[PATCH 12/13] arm64: dts: add Allwinner A64 SoC .dtsi

Maxime Ripard
2016-09-09T20:04:35Z

Hi,

On Thu, Sep 08, 2016 at 09:41:10AM +0100, Andre Przywara wrote:
> > + timer {
> > + compatible = "arm,armv8-timer";
> > + interrupts = <GIC_PPI 13
> > + (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>,
> > + <GIC_PPI 14
> > + (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>,
> > + <GIC_PPI 11
> > + (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>,
> > + <GIC_PPI 10
> > + (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>;
> > + };
>
> Can you add a PMU node here? Or shall I send a patch on top of it?
> It would be:
>
> pmu {
> compatible = "arm,cortex-a53-pmu", "arm,armv8-pmuv3";
> interrupts = <GIC_SPI 120 IRQ_TYPE_LEVEL_HIGH>,
> <GIC_SPI 121 IRQ_TYPE_LEVEL_HIGH>,
> <GIC_SPI 122 IRQ_TYPE_LEVEL_HIGH>,
> <GIC_SPI 123 IRQ_TYPE_LEVEL_HIGH>;
> interrupt-affinity = <&cpu0>,
> <&cpu1>,
> <&cpu2>,
> <&cpu3>;
> };
>
> This enables perf to use hardware counters (for cycles and instructions,
> for instance).
>
> > +
> > + clocks {
> > + #address-cells = <1>;
> > + #size-cells = <1>;
> > + ranges;
> > +
> > + osc24M: osc24M_clk {
> > + #clock-cells = <0>;
> > + compatible = "fixed-clock";
> > + clock-frequency = <24000000>;
> > + clock-output-names = "osc24M";
> > + };
> > +
> > + osc32k: osc32k_clk {
> > + #clock-cells = <0>;
> > + compatible = "fixed-clock";
> > + clock-frequency = <32768>;
> > + clock-output-names = "osc32k";
> > + };
> > + };
>
> Can you remove this "clocks" node and put the two subnodes directly onto
> the top level?
> I know that putting clocks into a subnode is quite wide spread, but it
> does not represent any hardware hierarchy, especially in this
> fixed-clock case.
> So if we can (and it is easy here!) we should avoid any clocks subnode.
>
> (Yes, I know that this was in my original DT as well, but Mark Rutland
> convinced me of this.)

I'll do those changes before sending the new version.

Maxime

--
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
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