arm64: dts: renesas: r8a774e1: Add cpuidle support for CA5x cores

Enable cpuidle (core shutdown) support for RZ/G2H CA5x cores.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20200827145315.26261-3-prabhakar.mahadev-lad.rj@bp.renesas.comSigned-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

arch/arm64/boot/dts/renesas/r8a774e1.dtsi

@@ -127,6 +127,7 @@ a57_0: cpu@0 {
 			power-domains = <&sysc R8A774E1_PD_CA57_CPU0>;
 			next-level-cache = <&L2_CA57>;
 			enable-method = "psci";
+			cpu-idle-states = <&CPU_SLEEP_0>;
 			dynamic-power-coefficient = <854>;
 			clocks = <&cpg CPG_CORE R8A774E1_CLK_Z>;
 			operating-points-v2 = <&cluster0_opp>;
@@ -141,6 +142,7 @@ a57_1: cpu@1 {
 			power-domains = <&sysc R8A774E1_PD_CA57_CPU1>;
 			next-level-cache = <&L2_CA57>;
 			enable-method = "psci";
+			cpu-idle-states = <&CPU_SLEEP_0>;
 			clocks = <&cpg CPG_CORE R8A774E1_CLK_Z>;
 			operating-points-v2 = <&cluster0_opp>;
 			capacity-dmips-mhz = <1024>;
@@ -154,6 +156,7 @@ a57_2: cpu@2 {
 			power-domains = <&sysc R8A774E1_PD_CA57_CPU2>;
 			next-level-cache = <&L2_CA57>;
 			enable-method = "psci";
+			cpu-idle-states = <&CPU_SLEEP_0>;
 			clocks = <&cpg CPG_CORE R8A774E1_CLK_Z>;
 			operating-points-v2 = <&cluster0_opp>;
 			capacity-dmips-mhz = <1024>;
@@ -167,6 +170,7 @@ a57_3: cpu@3 {
 			power-domains = <&sysc R8A774E1_PD_CA57_CPU3>;
 			next-level-cache = <&L2_CA57>;
 			enable-method = "psci";
+			cpu-idle-states = <&CPU_SLEEP_0>;
 			clocks = <&cpg CPG_CORE R8A774E1_CLK_Z>;
 			operating-points-v2 = <&cluster0_opp>;
 			capacity-dmips-mhz = <1024>;
@@ -180,6 +184,7 @@ a53_0: cpu@100 {
 			power-domains = <&sysc R8A774E1_PD_CA53_CPU0>;
 			next-level-cache = <&L2_CA53>;
 			enable-method = "psci";
+			cpu-idle-states = <&CPU_SLEEP_1>;
 			#cooling-cells = <2>;
 			dynamic-power-coefficient = <277>;
 			clocks = <&cpg CPG_CORE R8A774E1_CLK_Z2>;
@@ -194,6 +199,7 @@ a53_1: cpu@101 {
 			power-domains = <&sysc R8A774E1_PD_CA53_CPU1>;
 			next-level-cache = <&L2_CA53>;
 			enable-method = "psci";
+			cpu-idle-states = <&CPU_SLEEP_1>;
 			clocks = <&cpg CPG_CORE R8A774E1_CLK_Z2>;
 			operating-points-v2 = <&cluster1_opp>;
 			capacity-dmips-mhz = <535>;
@@ -206,6 +212,7 @@ a53_2: cpu@102 {
 			power-domains = <&sysc R8A774E1_PD_CA53_CPU2>;
 			next-level-cache = <&L2_CA53>;
 			enable-method = "psci";
+			cpu-idle-states = <&CPU_SLEEP_1>;
 			clocks = <&cpg CPG_CORE R8A774E1_CLK_Z2>;
 			operating-points-v2 = <&cluster1_opp>;
 			capacity-dmips-mhz = <535>;
@@ -218,6 +225,7 @@ a53_3: cpu@103 {
 			power-domains = <&sysc R8A774E1_PD_CA53_CPU3>;
 			next-level-cache = <&L2_CA53>;
 			enable-method = "psci";
+			cpu-idle-states = <&CPU_SLEEP_1>;
 			clocks = <&cpg CPG_CORE R8A774E1_CLK_Z2>;
 			operating-points-v2 = <&cluster1_opp>;
 			capacity-dmips-mhz = <535>;
@@ -236,6 +244,28 @@ L2_CA53: cache-controller-1 {
 			cache-unified;
 			cache-level = <2>;
 		};
+
+		idle-states {
+			entry-method = "psci";
+
+			CPU_SLEEP_0: cpu-sleep-0 {
+				compatible = "arm,idle-state";
+				arm,psci-suspend-param = <0x0010000>;
+				local-timer-stop;
+				entry-latency-us = <400>;
+				exit-latency-us = <500>;
+				min-residency-us = <4000>;
+			};
+
+			CPU_SLEEP_1: cpu-sleep-1 {
+				compatible = "arm,idle-state";
+				arm,psci-suspend-param = <0x0010000>;
+				local-timer-stop;
+				entry-latency-us = <700>;
+				exit-latency-us = <700>;
+				min-residency-us = <5000>;
+			};
+		};
 	};
 
 	extal_clk: extal {