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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


             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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