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thermal: bang-bang governor: act on lower trip boundary

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With interrupt driven thermal zones we pass the lower and upper
temperature on which shall be acted, so in the governor we have to act on
the exact lower temperature to be consistent. Otherwise an interrupt maybe
generated on the exact lower temperature, but the bang bang governor does
not react since The polling driven zones have to be one step cooler before
the governor reacts.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Caesar Wang <wxt@rock-chips.com>
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Eduardo Valentin <edubezval@gmail.com>
Cc: linux-pm@vger.kernel.org
Acked-by: Peter Feuerer <peter@piie.net>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
This commit is contained in:
Sascha Hauer 2016-06-22 16:42:04 +08:00 committed by Zhang Rui
parent e78eaf4599
commit 897e721037
1 changed files with 1 additions and 1 deletions
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2
drivers/thermal/gov_bang_bang.c
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@ -65,7 +65,7 @@ static void thermal_zone_trip_update(struct thermal_zone_device *tz, int trip)
if (instance->target == 0 && tz->temperature >= trip_temp) if (instance->target == 0 && tz->temperature >= trip_temp)
instance->target = 1; instance->target = 1;
else if (instance->target == 1 && else if (instance->target == 1 &&
tz->temperature < trip_temp - trip_hyst) tz->temperature <= trip_temp - trip_hyst)
instance->target = 0; instance->target = 0;
dev_dbg(&instance->cdev->device, "target=%d\n", dev_dbg(&instance->cdev->device, "target=%d\n",