From: Dmitry Osipenko <digetx@gmail.com>
To: Thierry Reding <thierry.reding@gmail.com>,
Jonathan Hunter <jonathanh@nvidia.com>,
Agneli <poczt@protonmail.ch>, Paul Fertser <fercerpav@gmail.com>,
Svyatoslav Ryhel <clamor95@gmail.com>
Cc: linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH v1 06/10] ARM: tegra: paz00: Add CPU thermal zone
Date: Mon, 10 May 2021 23:25:56 +0300 [thread overview]
Message-ID: <20210510202600.12156-7-digetx@gmail.com> (raw)
In-Reply-To: <20210510202600.12156-1-digetx@gmail.com>
Add thermal zone with a passive cooling trip for CPU. Attach it to the
LM90 sensor which monitors CPU temperature. Now CPU frequencies will be
throttled once trip point is reached, preventing critical overheat.
Tested-by: Agneli <poczt@protonmail.ch>
Tested-by: Paul Fertser <fercerpav@gmail.com>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
arch/arm/boot/dts/tegra20-paz00.dts | 42 +++++++++++++++++++++++++++--
1 file changed, 40 insertions(+), 2 deletions(-)
diff --git a/arch/arm/boot/dts/tegra20-paz00.dts b/arch/arm/boot/dts/tegra20-paz00.dts
index 63d62418d4b8..3180bff90756 100644
--- a/arch/arm/boot/dts/tegra20-paz00.dts
+++ b/arch/arm/boot/dts/tegra20-paz00.dts
@@ -2,6 +2,8 @@
/dts-v1/;
#include <dt-bindings/input/input.h>
+#include <dt-bindings/thermal/thermal.h>
+
#include "tegra20.dtsi"
#include "tegra20-cpu-opp.dtsi"
#include "tegra20-cpu-opp-microvolt.dtsi"
@@ -498,9 +500,10 @@ ldo_rtc {
};
};
- adt7461@4c {
+ adt7461: temperature-sensor@4c {
compatible = "adi,adt7461";
reg = <0x4c>;
+ #thermal-sensor-cells = <1>;
};
};
@@ -655,11 +658,46 @@ cpus {
cpu0: cpu@0 {
cpu-supply = <&cpu_vdd_reg>;
operating-points-v2 = <&cpu0_opp_table>;
+ #cooling-cells = <2>;
};
- cpu@1 {
+ cpu1: cpu@1 {
cpu-supply = <&cpu_vdd_reg>;
operating-points-v2 = <&cpu0_opp_table>;
+ #cooling-cells = <2>;
+ };
+ };
+
+ thermal-zones {
+ cpu-thermal {
+ polling-delay-passive = <500>; /* milliseconds */
+ polling-delay = <1500>; /* milliseconds */
+
+ thermal-sensors = <&adt7461 1>;
+
+ trips {
+ trip0: cpu-alert0 {
+ /* start throttling at 80C */
+ temperature = <80000>;
+ hysteresis = <200>;
+ type = "passive";
+ };
+
+ trip1: cpu-crit {
+ /* shut down at 85C */
+ temperature = <85000>;
+ hysteresis = <2000>;
+ type = "critical";
+ };
+ };
+
+ cooling-maps {
+ map0 {
+ trip = <&trip0>;
+ cooling-device = <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+ <&cpu1 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+ };
+ };
};
};
};
--
2.30.2
next prev parent reply other threads:[~2021-05-10 20:28 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-10 20:25 [PATCH v1 00/10] NVIDIA Tegra ARM32 device-tree improvements for 5.14 Dmitry Osipenko
2021-05-10 20:25 ` [PATCH v1 01/10] ARM: tegra: acer-a500: Improve microphone detection Dmitry Osipenko
2021-05-10 20:25 ` [PATCH v1 02/10] ARM: tegra: acer-a500: Specify proper voltage for WiFi SDIO bus Dmitry Osipenko
2021-05-10 20:25 ` [PATCH v1 03/10] ARM: tegra: acer-a500: Bump thermal trips by 10C Dmitry Osipenko
2021-05-14 21:16 ` Michał Mirosław
2021-05-14 22:17 ` Dmitry Osipenko
2021-06-11 9:52 ` Daniel Lezcano
2021-06-12 10:40 ` Dmitry Osipenko
2021-06-12 14:24 ` Daniel Lezcano
2021-06-13 0:25 ` Dmitry Osipenko
2021-06-13 18:19 ` Daniel Lezcano
2021-06-15 12:53 ` Dmitry Osipenko
2021-06-15 13:05 ` Daniel Lezcano
2021-06-15 13:26 ` Dmitry Osipenko
2021-05-10 20:25 ` [PATCH v1 04/10] ARM: tegra: Add reg property to Tegra20 EMC table device-tree nodes Dmitry Osipenko
2021-05-31 9:14 ` Thierry Reding
2021-05-31 20:45 ` Dmitry Osipenko
2021-06-01 11:25 ` Thierry Reding
2021-06-01 17:44 ` Dmitry Osipenko
2021-06-01 17:54 ` Dmitry Osipenko
2021-05-10 20:25 ` [PATCH v1 05/10] ARM: tegra: wm8903: Fix polarity of headphones-detection GPIO in device-trees Dmitry Osipenko
2021-05-10 20:25 ` Dmitry Osipenko [this message]
2021-05-10 20:25 ` [PATCH v1 07/10] ARM: tegra: nexus7: Add i2c-thermtrip node Dmitry Osipenko
2021-05-10 20:25 ` [PATCH v1 08/10] ARM: tegra: nexus7: Improve thermal zones Dmitry Osipenko
2021-05-10 20:25 ` [PATCH v1 09/10] ARM: tegra: nexus7: Remove monitored-battery property Dmitry Osipenko
2021-05-10 20:26 ` [PATCH v1 10/10] ARM: tegra: nexus7: Correct 3v3 regulator GPIO of PM269 variant Dmitry Osipenko
2021-05-31 8:58 ` [PATCH v1 00/10] NVIDIA Tegra ARM32 device-tree improvements for 5.14 Thierry Reding
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