Re: [PATCH v1 7/7] arm64: dts: sdm845: wireup the thermal trip points to cpufreq
From: Viresh Kumar
Date: Thu Jan 10 2019 - 01:24:05 EST
On 09-01-19, 18:22, Matthias Kaehlcke wrote:
> Hi Amit,
>
> On Thu, Jan 10, 2019 at 05:30:56AM +0530, Amit Kucheria wrote:
> > Since the big and little cpus are in the same frequency domain, use all
> > of them for mitigation in the cooling-map. At the lower trip points we
> > restrict ourselves to throttling only a few OPPs. At higher trip
> > temperatures, allow ourselves to be throttled to any extent.
> >
> > Signed-off-by: Amit Kucheria <amit.kucheria@xxxxxxxxxx>
> > ---
> > arch/arm64/boot/dts/qcom/sdm845.dtsi | 145 +++++++++++++++++++++++++++
> > 1 file changed, 145 insertions(+)
> >
> > diff --git a/arch/arm64/boot/dts/qcom/sdm845.dtsi b/arch/arm64/boot/dts/qcom/sdm845.dtsi
> > index 29e823b0caf4..cd6402a9aa64 100644
> > --- a/arch/arm64/boot/dts/qcom/sdm845.dtsi
> > +++ b/arch/arm64/boot/dts/qcom/sdm845.dtsi
> > @@ -13,6 +13,7 @@
> > #include <dt-bindings/reset/qcom,sdm845-aoss.h>
> > #include <dt-bindings/soc/qcom,rpmh-rsc.h>
> > #include <dt-bindings/clock/qcom,gcc-sdm845.h>
> > +#include <dt-bindings/thermal/thermal.h>
> >
> > / {
> > interrupt-parent = <&intc>;
> > @@ -99,6 +100,7 @@
> > compatible = "qcom,kryo385";
> > reg = <0x0 0x0>;
> > enable-method = "psci";
> > + #cooling-cells = <2>;
> > next-level-cache = <&L2_0>;
> > L2_0: l2-cache {
> > compatible = "cache";
> > @@ -114,6 +116,7 @@
> > compatible = "qcom,kryo385";
> > reg = <0x0 0x100>;
> > enable-method = "psci";
> > + #cooling-cells = <2>;
>
> This is not needed (also applies to other for other non-policy
> cores). A single cpufreq device is created per frequency domain /
> cluster, hence a single cooling device is registered per cluster,
> which IMO makes sense given that the CPUs of a cluster can't change
> their frequencies independently.
> As per above, there are no cooling devices for CPU1-3 and CPU5-7.
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viresh