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Message-Id: <20210616190417.32214-7-digetx@gmail.com>
Date: Wed, 16 Jun 2021 22:04:17 +0300
From: Dmitry Osipenko <digetx@...il.com>
To: Thierry Reding <thierry.reding@...il.com>,
Jonathan Hunter <jonathanh@...dia.com>,
Zhang Rui <rui.zhang@...el.com>,
Daniel Lezcano <daniel.lezcano@...aro.org>,
Amit Kucheria <amitk@...nel.org>,
Andreas Westman Dorcsak <hedmoo@...oo.com>,
Maxim Schwalm <maxim.schwalm@...il.com>,
Svyatoslav Ryhel <clamor95@...il.com>,
Ihor Didenko <tailormoon@...bler.ru>,
Ion Agorria <ion@...rria.com>,
Matt Merhar <mattmerhar@...tonmail.com>,
Peter Geis <pgwipeout@...il.com>
Cc: linux-pm@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-tegra@...r.kernel.org
Subject: [PATCH v4 6/6] ARM: tegra: Add SoC thermal sensor to Tegra30 device-trees
Add the on-chip SoC thermal sensor to Tegra30 device-trees. Now CPU
temperature reporting and thermal throttling is available on all Tegra30
devices universally.
Signed-off-by: Dmitry Osipenko <digetx@...il.com>
---
arch/arm/boot/dts/tegra30.dtsi | 87 ++++++++++++++++++++++++++++++++--
1 file changed, 83 insertions(+), 4 deletions(-)
diff --git a/arch/arm/boot/dts/tegra30.dtsi b/arch/arm/boot/dts/tegra30.dtsi
index c577c191be4b..404b6ecc9c20 100644
--- a/arch/arm/boot/dts/tegra30.dtsi
+++ b/arch/arm/boot/dts/tegra30.dtsi
@@ -5,6 +5,7 @@
#include <dt-bindings/pinctrl/pinctrl-tegra.h>
#include <dt-bindings/interrupt-controller/arm-gic.h>
#include <dt-bindings/soc/tegra-pmc.h>
+#include <dt-bindings/thermal/thermal.h>
#include "tegra30-peripherals-opp.dtsi"
@@ -800,6 +801,20 @@ fuse@...0f800 {
reset-names = "fuse";
};
+ tsensor: tsensor@...14000 {
+ compatible = "nvidia,tegra30-tsensor";
+ reg = <0x70014000 0x500>;
+ interrupts = <GIC_SPI 102 IRQ_TYPE_LEVEL_HIGH>;
+ clocks = <&tegra_car TEGRA30_CLK_TSENSOR>;
+ resets = <&tegra_car TEGRA30_CLK_TSENSOR>;
+
+ assigned-clocks = <&tegra_car TEGRA30_CLK_TSENSOR>;
+ assigned-clock-parents = <&tegra_car TEGRA30_CLK_CLK_M>;
+ assigned-clock-rates = <500000>;
+
+ #thermal-sensor-cells = <1>;
+ };
+
hda@...30000 {
compatible = "nvidia,tegra30-hda";
reg = <0x70030000 0x10000>;
@@ -1062,32 +1077,36 @@ cpus {
#address-cells = <1>;
#size-cells = <0>;
- cpu@0 {
+ cpu0: cpu@0 {
device_type = "cpu";
compatible = "arm,cortex-a9";
reg = <0>;
clocks = <&tegra_car TEGRA30_CLK_CCLK_G>;
+ #cooling-cells = <2>;
};
- cpu@1 {
+ cpu1: cpu@1 {
device_type = "cpu";
compatible = "arm,cortex-a9";
reg = <1>;
clocks = <&tegra_car TEGRA30_CLK_CCLK_G>;
+ #cooling-cells = <2>;
};
- cpu@2 {
+ cpu2: cpu@2 {
device_type = "cpu";
compatible = "arm,cortex-a9";
reg = <2>;
clocks = <&tegra_car TEGRA30_CLK_CCLK_G>;
+ #cooling-cells = <2>;
};
- cpu@3 {
+ cpu3: cpu@3 {
device_type = "cpu";
compatible = "arm,cortex-a9";
reg = <3>;
clocks = <&tegra_car TEGRA30_CLK_CCLK_G>;
+ #cooling-cells = <2>;
};
};
@@ -1102,4 +1121,64 @@ pmu {
<&{/cpus/cpu@2}>,
<&{/cpus/cpu@3}>;
};
+
+ thermal-zones {
+ tsensor-channel0 {
+ polling-delay-passive = <1000>; /* milliseconds */
+ polling-delay = <5000>; /* milliseconds */
+
+ thermal-sensors = <&tsensor 0>;
+
+ trips {
+ level1_trip: dvfs-alert {
+ /* throttle at 80C until temperature drops to 79.8C */
+ temperature = <80000>;
+ hysteresis = <200>;
+ type = "passive";
+ };
+
+ level2_trip: cpu-div2-throttle {
+ /* hardware CPU x2 freq throttle at 85C */
+ temperature = <85000>;
+ hysteresis = <200>;
+ type = "hot";
+ };
+
+ level3_trip: soc-critical {
+ /* hardware shut down at 90C */
+ temperature = <90000>;
+ hysteresis = <2000>;
+ type = "critical";
+ };
+ };
+
+ cooling-maps {
+ map0 {
+ trip = <&level1_trip>;
+ cooling-device = <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+ <&cpu1 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+ <&cpu2 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+ <&cpu3 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+ <&actmon THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+ };
+ };
+ };
+
+ tsensor-channel1 {
+ status = "disabled";
+
+ polling-delay-passive = <1000>; /* milliseconds */
+ polling-delay = <0>; /* milliseconds */
+
+ thermal-sensors = <&tsensor 1>;
+
+ trips {
+ dvfs-alert {
+ temperature = <80000>;
+ hysteresis = <200>;
+ type = "passive";
+ };
+ };
+ };
+ };
};
--
2.30.2
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