As the rk3399 ATF had been supported on ARM github [0], so we can add idle-states for rk3399. This patch adds idle-states bindings data collected through tests experiments (latency and energy consumption) on rk3399 evb2 board. You can see detail idle-states definitions on document [1]. * arm,psci-suspend-param: power_state parameter to pass to the PSCI suspend call. * entry-latency: Worst case latency required to enter the idle state. The exit-latency may be guaranteed only after entry-latency has passed. * min-residency: Minimum period, including preparation and entry, for a given idle state to be worthwhile energywise * min-residency: Minimum period, including preparation and entry, for a given idle state to be worthwhile energywise. [0]: https://github.com/ARM-software/arm-trusted-firmware [1]: Documentation/devicetree/bindings/arm/psci.txt Documentation/devicetree/bindings/arm/idle-states.txt Signed-off-by: Caesar Wang <wxt@xxxxxxxxxxxxxx> --- arch/arm64/boot/dts/rockchip/rk3399.dtsi | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/arch/arm64/boot/dts/rockchip/rk3399.dtsi b/arch/arm64/boot/dts/rockchip/rk3399.dtsi index a6dd623..12ce265 100644 --- a/arch/arm64/boot/dts/rockchip/rk3399.dtsi +++ b/arch/arm64/boot/dts/rockchip/rk3399.dtsi @@ -101,6 +101,18 @@ }; }; + idle-states { + entry-method = "psci"; + cpu_sleep: cpu-sleep-0 { + compatible = "arm,idle-state"; + local-timer-stop; + arm,psci-suspend-param = <0x0010000>; + entry-latency-us = <350>; + exit-latency-us = <600>; + min-residency-us = <1150>; + }; + }; + cpu_l0: cpu@0 { device_type = "cpu"; compatible = "arm,cortex-a53", "arm,armv8"; @@ -108,6 +120,7 @@ enable-method = "psci"; #cooling-cells = <2>; /* min followed by max */ clocks = <&cru ARMCLKL>; + cpu-idle-states = <&cpu_sleep>; }; cpu_l1: cpu@1 { @@ -116,6 +129,7 @@ reg = <0x0 0x1>; enable-method = "psci"; clocks = <&cru ARMCLKL>; + cpu-idle-states = <&cpu_sleep>; }; cpu_l2: cpu@2 { @@ -124,6 +138,7 @@ reg = <0x0 0x2>; enable-method = "psci"; clocks = <&cru ARMCLKL>; + cpu-idle-states = <&cpu_sleep>; }; cpu_l3: cpu@3 { @@ -132,6 +147,7 @@ reg = <0x0 0x3>; enable-method = "psci"; clocks = <&cru ARMCLKL>; + cpu-idle-states = <&cpu_sleep>; }; cpu_b0: cpu@100 { @@ -141,6 +157,7 @@ enable-method = "psci"; #cooling-cells = <2>; /* min followed by max */ clocks = <&cru ARMCLKB>; + cpu-idle-states = <&cpu_sleep>; }; cpu_b1: cpu@101 { @@ -149,6 +166,7 @@ reg = <0x0 0x101>; enable-method = "psci"; clocks = <&cru ARMCLKB>; + cpu-idle-states = <&cpu_sleep>; }; }; -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
