root/drivers/hwmon/adt7470.c

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DEFINITIONS

This source file includes following definitions.
  1. adt7470_read_word_data
  2. adt7470_write_word_data
  3. adt7470_read_temperatures
  4. adt7470_update_thread
  5. adt7470_update_device
  6. auto_update_interval_show
  7. auto_update_interval_store
  8. num_temp_sensors_show
  9. num_temp_sensors_store
  10. temp_min_show
  11. temp_min_store
  12. temp_max_show
  13. temp_max_store
  14. temp_show
  15. alarm_mask_show
  16. alarm_mask_store
  17. fan_max_show
  18. fan_max_store
  19. fan_min_show
  20. fan_min_store
  21. fan_show
  22. force_pwm_max_show
  23. force_pwm_max_store
  24. pwm_show
  25. pwm_store
  26. pwm1_freq_show
  27. pwm1_freq_store
  28. pwm_max_show
  29. pwm_max_store
  30. pwm_min_show
  31. pwm_min_store
  32. pwm_tmax_show
  33. pwm_tmin_show
  34. pwm_tmin_store
  35. pwm_auto_show
  36. pwm_auto_store
  37. pwm_auto_temp_show
  38. cvt_auto_temp
  39. pwm_auto_temp_store
  40. alarm_show
  41. adt7470_detect
  42. adt7470_init_client
  43. adt7470_probe
  44. adt7470_remove

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * A hwmon driver for the Analog Devices ADT7470
   4  * Copyright (C) 2007 IBM
   5  *
   6  * Author: Darrick J. Wong <darrick.wong@oracle.com>
   7  */
   8 
   9 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  10 
  11 #include <linux/module.h>
  12 #include <linux/jiffies.h>
  13 #include <linux/i2c.h>
  14 #include <linux/hwmon.h>
  15 #include <linux/hwmon-sysfs.h>
  16 #include <linux/err.h>
  17 #include <linux/mutex.h>
  18 #include <linux/delay.h>
  19 #include <linux/log2.h>
  20 #include <linux/kthread.h>
  21 #include <linux/slab.h>
  22 #include <linux/util_macros.h>
  23 
  24 /* Addresses to scan */
  25 static const unsigned short normal_i2c[] = { 0x2C, 0x2E, 0x2F, I2C_CLIENT_END };
  26 
  27 /* ADT7470 registers */
  28 #define ADT7470_REG_BASE_ADDR                   0x20
  29 #define ADT7470_REG_TEMP_BASE_ADDR              0x20
  30 #define ADT7470_REG_TEMP_MAX_ADDR               0x29
  31 #define ADT7470_REG_FAN_BASE_ADDR               0x2A
  32 #define ADT7470_REG_FAN_MAX_ADDR                0x31
  33 #define ADT7470_REG_PWM_BASE_ADDR               0x32
  34 #define ADT7470_REG_PWM_MAX_ADDR                0x35
  35 #define ADT7470_REG_PWM_MAX_BASE_ADDR           0x38
  36 #define ADT7470_REG_PWM_MAX_MAX_ADDR            0x3B
  37 #define ADT7470_REG_CFG                         0x40
  38 #define         ADT7470_FSPD_MASK               0x04
  39 #define ADT7470_REG_ALARM1                      0x41
  40 #define         ADT7470_R1T_ALARM               0x01
  41 #define         ADT7470_R2T_ALARM               0x02
  42 #define         ADT7470_R3T_ALARM               0x04
  43 #define         ADT7470_R4T_ALARM               0x08
  44 #define         ADT7470_R5T_ALARM               0x10
  45 #define         ADT7470_R6T_ALARM               0x20
  46 #define         ADT7470_R7T_ALARM               0x40
  47 #define         ADT7470_OOL_ALARM               0x80
  48 #define ADT7470_REG_ALARM2                      0x42
  49 #define         ADT7470_R8T_ALARM               0x01
  50 #define         ADT7470_R9T_ALARM               0x02
  51 #define         ADT7470_R10T_ALARM              0x04
  52 #define         ADT7470_FAN1_ALARM              0x10
  53 #define         ADT7470_FAN2_ALARM              0x20
  54 #define         ADT7470_FAN3_ALARM              0x40
  55 #define         ADT7470_FAN4_ALARM              0x80
  56 #define ADT7470_REG_TEMP_LIMITS_BASE_ADDR       0x44
  57 #define ADT7470_REG_TEMP_LIMITS_MAX_ADDR        0x57
  58 #define ADT7470_REG_FAN_MIN_BASE_ADDR           0x58
  59 #define ADT7470_REG_FAN_MIN_MAX_ADDR            0x5F
  60 #define ADT7470_REG_FAN_MAX_BASE_ADDR           0x60
  61 #define ADT7470_REG_FAN_MAX_MAX_ADDR            0x67
  62 #define ADT7470_REG_PWM_CFG_BASE_ADDR           0x68
  63 #define ADT7470_REG_PWM12_CFG                   0x68
  64 #define         ADT7470_PWM2_AUTO_MASK          0x40
  65 #define         ADT7470_PWM1_AUTO_MASK          0x80
  66 #define         ADT7470_PWM_AUTO_MASK           0xC0
  67 #define ADT7470_REG_PWM34_CFG                   0x69
  68 #define         ADT7470_PWM3_AUTO_MASK          0x40
  69 #define         ADT7470_PWM4_AUTO_MASK          0x80
  70 #define ADT7470_REG_PWM_MIN_BASE_ADDR           0x6A
  71 #define ADT7470_REG_PWM_MIN_MAX_ADDR            0x6D
  72 #define ADT7470_REG_PWM_TEMP_MIN_BASE_ADDR      0x6E
  73 #define ADT7470_REG_PWM_TEMP_MIN_MAX_ADDR       0x71
  74 #define ADT7470_REG_CFG_2                       0x74
  75 #define ADT7470_REG_ACOUSTICS12                 0x75
  76 #define ADT7470_REG_ACOUSTICS34                 0x76
  77 #define ADT7470_REG_DEVICE                      0x3D
  78 #define ADT7470_REG_VENDOR                      0x3E
  79 #define ADT7470_REG_REVISION                    0x3F
  80 #define ADT7470_REG_ALARM1_MASK                 0x72
  81 #define ADT7470_REG_ALARM2_MASK                 0x73
  82 #define ADT7470_REG_PWM_AUTO_TEMP_BASE_ADDR     0x7C
  83 #define ADT7470_REG_PWM_AUTO_TEMP_MAX_ADDR      0x7D
  84 #define ADT7470_REG_MAX_ADDR                    0x81
  85 
  86 #define ADT7470_TEMP_COUNT      10
  87 #define ADT7470_TEMP_REG(x)     (ADT7470_REG_TEMP_BASE_ADDR + (x))
  88 #define ADT7470_TEMP_MIN_REG(x) (ADT7470_REG_TEMP_LIMITS_BASE_ADDR + ((x) * 2))
  89 #define ADT7470_TEMP_MAX_REG(x) (ADT7470_REG_TEMP_LIMITS_BASE_ADDR + \
  90                                 ((x) * 2) + 1)
  91 
  92 #define ADT7470_FAN_COUNT       4
  93 #define ADT7470_REG_FAN(x)      (ADT7470_REG_FAN_BASE_ADDR + ((x) * 2))
  94 #define ADT7470_REG_FAN_MIN(x)  (ADT7470_REG_FAN_MIN_BASE_ADDR + ((x) * 2))
  95 #define ADT7470_REG_FAN_MAX(x)  (ADT7470_REG_FAN_MAX_BASE_ADDR + ((x) * 2))
  96 
  97 #define ADT7470_PWM_COUNT       4
  98 #define ADT7470_REG_PWM(x)      (ADT7470_REG_PWM_BASE_ADDR + (x))
  99 #define ADT7470_REG_PWM_MAX(x)  (ADT7470_REG_PWM_MAX_BASE_ADDR + (x))
 100 #define ADT7470_REG_PWM_MIN(x)  (ADT7470_REG_PWM_MIN_BASE_ADDR + (x))
 101 #define ADT7470_REG_PWM_TMIN(x) (ADT7470_REG_PWM_TEMP_MIN_BASE_ADDR + (x))
 102 #define ADT7470_REG_PWM_CFG(x)  (ADT7470_REG_PWM_CFG_BASE_ADDR + ((x) / 2))
 103 #define ADT7470_REG_PWM_AUTO_TEMP(x)    (ADT7470_REG_PWM_AUTO_TEMP_BASE_ADDR + \
 104                                         ((x) / 2))
 105 
 106 #define ALARM2(x)               ((x) << 8)
 107 
 108 #define ADT7470_VENDOR          0x41
 109 #define ADT7470_DEVICE          0x70
 110 /* datasheet only mentions a revision 2 */
 111 #define ADT7470_REVISION        0x02
 112 
 113 /* "all temps" according to hwmon sysfs interface spec */
 114 #define ADT7470_PWM_ALL_TEMPS   0x3FF
 115 
 116 /* How often do we reread sensors values? (In jiffies) */
 117 #define SENSOR_REFRESH_INTERVAL (5 * HZ)
 118 
 119 /* How often do we reread sensor limit values? (In jiffies) */
 120 #define LIMIT_REFRESH_INTERVAL  (60 * HZ)
 121 
 122 /* Wait at least 200ms per sensor for 10 sensors */
 123 #define TEMP_COLLECTION_TIME    2000
 124 
 125 /* auto update thing won't fire more than every 2s */
 126 #define AUTO_UPDATE_INTERVAL    2000
 127 
 128 /* datasheet says to divide this number by the fan reading to get fan rpm */
 129 #define FAN_PERIOD_TO_RPM(x)    ((90000 * 60) / (x))
 130 #define FAN_RPM_TO_PERIOD       FAN_PERIOD_TO_RPM
 131 #define FAN_PERIOD_INVALID      65535
 132 #define FAN_DATA_VALID(x)       ((x) && (x) != FAN_PERIOD_INVALID)
 133 
 134 /* Config registers 1 and 2 include fields for selecting the PWM frequency */
 135 #define ADT7470_CFG_LF          0x40
 136 #define ADT7470_FREQ_MASK       0x70
 137 #define ADT7470_FREQ_SHIFT      4
 138 
 139 struct adt7470_data {
 140         struct i2c_client       *client;
 141         struct mutex            lock;
 142         char                    sensors_valid;
 143         char                    limits_valid;
 144         unsigned long           sensors_last_updated;   /* In jiffies */
 145         unsigned long           limits_last_updated;    /* In jiffies */
 146 
 147         int                     num_temp_sensors;       /* -1 = probe */
 148         int                     temperatures_probed;
 149 
 150         s8                      temp[ADT7470_TEMP_COUNT];
 151         s8                      temp_min[ADT7470_TEMP_COUNT];
 152         s8                      temp_max[ADT7470_TEMP_COUNT];
 153         u16                     fan[ADT7470_FAN_COUNT];
 154         u16                     fan_min[ADT7470_FAN_COUNT];
 155         u16                     fan_max[ADT7470_FAN_COUNT];
 156         u16                     alarm;
 157         u16                     alarms_mask;
 158         u8                      force_pwm_max;
 159         u8                      pwm[ADT7470_PWM_COUNT];
 160         u8                      pwm_max[ADT7470_PWM_COUNT];
 161         u8                      pwm_automatic[ADT7470_PWM_COUNT];
 162         u8                      pwm_min[ADT7470_PWM_COUNT];
 163         s8                      pwm_tmin[ADT7470_PWM_COUNT];
 164         u8                      pwm_auto_temp[ADT7470_PWM_COUNT];
 165 
 166         struct task_struct      *auto_update;
 167         unsigned int            auto_update_interval;
 168 };
 169 
 170 /*
 171  * 16-bit registers on the ADT7470 are low-byte first.  The data sheet says
 172  * that the low byte must be read before the high byte.
 173  */
 174 static inline int adt7470_read_word_data(struct i2c_client *client, u8 reg)
 175 {
 176         u16 foo;
 177         foo = i2c_smbus_read_byte_data(client, reg);
 178         foo |= ((u16)i2c_smbus_read_byte_data(client, reg + 1) << 8);
 179         return foo;
 180 }
 181 
 182 static inline int adt7470_write_word_data(struct i2c_client *client, u8 reg,
 183                                           u16 value)
 184 {
 185         return i2c_smbus_write_byte_data(client, reg, value & 0xFF)
 186                || i2c_smbus_write_byte_data(client, reg + 1, value >> 8);
 187 }
 188 
 189 /* Probe for temperature sensors.  Assumes lock is held */
 190 static int adt7470_read_temperatures(struct i2c_client *client,
 191                                      struct adt7470_data *data)
 192 {
 193         unsigned long res;
 194         int i;
 195         u8 cfg, pwm[4], pwm_cfg[2];
 196 
 197         /* save pwm[1-4] config register */
 198         pwm_cfg[0] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM_CFG(0));
 199         pwm_cfg[1] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM_CFG(2));
 200 
 201         /* set manual pwm to whatever it is set to now */
 202         for (i = 0; i < ADT7470_FAN_COUNT; i++)
 203                 pwm[i] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM(i));
 204 
 205         /* put pwm in manual mode */
 206         i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(0),
 207                 pwm_cfg[0] & ~(ADT7470_PWM_AUTO_MASK));
 208         i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(2),
 209                 pwm_cfg[1] & ~(ADT7470_PWM_AUTO_MASK));
 210 
 211         /* write pwm control to whatever it was */
 212         for (i = 0; i < ADT7470_FAN_COUNT; i++)
 213                 i2c_smbus_write_byte_data(client, ADT7470_REG_PWM(i), pwm[i]);
 214 
 215         /* start reading temperature sensors */
 216         cfg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
 217         cfg |= 0x80;
 218         i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, cfg);
 219 
 220         /* Delay is 200ms * number of temp sensors. */
 221         res = msleep_interruptible((data->num_temp_sensors >= 0 ?
 222                                     data->num_temp_sensors * 200 :
 223                                     TEMP_COLLECTION_TIME));
 224 
 225         /* done reading temperature sensors */
 226         cfg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
 227         cfg &= ~0x80;
 228         i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, cfg);
 229 
 230         /* restore pwm[1-4] config registers */
 231         i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(0), pwm_cfg[0]);
 232         i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(2), pwm_cfg[1]);
 233 
 234         if (res) {
 235                 pr_err("ha ha, interrupted\n");
 236                 return -EAGAIN;
 237         }
 238 
 239         /* Only count fans if we have to */
 240         if (data->num_temp_sensors >= 0)
 241                 return 0;
 242 
 243         for (i = 0; i < ADT7470_TEMP_COUNT; i++) {
 244                 data->temp[i] = i2c_smbus_read_byte_data(client,
 245                                                 ADT7470_TEMP_REG(i));
 246                 if (data->temp[i])
 247                         data->num_temp_sensors = i + 1;
 248         }
 249         data->temperatures_probed = 1;
 250         return 0;
 251 }
 252 
 253 static int adt7470_update_thread(void *p)
 254 {
 255         struct i2c_client *client = p;
 256         struct adt7470_data *data = i2c_get_clientdata(client);
 257 
 258         while (!kthread_should_stop()) {
 259                 mutex_lock(&data->lock);
 260                 adt7470_read_temperatures(client, data);
 261                 mutex_unlock(&data->lock);
 262 
 263                 set_current_state(TASK_INTERRUPTIBLE);
 264                 if (kthread_should_stop())
 265                         break;
 266 
 267                 schedule_timeout(msecs_to_jiffies(data->auto_update_interval));
 268         }
 269 
 270         return 0;
 271 }
 272 
 273 static struct adt7470_data *adt7470_update_device(struct device *dev)
 274 {
 275         struct adt7470_data *data = dev_get_drvdata(dev);
 276         struct i2c_client *client = data->client;
 277         unsigned long local_jiffies = jiffies;
 278         u8 cfg;
 279         int i;
 280         int need_sensors = 1;
 281         int need_limits = 1;
 282 
 283         /*
 284          * Figure out if we need to update the shadow registers.
 285          * Lockless means that we may occasionally report out of
 286          * date data.
 287          */
 288         if (time_before(local_jiffies, data->sensors_last_updated +
 289                         SENSOR_REFRESH_INTERVAL) &&
 290             data->sensors_valid)
 291                 need_sensors = 0;
 292 
 293         if (time_before(local_jiffies, data->limits_last_updated +
 294                         LIMIT_REFRESH_INTERVAL) &&
 295             data->limits_valid)
 296                 need_limits = 0;
 297 
 298         if (!need_sensors && !need_limits)
 299                 return data;
 300 
 301         mutex_lock(&data->lock);
 302         if (!need_sensors)
 303                 goto no_sensor_update;
 304 
 305         if (!data->temperatures_probed)
 306                 adt7470_read_temperatures(client, data);
 307         else
 308                 for (i = 0; i < ADT7470_TEMP_COUNT; i++)
 309                         data->temp[i] = i2c_smbus_read_byte_data(client,
 310                                                 ADT7470_TEMP_REG(i));
 311 
 312         for (i = 0; i < ADT7470_FAN_COUNT; i++)
 313                 data->fan[i] = adt7470_read_word_data(client,
 314                                                 ADT7470_REG_FAN(i));
 315 
 316         for (i = 0; i < ADT7470_PWM_COUNT; i++) {
 317                 int reg;
 318                 int reg_mask;
 319 
 320                 data->pwm[i] = i2c_smbus_read_byte_data(client,
 321                                                 ADT7470_REG_PWM(i));
 322 
 323                 if (i % 2)
 324                         reg_mask = ADT7470_PWM2_AUTO_MASK;
 325                 else
 326                         reg_mask = ADT7470_PWM1_AUTO_MASK;
 327 
 328                 reg = ADT7470_REG_PWM_CFG(i);
 329                 if (i2c_smbus_read_byte_data(client, reg) & reg_mask)
 330                         data->pwm_automatic[i] = 1;
 331                 else
 332                         data->pwm_automatic[i] = 0;
 333 
 334                 reg = ADT7470_REG_PWM_AUTO_TEMP(i);
 335                 cfg = i2c_smbus_read_byte_data(client, reg);
 336                 if (!(i % 2))
 337                         data->pwm_auto_temp[i] = cfg >> 4;
 338                 else
 339                         data->pwm_auto_temp[i] = cfg & 0xF;
 340         }
 341 
 342         if (i2c_smbus_read_byte_data(client, ADT7470_REG_CFG) &
 343             ADT7470_FSPD_MASK)
 344                 data->force_pwm_max = 1;
 345         else
 346                 data->force_pwm_max = 0;
 347 
 348         data->alarm = i2c_smbus_read_byte_data(client, ADT7470_REG_ALARM1);
 349         if (data->alarm & ADT7470_OOL_ALARM)
 350                 data->alarm |= ALARM2(i2c_smbus_read_byte_data(client,
 351                                                         ADT7470_REG_ALARM2));
 352         data->alarms_mask = adt7470_read_word_data(client,
 353                                                    ADT7470_REG_ALARM1_MASK);
 354 
 355         data->sensors_last_updated = local_jiffies;
 356         data->sensors_valid = 1;
 357 
 358 no_sensor_update:
 359         if (!need_limits)
 360                 goto out;
 361 
 362         for (i = 0; i < ADT7470_TEMP_COUNT; i++) {
 363                 data->temp_min[i] = i2c_smbus_read_byte_data(client,
 364                                                 ADT7470_TEMP_MIN_REG(i));
 365                 data->temp_max[i] = i2c_smbus_read_byte_data(client,
 366                                                 ADT7470_TEMP_MAX_REG(i));
 367         }
 368 
 369         for (i = 0; i < ADT7470_FAN_COUNT; i++) {
 370                 data->fan_min[i] = adt7470_read_word_data(client,
 371                                                 ADT7470_REG_FAN_MIN(i));
 372                 data->fan_max[i] = adt7470_read_word_data(client,
 373                                                 ADT7470_REG_FAN_MAX(i));
 374         }
 375 
 376         for (i = 0; i < ADT7470_PWM_COUNT; i++) {
 377                 data->pwm_max[i] = i2c_smbus_read_byte_data(client,
 378                                                 ADT7470_REG_PWM_MAX(i));
 379                 data->pwm_min[i] = i2c_smbus_read_byte_data(client,
 380                                                 ADT7470_REG_PWM_MIN(i));
 381                 data->pwm_tmin[i] = i2c_smbus_read_byte_data(client,
 382                                                 ADT7470_REG_PWM_TMIN(i));
 383         }
 384 
 385         data->limits_last_updated = local_jiffies;
 386         data->limits_valid = 1;
 387 
 388 out:
 389         mutex_unlock(&data->lock);
 390         return data;
 391 }
 392 
 393 static ssize_t auto_update_interval_show(struct device *dev,
 394                                          struct device_attribute *devattr,
 395                                          char *buf)
 396 {
 397         struct adt7470_data *data = adt7470_update_device(dev);
 398         return sprintf(buf, "%d\n", data->auto_update_interval);
 399 }
 400 
 401 static ssize_t auto_update_interval_store(struct device *dev,
 402                                           struct device_attribute *devattr,
 403                                           const char *buf, size_t count)
 404 {
 405         struct adt7470_data *data = dev_get_drvdata(dev);
 406         long temp;
 407 
 408         if (kstrtol(buf, 10, &temp))
 409                 return -EINVAL;
 410 
 411         temp = clamp_val(temp, 0, 60000);
 412 
 413         mutex_lock(&data->lock);
 414         data->auto_update_interval = temp;
 415         mutex_unlock(&data->lock);
 416 
 417         return count;
 418 }
 419 
 420 static ssize_t num_temp_sensors_show(struct device *dev,
 421                                      struct device_attribute *devattr,
 422                                      char *buf)
 423 {
 424         struct adt7470_data *data = adt7470_update_device(dev);
 425         return sprintf(buf, "%d\n", data->num_temp_sensors);
 426 }
 427 
 428 static ssize_t num_temp_sensors_store(struct device *dev,
 429                                       struct device_attribute *devattr,
 430                                       const char *buf, size_t count)
 431 {
 432         struct adt7470_data *data = dev_get_drvdata(dev);
 433         long temp;
 434 
 435         if (kstrtol(buf, 10, &temp))
 436                 return -EINVAL;
 437 
 438         temp = clamp_val(temp, -1, 10);
 439 
 440         mutex_lock(&data->lock);
 441         data->num_temp_sensors = temp;
 442         if (temp < 0)
 443                 data->temperatures_probed = 0;
 444         mutex_unlock(&data->lock);
 445 
 446         return count;
 447 }
 448 
 449 static ssize_t temp_min_show(struct device *dev,
 450                              struct device_attribute *devattr, char *buf)
 451 {
 452         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 453         struct adt7470_data *data = adt7470_update_device(dev);
 454         return sprintf(buf, "%d\n", 1000 * data->temp_min[attr->index]);
 455 }
 456 
 457 static ssize_t temp_min_store(struct device *dev,
 458                               struct device_attribute *devattr,
 459                               const char *buf, size_t count)
 460 {
 461         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 462         struct adt7470_data *data = dev_get_drvdata(dev);
 463         struct i2c_client *client = data->client;
 464         long temp;
 465 
 466         if (kstrtol(buf, 10, &temp))
 467                 return -EINVAL;
 468 
 469         temp = clamp_val(temp, -128000, 127000);
 470         temp = DIV_ROUND_CLOSEST(temp, 1000);
 471 
 472         mutex_lock(&data->lock);
 473         data->temp_min[attr->index] = temp;
 474         i2c_smbus_write_byte_data(client, ADT7470_TEMP_MIN_REG(attr->index),
 475                                   temp);
 476         mutex_unlock(&data->lock);
 477 
 478         return count;
 479 }
 480 
 481 static ssize_t temp_max_show(struct device *dev,
 482                              struct device_attribute *devattr, char *buf)
 483 {
 484         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 485         struct adt7470_data *data = adt7470_update_device(dev);
 486         return sprintf(buf, "%d\n", 1000 * data->temp_max[attr->index]);
 487 }
 488 
 489 static ssize_t temp_max_store(struct device *dev,
 490                               struct device_attribute *devattr,
 491                               const char *buf, size_t count)
 492 {
 493         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 494         struct adt7470_data *data = dev_get_drvdata(dev);
 495         struct i2c_client *client = data->client;
 496         long temp;
 497 
 498         if (kstrtol(buf, 10, &temp))
 499                 return -EINVAL;
 500 
 501         temp = clamp_val(temp, -128000, 127000);
 502         temp = DIV_ROUND_CLOSEST(temp, 1000);
 503 
 504         mutex_lock(&data->lock);
 505         data->temp_max[attr->index] = temp;
 506         i2c_smbus_write_byte_data(client, ADT7470_TEMP_MAX_REG(attr->index),
 507                                   temp);
 508         mutex_unlock(&data->lock);
 509 
 510         return count;
 511 }
 512 
 513 static ssize_t temp_show(struct device *dev, struct device_attribute *devattr,
 514                          char *buf)
 515 {
 516         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 517         struct adt7470_data *data = adt7470_update_device(dev);
 518         return sprintf(buf, "%d\n", 1000 * data->temp[attr->index]);
 519 }
 520 
 521 static ssize_t alarm_mask_show(struct device *dev,
 522                            struct device_attribute *devattr,
 523                            char *buf)
 524 {
 525         struct adt7470_data *data = adt7470_update_device(dev);
 526 
 527         return sprintf(buf, "%x\n", data->alarms_mask);
 528 }
 529 
 530 static ssize_t alarm_mask_store(struct device *dev,
 531                                 struct device_attribute *devattr,
 532                                 const char *buf, size_t count)
 533 {
 534         struct adt7470_data *data = dev_get_drvdata(dev);
 535         long mask;
 536 
 537         if (kstrtoul(buf, 0, &mask))
 538                 return -EINVAL;
 539 
 540         if (mask & ~0xffff)
 541                 return -EINVAL;
 542 
 543         mutex_lock(&data->lock);
 544         data->alarms_mask = mask;
 545         adt7470_write_word_data(data->client, ADT7470_REG_ALARM1_MASK, mask);
 546         mutex_unlock(&data->lock);
 547 
 548         return count;
 549 }
 550 
 551 static ssize_t fan_max_show(struct device *dev,
 552                             struct device_attribute *devattr, char *buf)
 553 {
 554         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 555         struct adt7470_data *data = adt7470_update_device(dev);
 556 
 557         if (FAN_DATA_VALID(data->fan_max[attr->index]))
 558                 return sprintf(buf, "%d\n",
 559                                FAN_PERIOD_TO_RPM(data->fan_max[attr->index]));
 560         else
 561                 return sprintf(buf, "0\n");
 562 }
 563 
 564 static ssize_t fan_max_store(struct device *dev,
 565                              struct device_attribute *devattr,
 566                              const char *buf, size_t count)
 567 {
 568         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 569         struct adt7470_data *data = dev_get_drvdata(dev);
 570         struct i2c_client *client = data->client;
 571         long temp;
 572 
 573         if (kstrtol(buf, 10, &temp) || !temp)
 574                 return -EINVAL;
 575 
 576         temp = FAN_RPM_TO_PERIOD(temp);
 577         temp = clamp_val(temp, 1, 65534);
 578 
 579         mutex_lock(&data->lock);
 580         data->fan_max[attr->index] = temp;
 581         adt7470_write_word_data(client, ADT7470_REG_FAN_MAX(attr->index), temp);
 582         mutex_unlock(&data->lock);
 583 
 584         return count;
 585 }
 586 
 587 static ssize_t fan_min_show(struct device *dev,
 588                             struct device_attribute *devattr, char *buf)
 589 {
 590         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 591         struct adt7470_data *data = adt7470_update_device(dev);
 592 
 593         if (FAN_DATA_VALID(data->fan_min[attr->index]))
 594                 return sprintf(buf, "%d\n",
 595                                FAN_PERIOD_TO_RPM(data->fan_min[attr->index]));
 596         else
 597                 return sprintf(buf, "0\n");
 598 }
 599 
 600 static ssize_t fan_min_store(struct device *dev,
 601                              struct device_attribute *devattr,
 602                              const char *buf, size_t count)
 603 {
 604         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 605         struct adt7470_data *data = dev_get_drvdata(dev);
 606         struct i2c_client *client = data->client;
 607         long temp;
 608 
 609         if (kstrtol(buf, 10, &temp) || !temp)
 610                 return -EINVAL;
 611 
 612         temp = FAN_RPM_TO_PERIOD(temp);
 613         temp = clamp_val(temp, 1, 65534);
 614 
 615         mutex_lock(&data->lock);
 616         data->fan_min[attr->index] = temp;
 617         adt7470_write_word_data(client, ADT7470_REG_FAN_MIN(attr->index), temp);
 618         mutex_unlock(&data->lock);
 619 
 620         return count;
 621 }
 622 
 623 static ssize_t fan_show(struct device *dev, struct device_attribute *devattr,
 624                         char *buf)
 625 {
 626         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 627         struct adt7470_data *data = adt7470_update_device(dev);
 628 
 629         if (FAN_DATA_VALID(data->fan[attr->index]))
 630                 return sprintf(buf, "%d\n",
 631                                FAN_PERIOD_TO_RPM(data->fan[attr->index]));
 632         else
 633                 return sprintf(buf, "0\n");
 634 }
 635 
 636 static ssize_t force_pwm_max_show(struct device *dev,
 637                                   struct device_attribute *devattr, char *buf)
 638 {
 639         struct adt7470_data *data = adt7470_update_device(dev);
 640         return sprintf(buf, "%d\n", data->force_pwm_max);
 641 }
 642 
 643 static ssize_t force_pwm_max_store(struct device *dev,
 644                                    struct device_attribute *devattr,
 645                                    const char *buf, size_t count)
 646 {
 647         struct adt7470_data *data = dev_get_drvdata(dev);
 648         struct i2c_client *client = data->client;
 649         long temp;
 650         u8 reg;
 651 
 652         if (kstrtol(buf, 10, &temp))
 653                 return -EINVAL;
 654 
 655         mutex_lock(&data->lock);
 656         data->force_pwm_max = temp;
 657         reg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
 658         if (temp)
 659                 reg |= ADT7470_FSPD_MASK;
 660         else
 661                 reg &= ~ADT7470_FSPD_MASK;
 662         i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, reg);
 663         mutex_unlock(&data->lock);
 664 
 665         return count;
 666 }
 667 
 668 static ssize_t pwm_show(struct device *dev, struct device_attribute *devattr,
 669                         char *buf)
 670 {
 671         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 672         struct adt7470_data *data = adt7470_update_device(dev);
 673         return sprintf(buf, "%d\n", data->pwm[attr->index]);
 674 }
 675 
 676 static ssize_t pwm_store(struct device *dev, struct device_attribute *devattr,
 677                          const char *buf, size_t count)
 678 {
 679         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 680         struct adt7470_data *data = dev_get_drvdata(dev);
 681         struct i2c_client *client = data->client;
 682         long temp;
 683 
 684         if (kstrtol(buf, 10, &temp))
 685                 return -EINVAL;
 686 
 687         temp = clamp_val(temp, 0, 255);
 688 
 689         mutex_lock(&data->lock);
 690         data->pwm[attr->index] = temp;
 691         i2c_smbus_write_byte_data(client, ADT7470_REG_PWM(attr->index), temp);
 692         mutex_unlock(&data->lock);
 693 
 694         return count;
 695 }
 696 
 697 /* These are the valid PWM frequencies to the nearest Hz */
 698 static const int adt7470_freq_map[] = {
 699         11, 15, 22, 29, 35, 44, 59, 88, 1400, 22500
 700 };
 701 
 702 static ssize_t pwm1_freq_show(struct device *dev,
 703                               struct device_attribute *devattr, char *buf)
 704 {
 705         struct adt7470_data *data = adt7470_update_device(dev);
 706         unsigned char cfg_reg_1;
 707         unsigned char cfg_reg_2;
 708         int index;
 709 
 710         mutex_lock(&data->lock);
 711         cfg_reg_1 = i2c_smbus_read_byte_data(data->client, ADT7470_REG_CFG);
 712         cfg_reg_2 = i2c_smbus_read_byte_data(data->client, ADT7470_REG_CFG_2);
 713         mutex_unlock(&data->lock);
 714 
 715         index = (cfg_reg_2 & ADT7470_FREQ_MASK) >> ADT7470_FREQ_SHIFT;
 716         if (!(cfg_reg_1 & ADT7470_CFG_LF))
 717                 index += 8;
 718         if (index >= ARRAY_SIZE(adt7470_freq_map))
 719                 index = ARRAY_SIZE(adt7470_freq_map) - 1;
 720 
 721         return scnprintf(buf, PAGE_SIZE, "%d\n", adt7470_freq_map[index]);
 722 }
 723 
 724 static ssize_t pwm1_freq_store(struct device *dev,
 725                                struct device_attribute *devattr,
 726                                const char *buf, size_t count)
 727 {
 728         struct adt7470_data *data = dev_get_drvdata(dev);
 729         struct i2c_client *client = data->client;
 730         long freq;
 731         int index;
 732         int low_freq = ADT7470_CFG_LF;
 733         unsigned char val;
 734 
 735         if (kstrtol(buf, 10, &freq))
 736                 return -EINVAL;
 737 
 738         /* Round the user value given to the closest available frequency */
 739         index = find_closest(freq, adt7470_freq_map,
 740                              ARRAY_SIZE(adt7470_freq_map));
 741 
 742         if (index >= 8) {
 743                 index -= 8;
 744                 low_freq = 0;
 745         }
 746 
 747         mutex_lock(&data->lock);
 748         /* Configuration Register 1 */
 749         val = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
 750         i2c_smbus_write_byte_data(client, ADT7470_REG_CFG,
 751                                   (val & ~ADT7470_CFG_LF) | low_freq);
 752         /* Configuration Register 2 */
 753         val = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG_2);
 754         i2c_smbus_write_byte_data(client, ADT7470_REG_CFG_2,
 755                 (val & ~ADT7470_FREQ_MASK) | (index << ADT7470_FREQ_SHIFT));
 756         mutex_unlock(&data->lock);
 757 
 758         return count;
 759 }
 760 
 761 static ssize_t pwm_max_show(struct device *dev,
 762                             struct device_attribute *devattr, char *buf)
 763 {
 764         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 765         struct adt7470_data *data = adt7470_update_device(dev);
 766         return sprintf(buf, "%d\n", data->pwm_max[attr->index]);
 767 }
 768 
 769 static ssize_t pwm_max_store(struct device *dev,
 770                              struct device_attribute *devattr,
 771                              const char *buf, size_t count)
 772 {
 773         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 774         struct adt7470_data *data = dev_get_drvdata(dev);
 775         struct i2c_client *client = data->client;
 776         long temp;
 777 
 778         if (kstrtol(buf, 10, &temp))
 779                 return -EINVAL;
 780 
 781         temp = clamp_val(temp, 0, 255);
 782 
 783         mutex_lock(&data->lock);
 784         data->pwm_max[attr->index] = temp;
 785         i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_MAX(attr->index),
 786                                   temp);
 787         mutex_unlock(&data->lock);
 788 
 789         return count;
 790 }
 791 
 792 static ssize_t pwm_min_show(struct device *dev,
 793                             struct device_attribute *devattr, char *buf)
 794 {
 795         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 796         struct adt7470_data *data = adt7470_update_device(dev);
 797         return sprintf(buf, "%d\n", data->pwm_min[attr->index]);
 798 }
 799 
 800 static ssize_t pwm_min_store(struct device *dev,
 801                              struct device_attribute *devattr,
 802                              const char *buf, size_t count)
 803 {
 804         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 805         struct adt7470_data *data = dev_get_drvdata(dev);
 806         struct i2c_client *client = data->client;
 807         long temp;
 808 
 809         if (kstrtol(buf, 10, &temp))
 810                 return -EINVAL;
 811 
 812         temp = clamp_val(temp, 0, 255);
 813 
 814         mutex_lock(&data->lock);
 815         data->pwm_min[attr->index] = temp;
 816         i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_MIN(attr->index),
 817                                   temp);
 818         mutex_unlock(&data->lock);
 819 
 820         return count;
 821 }
 822 
 823 static ssize_t pwm_tmax_show(struct device *dev,
 824                              struct device_attribute *devattr, char *buf)
 825 {
 826         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 827         struct adt7470_data *data = adt7470_update_device(dev);
 828         /* the datasheet says that tmax = tmin + 20C */
 829         return sprintf(buf, "%d\n", 1000 * (20 + data->pwm_tmin[attr->index]));
 830 }
 831 
 832 static ssize_t pwm_tmin_show(struct device *dev,
 833                              struct device_attribute *devattr, char *buf)
 834 {
 835         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 836         struct adt7470_data *data = adt7470_update_device(dev);
 837         return sprintf(buf, "%d\n", 1000 * data->pwm_tmin[attr->index]);
 838 }
 839 
 840 static ssize_t pwm_tmin_store(struct device *dev,
 841                               struct device_attribute *devattr,
 842                               const char *buf, size_t count)
 843 {
 844         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 845         struct adt7470_data *data = dev_get_drvdata(dev);
 846         struct i2c_client *client = data->client;
 847         long temp;
 848 
 849         if (kstrtol(buf, 10, &temp))
 850                 return -EINVAL;
 851 
 852         temp = clamp_val(temp, -128000, 127000);
 853         temp = DIV_ROUND_CLOSEST(temp, 1000);
 854 
 855         mutex_lock(&data->lock);
 856         data->pwm_tmin[attr->index] = temp;
 857         i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_TMIN(attr->index),
 858                                   temp);
 859         mutex_unlock(&data->lock);
 860 
 861         return count;
 862 }
 863 
 864 static ssize_t pwm_auto_show(struct device *dev,
 865                              struct device_attribute *devattr, char *buf)
 866 {
 867         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 868         struct adt7470_data *data = adt7470_update_device(dev);
 869         return sprintf(buf, "%d\n", 1 + data->pwm_automatic[attr->index]);
 870 }
 871 
 872 static ssize_t pwm_auto_store(struct device *dev,
 873                               struct device_attribute *devattr,
 874                               const char *buf, size_t count)
 875 {
 876         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 877         struct adt7470_data *data = dev_get_drvdata(dev);
 878         struct i2c_client *client = data->client;
 879         int pwm_auto_reg = ADT7470_REG_PWM_CFG(attr->index);
 880         int pwm_auto_reg_mask;
 881         long temp;
 882         u8 reg;
 883 
 884         if (kstrtol(buf, 10, &temp))
 885                 return -EINVAL;
 886 
 887         if (attr->index % 2)
 888                 pwm_auto_reg_mask = ADT7470_PWM2_AUTO_MASK;
 889         else
 890                 pwm_auto_reg_mask = ADT7470_PWM1_AUTO_MASK;
 891 
 892         if (temp != 2 && temp != 1)
 893                 return -EINVAL;
 894         temp--;
 895 
 896         mutex_lock(&data->lock);
 897         data->pwm_automatic[attr->index] = temp;
 898         reg = i2c_smbus_read_byte_data(client, pwm_auto_reg);
 899         if (temp)
 900                 reg |= pwm_auto_reg_mask;
 901         else
 902                 reg &= ~pwm_auto_reg_mask;
 903         i2c_smbus_write_byte_data(client, pwm_auto_reg, reg);
 904         mutex_unlock(&data->lock);
 905 
 906         return count;
 907 }
 908 
 909 static ssize_t pwm_auto_temp_show(struct device *dev,
 910                                   struct device_attribute *devattr, char *buf)
 911 {
 912         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 913         struct adt7470_data *data = adt7470_update_device(dev);
 914         u8 ctrl = data->pwm_auto_temp[attr->index];
 915 
 916         if (ctrl)
 917                 return sprintf(buf, "%d\n", 1 << (ctrl - 1));
 918         else
 919                 return sprintf(buf, "%d\n", ADT7470_PWM_ALL_TEMPS);
 920 }
 921 
 922 static int cvt_auto_temp(int input)
 923 {
 924         if (input == ADT7470_PWM_ALL_TEMPS)
 925                 return 0;
 926         if (input < 1 || !is_power_of_2(input))
 927                 return -EINVAL;
 928         return ilog2(input) + 1;
 929 }
 930 
 931 static ssize_t pwm_auto_temp_store(struct device *dev,
 932                                    struct device_attribute *devattr,
 933                                    const char *buf, size_t count)
 934 {
 935         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 936         struct adt7470_data *data = dev_get_drvdata(dev);
 937         struct i2c_client *client = data->client;
 938         int pwm_auto_reg = ADT7470_REG_PWM_AUTO_TEMP(attr->index);
 939         long temp;
 940         u8 reg;
 941 
 942         if (kstrtol(buf, 10, &temp))
 943                 return -EINVAL;
 944 
 945         temp = cvt_auto_temp(temp);
 946         if (temp < 0)
 947                 return temp;
 948 
 949         mutex_lock(&data->lock);
 950         data->pwm_automatic[attr->index] = temp;
 951         reg = i2c_smbus_read_byte_data(client, pwm_auto_reg);
 952 
 953         if (!(attr->index % 2)) {
 954                 reg &= 0xF;
 955                 reg |= (temp << 4) & 0xF0;
 956         } else {
 957                 reg &= 0xF0;
 958                 reg |= temp & 0xF;
 959         }
 960 
 961         i2c_smbus_write_byte_data(client, pwm_auto_reg, reg);
 962         mutex_unlock(&data->lock);
 963 
 964         return count;
 965 }
 966 
 967 static ssize_t alarm_show(struct device *dev,
 968                           struct device_attribute *devattr, char *buf)
 969 {
 970         struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 971         struct adt7470_data *data = adt7470_update_device(dev);
 972 
 973         if (data->alarm & attr->index)
 974                 return sprintf(buf, "1\n");
 975         else
 976                 return sprintf(buf, "0\n");
 977 }
 978 
 979 static DEVICE_ATTR_RW(alarm_mask);
 980 static DEVICE_ATTR_RW(num_temp_sensors);
 981 static DEVICE_ATTR_RW(auto_update_interval);
 982 
 983 static SENSOR_DEVICE_ATTR_RW(temp1_max, temp_max, 0);
 984 static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1);
 985 static SENSOR_DEVICE_ATTR_RW(temp3_max, temp_max, 2);
 986 static SENSOR_DEVICE_ATTR_RW(temp4_max, temp_max, 3);
 987 static SENSOR_DEVICE_ATTR_RW(temp5_max, temp_max, 4);
 988 static SENSOR_DEVICE_ATTR_RW(temp6_max, temp_max, 5);
 989 static SENSOR_DEVICE_ATTR_RW(temp7_max, temp_max, 6);
 990 static SENSOR_DEVICE_ATTR_RW(temp8_max, temp_max, 7);
 991 static SENSOR_DEVICE_ATTR_RW(temp9_max, temp_max, 8);
 992 static SENSOR_DEVICE_ATTR_RW(temp10_max, temp_max, 9);
 993 
 994 static SENSOR_DEVICE_ATTR_RW(temp1_min, temp_min, 0);
 995 static SENSOR_DEVICE_ATTR_RW(temp2_min, temp_min, 1);
 996 static SENSOR_DEVICE_ATTR_RW(temp3_min, temp_min, 2);
 997 static SENSOR_DEVICE_ATTR_RW(temp4_min, temp_min, 3);
 998 static SENSOR_DEVICE_ATTR_RW(temp5_min, temp_min, 4);
 999 static SENSOR_DEVICE_ATTR_RW(temp6_min, temp_min, 5);
1000 static SENSOR_DEVICE_ATTR_RW(temp7_min, temp_min, 6);
1001 static SENSOR_DEVICE_ATTR_RW(temp8_min, temp_min, 7);
1002 static SENSOR_DEVICE_ATTR_RW(temp9_min, temp_min, 8);
1003 static SENSOR_DEVICE_ATTR_RW(temp10_min, temp_min, 9);
1004 
1005 static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0);
1006 static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1);
1007 static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2);
1008 static SENSOR_DEVICE_ATTR_RO(temp4_input, temp, 3);
1009 static SENSOR_DEVICE_ATTR_RO(temp5_input, temp, 4);
1010 static SENSOR_DEVICE_ATTR_RO(temp6_input, temp, 5);
1011 static SENSOR_DEVICE_ATTR_RO(temp7_input, temp, 6);
1012 static SENSOR_DEVICE_ATTR_RO(temp8_input, temp, 7);
1013 static SENSOR_DEVICE_ATTR_RO(temp9_input, temp, 8);
1014 static SENSOR_DEVICE_ATTR_RO(temp10_input, temp, 9);
1015 
1016 static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, ADT7470_R1T_ALARM);
1017 static SENSOR_DEVICE_ATTR_RO(temp2_alarm, alarm, ADT7470_R2T_ALARM);
1018 static SENSOR_DEVICE_ATTR_RO(temp3_alarm, alarm, ADT7470_R3T_ALARM);
1019 static SENSOR_DEVICE_ATTR_RO(temp4_alarm, alarm, ADT7470_R4T_ALARM);
1020 static SENSOR_DEVICE_ATTR_RO(temp5_alarm, alarm, ADT7470_R5T_ALARM);
1021 static SENSOR_DEVICE_ATTR_RO(temp6_alarm, alarm, ADT7470_R6T_ALARM);
1022 static SENSOR_DEVICE_ATTR_RO(temp7_alarm, alarm, ADT7470_R7T_ALARM);
1023 static SENSOR_DEVICE_ATTR_RO(temp8_alarm, alarm, ALARM2(ADT7470_R8T_ALARM));
1024 static SENSOR_DEVICE_ATTR_RO(temp9_alarm, alarm, ALARM2(ADT7470_R9T_ALARM));
1025 static SENSOR_DEVICE_ATTR_RO(temp10_alarm, alarm, ALARM2(ADT7470_R10T_ALARM));
1026 
1027 static SENSOR_DEVICE_ATTR_RW(fan1_max, fan_max, 0);
1028 static SENSOR_DEVICE_ATTR_RW(fan2_max, fan_max, 1);
1029 static SENSOR_DEVICE_ATTR_RW(fan3_max, fan_max, 2);
1030 static SENSOR_DEVICE_ATTR_RW(fan4_max, fan_max, 3);
1031 
1032 static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0);
1033 static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1);
1034 static SENSOR_DEVICE_ATTR_RW(fan3_min, fan_min, 2);
1035 static SENSOR_DEVICE_ATTR_RW(fan4_min, fan_min, 3);
1036 
1037 static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0);
1038 static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1);
1039 static SENSOR_DEVICE_ATTR_RO(fan3_input, fan, 2);
1040 static SENSOR_DEVICE_ATTR_RO(fan4_input, fan, 3);
1041 
1042 static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, ALARM2(ADT7470_FAN1_ALARM));
1043 static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, ALARM2(ADT7470_FAN2_ALARM));
1044 static SENSOR_DEVICE_ATTR_RO(fan3_alarm, alarm, ALARM2(ADT7470_FAN3_ALARM));
1045 static SENSOR_DEVICE_ATTR_RO(fan4_alarm, alarm, ALARM2(ADT7470_FAN4_ALARM));
1046 
1047 static SENSOR_DEVICE_ATTR_RW(force_pwm_max, force_pwm_max, 0);
1048 
1049 static SENSOR_DEVICE_ATTR_RW(pwm1, pwm, 0);
1050 static SENSOR_DEVICE_ATTR_RW(pwm2, pwm, 1);
1051 static SENSOR_DEVICE_ATTR_RW(pwm3, pwm, 2);
1052 static SENSOR_DEVICE_ATTR_RW(pwm4, pwm, 3);
1053 
1054 static DEVICE_ATTR_RW(pwm1_freq);
1055 
1056 static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point1_pwm, pwm_min, 0);
1057 static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point1_pwm, pwm_min, 1);
1058 static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point1_pwm, pwm_min, 2);
1059 static SENSOR_DEVICE_ATTR_RW(pwm4_auto_point1_pwm, pwm_min, 3);
1060 
1061 static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point2_pwm, pwm_max, 0);
1062 static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point2_pwm, pwm_max, 1);
1063 static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point2_pwm, pwm_max, 2);
1064 static SENSOR_DEVICE_ATTR_RW(pwm4_auto_point2_pwm, pwm_max, 3);
1065 
1066 static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point1_temp, pwm_tmin, 0);
1067 static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point1_temp, pwm_tmin, 1);
1068 static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point1_temp, pwm_tmin, 2);
1069 static SENSOR_DEVICE_ATTR_RW(pwm4_auto_point1_temp, pwm_tmin, 3);
1070 
1071 static SENSOR_DEVICE_ATTR_RO(pwm1_auto_point2_temp, pwm_tmax, 0);
1072 static SENSOR_DEVICE_ATTR_RO(pwm2_auto_point2_temp, pwm_tmax, 1);
1073 static SENSOR_DEVICE_ATTR_RO(pwm3_auto_point2_temp, pwm_tmax, 2);
1074 static SENSOR_DEVICE_ATTR_RO(pwm4_auto_point2_temp, pwm_tmax, 3);
1075 
1076 static SENSOR_DEVICE_ATTR_RW(pwm1_enable, pwm_auto, 0);
1077 static SENSOR_DEVICE_ATTR_RW(pwm2_enable, pwm_auto, 1);
1078 static SENSOR_DEVICE_ATTR_RW(pwm3_enable, pwm_auto, 2);
1079 static SENSOR_DEVICE_ATTR_RW(pwm4_enable, pwm_auto, 3);
1080 
1081 static SENSOR_DEVICE_ATTR_RW(pwm1_auto_channels_temp, pwm_auto_temp, 0);
1082 static SENSOR_DEVICE_ATTR_RW(pwm2_auto_channels_temp, pwm_auto_temp, 1);
1083 static SENSOR_DEVICE_ATTR_RW(pwm3_auto_channels_temp, pwm_auto_temp, 2);
1084 static SENSOR_DEVICE_ATTR_RW(pwm4_auto_channels_temp, pwm_auto_temp, 3);
1085 
1086 static struct attribute *adt7470_attrs[] = {
1087         &dev_attr_alarm_mask.attr,
1088         &dev_attr_num_temp_sensors.attr,
1089         &dev_attr_auto_update_interval.attr,
1090         &sensor_dev_attr_temp1_max.dev_attr.attr,
1091         &sensor_dev_attr_temp2_max.dev_attr.attr,
1092         &sensor_dev_attr_temp3_max.dev_attr.attr,
1093         &sensor_dev_attr_temp4_max.dev_attr.attr,
1094         &sensor_dev_attr_temp5_max.dev_attr.attr,
1095         &sensor_dev_attr_temp6_max.dev_attr.attr,
1096         &sensor_dev_attr_temp7_max.dev_attr.attr,
1097         &sensor_dev_attr_temp8_max.dev_attr.attr,
1098         &sensor_dev_attr_temp9_max.dev_attr.attr,
1099         &sensor_dev_attr_temp10_max.dev_attr.attr,
1100         &sensor_dev_attr_temp1_min.dev_attr.attr,
1101         &sensor_dev_attr_temp2_min.dev_attr.attr,
1102         &sensor_dev_attr_temp3_min.dev_attr.attr,
1103         &sensor_dev_attr_temp4_min.dev_attr.attr,
1104         &sensor_dev_attr_temp5_min.dev_attr.attr,
1105         &sensor_dev_attr_temp6_min.dev_attr.attr,
1106         &sensor_dev_attr_temp7_min.dev_attr.attr,
1107         &sensor_dev_attr_temp8_min.dev_attr.attr,
1108         &sensor_dev_attr_temp9_min.dev_attr.attr,
1109         &sensor_dev_attr_temp10_min.dev_attr.attr,
1110         &sensor_dev_attr_temp1_input.dev_attr.attr,
1111         &sensor_dev_attr_temp2_input.dev_attr.attr,
1112         &sensor_dev_attr_temp3_input.dev_attr.attr,
1113         &sensor_dev_attr_temp4_input.dev_attr.attr,
1114         &sensor_dev_attr_temp5_input.dev_attr.attr,
1115         &sensor_dev_attr_temp6_input.dev_attr.attr,
1116         &sensor_dev_attr_temp7_input.dev_attr.attr,
1117         &sensor_dev_attr_temp8_input.dev_attr.attr,
1118         &sensor_dev_attr_temp9_input.dev_attr.attr,
1119         &sensor_dev_attr_temp10_input.dev_attr.attr,
1120         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1121         &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1122         &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1123         &sensor_dev_attr_temp4_alarm.dev_attr.attr,
1124         &sensor_dev_attr_temp5_alarm.dev_attr.attr,
1125         &sensor_dev_attr_temp6_alarm.dev_attr.attr,
1126         &sensor_dev_attr_temp7_alarm.dev_attr.attr,
1127         &sensor_dev_attr_temp8_alarm.dev_attr.attr,
1128         &sensor_dev_attr_temp9_alarm.dev_attr.attr,
1129         &sensor_dev_attr_temp10_alarm.dev_attr.attr,
1130         &sensor_dev_attr_fan1_max.dev_attr.attr,
1131         &sensor_dev_attr_fan2_max.dev_attr.attr,
1132         &sensor_dev_attr_fan3_max.dev_attr.attr,
1133         &sensor_dev_attr_fan4_max.dev_attr.attr,
1134         &sensor_dev_attr_fan1_min.dev_attr.attr,
1135         &sensor_dev_attr_fan2_min.dev_attr.attr,
1136         &sensor_dev_attr_fan3_min.dev_attr.attr,
1137         &sensor_dev_attr_fan4_min.dev_attr.attr,
1138         &sensor_dev_attr_fan1_input.dev_attr.attr,
1139         &sensor_dev_attr_fan2_input.dev_attr.attr,
1140         &sensor_dev_attr_fan3_input.dev_attr.attr,
1141         &sensor_dev_attr_fan4_input.dev_attr.attr,
1142         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1143         &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1144         &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1145         &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1146         &sensor_dev_attr_force_pwm_max.dev_attr.attr,
1147         &sensor_dev_attr_pwm1.dev_attr.attr,
1148         &dev_attr_pwm1_freq.attr,
1149         &sensor_dev_attr_pwm2.dev_attr.attr,
1150         &sensor_dev_attr_pwm3.dev_attr.attr,
1151         &sensor_dev_attr_pwm4.dev_attr.attr,
1152         &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1153         &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1154         &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1155         &sensor_dev_attr_pwm4_auto_point1_pwm.dev_attr.attr,
1156         &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1157         &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1158         &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1159         &sensor_dev_attr_pwm4_auto_point2_pwm.dev_attr.attr,
1160         &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
1161         &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
1162         &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
1163         &sensor_dev_attr_pwm4_auto_point1_temp.dev_attr.attr,
1164         &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
1165         &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
1166         &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
1167         &sensor_dev_attr_pwm4_auto_point2_temp.dev_attr.attr,
1168         &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1169         &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1170         &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1171         &sensor_dev_attr_pwm4_enable.dev_attr.attr,
1172         &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1173         &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1174         &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1175         &sensor_dev_attr_pwm4_auto_channels_temp.dev_attr.attr,
1176         NULL
1177 };
1178 
1179 ATTRIBUTE_GROUPS(adt7470);
1180 
1181 /* Return 0 if detection is successful, -ENODEV otherwise */
1182 static int adt7470_detect(struct i2c_client *client,
1183                           struct i2c_board_info *info)
1184 {
1185         struct i2c_adapter *adapter = client->adapter;
1186         int vendor, device, revision;
1187 
1188         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1189                 return -ENODEV;
1190 
1191         vendor = i2c_smbus_read_byte_data(client, ADT7470_REG_VENDOR);
1192         if (vendor != ADT7470_VENDOR)
1193                 return -ENODEV;
1194 
1195         device = i2c_smbus_read_byte_data(client, ADT7470_REG_DEVICE);
1196         if (device != ADT7470_DEVICE)
1197                 return -ENODEV;
1198 
1199         revision = i2c_smbus_read_byte_data(client, ADT7470_REG_REVISION);
1200         if (revision != ADT7470_REVISION)
1201                 return -ENODEV;
1202 
1203         strlcpy(info->type, "adt7470", I2C_NAME_SIZE);
1204 
1205         return 0;
1206 }
1207 
1208 static void adt7470_init_client(struct i2c_client *client)
1209 {
1210         int reg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
1211 
1212         if (reg < 0) {
1213                 dev_err(&client->dev, "cannot read configuration register\n");
1214         } else {
1215                 /* start monitoring (and do a self-test) */
1216                 i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, reg | 3);
1217         }
1218 }
1219 
1220 static int adt7470_probe(struct i2c_client *client,
1221                          const struct i2c_device_id *id)
1222 {
1223         struct device *dev = &client->dev;
1224         struct adt7470_data *data;
1225         struct device *hwmon_dev;
1226 
1227         data = devm_kzalloc(dev, sizeof(struct adt7470_data), GFP_KERNEL);
1228         if (!data)
1229                 return -ENOMEM;
1230 
1231         data->num_temp_sensors = -1;
1232         data->auto_update_interval = AUTO_UPDATE_INTERVAL;
1233 
1234         i2c_set_clientdata(client, data);
1235         data->client = client;
1236         mutex_init(&data->lock);
1237 
1238         dev_info(&client->dev, "%s chip found\n", client->name);
1239 
1240         /* Initialize the ADT7470 chip */
1241         adt7470_init_client(client);
1242 
1243         /* Register sysfs hooks */
1244         hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
1245                                                            data,
1246                                                            adt7470_groups);
1247 
1248         if (IS_ERR(hwmon_dev))
1249                 return PTR_ERR(hwmon_dev);
1250 
1251         data->auto_update = kthread_run(adt7470_update_thread, client, "%s",
1252                                         dev_name(hwmon_dev));
1253         if (IS_ERR(data->auto_update)) {
1254                 return PTR_ERR(data->auto_update);
1255         }
1256 
1257         return 0;
1258 }
1259 
1260 static int adt7470_remove(struct i2c_client *client)
1261 {
1262         struct adt7470_data *data = i2c_get_clientdata(client);
1263 
1264         kthread_stop(data->auto_update);
1265         return 0;
1266 }
1267 
1268 static const struct i2c_device_id adt7470_id[] = {
1269         { "adt7470", 0 },
1270         { }
1271 };
1272 MODULE_DEVICE_TABLE(i2c, adt7470_id);
1273 
1274 static struct i2c_driver adt7470_driver = {
1275         .class          = I2C_CLASS_HWMON,
1276         .driver = {
1277                 .name   = "adt7470",
1278         },
1279         .probe          = adt7470_probe,
1280         .remove         = adt7470_remove,
1281         .id_table       = adt7470_id,
1282         .detect         = adt7470_detect,
1283         .address_list   = normal_i2c,
1284 };
1285 
1286 module_i2c_driver(adt7470_driver);
1287 
1288 MODULE_AUTHOR("Darrick J. Wong <darrick.wong@oracle.com>");
1289 MODULE_DESCRIPTION("ADT7470 driver");
1290 MODULE_LICENSE("GPL");

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