From: Wei Ni <wni@nvidia.com>
To: <thierry.reding@gmail.com>, <daniel.lezcano@linaro.org>,
<linux-tegra@vger.kernel.org>
Cc: <rui.zhang@intel.com>, <edubezval@gmail.com>,
<linux-kernel@vger.kernel.org>, Wei Ni <wni@nvidia.com>
Subject: [PATCH] thermal: tegra: add get_trend ops
Date: Tue, 20 Nov 2018 17:11:17 +0800 [thread overview]
Message-ID: <1542705077-29697-1-git-send-email-wni@nvidia.com> (raw)
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 ed28110a3535..d2951fbe2b7c 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
next reply other threads:[~2018-11-20 9:11 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-20 9:11 Wei Ni [this message]
2018-11-20 15:38 ` [PATCH] thermal: tegra: add get_trend ops Thierry Reding
2018-11-21 6:36 ` Wei Ni
2018-11-28 9:41 ` Wei Ni
2018-11-29 17:01 ` Eduardo Valentin
2018-11-30 3:07 ` Wei Ni
2018-12-05 8:30 ` Wei Ni
2018-12-11 6:20 ` Wei Ni
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