[PATCH v7 3/3] thermal: tegra: add get_trend ops

Wei Ni
2019-01-03T10:13:27Z

Add support for get_trend ops that allows soctherm
sensors to be used with the step-wise governor.

Signed-off-by: Wei Ni <wni@nvidia.com>
---
drivers/thermal/tegra/soctherm.c | 34 ++++++++++++++++++++++++++++++++++
1 file changed, 34 insertions(+)

diff --git a/drivers/thermal/tegra/soctherm.c b/drivers/thermal/tegra/soctherm.c
index fd2703c0cfc5..864205af104b 100644
--- a/drivers/thermal/tegra/soctherm.c
+++ b/drivers/thermal/tegra/soctherm.c
@@ -488,9 +488,43 @@ static int tegra_thermctl_set_trip_temp(void *data, int trip, int temp)
return 0;
}

+static int tegra_thermctl_get_trend(void *data, int trip,
+ enum thermal_trend *trend)
+{
+ struct tegra_thermctl_zone *zone = data;
+ struct thermal_zone_device *tz = zone->tz;
+ int trip_temp, temp, last_temp, ret;
+
+ if (!tz)
+ return -EINVAL;
+
+ ret = tz->ops->get_trip_temp(zone->tz, trip, &trip_temp);
+ if (ret)
+ return ret;
+
+ mutex_lock(&tz->lock);
+ temp = tz->temperature;
+ last_temp = tz->last_temperature;
+ mutex_unlock(&tz->lock);
+
+ if (temp > trip_temp) {
+ if (temp >= last_temp)
+ *trend = THERMAL_TREND_RAISING;
+ else
+ *trend = THERMAL_TREND_STABLE;
+ } else if (temp < trip_temp) {
+ *trend = THERMAL_TREND_DROPPING;
+ } else {
+ *trend = THERMAL_TREND_STABLE;
+ }
+
+ return 0;
+}
+
static const struct thermal_zone_of_device_ops tegra_of_thermal_ops = {
.get_temp = tegra_thermctl_get_temp,
.set_trip_temp = tegra_thermctl_set_trip_temp,
+ .get_trend = tegra_thermctl_get_trend,
};

static int get_hot_temp(struct thermal_zone_device *tz, int *trip, int *temp)
--
2.7.4