linux-kernel - Re: [PATCH 1/4] arm64: dts: qcom: sc8280xp: fix USB0 PHY PCS

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Date:   Mon, 17 Oct 2022 15:50:43 -0500
From:   Andrew Halaney <ahalaney@...hat.com>
To:     Johan Hovold <johan+linaro@...nel.org>
Cc:     Bjorn Andersson <andersson@...nel.org>,
        Andy Gross <agross@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/4] arm64: dts: qcom: sc8280xp: fix USB0 PHY PCS_MISC
 registers

Hi,

On Mon, Sep 19, 2022 at 11:44:51AM +0200, Johan Hovold wrote:
> The USB0 SS PHY node had the PCS_MISC register block (0x1200) replaced
> with PCS_USB (0x1700).
> 
> Fixes: 152d1faf1e2f ("arm64: dts: qcom: add SC8280XP platform")
> Signed-off-by: Johan Hovold <johan+linaro@...nel.org>

Reviewed-by: Andrew Halaney <ahalaney@...hat.com>

Thanks for the patch, I think this patch makes sense from what I'm
seeing of upstream's expectations (that register space should be
PCS_MISC's) downstream, register names, and offsets.

Being verbose because it took me a little bit to figure out, but here's
the offset and registers I found downstream which correlate to
your change:

    /* Module: USB3_PCS_MISC_USB3_PCS_MISC_USB3_PCS_MISC */
    #define USB3_PCS_MISC_TYPEC_CTRL				0x1200
    #define USB3_PCS_MISC_TYPEC_PWRDN_CTRL				0x1204
    #define USB3_PCS_MISC_PCS_MISC_CONFIG1				0x1208
    #define USB3_PCS_MISC_CLAMP_ENABLE				0x120C
    #define USB3_PCS_MISC_TYPEC_STATUS				0x1210
    #define USB3_PCS_MISC_PLACEHOLDER_STATUS			0x1214

Your description of the PCS_USB region accidentally being used in the
prior version also adds up with what I see.

Thanks,
Andrew

> ---
>  arch/arm64/boot/dts/qcom/sc8280xp.dtsi | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
> index 49ea8b5612fc..e8905445ca19 100644
> --- a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
> @@ -1184,7 +1184,7 @@ usb_0_ssphy: usb3-phy@...b400 {
>  				      <0 0x088ec400 0 0x1f0>,
>  				      <0 0x088eba00 0 0x100>,
>  				      <0 0x088ebc00 0 0x3ec>,
> -				      <0 0x088ec700 0 0x64>;
> +				      <0 0x088ec200 0 0x18>;
>  				#phy-cells = <0>;
>  				#clock-cells = <0>;
>  				clocks = <&gcc GCC_USB3_PRIM_PHY_PIPE_CLK>;
> -- 
> 2.35.1
>