Create a new exynosautov920-tmu.dtsi describing new TMU hardware
and include it from exynosautov920.dtsi.
The exynosautov920-tmu node uses the misc clock as its source.
This TMU binding defines multiple thermal zones with a critical trip point
at 125 degrees:
tmu_top : cpus0-0, cpus0-1, cpus0-2, cpus0-3,
cpus1-0, cpus1-1, cpus1-2, cpus1-3,
cpus1-4, cpus1-5, cpus1-6, cpus1-7
tmu_sub0: cpus0-4, cpus0-5, cpus0-6, cpus0-7,
cpus2-0, cpus2-1, cpus2-2, cpus2-3
tmu_sub1: gpu0, gpu1, gpu2, gpu3, npu0, npu1
Signed-off-by: Shin Son <shin.son@samsung.com>
---
.../boot/dts/exynos/exynosautov920-tmu.dtsi | 377 ++++++++++++++++++
.../arm64/boot/dts/exynos/exynosautov920.dtsi | 31 ++
2 files changed, 408 insertions(+)
create mode 100644 arch/arm64/boot/dts/exynos/exynosautov920-tmu.dtsi
diff --git a/arch/arm64/boot/dts/exynos/exynosautov920-tmu.dtsi b/arch/arm64/boot/dts/exynos/exynosautov920-tmu.dtsi
new file mode 100644
index 000000000000..641d142e0eeb
--- /dev/null
+++ b/arch/arm64/boot/dts/exynos/exynosautov920-tmu.dtsi
@@ -0,0 +1,377 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Samsung's ExynosAuto920 TMU configurations device tree source
+ *
+ * Copyright (c) 2020 Samsung Electronics Co., Ltd.
+ *
+ * Samsung's ExynosAuto920 SoC TMU(Thermal Managemenut Unit) are listed as
+ * device tree nodes in this file.
+ */
+
+/ {
+ thermal-zones {
+ cpus0-0-thermal {
+ polling-delay-passive = <0>;
+ polling-delay = <0>;
+ thermal-sensors = <&tmu_top 9>;
+
+ trips {
+ cpus0_0_critical: cpus0-0-critical {
+ temperature = <125000>; /* millicelsius */
+ hysteresis = <0>; /* millicelsius */
+ type = "critical";
+ };
+ };
+ };
+
+ cpus0-1-thermal {
+ polling-delay-passive = <0>;
+ polling-delay = <0>;
+ thermal-sensors = <&tmu_top 10>;
+
+ trips {
+ cpus0_1_critical: cpus0-1-critical {
+ temperature = <125000>; /* millicelsius */
+ hysteresis = <0>; /* millicelsius */
+ type = "critical";
+ };
+ };
+ };
+
+ cpus0-2-thermal {
+ polling-delay-passive = <0>;
+ polling-delay = <0>;
+ thermal-sensors = <&tmu_top 11>;
+
+ trips {
+ cpus0_2_critical: cpus0-2-critical {
+ temperature = <125000>; /* millicelsius */
+ hysteresis = <0>; /* millicelsius */
+ type = "critical";
+ };
+ };
+ };
+
+ cpus0-3-thermal {
+ polling-delay-passive = <0>;
+ polling-delay = <0>;
+ thermal-sensors = <&tmu_top 12>;
+
+ trips {
+ cpus0_3_critical: cpus0-3-critical {
+ temperature = <125000>; /* millicelsius */
+ hysteresis = <0>; /* millicelsius */
+ type = "critical";
+ };
+ };
+ };
+
+ cpus0-4-thermal {
+ polling-delay-passive = <0>;
+ polling-delay = <0>;
+ thermal-sensors = <&tmu_sub0 7>;
+
+ trips {
+ cpus0_4_critical: cpus0-4-critical {
+ temperature = <125000>; /* millicelsius */
+ hysteresis = <0>; /* millicelsius */
+ type = "critical";
+ };
+ };
+ };
+
+ cpus0-5-thermal {
+ polling-delay-passive = <0>;
+ polling-delay = <0>;
+ thermal-sensors = <&tmu_sub0 8>;
+
+ trips {
+ cpus0_5_critical: cpus0-5-critical {
+ temperature = <125000>; /* millicelsius */
+ hysteresis = <0>; /* millicelsius */
+ type = "critical";
+ };
+ };
+ };
+
+ cpus0-6-thermal {
+ polling-delay-passive = <0>;
+ polling-delay = <0>;
+ thermal-sensors = <&tmu_sub0 9>;
+
+ trips {
+ cpus0_6_critical: cpus0-6-critical {
+ temperature = <125000>; /* millicelsius */
+ hysteresis = <0>; /* millicelsius */
+ type = "critical";
+ };
+ };
+ };
+
+ cpus0-7-thermal {
+ polling-delay-passive = <0>;
+ polling-delay = <0>;
+ thermal-sensors = <&tmu_sub0 10>;
+
+ trips {
+ cpus0_7_critical: cpus0-7-critical {
+ temperature = <125000>; /* millicelsius */
+ hysteresis = <0>; /* millicelsius */
+ type = "critical";
+ };
+ };
+ };
+
+ cpus1-0-thermal {
+ polling-delay-passive = <0>;
+ polling-delay = <0>;
+ thermal-sensors = <&tmu_top 1>;
+
+ trips {
+ cpus1_0_critical: cpus1-0-critical {
+ temperature = <125000>; /* millicelsius */
+ hysteresis = <0>; /* millicelsius */
+ type = "critical";
+ };
+ };
+ };
+
+ cpus1-1-thermal {
+ polling-delay-passive = <0>;
+ polling-delay = <0>;
+ thermal-sensors = <&tmu_top 2>;
+
+ trips {
+ cpus1_1_critical: cpus1-1-critical {
+ temperature = <125000>; /* millicelsius */
+ hysteresis = <0>; /* millicelsius */
+ type = "critical";
+ };
+ };
+ };
+
+ cpus1-2-thermal {
+ polling-delay-passive = <0>;
+ polling-delay = <0>;
+ thermal-sensors = <&tmu_top 3>;
+
+ trips {
+ cpus1_2_critical: cpus1-2-critical {
+ temperature = <125000>; /* millicelsius */
+ hysteresis = <0>; /* millicelsius */
+ type = "critical";
+ };
+ };
+ };
+
+ cpus1-3-thermal {
+ polling-delay-passive = <0>;
+ polling-delay = <0>;
+ thermal-sensors = <&tmu_top 4>;
+
+ trips {
+ cpus1_3_critical: cpus1-3-critical {
+ temperature = <125000>; /* millicelsius */
+ hysteresis = <0>; /* millicelsius */
+ type = "critical";
+ };
+ };
+ };
+
+ cpus1-4-thermal {
+ polling-delay-passive = <0>;
+ polling-delay = <0>;
+ thermal-sensors = <&tmu_top 5>;
+
+ trips {
+ cpus1_4_critical: cpus1-4-critical {
+ temperature = <125000>; /* millicelsius */
+ hysteresis = <0>; /* millicelsius */
+ type = "critical";
+ };
+ };
+ };
+
+ cpus1-5-thermal {
+ polling-delay-passive = <0>;
+ polling-delay = <0>;
+ thermal-sensors = <&tmu_top 6>;
+
+ trips {
+ cpus1_5_critical: cpus1-5-critical {
+ temperature = <125000>; /* millicelsius */
+ hysteresis = <0>; /* millicelsius */
+ type = "critical";
+ };
+ };
+ };
+
+ cpus1-6-thermal {
+ polling-delay-passive = <0>;
+ polling-delay = <0>;
+ thermal-sensors = <&tmu_top 7>;
+
+ trips {
+ cpus1_6_critical: cpus1-6-critical {
+ temperature = <125000>; /* millicelsius */
+ hysteresis = <0>; /* millicelsius */
+ type = "critical";
+ };
+ };
+ };
+
+ cpus1-7-thermal {
+ polling-delay-passive = <0>;
+ polling-delay = <0>;
+ thermal-sensors = <&tmu_top 8>;
+
+ trips {
+ cpus1_7_critical: cpus1-7-critical {
+ temperature = <125000>; /* millicelsius */
+ hysteresis = <0>; /* millicelsius */
+ type = "critical";
+ };
+ };
+ };
+
+ cpus2-0-thermal {
+ polling-delay-passive = <0>;
+ polling-delay = <0>;
+ thermal-sensors = <&tmu_sub0 3>;
+
+ trips {
+ cpus2_0_critical: cpus2-0-critical {
+ temperature = <125000>; /* millicelsius */
+ hysteresis = <0>; /* millicelsius */
+ type = "critical";
+ };
+ };
+ };
+
+ cpus2-1-thermal {
+ polling-delay-passive = <0>;
+ polling-delay = <0>;
+ thermal-sensors = <&tmu_sub0 4>;
+
+ trips {
+ cpus2_1_critical: cpus2-1-critical {
+ temperature = <125000>; /* millicelsius */
+ hysteresis = <0>; /* millicelsius */
+ type = "critical";
+ };
+ };
+ };
+
+ cpus2-2-thermal {
+ polling-delay-passive = <0>;
+ polling-delay = <0>;
+ thermal-sensors = <&tmu_sub0 5>;
+
+ trips {
+ cpus2_2_critical: cpus2-2-critical {
+ temperature = <125000>; /* millicelsius */
+ hysteresis = <0>; /* millicelsius */
+ type = "critical";
+ };
+ };
+ };
+
+ cpus2-3-thermal {
+ polling-delay-passive = <0>;
+ polling-delay = <0>;
+ thermal-sensors = <&tmu_sub0 6>;
+
+ trips {
+ cpus2_3_critical: cpus2-3-critical {
+ temperature = <125000>; /* millicelsius */
+ hysteresis = <0>; /* millicelsius */
+ type = "critical";
+ };
+ };
+ };
+
+ gpu0-thermal {
+ polling-delay-passive = <0>;
+ polling-delay = <0>;
+ thermal-sensors = <&tmu_sub1 1>;
+
+ trips {
+ gpu0_critical: gpu0-critical {
+ temperature = <125000>; /* millicelsius */
+ hysteresis = <0>; /* millicelsius */
+ type = "critical";
+ };
+ };
+ };
+
+ gpu1-thermal {
+ polling-delay-passive = <0>;
+ polling-delay = <0>;
+ thermal-sensors = <&tmu_sub1 2>;
+
+ trips {
+ gpu1_critical: gpu1-critical {
+ temperature = <125000>; /* millicelsius */
+ hysteresis = <0>; /* millicelsius */
+ type = "critical";
+ };
+ };
+ };
+
+ gpu2-thermal {
+ polling-delay-passive = <0>;
+ polling-delay = <0>;
+ thermal-sensors = <&tmu_sub1 3>;
+
+ trips {
+ gpu2_critical: gpu2-critical {
+ temperature = <125000>; /* millicelsius */
+ hysteresis = <0>; /* millicelsius */
+ type = "critical";
+ };
+ };
+ };
+
+ gpu3-thermal {
+ polling-delay-passive = <0>;
+ polling-delay = <0>;
+ thermal-sensors = <&tmu_sub1 4>;
+
+ trips {
+ gpu3_critical: gpu3-critical {
+ temperature = <125000>; /* millicelsius */
+ hysteresis = <0>; /* millicelsius */
+ type = "critical";
+ };
+ };
+ };
+
+ npu0-thermal {
+ polling-delay-passive = <0>;
+ polling-delay = <0>;
+ thermal-sensors = <&tmu_sub1 6>;
+
+ trips {
+ npu0_critical: npu0-critical {
+ temperature = <125000>; /* millicelsius */
+ hysteresis = <0>; /* millicelsius */
+ type = "critical";
+ };
+ };
+ };
+
+ npu1-thermal {
+ polling-delay-passive = <0>;
+ polling-delay = <0>;
+ thermal-sensors = <&tmu_sub1 7>;
+
+ trips {
+ npu1_critical: npu1-critical {
+ temperature = <125000>; /* millicelsius */
+ hysteresis = <0>; /* millicelsius */
+ type = "critical";
+ };
+ };
+ };
+ };
+};
diff --git a/arch/arm64/boot/dts/exynos/exynosautov920.dtsi b/arch/arm64/boot/dts/exynos/exynosautov920.dtsi
index 0fdf2062930a..fba403e48aed 100644
--- a/arch/arm64/boot/dts/exynos/exynosautov920.dtsi
+++ b/arch/arm64/boot/dts/exynos/exynosautov920.dtsi
@@ -330,6 +330,36 @@ watchdog_cl1: watchdog@10070000 {
samsung,cluster-index = <1>;
};
+ tmu_top: tmu@100a0000 {
+ compatible = "samsung,exynosautov920-tmu";
+ reg = <0x100A0000 0x1000>;
+ interrupts = <GIC_SPI 951 IRQ_TYPE_LEVEL_HIGH>;
+ #thermal-sensor-cells = <1>;
+ clocks = <&cmu_misc CLK_DOUT_MISC_NOCP>;
+ clock-names = "tmu_apbif";
+ samsung,sensors = <12>;
+ };
+
+ tmu_sub0: tmu@100b0000 {
+ compatible = "samsung,exynosautov920-tmu";
+ reg = <0x100B0000 0x1000>;
+ interrupts = <GIC_SPI 950 IRQ_TYPE_LEVEL_HIGH>;
+ #thermal-sensor-cells = <1>;
+ clocks = <&cmu_misc CLK_DOUT_MISC_NOCP>;
+ clock-names = "tmu_apbif";
+ samsung,sensors = <10>;
+ };
+
+ tmu_sub1: tmu@100c0000 {
+ compatible = "samsung,exynosautov920-tmu";
+ reg = <0x100C0000 0x1000>;
+ interrupts = <GIC_SPI 949 IRQ_TYPE_LEVEL_HIGH>;
+ #thermal-sensor-cells = <1>;
+ clocks = <&cmu_misc CLK_DOUT_MISC_NOCP>;
+ clock-names = "tmu_apbif";
+ samsung,sensors = <7>;
+ };
+
gic: interrupt-controller@10400000 {
compatible = "arm,gic-v3";
#interrupt-cells = <3>;
@@ -1507,3 +1537,4 @@ timer {
};
#include "exynosautov920-pinctrl.dtsi"
+#include "exynosautov920-tmu.dtsi"
--
2.50.1On 30/09/2025 02:51, Shin Son wrote:
> diff --git a/arch/arm64/boot/dts/exynos/exynosautov920.dtsi b/arch/arm64/boot/dts/exynos/exynosautov920.dtsi
> index 0fdf2062930a..fba403e48aed 100644
> --- a/arch/arm64/boot/dts/exynos/exynosautov920.dtsi
> +++ b/arch/arm64/boot/dts/exynos/exynosautov920.dtsi
> @@ -330,6 +330,36 @@ watchdog_cl1: watchdog@10070000 {
> samsung,cluster-index = <1>;
> };
>
> + tmu_top: tmu@100a0000 {
> + compatible = "samsung,exynosautov920-tmu";
> + reg = <0x100A0000 0x1000>;
I guess there will be new version, so nitpick: please use lowercase hex.
Best regards,
Krzysztof
Hello Krzysztof Kozlowski,
> -----Original Message-----
> From: Krzysztof Kozlowski [mailto:krzk@kernel.org]
> Sent: Friday, October 10, 2025 9:46 PM
> To: Shin Son <shin.son@samsung.com>; Bartlomiej Zolnierkiewicz
> <bzolnier@gmail.com>; Rafael J . Wysocki <rafael@kernel.org>; Daniel
> Lezcano <daniel.lezcano@linaro.org>; Zhang Rui <rui.zhang@intel.com>;
> Lukasz Luba <lukasz.luba@arm.com>; Rob Herring <robh@kernel.org>; Conor
> Dooley <conor+dt@kernel.org>; Alim Akhtar <alim.akhtar@samsung.com>;
> Henrik Grimler <henrik@grimler.se>
> Cc: linux-pm@vger.kernel.org; linux-samsung-soc@vger.kernel.org;
> devicetree@vger.kernel.org; linux-arm-kernel@lists.infradead.org; linux-
> kernel@vger.kernel.org
> Subject: Re: [PATCH v6 3/3] arm64: dts: exynosautov920: Add multiple
> sensors
>
> On 30/09/2025 02:51, Shin Son wrote:
> > diff --git a/arch/arm64/boot/dts/exynos/exynosautov920.dtsi
> b/arch/arm64/boot/dts/exynos/exynosautov920.dtsi
> > index 0fdf2062930a..fba403e48aed 100644
> > --- a/arch/arm64/boot/dts/exynos/exynosautov920.dtsi
> > +++ b/arch/arm64/boot/dts/exynos/exynosautov920.dtsi
> > @@ -330,6 +330,36 @@ watchdog_cl1: watchdog@10070000 {
> > samsung,cluster-index = <1>;
> > };
> >
> > + tmu_top: tmu@100a0000 {
> > + compatible = "samsung,exynosautov920-tmu";
> > + reg = <0x100A0000 0x1000>;
>
> I guess there will be new version, so nitpick: please use lowercase hex.
>
>
> Best regards,
> Krzysztof
Ok, I'll use the lowercase hex.
Thanks for your feedback.
Best regards,
Shin Son.
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