1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2012 Andreas Tobler
5 * Copyright (c) 2014 Justin Hibbits
6 * All rights reserved.
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 AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
22 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
24 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #include <sys/param.h>
31 #include <sys/bus.h>
32 #include <sys/systm.h>
33 #include <sys/module.h>
34 #include <sys/callout.h>
35 #include <sys/conf.h>
36 #include <sys/cpu.h>
37 #include <sys/ctype.h>
38 #include <sys/kernel.h>
39 #include <sys/reboot.h>
40 #include <sys/rman.h>
41 #include <sys/sysctl.h>
42 #include <sys/limits.h>
43
44 #include <machine/bus.h>
45 #include <machine/md_var.h>
46
47 #include <dev/iicbus/iicbus.h>
48 #include <dev/iicbus/iiconf.h>
49
50 #include <dev/ofw/openfirm.h>
51 #include <dev/ofw/ofw_bus.h>
52 #include <powerpc/powermac/powermac_thermal.h>
53
54 /* ADT746X registers. */
55 #define ADT746X_TACH1LOW 0x28
56 #define ADT746X_TACH1HIGH 0x29
57 #define ADT746X_TACH2LOW 0x2a
58 #define ADT746X_TACH2HIGH 0x2b
59 #define ADT746X_PWM1 0x30
60 #define ADT746X_PWM2 0x31
61 #define ADT746X_DEVICE_ID 0x3d
62 #define ADT746X_COMPANY_ID 0x3e
63 #define ADT746X_REV_ID 0x3f
64 #define ADT746X_CONFIG 0x40
65 #define ADT746X_PWM1_CONF 0x5c
66 #define ADT746X_PWM2_CONF 0x5d
67 #define ADT746X_MANUAL_MASK 0xe0
68
69 #define ADT7460_DEV_ID 0x27
70 #define ADT7467_DEV_ID 0x68
71
72 struct adt746x_fan {
73 struct pmac_fan fan;
74 device_t dev;
75 int id;
76 int setpoint;
77 int pwm_reg;
78 int conf_reg;
79 };
80
81 struct adt746x_sensor {
82 struct pmac_therm therm;
83 device_t dev;
84 int id;
85 cell_t reg;
86 enum {
87 ADT746X_SENSOR_TEMP,
88 ADT746X_SENSOR_VOLT,
89 ADT746X_SENSOR_SPEED
90 } type;
91 };
92
93 struct adt746x_softc {
94 device_t sc_dev;
95 struct intr_config_hook enum_hook;
96 uint32_t sc_addr;
97 /* The 7467 supports up to 4 fans, 2 voltage and 3 temperature sensors. */
98 struct adt746x_fan sc_fans[4];
99 int sc_nfans;
100 struct adt746x_sensor sc_sensors[9];
101 int sc_nsensors;
102 int device_id;
103
104 };
105
106
107 /* Regular bus attachment functions */
108
109 static int adt746x_probe(device_t);
110 static int adt746x_attach(device_t);
111
112
113 /* Utility functions */
114 static void adt746x_attach_fans(device_t dev);
115 static void adt746x_attach_sensors(device_t dev);
116 static int adt746x_fill_fan_prop(device_t dev);
117 static int adt746x_fill_sensor_prop(device_t dev);
118
119 static int adt746x_fan_set_pwm(struct adt746x_fan *fan, int pwm);
120 static int adt746x_fan_get_pwm(struct adt746x_fan *fan);
121 static int adt746x_sensor_read(struct adt746x_sensor *sens);
122 static void adt746x_start(void *xdev);
123
124 /* i2c read/write functions. */
125 static int adt746x_write(device_t dev, uint32_t addr, uint8_t reg,
126 uint8_t *buf);
127 static int adt746x_read(device_t dev, uint32_t addr, uint8_t reg,
128 uint8_t *data);
129
130 static device_method_t adt746x_methods[] = {
131 /* Device interface */
132 DEVMETHOD(device_probe, adt746x_probe),
133 DEVMETHOD(device_attach, adt746x_attach),
134 { 0, 0 },
135 };
136
137 static driver_t adt746x_driver = {
138 "adt746x",
139 adt746x_methods,
140 sizeof(struct adt746x_softc)
141 };
142
143 DRIVER_MODULE(adt746x, iicbus, adt746x_driver, 0, 0);
144 static MALLOC_DEFINE(M_ADT746X, "adt746x", "ADT Sensor Information");
145
146
147 /* i2c read/write functions. */
148
149 static int
adt746x_write(device_t dev,uint32_t addr,uint8_t reg,uint8_t * buff)150 adt746x_write(device_t dev, uint32_t addr, uint8_t reg, uint8_t *buff)
151 {
152 uint8_t buf[4];
153 int try = 0;
154
155 struct iic_msg msg[] = {
156 {addr, IIC_M_WR, 2, buf }
157 };
158
159 /* Prepare the write msg. */
160 buf[0] = reg;
161 memcpy(buf + 1, buff, 1);
162
163 for (;;)
164 {
165 if (iicbus_transfer(dev, msg, 1) == 0)
166 return (0);
167 if (++try > 5) {
168 device_printf(dev, "iicbus write failed\n");
169 return (-1);
170 }
171 pause("adt746x_write", hz);
172 }
173 return (0);
174 }
175
176 static int
adt746x_read(device_t dev,uint32_t addr,uint8_t reg,uint8_t * data)177 adt746x_read(device_t dev, uint32_t addr, uint8_t reg, uint8_t *data)
178 {
179 uint8_t buf[4];
180 int err, try = 0;
181
182 struct iic_msg msg[2] = {
183 {addr, IIC_M_WR | IIC_M_NOSTOP, 1, ®},
184 {addr, IIC_M_RD, 1, buf},
185 };
186
187 for (;;)
188 {
189 err = iicbus_transfer(dev, msg, 2);
190 if (err != 0)
191 goto retry;
192
193 *data = *((uint8_t*)buf);
194 return (0);
195 retry:
196 if (++try > 5) {
197 device_printf(dev, "iicbus read failed\n");
198 return (-1);
199 }
200 pause("adt746x_read", hz);
201 }
202 }
203
204 static int
adt746x_probe(device_t dev)205 adt746x_probe(device_t dev)
206 {
207 const char *name, *compatible;
208 struct adt746x_softc *sc;
209
210 name = ofw_bus_get_name(dev);
211 compatible = ofw_bus_get_compat(dev);
212
213 if (!name)
214 return (ENXIO);
215
216 if (strcmp(name, "fan") != 0 ||
217 (strcmp(compatible, "adt7460") != 0 &&
218 strcmp(compatible, "adt7467") != 0))
219 return (ENXIO);
220
221 sc = device_get_softc(dev);
222 sc->sc_dev = dev;
223 sc->sc_addr = iicbus_get_addr(dev);
224
225 device_set_desc(dev, "Apple Thermostat Unit ADT746X");
226
227 return (0);
228 }
229
230 static int
adt746x_attach(device_t dev)231 adt746x_attach(device_t dev)
232 {
233 struct adt746x_softc *sc;
234
235 sc = device_get_softc(dev);
236
237 sc->enum_hook.ich_func = adt746x_start;
238 sc->enum_hook.ich_arg = dev;
239
240 /* We have to wait until interrupts are enabled. I2C read and write
241 * only works if the interrupts are available.
242 * The unin/i2c is controlled by the htpic on unin. But this is not
243 * the master. The openpic on mac-io is controlling the htpic.
244 * This one gets attached after the mac-io probing and then the
245 * interrupts will be available.
246 */
247
248 if (config_intrhook_establish(&sc->enum_hook) != 0)
249 return (ENOMEM);
250
251 return (0);
252 }
253
254 static void
adt746x_start(void * xdev)255 adt746x_start(void *xdev)
256 {
257 uint8_t did, cid, rev, conf;
258
259 struct adt746x_softc *sc;
260
261 device_t dev = (device_t)xdev;
262
263 sc = device_get_softc(dev);
264
265 adt746x_read(sc->sc_dev, sc->sc_addr, ADT746X_DEVICE_ID, &did);
266 adt746x_read(sc->sc_dev, sc->sc_addr, ADT746X_COMPANY_ID, &cid);
267 adt746x_read(sc->sc_dev, sc->sc_addr, ADT746X_REV_ID, &rev);
268 adt746x_read(sc->sc_dev, sc->sc_addr, ADT746X_CONFIG, &conf);
269
270 device_printf(dev, "Dev ID %#x, Company ID %#x, Rev ID %#x CNF: %#x\n",
271 did, cid, rev, conf);
272
273 /* We can get the device id either from 'of' properties or from the chip
274 itself. This method makes sure we can read the chip, otherwise
275 we return. */
276
277 sc->device_id = did;
278
279 conf = 1;
280 /* Start the ADT7460. */
281 if (sc->device_id == ADT7460_DEV_ID)
282 adt746x_write(sc->sc_dev, sc->sc_addr, ADT746X_CONFIG, &conf);
283
284 /* Detect and attach child devices. */
285 adt746x_attach_fans(dev);
286 adt746x_attach_sensors(dev);
287 config_intrhook_disestablish(&sc->enum_hook);
288 }
289
290 /*
291 * Sensor and fan management
292 */
293 static int
adt746x_fan_set_pwm(struct adt746x_fan * fan,int pwm)294 adt746x_fan_set_pwm(struct adt746x_fan *fan, int pwm)
295 {
296 uint8_t reg = 0, manual, mode = 0;
297 struct adt746x_softc *sc;
298 uint8_t buf;
299
300 sc = device_get_softc(fan->dev);
301
302 /* Clamp to allowed range */
303 pwm = max(fan->fan.min_rpm, pwm);
304 pwm = min(fan->fan.max_rpm, pwm);
305
306 reg = fan->pwm_reg;
307 mode = fan->conf_reg;
308
309 /* From the 7460 datasheet:
310 PWM dutycycle can be programmed from 0% (0x00) to 100% (0xFF)
311 in steps of 0.39% (256 steps).
312 */
313 buf = (pwm * 100 / 39) - (pwm ? 1 : 0);
314 fan->setpoint = buf;
315
316 /* Manual mode. */
317 adt746x_read(sc->sc_dev, sc->sc_addr, mode, &manual);
318 manual |= ADT746X_MANUAL_MASK;
319 adt746x_write(sc->sc_dev, sc->sc_addr, mode, &manual);
320
321 /* Write speed. */
322 adt746x_write(sc->sc_dev, sc->sc_addr, reg, &buf);
323
324 return (0);
325 }
326
327 static int
adt746x_fan_get_pwm(struct adt746x_fan * fan)328 adt746x_fan_get_pwm(struct adt746x_fan *fan)
329 {
330 uint8_t buf, reg;
331 uint16_t pwm;
332 struct adt746x_softc *sc;
333
334 sc = device_get_softc(fan->dev);
335
336 reg = fan->pwm_reg;
337
338 adt746x_read(sc->sc_dev, sc->sc_addr, reg, &buf);
339
340 pwm = (buf * 39 / 100) + (buf ? 1 : 0);
341 return (pwm);
342 }
343
344 static int
adt746x_fill_fan_prop(device_t dev)345 adt746x_fill_fan_prop(device_t dev)
346 {
347 phandle_t child;
348 struct adt746x_softc *sc;
349 u_int *id;
350 char *location;
351 int i, id_len, len = 0, location_len, prev_len = 0;
352
353 sc = device_get_softc(dev);
354
355 child = ofw_bus_get_node(dev);
356
357 /* Fill the fan location property. */
358 location_len = OF_getprop_alloc(child, "hwctrl-location", (void **)&location);
359 id_len = OF_getprop_alloc_multi(child, "hwctrl-id", sizeof(cell_t), (void **)&id);
360 if (location_len == -1 || id_len == -1) {
361 OF_prop_free(location);
362 OF_prop_free(id);
363 return 0;
364 }
365
366 /* Fill in all the properties for each fan. */
367 for (i = 0; i < id_len; i++) {
368 strlcpy(sc->sc_fans[i].fan.name, location + len, 32);
369 prev_len = strlen(location + len) + 1;
370 len += prev_len;
371 sc->sc_fans[i].id = id[i];
372 if (id[i] == 6) {
373 sc->sc_fans[i].pwm_reg = ADT746X_PWM1;
374 sc->sc_fans[i].conf_reg = ADT746X_PWM1_CONF;
375 } else if (id[i] == 7) {
376 sc->sc_fans[i].pwm_reg = ADT746X_PWM2;
377 sc->sc_fans[i].conf_reg = ADT746X_PWM2_CONF;
378 } else {
379 sc->sc_fans[i].pwm_reg = ADT746X_PWM1 + i;
380 sc->sc_fans[i].conf_reg = ADT746X_PWM1_CONF + i;
381 }
382 sc->sc_fans[i].dev = sc->sc_dev;
383 sc->sc_fans[i].fan.min_rpm = 5; /* Percent */
384 sc->sc_fans[i].fan.max_rpm = 100;
385 sc->sc_fans[i].fan.read = NULL;
386 sc->sc_fans[i].fan.set =
387 (int (*)(struct pmac_fan *, int))(adt746x_fan_set_pwm);
388 sc->sc_fans[i].fan.default_rpm = sc->sc_fans[i].fan.max_rpm;
389 }
390 OF_prop_free(location);
391 OF_prop_free(id);
392
393 return (i);
394 }
395
396 static int
adt746x_fill_sensor_prop(device_t dev)397 adt746x_fill_sensor_prop(device_t dev)
398 {
399 phandle_t child, node;
400 struct adt746x_softc *sc;
401 char sens_type[32];
402 int i = 0, reg, sensid;
403
404 sc = device_get_softc(dev);
405
406 child = ofw_bus_get_node(dev);
407
408 /* Fill in the sensor properties for each child. */
409 for (node = OF_child(child); node != 0; node = OF_peer(node)) {
410 if (OF_getprop(node, "sensor-id", &sensid, sizeof(sensid)) == -1)
411 continue;
412 OF_getprop(node, "location", sc->sc_sensors[i].therm.name, 32);
413 OF_getprop(node, "device_type", sens_type, sizeof(sens_type));
414 if (strcmp(sens_type, "temperature") == 0)
415 sc->sc_sensors[i].type = ADT746X_SENSOR_TEMP;
416 else if (strcmp(sens_type, "voltage") == 0)
417 sc->sc_sensors[i].type = ADT746X_SENSOR_VOLT;
418 else
419 sc->sc_sensors[i].type = ADT746X_SENSOR_SPEED;
420 OF_getprop(node, "reg", ®, sizeof(reg));
421 OF_getprop(node, "sensor-id", &sensid,
422 sizeof(sensid));
423 /* This is the i2c register of the sensor. */
424 sc->sc_sensors[i].reg = reg;
425 sc->sc_sensors[i].id = sensid;
426 OF_getprop(node, "zone", &sc->sc_sensors[i].therm.zone,
427 sizeof(sc->sc_sensors[i].therm.zone));
428 sc->sc_sensors[i].dev = dev;
429 sc->sc_sensors[i].therm.read =
430 (int (*)(struct pmac_therm *))adt746x_sensor_read;
431 if (sc->sc_sensors[i].type == ADT746X_SENSOR_TEMP) {
432 /* Make up some ranges */
433 sc->sc_sensors[i].therm.target_temp = 500 + ZERO_C_TO_K;
434 sc->sc_sensors[i].therm.max_temp = 800 + ZERO_C_TO_K;
435
436 pmac_thermal_sensor_register(&sc->sc_sensors[i].therm);
437 }
438 i++;
439 }
440
441 return (i);
442 }
443
444 static int
adt746x_fanrpm_sysctl(SYSCTL_HANDLER_ARGS)445 adt746x_fanrpm_sysctl(SYSCTL_HANDLER_ARGS)
446 {
447 device_t adt;
448 struct adt746x_softc *sc;
449 struct adt746x_fan *fan;
450 int pwm = 0, error;
451
452 adt = arg1;
453 sc = device_get_softc(adt);
454 fan = &sc->sc_fans[arg2];
455 pwm = adt746x_fan_get_pwm(fan);
456 error = sysctl_handle_int(oidp, &pwm, 0, req);
457
458 if (error || !req->newptr)
459 return (error);
460
461 return (adt746x_fan_set_pwm(fan, pwm));
462 }
463
464 static void
adt746x_attach_fans(device_t dev)465 adt746x_attach_fans(device_t dev)
466 {
467 struct adt746x_softc *sc;
468 struct sysctl_oid *oid, *fanroot_oid;
469 struct sysctl_ctx_list *ctx;
470 char sysctl_name[32];
471 int i, j;
472
473 sc = device_get_softc(dev);
474
475 sc->sc_nfans = 0;
476
477 /* Count the actual number of fans. */
478 sc->sc_nfans = adt746x_fill_fan_prop(dev);
479
480 device_printf(dev, "%d fans detected!\n", sc->sc_nfans);
481
482 if (sc->sc_nfans == 0) {
483 device_printf(dev, "WARNING: No fans detected!\n");
484 return;
485 }
486
487 ctx = device_get_sysctl_ctx(dev);
488 fanroot_oid = SYSCTL_ADD_NODE(ctx,
489 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, "fans",
490 CTLFLAG_RD | CTLFLAG_MPSAFE, 0, "ADT Fan Information");
491
492 /* Now we can fill the properties into the allocated struct. */
493 sc->sc_nfans = adt746x_fill_fan_prop(dev);
494
495 /* Register fans with pmac_thermal */
496 for (i = 0; i < sc->sc_nfans; i++)
497 pmac_thermal_fan_register(&sc->sc_fans[i].fan);
498
499 /* Add sysctls for the fans. */
500 for (i = 0; i < sc->sc_nfans; i++) {
501 for (j = 0; j < strlen(sc->sc_fans[i].fan.name); j++) {
502 sysctl_name[j] = tolower(sc->sc_fans[i].fan.name[j]);
503 if (isspace(sysctl_name[j]))
504 sysctl_name[j] = '_';
505 }
506 sysctl_name[j] = 0;
507
508 sc->sc_fans[i].setpoint =
509 adt746x_fan_get_pwm(&sc->sc_fans[i]);
510
511 oid = SYSCTL_ADD_NODE(ctx, SYSCTL_CHILDREN(fanroot_oid),
512 OID_AUTO, sysctl_name, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
513 "Fan Information");
514
515 /* I use i to pass the fan id. */
516 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
517 "pwm", CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, dev,
518 i, adt746x_fanrpm_sysctl, "I", "Fan PWM in %");
519 }
520
521 /* Dump fan location & type. */
522 if (bootverbose) {
523 for (i = 0; i < sc->sc_nfans; i++) {
524 device_printf(dev, "Fan location: %s",
525 sc->sc_fans[i].fan.name);
526 device_printf(dev, " id: %d RPM: %d\n",
527 sc->sc_fans[i].id,
528 sc->sc_fans[i].setpoint);
529 }
530 }
531 }
532
533 static int
adt746x_sensor_read(struct adt746x_sensor * sens)534 adt746x_sensor_read(struct adt746x_sensor *sens)
535 {
536 struct adt746x_softc *sc;
537 int tmp = 0;
538 uint16_t val;
539 uint8_t data[1], data1[1];
540 int8_t temp;
541
542 sc = device_get_softc(sens->dev);
543 if (sens->type != ADT746X_SENSOR_SPEED) {
544 if (adt746x_read(sc->sc_dev, sc->sc_addr, sens->reg,
545 &temp) < 0)
546 return (-1);
547 if (sens->type == ADT746X_SENSOR_TEMP)
548 tmp = 10 * temp + ZERO_C_TO_K;
549 else
550 tmp = temp;
551 } else {
552 if (adt746x_read(sc->sc_dev, sc->sc_addr, sens->reg,
553 data) < 0)
554 return (-1);
555 if (adt746x_read(sc->sc_dev, sc->sc_addr, sens->reg + 1,
556 data1) < 0)
557 return (-1);
558 val = data[0] + (data1[0] << 8);
559 /* A value of 0xffff means the fan is stopped. */
560 if (val == 0 || val == 0xffff)
561 tmp = 0;
562 else
563 tmp = (90000 * 60) / val;
564 }
565 return (tmp);
566 }
567
568 static int
adt746x_sensor_sysctl(SYSCTL_HANDLER_ARGS)569 adt746x_sensor_sysctl(SYSCTL_HANDLER_ARGS)
570 {
571 device_t dev;
572 struct adt746x_softc *sc;
573 struct adt746x_sensor *sens;
574 int value, error;
575
576 dev = arg1;
577 sc = device_get_softc(dev);
578 sens = &sc->sc_sensors[arg2];
579
580 value = sens->therm.read(&sens->therm);
581 if (value < 0)
582 return (ENXIO);
583
584 error = sysctl_handle_int(oidp, &value, 0, req);
585
586 return (error);
587 }
588
589 static void
adt746x_attach_sensors(device_t dev)590 adt746x_attach_sensors(device_t dev)
591 {
592 struct adt746x_softc *sc;
593 struct sysctl_oid *oid, *sensroot_oid;
594 struct sysctl_ctx_list *ctx;
595 char sysctl_name[40];
596 const char *unit;
597 const char *desc;
598 int i, j;
599
600
601 sc = device_get_softc(dev);
602 sc->sc_nsensors = 0;
603
604 /* Count the actual number of sensors. */
605 sc->sc_nsensors = adt746x_fill_sensor_prop(dev);
606 device_printf(dev, "%d sensors detected!\n", sc->sc_nsensors);
607 if (sc->sc_nsensors == 0) {
608 device_printf(dev, "WARNING: No sensors detected!\n");
609 return;
610 }
611
612 ctx = device_get_sysctl_ctx(dev);
613 sensroot_oid = SYSCTL_ADD_NODE(ctx,
614 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, "sensors",
615 CTLFLAG_RD | CTLFLAG_MPSAFE, 0, "ADT Sensor Information");
616
617 /* Add the sysctl for the sensors. */
618 for (i = 0; i < sc->sc_nsensors; i++) {
619 for (j = 0; j < strlen(sc->sc_sensors[i].therm.name); j++) {
620 sysctl_name[j] = tolower(sc->sc_sensors[i].therm.name[j]);
621 if (isspace(sysctl_name[j]))
622 sysctl_name[j] = '_';
623 }
624 sysctl_name[j] = 0;
625 oid = SYSCTL_ADD_NODE(ctx, SYSCTL_CHILDREN(sensroot_oid),
626 OID_AUTO, sysctl_name, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
627 "Sensor Information");
628 if (sc->sc_sensors[i].type == ADT746X_SENSOR_TEMP) {
629 unit = "temp";
630 desc = "sensor unit (C)";
631 } else if (sc->sc_sensors[i].type == ADT746X_SENSOR_VOLT) {
632 unit = "volt";
633 desc = "sensor unit (mV)";
634 } else {
635 unit = "rpm";
636 desc = "sensor unit (RPM)";
637 }
638 /* I use i to pass the sensor id. */
639 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
640 unit, CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_NEEDGIANT, dev, i,
641 adt746x_sensor_sysctl,
642 sc->sc_sensors[i].type == ADT746X_SENSOR_TEMP ?
643 "IK" : "I", desc);
644 }
645
646 /* Dump sensor location & type. */
647 if (bootverbose) {
648 for (i = 0; i < sc->sc_nsensors; i++) {
649 device_printf(dev, "Sensor location: %s",
650 sc->sc_sensors[i].therm.name);
651 device_printf(dev, " type: %d id: %d reg: 0x%x\n",
652 sc->sc_sensors[i].type,
653 sc->sc_sensors[i].id,
654 sc->sc_sensors[i].reg);
655 }
656 }
657 }
658