freq_to_reg(val, data->clkin);
 703                 break;
 704         default:
 705                 val = SENSORS_LIMIT(val, 0, 0xff);
 706                 break;
 707         }
 708         w83795_write(client, W83795_REG_PWM(index, nr), val);
 709         data->pwm[index][nr] = val;
 710         mutex_unlock(&data->update_lock);
 711         return count;
 712 }
 713
 714 static ssize_t
 715 show_pwm_enable(struct device *dev, struct device_attribute *attr, char *buf)
 716 {
 717         struct sensor_device_attribute_2 *sensor_attr =
 718             to_sensor_dev_attr_2(attr);
 719         struct i2c_client *client = to_i2c_client(dev);
 720         struct w83795_data *data = i2c_get_clientdata(client);
 721         int index = sensor_attr->index;
 722         u8 tmp;
 723
 724         if (1 == (data->pwm_fcms[0] & (1 << index))) {
 725                 tmp = 2;
 726                 goto out;
 727         }
 728         for (tmp = 0; tmp < 6; tmp++) {
 729                 if (data->pwm_tfmr[tmp] & (1 << index)) {
 730                         tmp = 3;
 731                         goto out;
 732                 }
 733         }
 734         if (data->pwm_fomc & (1 << index))
 735                 tmp = 0;
 736         else
 737                 tmp = 1;
 738
 739 out:
 740         return sprintf(buf, "%u\n", tmp);
 741 }
 742
 743 static ssize_t
 744 store_pwm_enable(struct device *dev, struct device_attribute *attr,
 745           const char *buf, size_t count)
 746 {
 747         struct i2c_client *client = to_i2c_client(dev);
 748         struct w83795_data *data = i2c_get_clientdata(client);
 749         struct sensor_device_attribute_2 *sensor_attr =
 750             to_sensor_dev_attr_2(attr);
 751         int index = sensor_attr->index;
 752         unsigned long val;
 753         int i;
 754
 755         if (strict_strtoul(buf, 10, &val) < 0)
 756                 return -EINVAL;
 757         if (val > 2)
 758                 return -EINVAL;
 759
 760         mutex_lock(&data->update_lock);
 761         switch (val) {
 762         case 0:
 763         case 1:
 764                 data->pwm_fcms[0] &= ~(1 << index);
 765                 w83795_write(client, W83795_REG_FCMS1, data->pwm_fcms[0]);
 766                 for (i = 0; i < 6; i++) {
 767                         data->pwm_tfmr[i] &= ~(1 << index);
 768                         w83795_write(client, W83795_REG_TFMR(i),
 769                                 data->pwm_tfmr[i]);
 770                 }
 771                 data->pwm_fomc |= 1 << index;
 772                 data->pwm_fomc ^= val << index;
 773                 w83795_write(client, W83795_REG_FOMC, data->pwm_fomc);
 774                 break;
 775         case 2:
 776                 data->pwm_fcms[0] |= (1 << index);
 777                 w83795_write(client, W83795_REG_FCMS1, data->pwm_fcms[0]);
 778                 break;
 779         }
 780         mutex_unlock(&data->update_lock);
 781         return count;
 782 }
 783
 784 static ssize_t
 785 show_temp_src(struct device *dev, struct device_attribute *attr, char *buf)
 786 {
 787         struct sensor_device_attribute_2 *sensor_attr =
 788             to_sensor_dev_attr_2(attr);
 789         struct i2c_client *client = to_i2c_client(dev);
 790         struct w83795_data *data = i2c_get_clientdata(client);
 791         int index = sensor_attr->index;
 792         u8 val = index / 2;
 793         u8 tmp = data->temp_src[val];
 794
 795         if (index & 1)
 796                 val = 4;
 797         else
 798                 val = 0;
 799         tmp >>= val;
 800         tmp &= 0x0f;
 801
 802         return sprintf(buf, "%u\n", tmp);
 803 }
 804
 805 static ssize_t
 806 store_temp_src(struct device *dev, struct device_attribute *attr,
 807           const char *buf, size_t count)
 808 {
 809         struct i2c_client *client = to_i2c_client(dev);
 810         struct w83795_data *data = i2c_get_clientdata(client);
 811         struct sensor_device_attribute_2 *sensor_attr =
 812             to_sensor_dev_attr_2(attr);
 813         int index = sensor_attr->index;
 814         unsigned long tmp;
 815         u8 val = index / 2;
 816
 817         if (strict_strtoul(buf, 10, &tmp) < 0)
 818                 return -EINVAL;
 819         tmp = SENSORS_LIMIT(tmp, 0, 15);
 820
 821         mutex_lock(&data->update_lock);
 822         if (index & 1) {
 823                 tmp <<= 4;
 824                 data->temp_src[val] &= 0x0f;
 825         } else {
 826                 data->temp_src[val] &= 0xf0;
 827         }
 828         data->temp_src[val] |= tmp;
 829         w83795_write(client, W83795_REG_TSS(val), data->temp_src[val]);
 830         mutex_unlock(&data->update_lock);
 831
 832         return count;
 833 }
 834
 835 #define TEMP_PWM_ENABLE   0
 836 #define TEMP_PWM_FAN_MAP  1
 837 static ssize_t
 838 show_temp_pwm_enable(struct device *dev, struct device_attribute *attr,
 839                      char *buf)
 840 {
 841         struct i2c_client *client = to_i2c_client(dev);
 842         struct w83795_data *data = i2c_get_clientdata(client);
 843         struct sensor_device_attribute_2 *sensor_attr =
 844             to_sensor_dev_attr_2(attr);
 845         int nr = sensor_attr->nr;
 846         int index = sensor_attr->index;
 847         u8 tmp = 0xff;
 848
 849         switch (nr) {
 850         case TEMP_PWM_ENABLE:
 851                 tmp = (data->pwm_fcms[1] >> index) & 1;
 852                 if (tmp)
 853                         tmp = 4;
 854                 else
 855                         tmp = 3;
 856                 break;
 857         case TEMP_PWM_FAN_MAP:
 858                 tmp = data->pwm_tfmr[index];
 859                 break;
 860         }
 861
 862         return sprintf(buf, "%u\n", tmp);
 863 }
 864
 865 static ssize_t
 866 store_temp_pwm_enable(struct device *dev, struct device_attribute *attr,
 867           const char *buf, size_t count)
 868 {
 869         struct i2c_client *client = to_i2c_client(dev);
 870         struct w83795_data *data = i2c_get_clientdata(client);
 871         struct sensor_device_attribute_2 *sensor_attr =
 872             to_sensor_dev_attr_2(attr);
 873         int nr = sensor_attr->nr;
 874         int index = sensor_attr->index;
 875         unsigned long tmp;
 876
 877         if (strict_strtoul(buf, 10, &tmp) < 0)
 878                 return -EINVAL;
 879
 880         switch (nr) {
 881         case TEMP_PWM_ENABLE:
 882                 if ((tmp != 3) && (tmp != 4))
 883                         return -EINVAL;
 884                 tmp -= 3;
 885                 mutex_lock(&data->update_lock);
 886                 data->pwm_fcms[1] &= ~(1 << index);
 887                 data->pwm_fcms[1] |= tmp << index;
 888                 w83795_write(client, W83795_REG_FCMS2, data->pwm_fcms[1]);
 889                 mutex_unlock(&data->update_lock);
 890                 break;
 891         case TEMP_PWM_FAN_MAP:
 892                 mutex_lock(&data->update_lock);
 893                 tmp = SENSORS_LIMIT(tmp, 0, 0xff);
 894                 w83795_write(client, W83795_REG_TFMR(index), tmp);
 895                 data->pwm_tfmr[index] = tmp;
 896                 mutex_unlock(&data->update_lock);
 897                 break;
 898         }
 899         return count;
 900 }
 901
 902 #define FANIN_TARGET   0
 903 #define FANIN_TOL      1
 904 static ssize_t
 905 show_fanin(struct device *dev, struct device_attribute *attr, char *buf)
 906 {
 907         struct i2c_client *client = to_i2c_client(dev);
 908         struct w83795_data *data = i2c_get_clientdata(client);
 909         struct sensor_device_attribute_2 *sensor_attr =
 910             to_sensor_dev_attr_2(attr);
 911         int nr = sensor_attr->nr;
 912         int index = sensor_attr->index;
 913         u16 tmp = 0;
 914
 915         switch (nr) {
 916         case FANIN_TARGET:
 917                 tmp = fan_from_reg(data->target_speed[index]);
 918                 break;
 919         case FANIN_TOL:
 920                 tmp = data->tol_speed;
 921                 break;
 922         }
 923
 924         return sprintf(buf, "%u\n", tmp);
 925 }
 926
 927 static ssize_t
 928 store_fanin(struct device *dev, struct device_attribute *attr,
 929           const char *buf, size_t count)
 930 {
 931         struct i2c_client *client = to_i2c_client(dev);
 932         struct w83795_data *data = i2c_get_clientdata(client);
 933         struct sensor_device_attribute_2 *sensor_attr =
 934             to_sensor_dev_attr_2(attr);
 935         int nr = sensor_attr->nr;
 936         int index = sensor_attr->index;
 937         unsigned long val;
 938
 939         if (strict_strtoul(buf, 10, &val) < 0)
 940                 return -EINVAL;
 941
 942         mutex_lock(&data->update_lock);
 943         switch (nr) {
 944         case FANIN_TARGET:
 945                 val = fan_to_reg(SENSORS_LIMIT(val, 0, 0xfff));
 946                 w83795_write(client, W83795_REG_FTSH(index), (val >> 4) & 0xff);
 947                 w83795_write(client, W83795_REG_FTSL(index), (val << 4) & 0xf0);
 948                 data->target_speed[index] = val;
 949                 break;
 950         case FANIN_TOL:
 951                 val = SENSORS_LIMIT(val, 0, 0x3f);
 952                 w83795_write(client, W83795_REG_TFTS, val);
 953                 data->tol_speed = val;
 954                 break;
 955         }
 956         mutex_unlock(&data->update_lock);
 957
 958         return count;
 959 }
 960
 961
 962 static ssize_t
 963 show_temp_pwm(struct device *dev, struct device_attribute *attr, char *buf)
 964 {
 965         struct i2c_client *client = to_i2c_client(dev);
 966         struct w83795_data *data = i2c_get_clientdata(client);
 967         struct sensor_device_attribute_2 *sensor_attr =
 968             to_sensor_dev_attr_2(attr);
 969         int nr = sensor_attr->nr;
 970         int index = sensor_attr->index;
 971         long tmp = temp_from_reg(data->pwm_temp[index][nr]);
 972
 973         return sprintf(buf, "%ld\n", tmp);
 974 }
 975
 976 static ssize_t
 977 store_temp_pwm(struct device *dev, struct device_attribute *attr,
 978           const char *buf, size_t count)
 979 {
 980         struct i2c_client *client = to_i2c_client(dev);
 981         struct w83795_data *data = i2c_get_clientdata(client);
 982         struct sensor_device_attribute_2 *sensor_attr =
 983             to_sensor_dev_attr_2(attr);
 984         int nr = sensor_attr->nr;
 985         int index = sensor_attr->index;
 986         unsigned long val;
 987         u8 tmp;
 988
 989         if (strict_strtoul(buf, 10, &val) < 0)
 990                 return -EINVAL;
 991         val /= 1000;
 992
 993         mutex_lock(&data->update_lock);
 994         switch (nr) {
 995         case TEMP_PWM_TTTI:
 996                 val = SENSORS_LIMIT(val, 0, 0x7f);
 997                 w83795_write(client, W83795_REG_TTTI(index), val);
 998                 break;
 999         case TEMP_PWM_CTFS:
1000                 val = SENSORS_LIMIT(val, 0, 0x7f);
1001                 w83795_write(client, W83795_REG_CTFS(index), val);
1002                 break;
1003         case TEMP_PWM_HCT:
1004                 val = SENSORS_LIMIT(val, 0, 0x0f);
1005                 tmp = w83795_read(client, W83795_REG_HT(index));
1006                 tmp &= 0x0f;
1007                 tmp |= (val << 4) & 0xf0;
1008                 w83795_write(client, W83795_REG_HT(index), tmp);
1009                 break;
1010         case TEMP_PWM_HOT:
1011                 val = SENSORS_LIMIT(val, 0, 0x0f);
1012                 tmp = w83795_read(client, W83795_REG_HT(index));
1013                 tmp &= 0xf0;
1014                 tmp |= val & 0x0f;
1015                 w83795_write(client, W83795_REG_HT(index), tmp);
1016                 break;
1017         }
1018         data->pwm_temp[index][nr] = val;
1019         mutex_unlock(&data->update_lock);
1020
1021         return count;
1022 }
1023
1024 static ssize_t
1025 show_sf4_pwm(struct device *dev, struct device_attribute *attr, char *buf)
1026 {
1027         struct i2c_client *client = to_i2c_client(dev);
1028         struct w83795_data *data = i2c_get_clientdata(client);
1029         struct sensor_device_attribute_2 *sensor_attr =
1030             to_sensor_dev_attr_2(attr);
1031         int nr = sensor_attr->nr;
1032         int index = sensor_attr->index;
1033
1034         return sprintf(buf, "%u\n", data->sf4_reg[index][SF4_PWM][nr]);
1035 }
1036
1037 static ssize_t
1038 store_sf4_pwm(struct device *dev, struct device_attribute *attr,
1039           const char *buf, size_t count)
1040 {
1041         struct i2c_client *client = to_i2c_client(dev);
1042         struct w83795_data *data = i2c_get_clientdata(client);
1043         struct sensor_device_attribute_2 *sensor_attr =
1044             to_sensor_dev_attr_2(attr);
1045         int nr = sensor_attr->nr;
1046         int index = sensor_attr->index;
1047         unsigned long val;
1048
1049         if (strict_strtoul(buf, 10, &val) < 0)
1050                 return -EINVAL;
1051
1052         mutex_lock(&data->update_lock);
1053         w83795_write(client, W83795_REG_SF4_PWM(index, nr), val);
1054         data->sf4_reg[index][SF4_PWM][nr] = val;
1055         mutex_unlock(&data->update_lock);
1056
1057         return count;
1058 }
1059
1060 static ssize_t
1061 show_sf4_temp(struct device *dev, struct device_attribute *attr, char *buf)
1062 {
1063         struct i2c_client *client = to_i2c_client(dev);
1064         struct w83795_data *data = i2c_get_clientdata(client);
1065         struct sensor_device_attribute_2 *sensor_attr =
1066             to_sensor_dev_attr_2(attr);
1067         int nr = sensor_attr->nr;
1068         int index = sensor_attr->index;
1069
1070         return sprintf(buf, "%u\n",
1071                 (data->sf4_reg[index][SF4_TEMP][nr]) * 1000);
1072 }
1073
1074 static ssize_t
1075 store_sf4_temp(struct device *dev, struct device_attribute *attr,
1076           const char *buf, size_t count)
1077 {
1078         struct i2c_client *client = to_i2c_client(dev);
1079         struct w83795_data *data = i2c_get_clientdata(client);
1080         struct sensor_device_attribute_2 *sensor_attr =
1081             to_sensor_dev_attr_2(attr);
1082         int nr = sensor_attr->nr;
1083         int index = sensor_attr->index;
1084         unsigned long val;
1085
1086         if (strict_strtoul(buf, 10, &val) < 0)
1087                 return -EINVAL;
1088         val /= 1000;
1089
1090         mutex_lock(&data->update_lock);
1091         w83795_write(client, W83795_REG_SF4_TEMP(index, nr), val);
1092         data->sf4_reg[index][SF4_TEMP][nr] = val;
1093         mutex_unlock(&data->update_lock);
1094
1095         return count;
1096 }
1097
1098
1099 static ssize_t
1100 show_temp(struct device *dev, struct device_attribute *attr, char *buf)
1101 {
1102         struct sensor_device_attribute_2 *sensor_attr =
1103             to_sensor_dev_attr_2(attr);
1104         int nr = sensor_attr->nr;
1105         int index = sensor_attr->index;
1106         struct w83795_data *data = w83795_update_device(dev);
1107         long temp = temp_from_reg(data->temp[index][nr]);
1108
1109         if (TEMP_READ == nr)
1110                 temp += (data->temp_read_vrlsb[index] >> 6) * 250;
1111         return sprintf(buf, "%ld\n", temp);
1112 }
1113
1114 static ssize_t
1115 store_temp(struct device *dev, struct device_attribute *attr,
1116            const char *buf, size_t count)
1117 {
1118         struct sensor_device_attribute_2 *sensor_attr =
1119             to_sensor_dev_attr_2(attr);
1120         int nr = sensor_attr->nr;
1121         int index = sensor_attr->index;
1122         struct i2c_client *client = to_i2c_client(dev);
1123         struct w83795_data *data = i2c_get_clientdata(client);
1124         long tmp;
1125
1126         if (strict_strtol(buf, 10, &tmp) < 0)
1127                 return -EINVAL;
1128
1129         mutex_lock(&data->update_lock);
1130         data->temp[index][nr] = temp_to_reg(tmp, -128, 127);
1131         w83795_write(client, W83795_REG_TEMP[index][nr], data->temp[index][nr]);
1132         mutex_unlock(&data->update_lock);
1133         return count;
1134 }
1135
1136
1137 static ssize_t
1138 show_dts_mode(struct device *dev, struct device_attribute *attr, char *buf)
1139 {
1140         struct i2c_client *client = to_i2c_client(dev);
1141         struct w83795_data *data = i2c_get_clientdata(client);
1142         int tmp;
1143
1144         if (data->enable_dts & 2)
1145                 tmp = 5;
1146         else
1147                 tmp = 6;
1148
1149         return sprintf(buf, "%d\n", tmp);
1150 }
1151
1152 static ssize_t
1153 show_dts(struct device *dev, struct device_attribute *attr, char *buf)
1154 {
1155         struct sensor_device_attribute_2 *sensor_attr =
1156             to_sensor_dev_attr_2(attr);
1157         int index = sensor_attr->index;
1158         struct w83795_data *data = w83795_update_device(dev);
1159         long temp = temp_from_reg(data->dts[index]);
1160
1161         temp += (data->dts_read_vrlsb[index] >> 6) * 250;
1162         return sprintf(buf, "%ld\n", temp);
1163 }
1164
1165 static ssize_t
1166 show_dts_ext(struct device *dev, struct device_attribute *attr, char *buf)
1167 {
1168         struct sensor_device_attribute_2 *sensor_attr =
1169             to_sensor_dev_attr_2(attr);
1170         int nr = sensor_attr->nr;
1171         struct i2c_client *client = to_i2c_client(dev);
1172         struct w83795_data *data = i2c_get_clientdata(client);
1173         long temp = temp_from_reg(data->dts_ext[nr]);
1174
1175         return sprintf(buf, "%ld\n", temp);
1176 }
1177
1178 static ssize_t
1179 store_dts_ext(struct device *dev, struct device_attribute *attr,
1180            const char *buf, size_t count)
1181 {
1182         struct sensor_device_attribute_2 *sensor_attr =
1183             to_sensor_dev_attr_2(attr);
1184         int nr = sensor_attr->nr;
1185         struct i2c_client *client = to_i2c_client(dev);
1186         struct w83795_data *data = i2c_get_clientdata(client);
1187         long tmp;
1188
1189         if (strict_strtol(buf, 10, &tmp) < 0)
1190                 return -EINVAL;
1191
1192         mutex_lock(&data->update_lock);
1193         data->dts_ext[nr] = temp_to_reg(tmp, -128, 127);
1194         w83795_write(client, W83795_REG_DTS_EXT(nr), data->dts_ext[nr]);
1195         mutex_unlock(&data->update_lock);
1196         return count;
1197 }
1198
1199
1200 static ssize_t
1201 show_temp_mode(struct device *dev, struct device_attribute *attr, char *buf)
1202 {
1203         struct i2c_client *client = to_i2c_client(dev);
1204         struct w83795_data *data = i2c_get_clientdata(client);
1205         struct sensor_device_attribute_2 *sensor_attr =
1206             to_sensor_dev_attr_2(attr);
1207         int index = sensor_attr->index;
1208         int tmp;
1209
1210         if (data->temp_mode & (1 << index))
1211                 tmp = 3;        /* Thermal diode */
1212         else
1213                 tmp = 4;        /* Thermistor */
1214
1215         return sprintf(buf, "%d\n", tmp);
1216 }
1217
1218 /* Only for temp1-4 (temp5-6 can only be thermistor) */
1219 static ssize_t
1220 store_temp_mode(struct device *dev, struct device_attribute *attr,
1221                 const char *buf, size_t count)
1222 {
1223         struct i2c_client *client = to_i2c_client(dev);
1224         struct w83795_data *data = i2c_get_clientdata(client);
1225         struct sensor_device_attribute_2 *sensor_attr =
1226             to_sensor_dev_attr_2(attr);
1227         int index = sensor_attr->index;
1228         int reg_shift;
1229         unsigned long val;
1230         u8 tmp;
1231
1232         if (strict_strtoul(buf, 10, &val) < 0)
1233                 return -EINVAL;
1234         if ((val != 4) && (val != 3))
1235                 return -EINVAL;
1236
1237         mutex_lock(&data->update_lock);
1238         if (val == 3) {
1239                 /* Thermal diode */
1240                 val = 0x01;
1241                 data->temp_mode |= 1 << index;
1242         } else if (val == 4) {
1243                 /* Thermistor */
1244                 val = 0x03;
1245                 data->temp_mode &= ~(1 << index);
1246         }
1247
1248         reg_shift = 2 * index;
1249         tmp = w83795_read(client, W83795_REG_TEMP_CTRL2);
1250         tmp &= ~(0x03 << reg_shift);
1251         tmp |= val << reg_shift;
1252         w83795_write(client, W83795_REG_TEMP_CTRL2, tmp);
1253
1254         mutex_unlock(&data->update_lock);
1255         return count;
1256 }
1257
1258
1259 /* show/store VIN */
1260 static ssize_t
1261 show_in(struct device *dev, struct device_attribute *attr, char *buf)
1262 {
1263         struct sensor_device_attribute_2 *sensor_attr =
1264             to_sensor_dev_attr_2(attr);
1265         int nr = sensor_attr->nr;
1266         int index = sensor_attr->index;
1267         struct w83795_data *data = w83795_update_device(dev);
1268         u16 val = data->in[index][nr];
1269         u8 lsb_idx;
1270
1271         switch (nr) {
1272         case IN_READ:
1273                 /* calculate this value again by sensors as sensors3.conf */
1274                 if ((index >= 17) &&
1275                     !((data->has_gain >> (index - 17)) & 1))
1276                         val *= 8;
1277                 break;
1278         case IN_MAX:
1279         case IN_LOW:
1280                 lsb_idx = IN_LSB_SHIFT_IDX[index][IN_LSB_IDX];
1281                 val <<= 2;
1282                 val |= (data->in_lsb[lsb_idx][nr] >>
1283                         IN_LSB_SHIFT_IDX[lsb_idx][IN_LSB_SHIFT]) & 0x03;
1284                 if ((index >= 17) &&
1285                     !((data->has_gain >> (index - 17)) & 1))
1286                         val *= 8;
1287                 break;
1288         }
1289         val = in_from_reg(index, val);
1290
1291         return sprintf(buf, "%d\n", val);
1292 }
1293
1294 static ssize_t
1295 store_in(struct device *dev, struct device_attribute *attr,
1296          const char *buf, size_t count)
1297 {
1298         struct sensor_device_attribute_2 *sensor_attr =
1299             to_sensor_dev_attr_2(attr);
1300         int nr = sensor_attr->nr;
1301         int index = sensor_attr->index;
1302         struct i2c_client *client = to_i2c_client(dev);
1303         struct w83795_data *data = i2c_get_clientdata(client);
1304         unsigned long val;
1305         u8 tmp;
1306         u8 lsb_idx;
1307
1308         if (strict_strtoul(buf, 10, &val) < 0)
1309                 return -EINVAL;
1310         val = in_to_reg(index, val);
1311
1312         if ((index >= 17) &&
1313             !((data->has_gain >> (index - 17)) & 1))
1314                 val /= 8;
1315         val = SENSORS_LIMIT(val, 0, 0x3FF);
1316         mutex_lock(&data->update_lock);
1317
1318         lsb_idx = IN_LSB_SHIFT_IDX[index][IN_LSB_IDX];
1319         tmp = w83795_read(client, IN_LSB_REG(lsb_idx, nr));
1320         tmp &= ~(0x03 << IN_LSB_SHIFT_IDX[index][IN_LSB_SHIFT]);
1321         tmp |= (val & 0x03) << IN_LSB_SHIFT_IDX[index][IN_LSB_SHIFT];
1322         w83795_write(client, IN_LSB_REG(lsb_idx, nr), tmp);
1323         data->in_lsb[lsb_idx][nr] = tmp;
1324
1325         tmp = (val >> 2) & 0xff;
1326         w83795_write(client, W83795_REG_IN[index][nr], tmp);
1327         data->in[index][nr] = tmp;
1328
1329         mutex_unlock(&data->update_lock);
1330         return count;
1331 }
1332
1333
1334 static ssize_t
1335 show_sf_setup(struct device *dev, struct device_attribute *attr, char *buf)
1336 {
1337         struct sensor_device_attribute_2 *sensor_attr =
1338             to_sensor_dev_attr_2(attr);
1339         int nr = sensor_attr->nr;
1340         struct i2c_client *client = to_i2c_client(dev);
1341         struct w83795_data *data = i2c_get_clientdata(client);
1342         u16 val = data->setup_pwm[nr];
1343
1344         switch (nr) {
1345         case SETUP_PWM_UPTIME:
1346         case SETUP_PWM_DOWNTIME:
1347                 val = time_from_reg(val);
1348                 break;
1349         }
1350
1351         return sprintf(buf, "%d\n", val);
1352 }
1353
1354 static ssize_t
1355 store_sf_setup(struct device *dev, struct device_attribute *attr,
1356          const char *buf, size_t count)
1357 {
1358         struct sensor_device_attribute_2 *sensor_attr =
1359             to_sensor_dev_attr_2(attr);
1360         int nr = sensor_attr->nr;
1361         struct i2c_client *client = to_i2c_client(dev);
1362         struct w83795_data *data = i2c_get_clientdata(client);
1363         unsigned long val;
1364
1365         if (strict_strtoul(buf, 10, &val) < 0)
1366                 return -EINVAL;
1367
1368         switch (nr) {
1369         case SETUP_PWM_DEFAULT:
1370                 val = SENSORS_LIMIT(val, 0, 0xff);
1371                 break;
1372         case SETUP_PWM_UPTIME:
1373         case SETUP_PWM_DOWNTIME:
1374                 val = time_to_reg(val);
1375                 if (val == 0)
1376                         return -EINVAL;
1377                 break;
1378         }
1379
1380         mutex_lock(&data->update_lock);
1381         data->setup_pwm[nr] = val;
1382         w83795_write(client, W83795_REG_SETUP_PWM(nr), val);
1383         mutex_unlock(&data->update_lock);
1384         return count;
1385 }
1386
1387
1388 #define NOT_USED                        -1
1389
1390 /* Don't change the attribute order, _max and _min are accessed by index
1391  * somewhere else in the code */
1392 #define SENSOR_ATTR_IN(index) {                                         \
1393         SENSOR_ATTR_2(in##index##_input, S_IRUGO, show_in, NULL,        \
1394                 IN_READ, index), \
1395         SENSOR_ATTR_2(in##index##_max, S_IRUGO | S_IWUSR, show_in,      \
1396                 store_in, IN_MAX, index),                               \
1397         SENSOR_ATTR_2(in##index##_min, S_IRUGO | S_IWUSR, show_in,      \
1398                 store_in, IN_LOW, index),                               \
1399         SENSOR_ATTR_2(in##index##_alarm, S_IRUGO, show_alarm_beep,      \
1400                 NULL, ALARM_STATUS, index + ((index > 14) ? 1 : 0)), \
1401         SENSOR_ATTR_2(in##index##_beep, S_IWUSR | S_IRUGO,              \
1402                 show_alarm_beep, store_beep, BEEP_ENABLE,               \
1403                 index + ((index > 14) ? 1 : 0)) }
1404
1405 #define SENSOR_ATTR_FAN(index) {                                        \
1406         SENSOR_ATTR_2(fan##index##_input, S_IRUGO, show_fan,            \
1407                 NULL, FAN_INPUT, index - 1), \
1408         SENSOR_ATTR_2(fan##index##_min, S_IWUSR | S_IRUGO,              \
1409                 show_fan, store_fan_min, FAN_MIN, index - 1),   \
1410         SENSOR_ATTR_2(fan##index##_alarm, S_IRUGO, show_alarm_beep,     \
1411                 NULL, ALARM_STATUS, index + 31),                        \
1412         SENSOR_ATTR_2(fan##index##_beep, S_IWUSR | S_IRUGO,             \
1413                 show_alarm_beep, store_beep, BEEP_ENABLE, index + 31) }
1414
1415 #define SENSOR_ATTR_PWM(index) {                                        \
1416         SENSOR_ATTR_2(pwm##index, S_IWUSR | S_IRUGO, show_pwm,          \
1417                 store_pwm, PWM_OUTPUT, index - 1),                      \
1418         SENSOR_ATTR_2(pwm##index##_nonstop, S_IWUSR | S_IRUGO,          \
1419                 show_pwm, store_pwm, PWM_NONSTOP, index - 1),           \
1420         SENSOR_ATTR_2(pwm##index##_start, S_IWUSR | S_IRUGO,            \
1421                 show_pwm, store_pwm, PWM_START, index - 1),             \
1422         SENSOR_ATTR_2(pwm##index##_stop_time, S_IWUSR | S_IRUGO,        \
1423                 show_pwm, store_pwm, PWM_STOP_TIME, index - 1),  \
1424         SENSOR_ATTR_2(pwm##index##_freq, S_IWUSR | S_IRUGO,     \
1425                 show_pwm, store_pwm, PWM_FREQ, index - 1),       \
1426         SENSOR_ATTR_2(pwm##index##_enable, S_IWUSR | S_IRUGO,           \
1427                 show_pwm_enable, store_pwm_enable, NOT_USED, index - 1), \
1428         SENSOR_ATTR_2(fan##index##_target, S_IWUSR | S_IRUGO, \
1429                 show_fanin, store_fanin, FANIN_TARGET, index - 1) }
1430
1431 #define SENSOR_ATTR_DTS(index) {                                        \
1432         SENSOR_ATTR_2(temp##index##_type, S_IRUGO ,             \
1433                 show_dts_mode, NULL, NOT_USED, index - 7),      \
1434         SENSOR_ATTR_2(temp##index##_input, S_IRUGO, show_dts,           \
1435                 NULL, NOT_USED, index - 7),                             \
1436         SENSOR_ATTR_2(temp##index##_crit, S_IRUGO | S_IWUSR, show_dts_ext, \
1437                 store_dts_ext, DTS_CRIT, NOT_USED),                     \
1438         SENSOR_ATTR_2(temp##index##_crit_hyst, S_IRUGO | S_IWUSR,       \
1439                 show_dts_ext, store_dts_ext, DTS_CRIT_HYST, NOT_USED),  \
1440         SENSOR_ATTR_2(temp##index##_max, S_IRUGO | S_IWUSR, show_dts_ext, \
1441                 store_dts_ext, DTS_WARN, NOT_USED),                     \
1442         SENSOR_ATTR_2(temp##index##_max_hyst, S_IRUGO | S_IWUSR,        \
1443                 show_dts_ext, store_dts_ext, DTS_WARN_HYST, NOT_USED),  \
1444         SENSOR_ATTR_2(temp##index##_alarm, S_IRUGO,                     \
1445                 show_alarm_beep, NULL, ALARM_STATUS, index + 17),       \
1446         SENSOR_ATTR_2(temp##index##_beep, S_IWUSR | S_IRUGO,            \
1447                 show_alarm_beep, store_beep, BEEP_ENABLE, index + 17) }
1448
1449 #define SENSOR_ATTR_TEMP(index) {                                       \
1450         SENSOR_ATTR_2(temp##index##_type, S_IRUGO | (index < 4 ? S_IWUSR : 0), \
1451                 show_temp_mode, store_temp_mode, NOT_USED, index - 1),  \
1452         SENSOR_ATTR_2(temp##index##_input, S_IRUGO, show_temp,          \
1453                 NULL, TEMP_READ, index - 1),                            \
1454         SENSOR_ATTR_2(temp##index##_crit, S_IRUGO | S_IWUSR, show_temp, \
1455                 store_temp, TEMP_CRIT, index - 1),                      \
1456         SENSOR_ATTR_2(temp##index##_crit_hyst, S_IRUGO | S_IWUSR,       \
1457                 show_temp, store_temp, TEMP_CRIT_HYST, index - 1),      \
1458         SENSOR_ATTR_2(temp##index##_max, S_IRUGO | S_IWUSR, show_temp,  \
1459                 store_temp, TEMP_WARN, index - 1),                      \
1460         SENSOR_ATTR_2(temp##index##_max_hyst, S_IRUGO | S_IWUSR,        \
1461                 show_temp, store_temp, TEMP_WARN_HYST, index - 1),      \
1462         SENSOR_ATTR_2(temp##index##_alarm, S_IRUGO,                     \
1463                 show_alarm_beep, NULL, ALARM_STATUS,                    \
1464                 index + (index > 4 ? 11 : 17)),                         \
1465         SENSOR_ATTR_2(temp##index##_beep, S_IWUSR | S_IRUGO,            \
1466                 show_alarm_beep, store_beep, BEEP_ENABLE,               \
1467                 index + (index > 4 ? 11 : 17)),                         \
1468         SENSOR_ATTR_2(temp##index##_source_sel, S_IWUSR | S_IRUGO,      \
1469                 show_temp_src, store_temp_src, NOT_USED, index - 1),    \
1470         SENSOR_ATTR_2(temp##index##_pwm_enable, S_IWUSR | S_IRUGO,      \
1471                 show_temp_pwm_enable, store_temp_pwm_enable,            \
1472                 TEMP_PWM_ENABLE, index - 1),                            \
1473         SENSOR_ATTR_2(temp##index##_auto_channels_pwm, S_IWUSR | S_IRUGO, \
1474                 show_temp_pwm_enable, store_temp_pwm_enable,            \
1475                 TEMP_PWM_FAN_MAP, index - 1),                           \
1476         SENSOR_ATTR_2(thermal_cruise##index, S_IWUSR | S_IRUGO,         \
1477                 show_temp_pwm, store_temp_pwm, TEMP_PWM_TTTI, index - 1), \
1478         SENSOR_ATTR_2(temp##index##_warn, S_IWUSR | S_IRUGO,            \
1479                 show_temp_pwm, store_temp_pwm, TEMP_PWM_CTFS, index - 1), \
1480         SENSOR_ATTR_2(temp##index##_warn_hyst, S_IWUSR | S_IRUGO,       \
1481                 show_temp_pwm, store_temp_pwm, TEMP_PWM_HCT, index - 1), \
1482         SENSOR_ATTR_2(temp##index##_operation_hyst, S_IWUSR | S_IRUGO,  \
1483                 show_temp_pwm, store_temp_pwm, TEMP_PWM_HOT, index - 1), \
1484         SENSOR_ATTR_2(temp##index##_auto_point1_pwm, S_IRUGO | S_IWUSR, \
1485                 show_sf4_pwm, store_sf4_pwm, 0, index - 1),             \
1486         SENSOR_ATTR_2(temp##index##_auto_point2_pwm, S_IRUGO | S_IWUSR, \
1487                 show_sf4_pwm, store_sf4_pwm, 1, index - 1),             \
1488         SENSOR_ATTR_2(temp##index##_auto_point3_pwm, S_IRUGO | S_IWUSR, \
1489                 show_sf4_pwm, store_sf4_pwm, 2, index - 1),             \
1490         SENSOR_ATTR_2(temp##index##_auto_point4_pwm, S_IRUGO | S_IWUSR, \
1491                 show_sf4_pwm, store_sf4_pwm, 3, index - 1),             \
1492         SENSOR_ATTR_2(temp##index##_auto_point5_pwm, S_IRUGO | S_IWUSR, \
1493                 show_sf4_pwm, store_sf4_pwm, 4, index - 1),             \
1494         SENSOR_ATTR_2(temp##index##_auto_point6_pwm, S_IRUGO | S_IWUSR, \
1495                 show_sf4_pwm, store_sf4_pwm, 5, index - 1),             \
1496         SENSOR_ATTR_2(temp##index##_auto_point7_pwm, S_IRUGO | S_IWUSR, \
1497                 show_sf4_pwm, store_sf4_pwm, 6, index - 1),             \
1498         SENSOR_ATTR_2(temp##index##_auto_point1_temp, S_IRUGO | S_IWUSR,\
1499                 show_sf4_temp, store_sf4_temp, 0, index - 1),           \
1500         SENSOR_ATTR_2(temp##index##_auto_point2_temp, S_IRUGO | S_IWUSR,\
1501                 show_sf4_temp, store_sf4_temp, 1, index - 1),           \
1502         SENSOR_ATTR_2(temp##index##_auto_point3_temp, S_IRUGO | S_IWUSR,\
1503                 show_sf4_temp, store_sf4_temp, 2, index - 1),           \
1504         SENSOR_ATTR_2(temp##index##_auto_point4_temp, S_IRUGO | S_IWUSR,\
1505                 show_sf4_temp, store_sf4_temp, 3, index - 1),           \
1506         SENSOR_ATTR_2(temp##index##_auto_point5_temp, S_IRUGO | S_IWUSR,\
1507                 show_sf4_temp, store_sf4_temp, 4, index - 1),           \
1508         SENSOR_ATTR_2(temp##index##_auto_point6_temp, S_IRUGO | S_IWUSR,\
1509                 show_sf4_temp, store_sf4_temp, 5, index - 1),           \
1510         SENSOR_ATTR_2(temp##index##_auto_point7_temp, S_IRUGO | S_IWUSR,\
1511                 show_sf4_temp, store_sf4_temp, 6, index - 1) }
1512
1513
1514 static struct sensor_device_attribute_2 w83795_in[][5] = {
1515         SENSOR_ATTR_IN(0),
1516         SENSOR_ATTR_IN(1),
1517         SENSOR_ATTR_IN(2),
1518         SENSOR_ATTR_IN(3),
1519         SENSOR_ATTR_IN(4),
1520         SENSOR_ATTR_IN(5),
1521         SENSOR_ATTR_IN(6),
1522         SENSOR_ATTR_IN(7),
1523         SENSOR_ATTR_IN(8),
1524         SENSOR_ATTR_IN(9),
1525         SENSOR_ATTR_IN(10),
1526         SENSOR_ATTR_IN(11),
1527         SENSOR_ATTR_IN(12),
1528         SENSOR_ATTR_IN(13),
1529         SENSOR_ATTR_IN(14),
1530         SENSOR_ATTR_IN(15),
1531         SENSOR_ATTR_IN(16),
1532         SENSOR_ATTR_IN(17),
1533         SENSOR_ATTR_IN(18),
1534         SENSOR_ATTR_IN(19),
1535         SENSOR_ATTR_IN(20),
1536 };
1537
1538 static const struct sensor_device_attribute_2 w83795_fan[][4] = {
1539         SENSOR_ATTR_FAN(1),
1540         SENSOR_ATTR_FAN(2),
1541         SENSOR_ATTR_FAN(3),
1542         SENSOR_ATTR_FAN(4),
1543         SENSOR_ATTR_FAN(5),
1544         SENSOR_ATTR_FAN(6),
1545         SENSOR_ATTR_FAN(7),
1546         SENSOR_ATTR_FAN(8),
1547         SENSOR_ATTR_FAN(9),
1548         SENSOR_ATTR_FAN(10),
1549         SENSOR_ATTR_FAN(11),
1550         SENSOR_ATTR_FAN(12),
1551         SENSOR_ATTR_FAN(13),
1552         SENSOR_ATTR_FAN(14),
1553 };
1554
1555 static const struct sensor_device_attribute_2 w83795_temp[][29] = {
1556         SENSOR_ATTR_TEMP(1),
1557         SENSOR_ATTR_TEMP(2),
1558         SENSOR_ATTR_TEMP(3),
1559         SENSOR_ATTR_TEMP(4),
1560         SENSOR_ATTR_TEMP(5),
1561         SENSOR_ATTR_TEMP(6),
1562 };
1563
1564 static const struct sensor_device_attribute_2 w83795_dts[][8] = {
1565         SENSOR_ATTR_DTS(7),
1566         SENSOR_ATTR_DTS(8),
1567         SENSOR_ATTR_DTS(9),
1568         SENSOR_ATTR_DTS(10),
1569         SENSOR_ATTR_DTS(11),
1570         SENSOR_ATTR_DTS(12),
1571         SENSOR_ATTR_DTS(13),
1572         SENSOR_ATTR_DTS(14),
1573 };
1574
1575 static const struct sensor_device_attribute_2 w83795_pwm[][7] = {
1576         SENSOR_ATTR_PWM(1),
1577         SENSOR_ATTR_PWM(2),
1578         SENSOR_ATTR_PWM(3),
1579         SENSOR_ATTR_PWM(4),
1580         SENSOR_ATTR_PWM(5),
1581         SENSOR_ATTR_PWM(6),
1582         SENSOR_ATTR_PWM(7),
1583         SENSOR_ATTR_PWM(8),
1584 };
1585
1586 static const struct sensor_device_attribute_2 sda_single_files[] = {
1587         SENSOR_ATTR_2(chassis, S_IWUSR | S_IRUGO, show_alarm_beep,
1588                       store_chassis_clear, ALARM_STATUS, 46),
1589         SENSOR_ATTR_2(beep_enable, S_IWUSR | S_IRUGO, show_alarm_beep,
1590                       store_beep, BEEP_ENABLE, 47),
1591         SENSOR_ATTR_2(speed_cruise_tolerance, S_IWUSR | S_IRUGO, show_fanin,
1592                 store_fanin, FANIN_TOL, NOT_USED),
1593         SENSOR_ATTR_2(pwm_default, S_IWUSR | S_IRUGO, show_sf_setup,
1594                       store_sf_setup, SETUP_PWM_DEFAULT, NOT_USED),
1595         SENSOR_ATTR_2(pwm_uptime, S_IWUSR | S_IRUGO, show_sf_setup,
1596                       store_sf_setup, SETUP_PWM_UPTIME, NOT_USED),
1597         SENSOR_ATTR_2(pwm_downtime, S_IWUSR | S_IRUGO, show_sf_setup,
1598                       store_sf_setup, SETUP_PWM_DOWNTIME, NOT_USED),
1599 };
1600
1601 /*
1602  * Driver interface
1603  */
1604
1605 static void w83795_init_client(struct i2c_client *client)
1606 {
1607         struct w83795_data *data = i2c_get_clientdata(client);
1608         static const u16 clkin[4] = {   /* in kHz */
1609                 14318, 24000, 33333, 48000
1610         };
1611         u8 config;
1612
1613         if (reset)
1614                 w83795_write(client, W83795_REG_CONFIG, 0x80);
1615
1616         /* Start monitoring if needed */
1617         config = w83795_read(client, W83795_REG_CONFIG);
1618         if (!(config & W83795_REG_CONFIG_START)) {
1619                 dev_info(&client->dev, "Enabling monitoring operations\n");
1620                 w83795_write(client, W83795_REG_CONFIG,
1621                              config | W83795_REG_CONFIG_START);
1622         }
1623
1624         data->clkin = clkin[(config >> 3) & 0x3];
1625         dev_dbg(&client->dev, "clkin = %u kHz\n", data->clkin);
1626 }
1627
1628 static int w83795_get_device_id(struct i2c_client *client)
1629 {
1630         int device_id;
1631
1632         device_id = i2c_smbus_read_byte_data(client, W83795_REG_DEVICEID);
1633
1634         /* Special case for rev. A chips; can't be checked first because later
1635            revisions emulate this for compatibility */
1636         if (device_id < 0 || (device_id & 0xf0) != 0x50) {
1637                 int alt_id;
1638
1639                 alt_id = i2c_smbus_read_byte_data(client,
1640                                                   W83795_REG_DEVICEID_A);
1641                 if (alt_id == 0x50)
1642                         device_id = alt_id;
1643         }
1644
1645         return device_id;
1646 }
1647
1648 /* Return 0 if detection is successful, -ENODEV otherwise */
1649 static int w83795_detect(struct i2c_client *client,
1650                          struct i2c_board_info *info)
1651 {
1652         int bank, vendor_id, device_id, expected, i2c_addr, config;
1653         struct i2c_adapter *adapter = client->adapter;
1654         unsigned short address = client->addr;
1655         const char *chip_name;
1656
1657         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1658                 return -ENODEV;
1659         bank = i2c_smbus_read_byte_data(client, W83795_REG_BANKSEL);
1660         if (bank < 0 || (bank & 0x7c)) {
1661                 dev_dbg(&adapter->dev,
1662                         "w83795: Detection failed at addr 0x%02hx, check %s\n",
1663                         address, "bank");
1664                 return -ENODEV;
1665         }
1666
1667         /* Check Nuvoton vendor ID */
1668         vendor_id = i2c_smbus_read_byte_data(client, W83795_REG_VENDORID);
1669         expected = bank & 0x80 ? 0x5c : 0xa3;
1670         if (vendor_id != expected) {
1671                 dev_dbg(&adapter->dev,
1672                         "w83795: Detection failed at addr 0x%02hx, check %s\n",
1673                         address, "vendor id");
1674                 return -ENODEV;
1675         }
1676
1677         /* Check device ID */
1678         device_id = w83795_get_device_id(client) |
1679                     (i2c_smbus_read_byte_data(client, W83795_REG_CHIPID) << 8);
1680         if ((device_id >> 4) != 0x795) {
1681                 dev_dbg(&adapter->dev,
1682                         "w83795: Detection failed at addr 0x%02hx, check %s\n",
1683                         address, "device id\n");
1684                 return -ENODEV;
1685         }
1686
1687         /* If Nuvoton chip, address of chip and W83795_REG_I2C_ADDR
1688            should match */
1689         if ((bank & 0x07) == 0) {
1690                 i2c_addr = i2c_smbus_read_byte_data(client,
1691                                                     W83795_REG_I2C_ADDR);
1692                 if ((i2c_addr & 0x7f) != address) {
1693                         dev_dbg(&adapter->dev,
1694                                 "w83795: Detection failed at addr 0x%02hx, "
1695                                 "check %s\n", address, "i2c addr");
1696                         return -ENODEV;
1697                 }
1698         }
1699
1700         /* Check 795 chip type: 795G or 795ADG
1701            Usually we don't write to chips during detection, but here we don't
1702            quite have the choice; hopefully it's OK, we are about to return
1703            success anyway */
1704         if ((bank & 0x07) != 0)
1705                 i2c_smbus_write_byte_data(client, W83795_REG_BANKSEL,
1706                                           bank & ~0x07);
1707         config = i2c_smbus_read_byte_data(client, W83795_REG_CONFIG);
1708         if (config & W83795_REG_CONFIG_CONFIG48)
1709                 chip_name = "w83795adg";
1710         else
1711                 chip_name = "w83795g";
1712
1713         strlcpy(info->type, chip_name, I2C_NAME_SIZE);
1714         dev_info(&adapter->dev, "Found %s rev. %c at 0x%02hx\n", chip_name,
1715                  'A' + (device_id & 0xf), address);
1716
1717         return 0;
1718 }
1719
1720 static int w83795_handle_files(struct device *dev, int (*fn)(struct device *,
1721                                const struct device_attribute *))
1722 {
1723         struct w83795_data *data = dev_get_drvdata(dev);
1724         int err, i, j;
1725
1726         for (i = 0; i < ARRAY_SIZE(w83795_in); i++) {
1727                 if (!(data->has_in & (1 << i)))
1728                         continue;
1729                 for (j = 0; j < ARRAY_SIZE(w83795_in[0]); j++) {
1730                         err = fn(dev, &w83795_in[i][j].dev_attr);
1731                         if (err)
1732                                 return err;
1733                 }
1734         }
1735
1736         for (i = 0; i < ARRAY_SIZE(w83795_fan); i++) {
1737                 if (!(data->has_fan & (1 << i)))
1738                         continue;
1739                 for (j = 0; j < ARRAY_SIZE(w83795_fan[0]); j++) {
1740                         err = fn(dev, &w83795_fan[i][j].dev_attr);
1741                         if (err)
1742                                 return err;
1743                 }
1744         }
1745
1746         for (i = 0; i < ARRAY_SIZE(sda_single_files); i++) {
1747                 err = fn(dev, &sda_single_files[i].dev_attr);
1748                 if (err)
1749                         return err;
1750         }
1751
1752         for (i = 0; i < data->has_pwm; i++) {
1753                 for (j = 0; j < ARRAY_SIZE(w83795_pwm[0]); j++) {
1754                         err = fn(dev, &w83795_pwm[i][j].dev_attr);
1755                         if (err)
1756                                 return err;
1757                 }
1758         }
1759
1760         for (i = 0; i < ARRAY_SIZE(w83795_temp); i++) {
1761                 if (!(data->has_temp & (1 << i)))
1762                         continue;
1763                 for (j = 0; j < ARRAY_SIZE(w83795_temp[0]); j++) {
1764                         err = fn(dev, &w83795_temp[i][j].dev_attr);
1765                         if (err)
1766                                 return err;
1767                 }
1768         }
1769
1770         if (data->enable_dts != 0) {
1771                 for (i = 0; i < ARRAY_SIZE(w83795_dts); i++) {
1772                         if (!(data->has_dts & (1 << i)))
1773                                 continue;
1774                         for (j = 0; j < ARRAY_SIZE(w83795_dts[0]); j++) {
1775                                 err = fn(dev, &w83795_dts[i][j].dev_attr);
1776                                 if (err)
1777                                         return err;
1778                         }
1779                 }
1780         }
1781
1782         return 0;
1783 }
1784
1785 /* We need a wrapper that fits in w83795_handle_files */
1786 static int device_remove_file_wrapper(struct device *dev,
1787                                       const struct device_attribute *attr)
1788 {
1789         device_remove_file(dev, attr);
1790         return 0;
1791 }
1792
1793 static void w83795_check_dynamic_in_limits(struct i2c_client *client)
1794 {
1795         struct w83795_data *data = i2c_get_clientdata(client);
1796         u8 vid_ctl;
1797         int i, err_max, err_min;
1798
1799         vid_ctl = w83795_read(client, W83795_REG_VID_CTRL);
1800
1801         /* Return immediately if VRM isn't configured */
1802         if ((vid_ctl & 0x07) == 0x00 || (vid_ctl & 0x07) == 0x07)
1803                 return;
1804
1805         data->has_dyn_in = (vid_ctl >> 3) & 0x07;
1806         for (i = 0; i < 2; i++) {
1807                 if (!(data->has_dyn_in & (1 << i)))
1808                         continue;
1809
1810                 /* Voltage limits in dynamic mode, switch to read-only */
1811                 err_max = sysfs_chmod_file(&client->dev.kobj,
1812                                            &w83795_in[i][2].dev_attr.attr,
1813                                            S_IRUGO);
1814                 err_min = sysfs_chmod_file(&client->dev.kobj,
1815                                            &w83795_in[i][3].dev_attr.attr,
1816                                            S_IRUGO);
1817                 if (err_max || err_min)
1818                         dev_warn(&client->dev, "Failed to set in%d limits "
1819                                  "read-only (%d, %d)\n", i, err_max, err_min);
1820                 else
1821                         dev_info(&client->dev, "in%d limits set dynamically "
1822                                  "from VID\n", i);
1823         }
1824 }
1825
1826 /* Check pins that can be used for either temperature or voltage monitoring */
1827 static void w83795_apply_temp_config(struct w83795_data *data, u8 config,
1828                                      int temp_chan, int in_chan)
1829 {
1830         /* config is a 2-bit value */
1831         switch (config) {
1832         case 0x2: /* Voltage monitoring */
1833                 data->has_in |= 1 << in_chan;
1834                 break;
1835         case 0x1: /* Thermal diode */
1836                 if (temp_chan >= 4)
1837                         break;
1838                 data->temp_mode |= 1 << temp_chan;
1839                 /* fall through */
1840         case 0x3: /* Thermistor */
1841                 data->has_temp |= 1 << temp_chan;
1842                 break;
1843         }
1844 }
1845
1846 static int w83795_probe(struct i2c_client *client,
1847                         const struct i2c_device_id *id)
1848 {
1849         int i;
1850         u8 tmp;
1851         struct device *dev = &client->dev;
1852         struct w83795_data *data;
1853         int err;
1854
1855         data = kzalloc(sizeof(struct w83795_data), GFP_KERNEL);
1856         if (!data) {
1857                 err = -ENOMEM;
1858                 goto exit;
1859         }
1860
1861         i2c_set_clientdata(client, data);
1862         data->chip_type = id->driver_data;
1863         data->bank = i2c_smbus_read_byte_data(client, W83795_REG_BANKSEL);
1864         mutex_init(&data->update_lock);
1865
1866         /* Initialize the chip */
1867         w83795_init_client(client);
1868
1869         /* Check which voltages and fans are present */
1870         data->has_in = w83795_read(client, W83795_REG_VOLT_CTRL1)
1871                      | (w83795_read(client, W83795_REG_VOLT_CTRL2) << 8);
1872         data->has_fan = w83795_read(client, W83795_REG_FANIN_CTRL1)
1873                       | (w83795_read(client, W83795_REG_FANIN_CTRL2) << 8);
1874
1875         /* Check which analog temperatures and extra voltages are present */
1876         tmp = w83795_read(client, W83795_REG_TEMP_CTRL1);
1877         if (tmp & 0x20)
1878                 data->enable_dts = 1;
1879         w83795_apply_temp_config(data, (tmp >> 2) & 0x3, 5, 16);
1880         w83795_apply_temp_config(data, tmp & 0x3, 4, 15);
1881         tmp = w83795_read(client, W83795_REG_TEMP_CTRL2);
1882         w83795_apply_temp_config(data, tmp >> 6, 3, 20);
1883         w83795_apply_temp_config(data, (tmp >> 4) & 0x3, 2, 19);
1884         w83795_apply_temp_config(data, (tmp >> 2) & 0x3, 1, 18);
1885         w83795_apply_temp_config(data, tmp & 0x3, 0, 17);
1886
1887         /* Check DTS enable status */
1888         if (data->enable_dts) {
1889                 if (1 & w83795_read(client, W83795_REG_DTSC))
1890                         data->enable_dts |= 2;
1891                 data->has_dts = w83795_read(client, W83795_REG_DTSE);
1892         }
1893
1894         /* Report PECI Tbase values */
1895         if (data->enable_dts == 1) {
1896                 for (i = 0; i < 8; i++) {
1897                         if (!(data->has_dts & (1 << i)))
1898                                 continue;
1899                         tmp = w83795_read(client, W83795_REG_PECI_TBASE(i));
1900                         dev_info(&client->dev,
1901                                  "PECI agent %d Tbase temperature: %u\n",
1902                                  i + 1, (unsigned int)tmp & 0x7f);
1903                 }
1904         }
1905
1906         /* Read the voltage limits */
1907         for (i = 0; i < ARRAY_SIZE(data->in); i++) {
1908                 if (!(data->has_in & (1 << i)))
1909                         continue;
1910                 data->in[i][IN_MAX] =
1911                         w83795_read(client, W83795_REG_IN[i][IN_MAX]);
1912                 data->in[i][IN_LOW] =
1913                         w83795_read(client, W83795_REG_IN[i][IN_LOW]);
1914         }
1915         for (i = 0; i < ARRAY_SIZE(data->in_lsb); i++) {
1916                 if ((i == 2 && data->chip_type == w83795adg) ||
1917                     (i >= 4 && !(data->has_in & (1 << (i + 11)))))
1918                         continue;
1919                 data->in_lsb[i][IN_MAX] =
1920                         w83795_read(client, IN_LSB_REG(i, IN_MAX));
1921                 data->in_lsb[i][IN_LOW] =
1922                         w83795_read(client, IN_LSB_REG(i, IN_LOW));
1923         }
1924         data->has_gain = w83795_read(client, W83795_REG_VMIGB_CTRL) & 0x0f;
1925
1926         /* Read the fan limits */
1927         for (i = 0; i < ARRAY_SIZE(data->fan); i++) {
1928                 /* Each register contains LSB for 2 fans, but we want to
1929                  * read it only once to save time */
1930                 if ((i & 1) == 0 && (data->has_fan & (3 << i)))
1931                         tmp = w83795_read(client, W83795_REG_FAN_MIN_LSB(i));
1932
1933                 if (!(data->has_fan & (1 << i)))
1934                         continue;
1935                 data->fan_min[i] =
1936                         w83795_read(client, W83795_REG_FAN_MIN_HL(i)) << 4;
1937                 data->fan_min[i] |=
1938                         (tmp >> W83795_REG_FAN_MIN_LSB_SHIFT(i)) & 0x0F;
1939         }
1940
1941         /* Read the temperature limits */
1942         for (i = 0; i < ARRAY_SIZE(data->temp); i++) {
1943                 if (!(data->has_temp & (1 << i)))
1944                         continue;
1945                 data->temp[i][TEMP_CRIT] =
1946                         w83795_read(client, W83795_REG_TEMP[i][TEMP_CRIT]);
1947                 data->temp[i][TEMP_CRIT_HYST] =
1948                         w83795_read(client, W83795_REG_TEMP[i][TEMP_CRIT_HYST]);
1949                 data->temp[i][TEMP_WARN] =
1950                         w83795_read(client, W83795_REG_TEMP[i][TEMP_WARN]);
1951                 data->temp[i][TEMP_WARN_HYST] =
1952                         w83795_read(client, W83795_REG_TEMP[i][TEMP_WARN_HYST]);
1953         }
1954
1955         /* Read the DTS limits */
1956         if (data->enable_dts != 0) {
1957                 data->dts_ext[DTS_CRIT] =
1958                         w83795_read(client, W83795_REG_DTS_EXT(DTS_CRIT));
1959                 data->dts_ext[DTS_CRIT_HYST] =
1960                         w83795_read(client, W83795_REG_DTS_EXT(DTS_CRIT_HYST));
1961                 data->dts_ext[DTS_WARN] =
1962                         w83795_read(client, W83795_REG_DTS_EXT(DTS_WARN));
1963                 data->dts_ext[DTS_WARN_HYST] =
1964                         w83795_read(client, W83795_REG_DTS_EXT(DTS_WARN_HYST));
1965         }
1966
1967         /* First update temp source selction */
1968         for (i = 0; i < 3; i++)
1969                 data->temp_src[i] = w83795_read(client, W83795_REG_TSS(i));
1970
1971         /* pwm and smart fan */
1972         if (data->chip_type == w83795g)
1973                 data->has_pwm = 8;
1974         else
1975                 data->has_pwm = 2;
1976         data->pwm_fcms[0] = w83795_read(client, W83795_REG_FCMS1);
1977         data->pwm_fcms[1] = w83795_read(client, W83795_REG_FCMS2);
1978         for (i = 0; i < ARRAY_SIZE(data->pwm_tfmr); i++)
1979                 data->pwm_tfmr[i] = w83795_read(client, W83795_REG_TFMR(i));
1980         data->pwm_fomc = w83795_read(client, W83795_REG_FOMC);
1981         for (i = 0; i < data->has_pwm; i++) {
1982                 for (tmp = PWM_START; tmp <= PWM_FREQ; tmp++)
1983                         data->pwm[i][tmp] =
1984                                 w83795_read(client, W83795_REG_PWM(i, tmp));
1985         }
1986         for (i = 0; i < 8; i++) {
1987                 data->target_speed[i] =
1988                         w83795_read(client, W83795_REG_FTSH(i)) << 4;
1989                 data->target_speed[i] |=
1990                         w83795_read(client, W83795_REG_FTSL(i)) >> 4;
1991         }
1992         data->tol_speed = w83795_read(client, W83795_REG_TFTS) & 0x3f;
1993
1994         for (i = 0; i < ARRAY_SIZE(data->pwm_temp); i++) {
1995                 data->pwm_temp[i][TEMP_PWM_TTTI] =
1996                         w83795_read(client, W83795_REG_TTTI(i)) & 0x7f;
1997                 data->pwm_temp[i][TEMP_PWM_CTFS] =
1998                         w83795_read(client, W83795_REG_CTFS(i));
1999                 tmp = w83795_read(client, W83795_REG_HT(i));
2000                 data->pwm_temp[i][TEMP_PWM_HCT] = (tmp >> 4) & 0x0f;
2001                 data->pwm_temp[i][TEMP_PWM_HOT] = tmp & 0x0f;
2002         }
2003         for (i = 0; i < ARRAY_SIZE(data->sf4_reg); i++) {
2004                 for (tmp = 0; tmp < 7; tmp++) {
2005                         data->sf4_reg[i][SF4_TEMP][tmp] =
2006                                 w83795_read(client,
2007                                             W83795_REG_SF4_TEMP(i, tmp));
2008                         data->sf4_reg[i][SF4_PWM][tmp] =
2009                                 w83795_read(client, W83795_REG_SF4_PWM(i, tmp));
2010                 }
2011         }
2012
2013         /* Setup PWM Register */
2014         for (i = 0; i < 3; i++) {
2015                 data->setup_pwm[i] =
2016                         w83795_read(client, W83795_REG_SETUP_PWM(i));
2017         }
2018
2019         /* Read beep settings */
2020         for (i = 0; i < ARRAY_SIZE(data->beeps); i++)
2021                 data->beeps[i] = w83795_read(client, W83795_REG_BEEP(i));
2022
2023         err = w83795_handle_files(dev, device_create_file);
2024         if (err)
2025                 goto exit_remove;
2026
2027         if (data->chip_type == w83795g)
2028                 w83795_check_dynamic_in_limits(client);
2029
2030         data->hwmon_dev = hwmon_device_register(dev);
2031         if (IS_ERR(data->hwmon_dev)) {
2032                 err = PTR_ERR(data->hwmon_dev);
2033                 goto exit_remove;
2034         }
2035
2036         return 0;
2037
2038 exit_remove:
2039         w83795_handle_files(dev, device_remove_file_wrapper);
2040         kfree(data);
2041 exit:
2042         return err;
2043 }
2044
2045 static int w83795_remove(struct i2c_client *client)
2046 {
2047         struct w83795_data *data = i2c_get_clientdata(client);
2048
2049         hwmon_device_unregister(data->hwmon_dev);
2050         w83795_handle_files(&client->dev, device_remove_file_wrapper);
2051         kfree(data);
2052
2053         return 0;
2054 }
2055
2056
2057 static const struct i2c_device_id w83795_id[] = {
2058         { "w83795g", w83795g },
2059         { "w83795adg", w83795adg },
2060         { }
2061 };
2062 MODULE_DEVICE_TABLE(i2c, w83795_id);
2063
2064 static struct i2c_driver w83795_driver = {
2065         .driver = {
2066                    .name = "w83795",
2067         },
2068         .probe          = w83795_probe,
2069         .remove         = w83795_remove,
2070         .id_table       = w83795_id,
2071
2072         .class          = I2C_CLASS_HWMON,
2073         .detect         = w83795_detect,
2074         .address_list   = normal_i2c,
2075 };
2076
2077 static int __init sensors_w83795_init(void)
2078 {
2079         return i2c_add_driver(&w83795_driver);
2080 }
2081
2082 static void __exit sensors_w83795_exit(void)
2083 {
2084         i2c_del_driver(&w83795_driver);
2085 }
2086
2087 MODULE_AUTHOR("Wei Song");
2088 MODULE_DESCRIPTION("W83795G/ADG hardware monitoring driver");
2089 MODULE_LICENSE("GPL");
2090
2091 module_init(sensors_w83795_init);
2092 module_exit(sensors_w83795_exit);