adm1026.c revision 1.3
1 /*- 2 * Copyright (c) 2015 The NetBSD Foundation, Inc. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to The NetBSD Foundation 6 * by Julian Coleman. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 27 * POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __KERNEL_RCSID(0, "$NetBSD: adm1026.c,v 1.3 2018/06/16 21:22:13 thorpej Exp $"); 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/device.h> 36 #include <sys/kernel.h> 37 #include <sys/sysctl.h> 38 39 #include <dev/sysmon/sysmonvar.h> 40 41 #include <dev/i2c/i2cvar.h> 42 #include <dev/i2c/adm1026reg.h> 43 44 /* Voltage/analog sensors descriptions and registers */ 45 struct adm1026_volts_info { 46 const char* desc; 47 int incr; 48 uint8_t reg, check_tdm2; 49 }; 50 51 /* Voltage maximums (in mV) from datasheet table 7 divided by 255 increments */ 52 static struct adm1026_volts_info adm1026_volts_table[] = { 53 { "Vbatt", 15624, ADM1026_VBAT_VAL, 0 }, 54 { "V3.3 standby", 17345, ADM1026_33VSTBY_VAL, 0 }, 55 { "V3.3 main", 17345, ADM1026_33VMAIN_VAL, 0 }, 56 { "V5.0", 26016, ADM1026_50V_VAL, 0 }, 57 { "Vccp", 11718, ADM1026_VCCP_VAL, 0 }, 58 { "V+12", 62502, ADM1026_12V_VAL, 0 }, 59 { "V-12", -62502, ADM1026_N12V_VAL, 0 }, 60 { "V3.0 0", 11718, ADM1026_AIN_VAL(0), 0 }, 61 { "V3.0 1", 11718, ADM1026_AIN_VAL(1), 0 }, 62 { "V3.0 2", 11718, ADM1026_AIN_VAL(2), 0 }, 63 { "V3.0 3", 11718, ADM1026_AIN_VAL(3), 0 }, 64 { "V3.0 4", 11718, ADM1026_AIN_VAL(4), 0 }, 65 { "V3.0 5", 11718, ADM1026_AIN_VAL(5), 0 }, 66 { "V2.5 0", 9765, ADM1026_AIN_VAL(6), 0 }, 67 { "V2.5 1", 9765, ADM1026_AIN_VAL(7), 0 }, 68 { "V2.5 2", 9765, ADM1026_AIN8_VAL, 1 }, 69 { "V2.5 3", 9765, ADM1026_TDM2_AIN9_VAL, 1 } 70 }; 71 72 /* Maximum number of each type of sensor */ 73 #define ADM1026_MAX_FANS 8 74 #define ADM1026_MAX_TEMPS 3 75 #define ADM1026_MAX_VOLTS (sizeof(adm1026_volts_table) / \ 76 sizeof (adm1026_volts_table[0])) 77 78 /* Map sensor to/from sysmon numbers */ 79 #define ADM1026_FAN_NUM(x) (x) 80 #define ADM1026_TEMP_NUM(x) (x + sc->sc_nfans) 81 #define ADM1026_VOLT_NUM(x) (x + sc->sc_nfans + sc->sc_ntemps) 82 #define ADM1026_NUM_FAN(x) (x) 83 #define ADM1026_NUM_TEMP(x) (x - sc->sc_nfans) 84 #define ADM1026_NUM_VOLT(x) (x - sc->sc_nfans - sc->sc_ntemps) 85 86 struct adm1026_softc { 87 device_t sc_dev; 88 i2c_tag_t sc_tag; 89 int sc_address; 90 int sc_iic_flags; 91 bool sc_multi_read; 92 93 uint8_t sc_rev, sc_cfg[2]; 94 int sc_nfans, sc_ntemps; /* Map sysmon numbers to sensors */ 95 int sc_fandiv[ADM1026_MAX_FANS], sc_temp_off[ADM1026_MAX_TEMPS]; 96 struct sysmon_envsys *sc_sme; 97 envsys_data_t sc_sensor[ADM1026_MAX_FANS + ADM1026_MAX_TEMPS + 98 ADM1026_MAX_VOLTS]; 99 }; 100 101 static int adm1026_match(device_t, cfdata_t, void *); 102 static int adm1026_ident(struct adm1026_softc *sc); 103 static void adm1026_attach(device_t, device_t, void *); 104 static int adm1026_detach(device_t, int); 105 bool adm1026_pmf_suspend(device_t dev, const pmf_qual_t *qual); 106 bool adm1026_pmf_resume(device_t dev, const pmf_qual_t *qual); 107 108 static void adm1026_setup_fans(struct adm1026_softc *sc, int div2_val); 109 static void adm1026_setup_temps(struct adm1026_softc *sc); 110 static void adm1026_setup_volts(struct adm1026_softc *sc); 111 112 void adm1026_refresh(struct sysmon_envsys *sme, envsys_data_t *edata); 113 static void adm1026_read_fan(struct adm1026_softc *sc, envsys_data_t *edata); 114 static void adm1026_read_temp(struct adm1026_softc *sc, envsys_data_t *edata); 115 static void adm1026_read_volt(struct adm1026_softc *sc, envsys_data_t *edata); 116 117 static int adm1026_read_reg(struct adm1026_softc *sc, 118 uint8_t reg, uint8_t *val); 119 static int adm1026_write_reg(struct adm1026_softc *sc, 120 uint8_t reg, uint8_t val); 121 122 CFATTACH_DECL_NEW(adm1026hm, sizeof(struct adm1026_softc), 123 adm1026_match, adm1026_attach, adm1026_detach, NULL); 124 125 static const char * adm1026_compats[] = { 126 "i2c-adm1026", 127 NULL 128 }; 129 130 static int 131 adm1026_match(device_t parent, cfdata_t cf, void *aux) 132 { 133 struct i2c_attach_args *ia = aux; 134 struct adm1026_softc sc; /* For chip ident */ 135 int match_result; 136 137 sc.sc_tag = ia->ia_tag; 138 sc.sc_address = ia->ia_addr; 139 sc.sc_iic_flags = 0; 140 141 if (iic_use_direct_match(ia, cf, adm1026_compats, &match_result)) 142 return match_result; 143 144 if ((ia->ia_addr & ADM1026_ADDRMASK) == ADM1026_ADDR && 145 adm1026_ident(&sc)) 146 return I2C_MATCH_ADDRESS_AND_PROBE; 147 148 return 0; 149 } 150 151 static int 152 adm1026_ident(struct adm1026_softc *sc) 153 { 154 uint8_t val; 155 int err; 156 157 /* Manufacturer ID and revision/stepping */ 158 err = adm1026_read_reg(sc, ADM1026_ID, &val); 159 if (err || val != ADM1026_MANF_ID) { 160 aprint_verbose("adm1026_ident: " 161 "manufacturer ID invalid or missing\n"); 162 return 0; 163 } 164 err = adm1026_read_reg(sc, ADM1026_REV, &sc->sc_rev); 165 if (err || ADM1026_REVISION(sc->sc_rev) != ADM1026_MANF_REV) { 166 aprint_verbose("adm1026_ident: " 167 "manufacturer revision invalid or missing\n"); 168 return 0; 169 } 170 return 1; 171 } 172 173 static void 174 adm1026_attach(device_t parent, device_t self, void *aux) 175 { 176 struct adm1026_softc *sc = device_private(self); 177 struct i2c_attach_args *ia = aux; 178 prop_dictionary_t props = device_properties(self); 179 uint8_t val, fan_div2; 180 int err, div2_val; 181 182 sc->sc_tag = ia->ia_tag; 183 sc->sc_address = ia->ia_addr; 184 sc->sc_dev = self; 185 sc->sc_iic_flags = I2C_F_POLL; /* Use polling during autoconf */ 186 187 sc->sc_multi_read = false; 188 prop_dictionary_get_bool(props, "multi_read", &sc->sc_multi_read); 189 if (prop_dictionary_get_uint8(props, "fan_div2", &fan_div2) != 0) 190 div2_val = fan_div2; 191 else 192 div2_val = -1; 193 194 (void) adm1026_ident(sc); 195 aprint_normal(": ADM1026 hardware monitor: rev. 0x%x, step. 0x%x\n", 196 ADM1026_REVISION(sc->sc_rev), ADM1026_STEPPING(sc->sc_rev)); 197 198 /* 199 * Start monitoring if not already monitoring. 200 * Wait 1.8s for the fan readings to stabilise. 201 */ 202 if ((err = adm1026_read_reg(sc, ADM1026_CONF1, &val)) != 0) { 203 aprint_error_dev(sc->sc_dev, ": unable to read conf1\n"); 204 return; 205 } 206 if (!(val & ADM1026_CONF1_MONITOR)) { 207 aprint_normal_dev(sc->sc_dev, 208 ": starting monitoring, waiting 1.8s for readings\n"); 209 val |= ADM1026_CONF1_MONITOR; 210 if ((err = adm1026_write_reg(sc, ADM1026_CONF1, val)) != 0) { 211 aprint_error_dev(sc->sc_dev, 212 ": unable to write conf1\n"); 213 return; 214 } 215 delay(1800000); 216 } 217 sc->sc_cfg[0] = val; 218 219 sc->sc_sme = sysmon_envsys_create(); 220 sc->sc_nfans = 0; 221 adm1026_setup_fans(sc, div2_val); 222 sc->sc_ntemps = 0; 223 adm1026_setup_temps(sc); 224 adm1026_setup_volts(sc); 225 aprint_normal_dev(self, "%d fans, %d temperatures, %d voltages\n", 226 sc->sc_nfans, sc->sc_ntemps, sc->sc_ntemps == 3 ? 15 : 17); 227 228 sc->sc_sme->sme_name = device_xname(self); 229 sc->sc_sme->sme_cookie = sc; 230 sc->sc_sme->sme_refresh = adm1026_refresh; 231 if (sysmon_envsys_register(sc->sc_sme)) { 232 aprint_error_dev(self, 233 "unable to register with sysmon\n"); 234 sysmon_envsys_destroy(sc->sc_sme); 235 return; 236 } 237 238 if (!pmf_device_register(self, adm1026_pmf_suspend, adm1026_pmf_resume)) 239 aprint_error_dev(self, "couldn't establish power handler\n"); 240 241 sc->sc_iic_flags = 0; /* Drop polling flag */ 242 243 return; 244 } 245 246 /* 247 * We could stop (suspend/detach) and restart (resume) monitoring, 248 * but we don't do that because some machines have separate 249 * management hardware which can read the sensors. 250 */ 251 bool 252 adm1026_pmf_suspend(device_t dev, const pmf_qual_t *qual) 253 { 254 return true; 255 } 256 257 bool 258 adm1026_pmf_resume(device_t dev, const pmf_qual_t *qual) 259 { 260 return true; 261 } 262 263 static int 264 adm1026_detach(device_t self, int flags) 265 { 266 struct adm1026_softc *sc = device_private(self); 267 268 pmf_device_deregister(self); 269 270 sysmon_envsys_unregister(sc->sc_sme); 271 sc->sc_sme = NULL; 272 273 return 0; 274 } 275 276 static void 277 adm1026_setup_fans(struct adm1026_softc *sc, int div2_val) 278 { 279 int i, err = 0; 280 uint8_t div1, div2; 281 282 /* Read fan-related registers (configuration and divisors) */ 283 if ((err = adm1026_read_reg(sc, ADM1026_CONF2, &sc->sc_cfg[1])) != 0) { 284 aprint_error_dev(sc->sc_dev, "unable to read conf2\n"); 285 return; 286 } 287 if ((err = adm1026_read_reg(sc, ADM1026_FAN_DIV1, &div1)) != 0) { 288 aprint_error_dev(sc->sc_dev, "unable to read fan_div1\n"); 289 return; 290 } 291 sc->sc_fandiv[0] = 1 << ADM1026_FAN0_DIV(div1); 292 sc->sc_fandiv[1] = 1 << ADM1026_FAN1_DIV(div1); 293 sc->sc_fandiv[2] = 1 << ADM1026_FAN2_DIV(div1); 294 sc->sc_fandiv[3] = 1 << ADM1026_FAN3_DIV(div1); 295 if (div2_val < 0) { 296 if ((err = 297 adm1026_read_reg(sc, ADM1026_FAN_DIV2, &div2)) != 0) { 298 aprint_error_dev(sc->sc_dev, 299 "unable to read fan_div2\n"); 300 return; 301 } 302 } else 303 div2 = div2_val; 304 sc->sc_fandiv[4] = 1 << ADM1026_FAN4_DIV(div2); 305 sc->sc_fandiv[5] = 1 << ADM1026_FAN5_DIV(div2); 306 sc->sc_fandiv[6] = 1 << ADM1026_FAN6_DIV(div2); 307 sc->sc_fandiv[7] = 1 << ADM1026_FAN7_DIV(div2); 308 309 for (i = 0; i < ADM1026_MAX_FANS; i++) { 310 sc->sc_sensor[ADM1026_FAN_NUM(i)].state = ENVSYS_SINVALID; 311 /* Check configuration2 register to see which pins are fans. */ 312 if (ADM1026_PIN_IS_FAN(sc->sc_cfg[1], i)) { 313 sc->sc_sensor[ADM1026_FAN_NUM(i)].units = 314 ENVSYS_SFANRPM; 315 snprintf(sc->sc_sensor[ADM1026_FAN_NUM(i)].desc, 316 sizeof(sc->sc_sensor[ADM1026_FAN_NUM(i)].desc), 317 "fan %d", ADM1026_FAN_NUM(i)); 318 sc->sc_nfans++; 319 if (sysmon_envsys_sensor_attach( 320 sc->sc_sme, &sc->sc_sensor[ADM1026_FAN_NUM(i)])) { 321 sysmon_envsys_destroy(sc->sc_sme); 322 aprint_error_dev(sc->sc_dev, 323 "unable to attach fan %d at sysmon\n", i); 324 return; 325 } 326 } 327 } 328 } 329 330 static void 331 adm1026_setup_temps(struct adm1026_softc *sc) 332 { 333 int i; 334 uint8_t val; 335 336 /* Temperature offsets */ 337 if (adm1026_read_reg(sc, ADM1026_INT_TEMP_OFF, &val) 338 != 0) { 339 aprint_error_dev(sc->sc_dev, "unable to read int temp. off.\n"); 340 return; 341 } 342 if (val & 0x80) 343 sc->sc_temp_off[0] = 0 - 1000000 * (val & 0x7f); 344 else 345 sc->sc_temp_off[0] = 1000000 * (val & 0x7f); 346 if (adm1026_read_reg(sc, ADM1026_TDM1_OFF, &val) != 0) { 347 aprint_error_dev(sc->sc_dev, "unable to read tdm1 off.\n"); 348 return; 349 } 350 if (val & 0x80) 351 sc->sc_temp_off[1] = 0 - 1000000 * (val & 0x7f); 352 else 353 sc->sc_temp_off[1] = 1000000 * (val & 0x7f); 354 if (adm1026_read_reg(sc, ADM1026_TDM2_OFF, &val) != 0) { 355 aprint_error_dev(sc->sc_dev, "unable to read tdm2 off.\n"); 356 return; 357 } 358 if (val & 0x80) 359 sc->sc_temp_off[2] = 0 - 1000000 * (val & 0x7f); 360 else 361 sc->sc_temp_off[2] = 1000000 * (val & 0x7f); 362 363 strlcpy(sc->sc_sensor[ADM1026_TEMP_NUM(0)].desc, "internal", 364 sizeof(sc->sc_sensor[ADM1026_TEMP_NUM(0)].desc)); 365 strlcpy(sc->sc_sensor[ADM1026_TEMP_NUM(1)].desc, "external 1", 366 sizeof(sc->sc_sensor[ADM1026_TEMP_NUM(1)].desc)); 367 strlcpy(sc->sc_sensor[ADM1026_TEMP_NUM(2)].desc, "external 2", 368 sizeof(sc->sc_sensor[ADM1026_TEMP_NUM(2)].desc)); 369 for (i = 0; i < ADM1026_MAX_TEMPS; i++) { 370 /* Check configuration1 register to see if TDM2 is configured */ 371 if (i == 2 && !ADM1026_PIN_IS_TDM2(sc->sc_cfg[0])) 372 continue; 373 sc->sc_sensor[ADM1026_TEMP_NUM(i)].units = ENVSYS_STEMP; 374 sc->sc_sensor[ADM1026_TEMP_NUM(i)].state = ENVSYS_SINVALID; 375 sc->sc_ntemps++; 376 if (sysmon_envsys_sensor_attach( 377 sc->sc_sme, &sc->sc_sensor[ADM1026_TEMP_NUM(i)])) { 378 sysmon_envsys_destroy(sc->sc_sme); 379 aprint_error_dev(sc->sc_dev, 380 "unable to attach temp %d at sysmon\n", i); 381 return; 382 } 383 } 384 } 385 386 static void 387 adm1026_setup_volts(struct adm1026_softc *sc) 388 { 389 int i; 390 391 for (i = 0; i < ADM1026_MAX_VOLTS; i++) { 392 /* Check configuration1 register to see if TDM2 is configured */ 393 if (adm1026_volts_table[i].check_tdm2 && 394 ADM1026_PIN_IS_TDM2(sc->sc_cfg[0])) 395 continue; 396 strlcpy(sc->sc_sensor[ADM1026_VOLT_NUM(i)].desc, 397 adm1026_volts_table[i].desc, 398 sizeof(sc->sc_sensor[ADM1026_VOLT_NUM(i)].desc)); 399 sc->sc_sensor[ADM1026_VOLT_NUM(i)].units = ENVSYS_SVOLTS_DC; 400 sc->sc_sensor[ADM1026_VOLT_NUM(i)].state = ENVSYS_SINVALID; 401 if (sysmon_envsys_sensor_attach( 402 sc->sc_sme, &sc->sc_sensor[ADM1026_VOLT_NUM(i)])) { 403 sysmon_envsys_destroy(sc->sc_sme); 404 aprint_error_dev(sc->sc_dev, 405 "unable to attach volts %d at sysmon\n", i); 406 return; 407 } 408 } 409 } 410 411 void 412 adm1026_refresh(struct sysmon_envsys *sme, envsys_data_t *edata) 413 { 414 struct adm1026_softc *sc = sme->sme_cookie; 415 416 if (edata->sensor < sc->sc_nfans) 417 adm1026_read_fan(sc, edata); 418 else if (edata->sensor < sc->sc_nfans + sc->sc_ntemps) 419 adm1026_read_temp(sc, edata); 420 else 421 adm1026_read_volt(sc, edata); 422 } 423 424 static void 425 adm1026_read_fan(struct adm1026_softc *sc, envsys_data_t *edata) 426 { 427 int fan = ADM1026_NUM_FAN(edata->sensor); 428 int err; 429 uint8_t val; 430 431 if ((err = adm1026_read_reg(sc, ADM1026_FAN_VAL(fan), &val)) != 0) { 432 edata->state = ENVSYS_SINVALID; 433 return; 434 } 435 if (val == 0xff || val == 0x00) /* Fan missing or stopped */ 436 edata->value_cur = 0; 437 else 438 edata->value_cur = 1350000 / (val * sc->sc_fandiv[fan]); 439 edata->state = ENVSYS_SVALID; 440 } 441 442 static void 443 adm1026_read_temp(struct adm1026_softc *sc, envsys_data_t *edata) 444 { 445 int temp = ADM1026_NUM_TEMP(edata->sensor); 446 int err; 447 uint8_t val; 448 449 if (temp == 0) 450 err = adm1026_read_reg(sc, ADM1026_INT_TEMP_VAL, &val); 451 else if (temp == 1) 452 err = adm1026_read_reg(sc, ADM1026_TDM1_VAL, &val); 453 else 454 err = adm1026_read_reg(sc, ADM1026_TDM2_AIN9_VAL, &val); 455 if (err) { 456 edata->state = ENVSYS_SINVALID; 457 return; 458 } 459 460 if (val & 0x80) /* Negative temperature */ 461 edata->value_cur = 273150000 - sc->sc_temp_off[temp] - 462 1000000 * (val & 0x7f); 463 else /* Positive temperature */ 464 edata->value_cur = 273150000 - sc->sc_temp_off[temp] + 465 1000000 * val; 466 edata->state = ENVSYS_SVALID; 467 } 468 469 static void 470 adm1026_read_volt(struct adm1026_softc *sc, envsys_data_t *edata) 471 { 472 int volt = ADM1026_NUM_VOLT(edata->sensor); 473 int err; 474 uint8_t val; 475 476 err = adm1026_read_reg(sc, adm1026_volts_table[volt].reg, &val); 477 if (err) { 478 edata->state = ENVSYS_SINVALID; 479 return; 480 } 481 /* Vbatt is not valid for < 1.5V */ 482 if (volt == 0 && val < 0x60) 483 edata->state = ENVSYS_SINVALID; 484 edata->value_cur = (int) val * adm1026_volts_table[volt].incr; 485 edata->state = ENVSYS_SVALID; 486 } 487 488 static int 489 adm1026_read_reg(struct adm1026_softc *sc, uint8_t reg, uint8_t *val) 490 { 491 #define ADM1026_READ_RETRIES 5 492 int i, j, err = 0; 493 uint8_t creg, cval, tmp[ADM1026_READ_RETRIES + 1]; 494 495 if ((err = iic_acquire_bus(sc->sc_tag, sc->sc_iic_flags)) != 0) 496 return err; 497 /* Standard ADM1026 */ 498 if (sc->sc_multi_read == false) { 499 err = iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, 500 sc->sc_address, ®, 1, val, 1, 0); 501 /* 502 * The ADM1026 found in some Sun machines sometimes reads bogus values. 503 * We'll read at least twice and check that we get (nearly) the same 504 * value. If not, we'll read another register and then re-read the 505 * first. 506 */ 507 } else { 508 if (reg == ADM1026_CONF1) 509 creg = ADM1026_CONF2; 510 else 511 creg = ADM1026_CONF1; 512 if ((err = iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, 513 sc->sc_address, ®, 1, &tmp[0], 1, 0)) != 0) { 514 iic_release_bus(sc->sc_tag, sc->sc_iic_flags); 515 return err; 516 } 517 for (i = 1; i <= ADM1026_READ_RETRIES; i++) { 518 if ((err = iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, 519 sc->sc_address, ®, 1, &tmp[i], 1, 0)) != 0) 520 break; 521 for (j = 0; j < i; j++) 522 if (abs(tmp[j] - tmp[i]) < 3) { 523 *val = tmp[i]; 524 iic_release_bus(sc->sc_tag, 525 sc->sc_iic_flags); 526 return 0; 527 } 528 if ((err = iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, 529 sc->sc_address, &creg, 1, &cval, 1, 0)) != 0) 530 break; 531 err = -1; /* Return error if we don't match. */ 532 } 533 } 534 iic_release_bus(sc->sc_tag, sc->sc_iic_flags); 535 return err; 536 } 537 538 static int 539 adm1026_write_reg(struct adm1026_softc *sc, uint8_t reg, uint8_t val) 540 { 541 int err = 0; 542 543 if ((err = iic_acquire_bus(sc->sc_tag, sc->sc_iic_flags)) != 0) 544 return err; 545 err = iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, sc->sc_address, 546 ®, 1, &val, 1, 0); 547 iic_release_bus(sc->sc_tag, sc->sc_iic_flags); 548 return err; 549 } 550
Indexes created Mon Oct 13 05:10:05 GMT 2025