arm64: dts: r8a7795: Add cpuidle support for CA53 cores

Enables cpuidle (core shutdown) support for R-Car H3 CA53 cores.
Signed-off-by: Dien Pham <dien.pham.ry@renesas.com>
Signed-off-by: Takeshi Kihara <takeshi.kihara.df@renesas.com>
Signed-off-by: Ulrich Hecht <uli+renesas@fpond.eu>
Link: https://lore.kernel.org/r/1547808474-19427-3-git-send-email-uli+renesas@fpond.euSigned-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

arch/arm64/boot/dts/renesas/r8a7795.dtsi

@@ -212,6 +212,7 @@ a53_0: cpu@100 {
 			power-domains = <&sysc R8A7795_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 R8A7795_CLK_Z2>;
@@ -226,6 +227,7 @@ a53_1: cpu@101 {
 			power-domains = <&sysc R8A7795_PD_CA53_CPU1>;
 			next-level-cache = <&L2_CA53>;
 			enable-method = "psci";
+			cpu-idle-states = <&CPU_SLEEP_1>;
 			clocks = <&cpg CPG_CORE R8A7795_CLK_Z2>;
 			operating-points-v2 = <&cluster1_opp>;
 			capacity-dmips-mhz = <535>;
@@ -238,6 +240,7 @@ a53_2: cpu@102 {
 			power-domains = <&sysc R8A7795_PD_CA53_CPU2>;
 			next-level-cache = <&L2_CA53>;
 			enable-method = "psci";
+			cpu-idle-states = <&CPU_SLEEP_1>;
 			clocks = <&cpg CPG_CORE R8A7795_CLK_Z2>;
 			operating-points-v2 = <&cluster1_opp>;
 			capacity-dmips-mhz = <535>;
@@ -250,6 +253,7 @@ a53_3: cpu@103 {
 			power-domains = <&sysc R8A7795_PD_CA53_CPU3>;
 			next-level-cache = <&L2_CA53>;
 			enable-method = "psci";
+			cpu-idle-states = <&CPU_SLEEP_1>;
 			clocks = <&cpg CPG_CORE R8A7795_CLK_Z2>;
 			operating-points-v2 = <&cluster1_opp>;
 			capacity-dmips-mhz = <535>;
@@ -280,6 +284,15 @@ CPU_SLEEP_0: cpu-sleep-0 {
 				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>;
+			};
 		};
 	};