drivers/hwmon/adt7475.c

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
temp2reg
reg2temp
tach2rpm
rpm2tach
reg2volt
volt2reg
adt7475_read_word
adt7475_write_word
voltage_show
voltage_store
temp_show
temp_store
temp_st_show
temp_st_store
point2_show
point2_store
tach_show
tach_store
pwm_show
pwmchan_show
pwmctrl_show
pwm_store
stall_disable_show
stall_disable_store
hw_set_pwm
pwmchan_store
pwmctrl_store
pwmfreq_show
pwmfreq_store
pwm_use_point2_pwm_at_crit_show
pwm_use_point2_pwm_at_crit_store
vrm_show
vrm_store
cpu0_vid_show
adt7475_detect
adt7475_update_limits
adt7475_probe
adt7475_read_hystersis
adt7475_read_pwm
adt7475_update_measure
adt7475_update_device
   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * adt7475 - Thermal sensor driver for the ADT7475 chip and derivatives
   4  * Copyright (C) 2007-2008, Advanced Micro Devices, Inc.
   5  * Copyright (C) 2008 Jordan Crouse <jordan@cosmicpenguin.net>
   6  * Copyright (C) 2008 Hans de Goede <hdegoede@redhat.com>
   7  * Copyright (C) 2009 Jean Delvare <jdelvare@suse.de>
   8  *
   9  * Derived from the lm83 driver by Jean Delvare
  10  */
  11 
  12 #include <linux/module.h>
  13 #include <linux/of_device.h>
  14 #include <linux/init.h>
  15 #include <linux/slab.h>
  16 #include <linux/i2c.h>
  17 #include <linux/hwmon.h>
  18 #include <linux/hwmon-sysfs.h>
  19 #include <linux/hwmon-vid.h>
  20 #include <linux/err.h>
  21 #include <linux/jiffies.h>
  22 #include <linux/util_macros.h>
  23 
  24 /* Indexes for the sysfs hooks */
  25 
  26 #define INPUT           0
  27 #define MIN             1
  28 #define MAX             2
  29 #define CONTROL         3
  30 #define OFFSET          3
  31 #define AUTOMIN         4
  32 #define THERM           5
  33 #define HYSTERSIS       6
  34 
  35 /*
  36  * These are unique identifiers for the sysfs functions - unlike the
  37  * numbers above, these are not also indexes into an array
  38  */
  39 
  40 #define ALARM           9
  41 #define FAULT           10
  42 
  43 /* 7475 Common Registers */
  44 
  45 #define REG_DEVREV2             0x12    /* ADT7490 only */
  46 
  47 #define REG_VTT                 0x1E    /* ADT7490 only */
  48 #define REG_EXTEND3             0x1F    /* ADT7490 only */
  49 
  50 #define REG_VOLTAGE_BASE        0x20
  51 #define REG_TEMP_BASE           0x25
  52 #define REG_TACH_BASE           0x28
  53 #define REG_PWM_BASE            0x30
  54 #define REG_PWM_MAX_BASE        0x38
  55 
  56 #define REG_DEVID               0x3D
  57 #define REG_VENDID              0x3E
  58 #define REG_DEVID2              0x3F
  59 
  60 #define REG_CONFIG1             0x40
  61 
  62 #define REG_STATUS1             0x41
  63 #define REG_STATUS2             0x42
  64 
  65 #define REG_VID                 0x43    /* ADT7476 only */
  66 
  67 #define REG_VOLTAGE_MIN_BASE    0x44
  68 #define REG_VOLTAGE_MAX_BASE    0x45
  69 
  70 #define REG_TEMP_MIN_BASE       0x4E
  71 #define REG_TEMP_MAX_BASE       0x4F
  72 
  73 #define REG_TACH_MIN_BASE       0x54
  74 
  75 #define REG_PWM_CONFIG_BASE     0x5C
  76 
  77 #define REG_TEMP_TRANGE_BASE    0x5F
  78 
  79 #define REG_ENHANCE_ACOUSTICS1  0x62
  80 #define REG_ENHANCE_ACOUSTICS2  0x63
  81 
  82 #define REG_PWM_MIN_BASE        0x64
  83 
  84 #define REG_TEMP_TMIN_BASE      0x67
  85 #define REG_TEMP_THERM_BASE     0x6A
  86 
  87 #define REG_REMOTE1_HYSTERSIS   0x6D
  88 #define REG_REMOTE2_HYSTERSIS   0x6E
  89 
  90 #define REG_TEMP_OFFSET_BASE    0x70
  91 
  92 #define REG_CONFIG2             0x73
  93 
  94 #define REG_EXTEND1             0x76
  95 #define REG_EXTEND2             0x77
  96 
  97 #define REG_CONFIG3             0x78
  98 #define REG_CONFIG5             0x7C
  99 #define REG_CONFIG4             0x7D
 100 
 101 #define REG_STATUS4             0x81    /* ADT7490 only */
 102 
 103 #define REG_VTT_MIN             0x84    /* ADT7490 only */
 104 #define REG_VTT_MAX             0x86    /* ADT7490 only */
 105 
 106 #define VID_VIDSEL              0x80    /* ADT7476 only */
 107 
 108 #define CONFIG2_ATTN            0x20
 109 
 110 #define CONFIG3_SMBALERT        0x01
 111 #define CONFIG3_THERM           0x02
 112 
 113 #define CONFIG4_PINFUNC         0x03
 114 #define CONFIG4_MAXDUTY         0x08
 115 #define CONFIG4_ATTN_IN10       0x30
 116 #define CONFIG4_ATTN_IN43       0xC0
 117 
 118 #define CONFIG5_TWOSCOMP        0x01
 119 #define CONFIG5_TEMPOFFSET      0x02
 120 #define CONFIG5_VIDGPIO         0x10    /* ADT7476 only */
 121 
 122 /* ADT7475 Settings */
 123 
 124 #define ADT7475_VOLTAGE_COUNT   5       /* Not counting Vtt */
 125 #define ADT7475_TEMP_COUNT      3
 126 #define ADT7475_TACH_COUNT      4
 127 #define ADT7475_PWM_COUNT       3
 128 
 129 /* Macro to read the registers */
 130 
 131 #define adt7475_read(reg) i2c_smbus_read_byte_data(client, (reg))
 132 
 133 /* Macros to easily index the registers */
 134 
 135 #define TACH_REG(idx) (REG_TACH_BASE + ((idx) * 2))
 136 #define TACH_MIN_REG(idx) (REG_TACH_MIN_BASE + ((idx) * 2))
 137 
 138 #define PWM_REG(idx) (REG_PWM_BASE + (idx))
 139 #define PWM_MAX_REG(idx) (REG_PWM_MAX_BASE + (idx))
 140 #define PWM_MIN_REG(idx) (REG_PWM_MIN_BASE + (idx))
 141 #define PWM_CONFIG_REG(idx) (REG_PWM_CONFIG_BASE + (idx))
 142 
 143 #define VOLTAGE_REG(idx) (REG_VOLTAGE_BASE + (idx))
 144 #define VOLTAGE_MIN_REG(idx) (REG_VOLTAGE_MIN_BASE + ((idx) * 2))
 145 #define VOLTAGE_MAX_REG(idx) (REG_VOLTAGE_MAX_BASE + ((idx) * 2))
 146 
 147 #define TEMP_REG(idx) (REG_TEMP_BASE + (idx))
 148 #define TEMP_MIN_REG(idx) (REG_TEMP_MIN_BASE + ((idx) * 2))
 149 #define TEMP_MAX_REG(idx) (REG_TEMP_MAX_BASE + ((idx) * 2))
 150 #define TEMP_TMIN_REG(idx) (REG_TEMP_TMIN_BASE + (idx))
 151 #define TEMP_THERM_REG(idx) (REG_TEMP_THERM_BASE + (idx))
 152 #define TEMP_OFFSET_REG(idx) (REG_TEMP_OFFSET_BASE + (idx))
 153 #define TEMP_TRANGE_REG(idx) (REG_TEMP_TRANGE_BASE + (idx))
 154 
 155 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
 156 
 157 enum chips { adt7473, adt7475, adt7476, adt7490 };
 158 
 159 static const struct i2c_device_id adt7475_id[] = {
 160         { "adt7473", adt7473 },
 161         { "adt7475", adt7475 },
 162         { "adt7476", adt7476 },
 163         { "adt7490", adt7490 },
 164         { }
 165 };
 166 MODULE_DEVICE_TABLE(i2c, adt7475_id);
 167 
 168 static const struct of_device_id __maybe_unused adt7475_of_match[] = {
 169         {
 170                 .compatible = "adi,adt7473",
 171                 .data = (void *)adt7473
 172         },
 173         {
 174                 .compatible = "adi,adt7475",
 175                 .data = (void *)adt7475
 176         },
 177         {
 178                 .compatible = "adi,adt7476",
 179                 .data = (void *)adt7476
 180         },
 181         {
 182                 .compatible = "adi,adt7490",
 183                 .data = (void *)adt7490
 184         },
 185         { },
 186 };
 187 MODULE_DEVICE_TABLE(of, adt7475_of_match);
 188 
 189 struct adt7475_data {
 190         struct i2c_client *client;
 191         struct mutex lock;
 192 
 193         unsigned long measure_updated;
 194         bool valid;
 195 
 196         u8 config4;
 197         u8 config5;
 198         u8 has_voltage;
 199         u8 bypass_attn;         /* Bypass voltage attenuator */
 200         u8 has_pwm2:1;
 201         u8 has_fan4:1;
 202         u8 has_vid:1;
 203         u32 alarms;
 204         u16 voltage[3][6];
 205         u16 temp[7][3];
 206         u16 tach[2][4];
 207         u8 pwm[4][3];
 208         u8 range[3];
 209         u8 pwmctl[3];
 210         u8 pwmchan[3];
 211         u8 enh_acoustics[2];
 212 
 213         u8 vid;
 214         u8 vrm;
 215         const struct attribute_group *groups[9];
 216 };
 217 
 218 static struct i2c_driver adt7475_driver;
 219 static struct adt7475_data *adt7475_update_device(struct device *dev);
 220 static void adt7475_read_hystersis(struct i2c_client *client);
 221 static void adt7475_read_pwm(struct i2c_client *client, int index);
 222 
 223 /* Given a temp value, convert it to register value */
 224 
 225 static inline u16 temp2reg(struct adt7475_data *data, long val)
 226 {
 227         u16 ret;
 228 
 229         if (!(data->config5 & CONFIG5_TWOSCOMP)) {
 230                 val = clamp_val(val, -64000, 191000);
 231                 ret = (val + 64500) / 1000;
 232         } else {
 233                 val = clamp_val(val, -128000, 127000);
 234                 if (val < -500)
 235                         ret = (256500 + val) / 1000;
 236                 else
 237                         ret = (val + 500) / 1000;
 238         }
 239 
 240         return ret << 2;
 241 }
 242 
 243 /* Given a register value, convert it to a real temp value */
 244 
 245 static inline int reg2temp(struct adt7475_data *data, u16 reg)
 246 {
 247         if (data->config5 & CONFIG5_TWOSCOMP) {
 248                 if (reg >= 512)
 249                         return (reg - 1024) * 250;
 250                 else
 251                         return reg * 250;
 252         } else
 253                 return (reg - 256) * 250;
 254 }
 255 
 256 static inline int tach2rpm(u16 tach)
 257 {
 258         if (tach == 0 || tach == 0xFFFF)
 259                 return 0;
 260 
 261         return (90000 * 60) / tach;
 262 }
 263 
 264 static inline u16 rpm2tach(unsigned long rpm)
 265 {
 266         if (rpm == 0)
 267                 return 0;
 268 
 269         return clamp_val((90000 * 60) / rpm, 1, 0xFFFF);
 270 }
 271 
 272 /* Scaling factors for voltage inputs, taken from the ADT7490 datasheet */
 273 static const int adt7473_in_scaling[ADT7475_VOLTAGE_COUNT + 1][2] = {
 274         { 45, 94 },     /* +2.5V */
 275         { 175, 525 },   /* Vccp */
 276         { 68, 71 },     /* Vcc */
 277         { 93, 47 },     /* +5V */
 278         { 120, 20 },    /* +12V */
 279         { 45, 45 },     /* Vtt */
 280 };
 281 
 282 static inline int reg2volt(int channel, u16 reg, u8 bypass_attn)
 283 {
 284         const int *r = adt7473_in_scaling[channel];
 285 
 286         if (bypass_attn & (1 << channel))
 287                 return DIV_ROUND_CLOSEST(reg * 2250, 1024);
 288         return DIV_ROUND_CLOSEST(reg * (r[0] + r[1]) * 2250, r[1] * 1024);
 289 }
 290 
 291 static inline u16 volt2reg(int channel, long volt, u8 bypass_attn)
 292 {
 293         const int *r = adt7473_in_scaling[channel];
 294         long reg;
 295 
 296         if (bypass_attn & (1 << channel))
 297                 reg = DIV_ROUND_CLOSEST(volt * 1024, 2250);
 298         else
 299                 reg = DIV_ROUND_CLOSEST(volt * r[1] * 1024,
 300                                         (r[0] + r[1]) * 2250);
 301         return clamp_val(reg, 0, 1023) & (0xff << 2);
 302 }
 303 
 304 static int adt7475_read_word(struct i2c_client *client, int reg)
 305 {
 306         int val1, val2;
 307 
 308         val1 = i2c_smbus_read_byte_data(client, reg);
 309         if (val1 < 0)
 310                 return val1;
 311         val2 = i2c_smbus_read_byte_data(client, reg + 1);
 312         if (val2 < 0)
 313                 return val2;
 314 
 315         return val1 | (val2 << 8);
 316 }
 317 
 318 static void adt7475_write_word(struct i2c_client *client, int reg, u16 val)
 319 {
 320         i2c_smbus_write_byte_data(client, reg + 1, val >> 8);
 321         i2c_smbus_write_byte_data(client, reg, val & 0xFF);
 322 }
 323 
 324 static ssize_t voltage_show(struct device *dev, struct device_attribute *attr,
 325                             char *buf)
 326 {
 327         struct adt7475_data *data = adt7475_update_device(dev);
 328         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 329         unsigned short val;
 330 
 331         if (IS_ERR(data))
 332                 return PTR_ERR(data);
 333 
 334         switch (sattr->nr) {
 335         case ALARM:
 336                 return sprintf(buf, "%d\n",
 337                                (data->alarms >> sattr->index) & 1);
 338         default:
 339                 val = data->voltage[sattr->nr][sattr->index];
 340                 return sprintf(buf, "%d\n",
 341                                reg2volt(sattr->index, val, data->bypass_attn));
 342         }
 343 }
 344 
 345 static ssize_t voltage_store(struct device *dev,
 346                              struct device_attribute *attr, const char *buf,
 347                              size_t count)
 348 {
 349 
 350         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 351         struct adt7475_data *data = dev_get_drvdata(dev);
 352         struct i2c_client *client = data->client;
 353         unsigned char reg;
 354         long val;
 355 
 356         if (kstrtol(buf, 10, &val))
 357                 return -EINVAL;
 358 
 359         mutex_lock(&data->lock);
 360 
 361         data->voltage[sattr->nr][sattr->index] =
 362                                 volt2reg(sattr->index, val, data->bypass_attn);
 363 
 364         if (sattr->index < ADT7475_VOLTAGE_COUNT) {
 365                 if (sattr->nr == MIN)
 366                         reg = VOLTAGE_MIN_REG(sattr->index);
 367                 else
 368                         reg = VOLTAGE_MAX_REG(sattr->index);
 369         } else {
 370                 if (sattr->nr == MIN)
 371                         reg = REG_VTT_MIN;
 372                 else
 373                         reg = REG_VTT_MAX;
 374         }
 375 
 376         i2c_smbus_write_byte_data(client, reg,
 377                                   data->voltage[sattr->nr][sattr->index] >> 2);
 378         mutex_unlock(&data->lock);
 379 
 380         return count;
 381 }
 382 
 383 static ssize_t temp_show(struct device *dev, struct device_attribute *attr,
 384                          char *buf)
 385 {
 386         struct adt7475_data *data = adt7475_update_device(dev);
 387         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 388         int out;
 389 
 390         if (IS_ERR(data))
 391                 return PTR_ERR(data);
 392 
 393         switch (sattr->nr) {
 394         case HYSTERSIS:
 395                 mutex_lock(&data->lock);
 396                 out = data->temp[sattr->nr][sattr->index];
 397                 if (sattr->index != 1)
 398                         out = (out >> 4) & 0xF;
 399                 else
 400                         out = (out & 0xF);
 401                 /*
 402                  * Show the value as an absolute number tied to
 403                  * THERM
 404                  */
 405                 out = reg2temp(data, data->temp[THERM][sattr->index]) -
 406                         out * 1000;
 407                 mutex_unlock(&data->lock);
 408                 break;
 409 
 410         case OFFSET:
 411                 /*
 412                  * Offset is always 2's complement, regardless of the
 413                  * setting in CONFIG5
 414                  */
 415                 mutex_lock(&data->lock);
 416                 out = (s8)data->temp[sattr->nr][sattr->index];
 417                 if (data->config5 & CONFIG5_TEMPOFFSET)
 418                         out *= 1000;
 419                 else
 420                         out *= 500;
 421                 mutex_unlock(&data->lock);
 422                 break;
 423 
 424         case ALARM:
 425                 out = (data->alarms >> (sattr->index + 4)) & 1;
 426                 break;
 427 
 428         case FAULT:
 429                 /* Note - only for remote1 and remote2 */
 430                 out = !!(data->alarms & (sattr->index ? 0x8000 : 0x4000));
 431                 break;
 432 
 433         default:
 434                 /* All other temp values are in the configured format */
 435                 out = reg2temp(data, data->temp[sattr->nr][sattr->index]);
 436         }
 437 
 438         return sprintf(buf, "%d\n", out);
 439 }
 440 
 441 static ssize_t temp_store(struct device *dev, struct device_attribute *attr,
 442                           const char *buf, size_t count)
 443 {
 444         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 445         struct adt7475_data *data = dev_get_drvdata(dev);
 446         struct i2c_client *client = data->client;
 447         unsigned char reg = 0;
 448         u8 out;
 449         int temp;
 450         long val;
 451 
 452         if (kstrtol(buf, 10, &val))
 453                 return -EINVAL;
 454 
 455         mutex_lock(&data->lock);
 456 
 457         /* We need the config register in all cases for temp <-> reg conv. */
 458         data->config5 = adt7475_read(REG_CONFIG5);
 459 
 460         switch (sattr->nr) {
 461         case OFFSET:
 462                 if (data->config5 & CONFIG5_TEMPOFFSET) {
 463                         val = clamp_val(val, -63000, 127000);
 464                         out = data->temp[OFFSET][sattr->index] = val / 1000;
 465                 } else {
 466                         val = clamp_val(val, -63000, 64000);
 467                         out = data->temp[OFFSET][sattr->index] = val / 500;
 468                 }
 469                 break;
 470 
 471         case HYSTERSIS:
 472                 /*
 473                  * The value will be given as an absolute value, turn it
 474                  * into an offset based on THERM
 475                  */
 476 
 477                 /* Read fresh THERM and HYSTERSIS values from the chip */
 478                 data->temp[THERM][sattr->index] =
 479                         adt7475_read(TEMP_THERM_REG(sattr->index)) << 2;
 480                 adt7475_read_hystersis(client);
 481 
 482                 temp = reg2temp(data, data->temp[THERM][sattr->index]);
 483                 val = clamp_val(val, temp - 15000, temp);
 484                 val = (temp - val) / 1000;
 485 
 486                 if (sattr->index != 1) {
 487                         data->temp[HYSTERSIS][sattr->index] &= 0xF0;
 488                         data->temp[HYSTERSIS][sattr->index] |= (val & 0xF) << 4;
 489                 } else {
 490                         data->temp[HYSTERSIS][sattr->index] &= 0x0F;
 491                         data->temp[HYSTERSIS][sattr->index] |= (val & 0xF);
 492                 }
 493 
 494                 out = data->temp[HYSTERSIS][sattr->index];
 495                 break;
 496 
 497         default:
 498                 data->temp[sattr->nr][sattr->index] = temp2reg(data, val);
 499 
 500                 /*
 501                  * We maintain an extra 2 digits of precision for simplicity
 502                  * - shift those back off before writing the value
 503                  */
 504                 out = (u8) (data->temp[sattr->nr][sattr->index] >> 2);
 505         }
 506 
 507         switch (sattr->nr) {
 508         case MIN:
 509                 reg = TEMP_MIN_REG(sattr->index);
 510                 break;
 511         case MAX:
 512                 reg = TEMP_MAX_REG(sattr->index);
 513                 break;
 514         case OFFSET:
 515                 reg = TEMP_OFFSET_REG(sattr->index);
 516                 break;
 517         case AUTOMIN:
 518                 reg = TEMP_TMIN_REG(sattr->index);
 519                 break;
 520         case THERM:
 521                 reg = TEMP_THERM_REG(sattr->index);
 522                 break;
 523         case HYSTERSIS:
 524                 if (sattr->index != 2)
 525                         reg = REG_REMOTE1_HYSTERSIS;
 526                 else
 527                         reg = REG_REMOTE2_HYSTERSIS;
 528 
 529                 break;
 530         }
 531 
 532         i2c_smbus_write_byte_data(client, reg, out);
 533 
 534         mutex_unlock(&data->lock);
 535         return count;
 536 }
 537 
 538 /* Assuming CONFIG6[SLOW] is 0 */
 539 static const int ad7475_st_map[] = {
 540         37500, 18800, 12500, 7500, 4700, 3100, 1600, 800,
 541 };
 542 
 543 static ssize_t temp_st_show(struct device *dev, struct device_attribute *attr,
 544                             char *buf)
 545 {
 546         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 547         struct adt7475_data *data = dev_get_drvdata(dev);
 548         long val;
 549 
 550         switch (sattr->index) {
 551         case 0:
 552                 val = data->enh_acoustics[0] & 0xf;
 553                 break;
 554         case 1:
 555                 val = (data->enh_acoustics[1] >> 4) & 0xf;
 556                 break;
 557         case 2:
 558         default:
 559                 val = data->enh_acoustics[1] & 0xf;
 560                 break;
 561         }
 562 
 563         if (val & 0x8)
 564                 return sprintf(buf, "%d\n", ad7475_st_map[val & 0x7]);
 565         else
 566                 return sprintf(buf, "0\n");
 567 }
 568 
 569 static ssize_t temp_st_store(struct device *dev,
 570                              struct device_attribute *attr, const char *buf,
 571                              size_t count)
 572 {
 573         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 574         struct adt7475_data *data = dev_get_drvdata(dev);
 575         struct i2c_client *client = data->client;
 576         unsigned char reg;
 577         int shift, idx;
 578         ulong val;
 579 
 580         if (kstrtoul(buf, 10, &val))
 581                 return -EINVAL;
 582 
 583         switch (sattr->index) {
 584         case 0:
 585                 reg = REG_ENHANCE_ACOUSTICS1;
 586                 shift = 0;
 587                 idx = 0;
 588                 break;
 589         case 1:
 590                 reg = REG_ENHANCE_ACOUSTICS2;
 591                 shift = 0;
 592                 idx = 1;
 593                 break;
 594         case 2:
 595         default:
 596                 reg = REG_ENHANCE_ACOUSTICS2;
 597                 shift = 4;
 598                 idx = 1;
 599                 break;
 600         }
 601 
 602         if (val > 0) {
 603                 val = find_closest_descending(val, ad7475_st_map,
 604                                               ARRAY_SIZE(ad7475_st_map));
 605                 val |= 0x8;
 606         }
 607 
 608         mutex_lock(&data->lock);
 609 
 610         data->enh_acoustics[idx] &= ~(0xf << shift);
 611         data->enh_acoustics[idx] |= (val << shift);
 612 
 613         i2c_smbus_write_byte_data(client, reg, data->enh_acoustics[idx]);
 614 
 615         mutex_unlock(&data->lock);
 616 
 617         return count;
 618 }
 619 
 620 /*
 621  * Table of autorange values - the user will write the value in millidegrees,
 622  * and we'll convert it
 623  */
 624 static const int autorange_table[] = {
 625         2000, 2500, 3330, 4000, 5000, 6670, 8000,
 626         10000, 13330, 16000, 20000, 26670, 32000, 40000,
 627         53330, 80000
 628 };
 629 
 630 static ssize_t point2_show(struct device *dev, struct device_attribute *attr,
 631                            char *buf)
 632 {
 633         struct adt7475_data *data = adt7475_update_device(dev);
 634         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 635         int out, val;
 636 
 637         if (IS_ERR(data))
 638                 return PTR_ERR(data);
 639 
 640         mutex_lock(&data->lock);
 641         out = (data->range[sattr->index] >> 4) & 0x0F;
 642         val = reg2temp(data, data->temp[AUTOMIN][sattr->index]);
 643         mutex_unlock(&data->lock);
 644 
 645         return sprintf(buf, "%d\n", val + autorange_table[out]);
 646 }
 647 
 648 static ssize_t point2_store(struct device *dev, struct device_attribute *attr,
 649                             const char *buf, size_t count)
 650 {
 651         struct adt7475_data *data = dev_get_drvdata(dev);
 652         struct i2c_client *client = data->client;
 653         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 654         int temp;
 655         long val;
 656 
 657         if (kstrtol(buf, 10, &val))
 658                 return -EINVAL;
 659 
 660         mutex_lock(&data->lock);
 661 
 662         /* Get a fresh copy of the needed registers */
 663         data->config5 = adt7475_read(REG_CONFIG5);
 664         data->temp[AUTOMIN][sattr->index] =
 665                 adt7475_read(TEMP_TMIN_REG(sattr->index)) << 2;
 666         data->range[sattr->index] =
 667                 adt7475_read(TEMP_TRANGE_REG(sattr->index));
 668 
 669         /*
 670          * The user will write an absolute value, so subtract the start point
 671          * to figure the range
 672          */
 673         temp = reg2temp(data, data->temp[AUTOMIN][sattr->index]);
 674         val = clamp_val(val, temp + autorange_table[0],
 675                 temp + autorange_table[ARRAY_SIZE(autorange_table) - 1]);
 676         val -= temp;
 677 
 678         /* Find the nearest table entry to what the user wrote */
 679         val = find_closest(val, autorange_table, ARRAY_SIZE(autorange_table));
 680 
 681         data->range[sattr->index] &= ~0xF0;
 682         data->range[sattr->index] |= val << 4;
 683 
 684         i2c_smbus_write_byte_data(client, TEMP_TRANGE_REG(sattr->index),
 685                                   data->range[sattr->index]);
 686 
 687         mutex_unlock(&data->lock);
 688         return count;
 689 }
 690 
 691 static ssize_t tach_show(struct device *dev, struct device_attribute *attr,
 692                          char *buf)
 693 {
 694         struct adt7475_data *data = adt7475_update_device(dev);
 695         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 696         int out;
 697 
 698         if (IS_ERR(data))
 699                 return PTR_ERR(data);
 700 
 701         if (sattr->nr == ALARM)
 702                 out = (data->alarms >> (sattr->index + 10)) & 1;
 703         else
 704                 out = tach2rpm(data->tach[sattr->nr][sattr->index]);
 705 
 706         return sprintf(buf, "%d\n", out);
 707 }
 708 
 709 static ssize_t tach_store(struct device *dev, struct device_attribute *attr,
 710                           const char *buf, size_t count)
 711 {
 712 
 713         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 714         struct adt7475_data *data = dev_get_drvdata(dev);
 715         struct i2c_client *client = data->client;
 716         unsigned long val;
 717 
 718         if (kstrtoul(buf, 10, &val))
 719                 return -EINVAL;
 720 
 721         mutex_lock(&data->lock);
 722 
 723         data->tach[MIN][sattr->index] = rpm2tach(val);
 724 
 725         adt7475_write_word(client, TACH_MIN_REG(sattr->index),
 726                            data->tach[MIN][sattr->index]);
 727 
 728         mutex_unlock(&data->lock);
 729         return count;
 730 }
 731 
 732 static ssize_t pwm_show(struct device *dev, struct device_attribute *attr,
 733                         char *buf)
 734 {
 735         struct adt7475_data *data = adt7475_update_device(dev);
 736         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 737 
 738         if (IS_ERR(data))
 739                 return PTR_ERR(data);
 740 
 741         return sprintf(buf, "%d\n", data->pwm[sattr->nr][sattr->index]);
 742 }
 743 
 744 static ssize_t pwmchan_show(struct device *dev, struct device_attribute *attr,
 745                             char *buf)
 746 {
 747         struct adt7475_data *data = adt7475_update_device(dev);
 748         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 749 
 750         if (IS_ERR(data))
 751                 return PTR_ERR(data);
 752 
 753         return sprintf(buf, "%d\n", data->pwmchan[sattr->index]);
 754 }
 755 
 756 static ssize_t pwmctrl_show(struct device *dev, struct device_attribute *attr,
 757                             char *buf)
 758 {
 759         struct adt7475_data *data = adt7475_update_device(dev);
 760         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 761 
 762         if (IS_ERR(data))
 763                 return PTR_ERR(data);
 764 
 765         return sprintf(buf, "%d\n", data->pwmctl[sattr->index]);
 766 }
 767 
 768 static ssize_t pwm_store(struct device *dev, struct device_attribute *attr,
 769                          const char *buf, size_t count)
 770 {
 771 
 772         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 773         struct adt7475_data *data = dev_get_drvdata(dev);
 774         struct i2c_client *client = data->client;
 775         unsigned char reg = 0;
 776         long val;
 777 
 778         if (kstrtol(buf, 10, &val))
 779                 return -EINVAL;
 780 
 781         mutex_lock(&data->lock);
 782 
 783         switch (sattr->nr) {
 784         case INPUT:
 785                 /* Get a fresh value for CONTROL */
 786                 data->pwm[CONTROL][sattr->index] =
 787                         adt7475_read(PWM_CONFIG_REG(sattr->index));
 788 
 789                 /*
 790                  * If we are not in manual mode, then we shouldn't allow
 791                  * the user to set the pwm speed
 792                  */
 793                 if (((data->pwm[CONTROL][sattr->index] >> 5) & 7) != 7) {
 794                         mutex_unlock(&data->lock);
 795                         return count;
 796                 }
 797 
 798                 reg = PWM_REG(sattr->index);
 799                 break;
 800 
 801         case MIN:
 802                 reg = PWM_MIN_REG(sattr->index);
 803                 break;
 804 
 805         case MAX:
 806                 reg = PWM_MAX_REG(sattr->index);
 807                 break;
 808         }
 809 
 810         data->pwm[sattr->nr][sattr->index] = clamp_val(val, 0, 0xFF);
 811         i2c_smbus_write_byte_data(client, reg,
 812                                   data->pwm[sattr->nr][sattr->index]);
 813         mutex_unlock(&data->lock);
 814 
 815         return count;
 816 }
 817 
 818 static ssize_t stall_disable_show(struct device *dev,
 819                                   struct device_attribute *attr, char *buf)
 820 {
 821         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 822         struct adt7475_data *data = dev_get_drvdata(dev);
 823 
 824         u8 mask = BIT(5 + sattr->index);
 825 
 826         return sprintf(buf, "%d\n", !!(data->enh_acoustics[0] & mask));
 827 }
 828 
 829 static ssize_t stall_disable_store(struct device *dev,
 830                                    struct device_attribute *attr,
 831                                    const char *buf, size_t count)
 832 {
 833         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 834         struct adt7475_data *data = dev_get_drvdata(dev);
 835         struct i2c_client *client = data->client;
 836         long val;
 837         u8 mask = BIT(5 + sattr->index);
 838 
 839         if (kstrtol(buf, 10, &val))
 840                 return -EINVAL;
 841 
 842         mutex_lock(&data->lock);
 843 
 844         data->enh_acoustics[0] &= ~mask;
 845         if (val)
 846                 data->enh_acoustics[0] |= mask;
 847 
 848         i2c_smbus_write_byte_data(client, REG_ENHANCE_ACOUSTICS1,
 849                                   data->enh_acoustics[0]);
 850 
 851         mutex_unlock(&data->lock);
 852 
 853         return count;
 854 }
 855 
 856 /* Called by set_pwmctrl and set_pwmchan */
 857 
 858 static int hw_set_pwm(struct i2c_client *client, int index,
 859                       unsigned int pwmctl, unsigned int pwmchan)
 860 {
 861         struct adt7475_data *data = i2c_get_clientdata(client);
 862         long val = 0;
 863 
 864         switch (pwmctl) {
 865         case 0:
 866                 val = 0x03;     /* Run at full speed */
 867                 break;
 868         case 1:
 869                 val = 0x07;     /* Manual mode */
 870                 break;
 871         case 2:
 872                 switch (pwmchan) {
 873                 case 1:
 874                         /* Remote1 controls PWM */
 875                         val = 0x00;
 876                         break;
 877                 case 2:
 878                         /* local controls PWM */
 879                         val = 0x01;
 880                         break;
 881                 case 4:
 882                         /* remote2 controls PWM */
 883                         val = 0x02;
 884                         break;
 885                 case 6:
 886                         /* local/remote2 control PWM */
 887                         val = 0x05;
 888                         break;
 889                 case 7:
 890                         /* All three control PWM */
 891                         val = 0x06;
 892                         break;
 893                 default:
 894                         return -EINVAL;
 895                 }
 896                 break;
 897         default:
 898                 return -EINVAL;
 899         }
 900 
 901         data->pwmctl[index] = pwmctl;
 902         data->pwmchan[index] = pwmchan;
 903 
 904         data->pwm[CONTROL][index] &= ~0xE0;
 905         data->pwm[CONTROL][index] |= (val & 7) << 5;
 906 
 907         i2c_smbus_write_byte_data(client, PWM_CONFIG_REG(index),
 908                                   data->pwm[CONTROL][index]);
 909 
 910         return 0;
 911 }
 912 
 913 static ssize_t pwmchan_store(struct device *dev,
 914                              struct device_attribute *attr, const char *buf,
 915                              size_t count)
 916 {
 917         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 918         struct adt7475_data *data = dev_get_drvdata(dev);
 919         struct i2c_client *client = data->client;
 920         int r;
 921         long val;
 922 
 923         if (kstrtol(buf, 10, &val))
 924                 return -EINVAL;
 925 
 926         mutex_lock(&data->lock);
 927         /* Read Modify Write PWM values */
 928         adt7475_read_pwm(client, sattr->index);
 929         r = hw_set_pwm(client, sattr->index, data->pwmctl[sattr->index], val);
 930         if (r)
 931                 count = r;
 932         mutex_unlock(&data->lock);
 933 
 934         return count;
 935 }
 936 
 937 static ssize_t pwmctrl_store(struct device *dev,
 938                              struct device_attribute *attr, const char *buf,
 939                              size_t count)
 940 {
 941         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 942         struct adt7475_data *data = dev_get_drvdata(dev);
 943         struct i2c_client *client = data->client;
 944         int r;
 945         long val;
 946 
 947         if (kstrtol(buf, 10, &val))
 948                 return -EINVAL;
 949 
 950         mutex_lock(&data->lock);
 951         /* Read Modify Write PWM values */
 952         adt7475_read_pwm(client, sattr->index);
 953         r = hw_set_pwm(client, sattr->index, val, data->pwmchan[sattr->index]);
 954         if (r)
 955                 count = r;
 956         mutex_unlock(&data->lock);
 957 
 958         return count;
 959 }
 960 
 961 /* List of frequencies for the PWM */
 962 static const int pwmfreq_table[] = {
 963         11, 14, 22, 29, 35, 44, 58, 88, 22500
 964 };
 965 
 966 static ssize_t pwmfreq_show(struct device *dev, struct device_attribute *attr,
 967                             char *buf)
 968 {
 969         struct adt7475_data *data = adt7475_update_device(dev);
 970         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 971         int idx;
 972 
 973         if (IS_ERR(data))
 974                 return PTR_ERR(data);
 975         idx = clamp_val(data->range[sattr->index] & 0xf, 0,
 976                         ARRAY_SIZE(pwmfreq_table) - 1);
 977 
 978         return sprintf(buf, "%d\n", pwmfreq_table[idx]);
 979 }
 980 
 981 static ssize_t pwmfreq_store(struct device *dev,
 982                              struct device_attribute *attr, const char *buf,
 983                              size_t count)
 984 {
 985         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 986         struct adt7475_data *data = dev_get_drvdata(dev);
 987         struct i2c_client *client = data->client;
 988         int out;
 989         long val;
 990 
 991         if (kstrtol(buf, 10, &val))
 992                 return -EINVAL;
 993 
 994         out = find_closest(val, pwmfreq_table, ARRAY_SIZE(pwmfreq_table));
 995 
 996         mutex_lock(&data->lock);
 997 
 998         data->range[sattr->index] =
 999                 adt7475_read(TEMP_TRANGE_REG(sattr->index));
1000         data->range[sattr->index] &= ~0xf;
1001         data->range[sattr->index] |= out;
1002 
1003         i2c_smbus_write_byte_data(client, TEMP_TRANGE_REG(sattr->index),
1004                                   data->range[sattr->index]);
1005 
1006         mutex_unlock(&data->lock);
1007         return count;
1008 }
1009 
1010 static ssize_t pwm_use_point2_pwm_at_crit_show(struct device *dev,
1011                                         struct device_attribute *devattr,
1012                                         char *buf)
1013 {
1014         struct adt7475_data *data = adt7475_update_device(dev);
1015 
1016         if (IS_ERR(data))
1017                 return PTR_ERR(data);
1018 
1019         return sprintf(buf, "%d\n", !!(data->config4 & CONFIG4_MAXDUTY));
1020 }
1021 
1022 static ssize_t pwm_use_point2_pwm_at_crit_store(struct device *dev,
1023                                         struct device_attribute *devattr,
1024                                         const char *buf, size_t count)
1025 {
1026         struct adt7475_data *data = dev_get_drvdata(dev);
1027         struct i2c_client *client = data->client;
1028         long val;
1029 
1030         if (kstrtol(buf, 10, &val))
1031                 return -EINVAL;
1032         if (val != 0 && val != 1)
1033                 return -EINVAL;
1034 
1035         mutex_lock(&data->lock);
1036         data->config4 = i2c_smbus_read_byte_data(client, REG_CONFIG4);
1037         if (val)
1038                 data->config4 |= CONFIG4_MAXDUTY;
1039         else
1040                 data->config4 &= ~CONFIG4_MAXDUTY;
1041         i2c_smbus_write_byte_data(client, REG_CONFIG4, data->config4);
1042         mutex_unlock(&data->lock);
1043 
1044         return count;
1045 }
1046 
1047 static ssize_t vrm_show(struct device *dev, struct device_attribute *devattr,
1048                         char *buf)
1049 {
1050         struct adt7475_data *data = dev_get_drvdata(dev);
1051         return sprintf(buf, "%d\n", (int)data->vrm);
1052 }
1053 
1054 static ssize_t vrm_store(struct device *dev, struct device_attribute *devattr,
1055                          const char *buf, size_t count)
1056 {
1057         struct adt7475_data *data = dev_get_drvdata(dev);
1058         long val;
1059 
1060         if (kstrtol(buf, 10, &val))
1061                 return -EINVAL;
1062         if (val < 0 || val > 255)
1063                 return -EINVAL;
1064         data->vrm = val;
1065 
1066         return count;
1067 }
1068 
1069 static ssize_t cpu0_vid_show(struct device *dev,
1070                              struct device_attribute *devattr, char *buf)
1071 {
1072         struct adt7475_data *data = adt7475_update_device(dev);
1073 
1074         if (IS_ERR(data))
1075                 return PTR_ERR(data);
1076 
1077         return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
1078 }
1079 
1080 static SENSOR_DEVICE_ATTR_2_RO(in0_input, voltage, INPUT, 0);
1081 static SENSOR_DEVICE_ATTR_2_RW(in0_max, voltage, MAX, 0);
1082 static SENSOR_DEVICE_ATTR_2_RW(in0_min, voltage, MIN, 0);
1083 static SENSOR_DEVICE_ATTR_2_RO(in0_alarm, voltage, ALARM, 0);
1084 static SENSOR_DEVICE_ATTR_2_RO(in1_input, voltage, INPUT, 1);
1085 static SENSOR_DEVICE_ATTR_2_RW(in1_max, voltage, MAX, 1);
1086 static SENSOR_DEVICE_ATTR_2_RW(in1_min, voltage, MIN, 1);
1087 static SENSOR_DEVICE_ATTR_2_RO(in1_alarm, voltage, ALARM, 1);
1088 static SENSOR_DEVICE_ATTR_2_RO(in2_input, voltage, INPUT, 2);
1089 static SENSOR_DEVICE_ATTR_2_RW(in2_max, voltage, MAX, 2);
1090 static SENSOR_DEVICE_ATTR_2_RW(in2_min, voltage, MIN, 2);
1091 static SENSOR_DEVICE_ATTR_2_RO(in2_alarm, voltage, ALARM, 2);
1092 static SENSOR_DEVICE_ATTR_2_RO(in3_input, voltage, INPUT, 3);
1093 static SENSOR_DEVICE_ATTR_2_RW(in3_max, voltage, MAX, 3);
1094 static SENSOR_DEVICE_ATTR_2_RW(in3_min, voltage, MIN, 3);
1095 static SENSOR_DEVICE_ATTR_2_RO(in3_alarm, voltage, ALARM, 3);
1096 static SENSOR_DEVICE_ATTR_2_RO(in4_input, voltage, INPUT, 4);
1097 static SENSOR_DEVICE_ATTR_2_RW(in4_max, voltage, MAX, 4);
1098 static SENSOR_DEVICE_ATTR_2_RW(in4_min, voltage, MIN, 4);
1099 static SENSOR_DEVICE_ATTR_2_RO(in4_alarm, voltage, ALARM, 8);
1100 static SENSOR_DEVICE_ATTR_2_RO(in5_input, voltage, INPUT, 5);
1101 static SENSOR_DEVICE_ATTR_2_RW(in5_max, voltage, MAX, 5);
1102 static SENSOR_DEVICE_ATTR_2_RW(in5_min, voltage, MIN, 5);
1103 static SENSOR_DEVICE_ATTR_2_RO(in5_alarm, voltage, ALARM, 31);
1104 static SENSOR_DEVICE_ATTR_2_RO(temp1_input, temp, INPUT, 0);
1105 static SENSOR_DEVICE_ATTR_2_RO(temp1_alarm, temp, ALARM, 0);
1106 static SENSOR_DEVICE_ATTR_2_RO(temp1_fault, temp, FAULT, 0);
1107 static SENSOR_DEVICE_ATTR_2_RW(temp1_max, temp, MAX, 0);
1108 static SENSOR_DEVICE_ATTR_2_RW(temp1_min, temp, MIN, 0);
1109 static SENSOR_DEVICE_ATTR_2_RW(temp1_offset, temp, OFFSET, 0);
1110 static SENSOR_DEVICE_ATTR_2_RW(temp1_auto_point1_temp, temp, AUTOMIN, 0);
1111 static SENSOR_DEVICE_ATTR_2_RW(temp1_auto_point2_temp, point2, 0, 0);
1112 static SENSOR_DEVICE_ATTR_2_RW(temp1_crit, temp, THERM, 0);
1113 static SENSOR_DEVICE_ATTR_2_RW(temp1_crit_hyst, temp, HYSTERSIS, 0);
1114 static SENSOR_DEVICE_ATTR_2_RW(temp1_smoothing, temp_st, 0, 0);
1115 static SENSOR_DEVICE_ATTR_2_RO(temp2_input, temp, INPUT, 1);
1116 static SENSOR_DEVICE_ATTR_2_RO(temp2_alarm, temp, ALARM, 1);
1117 static SENSOR_DEVICE_ATTR_2_RW(temp2_max, temp, MAX, 1);
1118 static SENSOR_DEVICE_ATTR_2_RW(temp2_min, temp, MIN, 1);
1119 static SENSOR_DEVICE_ATTR_2_RW(temp2_offset, temp, OFFSET, 1);
1120 static SENSOR_DEVICE_ATTR_2_RW(temp2_auto_point1_temp, temp, AUTOMIN, 1);
1121 static SENSOR_DEVICE_ATTR_2_RW(temp2_auto_point2_temp, point2, 0, 1);
1122 static SENSOR_DEVICE_ATTR_2_RW(temp2_crit, temp, THERM, 1);
1123 static SENSOR_DEVICE_ATTR_2_RW(temp2_crit_hyst, temp, HYSTERSIS, 1);
1124 static SENSOR_DEVICE_ATTR_2_RW(temp2_smoothing, temp_st, 0, 1);
1125 static SENSOR_DEVICE_ATTR_2_RO(temp3_input, temp, INPUT, 2);
1126 static SENSOR_DEVICE_ATTR_2_RO(temp3_alarm, temp, ALARM, 2);
1127 static SENSOR_DEVICE_ATTR_2_RO(temp3_fault, temp, FAULT, 2);
1128 static SENSOR_DEVICE_ATTR_2_RW(temp3_max, temp, MAX, 2);
1129 static SENSOR_DEVICE_ATTR_2_RW(temp3_min, temp, MIN, 2);
1130 static SENSOR_DEVICE_ATTR_2_RW(temp3_offset, temp, OFFSET, 2);
1131 static SENSOR_DEVICE_ATTR_2_RW(temp3_auto_point1_temp, temp, AUTOMIN, 2);
1132 static SENSOR_DEVICE_ATTR_2_RW(temp3_auto_point2_temp, point2, 0, 2);
1133 static SENSOR_DEVICE_ATTR_2_RW(temp3_crit, temp, THERM, 2);
1134 static SENSOR_DEVICE_ATTR_2_RW(temp3_crit_hyst, temp, HYSTERSIS, 2);
1135 static SENSOR_DEVICE_ATTR_2_RW(temp3_smoothing, temp_st, 0, 2);
1136 static SENSOR_DEVICE_ATTR_2_RO(fan1_input, tach, INPUT, 0);
1137 static SENSOR_DEVICE_ATTR_2_RW(fan1_min, tach, MIN, 0);
1138 static SENSOR_DEVICE_ATTR_2_RO(fan1_alarm, tach, ALARM, 0);
1139 static SENSOR_DEVICE_ATTR_2_RO(fan2_input, tach, INPUT, 1);
1140 static SENSOR_DEVICE_ATTR_2_RW(fan2_min, tach, MIN, 1);
1141 static SENSOR_DEVICE_ATTR_2_RO(fan2_alarm, tach, ALARM, 1);
1142 static SENSOR_DEVICE_ATTR_2_RO(fan3_input, tach, INPUT, 2);
1143 static SENSOR_DEVICE_ATTR_2_RW(fan3_min, tach, MIN, 2);
1144 static SENSOR_DEVICE_ATTR_2_RO(fan3_alarm, tach, ALARM, 2);
1145 static SENSOR_DEVICE_ATTR_2_RO(fan4_input, tach, INPUT, 3);
1146 static SENSOR_DEVICE_ATTR_2_RW(fan4_min, tach, MIN, 3);
1147 static SENSOR_DEVICE_ATTR_2_RO(fan4_alarm, tach, ALARM, 3);
1148 static SENSOR_DEVICE_ATTR_2_RW(pwm1, pwm, INPUT, 0);
1149 static SENSOR_DEVICE_ATTR_2_RW(pwm1_freq, pwmfreq, INPUT, 0);
1150 static SENSOR_DEVICE_ATTR_2_RW(pwm1_enable, pwmctrl, INPUT, 0);
1151 static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_channels_temp, pwmchan, INPUT, 0);
1152 static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_point1_pwm, pwm, MIN, 0);
1153 static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_point2_pwm, pwm, MAX, 0);
1154 static SENSOR_DEVICE_ATTR_2_RW(pwm1_stall_disable, stall_disable, 0, 0);
1155 static SENSOR_DEVICE_ATTR_2_RW(pwm2, pwm, INPUT, 1);
1156 static SENSOR_DEVICE_ATTR_2_RW(pwm2_freq, pwmfreq, INPUT, 1);
1157 static SENSOR_DEVICE_ATTR_2_RW(pwm2_enable, pwmctrl, INPUT, 1);
1158 static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_channels_temp, pwmchan, INPUT, 1);
1159 static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_point1_pwm, pwm, MIN, 1);
1160 static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_point2_pwm, pwm, MAX, 1);
1161 static SENSOR_DEVICE_ATTR_2_RW(pwm2_stall_disable, stall_disable, 0, 1);
1162 static SENSOR_DEVICE_ATTR_2_RW(pwm3, pwm, INPUT, 2);
1163 static SENSOR_DEVICE_ATTR_2_RW(pwm3_freq, pwmfreq, INPUT, 2);
1164 static SENSOR_DEVICE_ATTR_2_RW(pwm3_enable, pwmctrl, INPUT, 2);
1165 static SENSOR_DEVICE_ATTR_2_RW(pwm3_auto_channels_temp, pwmchan, INPUT, 2);
1166 static SENSOR_DEVICE_ATTR_2_RW(pwm3_auto_point1_pwm, pwm, MIN, 2);
1167 static SENSOR_DEVICE_ATTR_2_RW(pwm3_auto_point2_pwm, pwm, MAX, 2);
1168 static SENSOR_DEVICE_ATTR_2_RW(pwm3_stall_disable, stall_disable, 0, 2);
1169 
1170 /* Non-standard name, might need revisiting */
1171 static DEVICE_ATTR_RW(pwm_use_point2_pwm_at_crit);
1172 
1173 static DEVICE_ATTR_RW(vrm);
1174 static DEVICE_ATTR_RO(cpu0_vid);
1175 
1176 static struct attribute *adt7475_attrs[] = {
1177         &sensor_dev_attr_in1_input.dev_attr.attr,
1178         &sensor_dev_attr_in1_max.dev_attr.attr,
1179         &sensor_dev_attr_in1_min.dev_attr.attr,
1180         &sensor_dev_attr_in1_alarm.dev_attr.attr,
1181         &sensor_dev_attr_in2_input.dev_attr.attr,
1182         &sensor_dev_attr_in2_max.dev_attr.attr,
1183         &sensor_dev_attr_in2_min.dev_attr.attr,
1184         &sensor_dev_attr_in2_alarm.dev_attr.attr,
1185         &sensor_dev_attr_temp1_input.dev_attr.attr,
1186         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1187         &sensor_dev_attr_temp1_fault.dev_attr.attr,
1188         &sensor_dev_attr_temp1_max.dev_attr.attr,
1189         &sensor_dev_attr_temp1_min.dev_attr.attr,
1190         &sensor_dev_attr_temp1_offset.dev_attr.attr,
1191         &sensor_dev_attr_temp1_auto_point1_temp.dev_attr.attr,
1192         &sensor_dev_attr_temp1_auto_point2_temp.dev_attr.attr,
1193         &sensor_dev_attr_temp1_crit.dev_attr.attr,
1194         &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
1195         &sensor_dev_attr_temp1_smoothing.dev_attr.attr,
1196         &sensor_dev_attr_temp2_input.dev_attr.attr,
1197         &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1198         &sensor_dev_attr_temp2_max.dev_attr.attr,
1199         &sensor_dev_attr_temp2_min.dev_attr.attr,
1200         &sensor_dev_attr_temp2_offset.dev_attr.attr,
1201         &sensor_dev_attr_temp2_auto_point1_temp.dev_attr.attr,
1202         &sensor_dev_attr_temp2_auto_point2_temp.dev_attr.attr,
1203         &sensor_dev_attr_temp2_crit.dev_attr.attr,
1204         &sensor_dev_attr_temp2_crit_hyst.dev_attr.attr,
1205         &sensor_dev_attr_temp2_smoothing.dev_attr.attr,
1206         &sensor_dev_attr_temp3_input.dev_attr.attr,
1207         &sensor_dev_attr_temp3_fault.dev_attr.attr,
1208         &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1209         &sensor_dev_attr_temp3_max.dev_attr.attr,
1210         &sensor_dev_attr_temp3_min.dev_attr.attr,
1211         &sensor_dev_attr_temp3_offset.dev_attr.attr,
1212         &sensor_dev_attr_temp3_auto_point1_temp.dev_attr.attr,
1213         &sensor_dev_attr_temp3_auto_point2_temp.dev_attr.attr,
1214         &sensor_dev_attr_temp3_crit.dev_attr.attr,
1215         &sensor_dev_attr_temp3_crit_hyst.dev_attr.attr,
1216         &sensor_dev_attr_temp3_smoothing.dev_attr.attr,
1217         &sensor_dev_attr_fan1_input.dev_attr.attr,
1218         &sensor_dev_attr_fan1_min.dev_attr.attr,
1219         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1220         &sensor_dev_attr_fan2_input.dev_attr.attr,
1221         &sensor_dev_attr_fan2_min.dev_attr.attr,
1222         &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1223         &sensor_dev_attr_fan3_input.dev_attr.attr,
1224         &sensor_dev_attr_fan3_min.dev_attr.attr,
1225         &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1226         &sensor_dev_attr_pwm1.dev_attr.attr,
1227         &sensor_dev_attr_pwm1_freq.dev_attr.attr,
1228         &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1229         &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1230         &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1231         &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1232         &sensor_dev_attr_pwm1_stall_disable.dev_attr.attr,
1233         &sensor_dev_attr_pwm3.dev_attr.attr,
1234         &sensor_dev_attr_pwm3_freq.dev_attr.attr,
1235         &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1236         &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1237         &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1238         &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1239         &sensor_dev_attr_pwm3_stall_disable.dev_attr.attr,
1240         &dev_attr_pwm_use_point2_pwm_at_crit.attr,
1241         NULL,
1242 };
1243 
1244 static struct attribute *fan4_attrs[] = {
1245         &sensor_dev_attr_fan4_input.dev_attr.attr,
1246         &sensor_dev_attr_fan4_min.dev_attr.attr,
1247         &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1248         NULL
1249 };
1250 
1251 static struct attribute *pwm2_attrs[] = {
1252         &sensor_dev_attr_pwm2.dev_attr.attr,
1253         &sensor_dev_attr_pwm2_freq.dev_attr.attr,
1254         &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1255         &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1256         &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1257         &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1258         &sensor_dev_attr_pwm2_stall_disable.dev_attr.attr,
1259         NULL
1260 };
1261 
1262 static struct attribute *in0_attrs[] = {
1263         &sensor_dev_attr_in0_input.dev_attr.attr,
1264         &sensor_dev_attr_in0_max.dev_attr.attr,
1265         &sensor_dev_attr_in0_min.dev_attr.attr,
1266         &sensor_dev_attr_in0_alarm.dev_attr.attr,
1267         NULL
1268 };
1269 
1270 static struct attribute *in3_attrs[] = {
1271         &sensor_dev_attr_in3_input.dev_attr.attr,
1272         &sensor_dev_attr_in3_max.dev_attr.attr,
1273         &sensor_dev_attr_in3_min.dev_attr.attr,
1274         &sensor_dev_attr_in3_alarm.dev_attr.attr,
1275         NULL
1276 };
1277 
1278 static struct attribute *in4_attrs[] = {
1279         &sensor_dev_attr_in4_input.dev_attr.attr,
1280         &sensor_dev_attr_in4_max.dev_attr.attr,
1281         &sensor_dev_attr_in4_min.dev_attr.attr,
1282         &sensor_dev_attr_in4_alarm.dev_attr.attr,
1283         NULL
1284 };
1285 
1286 static struct attribute *in5_attrs[] = {
1287         &sensor_dev_attr_in5_input.dev_attr.attr,
1288         &sensor_dev_attr_in5_max.dev_attr.attr,
1289         &sensor_dev_attr_in5_min.dev_attr.attr,
1290         &sensor_dev_attr_in5_alarm.dev_attr.attr,
1291         NULL
1292 };
1293 
1294 static struct attribute *vid_attrs[] = {
1295         &dev_attr_cpu0_vid.attr,
1296         &dev_attr_vrm.attr,
1297         NULL
1298 };
1299 
1300 static const struct attribute_group adt7475_attr_group = { .attrs = adt7475_attrs };
1301 static const struct attribute_group fan4_attr_group = { .attrs = fan4_attrs };
1302 static const struct attribute_group pwm2_attr_group = { .attrs = pwm2_attrs };
1303 static const struct attribute_group in0_attr_group = { .attrs = in0_attrs };
1304 static const struct attribute_group in3_attr_group = { .attrs = in3_attrs };
1305 static const struct attribute_group in4_attr_group = { .attrs = in4_attrs };
1306 static const struct attribute_group in5_attr_group = { .attrs = in5_attrs };
1307 static const struct attribute_group vid_attr_group = { .attrs = vid_attrs };
1308 
1309 static int adt7475_detect(struct i2c_client *client,
1310                           struct i2c_board_info *info)
1311 {
1312         struct i2c_adapter *adapter = client->adapter;
1313         int vendid, devid, devid2;
1314         const char *name;
1315 
1316         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1317                 return -ENODEV;
1318 
1319         vendid = adt7475_read(REG_VENDID);
1320         devid2 = adt7475_read(REG_DEVID2);
1321         if (vendid != 0x41 ||           /* Analog Devices */
1322             (devid2 & 0xf8) != 0x68)
1323                 return -ENODEV;
1324 
1325         devid = adt7475_read(REG_DEVID);
1326         if (devid == 0x73)
1327                 name = "adt7473";
1328         else if (devid == 0x75 && client->addr == 0x2e)
1329                 name = "adt7475";
1330         else if (devid == 0x76)
1331                 name = "adt7476";
1332         else if ((devid2 & 0xfc) == 0x6c)
1333                 name = "adt7490";
1334         else {
1335                 dev_dbg(&adapter->dev,
1336                         "Couldn't detect an ADT7473/75/76/90 part at "
1337                         "0x%02x\n", (unsigned int)client->addr);
1338                 return -ENODEV;
1339         }
1340 
1341         strlcpy(info->type, name, I2C_NAME_SIZE);
1342 
1343         return 0;
1344 }
1345 
1346 static int adt7475_update_limits(struct i2c_client *client)
1347 {
1348         struct adt7475_data *data = i2c_get_clientdata(client);
1349         int i;
1350         int ret;
1351 
1352         ret = adt7475_read(REG_CONFIG4);
1353         if (ret < 0)
1354                 return ret;
1355         data->config4 = ret;
1356 
1357         ret = adt7475_read(REG_CONFIG5);
1358         if (ret < 0)
1359                 return ret;
1360         data->config5 = ret;
1361 
1362         for (i = 0; i < ADT7475_VOLTAGE_COUNT; i++) {
1363                 if (!(data->has_voltage & (1 << i)))
1364                         continue;
1365                 /* Adjust values so they match the input precision */
1366                 ret = adt7475_read(VOLTAGE_MIN_REG(i));
1367                 if (ret < 0)
1368                         return ret;
1369                 data->voltage[MIN][i] = ret << 2;
1370 
1371                 ret = adt7475_read(VOLTAGE_MAX_REG(i));
1372                 if (ret < 0)
1373                         return ret;
1374                 data->voltage[MAX][i] = ret << 2;
1375         }
1376 
1377         if (data->has_voltage & (1 << 5)) {
1378                 ret = adt7475_read(REG_VTT_MIN);
1379                 if (ret < 0)
1380                         return ret;
1381                 data->voltage[MIN][5] = ret << 2;
1382 
1383                 ret = adt7475_read(REG_VTT_MAX);
1384                 if (ret < 0)
1385                         return ret;
1386                 data->voltage[MAX][5] = ret << 2;
1387         }
1388 
1389         for (i = 0; i < ADT7475_TEMP_COUNT; i++) {
1390                 /* Adjust values so they match the input precision */
1391                 ret = adt7475_read(TEMP_MIN_REG(i));
1392                 if (ret < 0)
1393                         return ret;
1394                 data->temp[MIN][i] = ret << 2;
1395 
1396                 ret = adt7475_read(TEMP_MAX_REG(i));
1397                 if (ret < 0)
1398                         return ret;
1399                 data->temp[MAX][i] = ret << 2;
1400 
1401                 ret = adt7475_read(TEMP_TMIN_REG(i));
1402                 if (ret < 0)
1403                         return ret;
1404                 data->temp[AUTOMIN][i] = ret << 2;
1405 
1406                 ret = adt7475_read(TEMP_THERM_REG(i));
1407                 if (ret < 0)
1408                         return ret;
1409                 data->temp[THERM][i] = ret << 2;
1410 
1411                 ret = adt7475_read(TEMP_OFFSET_REG(i));
1412                 if (ret < 0)
1413                         return ret;
1414                 data->temp[OFFSET][i] = ret;
1415         }
1416         adt7475_read_hystersis(client);
1417 
1418         for (i = 0; i < ADT7475_TACH_COUNT; i++) {
1419                 if (i == 3 && !data->has_fan4)
1420                         continue;
1421                 ret = adt7475_read_word(client, TACH_MIN_REG(i));
1422                 if (ret < 0)
1423                         return ret;
1424                 data->tach[MIN][i] = ret;
1425         }
1426 
1427         for (i = 0; i < ADT7475_PWM_COUNT; i++) {
1428                 if (i == 1 && !data->has_pwm2)
1429                         continue;
1430                 ret = adt7475_read(PWM_MAX_REG(i));
1431                 if (ret < 0)
1432                         return ret;
1433                 data->pwm[MAX][i] = ret;
1434 
1435                 ret = adt7475_read(PWM_MIN_REG(i));
1436                 if (ret < 0)
1437                         return ret;
1438                 data->pwm[MIN][i] = ret;
1439                 /* Set the channel and control information */
1440                 adt7475_read_pwm(client, i);
1441         }
1442 
1443         ret = adt7475_read(TEMP_TRANGE_REG(0));
1444         if (ret < 0)
1445                 return ret;
1446         data->range[0] = ret;
1447 
1448         ret = adt7475_read(TEMP_TRANGE_REG(1));
1449         if (ret < 0)
1450                 return ret;
1451         data->range[1] = ret;
1452 
1453         ret = adt7475_read(TEMP_TRANGE_REG(2));
1454         if (ret < 0)
1455                 return ret;
1456         data->range[2] = ret;
1457 
1458         return 0;
1459 }
1460 
1461 static int adt7475_probe(struct i2c_client *client,
1462                          const struct i2c_device_id *id)
1463 {
1464         enum chips chip;
1465         static const char * const names[] = {
1466                 [adt7473] = "ADT7473",
1467                 [adt7475] = "ADT7475",
1468                 [adt7476] = "ADT7476",
1469                 [adt7490] = "ADT7490",
1470         };
1471 
1472         struct adt7475_data *data;
1473         struct device *hwmon_dev;
1474         int i, ret = 0, revision, group_num = 0;
1475         u8 config2, config3;
1476 
1477         data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
1478         if (data == NULL)
1479                 return -ENOMEM;
1480 
1481         mutex_init(&data->lock);
1482         data->client = client;
1483         i2c_set_clientdata(client, data);
1484 
1485         if (client->dev.of_node)
1486                 chip = (enum chips)of_device_get_match_data(&client->dev);
1487         else
1488                 chip = id->driver_data;
1489 
1490         /* Initialize device-specific values */
1491         switch (chip) {
1492         case adt7476:
1493                 data->has_voltage = 0x0e;       /* in1 to in3 */
1494                 revision = adt7475_read(REG_DEVID2) & 0x07;
1495                 break;
1496         case adt7490:
1497                 data->has_voltage = 0x3e;       /* in1 to in5 */
1498                 revision = adt7475_read(REG_DEVID2) & 0x03;
1499                 if (revision == 0x03)
1500                         revision += adt7475_read(REG_DEVREV2);
1501                 break;
1502         default:
1503                 data->has_voltage = 0x06;       /* in1, in2 */
1504                 revision = adt7475_read(REG_DEVID2) & 0x07;
1505         }
1506 
1507         config3 = adt7475_read(REG_CONFIG3);
1508         /* Pin PWM2 may alternatively be used for ALERT output */
1509         if (!(config3 & CONFIG3_SMBALERT))
1510                 data->has_pwm2 = 1;
1511         /* Meaning of this bit is inverted for the ADT7473-1 */
1512         if (id->driver_data == adt7473 && revision >= 1)
1513                 data->has_pwm2 = !data->has_pwm2;
1514 
1515         data->config4 = adt7475_read(REG_CONFIG4);
1516         /* Pin TACH4 may alternatively be used for THERM */
1517         if ((data->config4 & CONFIG4_PINFUNC) == 0x0)
1518                 data->has_fan4 = 1;
1519 
1520         /*
1521          * THERM configuration is more complex on the ADT7476 and ADT7490,
1522          * because 2 different pins (TACH4 and +2.5 Vin) can be used for
1523          * this function
1524          */
1525         if (id->driver_data == adt7490) {
1526                 if ((data->config4 & CONFIG4_PINFUNC) == 0x1 &&
1527                     !(config3 & CONFIG3_THERM))
1528                         data->has_fan4 = 1;
1529         }
1530         if (id->driver_data == adt7476 || id->driver_data == adt7490) {
1531                 if (!(config3 & CONFIG3_THERM) ||
1532                     (data->config4 & CONFIG4_PINFUNC) == 0x1)
1533                         data->has_voltage |= (1 << 0);          /* in0 */
1534         }
1535 
1536         /*
1537          * On the ADT7476, the +12V input pin may instead be used as VID5,
1538          * and VID pins may alternatively be used as GPIO
1539          */
1540         if (id->driver_data == adt7476) {
1541                 u8 vid = adt7475_read(REG_VID);
1542                 if (!(vid & VID_VIDSEL))
1543                         data->has_voltage |= (1 << 4);          /* in4 */
1544 
1545                 data->has_vid = !(adt7475_read(REG_CONFIG5) & CONFIG5_VIDGPIO);
1546         }
1547 
1548         /* Voltage attenuators can be bypassed, globally or individually */
1549         config2 = adt7475_read(REG_CONFIG2);
1550         if (config2 & CONFIG2_ATTN) {
1551                 data->bypass_attn = (0x3 << 3) | 0x3;
1552         } else {
1553                 data->bypass_attn = ((data->config4 & CONFIG4_ATTN_IN10) >> 4) |
1554                                     ((data->config4 & CONFIG4_ATTN_IN43) >> 3);
1555         }
1556         data->bypass_attn &= data->has_voltage;
1557 
1558         /*
1559          * Call adt7475_read_pwm for all pwm's as this will reprogram any
1560          * pwm's which are disabled to manual mode with 0% duty cycle
1561          */
1562         for (i = 0; i < ADT7475_PWM_COUNT; i++)
1563                 adt7475_read_pwm(client, i);
1564 
1565         /* Start monitoring */
1566         switch (chip) {
1567         case adt7475:
1568         case adt7476:
1569                 i2c_smbus_write_byte_data(client, REG_CONFIG1,
1570                                           adt7475_read(REG_CONFIG1) | 0x01);
1571                 break;
1572         default:
1573                 break;
1574         }
1575 
1576         data->groups[group_num++] = &adt7475_attr_group;
1577 
1578         /* Features that can be disabled individually */
1579         if (data->has_fan4) {
1580                 data->groups[group_num++] = &fan4_attr_group;
1581         }
1582         if (data->has_pwm2) {
1583                 data->groups[group_num++] = &pwm2_attr_group;
1584         }
1585         if (data->has_voltage & (1 << 0)) {
1586                 data->groups[group_num++] = &in0_attr_group;
1587         }
1588         if (data->has_voltage & (1 << 3)) {
1589                 data->groups[group_num++] = &in3_attr_group;
1590         }
1591         if (data->has_voltage & (1 << 4)) {
1592                 data->groups[group_num++] = &in4_attr_group;
1593         }
1594         if (data->has_voltage & (1 << 5)) {
1595                 data->groups[group_num++] = &in5_attr_group;
1596         }
1597         if (data->has_vid) {
1598                 data->vrm = vid_which_vrm();
1599                 data->groups[group_num] = &vid_attr_group;
1600         }
1601 
1602         /* register device with all the acquired attributes */
1603         hwmon_dev = devm_hwmon_device_register_with_groups(&client->dev,
1604                                                            client->name, data,
1605                                                            data->groups);
1606 
1607         if (IS_ERR(hwmon_dev)) {
1608                 ret = PTR_ERR(hwmon_dev);
1609                 return ret;
1610         }
1611 
1612         dev_info(&client->dev, "%s device, revision %d\n",
1613                  names[id->driver_data], revision);
1614         if ((data->has_voltage & 0x11) || data->has_fan4 || data->has_pwm2)
1615                 dev_info(&client->dev, "Optional features:%s%s%s%s%s\n",
1616                          (data->has_voltage & (1 << 0)) ? " in0" : "",
1617                          (data->has_voltage & (1 << 4)) ? " in4" : "",
1618                          data->has_fan4 ? " fan4" : "",
1619                          data->has_pwm2 ? " pwm2" : "",
1620                          data->has_vid ? " vid" : "");
1621         if (data->bypass_attn)
1622                 dev_info(&client->dev, "Bypassing attenuators on:%s%s%s%s\n",
1623                          (data->bypass_attn & (1 << 0)) ? " in0" : "",
1624                          (data->bypass_attn & (1 << 1)) ? " in1" : "",
1625                          (data->bypass_attn & (1 << 3)) ? " in3" : "",
1626                          (data->bypass_attn & (1 << 4)) ? " in4" : "");
1627 
1628         /* Limits and settings, should never change update more than once */
1629         ret = adt7475_update_limits(client);
1630         if (ret)
1631                 return ret;
1632 
1633         return 0;
1634 }
1635 
1636 static struct i2c_driver adt7475_driver = {
1637         .class          = I2C_CLASS_HWMON,
1638         .driver = {
1639                 .name   = "adt7475",
1640                 .of_match_table = of_match_ptr(adt7475_of_match),
1641         },
1642         .probe          = adt7475_probe,
1643         .id_table       = adt7475_id,
1644         .detect         = adt7475_detect,
1645         .address_list   = normal_i2c,
1646 };
1647 
1648 static void adt7475_read_hystersis(struct i2c_client *client)
1649 {
1650         struct adt7475_data *data = i2c_get_clientdata(client);
1651 
1652         data->temp[HYSTERSIS][0] = (u16) adt7475_read(REG_REMOTE1_HYSTERSIS);
1653         data->temp[HYSTERSIS][1] = data->temp[HYSTERSIS][0];
1654         data->temp[HYSTERSIS][2] = (u16) adt7475_read(REG_REMOTE2_HYSTERSIS);
1655 }
1656 
1657 static void adt7475_read_pwm(struct i2c_client *client, int index)
1658 {
1659         struct adt7475_data *data = i2c_get_clientdata(client);
1660         unsigned int v;
1661 
1662         data->pwm[CONTROL][index] = adt7475_read(PWM_CONFIG_REG(index));
1663 
1664         /*
1665          * Figure out the internal value for pwmctrl and pwmchan
1666          * based on the current settings
1667          */
1668         v = (data->pwm[CONTROL][index] >> 5) & 7;
1669 
1670         if (v == 3)
1671                 data->pwmctl[index] = 0;
1672         else if (v == 7)
1673                 data->pwmctl[index] = 1;
1674         else if (v == 4) {
1675                 /*
1676                  * The fan is disabled - we don't want to
1677                  * support that, so change to manual mode and
1678                  * set the duty cycle to 0 instead
1679                  */
1680                 data->pwm[INPUT][index] = 0;
1681                 data->pwm[CONTROL][index] &= ~0xE0;
1682                 data->pwm[CONTROL][index] |= (7 << 5);
1683 
1684                 i2c_smbus_write_byte_data(client, PWM_CONFIG_REG(index),
1685                                           data->pwm[INPUT][index]);
1686 
1687                 i2c_smbus_write_byte_data(client, PWM_CONFIG_REG(index),
1688                                           data->pwm[CONTROL][index]);
1689 
1690                 data->pwmctl[index] = 1;
1691         } else {
1692                 data->pwmctl[index] = 2;
1693 
1694                 switch (v) {
1695                 case 0:
1696                         data->pwmchan[index] = 1;
1697                         break;
1698                 case 1:
1699                         data->pwmchan[index] = 2;
1700                         break;
1701                 case 2:
1702                         data->pwmchan[index] = 4;
1703                         break;
1704                 case 5:
1705                         data->pwmchan[index] = 6;
1706                         break;
1707                 case 6:
1708                         data->pwmchan[index] = 7;
1709                         break;
1710                 }
1711         }
1712 }
1713 
1714 static int adt7475_update_measure(struct device *dev)
1715 {
1716         struct adt7475_data *data = dev_get_drvdata(dev);
1717         struct i2c_client *client = data->client;
1718         u16 ext;
1719         int i;
1720         int ret;
1721 
1722         ret = adt7475_read(REG_STATUS2);
1723         if (ret < 0)
1724                 return ret;
1725         data->alarms = ret << 8;
1726 
1727         ret = adt7475_read(REG_STATUS1);
1728         if (ret < 0)
1729                 return ret;
1730         data->alarms |= ret;
1731 
1732         ret = adt7475_read(REG_EXTEND2);
1733         if (ret < 0)
1734                 return ret;
1735 
1736         ext = (ret << 8);
1737 
1738         ret = adt7475_read(REG_EXTEND1);
1739         if (ret < 0)
1740                 return ret;
1741 
1742         ext |= ret;
1743 
1744         for (i = 0; i < ADT7475_VOLTAGE_COUNT; i++) {
1745                 if (!(data->has_voltage & (1 << i)))
1746                         continue;
1747                 ret = adt7475_read(VOLTAGE_REG(i));
1748                 if (ret < 0)
1749                         return ret;
1750                 data->voltage[INPUT][i] =
1751                         (ret << 2) |
1752                         ((ext >> (i * 2)) & 3);
1753         }
1754 
1755         for (i = 0; i < ADT7475_TEMP_COUNT; i++) {
1756                 ret = adt7475_read(TEMP_REG(i));
1757                 if (ret < 0)
1758                         return ret;
1759                 data->temp[INPUT][i] =
1760                         (ret << 2) |
1761                         ((ext >> ((i + 5) * 2)) & 3);
1762         }
1763 
1764         if (data->has_voltage & (1 << 5)) {
1765                 ret = adt7475_read(REG_STATUS4);
1766                 if (ret < 0)
1767                         return ret;
1768                 data->alarms |= ret << 24;
1769 
1770                 ret = adt7475_read(REG_EXTEND3);
1771                 if (ret < 0)
1772                         return ret;
1773                 ext = ret;
1774 
1775                 ret = adt7475_read(REG_VTT);
1776                 if (ret < 0)
1777                         return ret;
1778                 data->voltage[INPUT][5] = ret << 2 |
1779                         ((ext >> 4) & 3);
1780         }
1781 
1782         for (i = 0; i < ADT7475_TACH_COUNT; i++) {
1783                 if (i == 3 && !data->has_fan4)
1784                         continue;
1785                 ret = adt7475_read_word(client, TACH_REG(i));
1786                 if (ret < 0)
1787                         return ret;
1788                 data->tach[INPUT][i] = ret;
1789         }
1790 
1791         /* Updated by hw when in auto mode */
1792         for (i = 0; i < ADT7475_PWM_COUNT; i++) {
1793                 if (i == 1 && !data->has_pwm2)
1794                         continue;
1795                 ret = adt7475_read(PWM_REG(i));
1796                 if (ret < 0)
1797                         return ret;
1798                 data->pwm[INPUT][i] = ret;
1799         }
1800 
1801         if (data->has_vid) {
1802                 ret = adt7475_read(REG_VID);
1803                 if (ret < 0)
1804                         return ret;
1805                 data->vid = ret & 0x3f;
1806         }
1807 
1808         return 0;
1809 }
1810 
1811 static struct adt7475_data *adt7475_update_device(struct device *dev)
1812 {
1813         struct adt7475_data *data = dev_get_drvdata(dev);
1814         int ret;
1815 
1816         mutex_lock(&data->lock);
1817 
1818         /* Measurement values update every 2 seconds */
1819         if (time_after(jiffies, data->measure_updated + HZ * 2) ||
1820             !data->valid) {
1821                 ret = adt7475_update_measure(dev);
1822                 if (ret) {
1823                         data->valid = false;
1824                         mutex_unlock(&data->lock);
1825                         return ERR_PTR(ret);
1826                 }
1827                 data->measure_updated = jiffies;
1828                 data->valid = true;
1829         }
1830 
1831         mutex_unlock(&data->lock);
1832 
1833         return data;
1834 }
1835 
1836 module_i2c_driver(adt7475_driver);
1837 
1838 MODULE_AUTHOR("Advanced Micro Devices, Inc");
1839 MODULE_DESCRIPTION("adt7475 driver");
1840 MODULE_LICENSE("GPL");
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/hwmon/adt7475.c

DEFINITIONS
