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, LM63_REG_PWM_FREQ) & 0x1f; 251 if (data->pwm1_freq == 0) 252 data->pwm1_freq = 1; 253 data->pwm1[0] = i2c_smbus_read_byte_data(client, 254 LM63_REG_PWM_VALUE); 255 256 data->temp8[0] = i2c_smbus_read_byte_data(client, 257 LM63_REG_LOCAL_TEMP); 258 data->temp8[1] = i2c_smbus_read_byte_data(client, 259 LM63_REG_LOCAL_HIGH); 260 261 /* order matters for temp2_input */ 262 data->temp11[0] = i2c_smbus_read_byte_data(client, 263 LM63_REG_REMOTE_TEMP_MSB) << 8; 264 data->temp11[0] |= i2c_smbus_read_byte_data(client, 265 LM63_REG_REMOTE_TEMP_LSB); 266 data->temp11[1] = (i2c_smbus_read_byte_data(client, 267 LM63_REG_REMOTE_LOW_MSB) << 8) 268 | i2c_smbus_read_byte_data(client, 269 LM63_REG_REMOTE_LOW_LSB); 270 data->temp11[2] = (i2c_smbus_read_byte_data(client, 271 LM63_REG_REMOTE_HIGH_MSB) << 8) 272 | i2c_smbus_read_byte_data(client, 273 LM63_REG_REMOTE_HIGH_LSB); 274 data->temp11[3] = (i2c_smbus_read_byte_data(client, 275 LM63_REG_REMOTE_OFFSET_MSB) << 8) 276 | i2c_smbus_read_byte_data(client, 277 LM63_REG_REMOTE_OFFSET_LSB); 278 279 if (data->kind == lm96163) 280 data->temp11u = (i2c_smbus_read_byte_data(client, 281 LM96163_REG_REMOTE_TEMP_U_MSB) << 8) 282 | i2c_smbus_read_byte_data(client, 283 LM96163_REG_REMOTE_TEMP_U_LSB); 284 285 data->temp8[2] = i2c_smbus_read_byte_data(client, 286 LM63_REG_REMOTE_TCRIT); 287 data->temp2_crit_hyst = i2c_smbus_read_byte_data(client, 288 LM63_REG_REMOTE_TCRIT_HYST); 289 290 data->alarms = i2c_smbus_read_byte_data(client, 291 LM63_REG_ALERT_STATUS) & 0x7F; 292 293 data->last_updated = jiffies; 294 data->valid = true; 295 } 296 297 lm63_update_lut(data); 298 299 mutex_unlock(&data->update_lock); 300 301 return data; 302 } 303 304 /* 305 * Trip points in the lookup table should be in ascending order for both 306 * temperatures and PWM output values. 307 */ 308 static int lm63_lut_looks_bad(struct device *dev, struct lm63_data *data) 309 { 310 int i; 311 312 mutex_lock(&data->update_lock); 313 lm63_update_lut(data); 314 315 for (i = 1; i < data->lut_size; i++) { 316 if (data->pwm1[1 + i - 1] > data->pwm1[1 + i] 317 || data->temp8[3 + i - 1] > data->temp8[3 + i]) { 318 dev_warn(dev, 319 "Lookup table doesn't look sane (check entries %d and %d)\n", 320 i, i + 1); 321 break; 322 } 323 } 324 mutex_unlock(&data->update_lock); 325 326 return i == data->lut_size ? 0 : 1; 327 } 328 329 /* 330 * Sysfs callback functions and files 331 */ 332 333 static ssize_t show_fan(struct device *dev, struct device_attribute *devattr, 334 char *buf) 335 { 336 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 337 struct lm63_data *data = lm63_update_device(dev); 338 int fan; 339 340 mutex_lock(&data->update_lock); 341 fan = FAN_FROM_REG(data->fan[attr->index]); 342 mutex_unlock(&data->update_lock); 343 344 return sprintf(buf, "%d\n", fan); 345 } 346 347 static ssize_t set_fan(struct device *dev, struct device_attribute *dummy, 348 const char *buf, size_t count) 349 { 350 struct lm63_data *data = dev_get_drvdata(dev); 351 struct i2c_client *client = data->client; 352 unsigned long val; 353 int err; 354 355 err = kstrtoul(buf, 10, &val); 356 if (err) 357 return err; 358 359 mutex_lock(&data->update_lock); 360 data->fan[1] = FAN_TO_REG(val); 361 i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_LSB, 362 data->fan[1] & 0xFF); 363 i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_MSB, 364 data->fan[1] >> 8); 365 mutex_unlock(&data->update_lock); 366 return count; 367 } 368 369 static ssize_t show_pwm1(struct device *dev, struct device_attribute *devattr, 370 char *buf) 371 { 372 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 373 struct lm63_data *data = lm63_update_device(dev); 374 int nr = attr->index; 375 int pwm; 376 377 mutex_lock(&data->update_lock); 378 if (data->pwm_highres) 379 pwm = data->pwm1[nr]; 380 else 381 pwm = data->pwm1[nr] >= 2 * data->pwm1_freq ? 382 255 : (data->pwm1[nr] * 255 + data->pwm1_freq) / 383 (2 * data->pwm1_freq); 384 mutex_unlock(&data->update_lock); 385 386 return sprintf(buf, "%d\n", pwm); 387 } 388 389 static ssize_t set_pwm1(struct device *dev, struct device_attribute *devattr, 390 const char *buf, size_t count) 391 { 392 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 393 struct lm63_data *data = dev_get_drvdata(dev); 394 struct i2c_client *client = data->client; 395 int nr = attr->index; 396 unsigned long val; 397 int err; 398 u8 reg; 399 400 if (!(data->config_fan & 0x20)) /* register is read-only */ 401 return -EPERM; 402 403 err = kstrtoul(buf, 10, &val); 404 if (err) 405 return err; 406 407 reg = nr ? LM63_REG_LUT_PWM(nr - 1) : LM63_REG_PWM_VALUE; 408 val = clamp_val(val, 0, 255); 409 410 mutex_lock(&data->update_lock); 411 data->pwm1[nr] = data->pwm_highres ? val : 412 (val * data->pwm1_freq * 2 + 127) / 255; 413 i2c_smbus_write_byte_data(client, reg, data->pwm1[nr]); 414 mutex_unlock(&data->update_lock); 415 return count; 416 } 417 418 static ssize_t pwm1_enable_show(struct device *dev, 419 struct device_attribute *dummy, char *buf) 420 { 421 struct lm63_data *data = lm63_update_device(dev); 422 return sprintf(buf, "%d\n", data->config_fan & 0x20 ? 1 : 2); 423 } 424 425 static ssize_t pwm1_enable_store(struct device *dev, 426 struct device_attribute *dummy, 427 const char *buf, size_t count) 428 { 429 struct lm63_data *data = dev_get_drvdata(dev); 430 struct i2c_client *client = data->client; 431 unsigned long val; 432 int err; 433 434 err = kstrtoul(buf, 10, &val); 435 if (err) 436 return err; 437 if (val < 1 || val > 2) 438 return -EINVAL; 439 440 /* 441 * Only let the user switch to automatic mode if the lookup table 442 * looks sane. 443 */ 444 if (val == 2 && lm63_lut_looks_bad(dev, data)) 445 return -EPERM; 446 447 mutex_lock(&data->update_lock); 448 data->config_fan = i2c_smbus_read_byte_data(client, 449 LM63_REG_CONFIG_FAN); 450 if (val == 1) 451 data->config_fan |= 0x20; 452 else 453 data->config_fan &= ~0x20; 454 i2c_smbus_write_byte_data(client, LM63_REG_CONFIG_FAN, 455 data->config_fan); 456 mutex_unlock(&data->update_lock); 457 return count; 458 } 459 460 static ssize_t pwm1_freq_show(struct device *dev, 461 struct device_attribute *dummy, char *buf) 462 { 463 struct lm63_data *data = lm63_update_device(dev); 464 unsigned int base, freq; 465 466 mutex_lock(&data->update_lock); 467 base = (data->config_fan & 0x08) ? 468 LM63_PWM_BASE_SLOW_HZ : LM63_PWM_BASE_FAST_HZ; 469 freq = data->pwm1_freq; 470 mutex_unlock(&data->update_lock); 471 472 return sprintf(buf, "%u\n", base / freq); 473 } 474 475 /* 476 * Pick the closest CONFIG_FAN.SCS + PFR for the requested frequency. 477 * PWM_FREQ writes need the LUT unlocked, same as set_pwm1(). LUT PWM 478 * bytes are register-relative; rewrite them after a frequency change 479 * if duty cycles must be preserved. 480 */ 481 static ssize_t pwm1_freq_store(struct device *dev, 482 struct device_attribute *dummy, 483 const char *buf, size_t count) 484 { 485 struct lm63_data *data = dev_get_drvdata(dev); 486 struct i2c_client *client = data->client; 487 unsigned long val, pfr_fast, pfr_slow, err_fast, err_slow, pfr; 488 bool slow_clock; 489 int ret; 490 491 ret = kstrtoul(buf, 10, &val); 492 if (ret) 493 return ret; 494 if (val == 0) 495 return -EINVAL; 496 497 pfr_fast = clamp_val(DIV_ROUND_CLOSEST((unsigned long)LM63_PWM_BASE_FAST_HZ, val), 498 1UL, 31UL); 499 pfr_slow = clamp_val(DIV_ROUND_CLOSEST((unsigned long)LM63_PWM_BASE_SLOW_HZ, val), 500 1UL, 31UL); 501 err_fast = abs_diff(LM63_PWM_BASE_FAST_HZ / pfr_fast, val); 502 err_slow = abs_diff(LM63_PWM_BASE_SLOW_HZ / pfr_slow, val); 503 504 if (err_slow < err_fast) { 505 slow_clock = true; 506 pfr = pfr_slow; 507 } else { 508 slow_clock = false; 509 pfr = pfr_fast; 510 } 511 512 mutex_lock(&data->update_lock); 513 ret = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG_FAN); 514 if (ret < 0) { 515 mutex_unlock(&data->update_lock); 516 return ret; 517 } 518 data->config_fan = ret; 519 520 if (!(data->config_fan & 0x20)) { /* register is read-only */ 521 mutex_unlock(&data->update_lock); 522 return -EPERM; 523 } 524 525 if (data->kind == lm96163) { 526 ret = i2c_smbus_read_byte_data(client, LM96163_REG_CONFIG_ENHANCED); 527 if (ret < 0) { 528 mutex_unlock(&data->update_lock); 529 return ret; 530 } 531 data->pwm_highres = !slow_clock && pfr == 8 && (ret & 0x10); 532 } 533 534 if (slow_clock) 535 data->config_fan |= 0x08; 536 else 537 data->config_fan &= ~0x08; 538 i2c_smbus_write_byte_data(client, LM63_REG_CONFIG_FAN, data->config_fan); 539 i2c_smbus_write_byte_data(client, LM63_REG_PWM_FREQ, pfr); 540 data->pwm1_freq = pfr; 541 mutex_unlock(&data->update_lock); 542 return count; 543 } 544 545 /* 546 * There are 8bit registers for both local(temp1) and remote(temp2) sensor. 547 * For remote sensor registers temp2_offset has to be considered, 548 * for local sensor it must not. 549 * So we need separate 8bit accessors for local and remote sensor. 550 */ 551 static ssize_t show_local_temp8(struct device *dev, 552 struct device_attribute *devattr, 553 char *buf) 554 { 555 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 556 struct lm63_data *data = lm63_update_device(dev); 557 return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[attr->index])); 558 } 559 560 static ssize_t show_remote_temp8(struct device *dev, 561 struct device_attribute *devattr, 562 char *buf) 563 { 564 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 565 struct lm63_data *data = lm63_update_device(dev); 566 return sprintf(buf, "%d\n", temp8_from_reg(data, attr->index) 567 + data->temp2_offset); 568 } 569 570 static ssize_t show_lut_temp(struct device *dev, 571 struct device_attribute *devattr, 572 char *buf) 573 { 574 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 575 struct lm63_data *data = lm63_update_device(dev); 576 return sprintf(buf, "%d\n", lut_temp_from_reg(data, attr->index) 577 + data->temp2_offset); 578 } 579 580 static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr, 581 const char *buf, size_t count) 582 { 583 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 584 struct lm63_data *data = dev_get_drvdata(dev); 585 struct i2c_client *client = data->client; 586 int nr = attr->index; 587 long val; 588 int err; 589 int temp; 590 u8 reg; 591 592 err = kstrtol(buf, 10, &val); 593 if (err) 594 return err; 595 596 mutex_lock(&data->update_lock); 597 switch (nr) { 598 case 2: 599 reg = LM63_REG_REMOTE_TCRIT; 600 if (data->remote_unsigned) 601 temp = TEMP8U_TO_REG(val - data->temp2_offset); 602 else 603 temp = TEMP8_TO_REG(val - data->temp2_offset); 604 break; 605 case 1: 606 reg = LM63_REG_LOCAL_HIGH; 607 temp = TEMP8_TO_REG(val); 608 break; 609 default: /* lookup table */ 610 reg = LM63_REG_LUT_TEMP(nr - 3); 611 temp = lut_temp_to_reg(data, val); 612 } 613 data->temp8[nr] = temp; 614 i2c_smbus_write_byte_data(client, reg, temp); 615 mutex_unlock(&data->update_lock); 616 return count; 617 } 618 619 static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr, 620 char *buf) 621 { 622 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 623 struct lm63_data *data = lm63_update_device(dev); 624 int nr = attr->index; 625 int temp; 626 627 mutex_lock(&data->update_lock); 628 if (!nr) { 629 /* 630 * Use unsigned temperature unless its value is zero. 631 * If it is zero, use signed temperature. 632 */ 633 if (data->temp11u) 634 temp = TEMP11_FROM_REG(data->temp11u); 635 else 636 temp = TEMP11_FROM_REG(data->temp11[nr]); 637 } else { 638 if (data->remote_unsigned && nr == 2) 639 temp = TEMP11_FROM_REG((u16)data->temp11[nr]); 640 else 641 temp = TEMP11_FROM_REG(data->temp11[nr]); 642 } 643 temp += data->temp2_offset; 644 mutex_unlock(&data->update_lock); 645 646 return sprintf(buf, "%d\n", temp); 647 } 648 649 static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr, 650 const char *buf, size_t count) 651 { 652 static const u8 reg[6] = { 653 LM63_REG_REMOTE_LOW_MSB, 654 LM63_REG_REMOTE_LOW_LSB, 655 LM63_REG_REMOTE_HIGH_MSB, 656 LM63_REG_REMOTE_HIGH_LSB, 657 LM63_REG_REMOTE_OFFSET_MSB, 658 LM63_REG_REMOTE_OFFSET_LSB, 659 }; 660 661 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 662 struct lm63_data *data = dev_get_drvdata(dev); 663 struct i2c_client *client = data->client; 664 long val; 665 int err; 666 int nr = attr->index; 667 668 err = kstrtol(buf, 10, &val); 669 if (err) 670 return err; 671 672 mutex_lock(&data->update_lock); 673 if (data->remote_unsigned && nr == 2) 674 data->temp11[nr] = TEMP11U_TO_REG(val - data->temp2_offset); 675 else 676 data->temp11[nr] = TEMP11_TO_REG(val - data->temp2_offset); 677 678 i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2], 679 data->temp11[nr] >> 8); 680 i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1], 681 data->temp11[nr] & 0xff); 682 mutex_unlock(&data->update_lock); 683 return count; 684 } 685 686 /* 687 * Hysteresis register holds a relative value, while we want to present 688 * an absolute to user-space 689 */ 690 static ssize_t temp2_crit_hyst_show(struct device *dev, 691 struct device_attribute *dummy, char *buf) 692 { 693 struct lm63_data *data = lm63_update_device(dev); 694 int temp; 695 696 mutex_lock(&data->update_lock); 697 temp = temp8_from_reg(data, 2) + data->temp2_offset 698 - TEMP8_FROM_REG(data->temp2_crit_hyst); 699 mutex_unlock(&data->update_lock); 700 701 return sprintf(buf, "%d\n", temp); 702 } 703 704 static ssize_t show_lut_temp_hyst(struct device *dev, 705 struct device_attribute *devattr, char *buf) 706 { 707 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 708 struct lm63_data *data = lm63_update_device(dev); 709 int temp; 710 711 mutex_lock(&data->update_lock); 712 temp = lut_temp_from_reg(data, attr->index) + data->temp2_offset 713 - TEMP8_FROM_REG(data->lut_temp_hyst); 714 mutex_unlock(&data->update_lock); 715 716 return sprintf(buf, "%d\n", temp); 717 } 718 719 /* 720 * The LM63 has a single hysteresis register shared by all LUT entries. 721 * Expose it as a chip-wide hysteresis amount in millidegrees; the 722 * per-point pwm1_auto_pointN_temp_hyst attributes remain read-only and 723 * show the resulting absolute trip-down temperature for each entry. 724 */ 725 static ssize_t pwm1_auto_point_temp_hyst_show(struct device *dev, 726 struct device_attribute *dummy, 727 char *buf) 728 { 729 struct lm63_data *data = lm63_update_device(dev); 730 u8 hyst; 731 732 mutex_lock(&data->update_lock); 733 hyst = data->lut_temp_hyst; 734 mutex_unlock(&data->update_lock); 735 736 return sprintf(buf, "%d\n", TEMP8_FROM_REG(hyst)); 737 } 738 739 static ssize_t pwm1_auto_point_temp_hyst_store(struct device *dev, 740 struct device_attribute *dummy, 741 const char *buf, size_t count) 742 { 743 struct lm63_data *data = dev_get_drvdata(dev); 744 struct i2c_client *client = data->client; 745 unsigned long val; 746 int err; 747 748 err = kstrtoul(buf, 10, &val); 749 if (err) 750 return err; 751 752 mutex_lock(&data->update_lock); 753 data->lut_temp_hyst = HYST_TO_REG(val); 754 i2c_smbus_write_byte_data(client, LM63_REG_LUT_TEMP_HYST, 755 data->lut_temp_hyst); 756 mutex_unlock(&data->update_lock); 757 return count; 758 } 759 760 /* 761 * And now the other way around, user-space provides an absolute 762 * hysteresis value and we have to store a relative one 763 */ 764 static ssize_t temp2_crit_hyst_store(struct device *dev, 765 struct device_attribute *dummy, 766 const char *buf, size_t count) 767 { 768 struct lm63_data *data = lm63_update_device(dev); 769 struct i2c_client *client = data->client; 770 long val; 771 int err; 772 long hyst; 773 774 err = kstrtol(buf, 10, &val); 775 if (err) 776 return err; 777 778 mutex_lock(&data->update_lock); 779 hyst = temp8_from_reg(data, 2) + data->temp2_offset - val; 780 i2c_smbus_write_byte_data(client, LM63_REG_REMOTE_TCRIT_HYST, 781 HYST_TO_REG(hyst)); 782 mutex_unlock(&data->update_lock); 783 return count; 784 } 785 786 /* 787 * Set conversion rate. 788 * client->update_lock must be held when calling this function. 789 */ 790 static void lm63_set_convrate(struct lm63_data *data, unsigned int interval) 791 { 792 struct i2c_client *client = data->client; 793 unsigned int update_interval; 794 int i; 795 796 /* Shift calculations to avoid rounding errors */ 797 interval <<= 6; 798 799 /* find the nearest update rate */ 800 update_interval = (1 << (LM63_MAX_CONVRATE + 6)) * 1000 801 / data->max_convrate_hz; 802 for (i = 0; i < LM63_MAX_CONVRATE; i++, update_interval >>= 1) 803 if (interval >= update_interval * 3 / 4) 804 break; 805 806 i2c_smbus_write_byte_data(client, LM63_REG_CONVRATE, i); 807 data->update_interval = UPDATE_INTERVAL(data->max_convrate_hz, i); 808 } 809 810 static ssize_t update_interval_show(struct device *dev, 811 struct device_attribute *attr, char *buf) 812 { 813 struct lm63_data *data = dev_get_drvdata(dev); 814 815 return sprintf(buf, "%u\n", data->update_interval); 816 } 817 818 static ssize_t update_interval_store(struct device *dev, 819 struct device_attribute *attr, 820 const char *buf, size_t count) 821 { 822 struct lm63_data *data = dev_get_drvdata(dev); 823 unsigned long val; 824 int err; 825 826 err = kstrtoul(buf, 10, &val); 827 if (err) 828 return err; 829 830 mutex_lock(&data->update_lock); 831 lm63_set_convrate(data, clamp_val(val, 0, 100000)); 832 mutex_unlock(&data->update_lock); 833 834 return count; 835 } 836 837 static ssize_t temp2_type_show(struct device *dev, 838 struct device_attribute *attr, char *buf) 839 { 840 struct lm63_data *data = dev_get_drvdata(dev); 841 842 return sprintf(buf, data->trutherm ? "1\n" : "2\n"); 843 } 844 845 static ssize_t temp2_type_store(struct device *dev, 846 struct device_attribute *attr, 847 const char *buf, size_t count) 848 { 849 struct lm63_data *data = dev_get_drvdata(dev); 850 struct i2c_client *client = data->client; 851 unsigned long val; 852 int ret; 853 u8 reg; 854 855 ret = kstrtoul(buf, 10, &val); 856 if (ret < 0) 857 return ret; 858 if (val != 1 && val != 2) 859 return -EINVAL; 860 861 mutex_lock(&data->update_lock); 862 data->trutherm = val == 1; 863 reg = i2c_smbus_read_byte_data(client, LM96163_REG_TRUTHERM) & ~0x02; 864 i2c_smbus_write_byte_data(client, LM96163_REG_TRUTHERM, 865 reg | (data->trutherm ? 0x02 : 0x00)); 866 data->valid = false; 867 mutex_unlock(&data->update_lock); 868 869 return count; 870 } 871 872 static ssize_t alarms_show(struct device *dev, struct device_attribute *dummy, 873 char *buf) 874 { 875 struct lm63_data *data = lm63_update_device(dev); 876 return sprintf(buf, "%u\n", data->alarms); 877 } 878 879 static ssize_t show_alarm(struct device *dev, struct device_attribute *devattr, 880 char *buf) 881 { 882 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); 883 struct lm63_data *data = lm63_update_device(dev); 884 int bitnr = attr->index; 885 886 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); 887 } 888 889 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0); 890 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan, 891 set_fan, 1); 892 893 static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm1, set_pwm1, 0); 894 static DEVICE_ATTR_RW(pwm1_enable); 895 static DEVICE_ATTR_RW(pwm1_freq); 896 static DEVICE_ATTR_RW(pwm1_auto_point_temp_hyst); 897 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IWUSR | S_IRUGO, 898 show_pwm1, set_pwm1, 1); 899 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp, S_IWUSR | S_IRUGO, 900 show_lut_temp, set_temp8, 3); 901 static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp_hyst, S_IRUGO, 902 show_lut_temp_hyst, NULL, 3); 903 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO, 904 show_pwm1, set_pwm1, 2); 905 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp, S_IWUSR | S_IRUGO, 906 show_lut_temp, set_temp8, 4); 907 static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp_hyst, S_IRUGO, 908 show_lut_temp_hyst, NULL, 4); 909 static SENSOR_DEVICE_ATTR(pwm1_auto_point3_pwm, S_IWUSR | S_IRUGO, 910 show_pwm1, set_pwm1, 3); 911 static SENSOR_DEVICE_ATTR(pwm1_auto_point3_temp, S_IWUSR | S_IRUGO, 912 show_lut_temp, set_temp8, 5); 913 static SENSOR_DEVICE_ATTR(pwm1_auto_point3_temp_hyst, S_IRUGO, 914 show_lut_temp_hyst, NULL, 5); 915 static SENSOR_DEVICE_ATTR(pwm1_auto_point4_pwm, S_IWUSR | S_IRUGO, 916 show_pwm1, set_pwm1, 4); 917 static SENSOR_DEVICE_ATTR(pwm1_auto_point4_temp, S_IWUSR | S_IRUGO, 918 show_lut_temp, set_temp8, 6); 919 static SENSOR_DEVICE_ATTR(pwm1_auto_point4_temp_hyst, S_IRUGO, 920 show_lut_temp_hyst, NULL, 6); 921 static SENSOR_DEVICE_ATTR(pwm1_auto_point5_pwm, S_IWUSR | S_IRUGO, 922 show_pwm1, set_pwm1, 5); 923 static SENSOR_DEVICE_ATTR(pwm1_auto_point5_temp, S_IWUSR | S_IRUGO, 924 show_lut_temp, set_temp8, 7); 925 static SENSOR_DEVICE_ATTR(pwm1_auto_point5_temp_hyst, S_IRUGO, 926 show_lut_temp_hyst, NULL, 7); 927 static SENSOR_DEVICE_ATTR(pwm1_auto_point6_pwm, S_IWUSR | S_IRUGO, 928 show_pwm1, set_pwm1, 6); 929 static SENSOR_DEVICE_ATTR(pwm1_auto_point6_temp, S_IWUSR | S_IRUGO, 930 show_lut_temp, set_temp8, 8); 931 static SENSOR_DEVICE_ATTR(pwm1_auto_point6_temp_hyst, S_IRUGO, 932 show_lut_temp_hyst, NULL, 8); 933 static SENSOR_DEVICE_ATTR(pwm1_auto_point7_pwm, S_IWUSR | S_IRUGO, 934 show_pwm1, set_pwm1, 7); 935 static SENSOR_DEVICE_ATTR(pwm1_auto_point7_temp, S_IWUSR | S_IRUGO, 936 show_lut_temp, set_temp8, 9); 937 static SENSOR_DEVICE_ATTR(pwm1_auto_point7_temp_hyst, S_IRUGO, 938 show_lut_temp_hyst, NULL, 9); 939 static SENSOR_DEVICE_ATTR(pwm1_auto_point8_pwm, S_IWUSR | S_IRUGO, 940 show_pwm1, set_pwm1, 8); 941 static SENSOR_DEVICE_ATTR(pwm1_auto_point8_temp, S_IWUSR | S_IRUGO, 942 show_lut_temp, set_temp8, 10); 943 static SENSOR_DEVICE_ATTR(pwm1_auto_point8_temp_hyst, S_IRUGO, 944 show_lut_temp_hyst, NULL, 10); 945 static SENSOR_DEVICE_ATTR(pwm1_auto_point9_pwm, S_IWUSR | S_IRUGO, 946 show_pwm1, set_pwm1, 9); 947 static SENSOR_DEVICE_ATTR(pwm1_auto_point9_temp, S_IWUSR | S_IRUGO, 948 show_lut_temp, set_temp8, 11); 949 static SENSOR_DEVICE_ATTR(pwm1_auto_point9_temp_hyst, S_IRUGO, 950 show_lut_temp_hyst, NULL, 11); 951 static SENSOR_DEVICE_ATTR(pwm1_auto_point10_pwm, S_IWUSR | S_IRUGO, 952 show_pwm1, set_pwm1, 10); 953 static SENSOR_DEVICE_ATTR(pwm1_auto_point10_temp, S_IWUSR | S_IRUGO, 954 show_lut_temp, set_temp8, 12); 955 static SENSOR_DEVICE_ATTR(pwm1_auto_point10_temp_hyst, S_IRUGO, 956 show_lut_temp_hyst, NULL, 12); 957 static SENSOR_DEVICE_ATTR(pwm1_auto_point11_pwm, S_IWUSR | S_IRUGO, 958 show_pwm1, set_pwm1, 11); 959 static SENSOR_DEVICE_ATTR(pwm1_auto_point11_temp, S_IWUSR | S_IRUGO, 960 show_lut_temp, set_temp8, 13); 961 static SENSOR_DEVICE_ATTR(pwm1_auto_point11_temp_hyst, S_IRUGO, 962 show_lut_temp_hyst, NULL, 13); 963 static SENSOR_DEVICE_ATTR(pwm1_auto_point12_pwm, S_IWUSR | S_IRUGO, 964 show_pwm1, set_pwm1, 12); 965 static SENSOR_DEVICE_ATTR(pwm1_auto_point12_temp, S_IWUSR | S_IRUGO, 966 show_lut_temp, set_temp8, 14); 967 static SENSOR_DEVICE_ATTR(pwm1_auto_point12_temp_hyst, S_IRUGO, 968 show_lut_temp_hyst, NULL, 14); 969 970 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_local_temp8, NULL, 0); 971 static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_local_temp8, 972 set_temp8, 1); 973 974 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0); 975 static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11, 976 set_temp11, 1); 977 static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11, 978 set_temp11, 2); 979 static SENSOR_DEVICE_ATTR(temp2_offset, S_IWUSR | S_IRUGO, show_temp11, 980 set_temp11, 3); 981 static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_remote_temp8, 982 set_temp8, 2); 983 static DEVICE_ATTR_RW(temp2_crit_hyst); 984 985 static DEVICE_ATTR_RW(temp2_type); 986 987 /* Individual alarm files */ 988 static SENSOR_DEVICE_ATTR(fan1_min_alarm, S_IRUGO, show_alarm, NULL, 0); 989 static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1); 990 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2); 991 static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3); 992 static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4); 993 static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6); 994 /* Raw alarm file for compatibility */ 995 static DEVICE_ATTR_RO(alarms); 996 997 static DEVICE_ATTR_RW(update_interval); 998 999 static struct attribute *lm63_attributes[] = { 1000 &sensor_dev_attr_pwm1.dev_attr.attr, 1001 &dev_attr_pwm1_enable.attr, 1002 &dev_attr_pwm1_freq.attr, 1003 &dev_attr_pwm1_auto_point_temp_hyst.attr, 1004 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr, 1005 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr, 1006 &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr, 1007 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr, 1008 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr, 1009 &sensor_dev_attr_pwm1_auto_point2_temp_hyst.dev_attr.attr, 1010 &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr, 1011 &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr, 1012 &sensor_dev_attr_pwm1_auto_point3_temp_hyst.dev_attr.attr, 1013 &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr, 1014 &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr, 1015 &sensor_dev_attr_pwm1_auto_point4_temp_hyst.dev_attr.attr, 1016 &sensor_dev_attr_pwm1_auto_point5_pwm.dev_attr.attr, 1017 &sensor_dev_attr_pwm1_auto_point5_temp.dev_attr.attr, 1018 &sensor_dev_attr_pwm1_auto_point5_temp_hyst.dev_attr.attr, 1019 &sensor_dev_attr_pwm1_auto_point6_pwm.dev_attr.attr, 1020 &sensor_dev_attr_pwm1_auto_point6_temp.dev_attr.attr, 1021 &sensor_dev_attr_pwm1_auto_point6_temp_hyst.dev_attr.attr, 1022 &sensor_dev_attr_pwm1_auto_point7_pwm.dev_attr.attr, 1023 &sensor_dev_attr_pwm1_auto_point7_temp.dev_attr.attr, 1024 &sensor_dev_attr_pwm1_auto_point7_temp_hyst.dev_attr.attr, 1025 &sensor_dev_attr_pwm1_auto_point8_pwm.dev_attr.attr, 1026 &sensor_dev_attr_pwm1_auto_point8_temp.dev_attr.attr, 1027 &sensor_dev_attr_pwm1_auto_point8_temp_hyst.dev_attr.attr, 1028 1029 &sensor_dev_attr_temp1_input.dev_attr.attr, 1030 &sensor_dev_attr_temp2_input.dev_attr.attr, 1031 &sensor_dev_attr_temp2_min.dev_attr.attr, 1032 &sensor_dev_attr_temp1_max.dev_attr.attr, 1033 &sensor_dev_attr_temp2_max.dev_attr.attr, 1034 &sensor_dev_attr_temp2_offset.dev_attr.attr, 1035 &sensor_dev_attr_temp2_crit.dev_attr.attr, 1036 &dev_attr_temp2_crit_hyst.attr, 1037 1038 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, 1039 &sensor_dev_attr_temp2_fault.dev_attr.attr, 1040 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr, 1041 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, 1042 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, 1043 &dev_attr_alarms.attr, 1044 &dev_attr_update_interval.attr, 1045 NULL 1046 }; 1047 1048 static struct attribute *lm63_attributes_temp2_type[] = { 1049 &dev_attr_temp2_type.attr, 1050 NULL 1051 }; 1052 1053 static const struct attribute_group lm63_group_temp2_type = { 1054 .attrs = lm63_attributes_temp2_type, 1055 }; 1056 1057 static struct attribute *lm63_attributes_extra_lut[] = { 1058 &sensor_dev_attr_pwm1_auto_point9_pwm.dev_attr.attr, 1059 &sensor_dev_attr_pwm1_auto_point9_temp.dev_attr.attr, 1060 &sensor_dev_attr_pwm1_auto_point9_temp_hyst.dev_attr.attr, 1061 &sensor_dev_attr_pwm1_auto_point10_pwm.dev_attr.attr, 1062 &sensor_dev_attr_pwm1_auto_point10_temp.dev_attr.attr, 1063 &sensor_dev_attr_pwm1_auto_point10_temp_hyst.dev_attr.attr, 1064 &sensor_dev_attr_pwm1_auto_point11_pwm.dev_attr.attr, 1065 &sensor_dev_attr_pwm1_auto_point11_temp.dev_attr.attr, 1066 &sensor_dev_attr_pwm1_auto_point11_temp_hyst.dev_attr.attr, 1067 &sensor_dev_attr_pwm1_auto_point12_pwm.dev_attr.attr, 1068 &sensor_dev_attr_pwm1_auto_point12_temp.dev_attr.attr, 1069 &sensor_dev_attr_pwm1_auto_point12_temp_hyst.dev_attr.attr, 1070 NULL 1071 }; 1072 1073 static const struct attribute_group lm63_group_extra_lut = { 1074 .attrs = lm63_attributes_extra_lut, 1075 }; 1076 1077 /* 1078 * On LM63, temp2_crit can be set only once, which should be job 1079 * of the bootloader. 1080 * On LM64, temp2_crit can always be set. 1081 * On LM96163, temp2_crit can be set if bit 1 of the configuration 1082 * register is true. 1083 */ 1084 static umode_t lm63_attribute_mode(struct kobject *kobj, 1085 struct attribute *attr, int index) 1086 { 1087 struct device *dev = kobj_to_dev(kobj); 1088 struct lm63_data *data = dev_get_drvdata(dev); 1089 1090 if (attr == &sensor_dev_attr_temp2_crit.dev_attr.attr 1091 && (data->kind == lm64 || 1092 (data->kind == lm96163 && (data->config & 0x02)))) 1093 return attr->mode | S_IWUSR; 1094 1095 return attr->mode; 1096 } 1097 1098 static const struct attribute_group lm63_group = { 1099 .is_visible = lm63_attribute_mode, 1100 .attrs = lm63_attributes, 1101 }; 1102 1103 static struct attribute *lm63_attributes_fan1[] = { 1104 &sensor_dev_attr_fan1_input.dev_attr.attr, 1105 &sensor_dev_attr_fan1_min.dev_attr.attr, 1106 1107 &sensor_dev_attr_fan1_min_alarm.dev_attr.attr, 1108 NULL 1109 }; 1110 1111 static const struct attribute_group lm63_group_fan1 = { 1112 .attrs = lm63_attributes_fan1, 1113 }; 1114 1115 /* 1116 * Real code 1117 */ 1118 1119 /* Return 0 if detection is successful, -ENODEV otherwise */ 1120 static int lm63_detect(struct i2c_client *client, 1121 struct i2c_board_info *info) 1122 { 1123 struct i2c_adapter *adapter = client->adapter; 1124 u8 man_id, chip_id, reg_config1, reg_config2; 1125 u8 reg_alert_status, reg_alert_mask; 1126 int address = client->addr; 1127 1128 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 1129 return -ENODEV; 1130 1131 man_id = i2c_smbus_read_byte_data(client, LM63_REG_MAN_ID); 1132 chip_id = i2c_smbus_read_byte_data(client, LM63_REG_CHIP_ID); 1133 1134 reg_config1 = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1); 1135 reg_config2 = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG2); 1136 reg_alert_status = i2c_smbus_read_byte_data(client, 1137 LM63_REG_ALERT_STATUS); 1138 reg_alert_mask = i2c_smbus_read_byte_data(client, LM63_REG_ALERT_MASK); 1139 1140 if (man_id != 0x01 /* National Semiconductor */ 1141 || (reg_config1 & 0x18) != 0x00 1142 || (reg_config2 & 0xF8) != 0x00 1143 || (reg_alert_status & 0x20) != 0x00 1144 || (reg_alert_mask & 0xA4) != 0xA4) { 1145 dev_dbg(&adapter->dev, 1146 "Unsupported chip (man_id=0x%02X, chip_id=0x%02X)\n", 1147 man_id, chip_id); 1148 return -ENODEV; 1149 } 1150 1151 if (chip_id == 0x41 && address == 0x4c) 1152 strscpy(info->type, "lm63", I2C_NAME_SIZE); 1153 else if (chip_id == 0x51 && (address == 0x18 || address == 0x4e)) 1154 strscpy(info->type, "lm64", I2C_NAME_SIZE); 1155 else if (chip_id == 0x49 && address == 0x4c) 1156 strscpy(info->type, "lm96163", I2C_NAME_SIZE); 1157 else 1158 return -ENODEV; 1159 1160 return 0; 1161 } 1162 1163 /* 1164 * Ideally we shouldn't have to initialize anything, since the BIOS 1165 * should have taken care of everything 1166 */ 1167 static void lm63_init_client(struct lm63_data *data) 1168 { 1169 struct i2c_client *client = data->client; 1170 struct device *dev = &client->dev; 1171 u8 convrate; 1172 1173 data->config = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1); 1174 data->config_fan = i2c_smbus_read_byte_data(client, 1175 LM63_REG_CONFIG_FAN); 1176 1177 /* Start converting if needed */ 1178 if (data->config & 0x40) { /* standby */ 1179 dev_dbg(dev, "Switching to operational mode\n"); 1180 data->config &= 0xA7; 1181 i2c_smbus_write_byte_data(client, LM63_REG_CONFIG1, 1182 data->config); 1183 } 1184 /* Tachometer is always enabled on LM64 */ 1185 if (data->kind == lm64) 1186 data->config |= 0x04; 1187 1188 /* We may need pwm1_freq before ever updating the client data */ 1189 data->pwm1_freq = i2c_smbus_read_byte_data(client, LM63_REG_PWM_FREQ) & 0x1f; 1190 if (data->pwm1_freq == 0) 1191 data->pwm1_freq = 1; 1192 1193 switch (data->kind) { 1194 case lm63: 1195 case lm64: 1196 data->max_convrate_hz = LM63_MAX_CONVRATE_HZ; 1197 data->lut_size = 8; 1198 break; 1199 case lm96163: 1200 data->max_convrate_hz = LM96163_MAX_CONVRATE_HZ; 1201 data->lut_size = 12; 1202 data->trutherm 1203 = i2c_smbus_read_byte_data(client, 1204 LM96163_REG_TRUTHERM) & 0x02; 1205 break; 1206 } 1207 convrate = i2c_smbus_read_byte_data(client, LM63_REG_CONVRATE); 1208 if (unlikely(convrate > LM63_MAX_CONVRATE)) 1209 convrate = LM63_MAX_CONVRATE; 1210 data->update_interval = UPDATE_INTERVAL(data->max_convrate_hz, 1211 convrate); 1212 1213 /* 1214 * For LM96163, check if high resolution PWM 1215 * and unsigned temperature format is enabled. 1216 */ 1217 if (data->kind == lm96163) { 1218 u8 config_enhanced 1219 = i2c_smbus_read_byte_data(client, 1220 LM96163_REG_CONFIG_ENHANCED); 1221 if (config_enhanced & 0x20) 1222 data->lut_temp_highres = true; 1223 if ((config_enhanced & 0x10) 1224 && !(data->config_fan & 0x08) && data->pwm1_freq == 8) 1225 data->pwm_highres = true; 1226 if (config_enhanced & 0x08) 1227 data->remote_unsigned = true; 1228 } 1229 1230 /* Show some debug info about the LM63 configuration */ 1231 if (data->kind == lm63) 1232 dev_dbg(dev, "Alert/tach pin configured for %s\n", 1233 (data->config & 0x04) ? "tachometer input" : 1234 "alert output"); 1235 dev_dbg(dev, "PWM clock %s kHz, output frequency %u Hz\n", 1236 (data->config_fan & 0x08) ? "1.4" : "360", 1237 ((data->config_fan & 0x08) ? 700 : 180000) / data->pwm1_freq); 1238 dev_dbg(dev, "PWM output active %s, %s mode\n", 1239 (data->config_fan & 0x10) ? "low" : "high", 1240 (data->config_fan & 0x20) ? "manual" : "auto"); 1241 } 1242 1243 static const struct i2c_device_id lm63_id[]; 1244 1245 static int lm63_probe(struct i2c_client *client) 1246 { 1247 struct device *dev = &client->dev; 1248 struct device *hwmon_dev; 1249 struct lm63_data *data; 1250 int groups = 0; 1251 1252 data = devm_kzalloc(dev, sizeof(struct lm63_data), GFP_KERNEL); 1253 if (!data) 1254 return -ENOMEM; 1255 1256 data->client = client; 1257 mutex_init(&data->update_lock); 1258 1259 /* Set the device type */ 1260 data->kind = (uintptr_t)i2c_get_match_data(client); 1261 if (data->kind == lm64) 1262 data->temp2_offset = 16000; 1263 1264 /* Initialize chip */ 1265 lm63_init_client(data); 1266 1267 /* Register sysfs hooks */ 1268 data->groups[groups++] = &lm63_group; 1269 if (data->config & 0x04) /* tachometer enabled */ 1270 data->groups[groups++] = &lm63_group_fan1; 1271 1272 if (data->kind == lm96163) { 1273 data->groups[groups++] = &lm63_group_temp2_type; 1274 data->groups[groups++] = &lm63_group_extra_lut; 1275 } 1276 1277 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, 1278 data, data->groups); 1279 return PTR_ERR_OR_ZERO(hwmon_dev); 1280 } 1281 1282 /* 1283 * Driver data (common to all clients) 1284 */ 1285 1286 static const struct i2c_device_id lm63_id[] = { 1287 { .name = "lm63", .driver_data = lm63 }, 1288 { .name = "lm64", .driver_data = lm64 }, 1289 { .name = "lm96163", .driver_data = lm96163 }, 1290 { } 1291 }; 1292 MODULE_DEVICE_TABLE(i2c, lm63_id); 1293 1294 static const struct of_device_id __maybe_unused lm63_of_match[] = { 1295 { 1296 .compatible = "national,lm63", 1297 .data = (void *)lm63 1298 }, 1299 { 1300 .compatible = "national,lm64", 1301 .data = (void *)lm64 1302 }, 1303 { 1304 .compatible = "national,lm96163", 1305 .data = (void *)lm96163 1306 }, 1307 { }, 1308 }; 1309 MODULE_DEVICE_TABLE(of, lm63_of_match); 1310 1311 static struct i2c_driver lm63_driver = { 1312 .class = I2C_CLASS_HWMON, 1313 .driver = { 1314 .name = "lm63", 1315 .of_match_table = of_match_ptr(lm63_of_match), 1316 }, 1317 .probe = lm63_probe, 1318 .id_table = lm63_id, 1319 .detect = lm63_detect, 1320 .address_list = normal_i2c, 1321 }; 1322 1323 module_i2c_driver(lm63_driver); 1324 1325 MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>"); 1326 MODULE_DESCRIPTION("LM63 driver"); 1327 MODULE_LICENSE("GPL"); 1328