On Tue, Mar 31, 2015 at 04:24:37AM +0100, Howard Chen wrote:
> add an idle-states node to describe the mt8173 cpu idle
> add a reference to the idle-states node in each CPU node
You are also changing the PSCI version in this patch, but
I think it is acceptable to have multiple changes at once
to avoid churning out dts changes.
Commit log should be rewritten, lack of punctuation,
missing capitalization, etc; in short, please rewrite it.
> Signed-off-by: Howard Chen <howard.chen@xxxxxxxxxx>
> ---
> arch/arm64/boot/dts/mediatek/mt8173.dtsi | 30 ++++++++++++++++++++++++++----
> 1 file changed, 26 insertions(+), 4 deletions(-)
>
> diff --git a/arch/arm64/boot/dts/mediatek/mt8173.dtsi b/arch/arm64/boot/dts/mediatek/mt8173.dtsi
> index 8554ec3..96dff1e 100644
> --- a/arch/arm64/boot/dts/mediatek/mt8173.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt8173.dtsi
> @@ -48,6 +48,8 @@
> device_type = "cpu";
> compatible = "arm,cortex-a53";
> reg = <0x000>;
> + enable-method = "psci";
> + cpu-idle-states = <&CPU_SLEEP_0_0 &CLUSTER_SLEEP_0>;
You are free to use the labels you want, but you tell me why
CPU_SLEEP_0_0 is used where eg CPU_SLEEP_0 would be sufficient
and clearer (comment valid for all cpu nodes). Copy'n'paste ?
> };
>
> cpu1: cpu@1 {
> @@ -55,6 +57,7 @@
> compatible = "arm,cortex-a53";
> reg = <0x001>;
> enable-method = "psci";
> + cpu-idle-states = <&CPU_SLEEP_0_0 &CLUSTER_SLEEP_0>;
> };
>
> cpu2: cpu@100 {
> @@ -62,6 +65,7 @@
> compatible = "arm,cortex-a57";
> reg = <0x100>;
> enable-method = "psci";
> + cpu-idle-states = <&CPU_SLEEP_0_0 &CLUSTER_SLEEP_0>;
> };
>
> cpu3: cpu@101 {
> @@ -69,15 +73,33 @@
> compatible = "arm,cortex-a57";
> reg = <0x101>;
> enable-method = "psci";
> + cpu-idle-states = <&CPU_SLEEP_0_0 &CLUSTER_SLEEP_0>;
> };
> +
> + idle-states {
> + entry-method = "arm,psci-0.2";
"arm,psci"
> +
> + CPU_SLEEP_0_0: cpu-sleep-0-0 {
> + compatible = "arm,idle-state";
> + arm,psci-suspend-param = <0x0010000>;
> + entry-latency-us = <600>;
> + exit-latency-us = <600>;
> + min-residency-us = <1200>;
> + };
> +
> + CLUSTER_SLEEP_0: cluster-sleep-0 {
> + compatible = "arm,idle-state";
> + arm,psci-suspend-param = <0x1010000>;
> + entry-latency-us = <800>;
> + exit-latency-us = <1000>;
> + min-residency-us = <2000>;
> + wakeup-latency-us = <1000>;
> + };
You tested these latency values right ?
> };
>
> psci {
> - compatible = "arm,psci";
> + compatible = "arm,psci-0.2";
See my comment in the commit log, this change is independent of idle
states changes.
Thanks,
Lorenzo
> method = "smc";
> - cpu_suspend = <0x84000001>;
> - cpu_off = <0x84000002>;
> - cpu_on = <0x84000003>;
> };
>
> uart_clk: dummy26m {
> --
> 1.9.1
>
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