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    Subject[PATCH] arm64: dts: lx2160a: add cpu idle support
    Date
    lx2160a supports pw20 which could help save more power during cpu is
    dile. It needs system firmware support via PSCI.

    Signed-off-by: Ran Wang <ran.wang_1@nxp.com>
    ---
    arch/arm64/boot/dts/freescale/fsl-lx2160a.dtsi | 25 ++++++++++++++++++++++++
    1 files changed, 25 insertions(+), 0 deletions(-)

    diff --git a/arch/arm64/boot/dts/freescale/fsl-lx2160a.dtsi b/arch/arm64/boot/dts/freescale/fsl-lx2160a.dtsi
    index fe87204..1e07155 100644
    --- a/arch/arm64/boot/dts/freescale/fsl-lx2160a.dtsi
    +++ b/arch/arm64/boot/dts/freescale/fsl-lx2160a.dtsi
    @@ -33,6 +33,7 @@
    i-cache-line-size = <64>;
    i-cache-sets = <192>;
    next-level-cache = <&cluster0_l2>;
    + cpu-idle-states = <&cpu_pw20>;
    };

    cpu@1 {
    @@ -48,6 +49,7 @@
    i-cache-line-size = <64>;
    i-cache-sets = <192>;
    next-level-cache = <&cluster0_l2>;
    + cpu-idle-states = <&cpu_pw20>;
    };

    cpu@100 {
    @@ -63,6 +65,7 @@
    i-cache-line-size = <64>;
    i-cache-sets = <192>;
    next-level-cache = <&cluster1_l2>;
    + cpu-idle-states = <&cpu_pw20>;
    };

    cpu@101 {
    @@ -78,6 +81,7 @@
    i-cache-line-size = <64>;
    i-cache-sets = <192>;
    next-level-cache = <&cluster1_l2>;
    + cpu-idle-states = <&cpu_pw20>;
    };

    cpu@200 {
    @@ -93,6 +97,7 @@
    i-cache-line-size = <64>;
    i-cache-sets = <192>;
    next-level-cache = <&cluster2_l2>;
    + cpu-idle-states = <&cpu_pw20>;
    };

    cpu@201 {
    @@ -108,6 +113,7 @@
    i-cache-line-size = <64>;
    i-cache-sets = <192>;
    next-level-cache = <&cluster2_l2>;
    + cpu-idle-states = <&cpu_pw20>;
    };

    cpu@300 {
    @@ -123,6 +129,7 @@
    i-cache-line-size = <64>;
    i-cache-sets = <192>;
    next-level-cache = <&cluster3_l2>;
    + cpu-idle-states = <&cpu_pw20>;
    };

    cpu@301 {
    @@ -138,6 +145,7 @@
    i-cache-line-size = <64>;
    i-cache-sets = <192>;
    next-level-cache = <&cluster3_l2>;
    + cpu-idle-states = <&cpu_pw20>;
    };

    cpu@400 {
    @@ -153,6 +161,7 @@
    i-cache-line-size = <64>;
    i-cache-sets = <192>;
    next-level-cache = <&cluster4_l2>;
    + cpu-idle-states = <&cpu_pw20>;
    };

    cpu@401 {
    @@ -168,6 +177,7 @@
    i-cache-line-size = <64>;
    i-cache-sets = <192>;
    next-level-cache = <&cluster4_l2>;
    + cpu-idle-states = <&cpu_pw20>;
    };

    cpu@500 {
    @@ -183,6 +193,7 @@
    i-cache-line-size = <64>;
    i-cache-sets = <192>;
    next-level-cache = <&cluster5_l2>;
    + cpu-idle-states = <&cpu_pw20>;
    };

    cpu@501 {
    @@ -198,6 +209,7 @@
    i-cache-line-size = <64>;
    i-cache-sets = <192>;
    next-level-cache = <&cluster5_l2>;
    + cpu-idle-states = <&cpu_pw20>;
    };

    cpu@600 {
    @@ -213,6 +225,7 @@
    i-cache-line-size = <64>;
    i-cache-sets = <192>;
    next-level-cache = <&cluster6_l2>;
    + cpu-idle-states = <&cpu_pw20>;
    };

    cpu@601 {
    @@ -228,6 +241,7 @@
    i-cache-line-size = <64>;
    i-cache-sets = <192>;
    next-level-cache = <&cluster6_l2>;
    + cpu-idle-states = <&cpu_pw20>;
    };

    cpu@700 {
    @@ -243,6 +257,7 @@
    i-cache-line-size = <64>;
    i-cache-sets = <192>;
    next-level-cache = <&cluster7_l2>;
    + cpu-idle-states = <&cpu_pw20>;
    };

    cpu@701 {
    @@ -258,6 +273,7 @@
    i-cache-line-size = <64>;
    i-cache-sets = <192>;
    next-level-cache = <&cluster7_l2>;
    + cpu-idle-states = <&cpu_pw20>;
    };

    cluster0_l2: l2-cache0 {
    @@ -323,6 +339,15 @@
    cache-sets = <1024>;
    cache-level = <2>;
    };
    +
    + cpu_pw20: cpu-pw20 {
    + compatible = "arm,idle-state";
    + idle-state-name = "PW20";
    + arm,psci-suspend-param = <0x0>;
    + entry-latency-us = <2000>;
    + exit-latency-us = <2000>;
    + min-residency-us = <6000>;
    + };
    };

    gic: interrupt-controller@6000000 {
    --
    1.7.1
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