[PATCH v1 0/3] arm64: dts: amlogic: a1: introduce thermal setup

[PATCH v1 0/3] arm64: dts: amlogic: a1: introduce thermal setup

[Dmitry Rokosov]

This patch series introduces thermal sensor declaration to the Meson A1
common dtsi file. It also sets up thermal zones for the AD402 reference
board. It depends on the series with A1 thermal support at [1].

Links:
[1] - https://lore.kernel.org/all/20240328133802.15651-1-ddrokosov@salutedevices.com/

Dmitry Rokosov (3):
  arm64: dts: amlogic: a1: add cooling-cells for DVFS feature
  arm64: dts: amlogic: a1: introduce cpu temperature sensor
  arm64: dts: amlogic: ad402: setup thermal-zones

 .../arm64/boot/dts/amlogic/meson-a1-ad402.dts | 45 +++++++++++++++++++
 arch/arm64/boot/dts/amlogic/meson-a1.dtsi     | 14 ++++++
 2 files changed, 59 insertions(+)

-- 
2.43.0


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[PATCH v1 1/3] arm64: dts: amlogic: a1: add cooling-cells for DVFS feature

[Dmitry Rokosov]

It's used for CPU with DVFS feature to specify minimum and maximum
cooling state used in the reference.
Without these values DVFS will not work and dtbs_check will raise the
error.

Signed-off-by: Dmitry Rokosov <ddrokosov@salutedevices.com>
---
 arch/arm64/boot/dts/amlogic/meson-a1.dtsi | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/boot/dts/amlogic/meson-a1.dtsi b/arch/arm64/boot/dts/amlogic/meson-a1.dtsi
index fbee986421f1..f65d4a77ee52 100644
--- a/arch/arm64/boot/dts/amlogic/meson-a1.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-a1.dtsi
@@ -32,6 +32,7 @@ cpu0: cpu@0 {
 			reg = <0x0 0x0>;
 			enable-method = "psci";
 			next-level-cache = <&l2>;
+			#cooling-cells = <2>;
 		};
 
 		cpu1: cpu@1 {
@@ -40,6 +41,7 @@ cpu1: cpu@1 {
 			reg = <0x0 0x1>;
 			enable-method = "psci";
 			next-level-cache = <&l2>;
+			#cooling-cells = <2>;
 		};
 
 		l2: l2-cache0 {
-- 
2.43.0


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Re: [PATCH v1 1/3] arm64: dts: amlogic: a1: add cooling-cells for DVFS feature

[neil.armstrong]

On 28/03/2024 14:44, Dmitry Rokosov wrote:
> It's used for CPU with DVFS feature to specify minimum and maximum
> cooling state used in the reference.
> Without these values DVFS will not work and dtbs_check will raise the
> error.
> 
> Signed-off-by: Dmitry Rokosov <ddrokosov@salutedevices.com>
> ---
>   arch/arm64/boot/dts/amlogic/meson-a1.dtsi | 2 ++
>   1 file changed, 2 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/amlogic/meson-a1.dtsi b/arch/arm64/boot/dts/amlogic/meson-a1.dtsi
> index fbee986421f1..f65d4a77ee52 100644
> --- a/arch/arm64/boot/dts/amlogic/meson-a1.dtsi
> +++ b/arch/arm64/boot/dts/amlogic/meson-a1.dtsi
> @@ -32,6 +32,7 @@ cpu0: cpu@0 {
>   			reg = <0x0 0x0>;
>   			enable-method = "psci";
>   			next-level-cache = <&l2>;
> +			#cooling-cells = <2>;
>   		};
>   
>   		cpu1: cpu@1 {
> @@ -40,6 +41,7 @@ cpu1: cpu@1 {
>   			reg = <0x0 0x1>;
>   			enable-method = "psci";
>   			next-level-cache = <&l2>;
> +			#cooling-cells = <2>;
>   		};
>   
>   		l2: l2-cache0 {

Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>

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[PATCH v1 2/3] arm64: dts: amlogic: a1: introduce cpu temperature sensor

[Dmitry Rokosov]

The A1 SoC family has only one thermal sensor for CPU temperature
measurement. It is required to set the TS clock rate to 500kHz to make
it workable.

Signed-off-by: Dmitry Rokosov <ddrokosov@salutedevices.com>
---
 arch/arm64/boot/dts/amlogic/meson-a1.dtsi | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/arm64/boot/dts/amlogic/meson-a1.dtsi b/arch/arm64/boot/dts/amlogic/meson-a1.dtsi
index f65d4a77ee52..6f0d0e07e037 100644
--- a/arch/arm64/boot/dts/amlogic/meson-a1.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-a1.dtsi
@@ -854,6 +854,18 @@ usb2_phy1: phy@4000 {
 				power-domains = <&pwrc PWRC_USB_ID>;
 			};
 
+			cpu_temp: temperature-sensor@4c00 {
+				compatible = "amlogic,a1-cpu-thermal",
+					     "amlogic,a1-thermal";
+				reg = <0x0 0x4c00 0x0 0x50>;
+				interrupts = <GIC_SPI 57 IRQ_TYPE_LEVEL_HIGH>;
+				clocks = <&clkc_periphs CLKID_TS>;
+				assigned-clocks = <&clkc_periphs CLKID_TS>;
+				assigned-clock-rates = <500000>;
+				#thermal-sensor-cells = <0>;
+				amlogic,ao-secure = <&sec_AO>;
+			};
+
 			hwrng: rng@5118 {
 				compatible = "amlogic,meson-rng";
 				reg = <0x0 0x5118 0x0 0x4>;
-- 
2.43.0


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[PATCH v1 3/3] arm64: dts: amlogic: ad402: setup thermal-zones

[Dmitry Rokosov]

There is one thermal zone with 3 trip points: soc_passive, soc_hot, and
soc_critical, as well as two cooling maps.

Signed-off-by: Dmitry Rokosov <ddrokosov@salutedevices.com>
---
 .../arm64/boot/dts/amlogic/meson-a1-ad402.dts | 45 +++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/arch/arm64/boot/dts/amlogic/meson-a1-ad402.dts b/arch/arm64/boot/dts/amlogic/meson-a1-ad402.dts
index 6c02301840ff..2d22e8b45c6d 100644
--- a/arch/arm64/boot/dts/amlogic/meson-a1-ad402.dts
+++ b/arch/arm64/boot/dts/amlogic/meson-a1-ad402.dts
@@ -7,6 +7,7 @@
 /dts-v1/;
 
 #include "meson-a1.dtsi"
+#include <dt-bindings/thermal/thermal.h>
 
 #include <dt-bindings/gpio/gpio.h>
 
@@ -177,6 +178,50 @@ codec {
 			};
 		};
 	};
+
+	thermal-zones {
+		soc_thermal: soc_thermal {
+			polling-delay = <1000>;
+			polling-delay-passive = <100>;
+			sustainable-power = <130>;
+
+			thermal-sensors = <&cpu_temp>;
+
+			trips {
+				soc_passive: soc-passive {
+					temperature = <70000>;
+					hysteresis = <2000>;
+					type = "passive";
+				};
+
+				soc_hot: soc-hot {
+					temperature = <85000>;
+					hysteresis = <5000>;
+					type = "hot";
+				};
+
+				soc_critical: soc-critical {
+					temperature = <110000>;
+					hysteresis = <1000>;
+					type = "critical";
+				};
+			};
+
+			soc_cooling_maps: cooling-maps {
+				map0 {
+					trip = <&soc_passive>;
+					cooling-device = <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+							 <&cpu1 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+				};
+
+				map1 {
+					trip = <&soc_hot>;
+					cooling-device = <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+							 <&cpu1 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+				};
+			};
+		};
+	};
 };
 
 /* Bluetooth HCI H4 */
-- 
2.43.0


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