linux-kernel - Re: [PATCH 1/2] arm64: dts: sc7180: Support Lazor/Limozeen rev9

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Date:   Thu, 28 Oct 2021 16:00:32 -0700
From:   Stephen Boyd <swboyd@...omium.org>
To:     LKML <linux-kernel@...r.kernel.org>,
        Philip Chen <philipchen@...omium.org>
Cc:     dianders@...omium.org, Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
        linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH 1/2] arm64: dts: sc7180: Support Lazor/Limozeen rev9

Quoting Philip Chen (2021-10-28 15:11:31)
> diff --git a/arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor.dtsi b/arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor.dtsi
> index 8b79fbb75756..69666f92176a 100644
> --- a/arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor.dtsi
> @@ -5,13 +5,10 @@
>   * Copyright 2020 Google LLC.
>   */
>
> -#include "sc7180.dtsi"
> -
>  ap_ec_spi: &spi6 {};
>  ap_h1_spi: &spi0 {};

Can we get rid of this node swap now? I think it is only around because
early on we swapped the EC and H1 spi interfaces and then we had to swap
it every time we made a new board.

$ git grep ap_ec_spi
arch/arm64/boot/dts/qcom/sc7180-trogdor-coachz.dtsi:ap_ec_spi: &spi6 {};
arch/arm64/boot/dts/qcom/sc7180-trogdor-lazor.dtsi:ap_ec_spi: &spi6 {};
arch/arm64/boot/dts/qcom/sc7180-trogdor-pompom.dtsi:ap_ec_spi: &spi6 {};
arch/arm64/boot/dts/qcom/sc7180-trogdor-r1.dts:ap_ec_spi: &spi6 {};

It feels like we'd be better off leaving that quirk in trogdor-r0, which
conveniently isn't upstream, and then relabel the spi nodes in
sc7180-trogdor.dtsi now. Otherwise I look at this and have to remember
that whenever this dtsi file is included, we've already included the
sc7180.dtsi file before it, so that the relabel actually works.

>
>  #include "sc7180-trogdor.dtsi"
> -#include "sc7180-trogdor-ti-sn65dsi86.dtsi"
>
>  &ap_sar_sensor {
>         semtech,cs0-ground;