drivers/hwmon/f75375s.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * f75375s.c - driver for the Fintek F75375/SP, F75373 and
   4  *             F75387SG/RG hardware monitoring features
   5  * Copyright (C) 2006-2007  Riku Voipio
   6  *
   7  * Datasheets available at:
   8  *
   9  * f75375:
  10  * http://www.fintek.com.tw/files/productfiles/F75375_V026P.pdf
  11  *
  12  * f75373:
  13  * http://www.fintek.com.tw/files/productfiles/F75373_V025P.pdf
  14  *
  15  * f75387:
  16  * http://www.fintek.com.tw/files/productfiles/F75387_V027P.pdf
  17  */
  18
  19 #include <linux/module.h>
  20 #include <linux/jiffies.h>
  21 #include <linux/hwmon.h>
  22 #include <linux/hwmon-sysfs.h>
  23 #include <linux/i2c.h>
  24 #include <linux/err.h>
  25 #include <linux/mutex.h>
  26 #include <linux/f75375s.h>
  27 #include <linux/slab.h>
  28
  29 /* Addresses to scan */
  30 static const unsigned short normal_i2c[] = { 0x2d, 0x2e, I2C_CLIENT_END };
  31
  32 enum chips { f75373, f75375, f75387 };
  33
  34 /* Fintek F75375 registers  */
  35 #define F75375_REG_CONFIG0              0x0
  36 #define F75375_REG_CONFIG1              0x1
  37 #define F75375_REG_CONFIG2              0x2
  38 #define F75375_REG_CONFIG3              0x3
  39 #define F75375_REG_ADDR                 0x4
  40 #define F75375_REG_INTR                 0x31
  41 #define F75375_CHIP_ID                  0x5A
  42 #define F75375_REG_VERSION              0x5C
  43 #define F75375_REG_VENDOR               0x5D
  44 #define F75375_REG_FAN_TIMER            0x60
  45
  46 #define F75375_REG_VOLT(nr)             (0x10 + (nr))
  47 #define F75375_REG_VOLT_HIGH(nr)        (0x20 + (nr) * 2)
  48 #define F75375_REG_VOLT_LOW(nr)         (0x21 + (nr) * 2)
  49
  50 #define F75375_REG_TEMP(nr)             (0x14 + (nr))
  51 #define F75387_REG_TEMP11_LSB(nr)       (0x1a + (nr))
  52 #define F75375_REG_TEMP_HIGH(nr)        (0x28 + (nr) * 2)
  53 #define F75375_REG_TEMP_HYST(nr)        (0x29 + (nr) * 2)
  54
  55 #define F75375_REG_FAN(nr)              (0x16 + (nr) * 2)
  56 #define F75375_REG_FAN_MIN(nr)          (0x2C + (nr) * 2)
  57 #define F75375_REG_FAN_FULL(nr)         (0x70 + (nr) * 0x10)
  58 #define F75375_REG_FAN_PWM_DUTY(nr)     (0x76 + (nr) * 0x10)
  59 #define F75375_REG_FAN_PWM_CLOCK(nr)    (0x7D + (nr) * 0x10)
  60
  61 #define F75375_REG_FAN_EXP(nr)          (0x74 + (nr) * 0x10)
  62 #define F75375_REG_FAN_B_TEMP(nr, step) ((0xA0 + (nr) * 0x10) + (step))
  63 #define F75375_REG_FAN_B_SPEED(nr, step) \
  64         ((0xA5 + (nr) * 0x10) + (step) * 2)
  65
  66 #define F75375_REG_PWM1_RAISE_DUTY      0x69
  67 #define F75375_REG_PWM2_RAISE_DUTY      0x6A
  68 #define F75375_REG_PWM1_DROP_DUTY       0x6B
  69 #define F75375_REG_PWM2_DROP_DUTY       0x6C
  70
  71 #define F75375_FAN_CTRL_LINEAR(nr)      (4 + nr)
  72 #define F75387_FAN_CTRL_LINEAR(nr)      (1 + ((nr) * 4))
  73 #define FAN_CTRL_MODE(nr)               (4 + ((nr) * 2))
  74 #define F75387_FAN_DUTY_MODE(nr)        (2 + ((nr) * 4))
  75 #define F75387_FAN_MANU_MODE(nr)        ((nr) * 4)
  76
  77 /*
  78  * Data structures and manipulation thereof
  79  */
  80
  81 struct f75375_data {
  82         unsigned short addr;
  83         struct device *hwmon_dev;
  84
  85         const char *name;
  86         int kind;
  87         struct mutex update_lock; /* protect register access */
  88         bool valid;
  89         unsigned long last_updated;     /* In jiffies */
  90         unsigned long last_limits;      /* In jiffies */
  91
  92         /* Register values */
  93         u8 in[4];
  94         u8 in_max[4];
  95         u8 in_min[4];
  96         u16 fan[2];
  97         u16 fan_min[2];
  98         u16 fan_max[2];
  99         u16 fan_target[2];
 100         u8 fan_timer;
 101         u8 pwm[2];
 102         u8 pwm_mode[2];
 103         u8 pwm_enable[2];
 104         /*
 105          * f75387: For remote temperature reading, it uses signed 11-bit
 106          * values with LSB = 0.125 degree Celsius, left-justified in 16-bit
 107          * registers. For original 8-bit temp readings, the LSB just is 0.
 108          */
 109         s16 temp11[2];
 110         s8 temp_high[2];
 111         s8 temp_max_hyst[2];
 112 };
 113
 114 static inline int f75375_read8(struct i2c_client *client, u8 reg)
 115 {
 116         return i2c_smbus_read_byte_data(client, reg);
 117 }
 118
 119 /* in most cases, should be called while holding update_lock */
 120 static inline u16 f75375_read16(struct i2c_client *client, u8 reg)
 121 {
 122         return (i2c_smbus_read_byte_data(client, reg) << 8)
 123                 | i2c_smbus_read_byte_data(client, reg + 1);
 124 }
 125
 126 static inline void f75375_write8(struct i2c_client *client, u8 reg,
 127                 u8 value)
 128 {
 129         i2c_smbus_write_byte_data(client, reg, value);
 130 }
 131
 132 static inline void f75375_write16(struct i2c_client *client, u8 reg,
 133                 u16 value)
 134 {
 135         int err = i2c_smbus_write_byte_data(client, reg, (value >> 8));
 136         if (err)
 137                 return;
 138         i2c_smbus_write_byte_data(client, reg + 1, (value & 0xFF));
 139 }
 140
 141 static void f75375_write_pwm(struct i2c_client *client, int nr)
 142 {
 143         struct f75375_data *data = i2c_get_clientdata(client);
 144         if (data->kind == f75387)
 145                 f75375_write16(client, F75375_REG_FAN_EXP(nr), data->pwm[nr]);
 146         else
 147                 f75375_write8(client, F75375_REG_FAN_PWM_DUTY(nr),
 148                               data->pwm[nr]);
 149 }
 150
 151 static struct f75375_data *f75375_update_device(struct device *dev)
 152 {
 153         struct i2c_client *client = to_i2c_client(dev);
 154         struct f75375_data *data = i2c_get_clientdata(client);
 155         int nr;
 156
 157         mutex_lock(&data->update_lock);
 158
 159         /* Limit registers cache is refreshed after 60 seconds */
 160         if (time_after(jiffies, data->last_limits + 60 * HZ)
 161                 || !data->valid) {
 162                 for (nr = 0; nr < 2; nr++) {
 163                         data->temp_high[nr] =
 164                                 f75375_read8(client, F75375_REG_TEMP_HIGH(nr));
 165                         data->temp_max_hyst[nr] =
 166                                 f75375_read8(client, F75375_REG_TEMP_HYST(nr));
 167                         data->fan_max[nr] =
 168                                 f75375_read16(client, F75375_REG_FAN_FULL(nr));
 169                         data->fan_min[nr] =
 170                                 f75375_read16(client, F75375_REG_FAN_MIN(nr));
 171                         data->fan_target[nr] =
 172                                 f75375_read16(client, F75375_REG_FAN_EXP(nr));
 173                 }
 174                 for (nr = 0; nr < 4; nr++) {
 175                         data->in_max[nr] =
 176                                 f75375_read8(client, F75375_REG_VOLT_HIGH(nr));
 177                         data->in_min[nr] =
 178                                 f75375_read8(client, F75375_REG_VOLT_LOW(nr));
 179                 }
 180                 data->fan_timer = f75375_read8(client, F75375_REG_FAN_TIMER);
 181                 data->last_limits = jiffies;
 182         }
 183
 184         /* Measurement registers cache is refreshed after 2 second */
 185         if (time_after(jiffies, data->last_updated + 2 * HZ)
 186                 || !data->valid) {
 187                 for (nr = 0; nr < 2; nr++) {
 188                         data->pwm[nr] = f75375_read8(client,
 189                                 F75375_REG_FAN_PWM_DUTY(nr));
 190                         /* assign MSB, therefore shift it by 8 bits */
 191                         data->temp11[nr] =
 192                                 f75375_read8(client, F75375_REG_TEMP(nr)) << 8;
 193                         if (data->kind == f75387)
 194                                 /* merge F75387's temperature LSB (11-bit) */
 195                                 data->temp11[nr] |=
 196                                         f75375_read8(client,
 197                                                      F75387_REG_TEMP11_LSB(nr));
 198                         data->fan[nr] =
 199                                 f75375_read16(client, F75375_REG_FAN(nr));
 200                 }
 201                 for (nr = 0; nr < 4; nr++)
 202                         data->in[nr] =
 203                                 f75375_read8(client, F75375_REG_VOLT(nr));
 204
 205                 data->last_updated = jiffies;
 206                 data->valid = true;
 207         }
 208
 209         mutex_unlock(&data->update_lock);
 210         return data;
 211 }
 212
 213 static inline u16 rpm_from_reg(u16 reg)
 214 {
 215         if (reg == 0 || reg == 0xffff)
 216                 return 0;
 217         return 1500000 / reg;
 218 }
 219
 220 static inline u16 rpm_to_reg(int rpm)
 221 {
 222         if (rpm < 367 || rpm > 0xffff)
 223                 return 0xffff;
 224         return 1500000 / rpm;
 225 }
 226
 227 static bool duty_mode_enabled(u8 pwm_enable)
 228 {
 229         switch (pwm_enable) {
 230         case 0: /* Manual, duty mode (full speed) */
 231         case 1: /* Manual, duty mode */
 232         case 4: /* Auto, duty mode */
 233                 return true;
 234         case 2: /* Auto, speed mode */
 235         case 3: /* Manual, speed mode */
 236                 return false;
 237         default:
 238                 WARN(1, "Unexpected pwm_enable value %d\n", pwm_enable);
 239                 return true;
 240         }
 241 }
 242
 243 static bool auto_mode_enabled(u8 pwm_enable)
 244 {
 245         switch (pwm_enable) {
 246         case 0: /* Manual, duty mode (full speed) */
 247         case 1: /* Manual, duty mode */
 248         case 3: /* Manual, speed mode */
 249                 return false;
 250         case 2: /* Auto, speed mode */
 251         case 4: /* Auto, duty mode */
 252                 return true;
 253         default:
 254                 WARN(1, "Unexpected pwm_enable value %d\n", pwm_enable);
 255                 return false;
 256         }
 257 }
 258
 259 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
 260                 const char *buf, size_t count)
 261 {
 262         int nr = to_sensor_dev_attr(attr)->index;
 263         struct i2c_client *client = to_i2c_client(dev);
 264         struct f75375_data *data = i2c_get_clientdata(client);
 265         unsigned long val;
 266         int err;
 267
 268         err = kstrtoul(buf, 10, &val);
 269         if (err < 0)
 270                 return err;
 271
 272         mutex_lock(&data->update_lock);
 273         data->fan_min[nr] = rpm_to_reg(val);
 274         f75375_write16(client, F75375_REG_FAN_MIN(nr), data->fan_min[nr]);
 275         mutex_unlock(&data->update_lock);
 276         return count;
 277 }
 278
 279 static ssize_t set_fan_target(struct device *dev, struct device_attribute *attr,
 280                 const char *buf, size_t count)
 281 {
 282         int nr = to_sensor_dev_attr(attr)->index;
 283         struct i2c_client *client = to_i2c_client(dev);
 284         struct f75375_data *data = i2c_get_clientdata(client);
 285         unsigned long val;
 286         int err;
 287
 288         err = kstrtoul(buf, 10, &val);
 289         if (err < 0)
 290                 return err;
 291
 292         if (auto_mode_enabled(data->pwm_enable[nr]))
 293                 return -EINVAL;
 294         if (data->kind == f75387 && duty_mode_enabled(data->pwm_enable[nr]))
 295                 return -EINVAL;
 296
 297         mutex_lock(&data->update_lock);
 298         data->fan_target[nr] = rpm_to_reg(val);
 299         f75375_write16(client, F75375_REG_FAN_EXP(nr), data->fan_target[nr]);
 300         mutex_unlock(&data->update_lock);
 301         return count;
 302 }
 303
 304 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
 305                 const char *buf, size_t count)
 306 {
 307         int nr = to_sensor_dev_attr(attr)->index;
 308         struct i2c_client *client = to_i2c_client(dev);
 309         struct f75375_data *data = i2c_get_clientdata(client);
 310         unsigned long val;
 311         int err;
 312
 313         err = kstrtoul(buf, 10, &val);
 314         if (err < 0)
 315                 return err;
 316
 317         if (auto_mode_enabled(data->pwm_enable[nr]) ||
 318             !duty_mode_enabled(data->pwm_enable[nr]))
 319                 return -EINVAL;
 320
 321         mutex_lock(&data->update_lock);
 322         data->pwm[nr] = clamp_val(val, 0, 255);
 323         f75375_write_pwm(client, nr);
 324         mutex_unlock(&data->update_lock);
 325         return count;
 326 }
 327
 328 static ssize_t show_pwm_enable(struct device *dev, struct device_attribute
 329                 *attr, char *buf)
 330 {
 331         int nr = to_sensor_dev_attr(attr)->index;
 332         struct f75375_data *data = f75375_update_device(dev);
 333         return sprintf(buf, "%d\n", data->pwm_enable[nr]);
 334 }
 335
 336 static int set_pwm_enable_direct(struct i2c_client *client, int nr, int val)
 337 {
 338         struct f75375_data *data = i2c_get_clientdata(client);
 339         u8 fanmode;
 340
 341         if (val < 0 || val > 4)
 342                 return -EINVAL;
 343
 344         fanmode = f75375_read8(client, F75375_REG_FAN_TIMER);
 345         if (data->kind == f75387) {
 346                 /* For now, deny dangerous toggling of duty mode */
 347                 if (duty_mode_enabled(data->pwm_enable[nr]) !=
 348                                 duty_mode_enabled(val))
 349                         return -EOPNOTSUPP;
 350                 /* clear each fanX_mode bit before setting them properly */
 351                 fanmode &= ~(1 << F75387_FAN_DUTY_MODE(nr));
 352                 fanmode &= ~(1 << F75387_FAN_MANU_MODE(nr));
 353                 switch (val) {
 354                 case 0: /* full speed */
 355                         fanmode |= (1 << F75387_FAN_MANU_MODE(nr));
 356                         fanmode |= (1 << F75387_FAN_DUTY_MODE(nr));
 357                         data->pwm[nr] = 255;
 358                         break;
 359                 case 1: /* PWM */
 360                         fanmode  |= (1 << F75387_FAN_MANU_MODE(nr));
 361                         fanmode  |= (1 << F75387_FAN_DUTY_MODE(nr));
 362                         break;
 363                 case 2: /* Automatic, speed mode */
 364                         break;
 365                 case 3: /* fan speed */
 366                         fanmode |= (1 << F75387_FAN_MANU_MODE(nr));
 367                         break;
 368                 case 4: /* Automatic, pwm */
 369                         fanmode |= (1 << F75387_FAN_DUTY_MODE(nr));
 370                         break;
 371                 }
 372         } else {
 373                 /* clear each fanX_mode bit before setting them properly */
 374                 fanmode &= ~(3 << FAN_CTRL_MODE(nr));
 375                 switch (val) {
 376                 case 0: /* full speed */
 377                         fanmode  |= (3 << FAN_CTRL_MODE(nr));
 378                         data->pwm[nr] = 255;
 379                         break;
 380                 case 1: /* PWM */
 381                         fanmode  |= (3 << FAN_CTRL_MODE(nr));
 382                         break;
 383                 case 2: /* AUTOMATIC*/
 384                         fanmode  |= (1 << FAN_CTRL_MODE(nr));
 385                         break;
 386                 case 3: /* fan speed */
 387                         break;
 388                 case 4: /* Automatic pwm */
 389                         return -EINVAL;
 390                 }
 391         }
 392
 393         f75375_write8(client, F75375_REG_FAN_TIMER, fanmode);
 394         data->pwm_enable[nr] = val;
 395         if (val == 0)
 396                 f75375_write_pwm(client, nr);
 397         return 0;
 398 }
 399
 400 static ssize_t set_pwm_enable(struct device *dev, struct device_attribute *attr,
 401                 const char *buf, size_t count)
 402 {
 403         int nr = to_sensor_dev_attr(attr)->index;
 404         struct i2c_client *client = to_i2c_client(dev);
 405         struct f75375_data *data = i2c_get_clientdata(client);
 406         unsigned long val;
 407         int err;
 408
 409         err = kstrtoul(buf, 10, &val);
 410         if (err < 0)
 411                 return err;
 412
 413         mutex_lock(&data->update_lock);
 414         err = set_pwm_enable_direct(client, nr, val);
 415         mutex_unlock(&data->update_lock);
 416         return err ? err : count;
 417 }
 418
 419 static ssize_t set_pwm_mode(struct device *dev, struct device_attribute *attr,
 420                 const char *buf, size_t count)
 421 {
 422         int nr = to_sensor_dev_attr(attr)->index;
 423         struct i2c_client *client = to_i2c_client(dev);
 424         struct f75375_data *data = i2c_get_clientdata(client);
 425         unsigned long val;
 426         int err;
 427         u8 conf;
 428         char reg, ctrl;
 429
 430         err = kstrtoul(buf, 10, &val);
 431         if (err < 0)
 432                 return err;
 433
 434         if (!(val == 0 || val == 1))
 435                 return -EINVAL;
 436
 437         /* F75373 does not support DC (linear voltage) fan control mode */
 438         if (data->kind == f75373 && val == 0)
 439                 return -EINVAL;
 440
 441         /* take care for different registers */
 442         if (data->kind == f75387) {
 443                 reg = F75375_REG_FAN_TIMER;
 444                 ctrl = F75387_FAN_CTRL_LINEAR(nr);
 445         } else {
 446                 reg = F75375_REG_CONFIG1;
 447                 ctrl = F75375_FAN_CTRL_LINEAR(nr);
 448         }
 449
 450         mutex_lock(&data->update_lock);
 451         conf = f75375_read8(client, reg);
 452         conf &= ~(1 << ctrl);
 453
 454         if (val == 0)
 455                 conf |= (1 << ctrl);
 456
 457         f75375_write8(client, reg, conf);
 458         data->pwm_mode[nr] = val;
 459         mutex_unlock(&data->update_lock);
 460         return count;
 461 }
 462
 463 static ssize_t show_pwm(struct device *dev, struct device_attribute
 464                 *attr, char *buf)
 465 {
 466         int nr = to_sensor_dev_attr(attr)->index;
 467         struct f75375_data *data = f75375_update_device(dev);
 468         return sprintf(buf, "%d\n", data->pwm[nr]);
 469 }
 470
 471 static ssize_t show_pwm_mode(struct device *dev, struct device_attribute
 472                 *attr, char *buf)
 473 {
 474         int nr = to_sensor_dev_attr(attr)->index;
 475         struct f75375_data *data = f75375_update_device(dev);
 476         return sprintf(buf, "%d\n", data->pwm_mode[nr]);
 477 }
 478
 479 #define VOLT_FROM_REG(val) ((val) * 8)
 480 #define VOLT_TO_REG(val) ((val) / 8)
 481
 482 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
 483                 char *buf)
 484 {
 485         int nr = to_sensor_dev_attr(attr)->index;
 486         struct f75375_data *data = f75375_update_device(dev);
 487         return sprintf(buf, "%d\n", VOLT_FROM_REG(data->in[nr]));
 488 }
 489
 490 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
 491                 char *buf)
 492 {
 493         int nr = to_sensor_dev_attr(attr)->index;
 494         struct f75375_data *data = f75375_update_device(dev);
 495         return sprintf(buf, "%d\n", VOLT_FROM_REG(data->in_max[nr]));
 496 }
 497
 498 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
 499                 char *buf)
 500 {
 501         int nr = to_sensor_dev_attr(attr)->index;
 502         struct f75375_data *data = f75375_update_device(dev);
 503         return sprintf(buf, "%d\n", VOLT_FROM_REG(data->in_min[nr]));
 504 }
 505
 506 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
 507                 const char *buf, size_t count)
 508 {
 509         int nr = to_sensor_dev_attr(attr)->index;
 510         struct i2c_client *client = to_i2c_client(dev);
 511         struct f75375_data *data = i2c_get_clientdata(client);
 512         unsigned long val;
 513         int err;
 514
 515         err = kstrtoul(buf, 10, &val);
 516         if (err < 0)
 517                 return err;
 518
 519         val = clamp_val(VOLT_TO_REG(val), 0, 0xff);
 520         mutex_lock(&data->update_lock);
 521         data->in_max[nr] = val;
 522         f75375_write8(client, F75375_REG_VOLT_HIGH(nr), data->in_max[nr]);
 523         mutex_unlock(&data->update_lock);
 524         return count;
 525 }
 526
 527 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
 528                 const char *buf, size_t count)
 529 {
 530         int nr = to_sensor_dev_attr(attr)->index;
 531         struct i2c_client *client = to_i2c_client(dev);
 532         struct f75375_data *data = i2c_get_clientdata(client);
 533         unsigned long val;
 534         int err;
 535
 536         err = kstrtoul(buf, 10, &val);
 537         if (err < 0)
 538                 return err;
 539
 540         val = clamp_val(VOLT_TO_REG(val), 0, 0xff);
 541         mutex_lock(&data->update_lock);
 542         data->in_min[nr] = val;
 543         f75375_write8(client, F75375_REG_VOLT_LOW(nr), data->in_min[nr]);
 544         mutex_unlock(&data->update_lock);
 545         return count;
 546 }
 547 #define TEMP_FROM_REG(val) ((val) * 1000)
 548 #define TEMP_TO_REG(val) ((val) / 1000)
 549 #define TEMP11_FROM_REG(reg)    ((reg) / 32 * 125)
 550
 551 static ssize_t show_temp11(struct device *dev, struct device_attribute *attr,
 552                 char *buf)
 553 {
 554         int nr = to_sensor_dev_attr(attr)->index;
 555         struct f75375_data *data = f75375_update_device(dev);
 556         return sprintf(buf, "%d\n", TEMP11_FROM_REG(data->temp11[nr]));
 557 }
 558
 559 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
 560                 char *buf)
 561 {
 562         int nr = to_sensor_dev_attr(attr)->index;
 563         struct f75375_data *data = f75375_update_device(dev);
 564         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr]));
 565 }
 566
 567 static ssize_t show_temp_max_hyst(struct device *dev,
 568                 struct device_attribute *attr, char *buf)
 569 {
 570         int nr = to_sensor_dev_attr(attr)->index;
 571         struct f75375_data *data = f75375_update_device(dev);
 572         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[nr]));
 573 }
 574
 575 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
 576                 const char *buf, size_t count)
 577 {
 578         int nr = to_sensor_dev_attr(attr)->index;
 579         struct i2c_client *client = to_i2c_client(dev);
 580         struct f75375_data *data = i2c_get_clientdata(client);
 581         unsigned long val;
 582         int err;
 583
 584         err = kstrtoul(buf, 10, &val);
 585         if (err < 0)
 586                 return err;
 587
 588         val = clamp_val(TEMP_TO_REG(val), 0, 127);
 589         mutex_lock(&data->update_lock);
 590         data->temp_high[nr] = val;
 591         f75375_write8(client, F75375_REG_TEMP_HIGH(nr), data->temp_high[nr]);
 592         mutex_unlock(&data->update_lock);
 593         return count;
 594 }
 595
 596 static ssize_t set_temp_max_hyst(struct device *dev,
 597         struct device_attribute *attr, const char *buf, size_t count)
 598 {
 599         int nr = to_sensor_dev_attr(attr)->index;
 600         struct i2c_client *client = to_i2c_client(dev);
 601         struct f75375_data *data = i2c_get_clientdata(client);
 602         unsigned long val;
 603         int err;
 604
 605         err = kstrtoul(buf, 10, &val);
 606         if (err < 0)
 607                 return err;
 608
 609         val = clamp_val(TEMP_TO_REG(val), 0, 127);
 610         mutex_lock(&data->update_lock);
 611         data->temp_max_hyst[nr] = val;
 612         f75375_write8(client, F75375_REG_TEMP_HYST(nr),
 613                 data->temp_max_hyst[nr]);
 614         mutex_unlock(&data->update_lock);
 615         return count;
 616 }
 617
 618 #define show_fan(thing) \
 619 static ssize_t show_##thing(struct device *dev, struct device_attribute *attr, \
 620                         char *buf)\
 621 {\
 622         int nr = to_sensor_dev_attr(attr)->index;\
 623         struct f75375_data *data = f75375_update_device(dev); \
 624         return sprintf(buf, "%d\n", rpm_from_reg(data->thing[nr])); \
 625 }
 626
 627 show_fan(fan);
 628 show_fan(fan_min);
 629 show_fan(fan_max);
 630 show_fan(fan_target);
 631
 632 static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_in, NULL, 0);
 633 static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO|S_IWUSR,
 634         show_in_max, set_in_max, 0);
 635 static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO|S_IWUSR,
 636         show_in_min, set_in_min, 0);
 637 static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in, NULL, 1);
 638 static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO|S_IWUSR,
 639         show_in_max, set_in_max, 1);
 640 static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO|S_IWUSR,
 641         show_in_min, set_in_min, 1);
 642 static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in, NULL, 2);
 643 static SENSOR_DEVICE_ATTR(in2_max, S_IRUGO|S_IWUSR,
 644         show_in_max, set_in_max, 2);
 645 static SENSOR_DEVICE_ATTR(in2_min, S_IRUGO|S_IWUSR,
 646         show_in_min, set_in_min, 2);
 647 static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in, NULL, 3);
 648 static SENSOR_DEVICE_ATTR(in3_max, S_IRUGO|S_IWUSR,
 649         show_in_max, set_in_max, 3);
 650 static SENSOR_DEVICE_ATTR(in3_min, S_IRUGO|S_IWUSR,
 651         show_in_min, set_in_min, 3);
 652 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp11, NULL, 0);
 653 static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO|S_IWUSR,
 654         show_temp_max_hyst, set_temp_max_hyst, 0);
 655 static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO|S_IWUSR,
 656         show_temp_max, set_temp_max, 0);
 657 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 1);
 658 static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO|S_IWUSR,
 659         show_temp_max_hyst, set_temp_max_hyst, 1);
 660 static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO|S_IWUSR,
 661         show_temp_max, set_temp_max, 1);
 662 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
 663 static SENSOR_DEVICE_ATTR(fan1_max, S_IRUGO, show_fan_max, NULL, 0);
 664 static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO|S_IWUSR,
 665         show_fan_min, set_fan_min, 0);
 666 static SENSOR_DEVICE_ATTR(fan1_target, S_IRUGO|S_IWUSR,
 667         show_fan_target, set_fan_target, 0);
 668 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
 669 static SENSOR_DEVICE_ATTR(fan2_max, S_IRUGO, show_fan_max, NULL, 1);
 670 static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO|S_IWUSR,
 671         show_fan_min, set_fan_min, 1);
 672 static SENSOR_DEVICE_ATTR(fan2_target, S_IRUGO|S_IWUSR,
 673         show_fan_target, set_fan_target, 1);
 674 static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO|S_IWUSR,
 675         show_pwm, set_pwm, 0);
 676 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IRUGO|S_IWUSR,
 677         show_pwm_enable, set_pwm_enable, 0);
 678 static SENSOR_DEVICE_ATTR(pwm1_mode, S_IRUGO,
 679         show_pwm_mode, set_pwm_mode, 0);
 680 static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR,
 681         show_pwm, set_pwm, 1);
 682 static SENSOR_DEVICE_ATTR(pwm2_enable, S_IRUGO|S_IWUSR,
 683         show_pwm_enable, set_pwm_enable, 1);
 684 static SENSOR_DEVICE_ATTR(pwm2_mode, S_IRUGO,
 685         show_pwm_mode, set_pwm_mode, 1);
 686
 687 static struct attribute *f75375_attributes[] = {
 688         &sensor_dev_attr_temp1_input.dev_attr.attr,
 689         &sensor_dev_attr_temp1_max.dev_attr.attr,
 690         &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
 691         &sensor_dev_attr_temp2_input.dev_attr.attr,
 692         &sensor_dev_attr_temp2_max.dev_attr.attr,
 693         &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
 694         &sensor_dev_attr_fan1_input.dev_attr.attr,
 695         &sensor_dev_attr_fan1_max.dev_attr.attr,
 696         &sensor_dev_attr_fan1_min.dev_attr.attr,
 697         &sensor_dev_attr_fan1_target.dev_attr.attr,
 698         &sensor_dev_attr_fan2_input.dev_attr.attr,
 699         &sensor_dev_attr_fan2_max.dev_attr.attr,
 700         &sensor_dev_attr_fan2_min.dev_attr.attr,
 701         &sensor_dev_attr_fan2_target.dev_attr.attr,
 702         &sensor_dev_attr_pwm1.dev_attr.attr,
 703         &sensor_dev_attr_pwm1_enable.dev_attr.attr,
 704         &sensor_dev_attr_pwm1_mode.dev_attr.attr,
 705         &sensor_dev_attr_pwm2.dev_attr.attr,
 706         &sensor_dev_attr_pwm2_enable.dev_attr.attr,
 707         &sensor_dev_attr_pwm2_mode.dev_attr.attr,
 708         &sensor_dev_attr_in0_input.dev_attr.attr,
 709         &sensor_dev_attr_in0_max.dev_attr.attr,
 710         &sensor_dev_attr_in0_min.dev_attr.attr,
 711         &sensor_dev_attr_in1_input.dev_attr.attr,
 712         &sensor_dev_attr_in1_max.dev_attr.attr,
 713         &sensor_dev_attr_in1_min.dev_attr.attr,
 714         &sensor_dev_attr_in2_input.dev_attr.attr,
 715         &sensor_dev_attr_in2_max.dev_attr.attr,
 716         &sensor_dev_attr_in2_min.dev_attr.attr,
 717         &sensor_dev_attr_in3_input.dev_attr.attr,
 718         &sensor_dev_attr_in3_max.dev_attr.attr,
 719         &sensor_dev_attr_in3_min.dev_attr.attr,
 720         NULL
 721 };
 722
 723 static const struct attribute_group f75375_group = {
 724         .attrs = f75375_attributes,
 725 };
 726
 727 static void f75375_init(struct i2c_client *client, struct f75375_data *data,
 728                 struct f75375s_platform_data *f75375s_pdata)
 729 {
 730         int nr;
 731
 732         if (!f75375s_pdata) {
 733                 u8 conf, mode;
 734                 int nr;
 735
 736                 conf = f75375_read8(client, F75375_REG_CONFIG1);
 737                 mode = f75375_read8(client, F75375_REG_FAN_TIMER);
 738                 for (nr = 0; nr < 2; nr++) {
 739                         if (data->kind == f75387) {
 740                                 bool manu, duty;
 741
 742                                 if (!(mode & (1 << F75387_FAN_CTRL_LINEAR(nr))))
 743                                         data->pwm_mode[nr] = 1;
 744
 745                                 manu = ((mode >> F75387_FAN_MANU_MODE(nr)) & 1);
 746                                 duty = ((mode >> F75387_FAN_DUTY_MODE(nr)) & 1);
 747                                 if (!manu && duty)
 748                                         /* auto, pwm */
 749                                         data->pwm_enable[nr] = 4;
 750                                 else if (manu && !duty)
 751                                         /* manual, speed */
 752                                         data->pwm_enable[nr] = 3;
 753                                 else if (!manu && !duty)
 754                                         /* automatic, speed */
 755                                         data->pwm_enable[nr] = 2;
 756                                 else
 757                                         /* manual, pwm */
 758                                         data->pwm_enable[nr] = 1;
 759                         } else {
 760                                 if (!(conf & (1 << F75375_FAN_CTRL_LINEAR(nr))))
 761                                         data->pwm_mode[nr] = 1;
 762
 763                                 switch ((mode >> FAN_CTRL_MODE(nr)) & 3) {
 764                                 case 0:         /* speed */
 765                                         data->pwm_enable[nr] = 3;
 766                                         break;
 767                                 case 1:         /* automatic */
 768                                         data->pwm_enable[nr] = 2;
 769                                         break;
 770                                 default:        /* manual */
 771                                         data->pwm_enable[nr] = 1;
 772                                         break;
 773                                 }
 774                         }
 775                 }
 776                 return;
 777         }
 778
 779         set_pwm_enable_direct(client, 0, f75375s_pdata->pwm_enable[0]);
 780         set_pwm_enable_direct(client, 1, f75375s_pdata->pwm_enable[1]);
 781         for (nr = 0; nr < 2; nr++) {
 782                 if (auto_mode_enabled(f75375s_pdata->pwm_enable[nr]) ||
 783                     !duty_mode_enabled(f75375s_pdata->pwm_enable[nr]))
 784                         continue;
 785                 data->pwm[nr] = clamp_val(f75375s_pdata->pwm[nr], 0, 255);
 786                 f75375_write_pwm(client, nr);
 787         }
 788
 789 }
 790
 791 static int f75375_probe(struct i2c_client *client)
 792 {
 793         struct f75375_data *data;
 794         struct f75375s_platform_data *f75375s_pdata =
 795                         dev_get_platdata(&client->dev);
 796         int err;
 797
 798         if (!i2c_check_functionality(client->adapter,
 799                                 I2C_FUNC_SMBUS_BYTE_DATA))
 800                 return -EIO;
 801         data = devm_kzalloc(&client->dev, sizeof(struct f75375_data),
 802                             GFP_KERNEL);
 803         if (!data)
 804                 return -ENOMEM;
 805
 806         i2c_set_clientdata(client, data);
 807         mutex_init(&data->update_lock);
 808         data->kind = (uintptr_t)i2c_get_match_data(client);
 809
 810         err = sysfs_create_group(&client->dev.kobj, &f75375_group);
 811         if (err)
 812                 return err;
 813
 814         if (data->kind != f75373) {
 815                 err = sysfs_chmod_file(&client->dev.kobj,
 816                         &sensor_dev_attr_pwm1_mode.dev_attr.attr,
 817                         S_IRUGO | S_IWUSR);
 818                 if (err)
 819                         goto exit_remove;
 820                 err = sysfs_chmod_file(&client->dev.kobj,
 821                         &sensor_dev_attr_pwm2_mode.dev_attr.attr,
 822                         S_IRUGO | S_IWUSR);
 823                 if (err)
 824                         goto exit_remove;
 825         }
 826
 827         data->hwmon_dev = hwmon_device_register(&client->dev);
 828         if (IS_ERR(data->hwmon_dev)) {
 829                 err = PTR_ERR(data->hwmon_dev);
 830                 goto exit_remove;
 831         }
 832
 833         f75375_init(client, data, f75375s_pdata);
 834
 835         return 0;
 836
 837 exit_remove:
 838         sysfs_remove_group(&client->dev.kobj, &f75375_group);
 839         return err;
 840 }
 841
 842 static void f75375_remove(struct i2c_client *client)
 843 {
 844         struct f75375_data *data = i2c_get_clientdata(client);
 845         hwmon_device_unregister(data->hwmon_dev);
 846         sysfs_remove_group(&client->dev.kobj, &f75375_group);
 847 }
 848
 849 /* Return 0 if detection is successful, -ENODEV otherwise */
 850 static int f75375_detect(struct i2c_client *client,
 851                          struct i2c_board_info *info)
 852 {
 853         struct i2c_adapter *adapter = client->adapter;
 854         u16 vendid, chipid;
 855         u8 version;
 856         const char *name;
 857
 858         vendid = f75375_read16(client, F75375_REG_VENDOR);
 859         chipid = f75375_read16(client, F75375_CHIP_ID);
 860         if (vendid != 0x1934)
 861                 return -ENODEV;
 862
 863         if (chipid == 0x0306)
 864                 name = "f75375";
 865         else if (chipid == 0x0204)
 866                 name = "f75373";
 867         else if (chipid == 0x0410)
 868                 name = "f75387";
 869         else
 870                 return -ENODEV;
 871
 872         version = f75375_read8(client, F75375_REG_VERSION);
 873         dev_info(&adapter->dev, "found %s version: %02X\n", name, version);
 874         strscpy(info->type, name, I2C_NAME_SIZE);
 875
 876         return 0;
 877 }
 878
 879 static const struct i2c_device_id f75375_id[] = {
 880         { "f75373", f75373 },
 881         { "f75375", f75375 },
 882         { "f75387", f75387 },
 883         { }
 884 };
 885 MODULE_DEVICE_TABLE(i2c, f75375_id);
 886
 887 static struct i2c_driver f75375_driver = {
 888         .class = I2C_CLASS_HWMON,
 889         .driver = {
 890                 .name = "f75375",
 891         },
 892         .probe = f75375_probe,
 893         .remove = f75375_remove,
 894         .id_table = f75375_id,
 895         .detect = f75375_detect,
 896         .address_list = normal_i2c,
 897 };
 898 module_i2c_driver(f75375_driver);
 899
 900 MODULE_AUTHOR("Riku Voipio");
 901 MODULE_LICENSE("GPL");
 902 MODULE_DESCRIPTION("F75373/F75375/F75387 hardware monitoring driver");