arm64: dts: renesas: r8a779f0: Add CPUIdle support

Support CPUIdle for ARM Cortex-A55 on R-Car S4-8.

Signed-off-by: Tho Vu <tho.vu.wh@renesas.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Tested-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Link: https://lore.kernel.org/r/5310792ce4c06515a5373ff44ceb9b925f007489.1654701480.git.geert+renesas@glider.be

diff --git a/arch/arm64/boot/dts/renesas/r8a779f0.dtsi b/arch/arm64/boot/dts/renesas/r8a779f0.dtsi
index 4234781..8e612eb 100644 (file)
--- a/arch/arm64/boot/dts/renesas/r8a779f0.dtsi
+++ b/arch/arm64/boot/dts/renesas/r8a779f0.dtsi
@@ -63,6 +63,7 @@
                        power-domains = <&sysc R8A779F0_PD_A1E0D0C0>;
                        next-level-cache = <&L3_CA55_0>;
                        enable-method = "psci";
+                       cpu-idle-states = <&CPU_SLEEP_0>;
                };
 
                a55_1: cpu@100 {
@@ -72,6 +73,7 @@
                        power-domains = <&sysc R8A779F0_PD_A1E0D0C1>;
                        next-level-cache = <&L3_CA55_0>;
                        enable-method = "psci";
+                       cpu-idle-states = <&CPU_SLEEP_0>;
                };
 
                a55_2: cpu@10000 {
@@ -81,6 +83,7 @@
                        power-domains = <&sysc R8A779F0_PD_A1E0D1C0>;
                        next-level-cache = <&L3_CA55_1>;
                        enable-method = "psci";
+                       cpu-idle-states = <&CPU_SLEEP_0>;
                };
 
                a55_3: cpu@10100 {
@@ -90,6 +93,7 @@
                        power-domains = <&sysc R8A779F0_PD_A1E0D1C1>;
                        next-level-cache = <&L3_CA55_1>;
                        enable-method = "psci";
+                       cpu-idle-states = <&CPU_SLEEP_0>;
                };
 
                a55_4: cpu@20000 {
@@ -99,6 +103,7 @@
                        power-domains = <&sysc R8A779F0_PD_A1E1D0C0>;
                        next-level-cache = <&L3_CA55_2>;
                        enable-method = "psci";
+                       cpu-idle-states = <&CPU_SLEEP_0>;
                };
 
                a55_5: cpu@20100 {
@@ -108,6 +113,7 @@
                        power-domains = <&sysc R8A779F0_PD_A1E1D0C1>;
                        next-level-cache = <&L3_CA55_2>;
                        enable-method = "psci";
+                       cpu-idle-states = <&CPU_SLEEP_0>;
                };
 
                a55_6: cpu@30000 {
@@ -117,6 +123,7 @@
                        power-domains = <&sysc R8A779F0_PD_A1E1D1C0>;
                        next-level-cache = <&L3_CA55_3>;
                        enable-method = "psci";
+                       cpu-idle-states = <&CPU_SLEEP_0>;
                };
 
                a55_7: cpu@30100 {
@@ -126,6 +133,7 @@
                        power-domains = <&sysc R8A779F0_PD_A1E1D1C1>;
                        next-level-cache = <&L3_CA55_3>;
                        enable-method = "psci";
+                       cpu-idle-states = <&CPU_SLEEP_0>;
                };
 
                L3_CA55_0: cache-controller-0 {
@@ -155,6 +163,19 @@
                        cache-unified;
                        cache-level = <3>;
                };
+
+               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>;
+                       };
+               };
        };
 
        extal_clk: extal {