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_PWM_BASE_FAST_HZ 180000 96 #define LM63_PWM_BASE_SLOW_HZ 700 97 98 #define LM63_MAX_CONVRATE 9 99 100 #define LM63_MAX_CONVRATE_HZ 32 101 #define LM96163_MAX_CONVRATE_HZ 26 102 103 /* 104 * Conversions and various macros 105 * For tachometer counts, the LM63 uses 16-bit values. 106 * For local temperature and high limit, remote critical limit and hysteresis 107 * value, it uses signed 8-bit values with LSB = 1 degree Celsius. 108 * For remote temperature, low and high limits, it uses signed 11-bit values 109 * with LSB = 0.125 degree Celsius, left-justified in 16-bit registers. 110 * For LM64 the actual remote diode temperature is 16 degree Celsius higher 111 * than the register reading. Remote temperature setpoints have to be 112 * adapted accordingly. 113 */ 114 115 #define FAN_FROM_REG(reg) ((reg) == 0xFFFC || (reg) == 0 ? 0 : \ 116 5400000 / (reg)) 117 #define FAN_TO_REG(val) ((val) <= 82 ? 0xFFFC : \ 118 (5400000 / (val)) & 0xFFFC) 119 #define TEMP8_FROM_REG(reg) ((reg) * 1000) 120 #define TEMP8_TO_REG(val) DIV_ROUND_CLOSEST(clamp_val((val), -128000, \ 121 127000), 1000) 122 #define TEMP8U_TO_REG(val) DIV_ROUND_CLOSEST(clamp_val((val), 0, \ 123 255000), 1000) 124 #define TEMP11_FROM_REG(reg) ((reg) / 32 * 125) 125 #define TEMP11_TO_REG(val) (DIV_ROUND_CLOSEST(clamp_val((val), -128000, \ 126 127875), 125) * 32) 127 #define TEMP11U_TO_REG(val) (DIV_ROUND_CLOSEST(clamp_val((val), 0, \ 128 255875), 125) * 32) 129 #define HYST_TO_REG(val) DIV_ROUND_CLOSEST(clamp_val((val), 0, 127000), \ 130 1000) 131 132 #define UPDATE_INTERVAL(max, rate) \ 133 ((1000 << (LM63_MAX_CONVRATE - (rate))) / (max)) 134 135 enum chips { lm63, lm64, lm96163 }; 136 137 /* 138 * Client data (each client gets its own) 139 */ 140 141 struct lm63_data { 142 struct i2c_client *client; 143 struct mutex update_lock; 144 const struct attribute_group *groups[5]; 145 bool valid; /* false until following fields are valid */ 146 char lut_valid; /* zero until lut fields are valid */ 147 unsigned long last_updated; /* in jiffies */ 148 unsigned long lut_last_updated; /* in jiffies */ 149 enum chips kind; 150 int temp2_offset; 151 152 int update_interval; /* in milliseconds */ 153 int max_convrate_hz; 154 int lut_size; /* 8 or 12 */ 155 156 /* registers values */ 157 u8 config, config_fan; 158 u16 fan[2]; /* 0: input 159 1: low limit */ 160 u8 pwm1_freq; 161 u8 pwm1[13]; /* 0: current output 162 1-12: lookup table */ 163 s8 temp8[15]; /* 0: local input 164 1: local high limit 165 2: remote critical limit 166 3-14: lookup table */ 167 s16 temp11[4]; /* 0: remote input 168 1: remote low limit 169 2: remote high limit 170 3: remote offset */ 171 u16 temp11u; /* remote input (unsigned) */ 172 u8 temp2_crit_hyst; 173 u8 lut_temp_hyst; 174 u8 alarms; 175 bool pwm_highres; 176 bool lut_temp_highres; 177 bool remote_unsigned; /* true if unsigned remote upper limits */ 178 bool trutherm; 179 }; 180 181 static inline int temp8_from_reg(struct lm63_data *data, int nr) 182 { 183 if (data->remote_unsigned) 184 return TEMP8_FROM_REG((u8)data->temp8[nr]); 185 return TEMP8_FROM_REG(data->temp8[nr]); 186 } 187 188 static inline int lut_temp_from_reg(struct lm63_data *data, int nr) 189 { 190 return data->temp8[nr] * (data->lut_temp_highres ? 500 : 1000); 191 } 192 193 static inline int lut_temp_to_reg(struct lm63_data *data, long val) 194 { 195 val -= data->temp2_offset; 196 if (data->lut_temp_highres) 197 return DIV_ROUND_CLOSEST(clamp_val(val, 0, 127500), 500); 198 else 199 return DIV_ROUND_CLOSEST(clamp_val(val, 0, 127000), 1000); 200 } 201 202 /* 203 * Update the lookup table register cache. 204 * client->update_lock must be held when calling this function. 205 */ 206 static void lm63_update_lut(struct lm63_data *data) 207 { 208 struct i2c_client *client = data->client; 209 int i; 210 211 if (time_after(jiffies, data->lut_last_updated + 5 * HZ) || 212 !data->lut_valid) { 213 for (i = 0; i < data->lut_size; i++) { 214 data->pwm1[1 + i] = i2c_smbus_read_byte_data(client, 215 LM63_REG_LUT_PWM(i)); 216 data->temp8[3 + i] = i2c_smbus_read_byte_data(client, 217 LM63_REG_LUT_TEMP(i)); 218 } 219 data->lut_temp_hyst = i2c_smbus_read_byte_data(client, 220 LM63_REG_LUT_TEMP_HYST); 221 222 data->lut_last_updated = jiffies; 223 data->lut_valid = 1; 224 } 225 } 226 227 static struct lm63_data *lm63_update_device(struct device *dev) 228 { 229 struct lm63_data *data = dev_get_drvdata(dev); 230 struct i2c_client *client = data->client; 231 unsigned long next_update; 232 233 mutex_lock(&data->update_lock); 234 235 next_update = data->last_updated + 236 msecs_to_jiffies(data->update_interval); 237 if (time_after(jiffies, next_update) || !data->valid) { 238 if (data->config & 0x04) { /* tachometer enabled */ 239 /* order matters for fan1_input */ 240 data->fan[0] = i2c_smbus_read_byte_data(client, 241 LM63_REG_TACH_COUNT_LSB) & 0xFC; 242 data->fan[0] |= i2c_smbus_read_byte_data(client, 243 LM63_REG_TACH_COUNT_MSB) << 8; 244 data->fan[1] = (i2c_smbus_read_byte_data(client, 245 LM63_REG_TACH_LIMIT_LSB) & 0xFC) 246 | (i2c_smbus_read_byte_data(client, 247 LM63_REG_TACH_LIMIT_MSB) << 8); 248 } 249 250 data->pwm1_freq = i2c_smbus_read_byte_data(client, 251 LM63_REG_PWM_FREQ); 252 if (data->pwm1_freq == 0) 253 data->pwm1_freq = 1; 254 data->pwm1[0] = i2c_smbus_read_byte_data(client, 255 LM63_REG_PWM_VALUE); 256 257 data->temp8[0] = i2c_smbus_read_byte_data(client, 258 LM63_REG_LOCAL_TEMP); 259 data->temp8[1] = i2c_smbus_read_byte_data(client, 260 LM63_REG_LOCAL_HIGH); 261 262 /* order matters for temp2_input */ 263 data->temp11[0] = i2c_smbus_read_byte_data(client, 264 LM63_REG_REMOTE_TEMP_MSB) << 8; 265 data->temp11[0] |= i2c_smbus_read_byte_data(client, 266 LM63_REG_REMOTE_TEMP_LSB); 267 data->temp11[1] = (i2c_smbus_read_byte_data(client, 268 LM63_REG_REMOTE_LOW_MSB) << 8) 269 | i2c_smbus_read_byte_data(client, 270 LM63_REG_REMOTE_LOW_LSB); 271 data->temp11[2] = (i2c_smbus_read_byte_data(client, 272 LM63_REG_REMOTE_HIGH_MSB) << 8) 273 | i2c_smbus_read_byte_data(client, 274 LM63_REG_REMOTE_HIGH_LSB); 275 data->temp11[3] = (i2c_smbus_read_byte_data(client, 276 LM63_REG_REMOTE_OFFSET_MSB) << 8) 277 | i2c_smbus_read_byte_data(client, 278 LM63_REG_REMOTE_OFFSET_LSB); 279 280 if (data->kind == lm96163) 281 data->temp11u = (i2c_smbus_read_byte_data(client, 282 LM96163_REG_REMOTE_TEMP_U_MSB) << 8) 283 | i2c_smbus_read_byte_data(client, 284 LM96163_REG_REMOTE_TEMP_U_LSB); 285 286 data->temp8[2] = i2c_smbus_read_byte_data(client, 287 LM63_REG_REMOTE_TCRIT); 288 data->temp2_crit_hyst = i2c_smbus_read_byte_data(client, 289 LM63_REG_REMOTE_TCRIT_HYST); 290 291 data->alarms = i2c_smbus_read_byte_data(client, 292 LM63_REG_ALERT_STATUS) & 0x7F; 293 294 data->last_updated = jiffies; 295 data->valid = true; 296 } 297 298 lm63_update_lut(data); 299 300 mutex_unlock(&data->update_lock); 301 302 return data; 303 } 304 305 /* 306 * Trip points in the lookup table should be in ascending order for both 307 * temperatures and PWM output values. 308 */ 309 static int lm63_lut_looks_bad(struct device *dev, struct lm63_data *data) 310 { 311 int i; 312 313 mutex_lock(&data->update_lock); 314 lm63_update_lut(data); 315 316 for (i = 1; i < data->lut_size; i++) { 317 if (data->pwm1[1 + i - 1] > data->pwm1[1 + i] 318 || data->temp8[3 + i - 1] > data->temp8[3 + i]) { 319 dev_warn(dev, 320 "Lookup table doesn't look sane (check entries %d and %d)\n", 321 i, i + 1); 322 break; 323 } 324 } 325 mutex_unlock(&data->update_lock); 326 327 return i == data->lut_size ? 0 : 1; 328 } 329 330 /* 331 * Sysfs callback functions and files 332 */ 333 334 static ssize_t show_fan(struct device *dev, struct device_attribute *devattr, 335 char *buf) 336 { 337 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 338 struct lm63_data *data = lm63_update_device(dev); 339 int fan; 340 341 mutex_lock(&data->update_lock); 342 fan = FAN_FROM_REG(data->fan[attr->index]); 343 mutex_unlock(&data->update_lock); 344 345 return sprintf(buf, "%d\n", fan); 346 } 347 348 static ssize_t set_fan(struct device *dev, struct device_attribute *dummy, 349 const char *buf, size_t count) 350 { 351 struct lm63_data *data = dev_get_drvdata(dev); 352 struct i2c_client *client = data->client; 353 unsigned long val; 354 int err; 355 356 err = kstrtoul(buf, 10, &val); 357 if (err) 358 return err; 359 360 mutex_lock(&data->update_lock); 361 data->fan[1] = FAN_TO_REG(val); 362 i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_LSB, 363 data->fan[1] & 0xFF); 364 i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_MSB, 365 data->fan[1] >> 8); 366 mutex_unlock(&data->update_lock); 367 return count; 368 } 369 370 static ssize_t show_pwm1(struct device *dev, struct device_attribute *devattr, 371 char *buf) 372 { 373 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 374 struct lm63_data *data = lm63_update_device(dev); 375 int nr = attr->index; 376 int pwm; 377 378 mutex_lock(&data->update_lock); 379 if (data->pwm_highres) 380 pwm = data->pwm1[nr]; 381 else 382 pwm = data->pwm1[nr] >= 2 * data->pwm1_freq ? 383 255 : (data->pwm1[nr] * 255 + data->pwm1_freq) / 384 (2 * data->pwm1_freq); 385 mutex_unlock(&data->update_lock); 386 387 return sprintf(buf, "%d\n", pwm); 388 } 389 390 static ssize_t set_pwm1(struct device *dev, struct device_attribute *devattr, 391 const char *buf, size_t count) 392 { 393 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 394 struct lm63_data *data = dev_get_drvdata(dev); 395 struct i2c_client *client = data->client; 396 int nr = attr->index; 397 unsigned long val; 398 int err; 399 u8 reg; 400 401 if (!(data->config_fan & 0x20)) /* register is read-only */ 402 return -EPERM; 403 404 err = kstrtoul(buf, 10, &val); 405 if (err) 406 return err; 407 408 reg = nr ? LM63_REG_LUT_PWM(nr - 1) : LM63_REG_PWM_VALUE; 409 val = clamp_val(val, 0, 255); 410 411 mutex_lock(&data->update_lock); 412 data->pwm1[nr] = data->pwm_highres ? val : 413 (val * data->pwm1_freq * 2 + 127) / 255; 414 i2c_smbus_write_byte_data(client, reg, data->pwm1[nr]); 415 mutex_unlock(&data->update_lock); 416 return count; 417 } 418 419 static ssize_t pwm1_enable_show(struct device *dev, 420 struct device_attribute *dummy, char *buf) 421 { 422 struct lm63_data *data = lm63_update_device(dev); 423 return sprintf(buf, "%d\n", data->config_fan & 0x20 ? 1 : 2); 424 } 425 426 static ssize_t pwm1_enable_store(struct device *dev, 427 struct device_attribute *dummy, 428 const char *buf, size_t count) 429 { 430 struct lm63_data *data = dev_get_drvdata(dev); 431 struct i2c_client *client = data->client; 432 unsigned long val; 433 int err; 434 435 err = kstrtoul(buf, 10, &val); 436 if (err) 437 return err; 438 if (val < 1 || val > 2) 439 return -EINVAL; 440 441 /* 442 * Only let the user switch to automatic mode if the lookup table 443 * looks sane. 444 */ 445 if (val == 2 && lm63_lut_looks_bad(dev, data)) 446 return -EPERM; 447 448 mutex_lock(&data->update_lock); 449 data->config_fan = i2c_smbus_read_byte_data(client, 450 LM63_REG_CONFIG_FAN); 451 if (val == 1) 452 data->config_fan |= 0x20; 453 else 454 data->config_fan &= ~0x20; 455 i2c_smbus_write_byte_data(client, LM63_REG_CONFIG_FAN, 456 data->config_fan); 457 mutex_unlock(&data->update_lock); 458 return count; 459 } 460 461 static ssize_t pwm1_freq_show(struct device *dev, 462 struct device_attribute *dummy, char *buf) 463 { 464 struct lm63_data *data = lm63_update_device(dev); 465 unsigned int base, freq; 466 467 mutex_lock(&data->update_lock); 468 base = (data->config_fan & 0x08) ? 469 LM63_PWM_BASE_SLOW_HZ : LM63_PWM_BASE_FAST_HZ; 470 freq = data->pwm1_freq; 471 mutex_unlock(&data->update_lock); 472 473 return sprintf(buf, "%u\n", base / freq); 474 } 475 476 /* 477 * Pick the closest CONFIG_FAN.SCS + PFR for the requested frequency. 478 * PWM_FREQ writes need the LUT unlocked, same as set_pwm1(). LUT PWM 479 * bytes are register-relative; rewrite them after a frequency change 480 * if duty cycles must be preserved. 481 */ 482 static ssize_t pwm1_freq_store(struct device *dev, 483 struct device_attribute *dummy, 484 const char *buf, size_t count) 485 { 486 struct lm63_data *data = dev_get_drvdata(dev); 487 struct i2c_client *client = data->client; 488 unsigned long val, pfr_fast, pfr_slow, err_fast, err_slow, pfr; 489 bool slow_clock; 490 int ret; 491 492 ret = kstrtoul(buf, 10, &val); 493 if (ret) 494 return ret; 495 if (val == 0) 496 return -EINVAL; 497 498 pfr_fast = clamp_val(DIV_ROUND_CLOSEST((unsigned long)LM63_PWM_BASE_FAST_HZ, val), 499 1UL, 31UL); 500 pfr_slow = clamp_val(DIV_ROUND_CLOSEST((unsigned long)LM63_PWM_BASE_SLOW_HZ, val), 501 1UL, 31UL); 502 err_fast = abs_diff(LM63_PWM_BASE_FAST_HZ / pfr_fast, val); 503 err_slow = abs_diff(LM63_PWM_BASE_SLOW_HZ / pfr_slow, val); 504 505 if (err_slow < err_fast) { 506 slow_clock = true; 507 pfr = pfr_slow; 508 } else { 509 slow_clock = false; 510 pfr = pfr_fast; 511 } 512 513 mutex_lock(&data->update_lock); 514 ret = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG_FAN); 515 if (ret < 0) { 516 mutex_unlock(&data->update_lock); 517 return ret; 518 } 519 data->config_fan = ret; 520 521 if (!(data->config_fan & 0x20)) { /* register is read-only */ 522 mutex_unlock(&data->update_lock); 523 return -EPERM; 524 } 525 526 if (data->kind == lm96163) { 527 ret = i2c_smbus_read_byte_data(client, LM96163_REG_CONFIG_ENHANCED); 528 if (ret < 0) { 529 mutex_unlock(&data->update_lock); 530 return ret; 531 } 532 data->pwm_highres = !slow_clock && pfr == 8 && (ret & 0x10); 533 } 534 535 if (slow_clock) 536 data->config_fan |= 0x08; 537 else 538 data->config_fan &= ~0x08; 539 i2c_smbus_write_byte_data(client, LM63_REG_CONFIG_FAN, data->config_fan); 540 i2c_smbus_write_byte_data(client, LM63_REG_PWM_FREQ, pfr); 541 data->pwm1_freq = pfr; 542 mutex_unlock(&data->update_lock); 543 return count; 544 } 545 546 /* 547 * There are 8bit registers for both local(temp1) and remote(temp2) sensor. 548 * For remote sensor registers temp2_offset has to be considered, 549 * for local sensor it must not. 550 * So we need separate 8bit accessors for local and remote sensor. 551 */ 552 static ssize_t show_local_temp8(struct device *dev, 553 struct device_attribute *devattr, 554 char *buf) 555 { 556 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 557 struct lm63_data *data = lm63_update_device(dev); 558 return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[attr->index])); 559 } 560 561 static ssize_t show_remote_temp8(struct device *dev, 562 struct device_attribute *devattr, 563 char *buf) 564 { 565 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 566 struct lm63_data *data = lm63_update_device(dev); 567 return sprintf(buf, "%d\n", temp8_from_reg(data, attr->index) 568 + data->temp2_offset); 569 } 570 571 static ssize_t show_lut_temp(struct device *dev, 572 struct device_attribute *devattr, 573 char *buf) 574 { 575 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 576 struct lm63_data *data = lm63_update_device(dev); 577 return sprintf(buf, "%d\n", lut_temp_from_reg(data, attr->index) 578 + data->temp2_offset); 579 } 580 581 static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr, 582 const char *buf, size_t count) 583 { 584 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 585 struct lm63_data *data = dev_get_drvdata(dev); 586 struct i2c_client *client = data->client; 587 int nr = attr->index; 588 long val; 589 int err; 590 int temp; 591 u8 reg; 592 593 err = kstrtol(buf, 10, &val); 594 if (err) 595 return err; 596 597 mutex_lock(&data->update_lock); 598 switch (nr) { 599 case 2: 600 reg = LM63_REG_REMOTE_TCRIT; 601 if (data->remote_unsigned) 602 temp = TEMP8U_TO_REG(val - data->temp2_offset); 603 else 604 temp = TEMP8_TO_REG(val - data->temp2_offset); 605 break; 606 case 1: 607 reg = LM63_REG_LOCAL_HIGH; 608 temp = TEMP8_TO_REG(val); 609 break; 610 default: /* lookup table */ 611 reg = LM63_REG_LUT_TEMP(nr - 3); 612 temp = lut_temp_to_reg(data, val); 613 } 614 data->temp8[nr] = temp; 615 i2c_smbus_write_byte_data(client, reg, temp); 616 mutex_unlock(&data->update_lock); 617 return count; 618 } 619 620 static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr, 621 char *buf) 622 { 623 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 624 struct lm63_data *data = lm63_update_device(dev); 625 int nr = attr->index; 626 int temp; 627 628 mutex_lock(&data->update_lock); 629 if (!nr) { 630 /* 631 * Use unsigned temperature unless its value is zero. 632 * If it is zero, use signed temperature. 633 */ 634 if (data->temp11u) 635 temp = TEMP11_FROM_REG(data->temp11u); 636 else 637 temp = TEMP11_FROM_REG(data->temp11[nr]); 638 } else { 639 if (data->remote_unsigned && nr == 2) 640 temp = TEMP11_FROM_REG((u16)data->temp11[nr]); 641 else 642 temp = TEMP11_FROM_REG(data->temp11[nr]); 643 } 644 temp += data->temp2_offset; 645 mutex_unlock(&data->update_lock); 646 647 return sprintf(buf, "%d\n", temp); 648 } 649 650 static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr, 651 const char *buf, size_t count) 652 { 653 static const u8 reg[6] = { 654 LM63_REG_REMOTE_LOW_MSB, 655 LM63_REG_REMOTE_LOW_LSB, 656 LM63_REG_REMOTE_HIGH_MSB, 657 LM63_REG_REMOTE_HIGH_LSB, 658 LM63_REG_REMOTE_OFFSET_MSB, 659 LM63_REG_REMOTE_OFFSET_LSB, 660 }; 661 662 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 663 struct lm63_data *data = dev_get_drvdata(dev); 664 struct i2c_client *client = data->client; 665 long val; 666 int err; 667 int nr = attr->index; 668 669 err = kstrtol(buf, 10, &val); 670 if (err) 671 return err; 672 673 mutex_lock(&data->update_lock); 674 if (data->remote_unsigned && nr == 2) 675 data->temp11[nr] = TEMP11U_TO_REG(val - data->temp2_offset); 676 else 677 data->temp11[nr] = TEMP11_TO_REG(val - data->temp2_offset); 678 679 i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2], 680 data->temp11[nr] >> 8); 681 i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1], 682 data->temp11[nr] & 0xff); 683 mutex_unlock(&data->update_lock); 684 return count; 685 } 686 687 /* 688 * Hysteresis register holds a relative value, while we want to present 689 * an absolute to user-space 690 */ 691 static ssize_t temp2_crit_hyst_show(struct device *dev, 692 struct device_attribute *dummy, char *buf) 693 { 694 struct lm63_data *data = lm63_update_device(dev); 695 int temp; 696 697 mutex_lock(&data->update_lock); 698 temp = temp8_from_reg(data, 2) + data->temp2_offset 699 - TEMP8_FROM_REG(data->temp2_crit_hyst); 700 mutex_unlock(&data->update_lock); 701 702 return sprintf(buf, "%d\n", temp); 703 } 704 705 static ssize_t show_lut_temp_hyst(struct device *dev, 706 struct device_attribute *devattr, char *buf) 707 { 708 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 709 struct lm63_data *data = lm63_update_device(dev); 710 int temp; 711 712 mutex_lock(&data->update_lock); 713 temp = lut_temp_from_reg(data, attr->index) + data->temp2_offset 714 - TEMP8_FROM_REG(data->lut_temp_hyst); 715 mutex_unlock(&data->update_lock); 716 717 return sprintf(buf, "%d\n", temp); 718 } 719 720 /* 721 * The LM63 has a single hysteresis register shared by all LUT entries. 722 * Expose it as a chip-wide hysteresis amount in millidegrees; the 723 * per-point pwm1_auto_pointN_temp_hyst attributes remain read-only and 724 * show the resulting absolute trip-down temperature for each entry. 725 */ 726 static ssize_t pwm1_auto_point_temp_hyst_show(struct device *dev, 727 struct device_attribute *dummy, 728 char *buf) 729 { 730 struct lm63_data *data = lm63_update_device(dev); 731 u8 hyst; 732 733 mutex_lock(&data->update_lock); 734 hyst = data->lut_temp_hyst; 735 mutex_unlock(&data->update_lock); 736 737 return sprintf(buf, "%d\n", TEMP8_FROM_REG(hyst)); 738 } 739 740 static ssize_t pwm1_auto_point_temp_hyst_store(struct device *dev, 741 struct device_attribute *dummy, 742 const char *buf, size_t count) 743 { 744 struct lm63_data *data = dev_get_drvdata(dev); 745 struct i2c_client *client = data->client; 746 unsigned long val; 747 int err; 748 749 err = kstrtoul(buf, 10, &val); 750 if (err) 751 return err; 752 753 mutex_lock(&data->update_lock); 754 data->lut_temp_hyst = HYST_TO_REG(val); 755 i2c_smbus_write_byte_data(client, LM63_REG_LUT_TEMP_HYST, 756 data->lut_temp_hyst); 757 mutex_unlock(&data->update_lock); 758 return count; 759 } 760 761 /* 762 * And now the other way around, user-space provides an absolute 763 * hysteresis value and we have to store a relative one 764 */ 765 static ssize_t temp2_crit_hyst_store(struct device *dev, 766 struct device_attribute *dummy, 767 const char *buf, size_t count) 768 { 769 struct lm63_data *data = lm63_update_device(dev); 770 struct i2c_client *client = data->client; 771 long val; 772 int err; 773 long hyst; 774 775 err = kstrtol(buf, 10, &val); 776 if (err) 777 return err; 778 779 mutex_lock(&data->update_lock); 780 hyst = temp8_from_reg(data, 2) + data->temp2_offset - val; 781 i2c_smbus_write_byte_data(client, LM63_REG_REMOTE_TCRIT_HYST, 782 HYST_TO_REG(hyst)); 783 mutex_unlock(&data->update_lock); 784 return count; 785 } 786 787 /* 788 * Set conversion rate. 789 * client->update_lock must be held when calling this function. 790 */ 791 static void lm63_set_convrate(struct lm63_data *data, unsigned int interval) 792 { 793 struct i2c_client *client = data->client; 794 unsigned int update_interval; 795 int i; 796 797 /* Shift calculations to avoid rounding errors */ 798 interval <<= 6; 799 800 /* find the nearest update rate */ 801 update_interval = (1 << (LM63_MAX_CONVRATE + 6)) * 1000 802 / data->max_convrate_hz; 803 for (i = 0; i < LM63_MAX_CONVRATE; i++, update_interval >>= 1) 804 if (interval >= update_interval * 3 / 4) 805 break; 806 807 i2c_smbus_write_byte_data(client, LM63_REG_CONVRATE, i); 808 data->update_interval = UPDATE_INTERVAL(data->max_convrate_hz, i); 809 } 810 811 static ssize_t update_interval_show(struct device *dev, 812 struct device_attribute *attr, char *buf) 813 { 814 struct lm63_data *data = dev_get_drvdata(dev); 815 816 return sprintf(buf, "%u\n", data->update_interval); 817 } 818 819 static ssize_t update_interval_store(struct device *dev, 820 struct device_attribute *attr, 821 const char *buf, size_t count) 822 { 823 struct lm63_data *data = dev_get_drvdata(dev); 824 unsigned long val; 825 int err; 826 827 err = kstrtoul(buf, 10, &val); 828 if (err) 829 return err; 830 831 mutex_lock(&data->update_lock); 832 lm63_set_convrate(data, clamp_val(val, 0, 100000)); 833 mutex_unlock(&data->update_lock); 834 835 return count; 836 } 837 838 static ssize_t temp2_type_show(struct device *dev, 839 struct device_attribute *attr, char *buf) 840 { 841 struct lm63_data *data = dev_get_drvdata(dev); 842 843 return sprintf(buf, data->trutherm ? "1\n" : "2\n"); 844 } 845 846 static ssize_t temp2_type_store(struct device *dev, 847 struct device_attribute *attr, 848 const char *buf, size_t count) 849 { 850 struct lm63_data *data = dev_get_drvdata(dev); 851 struct i2c_client *client = data->client; 852 unsigned long val; 853 int ret; 854 u8 reg; 855 856 ret = kstrtoul(buf, 10, &val); 857 if (ret < 0) 858 return ret; 859 if (val != 1 && val != 2) 860 return -EINVAL; 861 862 mutex_lock(&data->update_lock); 863 data->trutherm = val == 1; 864 reg = i2c_smbus_read_byte_data(client, LM96163_REG_TRUTHERM) & ~0x02; 865 i2c_smbus_write_byte_data(client, LM96163_REG_TRUTHERM, 866 reg | (data->trutherm ? 0x02 : 0x00)); 867 data->valid = false; 868 mutex_unlock(&data->update_lock); 869 870 return count; 871 } 872 873 static ssize_t alarms_show(struct device *dev, struct device_attribute *dummy, 874 char *buf) 875 { 876 struct lm63_data *data = lm63_update_device(dev); 877 return sprintf(buf, "%u\n", data->alarms); 878 } 879 880 static ssize_t show_alarm(struct device *dev, struct device_attribute *devattr, 881 char *buf) 882 { 883 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 884 struct lm63_data *data = lm63_update_device(dev); 885 int bitnr = attr->index; 886 887 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 888 } 889 890 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0); 891 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan, 892 set_fan, 1); 893 894 static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm1, set_pwm1, 0); 895 static DEVICE_ATTR_RW(pwm1_enable); 896 static DEVICE_ATTR_RW(pwm1_freq); 897 static DEVICE_ATTR_RW(pwm1_auto_point_temp_hyst); 898 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IWUSR | S_IRUGO, 899 show_pwm1, set_pwm1, 1); 900 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp, S_IWUSR | S_IRUGO, 901 show_lut_temp, set_temp8, 3); 902 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp_hyst, S_IRUGO, 903 show_lut_temp_hyst, NULL, 3); 904 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO, 905 show_pwm1, set_pwm1, 2); 906 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp, S_IWUSR | S_IRUGO, 907 show_lut_temp, set_temp8, 4); 908 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp_hyst, S_IRUGO, 909 show_lut_temp_hyst, NULL, 4); 910 static SENSOR_DEVICE_ATTR(pwm1_auto_point3_pwm, S_IWUSR | S_IRUGO, 911 show_pwm1, set_pwm1, 3); 912 static SENSOR_DEVICE_ATTR(pwm1_auto_point3_temp, S_IWUSR | S_IRUGO, 913 show_lut_temp, set_temp8, 5); 914 static SENSOR_DEVICE_ATTR(pwm1_auto_point3_temp_hyst, S_IRUGO, 915 show_lut_temp_hyst, NULL, 5); 916 static SENSOR_DEVICE_ATTR(pwm1_auto_point4_pwm, S_IWUSR | S_IRUGO, 917 show_pwm1, set_pwm1, 4); 918 static SENSOR_DEVICE_ATTR(pwm1_auto_point4_temp, S_IWUSR | S_IRUGO, 919 show_lut_temp, set_temp8, 6); 920 static SENSOR_DEVICE_ATTR(pwm1_auto_point4_temp_hyst, S_IRUGO, 921 show_lut_temp_hyst, NULL, 6); 922 static SENSOR_DEVICE_ATTR(pwm1_auto_point5_pwm, S_IWUSR | S_IRUGO, 923 show_pwm1, set_pwm1, 5); 924 static SENSOR_DEVICE_ATTR(pwm1_auto_point5_temp, S_IWUSR | S_IRUGO, 925 show_lut_temp, set_temp8, 7); 926 static SENSOR_DEVICE_ATTR(pwm1_auto_point5_temp_hyst, S_IRUGO, 927 show_lut_temp_hyst, NULL, 7); 928 static SENSOR_DEVICE_ATTR(pwm1_auto_point6_pwm, S_IWUSR | S_IRUGO, 929 show_pwm1, set_pwm1, 6); 930 static SENSOR_DEVICE_ATTR(pwm1_auto_point6_temp, S_IWUSR | S_IRUGO, 931 show_lut_temp, set_temp8, 8); 932 static SENSOR_DEVICE_ATTR(pwm1_auto_point6_temp_hyst, S_IRUGO, 933 show_lut_temp_hyst, NULL, 8); 934 static SENSOR_DEVICE_ATTR(pwm1_auto_point7_pwm, S_IWUSR | S_IRUGO, 935 show_pwm1, set_pwm1, 7); 936 static SENSOR_DEVICE_ATTR(pwm1_auto_point7_temp, S_IWUSR | S_IRUGO, 937 show_lut_temp, set_temp8, 9); 938 static SENSOR_DEVICE_ATTR(pwm1_auto_point7_temp_hyst, S_IRUGO, 939 show_lut_temp_hyst, NULL, 9); 940 static SENSOR_DEVICE_ATTR(pwm1_auto_point8_pwm, S_IWUSR | S_IRUGO, 941 show_pwm1, set_pwm1, 8); 942 static SENSOR_DEVICE_ATTR(pwm1_auto_point8_temp, S_IWUSR | S_IRUGO, 943 show_lut_temp, set_temp8, 10); 944 static SENSOR_DEVICE_ATTR(pwm1_auto_point8_temp_hyst, S_IRUGO, 945 show_lut_temp_hyst, NULL, 10); 946 static SENSOR_DEVICE_ATTR(pwm1_auto_point9_pwm, S_IWUSR | S_IRUGO, 947 show_pwm1, set_pwm1, 9); 948 static SENSOR_DEVICE_ATTR(pwm1_auto_point9_temp, S_IWUSR | S_IRUGO, 949 show_lut_temp, set_temp8, 11); 950 static SENSOR_DEVICE_ATTR(pwm1_auto_point9_temp_hyst, S_IRUGO, 951 show_lut_temp_hyst, NULL, 11); 952 static SENSOR_DEVICE_ATTR(pwm1_auto_point10_pwm, S_IWUSR | S_IRUGO, 953 show_pwm1, set_pwm1, 10); 954 static SENSOR_DEVICE_ATTR(pwm1_auto_point10_temp, S_IWUSR | S_IRUGO, 955 show_lut_temp, set_temp8, 12); 956 static SENSOR_DEVICE_ATTR(pwm1_auto_point10_temp_hyst, S_IRUGO, 957 show_lut_temp_hyst, NULL, 12); 958 static SENSOR_DEVICE_ATTR(pwm1_auto_point11_pwm, S_IWUSR | S_IRUGO, 959 show_pwm1, set_pwm1, 11); 960 static SENSOR_DEVICE_ATTR(pwm1_auto_point11_temp, S_IWUSR | S_IRUGO, 961 show_lut_temp, set_temp8, 13); 962 static SENSOR_DEVICE_ATTR(pwm1_auto_point11_temp_hyst, S_IRUGO, 963 show_lut_temp_hyst, NULL, 13); 964 static SENSOR_DEVICE_ATTR(pwm1_auto_point12_pwm, S_IWUSR | S_IRUGO, 965 show_pwm1, set_pwm1, 12); 966 static SENSOR_DEVICE_ATTR(pwm1_auto_point12_temp, S_IWUSR | S_IRUGO, 967 show_lut_temp, set_temp8, 14); 968 static SENSOR_DEVICE_ATTR(pwm1_auto_point12_temp_hyst, S_IRUGO, 969 show_lut_temp_hyst, NULL, 14); 970 971 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_local_temp8, NULL, 0); 972 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_local_temp8, 973 set_temp8, 1); 974 975 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0); 976 static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11, 977 set_temp11, 1); 978 static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11, 979 set_temp11, 2); 980 static SENSOR_DEVICE_ATTR(temp2_offset, S_IWUSR | S_IRUGO, show_temp11, 981 set_temp11, 3); 982 static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_remote_temp8, 983 set_temp8, 2); 984 static DEVICE_ATTR_RW(temp2_crit_hyst); 985 986 static DEVICE_ATTR_RW(temp2_type); 987 988 /* Individual alarm files */ 989 static SENSOR_DEVICE_ATTR(fan1_min_alarm, S_IRUGO, show_alarm, NULL, 0); 990 static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1); 991 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2); 992 static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3); 993 static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4); 994 static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6); 995 /* Raw alarm file for compatibility */ 996 static DEVICE_ATTR_RO(alarms); 997 998 static DEVICE_ATTR_RW(update_interval); 999 1000 static struct attribute *lm63_attributes[] = { 1001 &sensor_dev_attr_pwm1.dev_attr.attr, 1002 &dev_attr_pwm1_enable.attr, 1003 &dev_attr_pwm1_freq.attr, 1004 &dev_attr_pwm1_auto_point_temp_hyst.attr, 1005 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr, 1006 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr, 1007 &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr, 1008 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr, 1009 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr, 1010 &sensor_dev_attr_pwm1_auto_point2_temp_hyst.dev_attr.attr, 1011 &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr, 1012 &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr, 1013 &sensor_dev_attr_pwm1_auto_point3_temp_hyst.dev_attr.attr, 1014 &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr, 1015 &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr, 1016 &sensor_dev_attr_pwm1_auto_point4_temp_hyst.dev_attr.attr, 1017 &sensor_dev_attr_pwm1_auto_point5_pwm.dev_attr.attr, 1018 &sensor_dev_attr_pwm1_auto_point5_temp.dev_attr.attr, 1019 &sensor_dev_attr_pwm1_auto_point5_temp_hyst.dev_attr.attr, 1020 &sensor_dev_attr_pwm1_auto_point6_pwm.dev_attr.attr, 1021 &sensor_dev_attr_pwm1_auto_point6_temp.dev_attr.attr, 1022 &sensor_dev_attr_pwm1_auto_point6_temp_hyst.dev_attr.attr, 1023 &sensor_dev_attr_pwm1_auto_point7_pwm.dev_attr.attr, 1024 &sensor_dev_attr_pwm1_auto_point7_temp.dev_attr.attr, 1025 &sensor_dev_attr_pwm1_auto_point7_temp_hyst.dev_attr.attr, 1026 &sensor_dev_attr_pwm1_auto_point8_pwm.dev_attr.attr, 1027 &sensor_dev_attr_pwm1_auto_point8_temp.dev_attr.attr, 1028 &sensor_dev_attr_pwm1_auto_point8_temp_hyst.dev_attr.attr, 1029 1030 &sensor_dev_attr_temp1_input.dev_attr.attr, 1031 &sensor_dev_attr_temp2_input.dev_attr.attr, 1032 &sensor_dev_attr_temp2_min.dev_attr.attr, 1033 &sensor_dev_attr_temp1_max.dev_attr.attr, 1034 &sensor_dev_attr_temp2_max.dev_attr.attr, 1035 &sensor_dev_attr_temp2_offset.dev_attr.attr, 1036 &sensor_dev_attr_temp2_crit.dev_attr.attr, 1037 &dev_attr_temp2_crit_hyst.attr, 1038 1039 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, 1040 &sensor_dev_attr_temp2_fault.dev_attr.attr, 1041 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr, 1042 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, 1043 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, 1044 &dev_attr_alarms.attr, 1045 &dev_attr_update_interval.attr, 1046 NULL 1047 }; 1048 1049 static struct attribute *lm63_attributes_temp2_type[] = { 1050 &dev_attr_temp2_type.attr, 1051 NULL 1052 }; 1053 1054 static const struct attribute_group lm63_group_temp2_type = { 1055 .attrs = lm63_attributes_temp2_type, 1056 }; 1057 1058 static struct attribute *lm63_attributes_extra_lut[] = { 1059 &sensor_dev_attr_pwm1_auto_point9_pwm.dev_attr.attr, 1060 &sensor_dev_attr_pwm1_auto_point9_temp.dev_attr.attr, 1061 &sensor_dev_attr_pwm1_auto_point9_temp_hyst.dev_attr.attr, 1062 &sensor_dev_attr_pwm1_auto_point10_pwm.dev_attr.attr, 1063 &sensor_dev_attr_pwm1_auto_point10_temp.dev_attr.attr, 1064 &sensor_dev_attr_pwm1_auto_point10_temp_hyst.dev_attr.attr, 1065 &sensor_dev_attr_pwm1_auto_point11_pwm.dev_attr.attr, 1066 &sensor_dev_attr_pwm1_auto_point11_temp.dev_attr.attr, 1067 &sensor_dev_attr_pwm1_auto_point11_temp_hyst.dev_attr.attr, 1068 &sensor_dev_attr_pwm1_auto_point12_pwm.dev_attr.attr, 1069 &sensor_dev_attr_pwm1_auto_point12_temp.dev_attr.attr, 1070 &sensor_dev_attr_pwm1_auto_point12_temp_hyst.dev_attr.attr, 1071 NULL 1072 }; 1073 1074 static const struct attribute_group lm63_group_extra_lut = { 1075 .attrs = lm63_attributes_extra_lut, 1076 }; 1077 1078 /* 1079 * On LM63, temp2_crit can be set only once, which should be job 1080 * of the bootloader. 1081 * On LM64, temp2_crit can always be set. 1082 * On LM96163, temp2_crit can be set if bit 1 of the configuration 1083 * register is true. 1084 */ 1085 static umode_t lm63_attribute_mode(struct kobject *kobj, 1086 struct attribute *attr, int index) 1087 { 1088 struct device *dev = kobj_to_dev(kobj); 1089 struct lm63_data *data = dev_get_drvdata(dev); 1090 1091 if (attr == &sensor_dev_attr_temp2_crit.dev_attr.attr 1092 && (data->kind == lm64 || 1093 (data->kind == lm96163 && (data->config & 0x02)))) 1094 return attr->mode | S_IWUSR; 1095 1096 return attr->mode; 1097 } 1098 1099 static const struct attribute_group lm63_group = { 1100 .is_visible = lm63_attribute_mode, 1101 .attrs = lm63_attributes, 1102 }; 1103 1104 static struct attribute *lm63_attributes_fan1[] = { 1105 &sensor_dev_attr_fan1_input.dev_attr.attr, 1106 &sensor_dev_attr_fan1_min.dev_attr.attr, 1107 1108 &sensor_dev_attr_fan1_min_alarm.dev_attr.attr, 1109 NULL 1110 }; 1111 1112 static const struct attribute_group lm63_group_fan1 = { 1113 .attrs = lm63_attributes_fan1, 1114 }; 1115 1116 /* 1117 * Real code 1118 */ 1119 1120 /* Return 0 if detection is successful, -ENODEV otherwise */ 1121 static int lm63_detect(struct i2c_client *client, 1122 struct i2c_board_info *info) 1123 { 1124 struct i2c_adapter *adapter = client->adapter; 1125 u8 man_id, chip_id, reg_config1, reg_config2; 1126 u8 reg_alert_status, reg_alert_mask; 1127 int address = client->addr; 1128 1129 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 1130 return -ENODEV; 1131 1132 man_id = i2c_smbus_read_byte_data(client, LM63_REG_MAN_ID); 1133 chip_id = i2c_smbus_read_byte_data(client, LM63_REG_CHIP_ID); 1134 1135 reg_config1 = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1); 1136 reg_config2 = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG2); 1137 reg_alert_status = i2c_smbus_read_byte_data(client, 1138 LM63_REG_ALERT_STATUS); 1139 reg_alert_mask = i2c_smbus_read_byte_data(client, LM63_REG_ALERT_MASK); 1140 1141 if (man_id != 0x01 /* National Semiconductor */ 1142 || (reg_config1 & 0x18) != 0x00 1143 || (reg_config2 & 0xF8) != 0x00 1144 || (reg_alert_status & 0x20) != 0x00 1145 || (reg_alert_mask & 0xA4) != 0xA4) { 1146 dev_dbg(&adapter->dev, 1147 "Unsupported chip (man_id=0x%02X, chip_id=0x%02X)\n", 1148 man_id, chip_id); 1149 return -ENODEV; 1150 } 1151 1152 if (chip_id == 0x41 && address == 0x4c) 1153 strscpy(info->type, "lm63", I2C_NAME_SIZE); 1154 else if (chip_id == 0x51 && (address == 0x18 || address == 0x4e)) 1155 strscpy(info->type, "lm64", I2C_NAME_SIZE); 1156 else if (chip_id == 0x49 && address == 0x4c) 1157 strscpy(info->type, "lm96163", I2C_NAME_SIZE); 1158 else 1159 return -ENODEV; 1160 1161 return 0; 1162 } 1163 1164 /* 1165 * Ideally we shouldn't have to initialize anything, since the BIOS 1166 * should have taken care of everything 1167 */ 1168 static void lm63_init_client(struct lm63_data *data) 1169 { 1170 struct i2c_client *client = data->client; 1171 struct device *dev = &client->dev; 1172 u8 convrate; 1173 1174 data->config = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1); 1175 data->config_fan = i2c_smbus_read_byte_data(client, 1176 LM63_REG_CONFIG_FAN); 1177 1178 /* Start converting if needed */ 1179 if (data->config & 0x40) { /* standby */ 1180 dev_dbg(dev, "Switching to operational mode\n"); 1181 data->config &= 0xA7; 1182 i2c_smbus_write_byte_data(client, LM63_REG_CONFIG1, 1183 data->config); 1184 } 1185 /* Tachometer is always enabled on LM64 */ 1186 if (data->kind == lm64) 1187 data->config |= 0x04; 1188 1189 /* We may need pwm1_freq before ever updating the client data */ 1190 data->pwm1_freq = i2c_smbus_read_byte_data(client, LM63_REG_PWM_FREQ); 1191 if (data->pwm1_freq == 0) 1192 data->pwm1_freq = 1; 1193 1194 switch (data->kind) { 1195 case lm63: 1196 case lm64: 1197 data->max_convrate_hz = LM63_MAX_CONVRATE_HZ; 1198 data->lut_size = 8; 1199 break; 1200 case lm96163: 1201 data->max_convrate_hz = LM96163_MAX_CONVRATE_HZ; 1202 data->lut_size = 12; 1203 data->trutherm 1204 = i2c_smbus_read_byte_data(client, 1205 LM96163_REG_TRUTHERM) & 0x02; 1206 break; 1207 } 1208 convrate = i2c_smbus_read_byte_data(client, LM63_REG_CONVRATE); 1209 if (unlikely(convrate > LM63_MAX_CONVRATE)) 1210 convrate = LM63_MAX_CONVRATE; 1211 data->update_interval = UPDATE_INTERVAL(data->max_convrate_hz, 1212 convrate); 1213 1214 /* 1215 * For LM96163, check if high resolution PWM 1216 * and unsigned temperature format is enabled. 1217 */ 1218 if (data->kind == lm96163) { 1219 u8 config_enhanced 1220 = i2c_smbus_read_byte_data(client, 1221 LM96163_REG_CONFIG_ENHANCED); 1222 if (config_enhanced & 0x20) 1223 data->lut_temp_highres = true; 1224 if ((config_enhanced & 0x10) 1225 && !(data->config_fan & 0x08) && data->pwm1_freq == 8) 1226 data->pwm_highres = true; 1227 if (config_enhanced & 0x08) 1228 data->remote_unsigned = true; 1229 } 1230 1231 /* Show some debug info about the LM63 configuration */ 1232 if (data->kind == lm63) 1233 dev_dbg(dev, "Alert/tach pin configured for %s\n", 1234 (data->config & 0x04) ? "tachometer input" : 1235 "alert output"); 1236 dev_dbg(dev, "PWM clock %s kHz, output frequency %u Hz\n", 1237 (data->config_fan & 0x08) ? "1.4" : "360", 1238 ((data->config_fan & 0x08) ? 700 : 180000) / data->pwm1_freq); 1239 dev_dbg(dev, "PWM output active %s, %s mode\n", 1240 (data->config_fan & 0x10) ? "low" : "high", 1241 (data->config_fan & 0x20) ? "manual" : "auto"); 1242 } 1243 1244 static const struct i2c_device_id lm63_id[]; 1245 1246 static int lm63_probe(struct i2c_client *client) 1247 { 1248 struct device *dev = &client->dev; 1249 struct device *hwmon_dev; 1250 struct lm63_data *data; 1251 int groups = 0; 1252 1253 data = devm_kzalloc(dev, sizeof(struct lm63_data), GFP_KERNEL); 1254 if (!data) 1255 return -ENOMEM; 1256 1257 data->client = client; 1258 mutex_init(&data->update_lock); 1259 1260 /* Set the device type */ 1261 data->kind = (uintptr_t)i2c_get_match_data(client); 1262 if (data->kind == lm64) 1263 data->temp2_offset = 16000; 1264 1265 /* Initialize chip */ 1266 lm63_init_client(data); 1267 1268 /* Register sysfs hooks */ 1269 data->groups[groups++] = &lm63_group; 1270 if (data->config & 0x04) /* tachometer enabled */ 1271 data->groups[groups++] = &lm63_group_fan1; 1272 1273 if (data->kind == lm96163) { 1274 data->groups[groups++] = &lm63_group_temp2_type; 1275 data->groups[groups++] = &lm63_group_extra_lut; 1276 } 1277 1278 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, 1279 data, data->groups); 1280 return PTR_ERR_OR_ZERO(hwmon_dev); 1281 } 1282 1283 /* 1284 * Driver data (common to all clients) 1285 */ 1286 1287 static const struct i2c_device_id lm63_id[] = { 1288 { .name = "lm63", .driver_data = lm63 }, 1289 { .name = "lm64", .driver_data = lm64 }, 1290 { .name = "lm96163", .driver_data = lm96163 }, 1291 { } 1292 }; 1293 MODULE_DEVICE_TABLE(i2c, lm63_id); 1294 1295 static const struct of_device_id __maybe_unused lm63_of_match[] = { 1296 { 1297 .compatible = "national,lm63", 1298 .data = (void *)lm63 1299 }, 1300 { 1301 .compatible = "national,lm64", 1302 .data = (void *)lm64 1303 }, 1304 { 1305 .compatible = "national,lm96163", 1306 .data = (void *)lm96163 1307 }, 1308 { }, 1309 }; 1310 MODULE_DEVICE_TABLE(of, lm63_of_match); 1311 1312 static struct i2c_driver lm63_driver = { 1313 .class = I2C_CLASS_HWMON, 1314 .driver = { 1315 .name = "lm63", 1316 .of_match_table = of_match_ptr(lm63_of_match), 1317 }, 1318 .probe = lm63_probe, 1319 .id_table = lm63_id, 1320 .detect = lm63_detect, 1321 .address_list = normal_i2c, 1322 }; 1323 1324 module_i2c_driver(lm63_driver); 1325 1326 MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>"); 1327 MODULE_DESCRIPTION("LM63 driver"); 1328 MODULE_LICENSE("GPL"); 1329