/*
* If no AC line devices detected after boot, create an "online" event
* so that userland code can adjust power settings accordingly. The default
* power profile is "performance" so we don't need to repeat that here.
*/
static void
acpi_acad_ac_only(void __unused *arg)
{
if (devclass_get_count(acpi_acad_devclass) == 0)
acpi_UserNotify("ACAD", ACPI_ROOT_OBJECT, 1);
}
/*
* Thermal zone monitor thread.
*/
static void
acpi_tz_thread(void *arg)
{
device_t *devs;
int devcount, i;
int flags;
struct acpi_tz_softc **sc;
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
devs = NULL;
devcount = 0;
sc = NULL;
for (;;) {
/* If the number of devices has changed, re-evaluate. */
if (devclass_get_count(acpi_tz_devclass) != devcount) {
if (devs != NULL) {
free(devs, M_TEMP);
free(sc, M_TEMP);
}
devclass_get_devices(acpi_tz_devclass, &devs, &devcount);
sc = malloc(sizeof(struct acpi_tz_softc *) * devcount, M_TEMP,
M_WAITOK | M_ZERO);
for (i = 0; i < devcount; i++)
sc[i] = device_get_softc(devs[i]);
}
/* Check for temperature events and act on them. */
for (i = 0; i < devcount; i++) {
ACPI_LOCK(thermal);
flags = sc[i]->tz_flags;
sc[i]->tz_flags &= TZ_FLAG_NO_SCP;
ACPI_UNLOCK(thermal);
acpi_tz_timeout(sc[i], flags);
}
/* If more work to do, don't go to sleep yet. */
ACPI_LOCK(thermal);
for (i = 0; i < devcount; i++) {
if (sc[i]->tz_flags & ~TZ_FLAG_NO_SCP)
break;
}
/*
* If we have no more work, sleep for a while, setting PDROP so that
* the mutex will not be reacquired. Otherwise, drop the mutex and
* loop to handle more events.
*/
if (i == devcount)
msleep(&acpi_tz_proc, &thermal_mutex, PZERO | PDROP, "tzpoll",
hz * acpi_tz_polling_rate);
else
ACPI_UNLOCK(thermal);
}
}
int
acpi_battery_get_units(void)
{
devclass_t batt_dc;
batt_dc = devclass_find("battery");
if (batt_dc == NULL)
return (0);
return (devclass_get_count(batt_dc));
}
