1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * lm63.c - driver for the National Semiconductor LM63 temperature sensor 4 * with integrated fan control 5 * Copyright (C) 2004-2008 Jean Delvare <jdelvare@suse.de> 6 * Based on the lm90 driver. 7 * 8 * The LM63 is a sensor chip made by National Semiconductor. It measures 9 * two temperatures (its own and one external one) and the speed of one 10 * fan, those speed it can additionally control. Complete datasheet can be 11 * obtained from National's website at: 12 * http://www.national.com/pf/LM/LM63.html 13 * 14 * The LM63 is basically an LM86 with fan speed monitoring and control 15 * capabilities added. It misses some of the LM86 features though: 16 * - No low limit for local temperature. 17 * - No critical limit for local temperature. 18 * - Critical limit for remote temperature can be changed only once. We 19 * will consider that the critical limit is read-only. 20 * 21 * The datasheet isn't very clear about what the tachometer reading is. 22 * I had a explanation from National Semiconductor though. The two lower 23 * bits of the read value have to be masked out. The value is still 16 bit 24 * in width. 25 */ 26 27 #include <linux/module.h> 28 #include <linux/init.h> 29 #include <linux/slab.h> 30 #include <linux/jiffies.h> 31 #include <linux/i2c.h> 32 #include <linux/hwmon-sysfs.h> 33 #include <linux/hwmon.h> 34 #include <linux/err.h> 35 #include <linux/mutex.h> 36 #include <linux/of_device.h> 37 #include <linux/sysfs.h> 38 #include <linux/types.h> 39 40 /* 41 * Addresses to scan 42 * Address is fully defined internally and cannot be changed except for 43 * LM64 which has one pin dedicated to address selection. 44 * LM63 and LM96163 have address 0x4c. 45 * LM64 can have address 0x18 or 0x4e. 46 */ 47 48 static const unsigned short normal_i2c[] = { 0x18, 0x4c, 0x4e, I2C_CLIENT_END }; 49 50 /* 51 * The LM63 registers 52 */ 53 54 #define LM63_REG_CONFIG1 0x03 55 #define LM63_REG_CONVRATE 0x04 56 #define LM63_REG_CONFIG2 0xBF 57 #define LM63_REG_CONFIG_FAN 0x4A 58 59 #define LM63_REG_TACH_COUNT_MSB 0x47 60 #define LM63_REG_TACH_COUNT_LSB 0x46 61 #define LM63_REG_TACH_LIMIT_MSB 0x49 62 #define LM63_REG_TACH_LIMIT_LSB 0x48 63 64 #define LM63_REG_PWM_VALUE 0x4C 65 #define LM63_REG_PWM_FREQ 0x4D 66 #define LM63_REG_LUT_TEMP_HYST 0x4F 67 #define LM63_REG_LUT_TEMP(nr) (0x50 + 2 * (nr)) 68 #define LM63_REG_LUT_PWM(nr) (0x51 + 2 * (nr)) 69 70 #define LM63_REG_LOCAL_TEMP 0x00 71 #define LM63_REG_LOCAL_HIGH 0x05 72 73 #define LM63_REG_REMOTE_TEMP_MSB 0x01 74 #define LM63_REG_REMOTE_TEMP_LSB 0x10 75 #define LM63_REG_REMOTE_OFFSET_MSB 0x11 76 #define LM63_REG_REMOTE_OFFSET_LSB 0x12 77 #define LM63_REG_REMOTE_HIGH_MSB 0x07 78 #define LM63_REG_REMOTE_HIGH_LSB 0x13 79 #define LM63_REG_REMOTE_LOW_MSB 0x08 80 #define LM63_REG_REMOTE_LOW_LSB 0x14 81 #define LM63_REG_REMOTE_TCRIT 0x19 82 #define LM63_REG_REMOTE_TCRIT_HYST 0x21 83 84 #define LM63_REG_ALERT_STATUS 0x02 85 #define LM63_REG_ALERT_MASK 0x16 86 87 #define LM63_REG_MAN_ID 0xFE 88 #define LM63_REG_CHIP_ID 0xFF 89 90 #define LM96163_REG_TRUTHERM 0x30 91 #define LM96163_REG_REMOTE_TEMP_U_MSB 0x31 92 #define LM96163_REG_REMOTE_TEMP_U_LSB 0x32 93 #define LM96163_REG_CONFIG_ENHANCED 0x45 94 95 #define LM63_MAX_CONVRATE 9 96 97 #define LM63_MAX_CONVRATE_HZ 32 98 #define LM96163_MAX_CONVRATE_HZ 26 99 100 /* 101 * Conversions and various macros 102 * For tachometer counts, the LM63 uses 16-bit values. 103 * For local temperature and high limit, remote critical limit and hysteresis 104 * value, it uses signed 8-bit values with LSB = 1 degree Celsius. 105 * For remote temperature, low and high limits, it uses signed 11-bit values 106 * with LSB = 0.125 degree Celsius, left-justified in 16-bit registers. 107 * For LM64 the actual remote diode temperature is 16 degree Celsius higher 108 * than the register reading. Remote temperature setpoints have to be 109 * adapted accordingly. 110 */ 111 112 #define FAN_FROM_REG(reg) ((reg) == 0xFFFC || (reg) == 0 ? 0 : \ 113 5400000 / (reg)) 114 #define FAN_TO_REG(val) ((val) <= 82 ? 0xFFFC : \ 115 (5400000 / (val)) & 0xFFFC) 116 #define TEMP8_FROM_REG(reg) ((reg) * 1000) 117 #define TEMP8_TO_REG(val) DIV_ROUND_CLOSEST(clamp_val((val), -128000, \ 118 127000), 1000) 119 #define TEMP8U_TO_REG(val) DIV_ROUND_CLOSEST(clamp_val((val), 0, \ 120 255000), 1000) 121 #define TEMP11_FROM_REG(reg) ((reg) / 32 * 125) 122 #define TEMP11_TO_REG(val) (DIV_ROUND_CLOSEST(clamp_val((val), -128000, \ 123 127875), 125) * 32) 124 #define TEMP11U_TO_REG(val) (DIV_ROUND_CLOSEST(clamp_val((val), 0, \ 125 255875), 125) * 32) 126 #define HYST_TO_REG(val) DIV_ROUND_CLOSEST(clamp_val((val), 0, 127000), \ 127 1000) 128 129 #define UPDATE_INTERVAL(max, rate) \ 130 ((1000 << (LM63_MAX_CONVRATE - (rate))) / (max)) 131 132 enum chips { lm63, lm64, lm96163 }; 133 134 /* 135 * Client data (each client gets its own) 136 */ 137 138 struct lm63_data { 139 struct i2c_client *client; 140 struct mutex update_lock; 141 const struct attribute_group *groups[5]; 142 char valid; /* zero until following fields are valid */ 143 char lut_valid; /* zero until lut fields are valid */ 144 unsigned long last_updated; /* in jiffies */ 145 unsigned long lut_last_updated; /* in jiffies */ 146 enum chips kind; 147 int temp2_offset; 148 149 int update_interval; /* in milliseconds */ 150 int max_convrate_hz; 151 int lut_size; /* 8 or 12 */ 152 153 /* registers values */ 154 u8 config, config_fan; 155 u16 fan[2]; /* 0: input 156 1: low limit */ 157 u8 pwm1_freq; 158 u8 pwm1[13]; /* 0: current output 159 1-12: lookup table */ 160 s8 temp8[15]; /* 0: local input 161 1: local high limit 162 2: remote critical limit 163 3-14: lookup table */ 164 s16 temp11[4]; /* 0: remote input 165 1: remote low limit 166 2: remote high limit 167 3: remote offset */ 168 u16 temp11u; /* remote input (unsigned) */ 169 u8 temp2_crit_hyst; 170 u8 lut_temp_hyst; 171 u8 alarms; 172 bool pwm_highres; 173 bool lut_temp_highres; 174 bool remote_unsigned; /* true if unsigned remote upper limits */ 175 bool trutherm; 176 }; 177 178 static inline int temp8_from_reg(struct lm63_data *data, int nr) 179 { 180 if (data->remote_unsigned) 181 return TEMP8_FROM_REG((u8)data->temp8[nr]); 182 return TEMP8_FROM_REG(data->temp8[nr]); 183 } 184 185 static inline int lut_temp_from_reg(struct lm63_data *data, int nr) 186 { 187 return data->temp8[nr] * (data->lut_temp_highres ? 500 : 1000); 188 } 189 190 static inline int lut_temp_to_reg(struct lm63_data *data, long val) 191 { 192 val -= data->temp2_offset; 193 if (data->lut_temp_highres) 194 return DIV_ROUND_CLOSEST(clamp_val(val, 0, 127500), 500); 195 else 196 return DIV_ROUND_CLOSEST(clamp_val(val, 0, 127000), 1000); 197 } 198 199 /* 200 * Update the lookup table register cache. 201 * client->update_lock must be held when calling this function. 202 */ 203 static void lm63_update_lut(struct lm63_data *data) 204 { 205 struct i2c_client *client = data->client; 206 int i; 207 208 if (time_after(jiffies, data->lut_last_updated + 5 * HZ) || 209 !data->lut_valid) { 210 for (i = 0; i < data->lut_size; i++) { 211 data->pwm1[1 + i] = i2c_smbus_read_byte_data(client, 212 LM63_REG_LUT_PWM(i)); 213 data->temp8[3 + i] = i2c_smbus_read_byte_data(client, 214 LM63_REG_LUT_TEMP(i)); 215 } 216 data->lut_temp_hyst = i2c_smbus_read_byte_data(client, 217 LM63_REG_LUT_TEMP_HYST); 218 219 data->lut_last_updated = jiffies; 220 data->lut_valid = 1; 221 } 222 } 223 224 static struct lm63_data *lm63_update_device(struct device *dev) 225 { 226 struct lm63_data *data = dev_get_drvdata(dev); 227 struct i2c_client *client = data->client; 228 unsigned long next_update; 229 230 mutex_lock(&data->update_lock); 231 232 next_update = data->last_updated + 233 msecs_to_jiffies(data->update_interval); 234 if (time_after(jiffies, next_update) || !data->valid) { 235 if (data->config & 0x04) { /* tachometer enabled */ 236 /* order matters for fan1_input */ 237 data->fan[0] = i2c_smbus_read_byte_data(client, 238 LM63_REG_TACH_COUNT_LSB) & 0xFC; 239 data->fan[0] |= i2c_smbus_read_byte_data(client, 240 LM63_REG_TACH_COUNT_MSB) << 8; 241 data->fan[1] = (i2c_smbus_read_byte_data(client, 242 LM63_REG_TACH_LIMIT_LSB) & 0xFC) 243 | (i2c_smbus_read_byte_data(client, 244 LM63_REG_TACH_LIMIT_MSB) << 8); 245 } 246 247 data->pwm1_freq = i2c_smbus_read_byte_data(client, 248 LM63_REG_PWM_FREQ); 249 if (data->pwm1_freq == 0) 250 data->pwm1_freq = 1; 251 data->pwm1[0] = i2c_smbus_read_byte_data(client, 252 LM63_REG_PWM_VALUE); 253 254 data->temp8[0] = i2c_smbus_read_byte_data(client, 255 LM63_REG_LOCAL_TEMP); 256 data->temp8[1] = i2c_smbus_read_byte_data(client, 257 LM63_REG_LOCAL_HIGH); 258 259 /* order matters for temp2_input */ 260 data->temp11[0] = i2c_smbus_read_byte_data(client, 261 LM63_REG_REMOTE_TEMP_MSB) << 8; 262 data->temp11[0] |= i2c_smbus_read_byte_data(client, 263 LM63_REG_REMOTE_TEMP_LSB); 264 data->temp11[1] = (i2c_smbus_read_byte_data(client, 265 LM63_REG_REMOTE_LOW_MSB) << 8) 266 | i2c_smbus_read_byte_data(client, 267 LM63_REG_REMOTE_LOW_LSB); 268 data->temp11[2] = (i2c_smbus_read_byte_data(client, 269 LM63_REG_REMOTE_HIGH_MSB) << 8) 270 | i2c_smbus_read_byte_data(client, 271 LM63_REG_REMOTE_HIGH_LSB); 272 data->temp11[3] = (i2c_smbus_read_byte_data(client, 273 LM63_REG_REMOTE_OFFSET_MSB) << 8) 274 | i2c_smbus_read_byte_data(client, 275 LM63_REG_REMOTE_OFFSET_LSB); 276 277 if (data->kind == lm96163) 278 data->temp11u = (i2c_smbus_read_byte_data(client, 279 LM96163_REG_REMOTE_TEMP_U_MSB) << 8) 280 | i2c_smbus_read_byte_data(client, 281 LM96163_REG_REMOTE_TEMP_U_LSB); 282 283 data->temp8[2] = i2c_smbus_read_byte_data(client, 284 LM63_REG_REMOTE_TCRIT); 285 data->temp2_crit_hyst = i2c_smbus_read_byte_data(client, 286 LM63_REG_REMOTE_TCRIT_HYST); 287 288 data->alarms = i2c_smbus_read_byte_data(client, 289 LM63_REG_ALERT_STATUS) & 0x7F; 290 291 data->last_updated = jiffies; 292 data->valid = 1; 293 } 294 295 lm63_update_lut(data); 296 297 mutex_unlock(&data->update_lock); 298 299 return data; 300 } 301 302 /* 303 * Trip points in the lookup table should be in ascending order for both 304 * temperatures and PWM output values. 305 */ 306 static int lm63_lut_looks_bad(struct device *dev, struct lm63_data *data) 307 { 308 int i; 309 310 mutex_lock(&data->update_lock); 311 lm63_update_lut(data); 312 313 for (i = 1; i < data->lut_size; i++) { 314 if (data->pwm1[1 + i - 1] > data->pwm1[1 + i] 315 || data->temp8[3 + i - 1] > data->temp8[3 + i]) { 316 dev_warn(dev, 317 "Lookup table doesn't look sane (check entries %d and %d)\n", 318 i, i + 1); 319 break; 320 } 321 } 322 mutex_unlock(&data->update_lock); 323 324 return i == data->lut_size ? 0 : 1; 325 } 326 327 /* 328 * Sysfs callback functions and files 329 */ 330 331 static ssize_t show_fan(struct device *dev, struct device_attribute *devattr, 332 char *buf) 333 { 334 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 335 struct lm63_data *data = lm63_update_device(dev); 336 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index])); 337 } 338 339 static ssize_t set_fan(struct device *dev, struct device_attribute *dummy, 340 const char *buf, size_t count) 341 { 342 struct lm63_data *data = dev_get_drvdata(dev); 343 struct i2c_client *client = data->client; 344 unsigned long val; 345 int err; 346 347 err = kstrtoul(buf, 10, &val); 348 if (err) 349 return err; 350 351 mutex_lock(&data->update_lock); 352 data->fan[1] = FAN_TO_REG(val); 353 i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_LSB, 354 data->fan[1] & 0xFF); 355 i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_MSB, 356 data->fan[1] >> 8); 357 mutex_unlock(&data->update_lock); 358 return count; 359 } 360 361 static ssize_t show_pwm1(struct device *dev, struct device_attribute *devattr, 362 char *buf) 363 { 364 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 365 struct lm63_data *data = lm63_update_device(dev); 366 int nr = attr->index; 367 int pwm; 368 369 if (data->pwm_highres) 370 pwm = data->pwm1[nr]; 371 else 372 pwm = data->pwm1[nr] >= 2 * data->pwm1_freq ? 373 255 : (data->pwm1[nr] * 255 + data->pwm1_freq) / 374 (2 * data->pwm1_freq); 375 376 return sprintf(buf, "%d\n", pwm); 377 } 378 379 static ssize_t set_pwm1(struct device *dev, struct device_attribute *devattr, 380 const char *buf, size_t count) 381 { 382 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 383 struct lm63_data *data = dev_get_drvdata(dev); 384 struct i2c_client *client = data->client; 385 int nr = attr->index; 386 unsigned long val; 387 int err; 388 u8 reg; 389 390 if (!(data->config_fan & 0x20)) /* register is read-only */ 391 return -EPERM; 392 393 err = kstrtoul(buf, 10, &val); 394 if (err) 395 return err; 396 397 reg = nr ? LM63_REG_LUT_PWM(nr - 1) : LM63_REG_PWM_VALUE; 398 val = clamp_val(val, 0, 255); 399 400 mutex_lock(&data->update_lock); 401 data->pwm1[nr] = data->pwm_highres ? val : 402 (val * data->pwm1_freq * 2 + 127) / 255; 403 i2c_smbus_write_byte_data(client, reg, data->pwm1[nr]); 404 mutex_unlock(&data->update_lock); 405 return count; 406 } 407 408 static ssize_t pwm1_enable_show(struct device *dev, 409 struct device_attribute *dummy, char *buf) 410 { 411 struct lm63_data *data = lm63_update_device(dev); 412 return sprintf(buf, "%d\n", data->config_fan & 0x20 ? 1 : 2); 413 } 414 415 static ssize_t pwm1_enable_store(struct device *dev, 416 struct device_attribute *dummy, 417 const char *buf, size_t count) 418 { 419 struct lm63_data *data = dev_get_drvdata(dev); 420 struct i2c_client *client = data->client; 421 unsigned long val; 422 int err; 423 424 err = kstrtoul(buf, 10, &val); 425 if (err) 426 return err; 427 if (val < 1 || val > 2) 428 return -EINVAL; 429 430 /* 431 * Only let the user switch to automatic mode if the lookup table 432 * looks sane. 433 */ 434 if (val == 2 && lm63_lut_looks_bad(dev, data)) 435 return -EPERM; 436 437 mutex_lock(&data->update_lock); 438 data->config_fan = i2c_smbus_read_byte_data(client, 439 LM63_REG_CONFIG_FAN); 440 if (val == 1) 441 data->config_fan |= 0x20; 442 else 443 data->config_fan &= ~0x20; 444 i2c_smbus_write_byte_data(client, LM63_REG_CONFIG_FAN, 445 data->config_fan); 446 mutex_unlock(&data->update_lock); 447 return count; 448 } 449 450 /* 451 * There are 8bit registers for both local(temp1) and remote(temp2) sensor. 452 * For remote sensor registers temp2_offset has to be considered, 453 * for local sensor it must not. 454 * So we need separate 8bit accessors for local and remote sensor. 455 */ 456 static ssize_t show_local_temp8(struct device *dev, 457 struct device_attribute *devattr, 458 char *buf) 459 { 460 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 461 struct lm63_data *data = lm63_update_device(dev); 462 return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[attr->index])); 463 } 464 465 static ssize_t show_remote_temp8(struct device *dev, 466 struct device_attribute *devattr, 467 char *buf) 468 { 469 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 470 struct lm63_data *data = lm63_update_device(dev); 471 return sprintf(buf, "%d\n", temp8_from_reg(data, attr->index) 472 + data->temp2_offset); 473 } 474 475 static ssize_t show_lut_temp(struct device *dev, 476 struct device_attribute *devattr, 477 char *buf) 478 { 479 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 480 struct lm63_data *data = lm63_update_device(dev); 481 return sprintf(buf, "%d\n", lut_temp_from_reg(data, attr->index) 482 + data->temp2_offset); 483 } 484 485 static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr, 486 const char *buf, size_t count) 487 { 488 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 489 struct lm63_data *data = dev_get_drvdata(dev); 490 struct i2c_client *client = data->client; 491 int nr = attr->index; 492 long val; 493 int err; 494 int temp; 495 u8 reg; 496 497 err = kstrtol(buf, 10, &val); 498 if (err) 499 return err; 500 501 mutex_lock(&data->update_lock); 502 switch (nr) { 503 case 2: 504 reg = LM63_REG_REMOTE_TCRIT; 505 if (data->remote_unsigned) 506 temp = TEMP8U_TO_REG(val - data->temp2_offset); 507 else 508 temp = TEMP8_TO_REG(val - data->temp2_offset); 509 break; 510 case 1: 511 reg = LM63_REG_LOCAL_HIGH; 512 temp = TEMP8_TO_REG(val); 513 break; 514 default: /* lookup table */ 515 reg = LM63_REG_LUT_TEMP(nr - 3); 516 temp = lut_temp_to_reg(data, val); 517 } 518 data->temp8[nr] = temp; 519 i2c_smbus_write_byte_data(client, reg, temp); 520 mutex_unlock(&data->update_lock); 521 return count; 522 } 523 524 static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr, 525 char *buf) 526 { 527 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 528 struct lm63_data *data = lm63_update_device(dev); 529 int nr = attr->index; 530 int temp; 531 532 if (!nr) { 533 /* 534 * Use unsigned temperature unless its value is zero. 535 * If it is zero, use signed temperature. 536 */ 537 if (data->temp11u) 538 temp = TEMP11_FROM_REG(data->temp11u); 539 else 540 temp = TEMP11_FROM_REG(data->temp11[nr]); 541 } else { 542 if (data->remote_unsigned && nr == 2) 543 temp = TEMP11_FROM_REG((u16)data->temp11[nr]); 544 else 545 temp = TEMP11_FROM_REG(data->temp11[nr]); 546 } 547 return sprintf(buf, "%d\n", temp + data->temp2_offset); 548 } 549 550 static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr, 551 const char *buf, size_t count) 552 { 553 static const u8 reg[6] = { 554 LM63_REG_REMOTE_LOW_MSB, 555 LM63_REG_REMOTE_LOW_LSB, 556 LM63_REG_REMOTE_HIGH_MSB, 557 LM63_REG_REMOTE_HIGH_LSB, 558 LM63_REG_REMOTE_OFFSET_MSB, 559 LM63_REG_REMOTE_OFFSET_LSB, 560 }; 561 562 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 563 struct lm63_data *data = dev_get_drvdata(dev); 564 struct i2c_client *client = data->client; 565 long val; 566 int err; 567 int nr = attr->index; 568 569 err = kstrtol(buf, 10, &val); 570 if (err) 571 return err; 572 573 mutex_lock(&data->update_lock); 574 if (data->remote_unsigned && nr == 2) 575 data->temp11[nr] = TEMP11U_TO_REG(val - data->temp2_offset); 576 else 577 data->temp11[nr] = TEMP11_TO_REG(val - data->temp2_offset); 578 579 i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2], 580 data->temp11[nr] >> 8); 581 i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1], 582 data->temp11[nr] & 0xff); 583 mutex_unlock(&data->update_lock); 584 return count; 585 } 586 587 /* 588 * Hysteresis register holds a relative value, while we want to present 589 * an absolute to user-space 590 */ 591 static ssize_t temp2_crit_hyst_show(struct device *dev, 592 struct device_attribute *dummy, char *buf) 593 { 594 struct lm63_data *data = lm63_update_device(dev); 595 return sprintf(buf, "%d\n", temp8_from_reg(data, 2) 596 + data->temp2_offset 597 - TEMP8_FROM_REG(data->temp2_crit_hyst)); 598 } 599 600 static ssize_t show_lut_temp_hyst(struct device *dev, 601 struct device_attribute *devattr, char *buf) 602 { 603 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 604 struct lm63_data *data = lm63_update_device(dev); 605 606 return sprintf(buf, "%d\n", lut_temp_from_reg(data, attr->index) 607 + data->temp2_offset 608 - TEMP8_FROM_REG(data->lut_temp_hyst)); 609 } 610 611 /* 612 * And now the other way around, user-space provides an absolute 613 * hysteresis value and we have to store a relative one 614 */ 615 static ssize_t temp2_crit_hyst_store(struct device *dev, 616 struct device_attribute *dummy, 617 const char *buf, size_t count) 618 { 619 struct lm63_data *data = dev_get_drvdata(dev); 620 struct i2c_client *client = data->client; 621 long val; 622 int err; 623 long hyst; 624 625 err = kstrtol(buf, 10, &val); 626 if (err) 627 return err; 628 629 mutex_lock(&data->update_lock); 630 hyst = temp8_from_reg(data, 2) + data->temp2_offset - val; 631 i2c_smbus_write_byte_data(client, LM63_REG_REMOTE_TCRIT_HYST, 632 HYST_TO_REG(hyst)); 633 mutex_unlock(&data->update_lock); 634 return count; 635 } 636 637 /* 638 * Set conversion rate. 639 * client->update_lock must be held when calling this function. 640 */ 641 static void lm63_set_convrate(struct lm63_data *data, unsigned int interval) 642 { 643 struct i2c_client *client = data->client; 644 unsigned int update_interval; 645 int i; 646 647 /* Shift calculations to avoid rounding errors */ 648 interval <<= 6; 649 650 /* find the nearest update rate */ 651 update_interval = (1 << (LM63_MAX_CONVRATE + 6)) * 1000 652 / data->max_convrate_hz; 653 for (i = 0; i < LM63_MAX_CONVRATE; i++, update_interval >>= 1) 654 if (interval >= update_interval * 3 / 4) 655 break; 656 657 i2c_smbus_write_byte_data(client, LM63_REG_CONVRATE, i); 658 data->update_interval = UPDATE_INTERVAL(data->max_convrate_hz, i); 659 } 660 661 static ssize_t update_interval_show(struct device *dev, 662 struct device_attribute *attr, char *buf) 663 { 664 struct lm63_data *data = dev_get_drvdata(dev); 665 666 return sprintf(buf, "%u\n", data->update_interval); 667 } 668 669 static ssize_t update_interval_store(struct device *dev, 670 struct device_attribute *attr, 671 const char *buf, size_t count) 672 { 673 struct lm63_data *data = dev_get_drvdata(dev); 674 unsigned long val; 675 int err; 676 677 err = kstrtoul(buf, 10, &val); 678 if (err) 679 return err; 680 681 mutex_lock(&data->update_lock); 682 lm63_set_convrate(data, clamp_val(val, 0, 100000)); 683 mutex_unlock(&data->update_lock); 684 685 return count; 686 } 687 688 static ssize_t temp2_type_show(struct device *dev, 689 struct device_attribute *attr, char *buf) 690 { 691 struct lm63_data *data = dev_get_drvdata(dev); 692 693 return sprintf(buf, data->trutherm ? "1\n" : "2\n"); 694 } 695 696 static ssize_t temp2_type_store(struct device *dev, 697 struct device_attribute *attr, 698 const char *buf, size_t count) 699 { 700 struct lm63_data *data = dev_get_drvdata(dev); 701 struct i2c_client *client = data->client; 702 unsigned long val; 703 int ret; 704 u8 reg; 705 706 ret = kstrtoul(buf, 10, &val); 707 if (ret < 0) 708 return ret; 709 if (val != 1 && val != 2) 710 return -EINVAL; 711 712 mutex_lock(&data->update_lock); 713 data->trutherm = val == 1; 714 reg = i2c_smbus_read_byte_data(client, LM96163_REG_TRUTHERM) & ~0x02; 715 i2c_smbus_write_byte_data(client, LM96163_REG_TRUTHERM, 716 reg | (data->trutherm ? 0x02 : 0x00)); 717 data->valid = 0; 718 mutex_unlock(&data->update_lock); 719 720 return count; 721 } 722 723 static ssize_t alarms_show(struct device *dev, struct device_attribute *dummy, 724 char *buf) 725 { 726 struct lm63_data *data = lm63_update_device(dev); 727 return sprintf(buf, "%u\n", data->alarms); 728 } 729 730 static ssize_t show_alarm(struct device *dev, struct device_attribute *devattr, 731 char *buf) 732 { 733 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 734 struct lm63_data *data = lm63_update_device(dev); 735 int bitnr = attr->index; 736 737 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 738 } 739 740 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0); 741 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan, 742 set_fan, 1); 743 744 static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm1, set_pwm1, 0); 745 static DEVICE_ATTR_RW(pwm1_enable); 746 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IWUSR | S_IRUGO, 747 show_pwm1, set_pwm1, 1); 748 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp, S_IWUSR | S_IRUGO, 749 show_lut_temp, set_temp8, 3); 750 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp_hyst, S_IRUGO, 751 show_lut_temp_hyst, NULL, 3); 752 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO, 753 show_pwm1, set_pwm1, 2); 754 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp, S_IWUSR | S_IRUGO, 755 show_lut_temp, set_temp8, 4); 756 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp_hyst, S_IRUGO, 757 show_lut_temp_hyst, NULL, 4); 758 static SENSOR_DEVICE_ATTR(pwm1_auto_point3_pwm, S_IWUSR | S_IRUGO, 759 show_pwm1, set_pwm1, 3); 760 static SENSOR_DEVICE_ATTR(pwm1_auto_point3_temp, S_IWUSR | S_IRUGO, 761 show_lut_temp, set_temp8, 5); 762 static SENSOR_DEVICE_ATTR(pwm1_auto_point3_temp_hyst, S_IRUGO, 763 show_lut_temp_hyst, NULL, 5); 764 static SENSOR_DEVICE_ATTR(pwm1_auto_point4_pwm, S_IWUSR | S_IRUGO, 765 show_pwm1, set_pwm1, 4); 766 static SENSOR_DEVICE_ATTR(pwm1_auto_point4_temp, S_IWUSR | S_IRUGO, 767 show_lut_temp, set_temp8, 6); 768 static SENSOR_DEVICE_ATTR(pwm1_auto_point4_temp_hyst, S_IRUGO, 769 show_lut_temp_hyst, NULL, 6); 770 static SENSOR_DEVICE_ATTR(pwm1_auto_point5_pwm, S_IWUSR | S_IRUGO, 771 show_pwm1, set_pwm1, 5); 772 static SENSOR_DEVICE_ATTR(pwm1_auto_point5_temp, S_IWUSR | S_IRUGO, 773 show_lut_temp, set_temp8, 7); 774 static SENSOR_DEVICE_ATTR(pwm1_auto_point5_temp_hyst, S_IRUGO, 775 show_lut_temp_hyst, NULL, 7); 776 static SENSOR_DEVICE_ATTR(pwm1_auto_point6_pwm, S_IWUSR | S_IRUGO, 777 show_pwm1, set_pwm1, 6); 778 static SENSOR_DEVICE_ATTR(pwm1_auto_point6_temp, S_IWUSR | S_IRUGO, 779 show_lut_temp, set_temp8, 8); 780 static SENSOR_DEVICE_ATTR(pwm1_auto_point6_temp_hyst, S_IRUGO, 781 show_lut_temp_hyst, NULL, 8); 782 static SENSOR_DEVICE_ATTR(pwm1_auto_point7_pwm, S_IWUSR | S_IRUGO, 783 show_pwm1, set_pwm1, 7); 784 static SENSOR_DEVICE_ATTR(pwm1_auto_point7_temp, S_IWUSR | S_IRUGO, 785 show_lut_temp, set_temp8, 9); 786 static SENSOR_DEVICE_ATTR(pwm1_auto_point7_temp_hyst, S_IRUGO, 787 show_lut_temp_hyst, NULL, 9); 788 static SENSOR_DEVICE_ATTR(pwm1_auto_point8_pwm, S_IWUSR | S_IRUGO, 789 show_pwm1, set_pwm1, 8); 790 static SENSOR_DEVICE_ATTR(pwm1_auto_point8_temp, S_IWUSR | S_IRUGO, 791 show_lut_temp, set_temp8, 10); 792 static SENSOR_DEVICE_ATTR(pwm1_auto_point8_temp_hyst, S_IRUGO, 793 show_lut_temp_hyst, NULL, 10); 794 static SENSOR_DEVICE_ATTR(pwm1_auto_point9_pwm, S_IWUSR | S_IRUGO, 795 show_pwm1, set_pwm1, 9); 796 static SENSOR_DEVICE_ATTR(pwm1_auto_point9_temp, S_IWUSR | S_IRUGO, 797 show_lut_temp, set_temp8, 11); 798 static SENSOR_DEVICE_ATTR(pwm1_auto_point9_temp_hyst, S_IRUGO, 799 show_lut_temp_hyst, NULL, 11); 800 static SENSOR_DEVICE_ATTR(pwm1_auto_point10_pwm, S_IWUSR | S_IRUGO, 801 show_pwm1, set_pwm1, 10); 802 static SENSOR_DEVICE_ATTR(pwm1_auto_point10_temp, S_IWUSR | S_IRUGO, 803 show_lut_temp, set_temp8, 12); 804 static SENSOR_DEVICE_ATTR(pwm1_auto_point10_temp_hyst, S_IRUGO, 805 show_lut_temp_hyst, NULL, 12); 806 static SENSOR_DEVICE_ATTR(pwm1_auto_point11_pwm, S_IWUSR | S_IRUGO, 807 show_pwm1, set_pwm1, 11); 808 static SENSOR_DEVICE_ATTR(pwm1_auto_point11_temp, S_IWUSR | S_IRUGO, 809 show_lut_temp, set_temp8, 13); 810 static SENSOR_DEVICE_ATTR(pwm1_auto_point11_temp_hyst, S_IRUGO, 811 show_lut_temp_hyst, NULL, 13); 812 static SENSOR_DEVICE_ATTR(pwm1_auto_point12_pwm, S_IWUSR | S_IRUGO, 813 show_pwm1, set_pwm1, 12); 814 static SENSOR_DEVICE_ATTR(pwm1_auto_point12_temp, S_IWUSR | S_IRUGO, 815 show_lut_temp, set_temp8, 14); 816 static SENSOR_DEVICE_ATTR(pwm1_auto_point12_temp_hyst, S_IRUGO, 817 show_lut_temp_hyst, NULL, 14); 818 819 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_local_temp8, NULL, 0); 820 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_local_temp8, 821 set_temp8, 1); 822 823 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0); 824 static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11, 825 set_temp11, 1); 826 static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11, 827 set_temp11, 2); 828 static SENSOR_DEVICE_ATTR(temp2_offset, S_IWUSR | S_IRUGO, show_temp11, 829 set_temp11, 3); 830 static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_remote_temp8, 831 set_temp8, 2); 832 static DEVICE_ATTR_RW(temp2_crit_hyst); 833 834 static DEVICE_ATTR_RW(temp2_type); 835 836 /* Individual alarm files */ 837 static SENSOR_DEVICE_ATTR(fan1_min_alarm, S_IRUGO, show_alarm, NULL, 0); 838 static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1); 839 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2); 840 static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3); 841 static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4); 842 static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6); 843 /* Raw alarm file for compatibility */ 844 static DEVICE_ATTR_RO(alarms); 845 846 static DEVICE_ATTR_RW(update_interval); 847 848 static struct attribute *lm63_attributes[] = { 849 &sensor_dev_attr_pwm1.dev_attr.attr, 850 &dev_attr_pwm1_enable.attr, 851 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr, 852 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr, 853 &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr, 854 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr, 855 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr, 856 &sensor_dev_attr_pwm1_auto_point2_temp_hyst.dev_attr.attr, 857 &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr, 858 &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr, 859 &sensor_dev_attr_pwm1_auto_point3_temp_hyst.dev_attr.attr, 860 &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr, 861 &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr, 862 &sensor_dev_attr_pwm1_auto_point4_temp_hyst.dev_attr.attr, 863 &sensor_dev_attr_pwm1_auto_point5_pwm.dev_attr.attr, 864 &sensor_dev_attr_pwm1_auto_point5_temp.dev_attr.attr, 865 &sensor_dev_attr_pwm1_auto_point5_temp_hyst.dev_attr.attr, 866 &sensor_dev_attr_pwm1_auto_point6_pwm.dev_attr.attr, 867 &sensor_dev_attr_pwm1_auto_point6_temp.dev_attr.attr, 868 &sensor_dev_attr_pwm1_auto_point6_temp_hyst.dev_attr.attr, 869 &sensor_dev_attr_pwm1_auto_point7_pwm.dev_attr.attr, 870 &sensor_dev_attr_pwm1_auto_point7_temp.dev_attr.attr, 871 &sensor_dev_attr_pwm1_auto_point7_temp_hyst.dev_attr.attr, 872 &sensor_dev_attr_pwm1_auto_point8_pwm.dev_attr.attr, 873 &sensor_dev_attr_pwm1_auto_point8_temp.dev_attr.attr, 874 &sensor_dev_attr_pwm1_auto_point8_temp_hyst.dev_attr.attr, 875 876 &sensor_dev_attr_temp1_input.dev_attr.attr, 877 &sensor_dev_attr_temp2_input.dev_attr.attr, 878 &sensor_dev_attr_temp2_min.dev_attr.attr, 879 &sensor_dev_attr_temp1_max.dev_attr.attr, 880 &sensor_dev_attr_temp2_max.dev_attr.attr, 881 &sensor_dev_attr_temp2_offset.dev_attr.attr, 882 &sensor_dev_attr_temp2_crit.dev_attr.attr, 883 &dev_attr_temp2_crit_hyst.attr, 884 885 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, 886 &sensor_dev_attr_temp2_fault.dev_attr.attr, 887 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr, 888 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, 889 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, 890 &dev_attr_alarms.attr, 891 &dev_attr_update_interval.attr, 892 NULL 893 }; 894 895 static struct attribute *lm63_attributes_temp2_type[] = { 896 &dev_attr_temp2_type.attr, 897 NULL 898 }; 899 900 static const struct attribute_group lm63_group_temp2_type = { 901 .attrs = lm63_attributes_temp2_type, 902 }; 903 904 static struct attribute *lm63_attributes_extra_lut[] = { 905 &sensor_dev_attr_pwm1_auto_point9_pwm.dev_attr.attr, 906 &sensor_dev_attr_pwm1_auto_point9_temp.dev_attr.attr, 907 &sensor_dev_attr_pwm1_auto_point9_temp_hyst.dev_attr.attr, 908 &sensor_dev_attr_pwm1_auto_point10_pwm.dev_attr.attr, 909 &sensor_dev_attr_pwm1_auto_point10_temp.dev_attr.attr, 910 &sensor_dev_attr_pwm1_auto_point10_temp_hyst.dev_attr.attr, 911 &sensor_dev_attr_pwm1_auto_point11_pwm.dev_attr.attr, 912 &sensor_dev_attr_pwm1_auto_point11_temp.dev_attr.attr, 913 &sensor_dev_attr_pwm1_auto_point11_temp_hyst.dev_attr.attr, 914 &sensor_dev_attr_pwm1_auto_point12_pwm.dev_attr.attr, 915 &sensor_dev_attr_pwm1_auto_point12_temp.dev_attr.attr, 916 &sensor_dev_attr_pwm1_auto_point12_temp_hyst.dev_attr.attr, 917 NULL 918 }; 919 920 static const struct attribute_group lm63_group_extra_lut = { 921 .attrs = lm63_attributes_extra_lut, 922 }; 923 924 /* 925 * On LM63, temp2_crit can be set only once, which should be job 926 * of the bootloader. 927 * On LM64, temp2_crit can always be set. 928 * On LM96163, temp2_crit can be set if bit 1 of the configuration 929 * register is true. 930 */ 931 static umode_t lm63_attribute_mode(struct kobject *kobj, 932 struct attribute *attr, int index) 933 { 934 struct device *dev = container_of(kobj, struct device, kobj); 935 struct lm63_data *data = dev_get_drvdata(dev); 936 937 if (attr == &sensor_dev_attr_temp2_crit.dev_attr.attr 938 && (data->kind == lm64 || 939 (data->kind == lm96163 && (data->config & 0x02)))) 940 return attr->mode | S_IWUSR; 941 942 return attr->mode; 943 } 944 945 static const struct attribute_group lm63_group = { 946 .is_visible = lm63_attribute_mode, 947 .attrs = lm63_attributes, 948 }; 949 950 static struct attribute *lm63_attributes_fan1[] = { 951 &sensor_dev_attr_fan1_input.dev_attr.attr, 952 &sensor_dev_attr_fan1_min.dev_attr.attr, 953 954 &sensor_dev_attr_fan1_min_alarm.dev_attr.attr, 955 NULL 956 }; 957 958 static const struct attribute_group lm63_group_fan1 = { 959 .attrs = lm63_attributes_fan1, 960 }; 961 962 /* 963 * Real code 964 */ 965 966 /* Return 0 if detection is successful, -ENODEV otherwise */ 967 static int lm63_detect(struct i2c_client *client, 968 struct i2c_board_info *info) 969 { 970 struct i2c_adapter *adapter = client->adapter; 971 u8 man_id, chip_id, reg_config1, reg_config2; 972 u8 reg_alert_status, reg_alert_mask; 973 int address = client->addr; 974 975 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 976 return -ENODEV; 977 978 man_id = i2c_smbus_read_byte_data(client, LM63_REG_MAN_ID); 979 chip_id = i2c_smbus_read_byte_data(client, LM63_REG_CHIP_ID); 980 981 reg_config1 = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1); 982 reg_config2 = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG2); 983 reg_alert_status = i2c_smbus_read_byte_data(client, 984 LM63_REG_ALERT_STATUS); 985 reg_alert_mask = i2c_smbus_read_byte_data(client, LM63_REG_ALERT_MASK); 986 987 if (man_id != 0x01 /* National Semiconductor */ 988 || (reg_config1 & 0x18) != 0x00 989 || (reg_config2 & 0xF8) != 0x00 990 || (reg_alert_status & 0x20) != 0x00 991 || (reg_alert_mask & 0xA4) != 0xA4) { 992 dev_dbg(&adapter->dev, 993 "Unsupported chip (man_id=0x%02X, chip_id=0x%02X)\n", 994 man_id, chip_id); 995 return -ENODEV; 996 } 997 998 if (chip_id == 0x41 && address == 0x4c) 999 strlcpy(info->type, "lm63", I2C_NAME_SIZE); 1000 else if (chip_id == 0x51 && (address == 0x18 || address == 0x4e)) 1001 strlcpy(info->type, "lm64", I2C_NAME_SIZE); 1002 else if (chip_id == 0x49 && address == 0x4c) 1003 strlcpy(info->type, "lm96163", I2C_NAME_SIZE); 1004 else 1005 return -ENODEV; 1006 1007 return 0; 1008 } 1009 1010 /* 1011 * Ideally we shouldn't have to initialize anything, since the BIOS 1012 * should have taken care of everything 1013 */ 1014 static void lm63_init_client(struct lm63_data *data) 1015 { 1016 struct i2c_client *client = data->client; 1017 struct device *dev = &client->dev; 1018 u8 convrate; 1019 1020 data->config = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1); 1021 data->config_fan = i2c_smbus_read_byte_data(client, 1022 LM63_REG_CONFIG_FAN); 1023 1024 /* Start converting if needed */ 1025 if (data->config & 0x40) { /* standby */ 1026 dev_dbg(dev, "Switching to operational mode\n"); 1027 data->config &= 0xA7; 1028 i2c_smbus_write_byte_data(client, LM63_REG_CONFIG1, 1029 data->config); 1030 } 1031 /* Tachometer is always enabled on LM64 */ 1032 if (data->kind == lm64) 1033 data->config |= 0x04; 1034 1035 /* We may need pwm1_freq before ever updating the client data */ 1036 data->pwm1_freq = i2c_smbus_read_byte_data(client, LM63_REG_PWM_FREQ); 1037 if (data->pwm1_freq == 0) 1038 data->pwm1_freq = 1; 1039 1040 switch (data->kind) { 1041 case lm63: 1042 case lm64: 1043 data->max_convrate_hz = LM63_MAX_CONVRATE_HZ; 1044 data->lut_size = 8; 1045 break; 1046 case lm96163: 1047 data->max_convrate_hz = LM96163_MAX_CONVRATE_HZ; 1048 data->lut_size = 12; 1049 data->trutherm 1050 = i2c_smbus_read_byte_data(client, 1051 LM96163_REG_TRUTHERM) & 0x02; 1052 break; 1053 } 1054 convrate = i2c_smbus_read_byte_data(client, LM63_REG_CONVRATE); 1055 if (unlikely(convrate > LM63_MAX_CONVRATE)) 1056 convrate = LM63_MAX_CONVRATE; 1057 data->update_interval = UPDATE_INTERVAL(data->max_convrate_hz, 1058 convrate); 1059 1060 /* 1061 * For LM96163, check if high resolution PWM 1062 * and unsigned temperature format is enabled. 1063 */ 1064 if (data->kind == lm96163) { 1065 u8 config_enhanced 1066 = i2c_smbus_read_byte_data(client, 1067 LM96163_REG_CONFIG_ENHANCED); 1068 if (config_enhanced & 0x20) 1069 data->lut_temp_highres = true; 1070 if ((config_enhanced & 0x10) 1071 && !(data->config_fan & 0x08) && data->pwm1_freq == 8) 1072 data->pwm_highres = true; 1073 if (config_enhanced & 0x08) 1074 data->remote_unsigned = true; 1075 } 1076 1077 /* Show some debug info about the LM63 configuration */ 1078 if (data->kind == lm63) 1079 dev_dbg(dev, "Alert/tach pin configured for %s\n", 1080 (data->config & 0x04) ? "tachometer input" : 1081 "alert output"); 1082 dev_dbg(dev, "PWM clock %s kHz, output frequency %u Hz\n", 1083 (data->config_fan & 0x08) ? "1.4" : "360", 1084 ((data->config_fan & 0x08) ? 700 : 180000) / data->pwm1_freq); 1085 dev_dbg(dev, "PWM output active %s, %s mode\n", 1086 (data->config_fan & 0x10) ? "low" : "high", 1087 (data->config_fan & 0x20) ? "manual" : "auto"); 1088 } 1089 1090 static int lm63_probe(struct i2c_client *client, 1091 const struct i2c_device_id *id) 1092 { 1093 struct device *dev = &client->dev; 1094 struct device *hwmon_dev; 1095 struct lm63_data *data; 1096 int groups = 0; 1097 1098 data = devm_kzalloc(dev, sizeof(struct lm63_data), GFP_KERNEL); 1099 if (!data) 1100 return -ENOMEM; 1101 1102 data->client = client; 1103 mutex_init(&data->update_lock); 1104 1105 /* Set the device type */ 1106 if (client->dev.of_node) 1107 data->kind = (enum chips)of_device_get_match_data(&client->dev); 1108 else 1109 data->kind = id->driver_data; 1110 if (data->kind == lm64) 1111 data->temp2_offset = 16000; 1112 1113 /* Initialize chip */ 1114 lm63_init_client(data); 1115 1116 /* Register sysfs hooks */ 1117 data->groups[groups++] = &lm63_group; 1118 if (data->config & 0x04) /* tachometer enabled */ 1119 data->groups[groups++] = &lm63_group_fan1; 1120 1121 if (data->kind == lm96163) { 1122 data->groups[groups++] = &lm63_group_temp2_type; 1123 data->groups[groups++] = &lm63_group_extra_lut; 1124 } 1125 1126 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, 1127 data, data->groups); 1128 return PTR_ERR_OR_ZERO(hwmon_dev); 1129 } 1130 1131 /* 1132 * Driver data (common to all clients) 1133 */ 1134 1135 static const struct i2c_device_id lm63_id[] = { 1136 { "lm63", lm63 }, 1137 { "lm64", lm64 }, 1138 { "lm96163", lm96163 }, 1139 { } 1140 }; 1141 MODULE_DEVICE_TABLE(i2c, lm63_id); 1142 1143 static const struct of_device_id __maybe_unused lm63_of_match[] = { 1144 { 1145 .compatible = "national,lm63", 1146 .data = (void *)lm63 1147 }, 1148 { 1149 .compatible = "national,lm64", 1150 .data = (void *)lm64 1151 }, 1152 { 1153 .compatible = "national,lm96163", 1154 .data = (void *)lm96163 1155 }, 1156 { }, 1157 }; 1158 MODULE_DEVICE_TABLE(of, lm63_of_match); 1159 1160 static struct i2c_driver lm63_driver = { 1161 .class = I2C_CLASS_HWMON, 1162 .driver = { 1163 .name = "lm63", 1164 .of_match_table = of_match_ptr(lm63_of_match), 1165 }, 1166 .probe = lm63_probe, 1167 .id_table = lm63_id, 1168 .detect = lm63_detect, 1169 .address_list = normal_i2c, 1170 }; 1171 1172 module_i2c_driver(lm63_driver); 1173 1174 MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>"); 1175 MODULE_DESCRIPTION("LM63 driver"); 1176 MODULE_LICENSE("GPL"); 1177