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-vid.h> 20 #include <linux/hwmon-sysfs.h> 21 #include <linux/err.h> 22 #include <linux/mutex.h> 23 #include <linux/jiffies.h> 24 25 /* Addresses to scan */ 26 static const unsigned short normal_i2c[] = { 0x2e, 0x2f, I2C_CLIENT_END }; 27 28 /* Insmod parameters */ 29 30 static bool reset; 31 module_param(reset, bool, 0); 32 MODULE_PARM_DESC(reset, "Set to 1 to reset chip, not recommended"); 33 34 #define W83L786NG_REG_IN_MIN(nr) (0x2C + (nr) * 2) 35 #define W83L786NG_REG_IN_MAX(nr) (0x2B + (nr) * 2) 36 #define W83L786NG_REG_IN(nr) ((nr) + 0x20) 37 38 #define W83L786NG_REG_FAN(nr) ((nr) + 0x28) 39 #define W83L786NG_REG_FAN_MIN(nr) ((nr) + 0x3B) 40 41 #define W83L786NG_REG_CONFIG 0x40 42 #define W83L786NG_REG_ALARM1 0x41 43 #define W83L786NG_REG_ALARM2 0x42 44 #define W83L786NG_REG_GPIO_EN 0x47 45 #define W83L786NG_REG_MAN_ID2 0x4C 46 #define W83L786NG_REG_MAN_ID1 0x4D 47 #define W83L786NG_REG_CHIP_ID 0x4E 48 49 #define W83L786NG_REG_DIODE 0x53 50 #define W83L786NG_REG_FAN_DIV 0x54 51 #define W83L786NG_REG_FAN_CFG 0x80 52 53 #define W83L786NG_REG_TOLERANCE 0x8D 54 55 static const u8 W83L786NG_REG_TEMP[2][3] = { 56 { 0x25, /* TEMP 0 in DataSheet */ 57 0x35, /* TEMP 0 Over in DataSheet */ 58 0x36 }, /* TEMP 0 Hyst in DataSheet */ 59 { 0x26, /* TEMP 1 in DataSheet */ 60 0x37, /* TEMP 1 Over in DataSheet */ 61 0x38 } /* TEMP 1 Hyst in DataSheet */ 62 }; 63 64 static const u8 W83L786NG_PWM_MODE_SHIFT[] = {6, 7}; 65 static const u8 W83L786NG_PWM_ENABLE_SHIFT[] = {2, 4}; 66 67 /* FAN Duty Cycle, be used to control */ 68 static const u8 W83L786NG_REG_PWM[] = {0x81, 0x87}; 69 70 71 static inline u8 72 FAN_TO_REG(long rpm, int div) 73 { 74 if (rpm == 0) 75 return 255; 76 rpm = clamp_val(rpm, 1, 1000000); 77 return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254); 78 } 79 80 #define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : \ 81 ((val) == 255 ? 0 : \ 82 1350000 / ((val) * (div)))) 83 84 /* for temp */ 85 #define TEMP_TO_REG(val) (clamp_val(((val) < 0 ? (val) + 0x100 * 1000 \ 86 : (val)) / 1000, 0, 0xff)) 87 #define TEMP_FROM_REG(val) (((val) & 0x80 ? \ 88 (val) - 0x100 : (val)) * 1000) 89 90 /* 91 * The analog voltage inputs have 8mV LSB. Since the sysfs output is 92 * in mV as would be measured on the chip input pin, need to just 93 * multiply/divide by 8 to translate from/to register values. 94 */ 95 #define IN_TO_REG(val) (clamp_val((((val) + 4) / 8), 0, 255)) 96 #define IN_FROM_REG(val) ((val) * 8) 97 98 #define DIV_FROM_REG(val) (1 << (val)) 99 100 static inline u8 101 DIV_TO_REG(long val) 102 { 103 int i; 104 val = clamp_val(val, 1, 128) >> 1; 105 for (i = 0; i < 7; i++) { 106 if (val == 0) 107 break; 108 val >>= 1; 109 } 110 return (u8)i; 111 } 112 113 struct w83l786ng_data { 114 struct i2c_client *client; 115 struct mutex update_lock; 116 bool valid; /* true if following fields are valid */ 117 unsigned long last_updated; /* In jiffies */ 118 unsigned long last_nonvolatile; /* In jiffies, last time we update the 119 * nonvolatile registers */ 120 121 u8 in[3]; 122 u8 in_max[3]; 123 u8 in_min[3]; 124 u8 fan[2]; 125 u8 fan_div[2]; 126 u8 fan_min[2]; 127 u8 temp_type[2]; 128 u8 temp[2][3]; 129 u8 pwm[2]; 130 u8 pwm_mode[2]; /* 0->DC variable voltage 131 * 1->PWM variable duty cycle */ 132 133 u8 pwm_enable[2]; /* 1->manual 134 * 2->thermal cruise (also called SmartFan I) */ 135 u8 tolerance[2]; 136 }; 137 138 static u8 139 w83l786ng_read_value(struct i2c_client *client, u8 reg) 140 { 141 return i2c_smbus_read_byte_data(client, reg); 142 } 143 144 static int 145 w83l786ng_write_value(struct i2c_client *client, u8 reg, u8 value) 146 { 147 return i2c_smbus_write_byte_data(client, reg, value); 148 } 149 150 static struct w83l786ng_data *w83l786ng_update_device(struct device *dev) 151 { 152 struct w83l786ng_data *data = dev_get_drvdata(dev); 153 struct i2c_client *client = data->client; 154 int i, j; 155 u8 reg_tmp, pwmcfg; 156 157 mutex_lock(&data->update_lock); 158 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) 159 || !data->valid) { 160 dev_dbg(&client->dev, "Updating w83l786ng data.\n"); 161 162 /* Update the voltages measured value and limits */ 163 for (i = 0; i < 3; i++) { 164 data->in[i] = w83l786ng_read_value(client, 165 W83L786NG_REG_IN(i)); 166 data->in_min[i] = w83l786ng_read_value(client, 167 W83L786NG_REG_IN_MIN(i)); 168 data->in_max[i] = w83l786ng_read_value(client, 169 W83L786NG_REG_IN_MAX(i)); 170 } 171 172 /* Update the fan counts and limits */ 173 for (i = 0; i < 2; i++) { 174 data->fan[i] = w83l786ng_read_value(client, 175 W83L786NG_REG_FAN(i)); 176 data->fan_min[i] = w83l786ng_read_value(client, 177 W83L786NG_REG_FAN_MIN(i)); 178 } 179 180 /* Update the fan divisor */ 181 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV); 182 data->fan_div[0] = reg_tmp & 0x07; 183 data->fan_div[1] = (reg_tmp >> 4) & 0x07; 184 185 pwmcfg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG); 186 for (i = 0; i < 2; i++) { 187 data->pwm_mode[i] = 188 ((pwmcfg >> W83L786NG_PWM_MODE_SHIFT[i]) & 1) 189 ? 0 : 1; 190 data->pwm_enable[i] = 191 ((pwmcfg >> W83L786NG_PWM_ENABLE_SHIFT[i]) & 3) + 1; 192 data->pwm[i] = 193 (w83l786ng_read_value(client, W83L786NG_REG_PWM[i]) 194 & 0x0f) * 0x11; 195 } 196 197 198 /* Update the temperature sensors */ 199 for (i = 0; i < 2; i++) { 200 for (j = 0; j < 3; j++) { 201 data->temp[i][j] = w83l786ng_read_value(client, 202 W83L786NG_REG_TEMP[i][j]); 203 } 204 } 205 206 /* Update Smart Fan I/II tolerance */ 207 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_TOLERANCE); 208 data->tolerance[0] = reg_tmp & 0x0f; 209 data->tolerance[1] = (reg_tmp >> 4) & 0x0f; 210 211 data->last_updated = jiffies; 212 data->valid = true; 213 214 } 215 216 mutex_unlock(&data->update_lock); 217 218 return data; 219 } 220 221 /* following are the sysfs callback functions */ 222 #define show_in_reg(reg) \ 223 static ssize_t \ 224 show_##reg(struct device *dev, struct device_attribute *attr, \ 225 char *buf) \ 226 { \ 227 int nr = to_sensor_dev_attr(attr)->index; \ 228 struct w83l786ng_data *data = w83l786ng_update_device(dev); \ 229 return sprintf(buf, "%d\n", IN_FROM_REG(data->reg[nr])); \ 230 } 231 232 show_in_reg(in) 233 show_in_reg(in_min) 234 show_in_reg(in_max) 235 236 #define store_in_reg(REG, reg) \ 237 static ssize_t \ 238 store_in_##reg(struct device *dev, struct device_attribute *attr, \ 239 const char *buf, size_t count) \ 240 { \ 241 int nr = to_sensor_dev_attr(attr)->index; \ 242 struct w83l786ng_data *data = dev_get_drvdata(dev); \ 243 struct i2c_client *client = data->client; \ 244 unsigned long val; \ 245 int err = kstrtoul(buf, 10, &val); \ 246 if (err) \ 247 return err; \ 248 mutex_lock(&data->update_lock); \ 249 data->in_##reg[nr] = IN_TO_REG(val); \ 250 w83l786ng_write_value(client, W83L786NG_REG_IN_##REG(nr), \ 251 data->in_##reg[nr]); \ 252 mutex_unlock(&data->update_lock); \ 253 return count; \ 254 } 255 256 store_in_reg(MIN, min) 257 store_in_reg(MAX, max) 258 259 static struct sensor_device_attribute sda_in_input[] = { 260 SENSOR_ATTR(in0_input, S_IRUGO, show_in, NULL, 0), 261 SENSOR_ATTR(in1_input, S_IRUGO, show_in, NULL, 1), 262 SENSOR_ATTR(in2_input, S_IRUGO, show_in, NULL, 2), 263 }; 264 265 static struct sensor_device_attribute sda_in_min[] = { 266 SENSOR_ATTR(in0_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 0), 267 SENSOR_ATTR(in1_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 1), 268 SENSOR_ATTR(in2_min, S_IWUSR | S_IRUGO, show_in_min, store_in_min, 2), 269 }; 270 271 static struct sensor_device_attribute sda_in_max[] = { 272 SENSOR_ATTR(in0_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 0), 273 SENSOR_ATTR(in1_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 1), 274 SENSOR_ATTR(in2_max, S_IWUSR | S_IRUGO, show_in_max, store_in_max, 2), 275 }; 276 277 #define show_fan_reg(reg) \ 278 static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \ 279 char *buf) \ 280 { \ 281 int nr = to_sensor_dev_attr(attr)->index; \ 282 struct w83l786ng_data *data = w83l786ng_update_device(dev); \ 283 return sprintf(buf, "%d\n", \ 284 FAN_FROM_REG(data->reg[nr], DIV_FROM_REG(data->fan_div[nr]))); \ 285 } 286 287 show_fan_reg(fan); 288 show_fan_reg(fan_min); 289 290 static ssize_t 291 store_fan_min(struct device *dev, struct device_attribute *attr, 292 const char *buf, size_t count) 293 { 294 int nr = to_sensor_dev_attr(attr)->index; 295 struct w83l786ng_data *data = dev_get_drvdata(dev); 296 struct i2c_client *client = data->client; 297 unsigned long val; 298 int err; 299 300 err = kstrtoul(buf, 10, &val); 301 if (err) 302 return err; 303 304 mutex_lock(&data->update_lock); 305 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); 306 w83l786ng_write_value(client, W83L786NG_REG_FAN_MIN(nr), 307 data->fan_min[nr]); 308 mutex_unlock(&data->update_lock); 309 310 return count; 311 } 312 313 static ssize_t 314 show_fan_div(struct device *dev, struct device_attribute *attr, 315 char *buf) 316 { 317 int nr = to_sensor_dev_attr(attr)->index; 318 struct w83l786ng_data *data = w83l786ng_update_device(dev); 319 return sprintf(buf, "%u\n", DIV_FROM_REG(data->fan_div[nr])); 320 } 321 322 /* 323 * Note: we save and restore the fan minimum here, because its value is 324 * determined in part by the fan divisor. This follows the principle of 325 * least surprise; the user doesn't expect the fan minimum to change just 326 * because the divisor changed. 327 */ 328 static ssize_t 329 store_fan_div(struct device *dev, struct device_attribute *attr, 330 const char *buf, size_t count) 331 { 332 int nr = to_sensor_dev_attr(attr)->index; 333 struct w83l786ng_data *data = dev_get_drvdata(dev); 334 struct i2c_client *client = data->client; 335 336 unsigned long min; 337 u8 tmp_fan_div; 338 u8 fan_div_reg; 339 u8 keep_mask = 0; 340 u8 new_shift = 0; 341 342 unsigned long val; 343 int err; 344 345 err = kstrtoul(buf, 10, &val); 346 if (err) 347 return err; 348 349 /* Save fan_min */ 350 mutex_lock(&data->update_lock); 351 min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])); 352 353 data->fan_div[nr] = DIV_TO_REG(val); 354 355 switch (nr) { 356 case 0: 357 keep_mask = 0xf8; 358 new_shift = 0; 359 break; 360 case 1: 361 keep_mask = 0x8f; 362 new_shift = 4; 363 break; 364 } 365 366 fan_div_reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV) 367 & keep_mask; 368 369 tmp_fan_div = (data->fan_div[nr] << new_shift) & ~keep_mask; 370 371 w83l786ng_write_value(client, W83L786NG_REG_FAN_DIV, 372 fan_div_reg | tmp_fan_div); 373 374 /* Restore fan_min */ 375 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); 376 w83l786ng_write_value(client, W83L786NG_REG_FAN_MIN(nr), 377 data->fan_min[nr]); 378 mutex_unlock(&data->update_lock); 379 380 return count; 381 } 382 383 static struct sensor_device_attribute sda_fan_input[] = { 384 SENSOR_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0), 385 SENSOR_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1), 386 }; 387 388 static struct sensor_device_attribute sda_fan_min[] = { 389 SENSOR_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min, 390 store_fan_min, 0), 391 SENSOR_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min, 392 store_fan_min, 1), 393 }; 394 395 static struct sensor_device_attribute sda_fan_div[] = { 396 SENSOR_ATTR(fan1_div, S_IWUSR | S_IRUGO, show_fan_div, 397 store_fan_div, 0), 398 SENSOR_ATTR(fan2_div, S_IWUSR | S_IRUGO, show_fan_div, 399 store_fan_div, 1), 400 }; 401 402 403 /* read/write the temperature, includes measured value and limits */ 404 405 static ssize_t 406 show_temp(struct device *dev, struct device_attribute *attr, char *buf) 407 { 408 struct sensor_device_attribute_2 *sensor_attr = 409 to_sensor_dev_attr_2(attr); 410 int nr = sensor_attr->nr; 411 int index = sensor_attr->index; 412 struct w83l786ng_data *data = w83l786ng_update_device(dev); 413 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr][index])); 414 } 415 416 static ssize_t 417 store_temp(struct device *dev, struct device_attribute *attr, 418 const char *buf, size_t count) 419 { 420 struct sensor_device_attribute_2 *sensor_attr = 421 to_sensor_dev_attr_2(attr); 422 int nr = sensor_attr->nr; 423 int index = sensor_attr->index; 424 struct w83l786ng_data *data = dev_get_drvdata(dev); 425 struct i2c_client *client = data->client; 426 long val; 427 int err; 428 429 err = kstrtol(buf, 10, &val); 430 if (err) 431 return err; 432 433 mutex_lock(&data->update_lock); 434 data->temp[nr][index] = TEMP_TO_REG(val); 435 w83l786ng_write_value(client, W83L786NG_REG_TEMP[nr][index], 436 data->temp[nr][index]); 437 mutex_unlock(&data->update_lock); 438 439 return count; 440 } 441 442 static struct sensor_device_attribute_2 sda_temp_input[] = { 443 SENSOR_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 0), 444 SENSOR_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 1, 0), 445 }; 446 447 static struct sensor_device_attribute_2 sda_temp_max[] = { 448 SENSOR_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, 449 show_temp, store_temp, 0, 1), 450 SENSOR_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, 451 show_temp, store_temp, 1, 1), 452 }; 453 454 static struct sensor_device_attribute_2 sda_temp_max_hyst[] = { 455 SENSOR_ATTR_2(temp1_max_hyst, S_IRUGO | S_IWUSR, 456 show_temp, store_temp, 0, 2), 457 SENSOR_ATTR_2(temp2_max_hyst, S_IRUGO | S_IWUSR, 458 show_temp, store_temp, 1, 2), 459 }; 460 461 #define show_pwm_reg(reg) \ 462 static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \ 463 char *buf) \ 464 { \ 465 struct w83l786ng_data *data = w83l786ng_update_device(dev); \ 466 int nr = to_sensor_dev_attr(attr)->index; \ 467 return sprintf(buf, "%d\n", data->reg[nr]); \ 468 } 469 470 show_pwm_reg(pwm_mode) 471 show_pwm_reg(pwm_enable) 472 show_pwm_reg(pwm) 473 474 static ssize_t 475 store_pwm_mode(struct device *dev, struct device_attribute *attr, 476 const char *buf, size_t count) 477 { 478 int nr = to_sensor_dev_attr(attr)->index; 479 struct w83l786ng_data *data = dev_get_drvdata(dev); 480 struct i2c_client *client = data->client; 481 u8 reg; 482 unsigned long val; 483 int err; 484 485 err = kstrtoul(buf, 10, &val); 486 if (err) 487 return err; 488 489 if (val > 1) 490 return -EINVAL; 491 mutex_lock(&data->update_lock); 492 data->pwm_mode[nr] = val; 493 reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG); 494 reg &= ~(1 << W83L786NG_PWM_MODE_SHIFT[nr]); 495 if (!val) 496 reg |= 1 << W83L786NG_PWM_MODE_SHIFT[nr]; 497 w83l786ng_write_value(client, W83L786NG_REG_FAN_CFG, reg); 498 mutex_unlock(&data->update_lock); 499 return count; 500 } 501 502 static ssize_t 503 store_pwm(struct device *dev, struct device_attribute *attr, 504 const char *buf, size_t count) 505 { 506 int nr = to_sensor_dev_attr(attr)->index; 507 struct w83l786ng_data *data = dev_get_drvdata(dev); 508 struct i2c_client *client = data->client; 509 unsigned long val; 510 int err; 511 512 err = kstrtoul(buf, 10, &val); 513 if (err) 514 return err; 515 val = clamp_val(val, 0, 255); 516 val = DIV_ROUND_CLOSEST(val, 0x11); 517 518 mutex_lock(&data->update_lock); 519 data->pwm[nr] = val * 0x11; 520 val |= w83l786ng_read_value(client, W83L786NG_REG_PWM[nr]) & 0xf0; 521 w83l786ng_write_value(client, W83L786NG_REG_PWM[nr], val); 522 mutex_unlock(&data->update_lock); 523 return count; 524 } 525 526 static ssize_t 527 store_pwm_enable(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 w83l786ng_data *data = dev_get_drvdata(dev); 532 struct i2c_client *client = data->client; 533 u8 reg; 534 unsigned long val; 535 int err; 536 537 err = kstrtoul(buf, 10, &val); 538 if (err) 539 return err; 540 541 if (!val || val > 2) /* only modes 1 and 2 are supported */ 542 return -EINVAL; 543 544 mutex_lock(&data->update_lock); 545 reg = w83l786ng_read_value(client, W83L786NG_REG_FAN_CFG); 546 data->pwm_enable[nr] = val; 547 reg &= ~(0x03 << W83L786NG_PWM_ENABLE_SHIFT[nr]); 548 reg |= (val - 1) << W83L786NG_PWM_ENABLE_SHIFT[nr]; 549 w83l786ng_write_value(client, W83L786NG_REG_FAN_CFG, reg); 550 mutex_unlock(&data->update_lock); 551 return count; 552 } 553 554 static struct sensor_device_attribute sda_pwm[] = { 555 SENSOR_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 0), 556 SENSOR_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 1), 557 }; 558 559 static struct sensor_device_attribute sda_pwm_mode[] = { 560 SENSOR_ATTR(pwm1_mode, S_IWUSR | S_IRUGO, show_pwm_mode, 561 store_pwm_mode, 0), 562 SENSOR_ATTR(pwm2_mode, S_IWUSR | S_IRUGO, show_pwm_mode, 563 store_pwm_mode, 1), 564 }; 565 566 static struct sensor_device_attribute sda_pwm_enable[] = { 567 SENSOR_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_enable, 568 store_pwm_enable, 0), 569 SENSOR_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_enable, 570 store_pwm_enable, 1), 571 }; 572 573 /* For Smart Fan I/Thermal Cruise and Smart Fan II */ 574 static ssize_t 575 show_tolerance(struct device *dev, struct device_attribute *attr, char *buf) 576 { 577 int nr = to_sensor_dev_attr(attr)->index; 578 struct w83l786ng_data *data = w83l786ng_update_device(dev); 579 return sprintf(buf, "%ld\n", (long)data->tolerance[nr]); 580 } 581 582 static ssize_t 583 store_tolerance(struct device *dev, struct device_attribute *attr, 584 const char *buf, size_t count) 585 { 586 int nr = to_sensor_dev_attr(attr)->index; 587 struct w83l786ng_data *data = dev_get_drvdata(dev); 588 struct i2c_client *client = data->client; 589 u8 tol_tmp, tol_mask; 590 unsigned long val; 591 int err; 592 593 err = kstrtoul(buf, 10, &val); 594 if (err) 595 return err; 596 597 mutex_lock(&data->update_lock); 598 tol_mask = w83l786ng_read_value(client, 599 W83L786NG_REG_TOLERANCE) & ((nr == 1) ? 0x0f : 0xf0); 600 tol_tmp = clamp_val(val, 0, 15); 601 tol_tmp &= 0x0f; 602 data->tolerance[nr] = tol_tmp; 603 if (nr == 1) 604 tol_tmp <<= 4; 605 606 w83l786ng_write_value(client, W83L786NG_REG_TOLERANCE, 607 tol_mask | tol_tmp); 608 mutex_unlock(&data->update_lock); 609 return count; 610 } 611 612 static struct sensor_device_attribute sda_tolerance[] = { 613 SENSOR_ATTR(pwm1_tolerance, S_IWUSR | S_IRUGO, 614 show_tolerance, store_tolerance, 0), 615 SENSOR_ATTR(pwm2_tolerance, S_IWUSR | S_IRUGO, 616 show_tolerance, store_tolerance, 1), 617 }; 618 619 620 #define IN_UNIT_ATTRS(X) \ 621 &sda_in_input[X].dev_attr.attr, \ 622 &sda_in_min[X].dev_attr.attr, \ 623 &sda_in_max[X].dev_attr.attr 624 625 #define FAN_UNIT_ATTRS(X) \ 626 &sda_fan_input[X].dev_attr.attr, \ 627 &sda_fan_min[X].dev_attr.attr, \ 628 &sda_fan_div[X].dev_attr.attr 629 630 #define TEMP_UNIT_ATTRS(X) \ 631 &sda_temp_input[X].dev_attr.attr, \ 632 &sda_temp_max[X].dev_attr.attr, \ 633 &sda_temp_max_hyst[X].dev_attr.attr 634 635 #define PWM_UNIT_ATTRS(X) \ 636 &sda_pwm[X].dev_attr.attr, \ 637 &sda_pwm_mode[X].dev_attr.attr, \ 638 &sda_pwm_enable[X].dev_attr.attr 639 640 #define TOLERANCE_UNIT_ATTRS(X) \ 641 &sda_tolerance[X].dev_attr.attr 642 643 static struct attribute *w83l786ng_attrs[] = { 644 IN_UNIT_ATTRS(0), 645 IN_UNIT_ATTRS(1), 646 IN_UNIT_ATTRS(2), 647 FAN_UNIT_ATTRS(0), 648 FAN_UNIT_ATTRS(1), 649 TEMP_UNIT_ATTRS(0), 650 TEMP_UNIT_ATTRS(1), 651 PWM_UNIT_ATTRS(0), 652 PWM_UNIT_ATTRS(1), 653 TOLERANCE_UNIT_ATTRS(0), 654 TOLERANCE_UNIT_ATTRS(1), 655 NULL 656 }; 657 658 ATTRIBUTE_GROUPS(w83l786ng); 659 660 static int 661 w83l786ng_detect(struct i2c_client *client, struct i2c_board_info *info) 662 { 663 struct i2c_adapter *adapter = client->adapter; 664 u16 man_id; 665 u8 chip_id; 666 667 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 668 return -ENODEV; 669 670 /* Detection */ 671 if ((w83l786ng_read_value(client, W83L786NG_REG_CONFIG) & 0x80)) { 672 dev_dbg(&adapter->dev, "W83L786NG detection failed at 0x%02x\n", 673 client->addr); 674 return -ENODEV; 675 } 676 677 /* Identification */ 678 man_id = (w83l786ng_read_value(client, W83L786NG_REG_MAN_ID1) << 8) + 679 w83l786ng_read_value(client, W83L786NG_REG_MAN_ID2); 680 chip_id = w83l786ng_read_value(client, W83L786NG_REG_CHIP_ID); 681 682 if (man_id != 0x5CA3 || /* Winbond */ 683 chip_id != 0x80) { /* W83L786NG */ 684 dev_dbg(&adapter->dev, 685 "Unsupported chip (man_id=0x%04X, chip_id=0x%02X)\n", 686 man_id, chip_id); 687 return -ENODEV; 688 } 689 690 strscpy(info->type, "w83l786ng", I2C_NAME_SIZE); 691 692 return 0; 693 } 694 695 static void w83l786ng_init_client(struct i2c_client *client) 696 { 697 u8 tmp; 698 699 if (reset) 700 w83l786ng_write_value(client, W83L786NG_REG_CONFIG, 0x80); 701 702 /* Start monitoring */ 703 tmp = w83l786ng_read_value(client, W83L786NG_REG_CONFIG); 704 if (!(tmp & 0x01)) 705 w83l786ng_write_value(client, W83L786NG_REG_CONFIG, tmp | 0x01); 706 } 707 708 static int 709 w83l786ng_probe(struct i2c_client *client) 710 { 711 struct device *dev = &client->dev; 712 struct w83l786ng_data *data; 713 struct device *hwmon_dev; 714 int i; 715 u8 reg_tmp; 716 717 data = devm_kzalloc(dev, sizeof(struct w83l786ng_data), GFP_KERNEL); 718 if (!data) 719 return -ENOMEM; 720 721 data->client = client; 722 mutex_init(&data->update_lock); 723 724 /* Initialize the chip */ 725 w83l786ng_init_client(client); 726 727 /* A few vars need to be filled upon startup */ 728 for (i = 0; i < 2; i++) { 729 data->fan_min[i] = w83l786ng_read_value(client, 730 W83L786NG_REG_FAN_MIN(i)); 731 } 732 733 /* Update the fan divisor */ 734 reg_tmp = w83l786ng_read_value(client, W83L786NG_REG_FAN_DIV); 735 data->fan_div[0] = reg_tmp & 0x07; 736 data->fan_div[1] = (reg_tmp >> 4) & 0x07; 737 738 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, 739 data, 740 w83l786ng_groups); 741 return PTR_ERR_OR_ZERO(hwmon_dev); 742 } 743 744 static const struct i2c_device_id w83l786ng_id[] = { 745 { "w83l786ng", 0 }, 746 { } 747 }; 748 MODULE_DEVICE_TABLE(i2c, w83l786ng_id); 749 750 static struct i2c_driver w83l786ng_driver = { 751 .class = I2C_CLASS_HWMON, 752 .driver = { 753 .name = "w83l786ng", 754 }, 755 .probe_new = w83l786ng_probe, 756 .id_table = w83l786ng_id, 757 .detect = w83l786ng_detect, 758 .address_list = normal_i2c, 759 }; 760 761 module_i2c_driver(w83l786ng_driver); 762 763 MODULE_AUTHOR("Kevin Lo"); 764 MODULE_DESCRIPTION("w83l786ng driver"); 765 MODULE_LICENSE("GPL"); 766