From: Khiem Nguyen <[email protected]> Enable cpuidle (core shutdown) support for R-Car H3 CA57 cores.
Parameters were found after evaluation by [email protected]; they help to keep the performance and reduce the power consumption. Signed-off-by: Khiem Nguyen <[email protected]> [dien.pham.ry: Apply new cpuidle parameters] Signed-off-by: Dien Pham <[email protected]> Signed-off-by: Takeshi Kihara <[email protected]> Signed-off-by: Ulrich Hecht <[email protected]> --- arch/arm64/boot/dts/renesas/r8a7795.dtsi | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/arch/arm64/boot/dts/renesas/r8a7795.dtsi b/arch/arm64/boot/dts/renesas/r8a7795.dtsi index efc2477..64ab88a 100644 --- a/arch/arm64/boot/dts/renesas/r8a7795.dtsi +++ b/arch/arm64/boot/dts/renesas/r8a7795.dtsi @@ -123,6 +123,7 @@ power-domains = <&sysc R8A7795_PD_CA57_CPU0>; next-level-cache = <&L2_CA57>; enable-method = "psci"; + cpu-idle-states = <&CPU_SLEEP_0>; clocks =<&cpg CPG_CORE R8A7795_CLK_Z>; operating-points-v2 = <&cluster0_opp>; #cooling-cells = <2>; @@ -135,6 +136,7 @@ power-domains = <&sysc R8A7795_PD_CA57_CPU1>; next-level-cache = <&L2_CA57>; enable-method = "psci"; + cpu-idle-states = <&CPU_SLEEP_0>; clocks =<&cpg CPG_CORE R8A7795_CLK_Z>; operating-points-v2 = <&cluster0_opp>; #cooling-cells = <2>; @@ -147,6 +149,7 @@ power-domains = <&sysc R8A7795_PD_CA57_CPU2>; next-level-cache = <&L2_CA57>; enable-method = "psci"; + cpu-idle-states = <&CPU_SLEEP_0>; clocks =<&cpg CPG_CORE R8A7795_CLK_Z>; operating-points-v2 = <&cluster0_opp>; #cooling-cells = <2>; @@ -159,6 +162,7 @@ power-domains = <&sysc R8A7795_PD_CA57_CPU3>; next-level-cache = <&L2_CA57>; enable-method = "psci"; + cpu-idle-states = <&CPU_SLEEP_0>; clocks =<&cpg CPG_CORE R8A7795_CLK_Z>; operating-points-v2 = <&cluster0_opp>; #cooling-cells = <2>; @@ -221,6 +225,20 @@ 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>; + status = "okay"; + }; + }; }; extal_clk: extal { -- 2.7.4
