1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * w83l786ng.c - Linux kernel driver for hardware monitoring 4 * Copyright (c) 2007 Kevin Lo <kevlo@kevlo.org> 5 */ 6 7 /* 8 * Supports following chips: 9 * 10 * Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA 11 * w83l786ng 3 2 2 2 0x7b 0x5ca3 yes no 12 */ 13 14 #include <linux/module.h> 15 #include <linux/init.h> 16 #include <linux/slab.h> 17 #include <linux/i2c.h> 18 #include <linux/hwmon.h> 19 #include <linux/hwmon-sysfs.h> 20 #include <linux/err.h> 21 #include <linux/mutex.h> 22 #include <linux/jiffies.h> 23 24 /* Addresses to scan */ 25 static const unsigned short normal_i2c[] = { 0x2e, 0x2f, I2C_CLIENT_END }; 26 27 /* Insmod parameters */ 28 29 static bool reset; 30 module_param(reset, bool, 0); 31 MODULE_PARM_DESC(reset, "Set to 1 to reset chip, not recommended"); 32 33 #define W83L786NG_REG_IN_MIN(nr) (0x2C + (nr) * 2) 34 #define W83L786NG_REG_IN_MAX(nr) (0x2B + (nr) * 2) 35 #define W83L786NG_REG_IN(nr) ((nr) + 0x20) 36 37 #define W83L786NG_REG_FAN(nr) ((nr) + 0x28) 38 #define W83L786NG_REG_FAN_MIN(nr) ((nr) + 0x3B) 39 40 #define W83L786NG_REG_CONFIG 0x40 41 #define W83L786NG_REG_ALARM1 0x41 42 #define W83L786NG_REG_ALARM2 0x42 43 #define W83L786NG_REG_GPIO_EN 0x47 44 #define W83L786NG_REG_MAN_ID2 0x4C 45 #define W83L786NG_REG_MAN_ID1 0x4D 46 #define W83L786NG_REG_CHIP_ID 0x4E 47 48 #define W83L786NG_REG_DIODE 0x53 49 #define W83L786NG_REG_FAN_DIV 0x54 50 #define W83L786NG_REG_FAN_CFG 0x80 51 52 #define W83L786NG_REG_TOLERANCE 0x8D 53 54 static const u8 W83L786NG_REG_TEMP[2][3] = { 55 { 0x25, /* TEMP 0 in DataSheet */ 56 0x35, /* TEMP 0 Over in DataSheet */ 57 0x36 }, /* TEMP 0 Hyst in DataSheet */ 58 { 0x26, /* TEMP 1 in DataSheet */ 59 0x37, /* TEMP 1 Over in DataSheet */ 60 0x38 } /* TEMP 1 Hyst in DataSheet */ 61 }; 62 63 static const u8 W83L786NG_PWM_MODE_SHIFT[] = {6, 7}; 64 static const u8 W83L786NG_PWM_ENABLE_SHIFT[] = {2, 4}; 65 66 /* FAN Duty Cycle, be used to control */ 67 static const u8 W83L786NG_REG_PWM[] = {0x81, 0x87}; 68 69 70 static inline u8 71 FAN_TO_REG(long rpm, int div) 72 { 73 if (rpm == 0) 74 return 255; 75 rpm = clamp_val(rpm, 1, 1000000); 76 return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254); 77 } 78 79 #define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : \ 80 ((val) == 255 ? 0 : \ 81 1350000 / ((val) * (div)))) 82 83 /* for temp */ 84 #define TEMP_TO_REG(val) (clamp_val(((val) < 0 ? (val) + 0x100 * 1000 \ 85 : (val)) / 1000, 0, 0xff)) 86 #define TEMP_FROM_REG(val) (((val) & 0x80 ? \ 87 (val) - 0x100 : (val)) * 1000) 88 89 /* 90 * The analog voltage inputs have 8mV LSB. Since the sysfs output is 91 * in mV as would be measured on the chip input pin, need to just 92 * multiply/divide by 8 to translate from/to register values. 93 */ 94 #define IN_TO_REG(val) (clamp_val((((val) + 4) / 8), 0, 255)) 95 #define IN_FROM_REG(val) ((val) * 8) 96 97 #define DIV_FROM_REG(val) (1 << (val)) 98 99 static inline u8 100 DIV_TO_REG(long val) 101 { 102 int i; 103 val = clamp_val(val, 1, 128) >> 1; 104 for (i = 0; i < 7; i++) { 105 if (val == 0) 106 break; 107 val >>= 1; 108 } 109 return (u8)i; 110 } 111 112 struct w83l786ng_data { 113 struct i2c_client *client; 114 struct mutex update_lock; 115 bool valid; /* true if following fields are valid */ 116 unsigned long last_updated; /* In jiffies */ 117 unsigned long last_nonvolatile; /* In jiffies, last time we update the 118 * nonvolatile registers */ 119 120 u8 in[3]; 121 u8 in_max[3]; 122 u8 in_min[3]; 123 u8 fan[2]; 124 u8 fan_div[2]; 125 u8 fan_min[2]; 126 u8 temp_type[2]; 127 u8 temp[2][3]; 128 u8 pwm[2]; 129 u8 pwm_mode[2]; /* 0->DC variable voltage 130 * 1->PWM variable duty cycle */ 131 132 u8 pwm_enable[2]; /* 1->manual 133 * 2->thermal cruise (also called SmartFan I) */ 134 u8 tolerance[2]; 135 }; 136 137 static u8 138 w83l786ng_read_value(struct i2c_client *client, u8 reg) 139 { 140 return i2c_smbus_read_byte_data(client, reg); 141 } 142 143 static int 144 w83l786ng_write_value(struct i2c_client *client, u8 reg, u8 value) 145 { 146 return i2c_smbus_write_byte_data(client, reg, value); 147 } 148 149 static struct w83l786ng_data *w83l786ng_update_device(struct device *dev) 150 { 151 struct w83l786ng_data *data = dev_get_drvdata(dev); 152 struct i2c_client *client = data->client; 153 int i, j; 154 u8 reg_tmp, pwmcfg; 155 156 mutex_lock(&data->update_lock); 157 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 158 || !data->valid) { 159 dev_dbg(&client->dev, "Updating w83l786ng data.\n"); 160 161 /* Update the voltages measured value and limits */ 162 for (i = 0; i < 3; i++) { 163 data->in[i] = w83l786ng_read_value(client, 164 W83L786NG_REG_IN(i)); 165 data->in_min[i] = w83l786ng_read_value(client, 166 W83L786NG_REG_IN_MIN(i)); 167 data->in_max[i] = w83l786ng_read_value(client, 168 W83L786NG_REG_IN_MAX(i)); 169 } 170 171 /* Update the fan counts and limits */ 172 for (i = 0; i < 2; i++) { 173 data->fan[i] = w83l786ng_read_value(client, 174 W83L786NG_REG_FAN(i)); 175 data->fan_min[i] = w83l786ng_read_value(client, 176 W83L786NG_REG_FAN_MIN(i)); 177 } 178 179 /* Update the fan divisor */ 180 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV); 181 data->fan_div[0] = reg_tmp & 0x07; 182 data->fan_div[1] = (reg_tmp >> 4) & 0x07; 183 184 pwmcfg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG); 185 for (i = 0; i < 2; i++) { 186 data->pwm_mode[i] = 187 ((pwmcfg >> W83L786NG_PWM_MODE_SHIFT[i]) & 1) 188 ? 0 : 1; 189 data->pwm_enable[i] = 190 ((pwmcfg >> W83L786NG_PWM_ENABLE_SHIFT[i]) & 3) + 1; 191 data->pwm[i] = 192 (w83l786ng_read_value(client, W83L786NG_REG_PWM[i]) 193 & 0x0f) * 0x11; 194 } 195 196 197 /* Update the temperature sensors */ 198 for (i = 0; i < 2; i++) { 199 for (j = 0; j < 3; j++) { 200 data->temp[i][j] = w83l786ng_read_value(client, 201 W83L786NG_REG_TEMP[i][j]); 202 } 203 } 204 205 /* Update Smart Fan I/II tolerance */ 206 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_TOLERANCE); 207 data->tolerance[0] = reg_tmp & 0x0f; 208 data->tolerance[1] = (reg_tmp >> 4) & 0x0f; 209 210 data->last_updated = jiffies; 211 data->valid = true; 212 213 } 214 215 mutex_unlock(&data->update_lock); 216 217 return data; 218 } 219 220 /* following are the sysfs callback functions */ 221 #define show_in_reg(reg) \ 222 static ssize_t \ 223 show_##reg(struct device *dev, struct device_attribute *attr, \ 224 char *buf) \ 225 { \ 226 int nr = to_sensor_dev_attr(attr)->index; \ 227 struct w83l786ng_data *data = w83l786ng_update_device(dev); \ 228 return sprintf(buf, "%d\n", IN_FROM_REG(data->reg[nr])); \ 229 } 230 231 show_in_reg(in) 232 show_in_reg(in_min) 233 show_in_reg(in_max) 234 235 #define store_in_reg(REG, reg) \ 236 static ssize_t \ 237 store_in_##reg(struct device *dev, struct device_attribute *attr, \ 238 const char *buf, size_t count) \ 239 { \ 240 int nr = to_sensor_dev_attr(attr)->index; \ 241 struct w83l786ng_data *data = dev_get_drvdata(dev); \ 242 struct i2c_client *client = data->client; \ 243 unsigned long val; \ 244 int err = kstrtoul(buf, 10, &val); \ 245 if (err) \ 246 return err; \ 247 mutex_lock(&data->update_lock); \ 248 data->in_##reg[nr] = IN_TO_REG(val); \ 249 w83l786ng_write_value(client, W83L786NG_REG_IN_##REG(nr), \ 250 data->in_##reg[nr]); \ 251 mutex_unlock(&data->update_lock); \ 252 return count; \ 253 } 254 255 store_in_reg(MIN, min) 256 store_in_reg(MAX, max) 257 258 static struct sensor_device_attribute sda_in_input[] = { 259 SENSOR_ATTR(in0_input, S_IRUGO, show_in, NULL, 0), 260 SENSOR_ATTR(in1_input, S_IRUGO, show_in, NULL, 1), 261 SENSOR_ATTR(in2_input, S_IRUGO, show_in, NULL, 2), 262 }; 263 264 static struct sensor_device_attribute sda_in_min[] = { 265 SENSOR_ATTR(in0_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 0), 266 SENSOR_ATTR(in1_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 1), 267 SENSOR_ATTR(in2_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 2), 268 }; 269 270 static struct sensor_device_attribute sda_in_max[] = { 271 SENSOR_ATTR(in0_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 0), 272 SENSOR_ATTR(in1_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 1), 273 SENSOR_ATTR(in2_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 2), 274 }; 275 276 #define show_fan_reg(reg) \ 277 static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \ 278 char *buf) \ 279 { \ 280 int nr = to_sensor_dev_attr(attr)->index; \ 281 struct w83l786ng_data *data = w83l786ng_update_device(dev); \ 282 return sprintf(buf, "%d\n", \ 283 FAN_FROM_REG(data->reg[nr], DIV_FROM_REG(data->fan_div[nr]))); \ 284 } 285 286 show_fan_reg(fan); 287 show_fan_reg(fan_min); 288 289 static ssize_t 290 store_fan_min(struct device *dev, struct device_attribute *attr, 291 const char *buf, size_t count) 292 { 293 int nr = to_sensor_dev_attr(attr)->index; 294 struct w83l786ng_data *data = dev_get_drvdata(dev); 295 struct i2c_client *client = data->client; 296 unsigned long val; 297 int err; 298 299 err = kstrtoul(buf, 10, &val); 300 if (err) 301 return err; 302 303 mutex_lock(&data->update_lock); 304 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 305 w83l786ng_write_value(client, W83L786NG_REG_FAN_MIN(nr), 306 data->fan_min[nr]); 307 mutex_unlock(&data->update_lock); 308 309 return count; 310 } 311 312 static ssize_t 313 show_fan_div(struct device *dev, struct device_attribute *attr, 314 char *buf) 315 { 316 int nr = to_sensor_dev_attr(attr)->index; 317 struct w83l786ng_data *data = w83l786ng_update_device(dev); 318 return sprintf(buf, "%u\n", DIV_FROM_REG(data->fan_div[nr])); 319 } 320 321 /* 322 * Note: we save and restore the fan minimum here, because its value is 323 * determined in part by the fan divisor. This follows the principle of 324 * least surprise; the user doesn't expect the fan minimum to change just 325 * because the divisor changed. 326 */ 327 static ssize_t 328 store_fan_div(struct device *dev, struct device_attribute *attr, 329 const char *buf, size_t count) 330 { 331 int nr = to_sensor_dev_attr(attr)->index; 332 struct w83l786ng_data *data = dev_get_drvdata(dev); 333 struct i2c_client *client = data->client; 334 335 unsigned long min; 336 u8 tmp_fan_div; 337 u8 fan_div_reg; 338 u8 keep_mask = 0; 339 u8 new_shift = 0; 340 341 unsigned long val; 342 int err; 343 344 err = kstrtoul(buf, 10, &val); 345 if (err) 346 return err; 347 348 /* Save fan_min */ 349 mutex_lock(&data->update_lock); 350 min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])); 351 352 data->fan_div[nr] = DIV_TO_REG(val); 353 354 switch (nr) { 355 case 0: 356 keep_mask = 0xf8; 357 new_shift = 0; 358 break; 359 case 1: 360 keep_mask = 0x8f; 361 new_shift = 4; 362 break; 363 } 364 365 fan_div_reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV) 366 & keep_mask; 367 368 tmp_fan_div = (data->fan_div[nr] << new_shift) & ~keep_mask; 369 370 w83l786ng_write_value(client, W83L786NG_REG_FAN_DIV, 371 fan_div_reg | tmp_fan_div); 372 373 /* Restore fan_min */ 374 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); 375 w83l786ng_write_value(client, W83L786NG_REG_FAN_MIN(nr), 376 data->fan_min[nr]); 377 mutex_unlock(&data->update_lock); 378 379 return count; 380 } 381 382 static struct sensor_device_attribute sda_fan_input[] = { 383 SENSOR_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0), 384 SENSOR_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1), 385 }; 386 387 static struct sensor_device_attribute sda_fan_min[] = { 388 SENSOR_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min, 389 store_fan_min, 0), 390 SENSOR_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min, 391 store_fan_min, 1), 392 }; 393 394 static struct sensor_device_attribute sda_fan_div[] = { 395 SENSOR_ATTR(fan1_div, S_IWUSR | S_IRUGO, show_fan_div, 396 store_fan_div, 0), 397 SENSOR_ATTR(fan2_div, S_IWUSR | S_IRUGO, show_fan_div, 398 store_fan_div, 1), 399 }; 400 401 402 /* read/write the temperature, includes measured value and limits */ 403 404 static ssize_t 405 show_temp(struct device *dev, struct device_attribute *attr, char *buf) 406 { 407 struct sensor_device_attribute_2 *sensor_attr = 408 to_sensor_dev_attr_2(attr); 409 int nr = sensor_attr->nr; 410 int index = sensor_attr->index; 411 struct w83l786ng_data *data = w83l786ng_update_device(dev); 412 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr][index])); 413 } 414 415 static ssize_t 416 store_temp(struct device *dev, struct device_attribute *attr, 417 const char *buf, size_t count) 418 { 419 struct sensor_device_attribute_2 *sensor_attr = 420 to_sensor_dev_attr_2(attr); 421 int nr = sensor_attr->nr; 422 int index = sensor_attr->index; 423 struct w83l786ng_data *data = dev_get_drvdata(dev); 424 struct i2c_client *client = data->client; 425 long val; 426 int err; 427 428 err = kstrtol(buf, 10, &val); 429 if (err) 430 return err; 431 432 mutex_lock(&data->update_lock); 433 data->temp[nr][index] = TEMP_TO_REG(val); 434 w83l786ng_write_value(client, W83L786NG_REG_TEMP[nr][index], 435 data->temp[nr][index]); 436 mutex_unlock(&data->update_lock); 437 438 return count; 439 } 440 441 static struct sensor_device_attribute_2 sda_temp_input[] = { 442 SENSOR_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 0), 443 SENSOR_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 1, 0), 444 }; 445 446 static struct sensor_device_attribute_2 sda_temp_max[] = { 447 SENSOR_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, 448 show_temp, store_temp, 0, 1), 449 SENSOR_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, 450 show_temp, store_temp, 1, 1), 451 }; 452 453 static struct sensor_device_attribute_2 sda_temp_max_hyst[] = { 454 SENSOR_ATTR_2(temp1_max_hyst, S_IRUGO | S_IWUSR, 455 show_temp, store_temp, 0, 2), 456 SENSOR_ATTR_2(temp2_max_hyst, S_IRUGO | S_IWUSR, 457 show_temp, store_temp, 1, 2), 458 }; 459 460 #define show_pwm_reg(reg) \ 461 static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \ 462 char *buf) \ 463 { \ 464 struct w83l786ng_data *data = w83l786ng_update_device(dev); \ 465 int nr = to_sensor_dev_attr(attr)->index; \ 466 return sprintf(buf, "%d\n", data->reg[nr]); \ 467 } 468 469 show_pwm_reg(pwm_mode) 470 show_pwm_reg(pwm_enable) 471 show_pwm_reg(pwm) 472 473 static ssize_t 474 store_pwm_mode(struct device *dev, struct device_attribute *attr, 475 const char *buf, size_t count) 476 { 477 int nr = to_sensor_dev_attr(attr)->index; 478 struct w83l786ng_data *data = dev_get_drvdata(dev); 479 struct i2c_client *client = data->client; 480 u8 reg; 481 unsigned long val; 482 int err; 483 484 err = kstrtoul(buf, 10, &val); 485 if (err) 486 return err; 487 488 if (val > 1) 489 return -EINVAL; 490 mutex_lock(&data->update_lock); 491 data->pwm_mode[nr] = val; 492 reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG); 493 reg &= ~(1 << W83L786NG_PWM_MODE_SHIFT[nr]); 494 if (!val) 495 reg |= 1 << W83L786NG_PWM_MODE_SHIFT[nr]; 496 w83l786ng_write_value(client, W83L786NG_REG_FAN_CFG, reg); 497 mutex_unlock(&data->update_lock); 498 return count; 499 } 500 501 static ssize_t 502 store_pwm(struct device *dev, struct device_attribute *attr, 503 const char *buf, size_t count) 504 { 505 int nr = to_sensor_dev_attr(attr)->index; 506 struct w83l786ng_data *data = dev_get_drvdata(dev); 507 struct i2c_client *client = data->client; 508 unsigned long val; 509 int err; 510 511 err = kstrtoul(buf, 10, &val); 512 if (err) 513 return err; 514 val = clamp_val(val, 0, 255); 515 val = DIV_ROUND_CLOSEST(val, 0x11); 516 517 mutex_lock(&data->update_lock); 518 data->pwm[nr] = val * 0x11; 519 val |= w83l786ng_read_value(client, W83L786NG_REG_PWM[nr]) & 0xf0; 520 w83l786ng_write_value(client, W83L786NG_REG_PWM[nr], val); 521 mutex_unlock(&data->update_lock); 522 return count; 523 } 524 525 static ssize_t 526 store_pwm_enable(struct device *dev, struct device_attribute *attr, 527 const char *buf, size_t count) 528 { 529 int nr = to_sensor_dev_attr(attr)->index; 530 struct w83l786ng_data *data = dev_get_drvdata(dev); 531 struct i2c_client *client = data->client; 532 u8 reg; 533 unsigned long val; 534 int err; 535 536 err = kstrtoul(buf, 10, &val); 537 if (err) 538 return err; 539 540 if (!val || val > 2) /* only modes 1 and 2 are supported */ 541 return -EINVAL; 542 543 mutex_lock(&data->update_lock); 544 reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG); 545 data->pwm_enable[nr] = val; 546 reg &= ~(0x03 << W83L786NG_PWM_ENABLE_SHIFT[nr]); 547 reg |= (val - 1) << W83L786NG_PWM_ENABLE_SHIFT[nr]; 548 w83l786ng_write_value(client, W83L786NG_REG_FAN_CFG, reg); 549 mutex_unlock(&data->update_lock); 550 return count; 551 } 552 553 static struct sensor_device_attribute sda_pwm[] = { 554 SENSOR_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 0), 555 SENSOR_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 1), 556 }; 557 558 static struct sensor_device_attribute sda_pwm_mode[] = { 559 SENSOR_ATTR(pwm1_mode, S_IWUSR | S_IRUGO, show_pwm_mode, 560 store_pwm_mode, 0), 561 SENSOR_ATTR(pwm2_mode, S_IWUSR | S_IRUGO, show_pwm_mode, 562 store_pwm_mode, 1), 563 }; 564 565 static struct sensor_device_attribute sda_pwm_enable[] = { 566 SENSOR_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_enable, 567 store_pwm_enable, 0), 568 SENSOR_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_enable, 569 store_pwm_enable, 1), 570 }; 571 572 /* For Smart Fan I/Thermal Cruise and Smart Fan II */ 573 static ssize_t 574 show_tolerance(struct device *dev, struct device_attribute *attr, char *buf) 575 { 576 int nr = to_sensor_dev_attr(attr)->index; 577 struct w83l786ng_data *data = w83l786ng_update_device(dev); 578 return sprintf(buf, "%ld\n", (long)data->tolerance[nr]); 579 } 580 581 static ssize_t 582 store_tolerance(struct device *dev, struct device_attribute *attr, 583 const char *buf, size_t count) 584 { 585 int nr = to_sensor_dev_attr(attr)->index; 586 struct w83l786ng_data *data = dev_get_drvdata(dev); 587 struct i2c_client *client = data->client; 588 u8 tol_tmp, tol_mask; 589 unsigned long val; 590 int err; 591 592 err = kstrtoul(buf, 10, &val); 593 if (err) 594 return err; 595 596 mutex_lock(&data->update_lock); 597 tol_mask = w83l786ng_read_value(client, 598 W83L786NG_REG_TOLERANCE) & ((nr == 1) ? 0x0f : 0xf0); 599 tol_tmp = clamp_val(val, 0, 15); 600 tol_tmp &= 0x0f; 601 data->tolerance[nr] = tol_tmp; 602 if (nr == 1) 603 tol_tmp <<= 4; 604 605 w83l786ng_write_value(client, W83L786NG_REG_TOLERANCE, 606 tol_mask | tol_tmp); 607 mutex_unlock(&data->update_lock); 608 return count; 609 } 610 611 static struct sensor_device_attribute sda_tolerance[] = { 612 SENSOR_ATTR(pwm1_tolerance, S_IWUSR | S_IRUGO, 613 show_tolerance, store_tolerance, 0), 614 SENSOR_ATTR(pwm2_tolerance, S_IWUSR | S_IRUGO, 615 show_tolerance, store_tolerance, 1), 616 }; 617 618 619 #define IN_UNIT_ATTRS(X) \ 620 &sda_in_input[X].dev_attr.attr, \ 621 &sda_in_min[X].dev_attr.attr, \ 622 &sda_in_max[X].dev_attr.attr 623 624 #define FAN_UNIT_ATTRS(X) \ 625 &sda_fan_input[X].dev_attr.attr, \ 626 &sda_fan_min[X].dev_attr.attr, \ 627 &sda_fan_div[X].dev_attr.attr 628 629 #define TEMP_UNIT_ATTRS(X) \ 630 &sda_temp_input[X].dev_attr.attr, \ 631 &sda_temp_max[X].dev_attr.attr, \ 632 &sda_temp_max_hyst[X].dev_attr.attr 633 634 #define PWM_UNIT_ATTRS(X) \ 635 &sda_pwm[X].dev_attr.attr, \ 636 &sda_pwm_mode[X].dev_attr.attr, \ 637 &sda_pwm_enable[X].dev_attr.attr 638 639 #define TOLERANCE_UNIT_ATTRS(X) \ 640 &sda_tolerance[X].dev_attr.attr 641 642 static struct attribute *w83l786ng_attrs[] = { 643 IN_UNIT_ATTRS(0), 644 IN_UNIT_ATTRS(1), 645 IN_UNIT_ATTRS(2), 646 FAN_UNIT_ATTRS(0), 647 FAN_UNIT_ATTRS(1), 648 TEMP_UNIT_ATTRS(0), 649 TEMP_UNIT_ATTRS(1), 650 PWM_UNIT_ATTRS(0), 651 PWM_UNIT_ATTRS(1), 652 TOLERANCE_UNIT_ATTRS(0), 653 TOLERANCE_UNIT_ATTRS(1), 654 NULL 655 }; 656 657 ATTRIBUTE_GROUPS(w83l786ng); 658 659 static int 660 w83l786ng_detect(struct i2c_client *client, struct i2c_board_info *info) 661 { 662 struct i2c_adapter *adapter = client->adapter; 663 u16 man_id; 664 u8 chip_id; 665 666 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 667 return -ENODEV; 668 669 /* Detection */ 670 if ((w83l786ng_read_value(client, W83L786NG_REG_CONFIG) & 0x80)) { 671 dev_dbg(&adapter->dev, "W83L786NG detection failed at 0x%02x\n", 672 client->addr); 673 return -ENODEV; 674 } 675 676 /* Identification */ 677 man_id = (w83l786ng_read_value(client, W83L786NG_REG_MAN_ID1) << 8) + 678 w83l786ng_read_value(client, W83L786NG_REG_MAN_ID2); 679 chip_id = w83l786ng_read_value(client, W83L786NG_REG_CHIP_ID); 680 681 if (man_id != 0x5CA3 || /* Winbond */ 682 chip_id != 0x80) { /* W83L786NG */ 683 dev_dbg(&adapter->dev, 684 "Unsupported chip (man_id=0x%04X, chip_id=0x%02X)\n", 685 man_id, chip_id); 686 return -ENODEV; 687 } 688 689 strscpy(info->type, "w83l786ng", I2C_NAME_SIZE); 690 691 return 0; 692 } 693 694 static void w83l786ng_init_client(struct i2c_client *client) 695 { 696 u8 tmp; 697 698 if (reset) 699 w83l786ng_write_value(client, W83L786NG_REG_CONFIG, 0x80); 700 701 /* Start monitoring */ 702 tmp = w83l786ng_read_value(client, W83L786NG_REG_CONFIG); 703 if (!(tmp & 0x01)) 704 w83l786ng_write_value(client, W83L786NG_REG_CONFIG, tmp | 0x01); 705 } 706 707 static int 708 w83l786ng_probe(struct i2c_client *client) 709 { 710 struct device *dev = &client->dev; 711 struct w83l786ng_data *data; 712 struct device *hwmon_dev; 713 int i; 714 u8 reg_tmp; 715 716 data = devm_kzalloc(dev, sizeof(struct w83l786ng_data), GFP_KERNEL); 717 if (!data) 718 return -ENOMEM; 719 720 data->client = client; 721 mutex_init(&data->update_lock); 722 723 /* Initialize the chip */ 724 w83l786ng_init_client(client); 725 726 /* A few vars need to be filled upon startup */ 727 for (i = 0; i < 2; i++) { 728 data->fan_min[i] = w83l786ng_read_value(client, 729 W83L786NG_REG_FAN_MIN(i)); 730 } 731 732 /* Update the fan divisor */ 733 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV); 734 data->fan_div[0] = reg_tmp & 0x07; 735 data->fan_div[1] = (reg_tmp >> 4) & 0x07; 736 737 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, 738 data, 739 w83l786ng_groups); 740 return PTR_ERR_OR_ZERO(hwmon_dev); 741 } 742 743 static const struct i2c_device_id w83l786ng_id[] = { 744 { "w83l786ng", 0 }, 745 { } 746 }; 747 MODULE_DEVICE_TABLE(i2c, w83l786ng_id); 748 749 static struct i2c_driver w83l786ng_driver = { 750 .class = I2C_CLASS_HWMON, 751 .driver = { 752 .name = "w83l786ng", 753 }, 754 .probe_new = w83l786ng_probe, 755 .id_table = w83l786ng_id, 756 .detect = w83l786ng_detect, 757 .address_list = normal_i2c, 758 }; 759 760 module_i2c_driver(w83l786ng_driver); 761 762 MODULE_AUTHOR("Kevin Lo"); 763 MODULE_DESCRIPTION("w83l786ng driver"); 764 MODULE_LICENSE("GPL"); 765