diff options
Diffstat (limited to 'sys/dev/acpica/acpi_thermal.c')
| -rw-r--r-- | sys/dev/acpica/acpi_thermal.c | 35 |
1 files changed, 21 insertions, 14 deletions
diff --git a/sys/dev/acpica/acpi_thermal.c b/sys/dev/acpica/acpi_thermal.c index 7efec65..32fb551 100644 --- a/sys/dev/acpica/acpi_thermal.c +++ b/sys/dev/acpica/acpi_thermal.c @@ -53,8 +53,11 @@ ACPI_MODULE_NAME("THERMAL") #define TZ_NOTIFY_LEVELS 0x81 #define TZ_NOTIFY_DEVICES 0x82 -/* Check for temperature changes every 30 seconds by default */ -#define TZ_POLLRATE 30 +/* Check for temperature changes every 10 seconds by default */ +#define TZ_POLLRATE 10 + +/* Make sure the reported temperature is valid for this number of polls. */ +#define TZ_VALIDCHECKS 3 /* ACPI spec defines this */ #define TZ_NUMLEVELS 10 @@ -71,7 +74,6 @@ struct acpi_tz_zone { int tzp; }; - struct acpi_tz_softc { device_t tz_dev; ACPI_HANDLE tz_handle; /*Thermal zone handle*/ @@ -95,6 +97,7 @@ struct acpi_tz_softc { struct acpi_tz_zone tz_zone; /*Thermal zone parameters*/ int tz_tmp_updating; + int tz_validchecks; }; static int acpi_tz_probe(device_t dev); @@ -472,18 +475,22 @@ acpi_tz_monitor(void *Context) /* XXX (de)activate any passive cooling that may be required. */ /* - * If we have just become _HOT or _CRT, warn the user. - * - * We should actually shut down at this point, but it's not clear - * that some systems don't actually map _CRT to the same value as _AC0. + * If the temperature is at _HOT or _CRT, increment our event count. + * If it has occurred enough times, shutdown the system. This is + * needed because some systems will report an invalid high temperature + * for one poll cycle. It is suspected this is due to the embedded + * controller timing out. A typical value is 138C for one cycle on + * a system that is otherwise 65C. */ - if ((newflags & (TZ_THFLAG_HOT | TZ_THFLAG_CRT)) != 0 && - (sc->tz_thflags & (TZ_THFLAG_HOT | TZ_THFLAG_CRT)) == 0) { - - device_printf(sc->tz_dev, - "WARNING - current temperature (%d.%dC) exceeds system limits\n", - TZ_KELVTOC(sc->tz_temperature)); - shutdown_nice(RB_POWEROFF); + if ((newflags & (TZ_THFLAG_HOT | TZ_THFLAG_CRT)) != 0) { + if (++sc->tz_validchecks == TZ_VALIDCHECKS) { + device_printf(sc->tz_dev, + "WARNING - current temperature (%d.%dC) exceeds safe limits\n", + TZ_KELVTOC(sc->tz_temperature)); + shutdown_nice(RB_POWEROFF); + } + } else { + sc->tz_validchecks = 0; } sc->tz_thflags = newflags; |
