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[109.252.192.57]) by smtp.gmail.com with ESMTPSA id q5sm996921lfr.172.2021.01.22.12.25.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 22 Jan 2021 12:25:08 -0800 (PST) From: Dmitry Osipenko To: Thierry Reding , Jonathan Hunter , Daniel Lezcano , Nicolas Chauvet , Matt Merhar , Peter Geis Cc: linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 02/13] ARM: tegra: ventana: Support CPU thermal throttling Date: Fri, 22 Jan 2021 23:24:46 +0300 Message-Id: <20210122202457.13326-3-digetx@gmail.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210122202457.13326-1-digetx@gmail.com> References: <20210122202457.13326-1-digetx@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Enable CPU thermal throttling on Tegra20 Ventana board. Signed-off-by: Dmitry Osipenko --- arch/arm/boot/dts/tegra20-ventana.dts | 41 +++++++++++++++++++++++++-- 1 file changed, 39 insertions(+), 2 deletions(-) diff --git a/arch/arm/boot/dts/tegra20-ventana.dts b/arch/arm/boot/dts/tegra20-ventana.dts index 02b94ed722d0..99a356c1ccec 100644 --- a/arch/arm/boot/dts/tegra20-ventana.dts +++ b/arch/arm/boot/dts/tegra20-ventana.dts @@ -2,6 +2,7 @@ /dts-v1/; #include +#include #include "tegra20.dtsi" #include "tegra20-cpu-opp.dtsi" #include "tegra20-cpu-opp-microvolt.dtsi" @@ -528,9 +529,10 @@ ldo_rtc { }; }; - temperature-sensor@4c { + nct1008: temperature-sensor@4c { compatible = "onnn,nct1008"; reg = <0x4c>; + #thermal-sensor-cells = <1>; }; }; @@ -614,11 +616,13 @@ cpus { cpu0: cpu@0 { cpu-supply = <&vdd_cpu>; operating-points-v2 = <&cpu0_opp_table>; + #cooling-cells = <2>; }; - cpu@1 { + cpu1: cpu@1 { cpu-supply = <&vdd_cpu>; operating-points-v2 = <&cpu0_opp_table>; + #cooling-cells = <2>; }; }; @@ -716,4 +720,37 @@ sound { <&tegra_car TEGRA20_CLK_CDEV1>; clock-names = "pll_a", "pll_a_out0", "mclk"; }; + + thermal-zones { + cpu-thermal { + polling-delay-passive = <1000>; /* milliseconds */ + polling-delay = <5000>; /* milliseconds */ + + thermal-sensors = <&nct1008 1>; + + trips { + trip0: cpu-alert0 { + /* start throttling at 50C */ + temperature = <50000>; + hysteresis = <200>; + type = "passive"; + }; + + trip1: cpu-crit { + /* shut down at 60C */ + temperature = <60000>; + 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>; + }; + }; + }; + }; }; -- 2.29.2