PM / devfreq: tegra30: Support thermal cooling

Expose ACTMON devfreq device as a cooling device in order to throttle
memory freq on overheat. Throttling of memory freq has a significant
cooling effect on NVIDIA Tegra SoCs since higher memory freqs require
higher SoC core voltage which is one of the main causes of the heating.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>

diff --git a/drivers/devfreq/tegra30-devfreq.c b/drivers/devfreq/tegra30-devfreq.c
index ce83f88..10661eb 100644 (file)
--- a/drivers/devfreq/tegra30-devfreq.c
+++ b/drivers/devfreq/tegra30-devfreq.c
@@ -688,6 +688,7 @@ static struct devfreq_dev_profile tegra_devfreq_profile = {
        .polling_ms     = ACTMON_SAMPLING_PERIOD,
        .target         = tegra_devfreq_target,
        .get_dev_status = tegra_devfreq_get_dev_status,
+       .is_cooling_device = true,
 };
 
 static int tegra_governor_get_target(struct devfreq *devfreq,