From: Takeshi Kihara <takeshi.kihara.df@xxxxxxxxxxx>
Enable cpuidle (core shutdown) support for the CA57 cores on R-Car M3-N.
Signed-off-by: Takeshi Kihara <takeshi.kihara.df@xxxxxxxxxxx>
Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
---
To be queued in renesas-devel for v5.7.
arch/arm64/boot/dts/renesas/r8a77965.dtsi | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/arch/arm64/boot/dts/renesas/r8a77965.dtsi b/arch/arm64/boot/dts/renesas/r8a77965.dtsi
index f7468822e81e41d6..d82dd4e67b62b85c 100644
--- a/arch/arm64/boot/dts/renesas/r8a77965.dtsi
+++ b/arch/arm64/boot/dts/renesas/r8a77965.dtsi
@@ -111,6 +111,7 @@
power-domains = <&sysc R8A77965_PD_CA57_CPU0>;
next-level-cache = <&L2_CA57>;
enable-method = "psci";
+ cpu-idle-states = <&CPU_SLEEP_0>;
#cooling-cells = <2>;
dynamic-power-coefficient = <854>;
clocks = <&cpg CPG_CORE R8A77965_CLK_Z>;
@@ -124,6 +125,7 @@
power-domains = <&sysc R8A77965_PD_CA57_CPU1>;
next-level-cache = <&L2_CA57>;
enable-method = "psci";
+ cpu-idle-states = <&CPU_SLEEP_0>;
clocks = <&cpg CPG_CORE R8A77965_CLK_Z>;
operating-points-v2 = <&cluster0_opp>;
};
@@ -134,6 +136,19 @@
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 = <400>;
+ exit-latency-us = <500>;
+ min-residency-us = <4000>;
+ };
+ };
};
extal_clk: extal {
--
2.17.1
