w83l786ng.c revision 2a844c148e1f714ebf42cb96e1b172ce394c36c9
1/* 2 * w83l786ng.c - Linux kernel driver for hardware monitoring 3 * Copyright (c) 2007 Kevin Lo <kevlo@kevlo.org> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation - version 2. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write to the Free Software 16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 17 * 02110-1301 USA. 18 */ 19 20/* 21 * Supports following chips: 22 * 23 * Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA 24 * w83l786ng 3 2 2 2 0x7b 0x5ca3 yes no 25 */ 26 27#include <linux/module.h> 28#include <linux/init.h> 29#include <linux/slab.h> 30#include <linux/i2c.h> 31#include <linux/hwmon.h> 32#include <linux/hwmon-vid.h> 33#include <linux/hwmon-sysfs.h> 34#include <linux/err.h> 35#include <linux/mutex.h> 36#include <linux/jiffies.h> 37 38/* Addresses to scan */ 39static const unsigned short normal_i2c[] = { 0x2e, 0x2f, I2C_CLIENT_END }; 40 41/* Insmod parameters */ 42 43static bool reset; 44module_param(reset, bool, 0); 45MODULE_PARM_DESC(reset, "Set to 1 to reset chip, not recommended"); 46 47#define W83L786NG_REG_IN_MIN(nr) (0x2C + (nr) * 2) 48#define W83L786NG_REG_IN_MAX(nr) (0x2B + (nr) * 2) 49#define W83L786NG_REG_IN(nr) ((nr) + 0x20) 50 51#define W83L786NG_REG_FAN(nr) ((nr) + 0x28) 52#define W83L786NG_REG_FAN_MIN(nr) ((nr) + 0x3B) 53 54#define W83L786NG_REG_CONFIG 0x40 55#define W83L786NG_REG_ALARM1 0x41 56#define W83L786NG_REG_ALARM2 0x42 57#define W83L786NG_REG_GPIO_EN 0x47 58#define W83L786NG_REG_MAN_ID2 0x4C 59#define W83L786NG_REG_MAN_ID1 0x4D 60#define W83L786NG_REG_CHIP_ID 0x4E 61 62#define W83L786NG_REG_DIODE 0x53 63#define W83L786NG_REG_FAN_DIV 0x54 64#define W83L786NG_REG_FAN_CFG 0x80 65 66#define W83L786NG_REG_TOLERANCE 0x8D 67 68static const u8 W83L786NG_REG_TEMP[2][3] = { 69 { 0x25, /* TEMP 0 in DataSheet */ 70 0x35, /* TEMP 0 Over in DataSheet */ 71 0x36 }, /* TEMP 0 Hyst in DataSheet */ 72 { 0x26, /* TEMP 1 in DataSheet */ 73 0x37, /* TEMP 1 Over in DataSheet */ 74 0x38 } /* TEMP 1 Hyst in DataSheet */ 75}; 76 77static const u8 W83L786NG_PWM_MODE_SHIFT[] = {6, 7}; 78static const u8 W83L786NG_PWM_ENABLE_SHIFT[] = {2, 4}; 79 80/* FAN Duty Cycle, be used to control */ 81static const u8 W83L786NG_REG_PWM[] = {0x81, 0x87}; 82 83 84static inline u8 85FAN_TO_REG(long rpm, int div) 86{ 87 if (rpm == 0) 88 return 255; 89 rpm = clamp_val(rpm, 1, 1000000); 90 return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254); 91} 92 93#define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : \ 94 ((val) == 255 ? 0 : \ 95 1350000 / ((val) * (div)))) 96 97/* for temp */ 98#define TEMP_TO_REG(val) (clamp_val(((val) < 0 ? (val) + 0x100 * 1000 \ 99 : (val)) / 1000, 0, 0xff)) 100#define TEMP_FROM_REG(val) (((val) & 0x80 ? \ 101 (val) - 0x100 : (val)) * 1000) 102 103/* 104 * The analog voltage inputs have 8mV LSB. Since the sysfs output is 105 * in mV as would be measured on the chip input pin, need to just 106 * multiply/divide by 8 to translate from/to register values. 107 */ 108#define IN_TO_REG(val) (clamp_val((((val) + 4) / 8), 0, 255)) 109#define IN_FROM_REG(val) ((val) * 8) 110 111#define DIV_FROM_REG(val) (1 << (val)) 112 113static inline u8 114DIV_TO_REG(long val) 115{ 116 int i; 117 val = clamp_val(val, 1, 128) >> 1; 118 for (i = 0; i < 7; i++) { 119 if (val == 0) 120 break; 121 val >>= 1; 122 } 123 return (u8)i; 124} 125 126struct w83l786ng_data { 127 struct device *hwmon_dev; 128 struct mutex update_lock; 129 char valid; /* !=0 if following fields are valid */ 130 unsigned long last_updated; /* In jiffies */ 131 unsigned long last_nonvolatile; /* In jiffies, last time we update the 132 * nonvolatile registers */ 133 134 u8 in[3]; 135 u8 in_max[3]; 136 u8 in_min[3]; 137 u8 fan[2]; 138 u8 fan_div[2]; 139 u8 fan_min[2]; 140 u8 temp_type[2]; 141 u8 temp[2][3]; 142 u8 pwm[2]; 143 u8 pwm_mode[2]; /* 0->DC variable voltage 144 * 1->PWM variable duty cycle */ 145 146 u8 pwm_enable[2]; /* 1->manual 147 * 2->thermal cruise (also called SmartFan I) */ 148 u8 tolerance[2]; 149}; 150 151static int w83l786ng_probe(struct i2c_client *client, 152 const struct i2c_device_id *id); 153static int w83l786ng_detect(struct i2c_client *client, 154 struct i2c_board_info *info); 155static int w83l786ng_remove(struct i2c_client *client); 156static void w83l786ng_init_client(struct i2c_client *client); 157static struct w83l786ng_data *w83l786ng_update_device(struct device *dev); 158 159static const struct i2c_device_id w83l786ng_id[] = { 160 { "w83l786ng", 0 }, 161 { } 162}; 163MODULE_DEVICE_TABLE(i2c, w83l786ng_id); 164 165static struct i2c_driver w83l786ng_driver = { 166 .class = I2C_CLASS_HWMON, 167 .driver = { 168 .name = "w83l786ng", 169 }, 170 .probe = w83l786ng_probe, 171 .remove = w83l786ng_remove, 172 .id_table = w83l786ng_id, 173 .detect = w83l786ng_detect, 174 .address_list = normal_i2c, 175}; 176 177static u8 178w83l786ng_read_value(struct i2c_client *client, u8 reg) 179{ 180 return i2c_smbus_read_byte_data(client, reg); 181} 182 183static int 184w83l786ng_write_value(struct i2c_client *client, u8 reg, u8 value) 185{ 186 return i2c_smbus_write_byte_data(client, reg, value); 187} 188 189/* following are the sysfs callback functions */ 190#define show_in_reg(reg) \ 191static ssize_t \ 192show_##reg(struct device *dev, struct device_attribute *attr, \ 193 char *buf) \ 194{ \ 195 int nr = to_sensor_dev_attr(attr)->index; \ 196 struct w83l786ng_data *data = w83l786ng_update_device(dev); \ 197 return sprintf(buf, "%d\n", IN_FROM_REG(data->reg[nr])); \ 198} 199 200show_in_reg(in) 201show_in_reg(in_min) 202show_in_reg(in_max) 203 204#define store_in_reg(REG, reg) \ 205static ssize_t \ 206store_in_##reg(struct device *dev, struct device_attribute *attr, \ 207 const char *buf, size_t count) \ 208{ \ 209 int nr = to_sensor_dev_attr(attr)->index; \ 210 struct i2c_client *client = to_i2c_client(dev); \ 211 struct w83l786ng_data *data = i2c_get_clientdata(client); \ 212 unsigned long val; \ 213 int err = kstrtoul(buf, 10, &val); \ 214 if (err) \ 215 return err; \ 216 mutex_lock(&data->update_lock); \ 217 data->in_##reg[nr] = IN_TO_REG(val); \ 218 w83l786ng_write_value(client, W83L786NG_REG_IN_##REG(nr), \ 219 data->in_##reg[nr]); \ 220 mutex_unlock(&data->update_lock); \ 221 return count; \ 222} 223 224store_in_reg(MIN, min) 225store_in_reg(MAX, max) 226 227static struct sensor_device_attribute sda_in_input[] = { 228 SENSOR_ATTR(in0_input, S_IRUGO, show_in, NULL, 0), 229 SENSOR_ATTR(in1_input, S_IRUGO, show_in, NULL, 1), 230 SENSOR_ATTR(in2_input, S_IRUGO, show_in, NULL, 2), 231}; 232 233static struct sensor_device_attribute sda_in_min[] = { 234 SENSOR_ATTR(in0_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 0), 235 SENSOR_ATTR(in1_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 1), 236 SENSOR_ATTR(in2_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 2), 237}; 238 239static struct sensor_device_attribute sda_in_max[] = { 240 SENSOR_ATTR(in0_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 0), 241 SENSOR_ATTR(in1_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 1), 242 SENSOR_ATTR(in2_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 2), 243}; 244 245#define show_fan_reg(reg) \ 246static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \ 247 char *buf) \ 248{ \ 249 int nr = to_sensor_dev_attr(attr)->index; \ 250 struct w83l786ng_data *data = w83l786ng_update_device(dev); \ 251 return sprintf(buf, "%d\n", \ 252 FAN_FROM_REG(data->fan[nr], DIV_FROM_REG(data->fan_div[nr]))); \ 253} 254 255show_fan_reg(fan); 256show_fan_reg(fan_min); 257 258static ssize_t 259store_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 w83l786ng_data *data = i2c_get_clientdata(client); 265 unsigned long val; 266 int err; 267 268 err = kstrtoul(buf, 10, &val); 269 if (err) 270 return err; 271 272 mutex_lock(&data->update_lock); 273 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 274 w83l786ng_write_value(client, W83L786NG_REG_FAN_MIN(nr), 275 data->fan_min[nr]); 276 mutex_unlock(&data->update_lock); 277 278 return count; 279} 280 281static ssize_t 282show_fan_div(struct device *dev, struct device_attribute *attr, 283 char *buf) 284{ 285 int nr = to_sensor_dev_attr(attr)->index; 286 struct w83l786ng_data *data = w83l786ng_update_device(dev); 287 return sprintf(buf, "%u\n", DIV_FROM_REG(data->fan_div[nr])); 288} 289 290/* 291 * Note: we save and restore the fan minimum here, because its value is 292 * determined in part by the fan divisor. This follows the principle of 293 * least surprise; the user doesn't expect the fan minimum to change just 294 * because the divisor changed. 295 */ 296static ssize_t 297store_fan_div(struct device *dev, struct device_attribute *attr, 298 const char *buf, size_t count) 299{ 300 int nr = to_sensor_dev_attr(attr)->index; 301 struct i2c_client *client = to_i2c_client(dev); 302 struct w83l786ng_data *data = i2c_get_clientdata(client); 303 304 unsigned long min; 305 u8 tmp_fan_div; 306 u8 fan_div_reg; 307 u8 keep_mask = 0; 308 u8 new_shift = 0; 309 310 unsigned long val; 311 int err; 312 313 err = kstrtoul(buf, 10, &val); 314 if (err) 315 return err; 316 317 /* Save fan_min */ 318 mutex_lock(&data->update_lock); 319 min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])); 320 321 data->fan_div[nr] = DIV_TO_REG(val); 322 323 switch (nr) { 324 case 0: 325 keep_mask = 0xf8; 326 new_shift = 0; 327 break; 328 case 1: 329 keep_mask = 0x8f; 330 new_shift = 4; 331 break; 332 } 333 334 fan_div_reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV) 335 & keep_mask; 336 337 tmp_fan_div = (data->fan_div[nr] << new_shift) & ~keep_mask; 338 339 w83l786ng_write_value(client, W83L786NG_REG_FAN_DIV, 340 fan_div_reg | tmp_fan_div); 341 342 /* Restore fan_min */ 343 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); 344 w83l786ng_write_value(client, W83L786NG_REG_FAN_MIN(nr), 345 data->fan_min[nr]); 346 mutex_unlock(&data->update_lock); 347 348 return count; 349} 350 351static struct sensor_device_attribute sda_fan_input[] = { 352 SENSOR_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0), 353 SENSOR_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1), 354}; 355 356static struct sensor_device_attribute sda_fan_min[] = { 357 SENSOR_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min, 358 store_fan_min, 0), 359 SENSOR_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min, 360 store_fan_min, 1), 361}; 362 363static struct sensor_device_attribute sda_fan_div[] = { 364 SENSOR_ATTR(fan1_div, S_IWUSR | S_IRUGO, show_fan_div, 365 store_fan_div, 0), 366 SENSOR_ATTR(fan2_div, S_IWUSR | S_IRUGO, show_fan_div, 367 store_fan_div, 1), 368}; 369 370 371/* read/write the temperature, includes measured value and limits */ 372 373static ssize_t 374show_temp(struct device *dev, struct device_attribute *attr, char *buf) 375{ 376 struct sensor_device_attribute_2 *sensor_attr = 377 to_sensor_dev_attr_2(attr); 378 int nr = sensor_attr->nr; 379 int index = sensor_attr->index; 380 struct w83l786ng_data *data = w83l786ng_update_device(dev); 381 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr][index])); 382} 383 384static ssize_t 385store_temp(struct device *dev, struct device_attribute *attr, 386 const char *buf, size_t count) 387{ 388 struct sensor_device_attribute_2 *sensor_attr = 389 to_sensor_dev_attr_2(attr); 390 int nr = sensor_attr->nr; 391 int index = sensor_attr->index; 392 struct i2c_client *client = to_i2c_client(dev); 393 struct w83l786ng_data *data = i2c_get_clientdata(client); 394 long val; 395 int err; 396 397 err = kstrtol(buf, 10, &val); 398 if (err) 399 return err; 400 401 mutex_lock(&data->update_lock); 402 data->temp[nr][index] = TEMP_TO_REG(val); 403 w83l786ng_write_value(client, W83L786NG_REG_TEMP[nr][index], 404 data->temp[nr][index]); 405 mutex_unlock(&data->update_lock); 406 407 return count; 408} 409 410static struct sensor_device_attribute_2 sda_temp_input[] = { 411 SENSOR_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 0), 412 SENSOR_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 1, 0), 413}; 414 415static struct sensor_device_attribute_2 sda_temp_max[] = { 416 SENSOR_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, 417 show_temp, store_temp, 0, 1), 418 SENSOR_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, 419 show_temp, store_temp, 1, 1), 420}; 421 422static struct sensor_device_attribute_2 sda_temp_max_hyst[] = { 423 SENSOR_ATTR_2(temp1_max_hyst, S_IRUGO | S_IWUSR, 424 show_temp, store_temp, 0, 2), 425 SENSOR_ATTR_2(temp2_max_hyst, S_IRUGO | S_IWUSR, 426 show_temp, store_temp, 1, 2), 427}; 428 429#define show_pwm_reg(reg) \ 430static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \ 431 char *buf) \ 432{ \ 433 struct w83l786ng_data *data = w83l786ng_update_device(dev); \ 434 int nr = to_sensor_dev_attr(attr)->index; \ 435 return sprintf(buf, "%d\n", data->reg[nr]); \ 436} 437 438show_pwm_reg(pwm_mode) 439show_pwm_reg(pwm_enable) 440show_pwm_reg(pwm) 441 442static ssize_t 443store_pwm_mode(struct device *dev, struct device_attribute *attr, 444 const char *buf, size_t count) 445{ 446 int nr = to_sensor_dev_attr(attr)->index; 447 struct i2c_client *client = to_i2c_client(dev); 448 struct w83l786ng_data *data = i2c_get_clientdata(client); 449 u8 reg; 450 unsigned long val; 451 int err; 452 453 err = kstrtoul(buf, 10, &val); 454 if (err) 455 return err; 456 457 if (val > 1) 458 return -EINVAL; 459 mutex_lock(&data->update_lock); 460 data->pwm_mode[nr] = val; 461 reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG); 462 reg &= ~(1 << W83L786NG_PWM_MODE_SHIFT[nr]); 463 if (!val) 464 reg |= 1 << W83L786NG_PWM_MODE_SHIFT[nr]; 465 w83l786ng_write_value(client, W83L786NG_REG_FAN_CFG, reg); 466 mutex_unlock(&data->update_lock); 467 return count; 468} 469 470static ssize_t 471store_pwm(struct device *dev, struct device_attribute *attr, 472 const char *buf, size_t count) 473{ 474 int nr = to_sensor_dev_attr(attr)->index; 475 struct i2c_client *client = to_i2c_client(dev); 476 struct w83l786ng_data *data = i2c_get_clientdata(client); 477 unsigned long val; 478 int err; 479 480 err = kstrtoul(buf, 10, &val); 481 if (err) 482 return err; 483 val = clamp_val(val, 0, 255); 484 485 mutex_lock(&data->update_lock); 486 data->pwm[nr] = val; 487 w83l786ng_write_value(client, W83L786NG_REG_PWM[nr], val); 488 mutex_unlock(&data->update_lock); 489 return count; 490} 491 492static ssize_t 493store_pwm_enable(struct device *dev, struct device_attribute *attr, 494 const char *buf, size_t count) 495{ 496 int nr = to_sensor_dev_attr(attr)->index; 497 struct i2c_client *client = to_i2c_client(dev); 498 struct w83l786ng_data *data = i2c_get_clientdata(client); 499 u8 reg; 500 unsigned long val; 501 int err; 502 503 err = kstrtoul(buf, 10, &val); 504 if (err) 505 return err; 506 507 if (!val || val > 2) /* only modes 1 and 2 are supported */ 508 return -EINVAL; 509 510 mutex_lock(&data->update_lock); 511 reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG); 512 data->pwm_enable[nr] = val; 513 reg &= ~(0x02 << W83L786NG_PWM_ENABLE_SHIFT[nr]); 514 reg |= (val - 1) << W83L786NG_PWM_ENABLE_SHIFT[nr]; 515 w83l786ng_write_value(client, W83L786NG_REG_FAN_CFG, reg); 516 mutex_unlock(&data->update_lock); 517 return count; 518} 519 520static struct sensor_device_attribute sda_pwm[] = { 521 SENSOR_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 0), 522 SENSOR_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 1), 523}; 524 525static struct sensor_device_attribute sda_pwm_mode[] = { 526 SENSOR_ATTR(pwm1_mode, S_IWUSR | S_IRUGO, show_pwm_mode, 527 store_pwm_mode, 0), 528 SENSOR_ATTR(pwm2_mode, S_IWUSR | S_IRUGO, show_pwm_mode, 529 store_pwm_mode, 1), 530}; 531 532static struct sensor_device_attribute sda_pwm_enable[] = { 533 SENSOR_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_enable, 534 store_pwm_enable, 0), 535 SENSOR_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_enable, 536 store_pwm_enable, 1), 537}; 538 539/* For Smart Fan I/Thermal Cruise and Smart Fan II */ 540static ssize_t 541show_tolerance(struct device *dev, struct device_attribute *attr, char *buf) 542{ 543 int nr = to_sensor_dev_attr(attr)->index; 544 struct w83l786ng_data *data = w83l786ng_update_device(dev); 545 return sprintf(buf, "%ld\n", (long)data->tolerance[nr]); 546} 547 548static ssize_t 549store_tolerance(struct device *dev, struct device_attribute *attr, 550 const char *buf, size_t count) 551{ 552 int nr = to_sensor_dev_attr(attr)->index; 553 struct i2c_client *client = to_i2c_client(dev); 554 struct w83l786ng_data *data = i2c_get_clientdata(client); 555 u8 tol_tmp, tol_mask; 556 unsigned long val; 557 int err; 558 559 err = kstrtoul(buf, 10, &val); 560 if (err) 561 return err; 562 563 mutex_lock(&data->update_lock); 564 tol_mask = w83l786ng_read_value(client, 565 W83L786NG_REG_TOLERANCE) & ((nr == 1) ? 0x0f : 0xf0); 566 tol_tmp = clamp_val(val, 0, 15); 567 tol_tmp &= 0x0f; 568 data->tolerance[nr] = tol_tmp; 569 if (nr == 1) 570 tol_tmp <<= 4; 571 572 w83l786ng_write_value(client, W83L786NG_REG_TOLERANCE, 573 tol_mask | tol_tmp); 574 mutex_unlock(&data->update_lock); 575 return count; 576} 577 578static struct sensor_device_attribute sda_tolerance[] = { 579 SENSOR_ATTR(pwm1_tolerance, S_IWUSR | S_IRUGO, 580 show_tolerance, store_tolerance, 0), 581 SENSOR_ATTR(pwm2_tolerance, S_IWUSR | S_IRUGO, 582 show_tolerance, store_tolerance, 1), 583}; 584 585 586#define IN_UNIT_ATTRS(X) \ 587 &sda_in_input[X].dev_attr.attr, \ 588 &sda_in_min[X].dev_attr.attr, \ 589 &sda_in_max[X].dev_attr.attr 590 591#define FAN_UNIT_ATTRS(X) \ 592 &sda_fan_input[X].dev_attr.attr, \ 593 &sda_fan_min[X].dev_attr.attr, \ 594 &sda_fan_div[X].dev_attr.attr 595 596#define TEMP_UNIT_ATTRS(X) \ 597 &sda_temp_input[X].dev_attr.attr, \ 598 &sda_temp_max[X].dev_attr.attr, \ 599 &sda_temp_max_hyst[X].dev_attr.attr 600 601#define PWM_UNIT_ATTRS(X) \ 602 &sda_pwm[X].dev_attr.attr, \ 603 &sda_pwm_mode[X].dev_attr.attr, \ 604 &sda_pwm_enable[X].dev_attr.attr 605 606#define TOLERANCE_UNIT_ATTRS(X) \ 607 &sda_tolerance[X].dev_attr.attr 608 609static struct attribute *w83l786ng_attributes[] = { 610 IN_UNIT_ATTRS(0), 611 IN_UNIT_ATTRS(1), 612 IN_UNIT_ATTRS(2), 613 FAN_UNIT_ATTRS(0), 614 FAN_UNIT_ATTRS(1), 615 TEMP_UNIT_ATTRS(0), 616 TEMP_UNIT_ATTRS(1), 617 PWM_UNIT_ATTRS(0), 618 PWM_UNIT_ATTRS(1), 619 TOLERANCE_UNIT_ATTRS(0), 620 TOLERANCE_UNIT_ATTRS(1), 621 NULL 622}; 623 624static const struct attribute_group w83l786ng_group = { 625 .attrs = w83l786ng_attributes, 626}; 627 628static int 629w83l786ng_detect(struct i2c_client *client, struct i2c_board_info *info) 630{ 631 struct i2c_adapter *adapter = client->adapter; 632 u16 man_id; 633 u8 chip_id; 634 635 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 636 return -ENODEV; 637 638 /* Detection */ 639 if ((w83l786ng_read_value(client, W83L786NG_REG_CONFIG) & 0x80)) { 640 dev_dbg(&adapter->dev, "W83L786NG detection failed at 0x%02x\n", 641 client->addr); 642 return -ENODEV; 643 } 644 645 /* Identification */ 646 man_id = (w83l786ng_read_value(client, W83L786NG_REG_MAN_ID1) << 8) + 647 w83l786ng_read_value(client, W83L786NG_REG_MAN_ID2); 648 chip_id = w83l786ng_read_value(client, W83L786NG_REG_CHIP_ID); 649 650 if (man_id != 0x5CA3 || /* Winbond */ 651 chip_id != 0x80) { /* W83L786NG */ 652 dev_dbg(&adapter->dev, 653 "Unsupported chip (man_id=0x%04X, chip_id=0x%02X)\n", 654 man_id, chip_id); 655 return -ENODEV; 656 } 657 658 strlcpy(info->type, "w83l786ng", I2C_NAME_SIZE); 659 660 return 0; 661} 662 663static int 664w83l786ng_probe(struct i2c_client *client, const struct i2c_device_id *id) 665{ 666 struct device *dev = &client->dev; 667 struct w83l786ng_data *data; 668 int i, err = 0; 669 u8 reg_tmp; 670 671 data = devm_kzalloc(&client->dev, sizeof(struct w83l786ng_data), 672 GFP_KERNEL); 673 if (!data) 674 return -ENOMEM; 675 676 i2c_set_clientdata(client, data); 677 mutex_init(&data->update_lock); 678 679 /* Initialize the chip */ 680 w83l786ng_init_client(client); 681 682 /* A few vars need to be filled upon startup */ 683 for (i = 0; i < 2; i++) { 684 data->fan_min[i] = w83l786ng_read_value(client, 685 W83L786NG_REG_FAN_MIN(i)); 686 } 687 688 /* Update the fan divisor */ 689 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV); 690 data->fan_div[0] = reg_tmp & 0x07; 691 data->fan_div[1] = (reg_tmp >> 4) & 0x07; 692 693 /* Register sysfs hooks */ 694 err = sysfs_create_group(&client->dev.kobj, &w83l786ng_group); 695 if (err) 696 goto exit_remove; 697 698 data->hwmon_dev = hwmon_device_register(dev); 699 if (IS_ERR(data->hwmon_dev)) { 700 err = PTR_ERR(data->hwmon_dev); 701 goto exit_remove; 702 } 703 704 return 0; 705 706 /* Unregister sysfs hooks */ 707 708exit_remove: 709 sysfs_remove_group(&client->dev.kobj, &w83l786ng_group); 710 return err; 711} 712 713static int 714w83l786ng_remove(struct i2c_client *client) 715{ 716 struct w83l786ng_data *data = i2c_get_clientdata(client); 717 718 hwmon_device_unregister(data->hwmon_dev); 719 sysfs_remove_group(&client->dev.kobj, &w83l786ng_group); 720 721 return 0; 722} 723 724static void 725w83l786ng_init_client(struct i2c_client *client) 726{ 727 u8 tmp; 728 729 if (reset) 730 w83l786ng_write_value(client, W83L786NG_REG_CONFIG, 0x80); 731 732 /* Start monitoring */ 733 tmp = w83l786ng_read_value(client, W83L786NG_REG_CONFIG); 734 if (!(tmp & 0x01)) 735 w83l786ng_write_value(client, W83L786NG_REG_CONFIG, tmp | 0x01); 736} 737 738static struct w83l786ng_data *w83l786ng_update_device(struct device *dev) 739{ 740 struct i2c_client *client = to_i2c_client(dev); 741 struct w83l786ng_data *data = i2c_get_clientdata(client); 742 int i, j; 743 u8 reg_tmp, pwmcfg; 744 745 mutex_lock(&data->update_lock); 746 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 747 || !data->valid) { 748 dev_dbg(&client->dev, "Updating w83l786ng data.\n"); 749 750 /* Update the voltages measured value and limits */ 751 for (i = 0; i < 3; i++) { 752 data->in[i] = w83l786ng_read_value(client, 753 W83L786NG_REG_IN(i)); 754 data->in_min[i] = w83l786ng_read_value(client, 755 W83L786NG_REG_IN_MIN(i)); 756 data->in_max[i] = w83l786ng_read_value(client, 757 W83L786NG_REG_IN_MAX(i)); 758 } 759 760 /* Update the fan counts and limits */ 761 for (i = 0; i < 2; i++) { 762 data->fan[i] = w83l786ng_read_value(client, 763 W83L786NG_REG_FAN(i)); 764 data->fan_min[i] = w83l786ng_read_value(client, 765 W83L786NG_REG_FAN_MIN(i)); 766 } 767 768 /* Update the fan divisor */ 769 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV); 770 data->fan_div[0] = reg_tmp & 0x07; 771 data->fan_div[1] = (reg_tmp >> 4) & 0x07; 772 773 pwmcfg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG); 774 for (i = 0; i < 2; i++) { 775 data->pwm_mode[i] = 776 ((pwmcfg >> W83L786NG_PWM_MODE_SHIFT[i]) & 1) 777 ? 0 : 1; 778 data->pwm_enable[i] = 779 ((pwmcfg >> W83L786NG_PWM_ENABLE_SHIFT[i]) & 2) + 1; 780 data->pwm[i] = w83l786ng_read_value(client, 781 W83L786NG_REG_PWM[i]); 782 } 783 784 785 /* Update the temperature sensors */ 786 for (i = 0; i < 2; i++) { 787 for (j = 0; j < 3; j++) { 788 data->temp[i][j] = w83l786ng_read_value(client, 789 W83L786NG_REG_TEMP[i][j]); 790 } 791 } 792 793 /* Update Smart Fan I/II tolerance */ 794 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_TOLERANCE); 795 data->tolerance[0] = reg_tmp & 0x0f; 796 data->tolerance[1] = (reg_tmp >> 4) & 0x0f; 797 798 data->last_updated = jiffies; 799 data->valid = 1; 800 801 } 802 803 mutex_unlock(&data->update_lock); 804 805 return data; 806} 807 808module_i2c_driver(w83l786ng_driver); 809 810MODULE_AUTHOR("Kevin Lo"); 811MODULE_DESCRIPTION("w83l786ng driver"); 812MODULE_LICENSE("GPL"); 813