[PATCH v2 14/14] ARM64: dts: Define CPU power domain for MSM8916
Lina Iyer
lina.iyer at linaro.org
Mon Aug 1 07:53:03 PDT 2016
On Fri, Jul 29 2016 at 15:57 -0600, Lina Iyer wrote:
>Define power domain and the power states for the domain as defined by
>the PSCI firmware. The 8916 firmware supports OS initiated method of
>powering off the CPU clusters.
>
>Cc: <devicetree at vger.kernel.org>
>Signed-off-by: Lina Iyer <lina.iyer at linaro.org>
>---
> arch/arm64/boot/dts/qcom/msm8916.dtsi | 27 +++++++++++++++++++++++++++
> 1 file changed, 27 insertions(+)
>
>diff --git a/arch/arm64/boot/dts/qcom/msm8916.dtsi b/arch/arm64/boot/dts/qcom/msm8916.dtsi
>index 3029773..d122fa1 100644
>--- a/arch/arm64/boot/dts/qcom/msm8916.dtsi
>+++ b/arch/arm64/boot/dts/qcom/msm8916.dtsi
>@@ -64,6 +64,7 @@
> next-level-cache = <&L2_0>;
> enable-method = "psci";
> cpu-idle-states = <&CPU_SPC>;
>+ power-domains = <&CPU_PD>;
> };
>
> CPU1: cpu at 1 {
>@@ -73,6 +74,7 @@
> next-level-cache = <&L2_0>;
> enable-method = "psci";
> cpu-idle-states = <&CPU_SPC>;
>+ power-domains = <&CPU_PD>;
> };
>
> CPU2: cpu at 2 {
>@@ -82,6 +84,7 @@
> next-level-cache = <&L2_0>;
> enable-method = "psci";
> cpu-idle-states = <&CPU_SPC>;
>+ power-domains = <&CPU_PD>;
> };
>
> CPU3: cpu at 3 {
>@@ -91,6 +94,7 @@
> next-level-cache = <&L2_0>;
> enable-method = "psci";
> cpu-idle-states = <&CPU_SPC>;
>+ power-domains = <&CPU_PD>;
> };
>
> L2_0: l2-cache {
>@@ -110,6 +114,29 @@
> };
> };
>
>+ CPU_PD: cpu-pd at 0 {
>+ #power-domain-cells = <0>;
>+ domain-idle-states = <&CLUSTER_RET>, <&CLUSTER_PWR_DWN>;
>+ };
>+
>+ cpu-domain-states {
I think, these state nodes should be a child of the psci node.
Mark, do you think, that makes sense?
-- Lina
>+ CLUSTER_RET: domain_ret {
>+ compatible = "arm,idle-state";
>+ arm,psci-suspend-param = <0x1000010>;
>+ entry-latency-us = <500>;
>+ exit-latency-us = <500>;
>+ residency-us = <2000>;
>+ };
>+
>+ CLUSTER_PWR_DWN: domain_gdhs {
>+ compatible = "arm,idle-state";
>+ arm,psci-suspend-param = <0x1000030>;
>+ entry-latency-us = <2000>;
>+ exit-latency-us = <2000>;
>+ residency-us = <6000>;
>+ };
>+ };
>+
> psci {
> compatible = "arm,psci-1.0";
> method = "smc";
>--
>2.7.4
>
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