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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * f75375s.c - driver for the Fintek F75375/SP, F75373 and4 * F75387SG/RG hardware monitoring features5 * Copyright (C) 2006-2007 Riku Voipio6 *7 * Datasheets available at:8 *9 * f75375:10 * http://www.fintek.com.tw/files/productfiles/F75375_V026P.pdf11 *12 * f75373:13 * http://www.fintek.com.tw/files/productfiles/F75373_V025P.pdf14 *15 * f75387:16 * http://www.fintek.com.tw/files/productfiles/F75387_V027P.pdf17 */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 */30static const unsigned short normal_i2c[] = { 0x2d, 0x2e, I2C_CLIENT_END };31 32enum chips { f75373, f75375, f75387 };33 34/* Fintek F75375 registers */35#define F75375_REG_CONFIG0 0x036#define F75375_REG_CONFIG1 0x137#define F75375_REG_CONFIG2 0x238#define F75375_REG_CONFIG3 0x339#define F75375_REG_ADDR 0x440#define F75375_REG_INTR 0x3141#define F75375_CHIP_ID 0x5A42#define F75375_REG_VERSION 0x5C43#define F75375_REG_VENDOR 0x5D44#define F75375_REG_FAN_TIMER 0x6045 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 0x6967#define F75375_REG_PWM2_RAISE_DUTY 0x6A68#define F75375_REG_PWM1_DROP_DUTY 0x6B69#define F75375_REG_PWM2_DROP_DUTY 0x6C70 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 thereof79 */80 81struct 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-bit106 * values with LSB = 0.125 degree Celsius, left-justified in 16-bit107 * 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 114static 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 */120static 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 126static 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 132static 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 141static 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 else147 f75375_write8(client, F75375_REG_FAN_PWM_DUTY(nr),148 data->pwm[nr]);149}150 151static 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 213static inline u16 rpm_from_reg(u16 reg)214{215 if (reg == 0 || reg == 0xffff)216 return 0;217 return 1500000 / reg;218}219 220static inline u16 rpm_to_reg(int rpm)221{222 if (rpm < 367 || rpm > 0xffff)223 return 0xffff;224 return 1500000 / rpm;225}226 227static 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 243static 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 259static 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 279static 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 304static 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 328static ssize_t show_pwm_enable(struct device *dev, struct device_attribute329 *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 336static 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 400static 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 419static 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 463static ssize_t show_pwm(struct device *dev, struct device_attribute464 *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 471static ssize_t show_pwm_mode(struct device *dev, struct device_attribute472 *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 482static 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 490static 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 498static 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 506static 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 527static 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 551static 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 559static 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 567static 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 575static 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 596static 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) \619static 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 627show_fan(fan);628show_fan(fan_min);629show_fan(fan_max);630show_fan(fan_target);631 632static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_in, NULL, 0);633static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO|S_IWUSR,634 show_in_max, set_in_max, 0);635static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO|S_IWUSR,636 show_in_min, set_in_min, 0);637static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in, NULL, 1);638static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO|S_IWUSR,639 show_in_max, set_in_max, 1);640static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO|S_IWUSR,641 show_in_min, set_in_min, 1);642static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in, NULL, 2);643static SENSOR_DEVICE_ATTR(in2_max, S_IRUGO|S_IWUSR,644 show_in_max, set_in_max, 2);645static SENSOR_DEVICE_ATTR(in2_min, S_IRUGO|S_IWUSR,646 show_in_min, set_in_min, 2);647static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in, NULL, 3);648static SENSOR_DEVICE_ATTR(in3_max, S_IRUGO|S_IWUSR,649 show_in_max, set_in_max, 3);650static SENSOR_DEVICE_ATTR(in3_min, S_IRUGO|S_IWUSR,651 show_in_min, set_in_min, 3);652static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp11, NULL, 0);653static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO|S_IWUSR,654 show_temp_max_hyst, set_temp_max_hyst, 0);655static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO|S_IWUSR,656 show_temp_max, set_temp_max, 0);657static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 1);658static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO|S_IWUSR,659 show_temp_max_hyst, set_temp_max_hyst, 1);660static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO|S_IWUSR,661 show_temp_max, set_temp_max, 1);662static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);663static SENSOR_DEVICE_ATTR(fan1_max, S_IRUGO, show_fan_max, NULL, 0);664static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO|S_IWUSR,665 show_fan_min, set_fan_min, 0);666static SENSOR_DEVICE_ATTR(fan1_target, S_IRUGO|S_IWUSR,667 show_fan_target, set_fan_target, 0);668static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);669static SENSOR_DEVICE_ATTR(fan2_max, S_IRUGO, show_fan_max, NULL, 1);670static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO|S_IWUSR,671 show_fan_min, set_fan_min, 1);672static SENSOR_DEVICE_ATTR(fan2_target, S_IRUGO|S_IWUSR,673 show_fan_target, set_fan_target, 1);674static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO|S_IWUSR,675 show_pwm, set_pwm, 0);676static SENSOR_DEVICE_ATTR(pwm1_enable, S_IRUGO|S_IWUSR,677 show_pwm_enable, set_pwm_enable, 0);678static SENSOR_DEVICE_ATTR(pwm1_mode, S_IRUGO,679 show_pwm_mode, set_pwm_mode, 0);680static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR,681 show_pwm, set_pwm, 1);682static SENSOR_DEVICE_ATTR(pwm2_enable, S_IRUGO|S_IWUSR,683 show_pwm_enable, set_pwm_enable, 1);684static SENSOR_DEVICE_ATTR(pwm2_mode, S_IRUGO,685 show_pwm_mode, set_pwm_mode, 1);686 687static 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 NULL721};722 723static const struct attribute_group f75375_group = {724 .attrs = f75375_attributes,725};726 727static 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 else757 /* 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 791static 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 837exit_remove:838 sysfs_remove_group(&client->dev.kobj, &f75375_group);839 return err;840}841 842static 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 */850static 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 else870 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 879static const struct i2c_device_id f75375_id[] = {880 { "f75373", f75373 },881 { "f75375", f75375 },882 { "f75387", f75387 },883 { }884};885MODULE_DEVICE_TABLE(i2c, f75375_id);886 887static 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};898module_i2c_driver(f75375_driver);899 900MODULE_AUTHOR("Riku Voipio");901MODULE_LICENSE("GPL");902MODULE_DESCRIPTION("F75373/F75375/F75387 hardware monitoring driver");903