linux-kernel - [PATCH v1 08/10] ARM: tegra: nexus7: Improve thermal zones

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Date:   Mon, 10 May 2021 23:25:58 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Agneli <poczt@...tonmail.ch>, Paul Fertser <fercerpav@...il.com>,
        Svyatoslav Ryhel <clamor95@...il.com>
Cc:     linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v1 08/10] ARM: tegra: nexus7: Improve thermal zones

Remove unused thermal zone just to clean up device-tree and set critical
temperature further apart from the passive cooling trip point since
during or thermal testing of Asus Transformer devices we found that CPU
could reach the critical temperature in a certain kernel configurations
for a brief moment if critical trip point is set close to the passive
trip point and then device will be immediately shut off without getting
a chance to cool down using passive cooling.

Signed-off-by: Dmitry Osipenko <digetx@...il.com>
---
 .../boot/dts/tegra30-asus-nexus7-grouper-common.dtsi  | 11 ++---------
 1 file changed, 2 insertions(+), 9 deletions(-)

diff --git a/arch/arm/boot/dts/tegra30-asus-nexus7-grouper-common.dtsi b/arch/arm/boot/dts/tegra30-asus-nexus7-grouper-common.dtsi
index dc773b1bf8ee..3376d06facbb 100644
--- a/arch/arm/boot/dts/tegra30-asus-nexus7-grouper-common.dtsi
+++ b/arch/arm/boot/dts/tegra30-asus-nexus7-grouper-common.dtsi
@@ -1252,13 +1252,6 @@ sound {
 	};
 
 	thermal-zones {
-		skin-thermal {
-			polling-delay-passive = <1000>; /* milliseconds */
-			polling-delay = <0>; /* milliseconds */
-
-			thermal-sensors = <&nct72 0>;
-		};
-
 		cpu-thermal {
 			polling-delay-passive = <1000>; /* milliseconds */
 			polling-delay = <5000>; /* milliseconds */
@@ -1274,8 +1267,8 @@ trip0: cpu-alert0 {
 				};
 
 				trip1: cpu-crit {
-					/* shut down at 60C */
-					temperature = <60000>;
+					/* shut down at 65C */
+					temperature = <65000>;
 					hysteresis = <2000>;
 					type = "critical";
 				};
-- 
2.30.2