forked from luck/tmp_suning_uos_patched
ACPI: thermal: create "thermal.psv=" to override passive trip points
"thermal.psv=-1" disables passive trip points for all ACPI thermal zones. "thermal.psv=C", where 'C' is degrees Celsius, overrides all existing passive trip points for all ACPI thermal zones. thermal.psv is checked at module load time, and in response to trip-point change events. Note that if the system does not deliver thermal zone temperature change events near the new trip-point, then it will not be noticed. To force your custom trip point to be noticed, you may need to enable polling: eg. thermal.tzp=3000 invokes polling every 5 minutes. Note that once passive thermal throttling is invoked, it has its own internal Thermal Sampling Period (_TSP), that is unrelated to _TZP. WARNING: disabling or raising a thermal trip point may result in increased running temperature and shorter hardware lifetime on some systems. Signed-off-by: Len Brown <len.brown@intel.com>
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@ -1823,6 +1823,10 @@ and is between 256 and 4096 characters. It is defined in the file
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thermal.off= [HW,ACPI]
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1: disable ACPI thermal control
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thermal.psv= [HW,ACPI]
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-1: disable all passive trip points
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<degrees C>: override all passive trip points to this value
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thermal.tzp= [HW,ACPI]
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Specify global default ACPI thermal zone polling rate
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<deci-seconds>: poll all this frequency
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@ -82,6 +82,10 @@ static int off;
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module_param(off, int, 0);
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MODULE_PARM_DESC(off, "Set to disable ACPI thermal support.\n");
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static int psv;
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module_param(psv, int, 0644);
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MODULE_PARM_DESC(psv, "Disable or override all passive trip points.\n");
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static int acpi_thermal_add(struct acpi_device *device);
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static int acpi_thermal_remove(struct acpi_device *device, int type);
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static int acpi_thermal_resume(struct acpi_device *device);
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@ -343,9 +347,16 @@ static int acpi_thermal_get_trip_points(struct acpi_thermal *tz)
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/* Passive: Processors (optional) */
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status =
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acpi_evaluate_integer(tz->device->handle, "_PSV", NULL,
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&tz->trips.passive.temperature);
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if (psv == -1) {
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status = AE_SUPPORT;
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} else if (psv > 0) {
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tz->trips.passive.temperature = CELSIUS_TO_KELVIN(psv);
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status = AE_OK;
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} else {
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status = acpi_evaluate_integer(tz->device->handle,
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"_PSV", NULL, &tz->trips.passive.temperature);
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}
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if (ACPI_FAILURE(status)) {
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tz->trips.passive.flags.valid = 0;
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No passive threshold\n"));
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