linux/drivers/hwmon/adt7475.c
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   1/*
   2 * adt7475 - Thermal sensor driver for the ADT7475 chip and derivatives
   3 * Copyright (C) 2007-2008, Advanced Micro Devices, Inc.
   4 * Copyright (C) 2008 Jordan Crouse <jordan@cosmicpenguin.net>
   5 * Copyright (C) 2008 Hans de Goede <hdegoede@redhat.com>
   6 * Copyright (C) 2009 Jean Delvare <khali@linux-fr.org>
   7 *
   8 * Derived from the lm83 driver by Jean Delvare
   9 *
  10 * This program is free software; you can redistribute it and/or modify
  11 * it under the terms of the GNU General Public License version 2 as
  12 * published by the Free Software Foundation.
  13 */
  14
  15#include <linux/module.h>
  16#include <linux/init.h>
  17#include <linux/slab.h>
  18#include <linux/i2c.h>
  19#include <linux/hwmon.h>
  20#include <linux/hwmon-sysfs.h>
  21#include <linux/hwmon-vid.h>
  22#include <linux/err.h>
  23#include <linux/jiffies.h>
  24
  25/* Indexes for the sysfs hooks */
  26
  27#define INPUT           0
  28#define MIN             1
  29#define MAX             2
  30#define CONTROL         3
  31#define OFFSET          3
  32#define AUTOMIN         4
  33#define THERM           5
  34#define HYSTERSIS       6
  35
  36/*
  37 * These are unique identifiers for the sysfs functions - unlike the
  38 * numbers above, these are not also indexes into an array
  39 */
  40
  41#define ALARM           9
  42#define FAULT           10
  43
  44/* 7475 Common Registers */
  45
  46#define REG_DEVREV2             0x12    /* ADT7490 only */
  47
  48#define REG_VTT                 0x1E    /* ADT7490 only */
  49#define REG_EXTEND3             0x1F    /* ADT7490 only */
  50
  51#define REG_VOLTAGE_BASE        0x20
  52#define REG_TEMP_BASE           0x25
  53#define REG_TACH_BASE           0x28
  54#define REG_PWM_BASE            0x30
  55#define REG_PWM_MAX_BASE        0x38
  56
  57#define REG_DEVID               0x3D
  58#define REG_VENDID              0x3E
  59#define REG_DEVID2              0x3F
  60
  61#define REG_STATUS1             0x41
  62#define REG_STATUS2             0x42
  63
  64#define REG_VID                 0x43    /* ADT7476 only */
  65
  66#define REG_VOLTAGE_MIN_BASE    0x44
  67#define REG_VOLTAGE_MAX_BASE    0x45
  68
  69#define REG_TEMP_MIN_BASE       0x4E
  70#define REG_TEMP_MAX_BASE       0x4F
  71
  72#define REG_TACH_MIN_BASE       0x54
  73
  74#define REG_PWM_CONFIG_BASE     0x5C
  75
  76#define REG_TEMP_TRANGE_BASE    0x5F
  77
  78#define REG_PWM_MIN_BASE        0x64
  79
  80#define REG_TEMP_TMIN_BASE      0x67
  81#define REG_TEMP_THERM_BASE     0x6A
  82
  83#define REG_REMOTE1_HYSTERSIS   0x6D
  84#define REG_REMOTE2_HYSTERSIS   0x6E
  85
  86#define REG_TEMP_OFFSET_BASE    0x70
  87
  88#define REG_CONFIG2             0x73
  89
  90#define REG_EXTEND1             0x76
  91#define REG_EXTEND2             0x77
  92
  93#define REG_CONFIG3             0x78
  94#define REG_CONFIG5             0x7C
  95#define REG_CONFIG4             0x7D
  96
  97#define REG_STATUS4             0x81    /* ADT7490 only */
  98
  99#define REG_VTT_MIN             0x84    /* ADT7490 only */
 100#define REG_VTT_MAX             0x86    /* ADT7490 only */
 101
 102#define VID_VIDSEL              0x80    /* ADT7476 only */
 103
 104#define CONFIG2_ATTN            0x20
 105
 106#define CONFIG3_SMBALERT        0x01
 107#define CONFIG3_THERM           0x02
 108
 109#define CONFIG4_PINFUNC         0x03
 110#define CONFIG4_MAXDUTY         0x08
 111#define CONFIG4_ATTN_IN10       0x30
 112#define CONFIG4_ATTN_IN43       0xC0
 113
 114#define CONFIG5_TWOSCOMP        0x01
 115#define CONFIG5_TEMPOFFSET      0x02
 116#define CONFIG5_VIDGPIO         0x10    /* ADT7476 only */
 117
 118/* ADT7475 Settings */
 119
 120#define ADT7475_VOLTAGE_COUNT   5       /* Not counting Vtt */
 121#define ADT7475_TEMP_COUNT      3
 122#define ADT7475_TACH_COUNT      4
 123#define ADT7475_PWM_COUNT       3
 124
 125/* Macro to read the registers */
 126
 127#define adt7475_read(reg) i2c_smbus_read_byte_data(client, (reg))
 128
 129/* Macros to easily index the registers */
 130
 131#define TACH_REG(idx) (REG_TACH_BASE + ((idx) * 2))
 132#define TACH_MIN_REG(idx) (REG_TACH_MIN_BASE + ((idx) * 2))
 133
 134#define PWM_REG(idx) (REG_PWM_BASE + (idx))
 135#define PWM_MAX_REG(idx) (REG_PWM_MAX_BASE + (idx))
 136#define PWM_MIN_REG(idx) (REG_PWM_MIN_BASE + (idx))
 137#define PWM_CONFIG_REG(idx) (REG_PWM_CONFIG_BASE + (idx))
 138
 139#define VOLTAGE_REG(idx) (REG_VOLTAGE_BASE + (idx))
 140#define VOLTAGE_MIN_REG(idx) (REG_VOLTAGE_MIN_BASE + ((idx) * 2))
 141#define VOLTAGE_MAX_REG(idx) (REG_VOLTAGE_MAX_BASE + ((idx) * 2))
 142
 143#define TEMP_REG(idx) (REG_TEMP_BASE + (idx))
 144#define TEMP_MIN_REG(idx) (REG_TEMP_MIN_BASE + ((idx) * 2))
 145#define TEMP_MAX_REG(idx) (REG_TEMP_MAX_BASE + ((idx) * 2))
 146#define TEMP_TMIN_REG(idx) (REG_TEMP_TMIN_BASE + (idx))
 147#define TEMP_THERM_REG(idx) (REG_TEMP_THERM_BASE + (idx))
 148#define TEMP_OFFSET_REG(idx) (REG_TEMP_OFFSET_BASE + (idx))
 149#define TEMP_TRANGE_REG(idx) (REG_TEMP_TRANGE_BASE + (idx))
 150
 151static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
 152
 153enum chips { adt7473, adt7475, adt7476, adt7490 };
 154
 155static const struct i2c_device_id adt7475_id[] = {
 156        { "adt7473", adt7473 },
 157        { "adt7475", adt7475 },
 158        { "adt7476", adt7476 },
 159        { "adt7490", adt7490 },
 160        { }
 161};
 162MODULE_DEVICE_TABLE(i2c, adt7475_id);
 163
 164struct adt7475_data {
 165        struct device *hwmon_dev;
 166        struct mutex lock;
 167
 168        unsigned long measure_updated;
 169        unsigned long limits_updated;
 170        char valid;
 171
 172        u8 config4;
 173        u8 config5;
 174        u8 has_voltage;
 175        u8 bypass_attn;         /* Bypass voltage attenuator */
 176        u8 has_pwm2:1;
 177        u8 has_fan4:1;
 178        u8 has_vid:1;
 179        u32 alarms;
 180        u16 voltage[3][6];
 181        u16 temp[7][3];
 182        u16 tach[2][4];
 183        u8 pwm[4][3];
 184        u8 range[3];
 185        u8 pwmctl[3];
 186        u8 pwmchan[3];
 187
 188        u8 vid;
 189        u8 vrm;
 190};
 191
 192static struct i2c_driver adt7475_driver;
 193static struct adt7475_data *adt7475_update_device(struct device *dev);
 194static void adt7475_read_hystersis(struct i2c_client *client);
 195static void adt7475_read_pwm(struct i2c_client *client, int index);
 196
 197/* Given a temp value, convert it to register value */
 198
 199static inline u16 temp2reg(struct adt7475_data *data, long val)
 200{
 201        u16 ret;
 202
 203        if (!(data->config5 & CONFIG5_TWOSCOMP)) {
 204                val = SENSORS_LIMIT(val, -64000, 191000);
 205                ret = (val + 64500) / 1000;
 206        } else {
 207                val = SENSORS_LIMIT(val, -128000, 127000);
 208                if (val < -500)
 209                        ret = (256500 + val) / 1000;
 210                else
 211                        ret = (val + 500) / 1000;
 212        }
 213
 214        return ret << 2;
 215}
 216
 217/* Given a register value, convert it to a real temp value */
 218
 219static inline int reg2temp(struct adt7475_data *data, u16 reg)
 220{
 221        if (data->config5 & CONFIG5_TWOSCOMP) {
 222                if (reg >= 512)
 223                        return (reg - 1024) * 250;
 224                else
 225                        return reg * 250;
 226        } else
 227                return (reg - 256) * 250;
 228}
 229
 230static inline int tach2rpm(u16 tach)
 231{
 232        if (tach == 0 || tach == 0xFFFF)
 233                return 0;
 234
 235        return (90000 * 60) / tach;
 236}
 237
 238static inline u16 rpm2tach(unsigned long rpm)
 239{
 240        if (rpm == 0)
 241                return 0;
 242
 243        return SENSORS_LIMIT((90000 * 60) / rpm, 1, 0xFFFF);
 244}
 245
 246/* Scaling factors for voltage inputs, taken from the ADT7490 datasheet */
 247static const int adt7473_in_scaling[ADT7475_VOLTAGE_COUNT + 1][2] = {
 248        { 45, 94 },     /* +2.5V */
 249        { 175, 525 },   /* Vccp */
 250        { 68, 71 },     /* Vcc */
 251        { 93, 47 },     /* +5V */
 252        { 120, 20 },    /* +12V */
 253        { 45, 45 },     /* Vtt */
 254};
 255
 256static inline int reg2volt(int channel, u16 reg, u8 bypass_attn)
 257{
 258        const int *r = adt7473_in_scaling[channel];
 259
 260        if (bypass_attn & (1 << channel))
 261                return DIV_ROUND_CLOSEST(reg * 2250, 1024);
 262        return DIV_ROUND_CLOSEST(reg * (r[0] + r[1]) * 2250, r[1] * 1024);
 263}
 264
 265static inline u16 volt2reg(int channel, long volt, u8 bypass_attn)
 266{
 267        const int *r = adt7473_in_scaling[channel];
 268        long reg;
 269
 270        if (bypass_attn & (1 << channel))
 271                reg = (volt * 1024) / 2250;
 272        else
 273                reg = (volt * r[1] * 1024) / ((r[0] + r[1]) * 2250);
 274        return SENSORS_LIMIT(reg, 0, 1023) & (0xff << 2);
 275}
 276
 277static u16 adt7475_read_word(struct i2c_client *client, int reg)
 278{
 279        u16 val;
 280
 281        val = i2c_smbus_read_byte_data(client, reg);
 282        val |= (i2c_smbus_read_byte_data(client, reg + 1) << 8);
 283
 284        return val;
 285}
 286
 287static void adt7475_write_word(struct i2c_client *client, int reg, u16 val)
 288{
 289        i2c_smbus_write_byte_data(client, reg + 1, val >> 8);
 290        i2c_smbus_write_byte_data(client, reg, val & 0xFF);
 291}
 292
 293/*
 294 * Find the nearest value in a table - used for pwm frequency and
 295 * auto temp range
 296 */
 297static int find_nearest(long val, const int *array, int size)
 298{
 299        int i;
 300
 301        if (val < array[0])
 302                return 0;
 303
 304        if (val > array[size - 1])
 305                return size - 1;
 306
 307        for (i = 0; i < size - 1; i++) {
 308                int a, b;
 309
 310                if (val > array[i + 1])
 311                        continue;
 312
 313                a = val - array[i];
 314                b = array[i + 1] - val;
 315
 316                return (a <= b) ? i : i + 1;
 317        }
 318
 319        return 0;
 320}
 321
 322static ssize_t show_voltage(struct device *dev, struct device_attribute *attr,
 323                            char *buf)
 324{
 325        struct adt7475_data *data = adt7475_update_device(dev);
 326        struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 327        unsigned short val;
 328
 329        switch (sattr->nr) {
 330        case ALARM:
 331                return sprintf(buf, "%d\n",
 332                               (data->alarms >> sattr->index) & 1);
 333        default:
 334                val = data->voltage[sattr->nr][sattr->index];
 335                return sprintf(buf, "%d\n",
 336                               reg2volt(sattr->index, val, data->bypass_attn));
 337        }
 338}
 339
 340static ssize_t set_voltage(struct device *dev, struct device_attribute *attr,
 341                           const char *buf, size_t count)
 342{
 343
 344        struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 345        struct i2c_client *client = to_i2c_client(dev);
 346        struct adt7475_data *data = i2c_get_clientdata(client);
 347        unsigned char reg;
 348        long val;
 349
 350        if (kstrtol(buf, 10, &val))
 351                return -EINVAL;
 352
 353        mutex_lock(&data->lock);
 354
 355        data->voltage[sattr->nr][sattr->index] =
 356                                volt2reg(sattr->index, val, data->bypass_attn);
 357
 358        if (sattr->index < ADT7475_VOLTAGE_COUNT) {
 359                if (sattr->nr == MIN)
 360                        reg = VOLTAGE_MIN_REG(sattr->index);
 361                else
 362                        reg = VOLTAGE_MAX_REG(sattr->index);
 363        } else {
 364                if (sattr->nr == MIN)
 365                        reg = REG_VTT_MIN;
 366                else
 367                        reg = REG_VTT_MAX;
 368        }
 369
 370        i2c_smbus_write_byte_data(client, reg,
 371                                  data->voltage[sattr->nr][sattr->index] >> 2);
 372        mutex_unlock(&data->lock);
 373
 374        return count;
 375}
 376
 377static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
 378                         char *buf)
 379{
 380        struct adt7475_data *data = adt7475_update_device(dev);
 381        struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 382        int out;
 383
 384        switch (sattr->nr) {
 385        case HYSTERSIS:
 386                mutex_lock(&data->lock);
 387                out = data->temp[sattr->nr][sattr->index];
 388                if (sattr->index != 1)
 389                        out = (out >> 4) & 0xF;
 390                else
 391                        out = (out & 0xF);
 392                /*
 393                 * Show the value as an absolute number tied to
 394                 * THERM
 395                 */
 396                out = reg2temp(data, data->temp[THERM][sattr->index]) -
 397                        out * 1000;
 398                mutex_unlock(&data->lock);
 399                break;
 400
 401        case OFFSET:
 402                /*
 403                 * Offset is always 2's complement, regardless of the
 404                 * setting in CONFIG5
 405                 */
 406                mutex_lock(&data->lock);
 407                out = (s8)data->temp[sattr->nr][sattr->index];
 408                if (data->config5 & CONFIG5_TEMPOFFSET)
 409                        out *= 1000;
 410                else
 411                        out *= 500;
 412                mutex_unlock(&data->lock);
 413                break;
 414
 415        case ALARM:
 416                out = (data->alarms >> (sattr->index + 4)) & 1;
 417                break;
 418
 419        case FAULT:
 420                /* Note - only for remote1 and remote2 */
 421                out = !!(data->alarms & (sattr->index ? 0x8000 : 0x4000));
 422                break;
 423
 424        default:
 425                /* All other temp values are in the configured format */
 426                out = reg2temp(data, data->temp[sattr->nr][sattr->index]);
 427        }
 428
 429        return sprintf(buf, "%d\n", out);
 430}
 431
 432static ssize_t set_temp(struct device *dev, struct device_attribute *attr,
 433                        const char *buf, size_t count)
 434{
 435        struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 436        struct i2c_client *client = to_i2c_client(dev);
 437        struct adt7475_data *data = i2c_get_clientdata(client);
 438        unsigned char reg = 0;
 439        u8 out;
 440        int temp;
 441        long val;
 442
 443        if (kstrtol(buf, 10, &val))
 444                return -EINVAL;
 445
 446        mutex_lock(&data->lock);
 447
 448        /* We need the config register in all cases for temp <-> reg conv. */
 449        data->config5 = adt7475_read(REG_CONFIG5);
 450
 451        switch (sattr->nr) {
 452        case OFFSET:
 453                if (data->config5 & CONFIG5_TEMPOFFSET) {
 454                        val = SENSORS_LIMIT(val, -63000, 127000);
 455                        out = data->temp[OFFSET][sattr->index] = val / 1000;
 456                } else {
 457                        val = SENSORS_LIMIT(val, -63000, 64000);
 458                        out = data->temp[OFFSET][sattr->index] = val / 500;
 459                }
 460                break;
 461
 462        case HYSTERSIS:
 463                /*
 464                 * The value will be given as an absolute value, turn it
 465                 * into an offset based on THERM
 466                 */
 467
 468                /* Read fresh THERM and HYSTERSIS values from the chip */
 469                data->temp[THERM][sattr->index] =
 470                        adt7475_read(TEMP_THERM_REG(sattr->index)) << 2;
 471                adt7475_read_hystersis(client);
 472
 473                temp = reg2temp(data, data->temp[THERM][sattr->index]);
 474                val = SENSORS_LIMIT(val, temp - 15000, temp);
 475                val = (temp - val) / 1000;
 476
 477                if (sattr->index != 1) {
 478                        data->temp[HYSTERSIS][sattr->index] &= 0xF0;
 479                        data->temp[HYSTERSIS][sattr->index] |= (val & 0xF) << 4;
 480                } else {
 481                        data->temp[HYSTERSIS][sattr->index] &= 0x0F;
 482                        data->temp[HYSTERSIS][sattr->index] |= (val & 0xF);
 483                }
 484
 485                out = data->temp[HYSTERSIS][sattr->index];
 486                break;
 487
 488        default:
 489                data->temp[sattr->nr][sattr->index] = temp2reg(data, val);
 490
 491                /*
 492                 * We maintain an extra 2 digits of precision for simplicity
 493                 * - shift those back off before writing the value
 494                 */
 495                out = (u8) (data->temp[sattr->nr][sattr->index] >> 2);
 496        }
 497
 498        switch (sattr->nr) {
 499        case MIN:
 500                reg = TEMP_MIN_REG(sattr->index);
 501                break;
 502        case MAX:
 503                reg = TEMP_MAX_REG(sattr->index);
 504                break;
 505        case OFFSET:
 506                reg = TEMP_OFFSET_REG(sattr->index);
 507                break;
 508        case AUTOMIN:
 509                reg = TEMP_TMIN_REG(sattr->index);
 510                break;
 511        case THERM:
 512                reg = TEMP_THERM_REG(sattr->index);
 513                break;
 514        case HYSTERSIS:
 515                if (sattr->index != 2)
 516                        reg = REG_REMOTE1_HYSTERSIS;
 517                else
 518                        reg = REG_REMOTE2_HYSTERSIS;
 519
 520                break;
 521        }
 522
 523        i2c_smbus_write_byte_data(client, reg, out);
 524
 525        mutex_unlock(&data->lock);
 526        return count;
 527}
 528
 529/*
 530 * Table of autorange values - the user will write the value in millidegrees,
 531 * and we'll convert it
 532 */
 533static const int autorange_table[] = {
 534        2000, 2500, 3330, 4000, 5000, 6670, 8000,
 535        10000, 13330, 16000, 20000, 26670, 32000, 40000,
 536        53330, 80000
 537};
 538
 539static ssize_t show_point2(struct device *dev, struct device_attribute *attr,
 540                           char *buf)
 541{
 542        struct adt7475_data *data = adt7475_update_device(dev);
 543        struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 544        int out, val;
 545
 546        mutex_lock(&data->lock);
 547        out = (data->range[sattr->index] >> 4) & 0x0F;
 548        val = reg2temp(data, data->temp[AUTOMIN][sattr->index]);
 549        mutex_unlock(&data->lock);
 550
 551        return sprintf(buf, "%d\n", val + autorange_table[out]);
 552}
 553
 554static ssize_t set_point2(struct device *dev, struct device_attribute *attr,
 555                          const char *buf, size_t count)
 556{
 557        struct i2c_client *client = to_i2c_client(dev);
 558        struct adt7475_data *data = i2c_get_clientdata(client);
 559        struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 560        int temp;
 561        long val;
 562
 563        if (kstrtol(buf, 10, &val))
 564                return -EINVAL;
 565
 566        mutex_lock(&data->lock);
 567
 568        /* Get a fresh copy of the needed registers */
 569        data->config5 = adt7475_read(REG_CONFIG5);
 570        data->temp[AUTOMIN][sattr->index] =
 571                adt7475_read(TEMP_TMIN_REG(sattr->index)) << 2;
 572        data->range[sattr->index] =
 573                adt7475_read(TEMP_TRANGE_REG(sattr->index));
 574
 575        /*
 576         * The user will write an absolute value, so subtract the start point
 577         * to figure the range
 578         */
 579        temp = reg2temp(data, data->temp[AUTOMIN][sattr->index]);
 580        val = SENSORS_LIMIT(val, temp + autorange_table[0],
 581                temp + autorange_table[ARRAY_SIZE(autorange_table) - 1]);
 582        val -= temp;
 583
 584        /* Find the nearest table entry to what the user wrote */
 585        val = find_nearest(val, autorange_table, ARRAY_SIZE(autorange_table));
 586
 587        data->range[sattr->index] &= ~0xF0;
 588        data->range[sattr->index] |= val << 4;
 589
 590        i2c_smbus_write_byte_data(client, TEMP_TRANGE_REG(sattr->index),
 591                                  data->range[sattr->index]);
 592
 593        mutex_unlock(&data->lock);
 594        return count;
 595}
 596
 597static ssize_t show_tach(struct device *dev, struct device_attribute *attr,
 598                         char *buf)
 599{
 600        struct adt7475_data *data = adt7475_update_device(dev);
 601        struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 602        int out;
 603
 604        if (sattr->nr == ALARM)
 605                out = (data->alarms >> (sattr->index + 10)) & 1;
 606        else
 607                out = tach2rpm(data->tach[sattr->nr][sattr->index]);
 608
 609        return sprintf(buf, "%d\n", out);
 610}
 611
 612static ssize_t set_tach(struct device *dev, struct device_attribute *attr,
 613                        const char *buf, size_t count)
 614{
 615
 616        struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 617        struct i2c_client *client = to_i2c_client(dev);
 618        struct adt7475_data *data = i2c_get_clientdata(client);
 619        unsigned long val;
 620
 621        if (kstrtoul(buf, 10, &val))
 622                return -EINVAL;
 623
 624        mutex_lock(&data->lock);
 625
 626        data->tach[MIN][sattr->index] = rpm2tach(val);
 627
 628        adt7475_write_word(client, TACH_MIN_REG(sattr->index),
 629                           data->tach[MIN][sattr->index]);
 630
 631        mutex_unlock(&data->lock);
 632        return count;
 633}
 634
 635static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
 636                        char *buf)
 637{
 638        struct adt7475_data *data = adt7475_update_device(dev);
 639        struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 640
 641        return sprintf(buf, "%d\n", data->pwm[sattr->nr][sattr->index]);
 642}
 643
 644static ssize_t show_pwmchan(struct device *dev, struct device_attribute *attr,
 645                            char *buf)
 646{
 647        struct adt7475_data *data = adt7475_update_device(dev);
 648        struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 649
 650        return sprintf(buf, "%d\n", data->pwmchan[sattr->index]);
 651}
 652
 653static ssize_t show_pwmctrl(struct device *dev, struct device_attribute *attr,
 654                            char *buf)
 655{
 656        struct adt7475_data *data = adt7475_update_device(dev);
 657        struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 658
 659        return sprintf(buf, "%d\n", data->pwmctl[sattr->index]);
 660}
 661
 662static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
 663                       const char *buf, size_t count)
 664{
 665
 666        struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 667        struct i2c_client *client = to_i2c_client(dev);
 668        struct adt7475_data *data = i2c_get_clientdata(client);
 669        unsigned char reg = 0;
 670        long val;
 671
 672        if (kstrtol(buf, 10, &val))
 673                return -EINVAL;
 674
 675        mutex_lock(&data->lock);
 676
 677        switch (sattr->nr) {
 678        case INPUT:
 679                /* Get a fresh value for CONTROL */
 680                data->pwm[CONTROL][sattr->index] =
 681                        adt7475_read(PWM_CONFIG_REG(sattr->index));
 682
 683                /*
 684                 * If we are not in manual mode, then we shouldn't allow
 685                 * the user to set the pwm speed
 686                 */
 687                if (((data->pwm[CONTROL][sattr->index] >> 5) & 7) != 7) {
 688                        mutex_unlock(&data->lock);
 689                        return count;
 690                }
 691
 692                reg = PWM_REG(sattr->index);
 693                break;
 694
 695        case MIN:
 696                reg = PWM_MIN_REG(sattr->index);
 697                break;
 698
 699        case MAX:
 700                reg = PWM_MAX_REG(sattr->index);
 701                break;
 702        }
 703
 704        data->pwm[sattr->nr][sattr->index] = SENSORS_LIMIT(val, 0, 0xFF);
 705        i2c_smbus_write_byte_data(client, reg,
 706                                  data->pwm[sattr->nr][sattr->index]);
 707
 708        mutex_unlock(&data->lock);
 709
 710        return count;
 711}
 712
 713/* Called by set_pwmctrl and set_pwmchan */
 714
 715static int hw_set_pwm(struct i2c_client *client, int index,
 716                      unsigned int pwmctl, unsigned int pwmchan)
 717{
 718        struct adt7475_data *data = i2c_get_clientdata(client);
 719        long val = 0;
 720
 721        switch (pwmctl) {
 722        case 0:
 723                val = 0x03;     /* Run at full speed */
 724                break;
 725        case 1:
 726                val = 0x07;     /* Manual mode */
 727                break;
 728        case 2:
 729                switch (pwmchan) {
 730                case 1:
 731                        /* Remote1 controls PWM */
 732                        val = 0x00;
 733                        break;
 734                case 2:
 735                        /* local controls PWM */
 736                        val = 0x01;
 737                        break;
 738                case 4:
 739                        /* remote2 controls PWM */
 740                        val = 0x02;
 741                        break;
 742                case 6:
 743                        /* local/remote2 control PWM */
 744                        val = 0x05;
 745                        break;
 746                case 7:
 747                        /* All three control PWM */
 748                        val = 0x06;
 749                        break;
 750                default:
 751                        return -EINVAL;
 752                }
 753                break;
 754        default:
 755                return -EINVAL;
 756        }
 757
 758        data->pwmctl[index] = pwmctl;
 759        data->pwmchan[index] = pwmchan;
 760
 761        data->pwm[CONTROL][index] &= ~0xE0;
 762        data->pwm[CONTROL][index] |= (val & 7) << 5;
 763
 764        i2c_smbus_write_byte_data(client, PWM_CONFIG_REG(index),
 765                                  data->pwm[CONTROL][index]);
 766
 767        return 0;
 768}
 769
 770static ssize_t set_pwmchan(struct device *dev, struct device_attribute *attr,
 771                           const char *buf, size_t count)
 772{
 773        struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 774        struct i2c_client *client = to_i2c_client(dev);
 775        struct adt7475_data *data = i2c_get_clientdata(client);
 776        int r;
 777        long val;
 778
 779        if (kstrtol(buf, 10, &val))
 780                return -EINVAL;
 781
 782        mutex_lock(&data->lock);
 783        /* Read Modify Write PWM values */
 784        adt7475_read_pwm(client, sattr->index);
 785        r = hw_set_pwm(client, sattr->index, data->pwmctl[sattr->index], val);
 786        if (r)
 787                count = r;
 788        mutex_unlock(&data->lock);
 789
 790        return count;
 791}
 792
 793static ssize_t set_pwmctrl(struct device *dev, struct device_attribute *attr,
 794                           const char *buf, size_t count)
 795{
 796        struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 797        struct i2c_client *client = to_i2c_client(dev);
 798        struct adt7475_data *data = i2c_get_clientdata(client);
 799        int r;
 800        long val;
 801
 802        if (kstrtol(buf, 10, &val))
 803                return -EINVAL;
 804
 805        mutex_lock(&data->lock);
 806        /* Read Modify Write PWM values */
 807        adt7475_read_pwm(client, sattr->index);
 808        r = hw_set_pwm(client, sattr->index, val, data->pwmchan[sattr->index]);
 809        if (r)
 810                count = r;
 811        mutex_unlock(&data->lock);
 812
 813        return count;
 814}
 815
 816/* List of frequencies for the PWM */
 817static const int pwmfreq_table[] = {
 818        11, 14, 22, 29, 35, 44, 58, 88
 819};
 820
 821static ssize_t show_pwmfreq(struct device *dev, struct device_attribute *attr,
 822                            char *buf)
 823{
 824        struct adt7475_data *data = adt7475_update_device(dev);
 825        struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 826
 827        return sprintf(buf, "%d\n",
 828                       pwmfreq_table[data->range[sattr->index] & 7]);
 829}
 830
 831static ssize_t set_pwmfreq(struct device *dev, struct device_attribute *attr,
 832                           const char *buf, size_t count)
 833{
 834        struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
 835        struct i2c_client *client = to_i2c_client(dev);
 836        struct adt7475_data *data = i2c_get_clientdata(client);
 837        int out;
 838        long val;
 839
 840        if (kstrtol(buf, 10, &val))
 841                return -EINVAL;
 842
 843        out = find_nearest(val, pwmfreq_table, ARRAY_SIZE(pwmfreq_table));
 844
 845        mutex_lock(&data->lock);
 846
 847        data->range[sattr->index] =
 848                adt7475_read(TEMP_TRANGE_REG(sattr->index));
 849        data->range[sattr->index] &= ~7;
 850        data->range[sattr->index] |= out;
 851
 852        i2c_smbus_write_byte_data(client, TEMP_TRANGE_REG(sattr->index),
 853                                  data->range[sattr->index]);
 854
 855        mutex_unlock(&data->lock);
 856        return count;
 857}
 858
 859static ssize_t show_pwm_at_crit(struct device *dev,
 860                                struct device_attribute *devattr, char *buf)
 861{
 862        struct adt7475_data *data = adt7475_update_device(dev);
 863        return sprintf(buf, "%d\n", !!(data->config4 & CONFIG4_MAXDUTY));
 864}
 865
 866static ssize_t set_pwm_at_crit(struct device *dev,
 867                               struct device_attribute *devattr,
 868                               const char *buf, size_t count)
 869{
 870        struct i2c_client *client = to_i2c_client(dev);
 871        struct adt7475_data *data = i2c_get_clientdata(client);
 872        long val;
 873
 874        if (kstrtol(buf, 10, &val))
 875                return -EINVAL;
 876        if (val != 0 && val != 1)
 877                return -EINVAL;
 878
 879        mutex_lock(&data->lock);
 880        data->config4 = i2c_smbus_read_byte_data(client, REG_CONFIG4);
 881        if (val)
 882                data->config4 |= CONFIG4_MAXDUTY;
 883        else
 884                data->config4 &= ~CONFIG4_MAXDUTY;
 885        i2c_smbus_write_byte_data(client, REG_CONFIG4, data->config4);
 886        mutex_unlock(&data->lock);
 887
 888        return count;
 889}
 890
 891static ssize_t show_vrm(struct device *dev, struct device_attribute *devattr,
 892                        char *buf)
 893{
 894        struct adt7475_data *data = dev_get_drvdata(dev);
 895        return sprintf(buf, "%d\n", (int)data->vrm);
 896}
 897
 898static ssize_t set_vrm(struct device *dev, struct device_attribute *devattr,
 899                       const char *buf, size_t count)
 900{
 901        struct adt7475_data *data = dev_get_drvdata(dev);
 902        long val;
 903
 904        if (kstrtol(buf, 10, &val))
 905                return -EINVAL;
 906        if (val < 0 || val > 255)
 907                return -EINVAL;
 908        data->vrm = val;
 909
 910        return count;
 911}
 912
 913static ssize_t show_vid(struct device *dev, struct device_attribute *devattr,
 914                        char *buf)
 915{
 916        struct adt7475_data *data = adt7475_update_device(dev);
 917        return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
 918}
 919
 920static SENSOR_DEVICE_ATTR_2(in0_input, S_IRUGO, show_voltage, NULL, INPUT, 0);
 921static SENSOR_DEVICE_ATTR_2(in0_max, S_IRUGO | S_IWUSR, show_voltage,
 922                            set_voltage, MAX, 0);
 923static SENSOR_DEVICE_ATTR_2(in0_min, S_IRUGO | S_IWUSR, show_voltage,
 924                            set_voltage, MIN, 0);
 925static SENSOR_DEVICE_ATTR_2(in0_alarm, S_IRUGO, show_voltage, NULL, ALARM, 0);
 926static SENSOR_DEVICE_ATTR_2(in1_input, S_IRUGO, show_voltage, NULL, INPUT, 1);
 927static SENSOR_DEVICE_ATTR_2(in1_max, S_IRUGO | S_IWUSR, show_voltage,
 928                            set_voltage, MAX, 1);
 929static SENSOR_DEVICE_ATTR_2(in1_min, S_IRUGO | S_IWUSR, show_voltage,
 930                            set_voltage, MIN, 1);
 931static SENSOR_DEVICE_ATTR_2(in1_alarm, S_IRUGO, show_voltage, NULL, ALARM, 1);
 932static SENSOR_DEVICE_ATTR_2(in2_input, S_IRUGO, show_voltage, NULL, INPUT, 2);
 933static SENSOR_DEVICE_ATTR_2(in2_max, S_IRUGO | S_IWUSR, show_voltage,
 934                            set_voltage, MAX, 2);
 935static SENSOR_DEVICE_ATTR_2(in2_min, S_IRUGO | S_IWUSR, show_voltage,
 936                            set_voltage, MIN, 2);
 937static SENSOR_DEVICE_ATTR_2(in2_alarm, S_IRUGO, show_voltage, NULL, ALARM, 2);
 938static SENSOR_DEVICE_ATTR_2(in3_input, S_IRUGO, show_voltage, NULL, INPUT, 3);
 939static SENSOR_DEVICE_ATTR_2(in3_max, S_IRUGO | S_IWUSR, show_voltage,
 940                            set_voltage, MAX, 3);
 941static SENSOR_DEVICE_ATTR_2(in3_min, S_IRUGO | S_IWUSR, show_voltage,
 942                            set_voltage, MIN, 3);
 943static SENSOR_DEVICE_ATTR_2(in3_alarm, S_IRUGO, show_voltage, NULL, ALARM, 3);
 944static SENSOR_DEVICE_ATTR_2(in4_input, S_IRUGO, show_voltage, NULL, INPUT, 4);
 945static SENSOR_DEVICE_ATTR_2(in4_max, S_IRUGO | S_IWUSR, show_voltage,
 946                            set_voltage, MAX, 4);
 947static SENSOR_DEVICE_ATTR_2(in4_min, S_IRUGO | S_IWUSR, show_voltage,
 948                            set_voltage, MIN, 4);
 949static SENSOR_DEVICE_ATTR_2(in4_alarm, S_IRUGO, show_voltage, NULL, ALARM, 8);
 950static SENSOR_DEVICE_ATTR_2(in5_input, S_IRUGO, show_voltage, NULL, INPUT, 5);
 951static SENSOR_DEVICE_ATTR_2(in5_max, S_IRUGO | S_IWUSR, show_voltage,
 952                            set_voltage, MAX, 5);
 953static SENSOR_DEVICE_ATTR_2(in5_min, S_IRUGO | S_IWUSR, show_voltage,
 954                            set_voltage, MIN, 5);
 955static SENSOR_DEVICE_ATTR_2(in5_alarm, S_IRUGO, show_voltage, NULL, ALARM, 31);
 956static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, INPUT, 0);
 957static SENSOR_DEVICE_ATTR_2(temp1_alarm, S_IRUGO, show_temp, NULL, ALARM, 0);
 958static SENSOR_DEVICE_ATTR_2(temp1_fault, S_IRUGO, show_temp, NULL, FAULT, 0);
 959static SENSOR_DEVICE_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
 960                            MAX, 0);
 961static SENSOR_DEVICE_ATTR_2(temp1_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
 962                            MIN, 0);
 963static SENSOR_DEVICE_ATTR_2(temp1_offset, S_IRUGO | S_IWUSR, show_temp,
 964                            set_temp, OFFSET, 0);
 965static SENSOR_DEVICE_ATTR_2(temp1_auto_point1_temp, S_IRUGO | S_IWUSR,
 966                            show_temp, set_temp, AUTOMIN, 0);
 967static SENSOR_DEVICE_ATTR_2(temp1_auto_point2_temp, S_IRUGO | S_IWUSR,
 968                            show_point2, set_point2, 0, 0);
 969static SENSOR_DEVICE_ATTR_2(temp1_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
 970                            THERM, 0);
 971static SENSOR_DEVICE_ATTR_2(temp1_crit_hyst, S_IRUGO | S_IWUSR, show_temp,
 972                            set_temp, HYSTERSIS, 0);
 973static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, INPUT, 1);
 974static SENSOR_DEVICE_ATTR_2(temp2_alarm, S_IRUGO, show_temp, NULL, ALARM, 1);
 975static SENSOR_DEVICE_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
 976                            MAX, 1);
 977static SENSOR_DEVICE_ATTR_2(temp2_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
 978                            MIN, 1);
 979static SENSOR_DEVICE_ATTR_2(temp2_offset, S_IRUGO | S_IWUSR, show_temp,
 980                            set_temp, OFFSET, 1);
 981static SENSOR_DEVICE_ATTR_2(temp2_auto_point1_temp, S_IRUGO | S_IWUSR,
 982                            show_temp, set_temp, AUTOMIN, 1);
 983static SENSOR_DEVICE_ATTR_2(temp2_auto_point2_temp, S_IRUGO | S_IWUSR,
 984                            show_point2, set_point2, 0, 1);
 985static SENSOR_DEVICE_ATTR_2(temp2_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
 986                            THERM, 1);
 987static SENSOR_DEVICE_ATTR_2(temp2_crit_hyst, S_IRUGO | S_IWUSR, show_temp,
 988                            set_temp, HYSTERSIS, 1);
 989static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp, NULL, INPUT, 2);
 990static SENSOR_DEVICE_ATTR_2(temp3_alarm, S_IRUGO, show_temp, NULL, ALARM, 2);
 991static SENSOR_DEVICE_ATTR_2(temp3_fault, S_IRUGO, show_temp, NULL, FAULT, 2);
 992static SENSOR_DEVICE_ATTR_2(temp3_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
 993                            MAX, 2);
 994static SENSOR_DEVICE_ATTR_2(temp3_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
 995                            MIN, 2);
 996static SENSOR_DEVICE_ATTR_2(temp3_offset, S_IRUGO | S_IWUSR, show_temp,
 997                            set_temp, OFFSET, 2);
 998static SENSOR_DEVICE_ATTR_2(temp3_auto_point1_temp, S_IRUGO | S_IWUSR,
 999                            show_temp, set_temp, AUTOMIN, 2);
1000static SENSOR_DEVICE_ATTR_2(temp3_auto_point2_temp, S_IRUGO | S_IWUSR,
1001                            show_point2, set_point2, 0, 2);
1002static SENSOR_DEVICE_ATTR_2(temp3_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
1003                            THERM, 2);
1004static SENSOR_DEVICE_ATTR_2(temp3_crit_hyst, S_IRUGO | S_IWUSR, show_temp,
1005                            set_temp, HYSTERSIS, 2);
1006static SENSOR_DEVICE_ATTR_2(fan1_input, S_IRUGO, show_tach, NULL, INPUT, 0);
1007static SENSOR_DEVICE_ATTR_2(fan1_min, S_IRUGO | S_IWUSR, show_tach, set_tach,
1008                            MIN, 0);
1009static SENSOR_DEVICE_ATTR_2(fan1_alarm, S_IRUGO, show_tach, NULL, ALARM, 0);
1010static SENSOR_DEVICE_ATTR_2(fan2_input, S_IRUGO, show_tach, NULL, INPUT, 1);
1011static SENSOR_DEVICE_ATTR_2(fan2_min, S_IRUGO | S_IWUSR, show_tach, set_tach,
1012                            MIN, 1);
1013static SENSOR_DEVICE_ATTR_2(fan2_alarm, S_IRUGO, show_tach, NULL, ALARM, 1);
1014static SENSOR_DEVICE_ATTR_2(fan3_input, S_IRUGO, show_tach, NULL, INPUT, 2);
1015static SENSOR_DEVICE_ATTR_2(fan3_min, S_IRUGO | S_IWUSR, show_tach, set_tach,
1016                            MIN, 2);
1017static SENSOR_DEVICE_ATTR_2(fan3_alarm, S_IRUGO, show_tach, NULL, ALARM, 2);
1018static SENSOR_DEVICE_ATTR_2(fan4_input, S_IRUGO, show_tach, NULL, INPUT, 3);
1019static SENSOR_DEVICE_ATTR_2(fan4_min, S_IRUGO | S_IWUSR, show_tach, set_tach,
1020                            MIN, 3);
1021static SENSOR_DEVICE_ATTR_2(fan4_alarm, S_IRUGO, show_tach, NULL, ALARM, 3);
1022static SENSOR_DEVICE_ATTR_2(pwm1, S_IRUGO | S_IWUSR, show_pwm, set_pwm, INPUT,
1023                            0);
1024static SENSOR_DEVICE_ATTR_2(pwm1_freq, S_IRUGO | S_IWUSR, show_pwmfreq,
1025                            set_pwmfreq, INPUT, 0);
1026static SENSOR_DEVICE_ATTR_2(pwm1_enable, S_IRUGO | S_IWUSR, show_pwmctrl,
1027                            set_pwmctrl, INPUT, 0);
1028static SENSOR_DEVICE_ATTR_2(pwm1_auto_channels_temp, S_IRUGO | S_IWUSR,
1029                            show_pwmchan, set_pwmchan, INPUT, 0);
1030static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_pwm, S_IRUGO | S_IWUSR, show_pwm,
1031                            set_pwm, MIN, 0);
1032static SENSOR_DEVICE_ATTR_2(pwm1_auto_point2_pwm, S_IRUGO | S_IWUSR, show_pwm,
1033                            set_pwm, MAX, 0);
1034static SENSOR_DEVICE_ATTR_2(pwm2, S_IRUGO | S_IWUSR, show_pwm, set_pwm, INPUT,
1035                            1);
1036static SENSOR_DEVICE_ATTR_2(pwm2_freq, S_IRUGO | S_IWUSR, show_pwmfreq,
1037                            set_pwmfreq, INPUT, 1);
1038static SENSOR_DEVICE_ATTR_2(pwm2_enable, S_IRUGO | S_IWUSR, show_pwmctrl,
1039                            set_pwmctrl, INPUT, 1);
1040static SENSOR_DEVICE_ATTR_2(pwm2_auto_channels_temp, S_IRUGO | S_IWUSR,
1041                            show_pwmchan, set_pwmchan, INPUT, 1);
1042static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_pwm, S_IRUGO | S_IWUSR, show_pwm,
1043                            set_pwm, MIN, 1);
1044static SENSOR_DEVICE_ATTR_2(pwm2_auto_point2_pwm, S_IRUGO | S_IWUSR, show_pwm,
1045                            set_pwm, MAX, 1);
1046static SENSOR_DEVICE_ATTR_2(pwm3, S_IRUGO | S_IWUSR, show_pwm, set_pwm, INPUT,
1047                            2);
1048static SENSOR_DEVICE_ATTR_2(pwm3_freq, S_IRUGO | S_IWUSR, show_pwmfreq,
1049                            set_pwmfreq, INPUT, 2);
1050static SENSOR_DEVICE_ATTR_2(pwm3_enable, S_IRUGO | S_IWUSR, show_pwmctrl,
1051                            set_pwmctrl, INPUT, 2);
1052static SENSOR_DEVICE_ATTR_2(pwm3_auto_channels_temp, S_IRUGO | S_IWUSR,
1053                            show_pwmchan, set_pwmchan, INPUT, 2);
1054static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_pwm, S_IRUGO | S_IWUSR, show_pwm,
1055                            set_pwm, MIN, 2);
1056static SENSOR_DEVICE_ATTR_2(pwm3_auto_point2_pwm, S_IRUGO | S_IWUSR, show_pwm,
1057                            set_pwm, MAX, 2);
1058
1059/* Non-standard name, might need revisiting */
1060static DEVICE_ATTR(pwm_use_point2_pwm_at_crit, S_IWUSR | S_IRUGO,
1061                   show_pwm_at_crit, set_pwm_at_crit);
1062
1063static DEVICE_ATTR(vrm, S_IWUSR | S_IRUGO, show_vrm, set_vrm);
1064static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
1065
1066static struct attribute *adt7475_attrs[] = {
1067        &sensor_dev_attr_in1_input.dev_attr.attr,
1068        &sensor_dev_attr_in1_max.dev_attr.attr,
1069        &sensor_dev_attr_in1_min.dev_attr.attr,
1070        &sensor_dev_attr_in1_alarm.dev_attr.attr,
1071        &sensor_dev_attr_in2_input.dev_attr.attr,
1072        &sensor_dev_attr_in2_max.dev_attr.attr,
1073        &sensor_dev_attr_in2_min.dev_attr.attr,
1074        &sensor_dev_attr_in2_alarm.dev_attr.attr,
1075        &sensor_dev_attr_temp1_input.dev_attr.attr,
1076        &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1077        &sensor_dev_attr_temp1_fault.dev_attr.attr,
1078        &sensor_dev_attr_temp1_max.dev_attr.attr,
1079        &sensor_dev_attr_temp1_min.dev_attr.attr,
1080        &sensor_dev_attr_temp1_offset.dev_attr.attr,
1081        &sensor_dev_attr_temp1_auto_point1_temp.dev_attr.attr,
1082        &sensor_dev_attr_temp1_auto_point2_temp.dev_attr.attr,
1083        &sensor_dev_attr_temp1_crit.dev_attr.attr,
1084        &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
1085        &sensor_dev_attr_temp2_input.dev_attr.attr,
1086        &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1087        &sensor_dev_attr_temp2_max.dev_attr.attr,
1088        &sensor_dev_attr_temp2_min.dev_attr.attr,
1089        &sensor_dev_attr_temp2_offset.dev_attr.attr,
1090        &sensor_dev_attr_temp2_auto_point1_temp.dev_attr.attr,
1091        &sensor_dev_attr_temp2_auto_point2_temp.dev_attr.attr,
1092        &sensor_dev_attr_temp2_crit.dev_attr.attr,
1093        &sensor_dev_attr_temp2_crit_hyst.dev_attr.attr,
1094        &sensor_dev_attr_temp3_input.dev_attr.attr,
1095        &sensor_dev_attr_temp3_fault.dev_attr.attr,
1096        &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1097        &sensor_dev_attr_temp3_max.dev_attr.attr,
1098        &sensor_dev_attr_temp3_min.dev_attr.attr,
1099        &sensor_dev_attr_temp3_offset.dev_attr.attr,
1100        &sensor_dev_attr_temp3_auto_point1_temp.dev_attr.attr,
1101        &sensor_dev_attr_temp3_auto_point2_temp.dev_attr.attr,
1102        &sensor_dev_attr_temp3_crit.dev_attr.attr,
1103        &sensor_dev_attr_temp3_crit_hyst.dev_attr.attr,
1104        &sensor_dev_attr_fan1_input.dev_attr.attr,
1105        &sensor_dev_attr_fan1_min.dev_attr.attr,
1106        &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1107        &sensor_dev_attr_fan2_input.dev_attr.attr,
1108        &sensor_dev_attr_fan2_min.dev_attr.attr,
1109        &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1110        &sensor_dev_attr_fan3_input.dev_attr.attr,
1111        &sensor_dev_attr_fan3_min.dev_attr.attr,
1112        &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1113        &sensor_dev_attr_pwm1.dev_attr.attr,
1114        &sensor_dev_attr_pwm1_freq.dev_attr.attr,
1115        &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1116        &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1117        &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1118        &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1119        &sensor_dev_attr_pwm3.dev_attr.attr,
1120        &sensor_dev_attr_pwm3_freq.dev_attr.attr,
1121        &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1122        &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1123        &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1124        &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1125        &dev_attr_pwm_use_point2_pwm_at_crit.attr,
1126        NULL,
1127};
1128
1129static struct attribute *fan4_attrs[] = {
1130        &sensor_dev_attr_fan4_input.dev_attr.attr,
1131        &sensor_dev_attr_fan4_min.dev_attr.attr,
1132        &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1133        NULL
1134};
1135
1136static struct attribute *pwm2_attrs[] = {
1137        &sensor_dev_attr_pwm2.dev_attr.attr,
1138        &sensor_dev_attr_pwm2_freq.dev_attr.attr,
1139        &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1140        &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1141        &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1142        &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1143        NULL
1144};
1145
1146static struct attribute *in0_attrs[] = {
1147        &sensor_dev_attr_in0_input.dev_attr.attr,
1148        &sensor_dev_attr_in0_max.dev_attr.attr,
1149        &sensor_dev_attr_in0_min.dev_attr.attr,
1150        &sensor_dev_attr_in0_alarm.dev_attr.attr,
1151        NULL
1152};
1153
1154static struct attribute *in3_attrs[] = {
1155        &sensor_dev_attr_in3_input.dev_attr.attr,
1156        &sensor_dev_attr_in3_max.dev_attr.attr,
1157        &sensor_dev_attr_in3_min.dev_attr.attr,
1158        &sensor_dev_attr_in3_alarm.dev_attr.attr,
1159        NULL
1160};
1161
1162static struct attribute *in4_attrs[] = {
1163        &sensor_dev_attr_in4_input.dev_attr.attr,
1164        &sensor_dev_attr_in4_max.dev_attr.attr,
1165        &sensor_dev_attr_in4_min.dev_attr.attr,
1166        &sensor_dev_attr_in4_alarm.dev_attr.attr,
1167        NULL
1168};
1169
1170static struct attribute *in5_attrs[] = {
1171        &sensor_dev_attr_in5_input.dev_attr.attr,
1172        &sensor_dev_attr_in5_max.dev_attr.attr,
1173        &sensor_dev_attr_in5_min.dev_attr.attr,
1174        &sensor_dev_attr_in5_alarm.dev_attr.attr,
1175        NULL
1176};
1177
1178static struct attribute *vid_attrs[] = {
1179        &dev_attr_cpu0_vid.attr,
1180        &dev_attr_vrm.attr,
1181        NULL
1182};
1183
1184static struct attribute_group adt7475_attr_group = { .attrs = adt7475_attrs };
1185static struct attribute_group fan4_attr_group = { .attrs = fan4_attrs };
1186static struct attribute_group pwm2_attr_group = { .attrs = pwm2_attrs };
1187static struct attribute_group in0_attr_group = { .attrs = in0_attrs };
1188static struct attribute_group in3_attr_group = { .attrs = in3_attrs };
1189static struct attribute_group in4_attr_group = { .attrs = in4_attrs };
1190static struct attribute_group in5_attr_group = { .attrs = in5_attrs };
1191static struct attribute_group vid_attr_group = { .attrs = vid_attrs };
1192
1193static int adt7475_detect(struct i2c_client *client,
1194                          struct i2c_board_info *info)
1195{
1196        struct i2c_adapter *adapter = client->adapter;
1197        int vendid, devid, devid2;
1198        const char *name;
1199
1200        if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1201                return -ENODEV;
1202
1203        vendid = adt7475_read(REG_VENDID);
1204        devid2 = adt7475_read(REG_DEVID2);
1205        if (vendid != 0x41 ||           /* Analog Devices */
1206            (devid2 & 0xf8) != 0x68)
1207                return -ENODEV;
1208
1209        devid = adt7475_read(REG_DEVID);
1210        if (devid == 0x73)
1211                name = "adt7473";
1212        else if (devid == 0x75 && client->addr == 0x2e)
1213                name = "adt7475";
1214        else if (devid == 0x76)
1215                name = "adt7476";
1216        else if ((devid2 & 0xfc) == 0x6c)
1217                name = "adt7490";
1218        else {
1219                dev_dbg(&adapter->dev,
1220                        "Couldn't detect an ADT7473/75/76/90 part at "
1221                        "0x%02x\n", (unsigned int)client->addr);
1222                return -ENODEV;
1223        }
1224
1225        strlcpy(info->type, name, I2C_NAME_SIZE);
1226
1227        return 0;
1228}
1229
1230static void adt7475_remove_files(struct i2c_client *client,
1231                                 struct adt7475_data *data)
1232{
1233        sysfs_remove_group(&client->dev.kobj, &adt7475_attr_group);
1234        if (data->has_fan4)
1235                sysfs_remove_group(&client->dev.kobj, &fan4_attr_group);
1236        if (data->has_pwm2)
1237                sysfs_remove_group(&client->dev.kobj, &pwm2_attr_group);
1238        if (data->has_voltage & (1 << 0))
1239                sysfs_remove_group(&client->dev.kobj, &in0_attr_group);
1240        if (data->has_voltage & (1 << 3))
1241                sysfs_remove_group(&client->dev.kobj, &in3_attr_group);
1242        if (data->has_voltage & (1 << 4))
1243                sysfs_remove_group(&client->dev.kobj, &in4_attr_group);
1244        if (data->has_voltage & (1 << 5))
1245                sysfs_remove_group(&client->dev.kobj, &in5_attr_group);
1246        if (data->has_vid)
1247                sysfs_remove_group(&client->dev.kobj, &vid_attr_group);
1248}
1249
1250static int adt7475_probe(struct i2c_client *client,
1251                         const struct i2c_device_id *id)
1252{
1253        static const char * const names[] = {
1254                [adt7473] = "ADT7473",
1255                [adt7475] = "ADT7475",
1256                [adt7476] = "ADT7476",
1257                [adt7490] = "ADT7490",
1258        };
1259
1260        struct adt7475_data *data;
1261        int i, ret = 0, revision;
1262        u8 config2, config3;
1263
1264        data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
1265        if (data == NULL)
1266                return -ENOMEM;
1267
1268        mutex_init(&data->lock);
1269        i2c_set_clientdata(client, data);
1270
1271        /* Initialize device-specific values */
1272        switch (id->driver_data) {
1273        case adt7476:
1274                data->has_voltage = 0x0e;       /* in1 to in3 */
1275                revision = adt7475_read(REG_DEVID2) & 0x07;
1276                break;
1277        case adt7490:
1278                data->has_voltage = 0x3e;       /* in1 to in5 */
1279                revision = adt7475_read(REG_DEVID2) & 0x03;
1280                if (revision == 0x03)
1281                        revision += adt7475_read(REG_DEVREV2);
1282                break;
1283        default:
1284                data->has_voltage = 0x06;       /* in1, in2 */
1285                revision = adt7475_read(REG_DEVID2) & 0x07;
1286        }
1287
1288        config3 = adt7475_read(REG_CONFIG3);
1289        /* Pin PWM2 may alternatively be used for ALERT output */
1290        if (!(config3 & CONFIG3_SMBALERT))
1291                data->has_pwm2 = 1;
1292        /* Meaning of this bit is inverted for the ADT7473-1 */
1293        if (id->driver_data == adt7473 && revision >= 1)
1294                data->has_pwm2 = !data->has_pwm2;
1295
1296        data->config4 = adt7475_read(REG_CONFIG4);
1297        /* Pin TACH4 may alternatively be used for THERM */
1298        if ((data->config4 & CONFIG4_PINFUNC) == 0x0)
1299                data->has_fan4 = 1;
1300
1301        /*
1302         * THERM configuration is more complex on the ADT7476 and ADT7490,
1303         * because 2 different pins (TACH4 and +2.5 Vin) can be used for
1304         * this function
1305         */
1306        if (id->driver_data == adt7490) {
1307                if ((data->config4 & CONFIG4_PINFUNC) == 0x1 &&
1308                    !(config3 & CONFIG3_THERM))
1309                        data->has_fan4 = 1;
1310        }
1311        if (id->driver_data == adt7476 || id->driver_data == adt7490) {
1312                if (!(config3 & CONFIG3_THERM) ||
1313                    (data->config4 & CONFIG4_PINFUNC) == 0x1)
1314                        data->has_voltage |= (1 << 0);          /* in0 */
1315        }
1316
1317        /*
1318         * On the ADT7476, the +12V input pin may instead be used as VID5,
1319         * and VID pins may alternatively be used as GPIO
1320         */
1321        if (id->driver_data == adt7476) {
1322                u8 vid = adt7475_read(REG_VID);
1323                if (!(vid & VID_VIDSEL))
1324                        data->has_voltage |= (1 << 4);          /* in4 */
1325
1326                data->has_vid = !(adt7475_read(REG_CONFIG5) & CONFIG5_VIDGPIO);
1327        }
1328
1329        /* Voltage attenuators can be bypassed, globally or individually */
1330        config2 = adt7475_read(REG_CONFIG2);
1331        if (config2 & CONFIG2_ATTN) {
1332                data->bypass_attn = (0x3 << 3) | 0x3;
1333        } else {
1334                data->bypass_attn = ((data->config4 & CONFIG4_ATTN_IN10) >> 4) |
1335                                    ((data->config4 & CONFIG4_ATTN_IN43) >> 3);
1336        }
1337        data->bypass_attn &= data->has_voltage;
1338
1339        /*
1340         * Call adt7475_read_pwm for all pwm's as this will reprogram any
1341         * pwm's which are disabled to manual mode with 0% duty cycle
1342         */
1343        for (i = 0; i < ADT7475_PWM_COUNT; i++)
1344                adt7475_read_pwm(client, i);
1345
1346        ret = sysfs_create_group(&client->dev.kobj, &adt7475_attr_group);
1347        if (ret)
1348                return ret;
1349
1350        /* Features that can be disabled individually */
1351        if (data->has_fan4) {
1352                ret = sysfs_create_group(&client->dev.kobj, &fan4_attr_group);
1353                if (ret)
1354                        goto eremove;
1355        }
1356        if (data->has_pwm2) {
1357                ret = sysfs_create_group(&client->dev.kobj, &pwm2_attr_group);
1358                if (ret)
1359                        goto eremove;
1360        }
1361        if (data->has_voltage & (1 << 0)) {
1362                ret = sysfs_create_group(&client->dev.kobj, &in0_attr_group);
1363                if (ret)
1364                        goto eremove;
1365        }
1366        if (data->has_voltage & (1 << 3)) {
1367                ret = sysfs_create_group(&client->dev.kobj, &in3_attr_group);
1368                if (ret)
1369                        goto eremove;
1370        }
1371        if (data->has_voltage & (1 << 4)) {
1372                ret = sysfs_create_group(&client->dev.kobj, &in4_attr_group);
1373                if (ret)
1374                        goto eremove;
1375        }
1376        if (data->has_voltage & (1 << 5)) {
1377                ret = sysfs_create_group(&client->dev.kobj, &in5_attr_group);
1378                if (ret)
1379                        goto eremove;
1380        }
1381        if (data->has_vid) {
1382                data->vrm = vid_which_vrm();
1383                ret = sysfs_create_group(&client->dev.kobj, &vid_attr_group);
1384                if (ret)
1385                        goto eremove;
1386        }
1387
1388        data->hwmon_dev = hwmon_device_register(&client->dev);
1389        if (IS_ERR(data->hwmon_dev)) {
1390                ret = PTR_ERR(data->hwmon_dev);
1391                goto eremove;
1392        }
1393
1394        dev_info(&client->dev, "%s device, revision %d\n",
1395                 names[id->driver_data], revision);
1396        if ((data->has_voltage & 0x11) || data->has_fan4 || data->has_pwm2)
1397                dev_info(&client->dev, "Optional features:%s%s%s%s%s\n",
1398                         (data->has_voltage & (1 << 0)) ? " in0" : "",
1399                         (data->has_voltage & (1 << 4)) ? " in4" : "",
1400                         data->has_fan4 ? " fan4" : "",
1401                         data->has_pwm2 ? " pwm2" : "",
1402                         data->has_vid ? " vid" : "");
1403        if (data->bypass_attn)
1404                dev_info(&client->dev, "Bypassing attenuators on:%s%s%s%s\n",
1405                         (data->bypass_attn & (1 << 0)) ? " in0" : "",
1406                         (data->bypass_attn & (1 << 1)) ? " in1" : "",
1407                         (data->bypass_attn & (1 << 3)) ? " in3" : "",
1408                         (data->bypass_attn & (1 << 4)) ? " in4" : "");
1409
1410        return 0;
1411
1412eremove:
1413        adt7475_remove_files(client, data);
1414        return ret;
1415}
1416
1417static int adt7475_remove(struct i2c_client *client)
1418{
1419        struct adt7475_data *data = i2c_get_clientdata(client);
1420
1421        hwmon_device_unregister(data->hwmon_dev);
1422        adt7475_remove_files(client, data);
1423
1424        return 0;
1425}
1426
1427static struct i2c_driver adt7475_driver = {
1428        .class          = I2C_CLASS_HWMON,
1429        .driver = {
1430                .name   = "adt7475",
1431        },
1432        .probe          = adt7475_probe,
1433        .remove         = adt7475_remove,
1434        .id_table       = adt7475_id,
1435        .detect         = adt7475_detect,
1436        .address_list   = normal_i2c,
1437};
1438
1439static void adt7475_read_hystersis(struct i2c_client *client)
1440{
1441        struct adt7475_data *data = i2c_get_clientdata(client);
1442
1443        data->temp[HYSTERSIS][0] = (u16) adt7475_read(REG_REMOTE1_HYSTERSIS);
1444        data->temp[HYSTERSIS][1] = data->temp[HYSTERSIS][0];
1445        data->temp[HYSTERSIS][2] = (u16) adt7475_read(REG_REMOTE2_HYSTERSIS);
1446}
1447
1448static void adt7475_read_pwm(struct i2c_client *client, int index)
1449{
1450        struct adt7475_data *data = i2c_get_clientdata(client);
1451        unsigned int v;
1452
1453        data->pwm[CONTROL][index] = adt7475_read(PWM_CONFIG_REG(index));
1454
1455        /*
1456         * Figure out the internal value for pwmctrl and pwmchan
1457         * based on the current settings
1458         */
1459        v = (data->pwm[CONTROL][index] >> 5) & 7;
1460
1461        if (v == 3)
1462                data->pwmctl[index] = 0;
1463        else if (v == 7)
1464                data->pwmctl[index] = 1;
1465        else if (v == 4) {
1466                /*
1467                 * The fan is disabled - we don't want to
1468                 * support that, so change to manual mode and
1469                 * set the duty cycle to 0 instead
1470                 */
1471                data->pwm[INPUT][index] = 0;
1472                data->pwm[CONTROL][index] &= ~0xE0;
1473                data->pwm[CONTROL][index] |= (7 << 5);
1474
1475                i2c_smbus_write_byte_data(client, PWM_CONFIG_REG(index),
1476                                          data->pwm[INPUT][index]);
1477
1478                i2c_smbus_write_byte_data(client, PWM_CONFIG_REG(index),
1479                                          data->pwm[CONTROL][index]);
1480
1481                data->pwmctl[index] = 1;
1482        } else {
1483                data->pwmctl[index] = 2;
1484
1485                switch (v) {
1486                case 0:
1487                        data->pwmchan[index] = 1;
1488                        break;
1489                case 1:
1490                        data->pwmchan[index] = 2;
1491                        break;
1492                case 2:
1493                        data->pwmchan[index] = 4;
1494                        break;
1495                case 5:
1496                        data->pwmchan[index] = 6;
1497                        break;
1498                case 6:
1499                        data->pwmchan[index] = 7;
1500                        break;
1501                }
1502        }
1503}
1504
1505static struct adt7475_data *adt7475_update_device(struct device *dev)
1506{
1507        struct i2c_client *client = to_i2c_client(dev);
1508        struct adt7475_data *data = i2c_get_clientdata(client);
1509        u16 ext;
1510        int i;
1511
1512        mutex_lock(&data->lock);
1513
1514        /* Measurement values update every 2 seconds */
1515        if (time_after(jiffies, data->measure_updated + HZ * 2) ||
1516            !data->valid) {
1517                data->alarms = adt7475_read(REG_STATUS2) << 8;
1518                data->alarms |= adt7475_read(REG_STATUS1);
1519
1520                ext = (adt7475_read(REG_EXTEND2) << 8) |
1521                        adt7475_read(REG_EXTEND1);
1522                for (i = 0; i < ADT7475_VOLTAGE_COUNT; i++) {
1523                        if (!(data->has_voltage & (1 << i)))
1524                                continue;
1525                        data->voltage[INPUT][i] =
1526                                (adt7475_read(VOLTAGE_REG(i)) << 2) |
1527                                ((ext >> (i * 2)) & 3);
1528                }
1529
1530                for (i = 0; i < ADT7475_TEMP_COUNT; i++)
1531                        data->temp[INPUT][i] =
1532                                (adt7475_read(TEMP_REG(i)) << 2) |
1533                                ((ext >> ((i + 5) * 2)) & 3);
1534
1535                if (data->has_voltage & (1 << 5)) {
1536                        data->alarms |= adt7475_read(REG_STATUS4) << 24;
1537                        ext = adt7475_read(REG_EXTEND3);
1538                        data->voltage[INPUT][5] = adt7475_read(REG_VTT) << 2 |
1539                                ((ext >> 4) & 3);
1540                }
1541
1542                for (i = 0; i < ADT7475_TACH_COUNT; i++) {
1543                        if (i == 3 && !data->has_fan4)
1544                                continue;
1545                        data->tach[INPUT][i] =
1546                                adt7475_read_word(client, TACH_REG(i));
1547                }
1548
1549                /* Updated by hw when in auto mode */
1550                for (i = 0; i < ADT7475_PWM_COUNT; i++) {
1551                        if (i == 1 && !data->has_pwm2)
1552                                continue;
1553                        data->pwm[INPUT][i] = adt7475_read(PWM_REG(i));
1554                }
1555
1556                if (data->has_vid)
1557                        data->vid = adt7475_read(REG_VID) & 0x3f;
1558
1559                data->measure_updated = jiffies;
1560        }
1561
1562        /* Limits and settings, should never change update every 60 seconds */
1563        if (time_after(jiffies, data->limits_updated + HZ * 60) ||
1564            !data->valid) {
1565                data->config4 = adt7475_read(REG_CONFIG4);
1566                data->config5 = adt7475_read(REG_CONFIG5);
1567
1568                for (i = 0; i < ADT7475_VOLTAGE_COUNT; i++) {
1569                        if (!(data->has_voltage & (1 << i)))
1570                                continue;
1571                        /* Adjust values so they match the input precision */
1572                        data->voltage[MIN][i] =
1573                                adt7475_read(VOLTAGE_MIN_REG(i)) << 2;
1574                        data->voltage[MAX][i] =
1575                                adt7475_read(VOLTAGE_MAX_REG(i)) << 2;
1576                }
1577
1578                if (data->has_voltage & (1 << 5)) {
1579                        data->voltage[MIN][5] = adt7475_read(REG_VTT_MIN) << 2;
1580                        data->voltage[MAX][5] = adt7475_read(REG_VTT_MAX) << 2;
1581                }
1582
1583                for (i = 0; i < ADT7475_TEMP_COUNT; i++) {
1584                        /* Adjust values so they match the input precision */
1585                        data->temp[MIN][i] =
1586                                adt7475_read(TEMP_MIN_REG(i)) << 2;
1587                        data->temp[MAX][i] =
1588                                adt7475_read(TEMP_MAX_REG(i)) << 2;
1589                        data->temp[AUTOMIN][i] =
1590                                adt7475_read(TEMP_TMIN_REG(i)) << 2;
1591                        data->temp[THERM][i] =
1592                                adt7475_read(TEMP_THERM_REG(i)) << 2;
1593                        data->temp[OFFSET][i] =
1594                                adt7475_read(TEMP_OFFSET_REG(i));
1595                }
1596                adt7475_read_hystersis(client);
1597
1598                for (i = 0; i < ADT7475_TACH_COUNT; i++) {
1599                        if (i == 3 && !data->has_fan4)
1600                                continue;
1601                        data->tach[MIN][i] =
1602                                adt7475_read_word(client, TACH_MIN_REG(i));
1603                }
1604
1605                for (i = 0; i < ADT7475_PWM_COUNT; i++) {
1606                        if (i == 1 && !data->has_pwm2)
1607                                continue;
1608                        data->pwm[MAX][i] = adt7475_read(PWM_MAX_REG(i));
1609                        data->pwm[MIN][i] = adt7475_read(PWM_MIN_REG(i));
1610                        /* Set the channel and control information */
1611                        adt7475_read_pwm(client, i);
1612                }
1613
1614                data->range[0] = adt7475_read(TEMP_TRANGE_REG(0));
1615                data->range[1] = adt7475_read(TEMP_TRANGE_REG(1));
1616                data->range[2] = adt7475_read(TEMP_TRANGE_REG(2));
1617
1618                data->limits_updated = jiffies;
1619                data->valid = 1;
1620        }
1621
1622        mutex_unlock(&data->lock);
1623
1624        return data;
1625}
1626
1627module_i2c_driver(adt7475_driver);
1628
1629MODULE_AUTHOR("Advanced Micro Devices, Inc");
1630MODULE_DESCRIPTION("adt7475 driver");
1631MODULE_LICENSE("GPL");
1632
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