adm1026.c revision 1.1
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 1.1 2015/12/16 07:56:48 jdc 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 sc.sc_tag = ia->ia_tag; 136 sc.sc_address = ia->ia_addr; 137 sc.sc_iic_flags = 0; 138 139 /* Direct config - match compats */ 140 if (ia->ia_name) { 141 if (ia->ia_ncompat > 0) { 142 if (iic_compat_match(ia, adm1026_compats)) 143 return 1; 144 } 145 /* Indirect config - check address and chip ID/rev. */ 146 } else { 147 if ((ia->ia_addr & ADM1026_ADDRMASK) == ADM1026_ADDR && 148 adm1026_ident(&sc)) 149 return 1; 150 } 151 152 return 0; 153 } 154 155 static int 156 adm1026_ident(struct adm1026_softc *sc) 157 { 158 uint8_t val; 159 int err; 160 161 /* Manufacturer ID and revision/stepping */ 162 err = adm1026_read_reg(sc, ADM1026_ID, &val); 163 if (err || val != ADM1026_MANF_ID) { 164 aprint_verbose("adm1026_ident: " 165 "manufacturer ID invalid or missing\n"); 166 return 0; 167 } 168 err = adm1026_read_reg(sc, ADM1026_REV, &sc->sc_rev); 169 if (err || ADM1026_REVISION(sc->sc_rev) != ADM1026_MANF_REV) { 170 aprint_verbose("adm1026_ident: " 171 "manufacturer revision invalid or missing\n"); 172 return 0; 173 } 174 return 1; 175 } 176 177 static void 178 adm1026_attach(device_t parent, device_t self, void *aux) 179 { 180 struct adm1026_softc *sc = device_private(self); 181 struct i2c_attach_args *ia = aux; 182 prop_dictionary_t props = device_properties(self); 183 uint8_t val, fan_div2; 184 int err, div2_val; 185 186 sc->sc_tag = ia->ia_tag; 187 sc->sc_address = ia->ia_addr; 188 sc->sc_dev = self; 189 sc->sc_iic_flags = I2C_F_POLL; /* Use polling during autoconf */ 190 191 sc->sc_multi_read = false; 192 prop_dictionary_get_bool(props, "multi_read", &sc->sc_multi_read); 193 if (prop_dictionary_get_uint8(props, "fan_div2", &fan_div2) != 0) 194 div2_val = fan_div2; 195 else 196 div2_val = -1; 197 198 (void) adm1026_ident(sc); 199 aprint_normal(": ADM1026 hardware monitor: rev. 0x%x, step. 0x%x\n", 200 ADM1026_REVISION(sc->sc_rev), ADM1026_STEPPING(sc->sc_rev)); 201 202 /* 203 * Start monitoring if not already monitoring. 204 * Wait 1.8s for the fan readings to stabilise. 205 */ 206 if ((err = adm1026_read_reg(sc, ADM1026_CONF1, &val)) != 0) { 207 aprint_error_dev(sc->sc_dev, ": unable to read conf1\n"); 208 return; 209 } 210 if (!(val & ADM1026_CONF1_MONITOR)) { 211 aprint_normal_dev(sc->sc_dev, 212 ": starting monitoring, waiting 1.8s for readings\n"); 213 val |= ADM1026_CONF1_MONITOR; 214 if ((err = adm1026_write_reg(sc, ADM1026_CONF1, val)) != 0) { 215 aprint_error_dev(sc->sc_dev, 216 ": unable to write conf1\n"); 217 return; 218 } 219 delay(1800000); 220 } 221 sc->sc_cfg[0] = val; 222 223 sc->sc_sme = sysmon_envsys_create(); 224 sc->sc_nfans = 0; 225 adm1026_setup_fans(sc, div2_val); 226 sc->sc_ntemps = 0; 227 adm1026_setup_temps(sc); 228 adm1026_setup_volts(sc); 229 aprint_normal_dev(self, "%d fans, %d temperatures, %d voltages\n", 230 sc->sc_nfans, sc->sc_ntemps, sc->sc_ntemps == 3 ? 15 : 17); 231 232 sc->sc_sme->sme_name = device_xname(self); 233 sc->sc_sme->sme_cookie = sc; 234 sc->sc_sme->sme_refresh = adm1026_refresh; 235 if (sysmon_envsys_register(sc->sc_sme)) { 236 aprint_error_dev(self, 237 "unable to register with sysmon\n"); 238 sysmon_envsys_destroy(sc->sc_sme); 239 return; 240 } 241 242 if (!pmf_device_register(self, adm1026_pmf_suspend, adm1026_pmf_resume)) 243 aprint_error_dev(self, "couldn't establish power handler\n"); 244 245 sc->sc_iic_flags = 0; /* Drop polling flag */ 246 247 return; 248 } 249 250 /* 251 * We could stop (suspend/detach) and restart (resume) monitoring, 252 * but we don't do that because some machines have separate 253 * management hardware which can read the sensors. 254 */ 255 bool 256 adm1026_pmf_suspend(device_t dev, const pmf_qual_t *qual) 257 { 258 return true; 259 } 260 261 bool 262 adm1026_pmf_resume(device_t dev, const pmf_qual_t *qual) 263 { 264 return true; 265 } 266 267 static int 268 adm1026_detach(device_t self, int flags) 269 { 270 struct adm1026_softc *sc = device_private(self); 271 272 pmf_device_deregister(self); 273 274 sysmon_envsys_unregister(sc->sc_sme); 275 sc->sc_sme = NULL; 276 277 return 0; 278 } 279 280 static void 281 adm1026_setup_fans(struct adm1026_softc *sc, int div2_val) 282 { 283 int i, err = 0; 284 uint8_t div1, div2; 285 286 /* Read fan-related registers (configuration and divisors) */ 287 if ((err = adm1026_read_reg(sc, ADM1026_CONF2, &sc->sc_cfg[1])) != 0) { 288 aprint_error_dev(sc->sc_dev, "unable to read conf2\n"); 289 return; 290 } 291 if ((err = adm1026_read_reg(sc, ADM1026_FAN_DIV1, &div1)) != 0) { 292 aprint_error_dev(sc->sc_dev, "unable to read fan_div1\n"); 293 return; 294 } 295 sc->sc_fandiv[0] = 1 << ADM1026_FAN0_DIV(div1); 296 sc->sc_fandiv[1] = 1 << ADM1026_FAN1_DIV(div1); 297 sc->sc_fandiv[2] = 1 << ADM1026_FAN2_DIV(div1); 298 sc->sc_fandiv[3] = 1 << ADM1026_FAN3_DIV(div1); 299 if (div2_val < 0) { 300 if ((err = 301 adm1026_read_reg(sc, ADM1026_FAN_DIV2, &div2)) != 0) { 302 aprint_error_dev(sc->sc_dev, 303 "unable to read fan_div2\n"); 304 return; 305 } 306 } else 307 div2 = div2_val; 308 sc->sc_fandiv[4] = 1 << ADM1026_FAN4_DIV(div2); 309 sc->sc_fandiv[5] = 1 << ADM1026_FAN5_DIV(div2); 310 sc->sc_fandiv[6] = 1 << ADM1026_FAN6_DIV(div2); 311 sc->sc_fandiv[7] = 1 << ADM1026_FAN7_DIV(div2); 312 313 for (i = 0; i < ADM1026_MAX_FANS; i++) { 314 sc->sc_sensor[ADM1026_FAN_NUM(i)].state = ENVSYS_SINVALID; 315 /* Check configuration2 register to see which pins are fans. */ 316 if (ADM1026_PIN_IS_FAN(sc->sc_cfg[1], i)) { 317 sc->sc_sensor[ADM1026_FAN_NUM(i)].units = 318 ENVSYS_SFANRPM; 319 snprintf(sc->sc_sensor[ADM1026_FAN_NUM(i)].desc, 320 sizeof(sc->sc_sensor[ADM1026_FAN_NUM(i)].desc), 321 "fan %d", ADM1026_FAN_NUM(i)); 322 sc->sc_nfans++; 323 if (sysmon_envsys_sensor_attach( 324 sc->sc_sme, &sc->sc_sensor[ADM1026_FAN_NUM(i)])) { 325 sysmon_envsys_destroy(sc->sc_sme); 326 aprint_error_dev(sc->sc_dev, 327 "unable to attach fan %d at sysmon\n", i); 328 return; 329 } 330 } 331 } 332 } 333 334 static void 335 adm1026_setup_temps(struct adm1026_softc *sc) 336 { 337 int i; 338 uint8_t val; 339 340 /* Temperature offsets */ 341 if (adm1026_read_reg(sc, ADM1026_INT_TEMP_OFF, &val) 342 != 0) { 343 aprint_error_dev(sc->sc_dev, "unable to read int temp. off.\n"); 344 return; 345 } 346 if (val & 0x80) 347 sc->sc_temp_off[0] = 0 - 1000000 * (val & 0x7f); 348 else 349 sc->sc_temp_off[0] = 1000000 * (val & 0x7f); 350 if (adm1026_read_reg(sc, ADM1026_TDM1_OFF, &val) != 0) { 351 aprint_error_dev(sc->sc_dev, "unable to read tdm1 off.\n"); 352 return; 353 } 354 if (val & 0x80) 355 sc->sc_temp_off[1] = 0 - 1000000 * (val & 0x7f); 356 else 357 sc->sc_temp_off[1] = 1000000 * (val & 0x7f); 358 if (adm1026_read_reg(sc, ADM1026_TDM2_OFF, &val) != 0) { 359 aprint_error_dev(sc->sc_dev, "unable to read tdm2 off.\n"); 360 return; 361 } 362 if (val & 0x80) 363 sc->sc_temp_off[2] = 0 - 1000000 * (val & 0x7f); 364 else 365 sc->sc_temp_off[2] = 1000000 * (val & 0x7f); 366 367 strlcpy(sc->sc_sensor[ADM1026_TEMP_NUM(0)].desc, "internal", 368 sizeof(sc->sc_sensor[ADM1026_TEMP_NUM(0)].desc)); 369 strlcpy(sc->sc_sensor[ADM1026_TEMP_NUM(1)].desc, "external 1", 370 sizeof(sc->sc_sensor[ADM1026_TEMP_NUM(1)].desc)); 371 strlcpy(sc->sc_sensor[ADM1026_TEMP_NUM(2)].desc, "external 2", 372 sizeof(sc->sc_sensor[ADM1026_TEMP_NUM(2)].desc)); 373 for (i = 0; i < ADM1026_MAX_TEMPS; i++) { 374 /* Check configuration1 register to see if TDM2 is configured */ 375 if (i == 2 && !ADM1026_PIN_IS_TDM2(sc->sc_cfg[0])) 376 continue; 377 sc->sc_sensor[ADM1026_TEMP_NUM(i)].units = ENVSYS_STEMP; 378 sc->sc_sensor[ADM1026_TEMP_NUM(i)].state = ENVSYS_SINVALID; 379 sc->sc_ntemps++; 380 if (sysmon_envsys_sensor_attach( 381 sc->sc_sme, &sc->sc_sensor[ADM1026_TEMP_NUM(i)])) { 382 sysmon_envsys_destroy(sc->sc_sme); 383 aprint_error_dev(sc->sc_dev, 384 "unable to attach temp %d at sysmon\n", i); 385 return; 386 } 387 } 388 } 389 390 static void 391 adm1026_setup_volts(struct adm1026_softc *sc) 392 { 393 int i; 394 395 for (i = 0; i < ADM1026_MAX_VOLTS; i++) { 396 /* Check configuration1 register to see if TDM2 is configured */ 397 if (adm1026_volts_table[i].check_tdm2 && 398 ADM1026_PIN_IS_TDM2(sc->sc_cfg[0])) 399 continue; 400 strlcpy(sc->sc_sensor[ADM1026_VOLT_NUM(i)].desc, 401 adm1026_volts_table[i].desc, 402 sizeof(sc->sc_sensor[ADM1026_VOLT_NUM(i)].desc)); 403 sc->sc_sensor[ADM1026_VOLT_NUM(i)].units = ENVSYS_SVOLTS_DC; 404 sc->sc_sensor[ADM1026_VOLT_NUM(i)].state = ENVSYS_SINVALID; 405 if (sysmon_envsys_sensor_attach( 406 sc->sc_sme, &sc->sc_sensor[ADM1026_VOLT_NUM(i)])) { 407 sysmon_envsys_destroy(sc->sc_sme); 408 aprint_error_dev(sc->sc_dev, 409 "unable to attach volts %d at sysmon\n", i); 410 return; 411 } 412 } 413 } 414 415 void 416 adm1026_refresh(struct sysmon_envsys *sme, envsys_data_t *edata) 417 { 418 struct adm1026_softc *sc = sme->sme_cookie; 419 420 if (edata->sensor < sc->sc_nfans) 421 adm1026_read_fan(sc, edata); 422 else if (edata->sensor < sc->sc_nfans + sc->sc_ntemps) 423 adm1026_read_temp(sc, edata); 424 else 425 adm1026_read_volt(sc, edata); 426 } 427 428 static void 429 adm1026_read_fan(struct adm1026_softc *sc, envsys_data_t *edata) 430 { 431 int fan = ADM1026_NUM_FAN(edata->sensor); 432 int err; 433 uint8_t val; 434 435 if ((err = adm1026_read_reg(sc, ADM1026_FAN_VAL(fan), &val)) != 0) { 436 edata->state = ENVSYS_SINVALID; 437 return; 438 } 439 if (val == 0xff || val == 0x00) /* Fan missing or stopped */ 440 edata->value_cur = 0; 441 else 442 edata->value_cur = 1350000 / (val * sc->sc_fandiv[fan]); 443 edata->state = ENVSYS_SVALID; 444 } 445 446 static void 447 adm1026_read_temp(struct adm1026_softc *sc, envsys_data_t *edata) 448 { 449 int temp = ADM1026_NUM_TEMP(edata->sensor); 450 int err; 451 uint8_t val; 452 453 if (temp == 0) 454 err = adm1026_read_reg(sc, ADM1026_INT_TEMP_VAL, &val); 455 else if (temp == 1) 456 err = adm1026_read_reg(sc, ADM1026_TDM1_VAL, &val); 457 else 458 err = adm1026_read_reg(sc, ADM1026_TDM2_AIN9_VAL, &val); 459 if (err) { 460 edata->state = ENVSYS_SINVALID; 461 return; 462 } 463 464 if (val & 0x80) /* Negative temperature */ 465 edata->value_cur = 273150000 - sc->sc_temp_off[temp] - 466 1000000 * (val & 0x7f); 467 else /* Positive temperature */ 468 edata->value_cur = 273150000 - sc->sc_temp_off[temp] + 469 1000000 * val; 470 edata->state = ENVSYS_SVALID; 471 } 472 473 static void 474 adm1026_read_volt(struct adm1026_softc *sc, envsys_data_t *edata) 475 { 476 int volt = ADM1026_NUM_VOLT(edata->sensor); 477 int err; 478 uint8_t val; 479 480 err = adm1026_read_reg(sc, adm1026_volts_table[volt].reg, &val); 481 if (err) { 482 edata->state = ENVSYS_SINVALID; 483 return; 484 } 485 /* Vbatt is not valid for < 1.5V */ 486 if (volt == 0 && val < 0x60) 487 edata->state = ENVSYS_SINVALID; 488 edata->value_cur = (int) val * adm1026_volts_table[volt].incr; 489 edata->state = ENVSYS_SVALID; 490 } 491 492 static int 493 adm1026_read_reg(struct adm1026_softc *sc, uint8_t reg, uint8_t *val) 494 { 495 #define ADM1026_READ_RETRIES 4 496 int i, j, err = 0; 497 uint8_t creg, cval, tmp[ADM1026_READ_RETRIES + 1]; 498 499 if ((err = iic_acquire_bus(sc->sc_tag, sc->sc_iic_flags)) != 0) 500 return err; 501 /* Standard ADM1026 */ 502 if (sc->sc_multi_read == false) { 503 err = iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, 504 sc->sc_address, ®, 1, val, 1, 0); 505 /* 506 * The ADM1026 found in some Sun machines sometimes reads bogus values. 507 * We'll read at least twice and check that we get (nearly) the same 508 * value. If not, we'll read another register and then re-read the 509 * first. 510 */ 511 } else { 512 if (reg == ADM1026_CONF1) 513 creg = ADM1026_CONF2; 514 else 515 creg = ADM1026_CONF1; 516 if ((err = iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, 517 sc->sc_address, ®, 1, &tmp[0], 1, 0)) != 0) { 518 iic_release_bus(sc->sc_tag, sc->sc_iic_flags); 519 return err; 520 } 521 for (i = 1; i <= ADM1026_READ_RETRIES; i++) { 522 if ((err = iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, 523 sc->sc_address, ®, 1, &tmp[i], 1, 0)) != 0) 524 break; 525 for (j = 0; j < i; j++) 526 if (abs(tmp[j] - tmp[i]) < 3) { 527 *val = tmp[i]; 528 iic_release_bus(sc->sc_tag, 529 sc->sc_iic_flags); 530 return 0; 531 } 532 if ((err = iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, 533 sc->sc_address, &creg, 1, &cval, 1, 0)) != 0) 534 break; 535 err = -1; /* Return error if we don't match. */ 536 } 537 } 538 iic_release_bus(sc->sc_tag, sc->sc_iic_flags); 539 return err; 540 } 541 542 static int 543 adm1026_write_reg(struct adm1026_softc *sc, uint8_t reg, uint8_t val) 544 { 545 int err = 0; 546 547 if ((err = iic_acquire_bus(sc->sc_tag, sc->sc_iic_flags)) != 0) 548 return err; 549 err = iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, sc->sc_address, 550 ®, 1, &val, 1, 0); 551 iic_release_bus(sc->sc_tag, sc->sc_iic_flags); 552 return err; 553 } 554
Indexes created Wed Sep 24 05:09:52 GMT 2025