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SubjectRe: [PATCH 4/4] arm64: dts: qcom: msm8916: Add CPU frequency scaling support
On Mon, Feb 5, 2018 at 8:16 PM, Georgi Djakov <georgi.djakov@linaro.org> wrote:
> Add a CPU OPP table to allow CPU frequency scaling on msm8916 platforms.
>
> Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>

For this series, please feel free to add my

Reviewed-by: Amit Kucheria <amit.kucheria@linaro.org>
Tested-by: Amit Kucheria <amit.kucheria@linaro.org>

It enables basic cpufreq on the DB410c in mainline after enabling
QCOM_APCS_IPC. I'll send out another patch to automatically select
this Kconfig option.

> ---
> arch/arm64/boot/dts/qcom/msm8916.dtsi | 26 ++++++++++++++++++++++++++
> 1 file changed, 26 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/qcom/msm8916.dtsi b/arch/arm64/boot/dts/qcom/msm8916.dtsi
> index 4539571a36b2..e4682779eec7 100644
> --- a/arch/arm64/boot/dts/qcom/msm8916.dtsi
> +++ b/arch/arm64/boot/dts/qcom/msm8916.dtsi
> @@ -113,6 +113,8 @@
> next-level-cache = <&L2_0>;
> enable-method = "psci";
> cpu-idle-states = <&CPU_SPC>;
> + clocks = <&apcs 0>;
> + operating-points-v2 = <&cpu_opp_table>;
> };
>
> CPU1: cpu@1 {
> @@ -122,6 +124,8 @@
> next-level-cache = <&L2_0>;
> enable-method = "psci";
> cpu-idle-states = <&CPU_SPC>;
> + clocks = <&apcs 0>;
> + operating-points-v2 = <&cpu_opp_table>;
> };
>
> CPU2: cpu@2 {
> @@ -131,6 +135,8 @@
> next-level-cache = <&L2_0>;
> enable-method = "psci";
> cpu-idle-states = <&CPU_SPC>;
> + clocks = <&apcs 0>;
> + operating-points-v2 = <&cpu_opp_table>;
> };
>
> CPU3: cpu@3 {
> @@ -140,6 +146,8 @@
> next-level-cache = <&L2_0>;
> enable-method = "psci";
> cpu-idle-states = <&CPU_SPC>;
> + clocks = <&apcs 0>;
> + operating-points-v2 = <&cpu_opp_table>;
> };
>
> L2_0: l2-cache {
> @@ -212,6 +220,24 @@
>
> };
>
> + cpu_opp_table: cpu_opp_table {
> + compatible = "operating-points-v2";
> + opp-shared;
> +
> + opp-200000000 {
> + opp-hz = /bits/ 64 <200000000>;
> + };
> + opp-400000000 {
> + opp-hz = /bits/ 64 <400000000>;
> + };
> + opp-800000000 {
> + opp-hz = /bits/ 64 <800000000>;
> + };
> + opp-998400000 {
> + opp-hz = /bits/ 64 <998400000>;
> + };
> + };
> +
> gpu_opp_table: opp_table {
> compatible = "operating-points-v2";
>

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