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Commit 0dac0c13 authored by Ram Chandrasekar's avatar Ram Chandrasekar
Browse files

drivers: thermal: Add low limits cap mitigation governor 



The existing low limits floor mitigation governor can monitor
sensor reading going below a threshold and apply a floor mitigation.
But there are sensors like battery voltage and battery state of charge
that requires the low limits governor to place a frequency cap on CPU/GPU
cooling device, if the batter voltage or charge goes below a threshold.

Update the low limits governor to register a new governor
low_limits_cap, that will place a cap mitigation on a cooling device
when the sensor reading goes below a threshold.

Change-Id: I461b21d8978b2803c8cc489b207d06967af63e6c
Signed-off-by: default avatarRam Chandrasekar <rkumbako@codeaurora.org>
parent 6d44a344

Documentation/devicetree/bindings/thermal/thermal.txt

+2 −0
Original line number Diff line number Diff line
@@ -176,6 +176,8 @@ Optional property: 
			"power_allocator": Use power allocator governor.

			"low_limits_floor": Use low limits floor

						mitigation governor.

			"low_limits_cap": Use a low limits cap mitigation

						governor.

  Type: string



- sustainable-power:	An estimate of the sustainable power (in mW) that the

drivers/thermal/gov_low_limits.c

+7 −0
Original line number Diff line number Diff line
@@ -112,12 +112,19 @@ static struct thermal_governor thermal_gov_low_limits_floor = { 
	.min_state_throttle = 1,

};



static struct thermal_governor thermal_gov_low_limits_cap = {

	.name		= "low_limits_cap",

	.throttle	= low_limits_throttle,

};



int thermal_gov_low_limits_register(void)

{

	thermal_register_governor(&thermal_gov_low_limits_cap);

	return thermal_register_governor(&thermal_gov_low_limits_floor);

}



void thermal_gov_low_limits_unregister(void)

{

	thermal_unregister_governor(&thermal_gov_low_limits_cap);

	thermal_unregister_governor(&thermal_gov_low_limits_floor);

}