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Groups > linux.kernel > #1717863
| From | Vineet Gupta <Vineet.Gupta1@synopsys.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH 4/5] ARC: AXS103: DTS: Set cpu frequency explicitly via dts |
| Date | 2017-08-22 23:50 +0200 |
| Message-ID | <uhpdE-8bX-17@gated-at.bofh.it> (permalink) |
| References | <ueqfT-6mT-1@gated-at.bofh.it> <ueqfV-6mT-41@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On 08/14/2017 09:12 AM, Eugeniy Paltsev wrote:
> Set cpu frequency explicitly via "cpu-freq" param in cpu 0 node
> in device tree.
>
> We add "cpu-freq" only to cpu 0 as all cpus are clocking from same
> clock source (same pll in our case).
>
> We override cpus node in skeleton as we don't need this change for
> nsim.
Given that you added a generic feature as part of 1/5 - do other platforms
abilis/nps need corresponding fixups as this one !
>
> Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
> ---
> arch/arc/boot/dts/axc003.dtsi | 13 +++++++++++++
> arch/arc/boot/dts/axc003_idu.dtsi | 35 +++++++++++++++++++++++++++++++++++
> 2 files changed, 48 insertions(+)
>
> diff --git a/arch/arc/boot/dts/axc003.dtsi b/arch/arc/boot/dts/axc003.dtsi
> index dca7e39..7c7411c 100644
> --- a/arch/arc/boot/dts/axc003.dtsi
> +++ b/arch/arc/boot/dts/axc003.dtsi
> @@ -17,6 +17,19 @@
> #address-cells = <2>;
> #size-cells = <2>;
>
> + cpus {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + cpu@0 {
> + device_type = "cpu";
> + compatible = "snps,archs38";
> + reg = <0>;
> + cpu-freq = <100000000>;
> + clocks = <&core_clk>;
> + };
> + };
> +
> cpu_card {
> compatible = "simple-bus";
> #address-cells = <1>;
> diff --git a/arch/arc/boot/dts/axc003_idu.dtsi b/arch/arc/boot/dts/axc003_idu.dtsi
> index 5b56bef..44bc01e 100644
> --- a/arch/arc/boot/dts/axc003_idu.dtsi
> +++ b/arch/arc/boot/dts/axc003_idu.dtsi
> @@ -17,6 +17,41 @@
> #address-cells = <2>;
> #size-cells = <2>;
>
> + cpus {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + /*
> + * "cpu-freq" was added only to cpu 0 as all cpus are clocking
> + * from same clock source (same pll (core_clk) in our case).
> + */
> + cpu@0 {
> + device_type = "cpu";
> + compatible = "snps,archs38";
> + reg = <0>;
> + cpu-freq = <100000000>;
> + clocks = <&core_clk>;
> + };
> + cpu@1 {
> + device_type = "cpu";
> + compatible = "snps,archs38";
> + reg = <1>;
> + clocks = <&core_clk>;
> + };
> + cpu@2 {
> + device_type = "cpu";
> + compatible = "snps,archs38";
> + reg = <2>;
> + clocks = <&core_clk>;
> + };
> + cpu@3 {
> + device_type = "cpu";
> + compatible = "snps,archs38";
> + reg = <3>;
> + clocks = <&core_clk>;
> + };
> + };
> +
> cpu_card {
> compatible = "simple-bus";
> #address-cells = <1>;
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[PATCH 0/5] Updates to arc clock tree managment Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> - 2017-08-14 18:20 +0200
[PATCH 2/5] ARC: AXS103: Get rid of platform specific cpu clock configuration Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> - 2017-08-14 18:20 +0200
Re: [PATCH 2/5] ARC: AXS103: Get rid of platform specific cpu clock configuration Vineet Gupta <Vineet.Gupta1@synopsys.com> - 2017-08-22 22:40 +0200
[PATCH 1/5] ARC: set and print cpu frequency at boot time Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> - 2017-08-14 18:20 +0200
[PATCH 3/5] ARC: AXS103: DTS: Add core pll node to manage cpu frequency Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> - 2017-08-14 18:20 +0200
Re: [PATCH 3/5] ARC: AXS103: DTS: Add core pll node to manage cpu frequency Vineet Gupta <Vineet.Gupta1@synopsys.com> - 2017-08-22 22:50 +0200
Re: [PATCH 3/5] ARC: AXS103: DTS: Add core pll node to manage cpu frequency Vineet Gupta <Vineet.Gupta1@synopsys.com> - 2017-08-22 22:50 +0200
Re: [PATCH 3/5] ARC: AXS103: DTS: Add core pll node to manage cpu frequency Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> - 2017-08-23 14:20 +0200
[PATCH 4/5] ARC: AXS103: DTS: Set cpu frequency explicitly via dts Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> - 2017-08-14 18:20 +0200
Re: [PATCH 4/5] ARC: AXS103: DTS: Set cpu frequency explicitly via dts Vineet Gupta <Vineet.Gupta1@synopsys.com> - 2017-08-22 23:50 +0200
Re: [PATCH 4/5] ARC: AXS103: DTS: Set cpu frequency explicitly via dts Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> - 2017-08-23 13:30 +0200
Re: [PATCH 4/5] ARC: AXS103: DTS: Set cpu frequency explicitly via dts Vineet Gupta <Vineet.Gupta1@synopsys.com> - 2017-08-23 18:50 +0200
[PATCH 5/5] ARC: AXS103: use cpu-freq param instead of /cpu_card/core_clk Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> - 2017-08-14 18:20 +0200
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