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SubjectRe: [PATCH 4/5] ARC: AXS103: DTS: Set cpu frequency explicitly via dts
Date
On Tue, 2017-08-22 at 14:40 -0700, Vineet Gupta wrote:
> 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 !

Actually no.
If cpu 0 node don't have "cpu-freq" property we simply print cpu
frequency and don't try to change it.
So we can left other dts untouched.

> >
> > 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>;
>
>
--
 Eugeniy Paltsev
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