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.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 bool valid; /* false 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 = true; 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 int fan; 337 338 mutex_lock(&data->update_lock); 339 fan = FAN_FROM_REG(data->fan[attr->index]); 340 mutex_unlock(&data->update_lock); 341 342 return sprintf(buf, "%d\n", fan); 343 } 344 345 static ssize_t set_fan(struct device *dev, struct device_attribute *dummy, 346 const char *buf, size_t count) 347 { 348 struct lm63_data *data = dev_get_drvdata(dev); 349 struct i2c_client *client = data->client; 350 unsigned long val; 351 int err; 352 353 err = kstrtoul(buf, 10, &val); 354 if (err) 355 return err; 356 357 mutex_lock(&data->update_lock); 358 data->fan[1] = FAN_TO_REG(val); 359 i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_LSB, 360 data->fan[1] & 0xFF); 361 i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_MSB, 362 data->fan[1] >> 8); 363 mutex_unlock(&data->update_lock); 364 return count; 365 } 366 367 static ssize_t show_pwm1(struct device *dev, struct device_attribute *devattr, 368 char *buf) 369 { 370 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 371 struct lm63_data *data = lm63_update_device(dev); 372 int nr = attr->index; 373 int pwm; 374 375 mutex_lock(&data->update_lock); 376 if (data->pwm_highres) 377 pwm = data->pwm1[nr]; 378 else 379 pwm = data->pwm1[nr] >= 2 * data->pwm1_freq ? 380 255 : (data->pwm1[nr] * 255 + data->pwm1_freq) / 381 (2 * data->pwm1_freq); 382 mutex_unlock(&data->update_lock); 383 384 return sprintf(buf, "%d\n", pwm); 385 } 386 387 static ssize_t set_pwm1(struct device *dev, struct device_attribute *devattr, 388 const char *buf, size_t count) 389 { 390 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 391 struct lm63_data *data = dev_get_drvdata(dev); 392 struct i2c_client *client = data->client; 393 int nr = attr->index; 394 unsigned long val; 395 int err; 396 u8 reg; 397 398 if (!(data->config_fan & 0x20)) /* register is read-only */ 399 return -EPERM; 400 401 err = kstrtoul(buf, 10, &val); 402 if (err) 403 return err; 404 405 reg = nr ? LM63_REG_LUT_PWM(nr - 1) : LM63_REG_PWM_VALUE; 406 val = clamp_val(val, 0, 255); 407 408 mutex_lock(&data->update_lock); 409 data->pwm1[nr] = data->pwm_highres ? val : 410 (val * data->pwm1_freq * 2 + 127) / 255; 411 i2c_smbus_write_byte_data(client, reg, data->pwm1[nr]); 412 mutex_unlock(&data->update_lock); 413 return count; 414 } 415 416 static ssize_t pwm1_enable_show(struct device *dev, 417 struct device_attribute *dummy, char *buf) 418 { 419 struct lm63_data *data = lm63_update_device(dev); 420 return sprintf(buf, "%d\n", data->config_fan & 0x20 ? 1 : 2); 421 } 422 423 static ssize_t pwm1_enable_store(struct device *dev, 424 struct device_attribute *dummy, 425 const char *buf, size_t count) 426 { 427 struct lm63_data *data = dev_get_drvdata(dev); 428 struct i2c_client *client = data->client; 429 unsigned long val; 430 int err; 431 432 err = kstrtoul(buf, 10, &val); 433 if (err) 434 return err; 435 if (val < 1 || val > 2) 436 return -EINVAL; 437 438 /* 439 * Only let the user switch to automatic mode if the lookup table 440 * looks sane. 441 */ 442 if (val == 2 && lm63_lut_looks_bad(dev, data)) 443 return -EPERM; 444 445 mutex_lock(&data->update_lock); 446 data->config_fan = i2c_smbus_read_byte_data(client, 447 LM63_REG_CONFIG_FAN); 448 if (val == 1) 449 data->config_fan |= 0x20; 450 else 451 data->config_fan &= ~0x20; 452 i2c_smbus_write_byte_data(client, LM63_REG_CONFIG_FAN, 453 data->config_fan); 454 mutex_unlock(&data->update_lock); 455 return count; 456 } 457 458 /* 459 * There are 8bit registers for both local(temp1) and remote(temp2) sensor. 460 * For remote sensor registers temp2_offset has to be considered, 461 * for local sensor it must not. 462 * So we need separate 8bit accessors for local and remote sensor. 463 */ 464 static ssize_t show_local_temp8(struct device *dev, 465 struct device_attribute *devattr, 466 char *buf) 467 { 468 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 469 struct lm63_data *data = lm63_update_device(dev); 470 return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[attr->index])); 471 } 472 473 static ssize_t show_remote_temp8(struct device *dev, 474 struct device_attribute *devattr, 475 char *buf) 476 { 477 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 478 struct lm63_data *data = lm63_update_device(dev); 479 return sprintf(buf, "%d\n", temp8_from_reg(data, attr->index) 480 + data->temp2_offset); 481 } 482 483 static ssize_t show_lut_temp(struct device *dev, 484 struct device_attribute *devattr, 485 char *buf) 486 { 487 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 488 struct lm63_data *data = lm63_update_device(dev); 489 return sprintf(buf, "%d\n", lut_temp_from_reg(data, attr->index) 490 + data->temp2_offset); 491 } 492 493 static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr, 494 const char *buf, size_t count) 495 { 496 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 497 struct lm63_data *data = dev_get_drvdata(dev); 498 struct i2c_client *client = data->client; 499 int nr = attr->index; 500 long val; 501 int err; 502 int temp; 503 u8 reg; 504 505 err = kstrtol(buf, 10, &val); 506 if (err) 507 return err; 508 509 mutex_lock(&data->update_lock); 510 switch (nr) { 511 case 2: 512 reg = LM63_REG_REMOTE_TCRIT; 513 if (data->remote_unsigned) 514 temp = TEMP8U_TO_REG(val - data->temp2_offset); 515 else 516 temp = TEMP8_TO_REG(val - data->temp2_offset); 517 break; 518 case 1: 519 reg = LM63_REG_LOCAL_HIGH; 520 temp = TEMP8_TO_REG(val); 521 break; 522 default: /* lookup table */ 523 reg = LM63_REG_LUT_TEMP(nr - 3); 524 temp = lut_temp_to_reg(data, val); 525 } 526 data->temp8[nr] = temp; 527 i2c_smbus_write_byte_data(client, reg, temp); 528 mutex_unlock(&data->update_lock); 529 return count; 530 } 531 532 static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr, 533 char *buf) 534 { 535 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 536 struct lm63_data *data = lm63_update_device(dev); 537 int nr = attr->index; 538 int temp; 539 540 mutex_lock(&data->update_lock); 541 if (!nr) { 542 /* 543 * Use unsigned temperature unless its value is zero. 544 * If it is zero, use signed temperature. 545 */ 546 if (data->temp11u) 547 temp = TEMP11_FROM_REG(data->temp11u); 548 else 549 temp = TEMP11_FROM_REG(data->temp11[nr]); 550 } else { 551 if (data->remote_unsigned && nr == 2) 552 temp = TEMP11_FROM_REG((u16)data->temp11[nr]); 553 else 554 temp = TEMP11_FROM_REG(data->temp11[nr]); 555 } 556 temp += data->temp2_offset; 557 mutex_unlock(&data->update_lock); 558 559 return sprintf(buf, "%d\n", temp); 560 } 561 562 static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr, 563 const char *buf, size_t count) 564 { 565 static const u8 reg[6] = { 566 LM63_REG_REMOTE_LOW_MSB, 567 LM63_REG_REMOTE_LOW_LSB, 568 LM63_REG_REMOTE_HIGH_MSB, 569 LM63_REG_REMOTE_HIGH_LSB, 570 LM63_REG_REMOTE_OFFSET_MSB, 571 LM63_REG_REMOTE_OFFSET_LSB, 572 }; 573 574 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 575 struct lm63_data *data = dev_get_drvdata(dev); 576 struct i2c_client *client = data->client; 577 long val; 578 int err; 579 int nr = attr->index; 580 581 err = kstrtol(buf, 10, &val); 582 if (err) 583 return err; 584 585 mutex_lock(&data->update_lock); 586 if (data->remote_unsigned && nr == 2) 587 data->temp11[nr] = TEMP11U_TO_REG(val - data->temp2_offset); 588 else 589 data->temp11[nr] = TEMP11_TO_REG(val - data->temp2_offset); 590 591 i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2], 592 data->temp11[nr] >> 8); 593 i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1], 594 data->temp11[nr] & 0xff); 595 mutex_unlock(&data->update_lock); 596 return count; 597 } 598 599 /* 600 * Hysteresis register holds a relative value, while we want to present 601 * an absolute to user-space 602 */ 603 static ssize_t temp2_crit_hyst_show(struct device *dev, 604 struct device_attribute *dummy, char *buf) 605 { 606 struct lm63_data *data = lm63_update_device(dev); 607 int temp; 608 609 mutex_lock(&data->update_lock); 610 temp = temp8_from_reg(data, 2) + data->temp2_offset 611 - TEMP8_FROM_REG(data->temp2_crit_hyst); 612 mutex_unlock(&data->update_lock); 613 614 return sprintf(buf, "%d\n", temp); 615 } 616 617 static ssize_t show_lut_temp_hyst(struct device *dev, 618 struct device_attribute *devattr, char *buf) 619 { 620 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 621 struct lm63_data *data = lm63_update_device(dev); 622 int temp; 623 624 mutex_lock(&data->update_lock); 625 temp = lut_temp_from_reg(data, attr->index) + data->temp2_offset 626 - TEMP8_FROM_REG(data->lut_temp_hyst); 627 mutex_unlock(&data->update_lock); 628 629 return sprintf(buf, "%d\n", temp); 630 } 631 632 /* 633 * And now the other way around, user-space provides an absolute 634 * hysteresis value and we have to store a relative one 635 */ 636 static ssize_t temp2_crit_hyst_store(struct device *dev, 637 struct device_attribute *dummy, 638 const char *buf, size_t count) 639 { 640 struct lm63_data *data = lm63_update_device(dev); 641 struct i2c_client *client = data->client; 642 long val; 643 int err; 644 long hyst; 645 646 err = kstrtol(buf, 10, &val); 647 if (err) 648 return err; 649 650 mutex_lock(&data->update_lock); 651 hyst = temp8_from_reg(data, 2) + data->temp2_offset - val; 652 i2c_smbus_write_byte_data(client, LM63_REG_REMOTE_TCRIT_HYST, 653 HYST_TO_REG(hyst)); 654 mutex_unlock(&data->update_lock); 655 return count; 656 } 657 658 /* 659 * Set conversion rate. 660 * client->update_lock must be held when calling this function. 661 */ 662 static void lm63_set_convrate(struct lm63_data *data, unsigned int interval) 663 { 664 struct i2c_client *client = data->client; 665 unsigned int update_interval; 666 int i; 667 668 /* Shift calculations to avoid rounding errors */ 669 interval <<= 6; 670 671 /* find the nearest update rate */ 672 update_interval = (1 << (LM63_MAX_CONVRATE + 6)) * 1000 673 / data->max_convrate_hz; 674 for (i = 0; i < LM63_MAX_CONVRATE; i++, update_interval >>= 1) 675 if (interval >= update_interval * 3 / 4) 676 break; 677 678 i2c_smbus_write_byte_data(client, LM63_REG_CONVRATE, i); 679 data->update_interval = UPDATE_INTERVAL(data->max_convrate_hz, i); 680 } 681 682 static ssize_t update_interval_show(struct device *dev, 683 struct device_attribute *attr, char *buf) 684 { 685 struct lm63_data *data = dev_get_drvdata(dev); 686 687 return sprintf(buf, "%u\n", data->update_interval); 688 } 689 690 static ssize_t update_interval_store(struct device *dev, 691 struct device_attribute *attr, 692 const char *buf, size_t count) 693 { 694 struct lm63_data *data = dev_get_drvdata(dev); 695 unsigned long val; 696 int err; 697 698 err = kstrtoul(buf, 10, &val); 699 if (err) 700 return err; 701 702 mutex_lock(&data->update_lock); 703 lm63_set_convrate(data, clamp_val(val, 0, 100000)); 704 mutex_unlock(&data->update_lock); 705 706 return count; 707 } 708 709 static ssize_t temp2_type_show(struct device *dev, 710 struct device_attribute *attr, char *buf) 711 { 712 struct lm63_data *data = dev_get_drvdata(dev); 713 714 return sprintf(buf, data->trutherm ? "1\n" : "2\n"); 715 } 716 717 static ssize_t temp2_type_store(struct device *dev, 718 struct device_attribute *attr, 719 const char *buf, size_t count) 720 { 721 struct lm63_data *data = dev_get_drvdata(dev); 722 struct i2c_client *client = data->client; 723 unsigned long val; 724 int ret; 725 u8 reg; 726 727 ret = kstrtoul(buf, 10, &val); 728 if (ret < 0) 729 return ret; 730 if (val != 1 && val != 2) 731 return -EINVAL; 732 733 mutex_lock(&data->update_lock); 734 data->trutherm = val == 1; 735 reg = i2c_smbus_read_byte_data(client, LM96163_REG_TRUTHERM) & ~0x02; 736 i2c_smbus_write_byte_data(client, LM96163_REG_TRUTHERM, 737 reg | (data->trutherm ? 0x02 : 0x00)); 738 data->valid = false; 739 mutex_unlock(&data->update_lock); 740 741 return count; 742 } 743 744 static ssize_t alarms_show(struct device *dev, struct device_attribute *dummy, 745 char *buf) 746 { 747 struct lm63_data *data = lm63_update_device(dev); 748 return sprintf(buf, "%u\n", data->alarms); 749 } 750 751 static ssize_t show_alarm(struct device *dev, struct device_attribute *devattr, 752 char *buf) 753 { 754 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 755 struct lm63_data *data = lm63_update_device(dev); 756 int bitnr = attr->index; 757 758 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 759 } 760 761 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0); 762 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan, 763 set_fan, 1); 764 765 static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm1, set_pwm1, 0); 766 static DEVICE_ATTR_RW(pwm1_enable); 767 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IWUSR | S_IRUGO, 768 show_pwm1, set_pwm1, 1); 769 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp, S_IWUSR | S_IRUGO, 770 show_lut_temp, set_temp8, 3); 771 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp_hyst, S_IRUGO, 772 show_lut_temp_hyst, NULL, 3); 773 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO, 774 show_pwm1, set_pwm1, 2); 775 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp, S_IWUSR | S_IRUGO, 776 show_lut_temp, set_temp8, 4); 777 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp_hyst, S_IRUGO, 778 show_lut_temp_hyst, NULL, 4); 779 static SENSOR_DEVICE_ATTR(pwm1_auto_point3_pwm, S_IWUSR | S_IRUGO, 780 show_pwm1, set_pwm1, 3); 781 static SENSOR_DEVICE_ATTR(pwm1_auto_point3_temp, S_IWUSR | S_IRUGO, 782 show_lut_temp, set_temp8, 5); 783 static SENSOR_DEVICE_ATTR(pwm1_auto_point3_temp_hyst, S_IRUGO, 784 show_lut_temp_hyst, NULL, 5); 785 static SENSOR_DEVICE_ATTR(pwm1_auto_point4_pwm, S_IWUSR | S_IRUGO, 786 show_pwm1, set_pwm1, 4); 787 static SENSOR_DEVICE_ATTR(pwm1_auto_point4_temp, S_IWUSR | S_IRUGO, 788 show_lut_temp, set_temp8, 6); 789 static SENSOR_DEVICE_ATTR(pwm1_auto_point4_temp_hyst, S_IRUGO, 790 show_lut_temp_hyst, NULL, 6); 791 static SENSOR_DEVICE_ATTR(pwm1_auto_point5_pwm, S_IWUSR | S_IRUGO, 792 show_pwm1, set_pwm1, 5); 793 static SENSOR_DEVICE_ATTR(pwm1_auto_point5_temp, S_IWUSR | S_IRUGO, 794 show_lut_temp, set_temp8, 7); 795 static SENSOR_DEVICE_ATTR(pwm1_auto_point5_temp_hyst, S_IRUGO, 796 show_lut_temp_hyst, NULL, 7); 797 static SENSOR_DEVICE_ATTR(pwm1_auto_point6_pwm, S_IWUSR | S_IRUGO, 798 show_pwm1, set_pwm1, 6); 799 static SENSOR_DEVICE_ATTR(pwm1_auto_point6_temp, S_IWUSR | S_IRUGO, 800 show_lut_temp, set_temp8, 8); 801 static SENSOR_DEVICE_ATTR(pwm1_auto_point6_temp_hyst, S_IRUGO, 802 show_lut_temp_hyst, NULL, 8); 803 static SENSOR_DEVICE_ATTR(pwm1_auto_point7_pwm, S_IWUSR | S_IRUGO, 804 show_pwm1, set_pwm1, 7); 805 static SENSOR_DEVICE_ATTR(pwm1_auto_point7_temp, S_IWUSR | S_IRUGO, 806 show_lut_temp, set_temp8, 9); 807 static SENSOR_DEVICE_ATTR(pwm1_auto_point7_temp_hyst, S_IRUGO, 808 show_lut_temp_hyst, NULL, 9); 809 static SENSOR_DEVICE_ATTR(pwm1_auto_point8_pwm, S_IWUSR | S_IRUGO, 810 show_pwm1, set_pwm1, 8); 811 static SENSOR_DEVICE_ATTR(pwm1_auto_point8_temp, S_IWUSR | S_IRUGO, 812 show_lut_temp, set_temp8, 10); 813 static SENSOR_DEVICE_ATTR(pwm1_auto_point8_temp_hyst, S_IRUGO, 814 show_lut_temp_hyst, NULL, 10); 815 static SENSOR_DEVICE_ATTR(pwm1_auto_point9_pwm, S_IWUSR | S_IRUGO, 816 show_pwm1, set_pwm1, 9); 817 static SENSOR_DEVICE_ATTR(pwm1_auto_point9_temp, S_IWUSR | S_IRUGO, 818 show_lut_temp, set_temp8, 11); 819 static SENSOR_DEVICE_ATTR(pwm1_auto_point9_temp_hyst, S_IRUGO, 820 show_lut_temp_hyst, NULL, 11); 821 static SENSOR_DEVICE_ATTR(pwm1_auto_point10_pwm, S_IWUSR | S_IRUGO, 822 show_pwm1, set_pwm1, 10); 823 static SENSOR_DEVICE_ATTR(pwm1_auto_point10_temp, S_IWUSR | S_IRUGO, 824 show_lut_temp, set_temp8, 12); 825 static SENSOR_DEVICE_ATTR(pwm1_auto_point10_temp_hyst, S_IRUGO, 826 show_lut_temp_hyst, NULL, 12); 827 static SENSOR_DEVICE_ATTR(pwm1_auto_point11_pwm, S_IWUSR | S_IRUGO, 828 show_pwm1, set_pwm1, 11); 829 static SENSOR_DEVICE_ATTR(pwm1_auto_point11_temp, S_IWUSR | S_IRUGO, 830 show_lut_temp, set_temp8, 13); 831 static SENSOR_DEVICE_ATTR(pwm1_auto_point11_temp_hyst, S_IRUGO, 832 show_lut_temp_hyst, NULL, 13); 833 static SENSOR_DEVICE_ATTR(pwm1_auto_point12_pwm, S_IWUSR | S_IRUGO, 834 show_pwm1, set_pwm1, 12); 835 static SENSOR_DEVICE_ATTR(pwm1_auto_point12_temp, S_IWUSR | S_IRUGO, 836 show_lut_temp, set_temp8, 14); 837 static SENSOR_DEVICE_ATTR(pwm1_auto_point12_temp_hyst, S_IRUGO, 838 show_lut_temp_hyst, NULL, 14); 839 840 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_local_temp8, NULL, 0); 841 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_local_temp8, 842 set_temp8, 1); 843 844 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0); 845 static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11, 846 set_temp11, 1); 847 static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11, 848 set_temp11, 2); 849 static SENSOR_DEVICE_ATTR(temp2_offset, S_IWUSR | S_IRUGO, show_temp11, 850 set_temp11, 3); 851 static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_remote_temp8, 852 set_temp8, 2); 853 static DEVICE_ATTR_RW(temp2_crit_hyst); 854 855 static DEVICE_ATTR_RW(temp2_type); 856 857 /* Individual alarm files */ 858 static SENSOR_DEVICE_ATTR(fan1_min_alarm, S_IRUGO, show_alarm, NULL, 0); 859 static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1); 860 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2); 861 static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3); 862 static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4); 863 static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6); 864 /* Raw alarm file for compatibility */ 865 static DEVICE_ATTR_RO(alarms); 866 867 static DEVICE_ATTR_RW(update_interval); 868 869 static struct attribute *lm63_attributes[] = { 870 &sensor_dev_attr_pwm1.dev_attr.attr, 871 &dev_attr_pwm1_enable.attr, 872 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr, 873 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr, 874 &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr, 875 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr, 876 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr, 877 &sensor_dev_attr_pwm1_auto_point2_temp_hyst.dev_attr.attr, 878 &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr, 879 &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr, 880 &sensor_dev_attr_pwm1_auto_point3_temp_hyst.dev_attr.attr, 881 &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr, 882 &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr, 883 &sensor_dev_attr_pwm1_auto_point4_temp_hyst.dev_attr.attr, 884 &sensor_dev_attr_pwm1_auto_point5_pwm.dev_attr.attr, 885 &sensor_dev_attr_pwm1_auto_point5_temp.dev_attr.attr, 886 &sensor_dev_attr_pwm1_auto_point5_temp_hyst.dev_attr.attr, 887 &sensor_dev_attr_pwm1_auto_point6_pwm.dev_attr.attr, 888 &sensor_dev_attr_pwm1_auto_point6_temp.dev_attr.attr, 889 &sensor_dev_attr_pwm1_auto_point6_temp_hyst.dev_attr.attr, 890 &sensor_dev_attr_pwm1_auto_point7_pwm.dev_attr.attr, 891 &sensor_dev_attr_pwm1_auto_point7_temp.dev_attr.attr, 892 &sensor_dev_attr_pwm1_auto_point7_temp_hyst.dev_attr.attr, 893 &sensor_dev_attr_pwm1_auto_point8_pwm.dev_attr.attr, 894 &sensor_dev_attr_pwm1_auto_point8_temp.dev_attr.attr, 895 &sensor_dev_attr_pwm1_auto_point8_temp_hyst.dev_attr.attr, 896 897 &sensor_dev_attr_temp1_input.dev_attr.attr, 898 &sensor_dev_attr_temp2_input.dev_attr.attr, 899 &sensor_dev_attr_temp2_min.dev_attr.attr, 900 &sensor_dev_attr_temp1_max.dev_attr.attr, 901 &sensor_dev_attr_temp2_max.dev_attr.attr, 902 &sensor_dev_attr_temp2_offset.dev_attr.attr, 903 &sensor_dev_attr_temp2_crit.dev_attr.attr, 904 &dev_attr_temp2_crit_hyst.attr, 905 906 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, 907 &sensor_dev_attr_temp2_fault.dev_attr.attr, 908 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr, 909 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, 910 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, 911 &dev_attr_alarms.attr, 912 &dev_attr_update_interval.attr, 913 NULL 914 }; 915 916 static struct attribute *lm63_attributes_temp2_type[] = { 917 &dev_attr_temp2_type.attr, 918 NULL 919 }; 920 921 static const struct attribute_group lm63_group_temp2_type = { 922 .attrs = lm63_attributes_temp2_type, 923 }; 924 925 static struct attribute *lm63_attributes_extra_lut[] = { 926 &sensor_dev_attr_pwm1_auto_point9_pwm.dev_attr.attr, 927 &sensor_dev_attr_pwm1_auto_point9_temp.dev_attr.attr, 928 &sensor_dev_attr_pwm1_auto_point9_temp_hyst.dev_attr.attr, 929 &sensor_dev_attr_pwm1_auto_point10_pwm.dev_attr.attr, 930 &sensor_dev_attr_pwm1_auto_point10_temp.dev_attr.attr, 931 &sensor_dev_attr_pwm1_auto_point10_temp_hyst.dev_attr.attr, 932 &sensor_dev_attr_pwm1_auto_point11_pwm.dev_attr.attr, 933 &sensor_dev_attr_pwm1_auto_point11_temp.dev_attr.attr, 934 &sensor_dev_attr_pwm1_auto_point11_temp_hyst.dev_attr.attr, 935 &sensor_dev_attr_pwm1_auto_point12_pwm.dev_attr.attr, 936 &sensor_dev_attr_pwm1_auto_point12_temp.dev_attr.attr, 937 &sensor_dev_attr_pwm1_auto_point12_temp_hyst.dev_attr.attr, 938 NULL 939 }; 940 941 static const struct attribute_group lm63_group_extra_lut = { 942 .attrs = lm63_attributes_extra_lut, 943 }; 944 945 /* 946 * On LM63, temp2_crit can be set only once, which should be job 947 * of the bootloader. 948 * On LM64, temp2_crit can always be set. 949 * On LM96163, temp2_crit can be set if bit 1 of the configuration 950 * register is true. 951 */ 952 static umode_t lm63_attribute_mode(struct kobject *kobj, 953 struct attribute *attr, int index) 954 { 955 struct device *dev = kobj_to_dev(kobj); 956 struct lm63_data *data = dev_get_drvdata(dev); 957 958 if (attr == &sensor_dev_attr_temp2_crit.dev_attr.attr 959 && (data->kind == lm64 || 960 (data->kind == lm96163 && (data->config & 0x02)))) 961 return attr->mode | S_IWUSR; 962 963 return attr->mode; 964 } 965 966 static const struct attribute_group lm63_group = { 967 .is_visible = lm63_attribute_mode, 968 .attrs = lm63_attributes, 969 }; 970 971 static struct attribute *lm63_attributes_fan1[] = { 972 &sensor_dev_attr_fan1_input.dev_attr.attr, 973 &sensor_dev_attr_fan1_min.dev_attr.attr, 974 975 &sensor_dev_attr_fan1_min_alarm.dev_attr.attr, 976 NULL 977 }; 978 979 static const struct attribute_group lm63_group_fan1 = { 980 .attrs = lm63_attributes_fan1, 981 }; 982 983 /* 984 * Real code 985 */ 986 987 /* Return 0 if detection is successful, -ENODEV otherwise */ 988 static int lm63_detect(struct i2c_client *client, 989 struct i2c_board_info *info) 990 { 991 struct i2c_adapter *adapter = client->adapter; 992 u8 man_id, chip_id, reg_config1, reg_config2; 993 u8 reg_alert_status, reg_alert_mask; 994 int address = client->addr; 995 996 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 997 return -ENODEV; 998 999 man_id = i2c_smbus_read_byte_data(client, LM63_REG_MAN_ID); 1000 chip_id = i2c_smbus_read_byte_data(client, LM63_REG_CHIP_ID); 1001 1002 reg_config1 = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1); 1003 reg_config2 = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG2); 1004 reg_alert_status = i2c_smbus_read_byte_data(client, 1005 LM63_REG_ALERT_STATUS); 1006 reg_alert_mask = i2c_smbus_read_byte_data(client, LM63_REG_ALERT_MASK); 1007 1008 if (man_id != 0x01 /* National Semiconductor */ 1009 || (reg_config1 & 0x18) != 0x00 1010 || (reg_config2 & 0xF8) != 0x00 1011 || (reg_alert_status & 0x20) != 0x00 1012 || (reg_alert_mask & 0xA4) != 0xA4) { 1013 dev_dbg(&adapter->dev, 1014 "Unsupported chip (man_id=0x%02X, chip_id=0x%02X)\n", 1015 man_id, chip_id); 1016 return -ENODEV; 1017 } 1018 1019 if (chip_id == 0x41 && address == 0x4c) 1020 strscpy(info->type, "lm63", I2C_NAME_SIZE); 1021 else if (chip_id == 0x51 && (address == 0x18 || address == 0x4e)) 1022 strscpy(info->type, "lm64", I2C_NAME_SIZE); 1023 else if (chip_id == 0x49 && address == 0x4c) 1024 strscpy(info->type, "lm96163", I2C_NAME_SIZE); 1025 else 1026 return -ENODEV; 1027 1028 return 0; 1029 } 1030 1031 /* 1032 * Ideally we shouldn't have to initialize anything, since the BIOS 1033 * should have taken care of everything 1034 */ 1035 static void lm63_init_client(struct lm63_data *data) 1036 { 1037 struct i2c_client *client = data->client; 1038 struct device *dev = &client->dev; 1039 u8 convrate; 1040 1041 data->config = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1); 1042 data->config_fan = i2c_smbus_read_byte_data(client, 1043 LM63_REG_CONFIG_FAN); 1044 1045 /* Start converting if needed */ 1046 if (data->config & 0x40) { /* standby */ 1047 dev_dbg(dev, "Switching to operational mode\n"); 1048 data->config &= 0xA7; 1049 i2c_smbus_write_byte_data(client, LM63_REG_CONFIG1, 1050 data->config); 1051 } 1052 /* Tachometer is always enabled on LM64 */ 1053 if (data->kind == lm64) 1054 data->config |= 0x04; 1055 1056 /* We may need pwm1_freq before ever updating the client data */ 1057 data->pwm1_freq = i2c_smbus_read_byte_data(client, LM63_REG_PWM_FREQ); 1058 if (data->pwm1_freq == 0) 1059 data->pwm1_freq = 1; 1060 1061 switch (data->kind) { 1062 case lm63: 1063 case lm64: 1064 data->max_convrate_hz = LM63_MAX_CONVRATE_HZ; 1065 data->lut_size = 8; 1066 break; 1067 case lm96163: 1068 data->max_convrate_hz = LM96163_MAX_CONVRATE_HZ; 1069 data->lut_size = 12; 1070 data->trutherm 1071 = i2c_smbus_read_byte_data(client, 1072 LM96163_REG_TRUTHERM) & 0x02; 1073 break; 1074 } 1075 convrate = i2c_smbus_read_byte_data(client, LM63_REG_CONVRATE); 1076 if (unlikely(convrate > LM63_MAX_CONVRATE)) 1077 convrate = LM63_MAX_CONVRATE; 1078 data->update_interval = UPDATE_INTERVAL(data->max_convrate_hz, 1079 convrate); 1080 1081 /* 1082 * For LM96163, check if high resolution PWM 1083 * and unsigned temperature format is enabled. 1084 */ 1085 if (data->kind == lm96163) { 1086 u8 config_enhanced 1087 = i2c_smbus_read_byte_data(client, 1088 LM96163_REG_CONFIG_ENHANCED); 1089 if (config_enhanced & 0x20) 1090 data->lut_temp_highres = true; 1091 if ((config_enhanced & 0x10) 1092 && !(data->config_fan & 0x08) && data->pwm1_freq == 8) 1093 data->pwm_highres = true; 1094 if (config_enhanced & 0x08) 1095 data->remote_unsigned = true; 1096 } 1097 1098 /* Show some debug info about the LM63 configuration */ 1099 if (data->kind == lm63) 1100 dev_dbg(dev, "Alert/tach pin configured for %s\n", 1101 (data->config & 0x04) ? "tachometer input" : 1102 "alert output"); 1103 dev_dbg(dev, "PWM clock %s kHz, output frequency %u Hz\n", 1104 (data->config_fan & 0x08) ? "1.4" : "360", 1105 ((data->config_fan & 0x08) ? 700 : 180000) / data->pwm1_freq); 1106 dev_dbg(dev, "PWM output active %s, %s mode\n", 1107 (data->config_fan & 0x10) ? "low" : "high", 1108 (data->config_fan & 0x20) ? "manual" : "auto"); 1109 } 1110 1111 static const struct i2c_device_id lm63_id[]; 1112 1113 static int lm63_probe(struct i2c_client *client) 1114 { 1115 struct device *dev = &client->dev; 1116 struct device *hwmon_dev; 1117 struct lm63_data *data; 1118 int groups = 0; 1119 1120 data = devm_kzalloc(dev, sizeof(struct lm63_data), GFP_KERNEL); 1121 if (!data) 1122 return -ENOMEM; 1123 1124 data->client = client; 1125 mutex_init(&data->update_lock); 1126 1127 /* Set the device type */ 1128 data->kind = (uintptr_t)i2c_get_match_data(client); 1129 if (data->kind == lm64) 1130 data->temp2_offset = 16000; 1131 1132 /* Initialize chip */ 1133 lm63_init_client(data); 1134 1135 /* Register sysfs hooks */ 1136 data->groups[groups++] = &lm63_group; 1137 if (data->config & 0x04) /* tachometer enabled */ 1138 data->groups[groups++] = &lm63_group_fan1; 1139 1140 if (data->kind == lm96163) { 1141 data->groups[groups++] = &lm63_group_temp2_type; 1142 data->groups[groups++] = &lm63_group_extra_lut; 1143 } 1144 1145 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, 1146 data, data->groups); 1147 return PTR_ERR_OR_ZERO(hwmon_dev); 1148 } 1149 1150 /* 1151 * Driver data (common to all clients) 1152 */ 1153 1154 static const struct i2c_device_id lm63_id[] = { 1155 { "lm63", lm63 }, 1156 { "lm64", lm64 }, 1157 { "lm96163", lm96163 }, 1158 { } 1159 }; 1160 MODULE_DEVICE_TABLE(i2c, lm63_id); 1161 1162 static const struct of_device_id __maybe_unused lm63_of_match[] = { 1163 { 1164 .compatible = "national,lm63", 1165 .data = (void *)lm63 1166 }, 1167 { 1168 .compatible = "national,lm64", 1169 .data = (void *)lm64 1170 }, 1171 { 1172 .compatible = "national,lm96163", 1173 .data = (void *)lm96163 1174 }, 1175 { }, 1176 }; 1177 MODULE_DEVICE_TABLE(of, lm63_of_match); 1178 1179 static struct i2c_driver lm63_driver = { 1180 .class = I2C_CLASS_HWMON, 1181 .driver = { 1182 .name = "lm63", 1183 .of_match_table = of_match_ptr(lm63_of_match), 1184 }, 1185 .probe = lm63_probe, 1186 .id_table = lm63_id, 1187 .detect = lm63_detect, 1188 .address_list = normal_i2c, 1189 }; 1190 1191 module_i2c_driver(lm63_driver); 1192 1193 MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>"); 1194 MODULE_DESCRIPTION("LM63 driver"); 1195 MODULE_LICENSE("GPL"); 1196