[PATCH v4 1/6] arm64: dts: rockchip: add thermal zones information on RK3588

[Alexey Charkov]

This includes the necessary device tree data to allow thermal
monitoring on RK3588(s) using the on-chip TSADC device, along with
trip points for automatic thermal management.

Each of the CPU clusters (one for the little cores and two for
the big cores) get a passive cooling trip point at 85C, which
will trigger DVFS throttling of the respective cluster upon
reaching a high temperature condition.

All zones also have a critical trip point at 115C, which will
trigger a reset.

Signed-off-by: Alexey Charkov <alchark at gmail.com>
---
 arch/arm64/boot/dts/rockchip/rk3588s.dtsi | 147 ++++++++++++++++++++++++++++++
 1 file changed, 147 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3588s.dtsi b/arch/arm64/boot/dts/rockchip/rk3588s.dtsi
index 6ac5ac8b48ab..ef06c1f742e8 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588s.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3588s.dtsi
@@ -10,6 +10,7 @@
 #include <dt-bindings/reset/rockchip,rk3588-cru.h>
 #include <dt-bindings/phy/phy.h>
 #include <dt-bindings/ata/ahci.h>
+#include <dt-bindings/thermal/thermal.h>
 
 / {
 	compatible = "rockchip,rk3588";
@@ -2368,6 +2369,152 @@ pwm15: pwm at febf0030 {
 		status = "disabled";
 	};
 
+	thermal_zones: thermal-zones {
+		/* sensor near the center of the SoC */
+		package_thermal: package-thermal {
+			polling-delay-passive = <0>;
+			polling-delay = <0>;
+			thermal-sensors = <&tsadc 0>;
+
+			trips {
+				package_crit: package-crit {
+					temperature = <115000>;
+					hysteresis = <0>;
+					type = "critical";
+				};
+			};
+		};
+
+		/* sensor between A76 cores 0 and 1 */
+		bigcore0_thermal: bigcore0-thermal {
+			polling-delay-passive = <100>;
+			polling-delay = <0>;
+			thermal-sensors = <&tsadc 1>;
+
+			trips {
+				bigcore0_alert: bigcore0-alert {
+					temperature = <85000>;
+					hysteresis = <2000>;
+					type = "passive";
+				};
+				bigcore0_crit: bigcore0-crit {
+					temperature = <115000>;
+					hysteresis = <0>;
+					type = "critical";
+				};
+			};
+			cooling-maps {
+				map0 {
+					trip = <&bigcore0_alert>;
+					cooling-device =
+						<&cpu_b0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+						<&cpu_b1 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+				};
+			};
+		};
+
+		/* sensor between A76 cores 2 and 3 */
+		bigcore2_thermal: bigcore2-thermal {
+			polling-delay-passive = <100>;
+			polling-delay = <0>;
+			thermal-sensors = <&tsadc 2>;
+
+			trips {
+				bigcore2_alert: bigcore2-alert {
+					temperature = <85000>;
+					hysteresis = <2000>;
+					type = "passive";
+				};
+				bigcore2_crit: bigcore2-crit {
+					temperature = <115000>;
+					hysteresis = <0>;
+					type = "critical";
+				};
+			};
+			cooling-maps {
+				map0 {
+					trip = <&bigcore2_alert>;
+					cooling-device =
+						<&cpu_b2 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+						<&cpu_b3 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+				};
+			};
+		};
+
+		/* sensor between the four A55 cores */
+		little_core_thermal: littlecore-thermal {
+			polling-delay-passive = <100>;
+			polling-delay = <0>;
+			thermal-sensors = <&tsadc 3>;
+
+			trips {
+				littlecore_alert: littlecore-alert {
+					temperature = <85000>;
+					hysteresis = <2000>;
+					type = "passive";
+				};
+				littlecore_crit: littlecore-crit {
+					temperature = <115000>;
+					hysteresis = <0>;
+					type = "critical";
+				};
+			};
+			cooling-maps {
+				map0 {
+					trip = <&littlecore_alert>;
+					cooling-device =
+						<&cpu_l0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+						<&cpu_l1 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+						<&cpu_l2 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+						<&cpu_l3 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+				};
+			};
+		};
+
+		/* sensor near the PD_CENTER power domain */
+		center_thermal: center-thermal {
+			polling-delay-passive = <0>;
+			polling-delay = <0>;
+			thermal-sensors = <&tsadc 4>;
+
+			trips {
+				center_crit: center-crit {
+					temperature = <115000>;
+					hysteresis = <0>;
+					type = "critical";
+				};
+			};
+		};
+
+		gpu_thermal: gpu-thermal {
+			polling-delay-passive = <0>;
+			polling-delay = <0>;
+			thermal-sensors = <&tsadc 5>;
+
+			trips {
+				gpu_crit: gpu-crit {
+					temperature = <115000>;
+					hysteresis = <0>;
+					type = "critical";
+				};
+			};
+		};
+
+		npu_thermal: npu-thermal {
+			polling-delay-passive = <0>;
+			polling-delay = <0>;
+			thermal-sensors = <&tsadc 6>;
+
+			trips {
+				npu_crit: npu-crit {
+					temperature = <115000>;
+					hysteresis = <0>;
+					type = "critical";
+				};
+			};
+		};
+	};
+
 	tsadc: tsadc at fec00000 {
 		compatible = "rockchip,rk3588-tsadc";
 		reg = <0x0 0xfec00000 0x0 0x400>;

-- 
2.45.0