[Linux-stm32] [PATCH 7/7] arm64: dts: st: add power domains for STM32MP21 family

[Patrick Delaunay]

Add the PSCI power domain for STM32MP21 family on CPU and cluster,
and the D1 power domain for devices that require the Cortex-A35
cluster to remain in Run1. The wake-up handling is only managed
by the PSCI power domain with EXTI.

Signed-off-by: Patrick Delaunay <patrick.delaunay at foss.st.com>
---

 arch/arm64/boot/dts/st/stm32mp211.dtsi | 37 ++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/arch/arm64/boot/dts/st/stm32mp211.dtsi b/arch/arm64/boot/dts/st/stm32mp211.dtsi
index 4bfd58b26b51..aad7c87dc8ca 100644
--- a/arch/arm64/boot/dts/st/stm32mp211.dtsi
+++ b/arch/arm64/boot/dts/st/stm32mp211.dtsi
@@ -18,6 +18,21 @@ cpu0: cpu at 0 {
 			reg = <0>;
 			device_type = "cpu";
 			enable-method = "psci";
+			power-domains = <&cpu0_pd>;
+			power-domain-names = "psci";
+		};
+
+		idle-states {
+			entry-method = "psci";
+
+			cpu_sleep: cpu-sleep {
+				compatible = "arm,idle-state";
+				arm,psci-suspend-param = <0x00000002>;
+				local-timer-stop;
+				entry-latency-us = <150>;
+				exit-latency-us = <200>;
+				min-residency-us = <1000>;
+			};
 		};
 	};
 
@@ -70,9 +85,30 @@ scmi_reset: protocol at 16 {
 		};
 	};
 
+	d1_pd: power-domain-d1 {
+		compatible = "st,stm32mp-pm-domain";
+		#power-domain-cells = <0>;
+		power-domains = <&cluster_pd>;
+	};
+
 	psci {
 		compatible = "arm,psci-1.0";
 		method = "smc";
+
+		cpu0_pd: power-domain-cpu0 {
+			#power-domain-cells = <0>;
+			domain-idle-states = <&cpu_sleep>;
+			power-domains = <&cluster_pd>;
+		};
+
+		cluster_pd: power-domain-cluster {
+			#power-domain-cells = <0>;
+			power-domains = <&ret_pd>;
+		};
+
+		ret_pd: power-domain-retention {
+			#power-domain-cells = <0>;
+		};
 	};
 
 	timer {
@@ -108,6 +144,7 @@ usart2: serial at 400e0000 {
 				interrupts = <GIC_SPI 102 IRQ_TYPE_LEVEL_HIGH>;
 				clocks = <&ck_flexgen_08>;
 				access-controllers = <&rifsc 32>;
+				power-domains = <&d1_pd>;
 				status = "disabled";
 			};
 		};
-- 
2.43.0