linux/drivers/hwmon/ftsteutates.c
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   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * Support for the FTS Systemmonitoring Chip "Teutates"
   4 *
   5 * Copyright (C) 2016 Fujitsu Technology Solutions GmbH,
   6 *                Thilo Cestonaro <thilo.cestonaro@ts.fujitsu.com>
   7 */
   8#include <linux/err.h>
   9#include <linux/fs.h>
  10#include <linux/hwmon.h>
  11#include <linux/hwmon-sysfs.h>
  12#include <linux/i2c.h>
  13#include <linux/init.h>
  14#include <linux/jiffies.h>
  15#include <linux/module.h>
  16#include <linux/mutex.h>
  17#include <linux/slab.h>
  18#include <linux/sysfs.h>
  19#include <linux/uaccess.h>
  20#include <linux/watchdog.h>
  21
  22#define FTS_DEVICE_ID_REG               0x0000
  23#define FTS_DEVICE_REVISION_REG         0x0001
  24#define FTS_DEVICE_STATUS_REG           0x0004
  25#define FTS_SATELLITE_STATUS_REG        0x0005
  26#define FTS_EVENT_STATUS_REG            0x0006
  27#define FTS_GLOBAL_CONTROL_REG          0x0007
  28
  29#define FTS_DEVICE_DETECT_REG_1         0x0C
  30#define FTS_DEVICE_DETECT_REG_2         0x0D
  31#define FTS_DEVICE_DETECT_REG_3         0x0E
  32
  33#define FTS_SENSOR_EVENT_REG            0x0010
  34
  35#define FTS_FAN_EVENT_REG               0x0014
  36#define FTS_FAN_PRESENT_REG             0x0015
  37
  38#define FTS_POWER_ON_TIME_COUNTER_A     0x007A
  39#define FTS_POWER_ON_TIME_COUNTER_B     0x007B
  40#define FTS_POWER_ON_TIME_COUNTER_C     0x007C
  41
  42#define FTS_PAGE_SELECT_REG             0x007F
  43
  44#define FTS_WATCHDOG_TIME_PRESET        0x000B
  45#define FTS_WATCHDOG_CONTROL            0x5081
  46
  47#define FTS_NO_FAN_SENSORS              0x08
  48#define FTS_NO_TEMP_SENSORS             0x10
  49#define FTS_NO_VOLT_SENSORS             0x04
  50
  51static const unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END };
  52
  53static const struct i2c_device_id fts_id[] = {
  54        { "ftsteutates", 0 },
  55        { }
  56};
  57MODULE_DEVICE_TABLE(i2c, fts_id);
  58
  59enum WATCHDOG_RESOLUTION {
  60        seconds = 1,
  61        minutes = 60
  62};
  63
  64struct fts_data {
  65        struct i2c_client *client;
  66        /* update sensor data lock */
  67        struct mutex update_lock;
  68        /* read/write register lock */
  69        struct mutex access_lock;
  70        unsigned long last_updated; /* in jiffies */
  71        struct watchdog_device wdd;
  72        enum WATCHDOG_RESOLUTION resolution;
  73        bool valid; /* false until following fields are valid */
  74
  75        u8 volt[FTS_NO_VOLT_SENSORS];
  76
  77        u8 temp_input[FTS_NO_TEMP_SENSORS];
  78        u8 temp_alarm;
  79
  80        u8 fan_present;
  81        u8 fan_input[FTS_NO_FAN_SENSORS]; /* in rps */
  82        u8 fan_source[FTS_NO_FAN_SENSORS];
  83        u8 fan_alarm;
  84};
  85
  86#define FTS_REG_FAN_INPUT(idx) ((idx) + 0x20)
  87#define FTS_REG_FAN_SOURCE(idx) ((idx) + 0x30)
  88#define FTS_REG_FAN_CONTROL(idx) (((idx) << 16) + 0x4881)
  89
  90#define FTS_REG_TEMP_INPUT(idx) ((idx) + 0x40)
  91#define FTS_REG_TEMP_CONTROL(idx) (((idx) << 16) + 0x0681)
  92
  93#define FTS_REG_VOLT(idx) ((idx) + 0x18)
  94
  95/*****************************************************************************/
  96/* I2C Helper functions                                                      */
  97/*****************************************************************************/
  98static int fts_read_byte(struct i2c_client *client, unsigned short reg)
  99{
 100        int ret;
 101        unsigned char page = reg >> 8;
 102        struct fts_data *data = dev_get_drvdata(&client->dev);
 103
 104        mutex_lock(&data->access_lock);
 105
 106        dev_dbg(&client->dev, "page select - page: 0x%.02x\n", page);
 107        ret = i2c_smbus_write_byte_data(client, FTS_PAGE_SELECT_REG, page);
 108        if (ret < 0)
 109                goto error;
 110
 111        reg &= 0xFF;
 112        ret = i2c_smbus_read_byte_data(client, reg);
 113        dev_dbg(&client->dev, "read - reg: 0x%.02x: val: 0x%.02x\n", reg, ret);
 114
 115error:
 116        mutex_unlock(&data->access_lock);
 117        return ret;
 118}
 119
 120static int fts_write_byte(struct i2c_client *client, unsigned short reg,
 121                          unsigned char value)
 122{
 123        int ret;
 124        unsigned char page = reg >> 8;
 125        struct fts_data *data = dev_get_drvdata(&client->dev);
 126
 127        mutex_lock(&data->access_lock);
 128
 129        dev_dbg(&client->dev, "page select - page: 0x%.02x\n", page);
 130        ret = i2c_smbus_write_byte_data(client, FTS_PAGE_SELECT_REG, page);
 131        if (ret < 0)
 132                goto error;
 133
 134        reg &= 0xFF;
 135        dev_dbg(&client->dev,
 136                "write - reg: 0x%.02x: val: 0x%.02x\n", reg, value);
 137        ret = i2c_smbus_write_byte_data(client, reg, value);
 138
 139error:
 140        mutex_unlock(&data->access_lock);
 141        return ret;
 142}
 143
 144/*****************************************************************************/
 145/* Data Updater Helper function                                              */
 146/*****************************************************************************/
 147static int fts_update_device(struct fts_data *data)
 148{
 149        int i;
 150        int err = 0;
 151
 152        mutex_lock(&data->update_lock);
 153        if (!time_after(jiffies, data->last_updated + 2 * HZ) && data->valid)
 154                goto exit;
 155
 156        err = fts_read_byte(data->client, FTS_DEVICE_STATUS_REG);
 157        if (err < 0)
 158                goto exit;
 159
 160        data->valid = !!(err & 0x02); /* Data not ready yet */
 161        if (unlikely(!data->valid)) {
 162                err = -EAGAIN;
 163                goto exit;
 164        }
 165
 166        err = fts_read_byte(data->client, FTS_FAN_PRESENT_REG);
 167        if (err < 0)
 168                goto exit;
 169        data->fan_present = err;
 170
 171        err = fts_read_byte(data->client, FTS_FAN_EVENT_REG);
 172        if (err < 0)
 173                goto exit;
 174        data->fan_alarm = err;
 175
 176        for (i = 0; i < FTS_NO_FAN_SENSORS; i++) {
 177                if (data->fan_present & BIT(i)) {
 178                        err = fts_read_byte(data->client, FTS_REG_FAN_INPUT(i));
 179                        if (err < 0)
 180                                goto exit;
 181                        data->fan_input[i] = err;
 182
 183                        err = fts_read_byte(data->client,
 184                                            FTS_REG_FAN_SOURCE(i));
 185                        if (err < 0)
 186                                goto exit;
 187                        data->fan_source[i] = err;
 188                } else {
 189                        data->fan_input[i] = 0;
 190                        data->fan_source[i] = 0;
 191                }
 192        }
 193
 194        err = fts_read_byte(data->client, FTS_SENSOR_EVENT_REG);
 195        if (err < 0)
 196                goto exit;
 197        data->temp_alarm = err;
 198
 199        for (i = 0; i < FTS_NO_TEMP_SENSORS; i++) {
 200                err = fts_read_byte(data->client, FTS_REG_TEMP_INPUT(i));
 201                if (err < 0)
 202                        goto exit;
 203                data->temp_input[i] = err;
 204        }
 205
 206        for (i = 0; i < FTS_NO_VOLT_SENSORS; i++) {
 207                err = fts_read_byte(data->client, FTS_REG_VOLT(i));
 208                if (err < 0)
 209                        goto exit;
 210                data->volt[i] = err;
 211        }
 212        data->last_updated = jiffies;
 213        err = 0;
 214exit:
 215        mutex_unlock(&data->update_lock);
 216        return err;
 217}
 218
 219/*****************************************************************************/
 220/* Watchdog functions                                                        */
 221/*****************************************************************************/
 222static int fts_wd_set_resolution(struct fts_data *data,
 223                                 enum WATCHDOG_RESOLUTION resolution)
 224{
 225        int ret;
 226
 227        if (data->resolution == resolution)
 228                return 0;
 229
 230        ret = fts_read_byte(data->client, FTS_WATCHDOG_CONTROL);
 231        if (ret < 0)
 232                return ret;
 233
 234        if ((resolution == seconds && ret & BIT(1)) ||
 235            (resolution == minutes && (ret & BIT(1)) == 0)) {
 236                data->resolution = resolution;
 237                return 0;
 238        }
 239
 240        if (resolution == seconds)
 241                ret |= BIT(1);
 242        else
 243                ret &= ~BIT(1);
 244
 245        ret = fts_write_byte(data->client, FTS_WATCHDOG_CONTROL, ret);
 246        if (ret < 0)
 247                return ret;
 248
 249        data->resolution = resolution;
 250        return ret;
 251}
 252
 253static int fts_wd_set_timeout(struct watchdog_device *wdd, unsigned int timeout)
 254{
 255        struct fts_data *data;
 256        enum WATCHDOG_RESOLUTION resolution = seconds;
 257        int ret;
 258
 259        data = watchdog_get_drvdata(wdd);
 260        /* switch watchdog resolution to minutes if timeout does not fit
 261         * into a byte
 262         */
 263        if (timeout > 0xFF) {
 264                timeout = DIV_ROUND_UP(timeout, 60) * 60;
 265                resolution = minutes;
 266        }
 267
 268        ret = fts_wd_set_resolution(data, resolution);
 269        if (ret < 0)
 270                return ret;
 271
 272        wdd->timeout = timeout;
 273        return 0;
 274}
 275
 276static int fts_wd_start(struct watchdog_device *wdd)
 277{
 278        struct fts_data *data = watchdog_get_drvdata(wdd);
 279
 280        return fts_write_byte(data->client, FTS_WATCHDOG_TIME_PRESET,
 281                              wdd->timeout / (u8)data->resolution);
 282}
 283
 284static int fts_wd_stop(struct watchdog_device *wdd)
 285{
 286        struct fts_data *data;
 287
 288        data = watchdog_get_drvdata(wdd);
 289        return fts_write_byte(data->client, FTS_WATCHDOG_TIME_PRESET, 0);
 290}
 291
 292static const struct watchdog_info fts_wd_info = {
 293        .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE,
 294        .identity = "FTS Teutates Hardware Watchdog",
 295};
 296
 297static const struct watchdog_ops fts_wd_ops = {
 298        .owner = THIS_MODULE,
 299        .start = fts_wd_start,
 300        .stop = fts_wd_stop,
 301        .set_timeout = fts_wd_set_timeout,
 302};
 303
 304static int fts_watchdog_init(struct fts_data *data)
 305{
 306        int timeout, ret;
 307
 308        watchdog_set_drvdata(&data->wdd, data);
 309
 310        timeout = fts_read_byte(data->client, FTS_WATCHDOG_TIME_PRESET);
 311        if (timeout < 0)
 312                return timeout;
 313
 314        /* watchdog not running, set timeout to a default of 60 sec. */
 315        if (timeout == 0) {
 316                ret = fts_wd_set_resolution(data, seconds);
 317                if (ret < 0)
 318                        return ret;
 319                data->wdd.timeout = 60;
 320        } else {
 321                ret = fts_read_byte(data->client, FTS_WATCHDOG_CONTROL);
 322                if (ret < 0)
 323                        return ret;
 324
 325                data->resolution = ret & BIT(1) ? seconds : minutes;
 326                data->wdd.timeout = timeout * (u8)data->resolution;
 327                set_bit(WDOG_HW_RUNNING, &data->wdd.status);
 328        }
 329
 330        /* Register our watchdog part */
 331        data->wdd.info = &fts_wd_info;
 332        data->wdd.ops = &fts_wd_ops;
 333        data->wdd.parent = &data->client->dev;
 334        data->wdd.min_timeout = 1;
 335
 336        /* max timeout 255 minutes. */
 337        data->wdd.max_hw_heartbeat_ms = 0xFF * 60 * MSEC_PER_SEC;
 338
 339        return watchdog_register_device(&data->wdd);
 340}
 341
 342/*****************************************************************************/
 343/* SysFS handler functions                                                   */
 344/*****************************************************************************/
 345static ssize_t in_value_show(struct device *dev,
 346                             struct device_attribute *devattr, char *buf)
 347{
 348        struct fts_data *data = dev_get_drvdata(dev);
 349        int index = to_sensor_dev_attr(devattr)->index;
 350        int err;
 351
 352        err = fts_update_device(data);
 353        if (err < 0)
 354                return err;
 355
 356        return sprintf(buf, "%u\n", data->volt[index]);
 357}
 358
 359static ssize_t temp_value_show(struct device *dev,
 360                               struct device_attribute *devattr, char *buf)
 361{
 362        struct fts_data *data = dev_get_drvdata(dev);
 363        int index = to_sensor_dev_attr(devattr)->index;
 364        int err;
 365
 366        err = fts_update_device(data);
 367        if (err < 0)
 368                return err;
 369
 370        return sprintf(buf, "%u\n", data->temp_input[index]);
 371}
 372
 373static ssize_t temp_fault_show(struct device *dev,
 374                               struct device_attribute *devattr, char *buf)
 375{
 376        struct fts_data *data = dev_get_drvdata(dev);
 377        int index = to_sensor_dev_attr(devattr)->index;
 378        int err;
 379
 380        err = fts_update_device(data);
 381        if (err < 0)
 382                return err;
 383
 384        /* 00h Temperature = Sensor Error */
 385        return sprintf(buf, "%d\n", data->temp_input[index] == 0);
 386}
 387
 388static ssize_t temp_alarm_show(struct device *dev,
 389                               struct device_attribute *devattr, char *buf)
 390{
 391        struct fts_data *data = dev_get_drvdata(dev);
 392        int index = to_sensor_dev_attr(devattr)->index;
 393        int err;
 394
 395        err = fts_update_device(data);
 396        if (err < 0)
 397                return err;
 398
 399        return sprintf(buf, "%u\n", !!(data->temp_alarm & BIT(index)));
 400}
 401
 402static ssize_t
 403temp_alarm_store(struct device *dev, struct device_attribute *devattr,
 404                 const char *buf, size_t count)
 405{
 406        struct fts_data *data = dev_get_drvdata(dev);
 407        int index = to_sensor_dev_attr(devattr)->index;
 408        long ret;
 409
 410        ret = fts_update_device(data);
 411        if (ret < 0)
 412                return ret;
 413
 414        if (kstrtoul(buf, 10, &ret) || ret != 0)
 415                return -EINVAL;
 416
 417        mutex_lock(&data->update_lock);
 418        ret = fts_read_byte(data->client, FTS_REG_TEMP_CONTROL(index));
 419        if (ret < 0)
 420                goto error;
 421
 422        ret = fts_write_byte(data->client, FTS_REG_TEMP_CONTROL(index),
 423                             ret | 0x1);
 424        if (ret < 0)
 425                goto error;
 426
 427        data->valid = false;
 428        ret = count;
 429error:
 430        mutex_unlock(&data->update_lock);
 431        return ret;
 432}
 433
 434static ssize_t fan_value_show(struct device *dev,
 435                              struct device_attribute *devattr, char *buf)
 436{
 437        struct fts_data *data = dev_get_drvdata(dev);
 438        int index = to_sensor_dev_attr(devattr)->index;
 439        int err;
 440
 441        err = fts_update_device(data);
 442        if (err < 0)
 443                return err;
 444
 445        return sprintf(buf, "%u\n", data->fan_input[index]);
 446}
 447
 448static ssize_t fan_source_show(struct device *dev,
 449                               struct device_attribute *devattr, char *buf)
 450{
 451        struct fts_data *data = dev_get_drvdata(dev);
 452        int index = to_sensor_dev_attr(devattr)->index;
 453        int err;
 454
 455        err = fts_update_device(data);
 456        if (err < 0)
 457                return err;
 458
 459        return sprintf(buf, "%u\n", data->fan_source[index]);
 460}
 461
 462static ssize_t fan_alarm_show(struct device *dev,
 463                              struct device_attribute *devattr, char *buf)
 464{
 465        struct fts_data *data = dev_get_drvdata(dev);
 466        int index = to_sensor_dev_attr(devattr)->index;
 467        int err;
 468
 469        err = fts_update_device(data);
 470        if (err < 0)
 471                return err;
 472
 473        return sprintf(buf, "%d\n", !!(data->fan_alarm & BIT(index)));
 474}
 475
 476static ssize_t
 477fan_alarm_store(struct device *dev, struct device_attribute *devattr,
 478                const char *buf, size_t count)
 479{
 480        struct fts_data *data = dev_get_drvdata(dev);
 481        int index = to_sensor_dev_attr(devattr)->index;
 482        long ret;
 483
 484        ret = fts_update_device(data);
 485        if (ret < 0)
 486                return ret;
 487
 488        if (kstrtoul(buf, 10, &ret) || ret != 0)
 489                return -EINVAL;
 490
 491        mutex_lock(&data->update_lock);
 492        ret = fts_read_byte(data->client, FTS_REG_FAN_CONTROL(index));
 493        if (ret < 0)
 494                goto error;
 495
 496        ret = fts_write_byte(data->client, FTS_REG_FAN_CONTROL(index),
 497                             ret | 0x1);
 498        if (ret < 0)
 499                goto error;
 500
 501        data->valid = false;
 502        ret = count;
 503error:
 504        mutex_unlock(&data->update_lock);
 505        return ret;
 506}
 507
 508/*****************************************************************************/
 509/* SysFS structs                                                             */
 510/*****************************************************************************/
 511
 512/* Temprature sensors */
 513static SENSOR_DEVICE_ATTR_RO(temp1_input, temp_value, 0);
 514static SENSOR_DEVICE_ATTR_RO(temp2_input, temp_value, 1);
 515static SENSOR_DEVICE_ATTR_RO(temp3_input, temp_value, 2);
 516static SENSOR_DEVICE_ATTR_RO(temp4_input, temp_value, 3);
 517static SENSOR_DEVICE_ATTR_RO(temp5_input, temp_value, 4);
 518static SENSOR_DEVICE_ATTR_RO(temp6_input, temp_value, 5);
 519static SENSOR_DEVICE_ATTR_RO(temp7_input, temp_value, 6);
 520static SENSOR_DEVICE_ATTR_RO(temp8_input, temp_value, 7);
 521static SENSOR_DEVICE_ATTR_RO(temp9_input, temp_value, 8);
 522static SENSOR_DEVICE_ATTR_RO(temp10_input, temp_value, 9);
 523static SENSOR_DEVICE_ATTR_RO(temp11_input, temp_value, 10);
 524static SENSOR_DEVICE_ATTR_RO(temp12_input, temp_value, 11);
 525static SENSOR_DEVICE_ATTR_RO(temp13_input, temp_value, 12);
 526static SENSOR_DEVICE_ATTR_RO(temp14_input, temp_value, 13);
 527static SENSOR_DEVICE_ATTR_RO(temp15_input, temp_value, 14);
 528static SENSOR_DEVICE_ATTR_RO(temp16_input, temp_value, 15);
 529
 530static SENSOR_DEVICE_ATTR_RO(temp1_fault, temp_fault, 0);
 531static SENSOR_DEVICE_ATTR_RO(temp2_fault, temp_fault, 1);
 532static SENSOR_DEVICE_ATTR_RO(temp3_fault, temp_fault, 2);
 533static SENSOR_DEVICE_ATTR_RO(temp4_fault, temp_fault, 3);
 534static SENSOR_DEVICE_ATTR_RO(temp5_fault, temp_fault, 4);
 535static SENSOR_DEVICE_ATTR_RO(temp6_fault, temp_fault, 5);
 536static SENSOR_DEVICE_ATTR_RO(temp7_fault, temp_fault, 6);
 537static SENSOR_DEVICE_ATTR_RO(temp8_fault, temp_fault, 7);
 538static SENSOR_DEVICE_ATTR_RO(temp9_fault, temp_fault, 8);
 539static SENSOR_DEVICE_ATTR_RO(temp10_fault, temp_fault, 9);
 540static SENSOR_DEVICE_ATTR_RO(temp11_fault, temp_fault, 10);
 541static SENSOR_DEVICE_ATTR_RO(temp12_fault, temp_fault, 11);
 542static SENSOR_DEVICE_ATTR_RO(temp13_fault, temp_fault, 12);
 543static SENSOR_DEVICE_ATTR_RO(temp14_fault, temp_fault, 13);
 544static SENSOR_DEVICE_ATTR_RO(temp15_fault, temp_fault, 14);
 545static SENSOR_DEVICE_ATTR_RO(temp16_fault, temp_fault, 15);
 546
 547static SENSOR_DEVICE_ATTR_RW(temp1_alarm, temp_alarm, 0);
 548static SENSOR_DEVICE_ATTR_RW(temp2_alarm, temp_alarm, 1);
 549static SENSOR_DEVICE_ATTR_RW(temp3_alarm, temp_alarm, 2);
 550static SENSOR_DEVICE_ATTR_RW(temp4_alarm, temp_alarm, 3);
 551static SENSOR_DEVICE_ATTR_RW(temp5_alarm, temp_alarm, 4);
 552static SENSOR_DEVICE_ATTR_RW(temp6_alarm, temp_alarm, 5);
 553static SENSOR_DEVICE_ATTR_RW(temp7_alarm, temp_alarm, 6);
 554static SENSOR_DEVICE_ATTR_RW(temp8_alarm, temp_alarm, 7);
 555static SENSOR_DEVICE_ATTR_RW(temp9_alarm, temp_alarm, 8);
 556static SENSOR_DEVICE_ATTR_RW(temp10_alarm, temp_alarm, 9);
 557static SENSOR_DEVICE_ATTR_RW(temp11_alarm, temp_alarm, 10);
 558static SENSOR_DEVICE_ATTR_RW(temp12_alarm, temp_alarm, 11);
 559static SENSOR_DEVICE_ATTR_RW(temp13_alarm, temp_alarm, 12);
 560static SENSOR_DEVICE_ATTR_RW(temp14_alarm, temp_alarm, 13);
 561static SENSOR_DEVICE_ATTR_RW(temp15_alarm, temp_alarm, 14);
 562static SENSOR_DEVICE_ATTR_RW(temp16_alarm, temp_alarm, 15);
 563
 564static struct attribute *fts_temp_attrs[] = {
 565        &sensor_dev_attr_temp1_input.dev_attr.attr,
 566        &sensor_dev_attr_temp2_input.dev_attr.attr,
 567        &sensor_dev_attr_temp3_input.dev_attr.attr,
 568        &sensor_dev_attr_temp4_input.dev_attr.attr,
 569        &sensor_dev_attr_temp5_input.dev_attr.attr,
 570        &sensor_dev_attr_temp6_input.dev_attr.attr,
 571        &sensor_dev_attr_temp7_input.dev_attr.attr,
 572        &sensor_dev_attr_temp8_input.dev_attr.attr,
 573        &sensor_dev_attr_temp9_input.dev_attr.attr,
 574        &sensor_dev_attr_temp10_input.dev_attr.attr,
 575        &sensor_dev_attr_temp11_input.dev_attr.attr,
 576        &sensor_dev_attr_temp12_input.dev_attr.attr,
 577        &sensor_dev_attr_temp13_input.dev_attr.attr,
 578        &sensor_dev_attr_temp14_input.dev_attr.attr,
 579        &sensor_dev_attr_temp15_input.dev_attr.attr,
 580        &sensor_dev_attr_temp16_input.dev_attr.attr,
 581
 582        &sensor_dev_attr_temp1_fault.dev_attr.attr,
 583        &sensor_dev_attr_temp2_fault.dev_attr.attr,
 584        &sensor_dev_attr_temp3_fault.dev_attr.attr,
 585        &sensor_dev_attr_temp4_fault.dev_attr.attr,
 586        &sensor_dev_attr_temp5_fault.dev_attr.attr,
 587        &sensor_dev_attr_temp6_fault.dev_attr.attr,
 588        &sensor_dev_attr_temp7_fault.dev_attr.attr,
 589        &sensor_dev_attr_temp8_fault.dev_attr.attr,
 590        &sensor_dev_attr_temp9_fault.dev_attr.attr,
 591        &sensor_dev_attr_temp10_fault.dev_attr.attr,
 592        &sensor_dev_attr_temp11_fault.dev_attr.attr,
 593        &sensor_dev_attr_temp12_fault.dev_attr.attr,
 594        &sensor_dev_attr_temp13_fault.dev_attr.attr,
 595        &sensor_dev_attr_temp14_fault.dev_attr.attr,
 596        &sensor_dev_attr_temp15_fault.dev_attr.attr,
 597        &sensor_dev_attr_temp16_fault.dev_attr.attr,
 598
 599        &sensor_dev_attr_temp1_alarm.dev_attr.attr,
 600        &sensor_dev_attr_temp2_alarm.dev_attr.attr,
 601        &sensor_dev_attr_temp3_alarm.dev_attr.attr,
 602        &sensor_dev_attr_temp4_alarm.dev_attr.attr,
 603        &sensor_dev_attr_temp5_alarm.dev_attr.attr,
 604        &sensor_dev_attr_temp6_alarm.dev_attr.attr,
 605        &sensor_dev_attr_temp7_alarm.dev_attr.attr,
 606        &sensor_dev_attr_temp8_alarm.dev_attr.attr,
 607        &sensor_dev_attr_temp9_alarm.dev_attr.attr,
 608        &sensor_dev_attr_temp10_alarm.dev_attr.attr,
 609        &sensor_dev_attr_temp11_alarm.dev_attr.attr,
 610        &sensor_dev_attr_temp12_alarm.dev_attr.attr,
 611        &sensor_dev_attr_temp13_alarm.dev_attr.attr,
 612        &sensor_dev_attr_temp14_alarm.dev_attr.attr,
 613        &sensor_dev_attr_temp15_alarm.dev_attr.attr,
 614        &sensor_dev_attr_temp16_alarm.dev_attr.attr,
 615        NULL
 616};
 617
 618/* Fans */
 619static SENSOR_DEVICE_ATTR_RO(fan1_input, fan_value, 0);
 620static SENSOR_DEVICE_ATTR_RO(fan2_input, fan_value, 1);
 621static SENSOR_DEVICE_ATTR_RO(fan3_input, fan_value, 2);
 622static SENSOR_DEVICE_ATTR_RO(fan4_input, fan_value, 3);
 623static SENSOR_DEVICE_ATTR_RO(fan5_input, fan_value, 4);
 624static SENSOR_DEVICE_ATTR_RO(fan6_input, fan_value, 5);
 625static SENSOR_DEVICE_ATTR_RO(fan7_input, fan_value, 6);
 626static SENSOR_DEVICE_ATTR_RO(fan8_input, fan_value, 7);
 627
 628static SENSOR_DEVICE_ATTR_RO(fan1_source, fan_source, 0);
 629static SENSOR_DEVICE_ATTR_RO(fan2_source, fan_source, 1);
 630static SENSOR_DEVICE_ATTR_RO(fan3_source, fan_source, 2);
 631static SENSOR_DEVICE_ATTR_RO(fan4_source, fan_source, 3);
 632static SENSOR_DEVICE_ATTR_RO(fan5_source, fan_source, 4);
 633static SENSOR_DEVICE_ATTR_RO(fan6_source, fan_source, 5);
 634static SENSOR_DEVICE_ATTR_RO(fan7_source, fan_source, 6);
 635static SENSOR_DEVICE_ATTR_RO(fan8_source, fan_source, 7);
 636
 637static SENSOR_DEVICE_ATTR_RW(fan1_alarm, fan_alarm, 0);
 638static SENSOR_DEVICE_ATTR_RW(fan2_alarm, fan_alarm, 1);
 639static SENSOR_DEVICE_ATTR_RW(fan3_alarm, fan_alarm, 2);
 640static SENSOR_DEVICE_ATTR_RW(fan4_alarm, fan_alarm, 3);
 641static SENSOR_DEVICE_ATTR_RW(fan5_alarm, fan_alarm, 4);
 642static SENSOR_DEVICE_ATTR_RW(fan6_alarm, fan_alarm, 5);
 643static SENSOR_DEVICE_ATTR_RW(fan7_alarm, fan_alarm, 6);
 644static SENSOR_DEVICE_ATTR_RW(fan8_alarm, fan_alarm, 7);
 645
 646static struct attribute *fts_fan_attrs[] = {
 647        &sensor_dev_attr_fan1_input.dev_attr.attr,
 648        &sensor_dev_attr_fan2_input.dev_attr.attr,
 649        &sensor_dev_attr_fan3_input.dev_attr.attr,
 650        &sensor_dev_attr_fan4_input.dev_attr.attr,
 651        &sensor_dev_attr_fan5_input.dev_attr.attr,
 652        &sensor_dev_attr_fan6_input.dev_attr.attr,
 653        &sensor_dev_attr_fan7_input.dev_attr.attr,
 654        &sensor_dev_attr_fan8_input.dev_attr.attr,
 655
 656        &sensor_dev_attr_fan1_source.dev_attr.attr,
 657        &sensor_dev_attr_fan2_source.dev_attr.attr,
 658        &sensor_dev_attr_fan3_source.dev_attr.attr,
 659        &sensor_dev_attr_fan4_source.dev_attr.attr,
 660        &sensor_dev_attr_fan5_source.dev_attr.attr,
 661        &sensor_dev_attr_fan6_source.dev_attr.attr,
 662        &sensor_dev_attr_fan7_source.dev_attr.attr,
 663        &sensor_dev_attr_fan8_source.dev_attr.attr,
 664
 665        &sensor_dev_attr_fan1_alarm.dev_attr.attr,
 666        &sensor_dev_attr_fan2_alarm.dev_attr.attr,
 667        &sensor_dev_attr_fan3_alarm.dev_attr.attr,
 668        &sensor_dev_attr_fan4_alarm.dev_attr.attr,
 669        &sensor_dev_attr_fan5_alarm.dev_attr.attr,
 670        &sensor_dev_attr_fan6_alarm.dev_attr.attr,
 671        &sensor_dev_attr_fan7_alarm.dev_attr.attr,
 672        &sensor_dev_attr_fan8_alarm.dev_attr.attr,
 673        NULL
 674};
 675
 676/* Voltages */
 677static SENSOR_DEVICE_ATTR_RO(in1_input, in_value, 0);
 678static SENSOR_DEVICE_ATTR_RO(in2_input, in_value, 1);
 679static SENSOR_DEVICE_ATTR_RO(in3_input, in_value, 2);
 680static SENSOR_DEVICE_ATTR_RO(in4_input, in_value, 3);
 681static struct attribute *fts_voltage_attrs[] = {
 682        &sensor_dev_attr_in1_input.dev_attr.attr,
 683        &sensor_dev_attr_in2_input.dev_attr.attr,
 684        &sensor_dev_attr_in3_input.dev_attr.attr,
 685        &sensor_dev_attr_in4_input.dev_attr.attr,
 686        NULL
 687};
 688
 689static const struct attribute_group fts_voltage_attr_group = {
 690        .attrs = fts_voltage_attrs
 691};
 692
 693static const struct attribute_group fts_temp_attr_group = {
 694        .attrs = fts_temp_attrs
 695};
 696
 697static const struct attribute_group fts_fan_attr_group = {
 698        .attrs = fts_fan_attrs
 699};
 700
 701static const struct attribute_group *fts_attr_groups[] = {
 702        &fts_voltage_attr_group,
 703        &fts_temp_attr_group,
 704        &fts_fan_attr_group,
 705        NULL
 706};
 707
 708/*****************************************************************************/
 709/* Module initialization / remove functions                                  */
 710/*****************************************************************************/
 711static int fts_detect(struct i2c_client *client,
 712                      struct i2c_board_info *info)
 713{
 714        int val;
 715
 716        /* detection works with revsion greater or equal to 0x2b */
 717        val = i2c_smbus_read_byte_data(client, FTS_DEVICE_REVISION_REG);
 718        if (val < 0x2b)
 719                return -ENODEV;
 720
 721        /* Device Detect Regs must have 0x17 0x34 and 0x54 */
 722        val = i2c_smbus_read_byte_data(client, FTS_DEVICE_DETECT_REG_1);
 723        if (val != 0x17)
 724                return -ENODEV;
 725
 726        val = i2c_smbus_read_byte_data(client, FTS_DEVICE_DETECT_REG_2);
 727        if (val != 0x34)
 728                return -ENODEV;
 729
 730        val = i2c_smbus_read_byte_data(client, FTS_DEVICE_DETECT_REG_3);
 731        if (val != 0x54)
 732                return -ENODEV;
 733
 734        /*
 735         * 0x10 == Baseboard Management Controller, 0x01 == Teutates
 736         * Device ID Reg needs to be 0x11
 737         */
 738        val = i2c_smbus_read_byte_data(client, FTS_DEVICE_ID_REG);
 739        if (val != 0x11)
 740                return -ENODEV;
 741
 742        strlcpy(info->type, fts_id[0].name, I2C_NAME_SIZE);
 743        info->flags = 0;
 744        return 0;
 745}
 746
 747static int fts_remove(struct i2c_client *client)
 748{
 749        struct fts_data *data = dev_get_drvdata(&client->dev);
 750
 751        watchdog_unregister_device(&data->wdd);
 752        return 0;
 753}
 754
 755static int fts_probe(struct i2c_client *client)
 756{
 757        u8 revision;
 758        struct fts_data *data;
 759        int err;
 760        s8 deviceid;
 761        struct device *hwmon_dev;
 762
 763        if (client->addr != 0x73)
 764                return -ENODEV;
 765
 766        /* Baseboard Management Controller check */
 767        deviceid = i2c_smbus_read_byte_data(client, FTS_DEVICE_ID_REG);
 768        if (deviceid > 0 && (deviceid & 0xF0) == 0x10) {
 769                switch (deviceid & 0x0F) {
 770                case 0x01:
 771                        break;
 772                default:
 773                        dev_dbg(&client->dev,
 774                                "No Baseboard Management Controller\n");
 775                        return -ENODEV;
 776                }
 777        } else {
 778                dev_dbg(&client->dev, "No fujitsu board\n");
 779                return -ENODEV;
 780        }
 781
 782        data = devm_kzalloc(&client->dev, sizeof(struct fts_data),
 783                            GFP_KERNEL);
 784        if (!data)
 785                return -ENOMEM;
 786
 787        mutex_init(&data->update_lock);
 788        mutex_init(&data->access_lock);
 789        data->client = client;
 790        dev_set_drvdata(&client->dev, data);
 791
 792        err = i2c_smbus_read_byte_data(client, FTS_DEVICE_REVISION_REG);
 793        if (err < 0)
 794                return err;
 795        revision = err;
 796
 797        hwmon_dev = devm_hwmon_device_register_with_groups(&client->dev,
 798                                                           "ftsteutates",
 799                                                           data,
 800                                                           fts_attr_groups);
 801        if (IS_ERR(hwmon_dev))
 802                return PTR_ERR(hwmon_dev);
 803
 804        err = fts_watchdog_init(data);
 805        if (err)
 806                return err;
 807
 808        dev_info(&client->dev, "Detected FTS Teutates chip, revision: %d.%d\n",
 809                 (revision & 0xF0) >> 4, revision & 0x0F);
 810        return 0;
 811}
 812
 813/*****************************************************************************/
 814/* Module Details                                                            */
 815/*****************************************************************************/
 816static struct i2c_driver fts_driver = {
 817        .class = I2C_CLASS_HWMON,
 818        .driver = {
 819                .name = "ftsteutates",
 820        },
 821        .id_table = fts_id,
 822        .probe_new = fts_probe,
 823        .remove = fts_remove,
 824        .detect = fts_detect,
 825        .address_list = normal_i2c,
 826};
 827
 828module_i2c_driver(fts_driver);
 829
 830MODULE_AUTHOR("Thilo Cestonaro <thilo.cestonaro@ts.fujitsu.com>");
 831MODULE_DESCRIPTION("FTS Teutates driver");
 832MODULE_LICENSE("GPL");
 833