Re: [PATCH 24/26] arm64: dts: qcom: sa8775p-ride: enable the SerDes PHY

Bjorn Andersson
2023-06-14T14:47:39Z

On Tue, Jun 13, 2023 at 09:02:23PM +0200, Konrad Dybcio wrote:
>
>
> On 12.06.2023 11:23, Bartosz Golaszewski wrote:
> > From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
> >
> > Enable the internal PHY on sa8775p-ride.
> >
> > Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
> > ---
> Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
>
> ---
>
> Bjorn, Krzysztof.. I was thinking whether we should even be disabling
> such hardware by default..
>

I'm in favor of keeping the configuration as generic/common/simple as
possible. So I like your suggestion.

Regards,
Bjorn

> Things that reside on the SoC and have no external dependencies could
> be left enabled:
>
> pros:
> - less fluff
> - we'd probably very quickly fix the missing PM calls
> - possibly less fw_devlink woes if we fail to get rid of references to
> the disabled component?
>
> cons:
> - boot times
> - slightly more memory usage
>
> Konrad
> > arch/arm64/boot/dts/qcom/sa8775p-ride.dts | 4 ++++
> > 1 file changed, 4 insertions(+)
> >
> > diff --git a/arch/arm64/boot/dts/qcom/sa8775p-ride.dts b/arch/arm64/boot/dts/qcom/sa8775p-ride.dts
> > index ab767cfa51ff..7754788ea775 100644
> > --- a/arch/arm64/boot/dts/qcom/sa8775p-ride.dts
> > +++ b/arch/arm64/boot/dts/qcom/sa8775p-ride.dts
> > @@ -355,6 +355,10 @@ &qupv3_id_2 {
> > status = "okay";
> > };
> >
> > +&serdes_phy {
> > + status = "okay";
> > +};
> > +
> > &sleep_clk {
> > clock-frequency = <32764>;
> > };