lm75.c revision 1.33
1 /* $NetBSD: lm75.c,v 1.33 2018/06/26 06:03:57 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 2003 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Jason R. Thorpe for Wasabi Systems, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 #include <sys/cdefs.h> 39 __KERNEL_RCSID(0, "$NetBSD: lm75.c,v 1.33 2018/06/26 06:03:57 thorpej Exp $"); 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/device.h> 44 #include <sys/kernel.h> 45 #include <sys/sysctl.h> 46 47 #include <dev/sysmon/sysmonvar.h> 48 49 #include <dev/i2c/i2cvar.h> 50 #include <dev/i2c/lm75reg.h> 51 52 #ifdef macppc 53 #define HAVE_OF 1 54 #endif 55 56 #ifdef HAVE_OF 57 #include <dev/ofw/openfirm.h> 58 #endif 59 60 struct lmtemp_softc { 61 device_t sc_dev; 62 i2c_tag_t sc_tag; 63 int sc_address; 64 65 struct sysmon_envsys *sc_sme; 66 envsys_data_t sc_sensor; 67 int sc_tmax; 68 uint32_t sc_smax, sc_smin, sc_scrit; 69 70 uint32_t (*sc_lmtemp_decode)(const uint8_t *, int); 71 void (*sc_lmtemp_encode)(const uint32_t, uint8_t *, int); 72 }; 73 74 static int lmtemp_match(device_t, cfdata_t, void *); 75 static void lmtemp_attach(device_t, device_t, void *); 76 77 CFATTACH_DECL_NEW(lmtemp, sizeof(struct lmtemp_softc), 78 lmtemp_match, lmtemp_attach, NULL, NULL); 79 80 static void lmtemp_refresh(struct sysmon_envsys *, envsys_data_t *); 81 static int lmtemp_config_write(struct lmtemp_softc *, uint8_t); 82 static int lmtemp_temp_write(struct lmtemp_softc *, uint8_t, uint32_t, 83 int); 84 static int lmtemp_temp_read(struct lmtemp_softc *, uint8_t, uint32_t *, 85 int); 86 static uint32_t lmtemp_decode_lm75(const uint8_t *, int); 87 static uint32_t lmtemp_decode_ds75(const uint8_t *, int); 88 static uint32_t lmtemp_decode_lm77(const uint8_t *, int); 89 static void lmtemp_encode_lm75(const uint32_t, uint8_t *, int); 90 static void lmtemp_encode_ds75(const uint32_t, uint8_t *, int); 91 static void lmtemp_encode_lm77(const uint32_t, uint8_t *, int); 92 static void lmtemp_getlim_lm75(struct sysmon_envsys *, envsys_data_t *, 93 sysmon_envsys_lim_t *, uint32_t *); 94 static void lmtemp_getlim_lm77(struct sysmon_envsys *, envsys_data_t *, 95 sysmon_envsys_lim_t *, uint32_t *); 96 static void lmtemp_setlim_lm75(struct sysmon_envsys *, envsys_data_t *, 97 sysmon_envsys_lim_t *, uint32_t *); 98 static void lmtemp_setlim_lm77(struct sysmon_envsys *, envsys_data_t *, 99 sysmon_envsys_lim_t *, uint32_t *); 100 101 static void lmtemp_setup_sysctl(struct lmtemp_softc *); 102 static int sysctl_lm75_temp(SYSCTLFN_ARGS); 103 104 static const struct device_compatible_entry compat_data[] = { 105 { "i2c-lm75", 0 }, 106 { "ds1775", 0 }, 107 /* 108 * see XXX in _attach() below: add code once non-lm75 matches are 109 * added here! 110 */ 111 { NULL, 0 } 112 }; 113 114 enum { 115 lmtemp_lm75 = 0, 116 lmtemp_ds75, 117 lmtemp_lm77, 118 }; 119 static const struct { 120 int lmtemp_type; 121 const char *lmtemp_name; 122 int lmtemp_addrmask; 123 int lmtemp_addr; 124 uint32_t (*lmtemp_decode)(const uint8_t *, int); 125 void (*lmtemp_encode)(const uint32_t, uint8_t *, int); 126 void (*lmtemp_getlim)(struct sysmon_envsys *, envsys_data_t *, 127 sysmon_envsys_lim_t *, uint32_t *); 128 void (*lmtemp_setlim)(struct sysmon_envsys *, envsys_data_t *, 129 sysmon_envsys_lim_t *, uint32_t *); 130 } lmtemptbl[] = { 131 { lmtemp_lm75, "LM75", LM75_ADDRMASK, LM75_ADDR, 132 lmtemp_decode_lm75, lmtemp_encode_lm75, 133 lmtemp_getlim_lm75, lmtemp_setlim_lm75 }, 134 { lmtemp_ds75, "DS75", LM75_ADDRMASK, LM75_ADDR, 135 lmtemp_decode_ds75, lmtemp_encode_ds75, 136 lmtemp_getlim_lm75, lmtemp_setlim_lm75 }, 137 { lmtemp_lm77, "LM77", LM77_ADDRMASK, LM77_ADDR, 138 lmtemp_decode_lm77, lmtemp_encode_lm77, 139 lmtemp_getlim_lm77, lmtemp_setlim_lm77 }, 140 { -1, NULL, 0, 0, 141 NULL, NULL, 142 NULL, NULL } 143 }; 144 145 static int 146 lmtemp_match(device_t parent, cfdata_t cf, void *aux) 147 { 148 struct i2c_attach_args *ia = aux; 149 int i, match_result; 150 151 if (iic_use_direct_match(ia, cf, compat_data, &match_result)) 152 return match_result; 153 154 /* 155 * Indirect config - not much we can do! 156 */ 157 for (i = 0; lmtemptbl[i].lmtemp_type != -1 ; i++) 158 if (lmtemptbl[i].lmtemp_type == cf->cf_flags) 159 break; 160 if (lmtemptbl[i].lmtemp_type == -1) 161 return 0; 162 163 if ((ia->ia_addr & lmtemptbl[i].lmtemp_addrmask) == 164 lmtemptbl[i].lmtemp_addr) 165 return I2C_MATCH_ADDRESS_ONLY; 166 167 return 0; 168 } 169 170 static void 171 lmtemp_attach(device_t parent, device_t self, void *aux) 172 { 173 struct lmtemp_softc *sc = device_private(self); 174 struct i2c_attach_args *ia = aux; 175 char name[64]; 176 int i; 177 178 sc->sc_dev = self; 179 if (ia->ia_name == NULL) { 180 for (i = 0; lmtemptbl[i].lmtemp_type != -1 ; i++) 181 if (lmtemptbl[i].lmtemp_type == 182 device_cfdata(self)->cf_flags) 183 break; 184 } else { 185 if (strcmp(ia->ia_name, "ds1775") == 0) { 186 i = 1; /* LMTYPE_DS75 */ 187 } else { 188 /* XXX - add code when adding other direct matches! */ 189 i = 0; 190 } 191 } 192 193 sc->sc_tag = ia->ia_tag; 194 sc->sc_address = ia->ia_addr; 195 196 aprint_naive(": Temperature Sensor\n"); 197 if (ia->ia_name) { 198 aprint_normal(": %s %s Temperature Sensor\n", ia->ia_name, 199 lmtemptbl[i].lmtemp_name); 200 } else { 201 aprint_normal(": %s Temperature Sensor\n", 202 lmtemptbl[i].lmtemp_name); 203 } 204 205 sc->sc_lmtemp_decode = lmtemptbl[i].lmtemp_decode; 206 sc->sc_lmtemp_encode = lmtemptbl[i].lmtemp_encode; 207 208 iic_acquire_bus(sc->sc_tag, I2C_F_POLL); 209 210 /* Read temperature limit(s) and remember initial value(s). */ 211 if (i == lmtemp_lm77) { 212 if (lmtemp_temp_read(sc, LM77_REG_TCRIT_SET_POINT, 213 &sc->sc_scrit, 1) != 0) { 214 aprint_error_dev(self, 215 "unable to read low register\n"); 216 iic_release_bus(sc->sc_tag, I2C_F_POLL); 217 return; 218 } 219 if (lmtemp_temp_read(sc, LM77_REG_TLOW_SET_POINT, 220 &sc->sc_smin, 1) != 0) { 221 aprint_error_dev(self, 222 "unable to read low register\n"); 223 iic_release_bus(sc->sc_tag, I2C_F_POLL); 224 return; 225 } 226 if (lmtemp_temp_read(sc, LM77_REG_THIGH_SET_POINT, 227 &sc->sc_smax, 1) != 0) { 228 aprint_error_dev(self, 229 "unable to read high register\n"); 230 iic_release_bus(sc->sc_tag, I2C_F_POLL); 231 return; 232 } 233 } else { /* LM75 or compatible */ 234 if (lmtemp_temp_read(sc, LM75_REG_TOS_SET_POINT, 235 &sc->sc_smax, 1) != 0) { 236 aprint_error_dev(self, "unable to read Tos register\n"); 237 iic_release_bus(sc->sc_tag, I2C_F_POLL); 238 return; 239 } 240 } 241 sc->sc_tmax = sc->sc_smax; 242 243 if (i == lmtemp_lm75) 244 lmtemp_setup_sysctl(sc); 245 246 /* Set the configuration of the LM75 to defaults. */ 247 if (lmtemp_config_write(sc, LM75_CONFIG_FAULT_QUEUE_4) != 0) { 248 aprint_error_dev(self, "unable to write config register\n"); 249 iic_release_bus(sc->sc_tag, I2C_F_POLL); 250 return; 251 } 252 iic_release_bus(sc->sc_tag, I2C_F_POLL); 253 254 sc->sc_sme = sysmon_envsys_create(); 255 /* Initialize sensor data. */ 256 sc->sc_sensor.units = ENVSYS_STEMP; 257 sc->sc_sensor.state = ENVSYS_SINVALID; 258 sc->sc_sensor.flags = ENVSYS_FMONLIMITS; 259 260 (void)strlcpy(name, 261 ia->ia_name? ia->ia_name : device_xname(self), 262 sizeof(sc->sc_sensor.desc)); 263 #ifdef HAVE_OF 264 int ch; 265 ch = OF_child(ia->ia_cookie); 266 if (ch != 0) { 267 OF_getprop(ch, "location", name, 64); 268 } 269 #endif 270 (void)strlcpy(sc->sc_sensor.desc, name, 271 sizeof(sc->sc_sensor.desc)); 272 if (sysmon_envsys_sensor_attach(sc->sc_sme, &sc->sc_sensor)) { 273 sysmon_envsys_destroy(sc->sc_sme); 274 return; 275 } 276 277 /* Hook into system monitor. */ 278 sc->sc_sme->sme_name = device_xname(self); 279 sc->sc_sme->sme_cookie = sc; 280 sc->sc_sme->sme_refresh = lmtemp_refresh; 281 sc->sc_sme->sme_get_limits = lmtemptbl[i].lmtemp_getlim; 282 sc->sc_sme->sme_set_limits = lmtemptbl[i].lmtemp_setlim; 283 284 if (sysmon_envsys_register(sc->sc_sme)) { 285 aprint_error_dev(self, "unable to register with sysmon\n"); 286 sysmon_envsys_destroy(sc->sc_sme); 287 } 288 } 289 290 static int 291 lmtemp_config_write(struct lmtemp_softc *sc, uint8_t val) 292 { 293 uint8_t cmdbuf[2]; 294 295 cmdbuf[0] = LM75_REG_CONFIG; 296 cmdbuf[1] = val; 297 298 return iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, 299 sc->sc_address, cmdbuf, 1, &cmdbuf[1], 1, I2C_F_POLL); 300 } 301 302 static int 303 lmtemp_temp_write(struct lmtemp_softc *sc, uint8_t reg, uint32_t val, int degc) 304 { 305 uint8_t cmdbuf[3]; 306 307 cmdbuf[0] = reg; 308 sc->sc_lmtemp_encode(val, &cmdbuf[1], degc); 309 310 return iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, 311 sc->sc_address, cmdbuf, 1, &cmdbuf[1], 2, I2C_F_POLL); 312 } 313 314 static int 315 lmtemp_temp_read(struct lmtemp_softc *sc, uint8_t which, uint32_t *valp, 316 int degc) 317 { 318 int error; 319 uint8_t cmdbuf[1]; 320 uint8_t buf[LM75_TEMP_LEN]; 321 322 cmdbuf[0] = which; 323 324 error = iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, 325 sc->sc_address, cmdbuf, 1, buf, LM75_TEMP_LEN, 0); 326 if (error) 327 return error; 328 329 *valp = sc->sc_lmtemp_decode(buf, degc); 330 return 0; 331 } 332 333 static void 334 lmtemp_refresh_sensor_data(struct lmtemp_softc *sc) 335 { 336 uint32_t val; 337 int error; 338 339 error = lmtemp_temp_read(sc, LM75_REG_TEMP, &val, 0); 340 if (error) { 341 #if 0 342 aprint_error_dev(sc->sc_dev, "unable to read temperature, error = %d\n", 343 error); 344 #endif 345 sc->sc_sensor.state = ENVSYS_SINVALID; 346 return; 347 } 348 349 sc->sc_sensor.value_cur = val; 350 sc->sc_sensor.state = ENVSYS_SVALID; 351 } 352 353 static void 354 lmtemp_refresh(struct sysmon_envsys *sme, envsys_data_t *edata) 355 { 356 struct lmtemp_softc *sc = sme->sme_cookie; 357 358 iic_acquire_bus(sc->sc_tag, 0); /* also locks our instance */ 359 lmtemp_refresh_sensor_data(sc); 360 iic_release_bus(sc->sc_tag, 0); /* also unlocks our instance */ 361 } 362 363 static void 364 lmtemp_getlim_lm75(struct sysmon_envsys *sme, envsys_data_t *edata, 365 sysmon_envsys_lim_t *limits, uint32_t *props) 366 { 367 struct lmtemp_softc *sc = sme->sme_cookie; 368 uint32_t val; 369 370 *props &= ~(PROP_CRITMAX); 371 372 iic_acquire_bus(sc->sc_tag, 0); 373 if (lmtemp_temp_read(sc, LM75_REG_TOS_SET_POINT, &val, 0) == 0) { 374 limits->sel_critmax = val; 375 *props |= PROP_CRITMAX; 376 } 377 iic_release_bus(sc->sc_tag, 0); 378 } 379 380 static void 381 lmtemp_getlim_lm77(struct sysmon_envsys *sme, envsys_data_t *edata, 382 sysmon_envsys_lim_t *limits, uint32_t *props) 383 { 384 struct lmtemp_softc *sc = sme->sme_cookie; 385 uint32_t val; 386 387 *props &= ~(PROP_CRITMAX | PROP_WARNMAX | PROP_WARNMIN); 388 389 iic_acquire_bus(sc->sc_tag, 0); 390 if (lmtemp_temp_read(sc, LM77_REG_TCRIT_SET_POINT, &val, 0) == 0) { 391 limits->sel_critmax = val; 392 *props |= PROP_CRITMAX; 393 } 394 if (lmtemp_temp_read(sc, LM77_REG_THIGH_SET_POINT, &val, 0) == 0) { 395 limits->sel_warnmax = val; 396 *props |= PROP_WARNMAX; 397 } 398 if (lmtemp_temp_read(sc, LM77_REG_TLOW_SET_POINT, &val, 0) == 0) { 399 limits->sel_warnmin = val; 400 *props |= PROP_WARNMIN; 401 } 402 iic_release_bus(sc->sc_tag, 0); 403 } 404 405 static void 406 lmtemp_setlim_lm75(struct sysmon_envsys *sme, envsys_data_t *edata, 407 sysmon_envsys_lim_t *limits, uint32_t *props) 408 { 409 struct lmtemp_softc *sc = sme->sme_cookie; 410 int32_t limit; 411 412 if (*props & PROP_CRITMAX) { 413 if (limits == NULL) /* Restore defaults */ 414 limit = sc->sc_smax; 415 else 416 limit = limits->sel_critmax; 417 iic_acquire_bus(sc->sc_tag, 0); 418 lmtemp_temp_write(sc, LM75_REG_THYST_SET_POINT, 419 limit - 5000000, 0); 420 lmtemp_temp_write(sc, LM75_REG_TOS_SET_POINT, limit, 0); 421 iic_release_bus(sc->sc_tag, 0); 422 423 /* Synchronise sysctl */ 424 sc->sc_tmax = (limit - 273150000) / 1000000; 425 } 426 } 427 428 static void 429 lmtemp_setlim_lm77(struct sysmon_envsys *sme, envsys_data_t *edata, 430 sysmon_envsys_lim_t *limits, uint32_t *props) 431 { 432 struct lmtemp_softc *sc = sme->sme_cookie; 433 int32_t limit; 434 435 iic_acquire_bus(sc->sc_tag, 0); 436 if (*props & PROP_CRITMAX) { 437 if (limits == NULL) /* Restore defaults */ 438 limit = sc->sc_scrit; 439 else 440 limit = limits->sel_critmax; 441 lmtemp_temp_write(sc, LM77_REG_TCRIT_SET_POINT, limit, 0); 442 } 443 if (*props & PROP_WARNMAX) { 444 if (limits == NULL) /* Restore defaults */ 445 limit = sc->sc_smax; 446 else 447 limit = limits->sel_warnmax; 448 lmtemp_temp_write(sc, LM77_REG_THIGH_SET_POINT, limit, 0); 449 } 450 if (*props & PROP_WARNMIN) { 451 if (limits == NULL) /* Restore defaults */ 452 limit = sc->sc_smin; 453 else 454 limit = limits->sel_warnmin; 455 lmtemp_temp_write(sc, LM77_REG_TLOW_SET_POINT, limit, 0); 456 } 457 iic_release_bus(sc->sc_tag, 0); 458 } 459 460 static uint32_t 461 lmtemp_decode_lm75(const uint8_t *buf, int degc) 462 { 463 int temp; 464 uint32_t val; 465 466 /* 467 * LM75 temps are the most-significant 9 bits of a 16-bit reg. 468 * sign-extend the MSB and add in the 0.5 from the LSB 469 */ 470 temp = (int8_t) buf[0]; 471 temp = (temp << 1) + ((buf[1] >> 7) & 0x1); 472 473 /* Temp is given in 1/2 deg. C, we convert to C or uK. */ 474 if (degc) 475 val = temp / 2; 476 else 477 val = temp * 500000 + 273150000; 478 479 return val; 480 } 481 482 static uint32_t 483 lmtemp_decode_ds75(const uint8_t *buf, int degc) 484 { 485 int temp; 486 487 /* 488 * Sign-extend the MSB byte, and add in the fractions of a 489 * degree contained in the LSB (precision 1/16th DegC). 490 */ 491 temp = (int8_t)buf[0]; 492 temp = (temp << 4) | ((buf[1] >> 4) & 0xf); 493 494 /* 495 * Conversion to C or uK is simple. 496 */ 497 if (degc) 498 return temp / 16; 499 else 500 return (temp * 62500 + 273150000); 501 } 502 503 static uint32_t 504 lmtemp_decode_lm77(const uint8_t *buf, int degc) 505 { 506 int temp; 507 uint32_t val; 508 509 /* 510 * Describe each bits of temperature registers on LM77. 511 * D15 - D12: Sign 512 * D11 - D3 : Bit8(MSB) - Bit0 513 */ 514 temp = (int8_t)buf[0]; 515 temp = (temp << 5) | ((buf[1] >> 3) & 0x1f); 516 517 /* Temp is given in 1/2 deg. C, we convert to C or uK. */ 518 if (degc) 519 val = temp / 2; 520 else 521 val = temp * 500000 + 273150000; 522 523 return val; 524 } 525 526 static void lmtemp_encode_lm75(const uint32_t val, uint8_t *buf, int degc) 527 { 528 int temp; 529 530 /* Convert from C or uK to register format */ 531 if (degc) 532 temp = val * 2; 533 else 534 temp = (val - 273150000) / 500000; 535 buf[0] = (temp >> 1) & 0xff; 536 buf[1] = (temp & 1) << 7; 537 } 538 539 static void lmtemp_encode_ds75(const uint32_t val, uint8_t *buf, int degc) 540 { 541 int temp; 542 543 /* Convert from C or uK to register format */ 544 if (degc) 545 temp = val * 16; 546 else 547 temp = (val - 273150000) / 62500; 548 buf[0] = (temp >> 4) & 0xff; 549 buf[1] = (temp & 0xf) << 4; 550 } 551 552 static void lmtemp_encode_lm77(const uint32_t val, uint8_t *buf, int degc) 553 { 554 int temp; 555 556 /* Convert from C or uK to register format */ 557 if (degc) 558 temp = val * 2; 559 else 560 temp = (val - 273150000) / 500000; 561 buf[0] = (temp >> 5) & 0xff; 562 buf[1] = (temp & 0x1f) << 3; 563 } 564 565 static void 566 lmtemp_setup_sysctl(struct lmtemp_softc *sc) 567 { 568 const struct sysctlnode *me = NULL, *node = NULL; 569 570 sysctl_createv(NULL, 0, NULL, &me, 571 CTLFLAG_READWRITE, 572 CTLTYPE_NODE, device_xname(sc->sc_dev), NULL, 573 NULL, 0, NULL, 0, 574 CTL_MACHDEP, CTL_CREATE, CTL_EOL); 575 576 sysctl_createv(NULL, 0, NULL, &node, 577 CTLFLAG_READWRITE | CTLFLAG_OWNDESC, 578 CTLTYPE_INT, "temp", "Threshold temperature", 579 sysctl_lm75_temp, 1, (void *)sc, 0, 580 CTL_MACHDEP, me->sysctl_num, CTL_CREATE, CTL_EOL); 581 } 582 583 static int 584 sysctl_lm75_temp(SYSCTLFN_ARGS) 585 { 586 struct sysctlnode node = *rnode; 587 struct lmtemp_softc *sc = node.sysctl_data; 588 int temp; 589 590 if (newp) { 591 592 /* we're asked to write */ 593 node.sysctl_data = &sc->sc_tmax; 594 if (sysctl_lookup(SYSCTLFN_CALL(&node)) == 0) { 595 596 temp = *(int *)node.sysctl_data; 597 sc->sc_tmax = temp; 598 iic_acquire_bus(sc->sc_tag, I2C_F_POLL); 599 lmtemp_temp_write(sc, LM75_REG_THYST_SET_POINT, 600 sc->sc_tmax - 5, 1); 601 lmtemp_temp_write(sc, LM75_REG_TOS_SET_POINT, 602 sc->sc_tmax, 1); 603 iic_release_bus(sc->sc_tag, I2C_F_POLL); 604 605 /* Synchronise envsys - calls lmtemp_getlim_lm75() */ 606 sysmon_envsys_update_limits(sc->sc_sme, &sc->sc_sensor); 607 return 0; 608 } 609 return EINVAL; 610 } else { 611 612 node.sysctl_data = &sc->sc_tmax; 613 node.sysctl_size = 4; 614 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 615 } 616 617 return 0; 618 } 619 620 SYSCTL_SETUP(sysctl_lmtemp_setup, "sysctl lmtemp subtree setup") 621 { 622 623 sysctl_createv(NULL, 0, NULL, NULL, 624 CTLFLAG_PERMANENT, 625 CTLTYPE_NODE, "machdep", NULL, 626 NULL, 0, NULL, 0, 627 CTL_MACHDEP, CTL_EOL); 628 } 629 630 631
Indexes created Thu Oct 02 14:10:14 GMT 2025