arm64: dts: renesas: r8a77990: Add CPUIdle support for CA53 cores

Enable cpuidle (core shutdown) support for the CA53 cores on R-Car E3.

Signed-off-by: Takeshi Kihara <takeshi.kihara.df@renesas.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20200309171200.21226-1-geert+renesas@glider.be

diff --git a/arch/arm64/boot/dts/renesas/r8a77990.dtsi b/arch/arm64/boot/dts/renesas/r8a77990.dtsi
index 0ad20b78e6eb62fd852337a1ef54d9cfa70a7bff..1543f18e834f4beaec882a411c5f4d72be9b8eac 100644 (file)
--- a/arch/arm64/boot/dts/renesas/r8a77990.dtsi
+++ b/arch/arm64/boot/dts/renesas/r8a77990.dtsi
@@ -88,6 +88,7 @@
                        power-domains = <&sysc R8A77990_PD_CA53_CPU0>;
                        next-level-cache = <&L2_CA53>;
                        enable-method = "psci";
+                       cpu-idle-states = <&CPU_SLEEP_0>;
                        dynamic-power-coefficient = <277>;
                        clocks =<&cpg CPG_CORE R8A77990_CLK_Z2>;
                        operating-points-v2 = <&cluster1_opp>;
@@ -100,6 +101,7 @@
                        power-domains = <&sysc R8A77990_PD_CA53_CPU1>;
                        next-level-cache = <&L2_CA53>;
                        enable-method = "psci";
+                       cpu-idle-states = <&CPU_SLEEP_0>;
                        clocks =<&cpg CPG_CORE R8A77990_CLK_Z2>;
                        operating-points-v2 = <&cluster1_opp>;
                };
@@ -110,6 +112,19 @@
                        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 = <700>;
+                               exit-latency-us = <700>;
+                               min-residency-us = <5000>;
+                       };
+               };
        };
 
        extal_clk: extal {