linux-kernel - Re: [PATCH v2 8/8] dt-bindings: phy: qcom,qmp: Mark 'vdda-pll-supply' & 'vdda-phy-supply' as optional

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Date:   Tue, 1 Mar 2022 11:39:13 +0800
From:   Shawn Guo <shawn.guo@...aro.org>
To:     Bhupesh Sharma <bhupesh.sharma@...aro.org>
Cc:     linux-arm-msm@...r.kernel.org, bhupesh.linux@...il.com,
        agross@...nel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, vkoul@...nel.org,
        linux-phy@...ts.infradead.org, robh+dt@...nel.org,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Rob Herring <robh@...nel.org>
Subject: Re: [PATCH v2 8/8] dt-bindings: phy: qcom,qmp: Mark
 'vdda-pll-supply' & 'vdda-phy-supply' as optional

On Mon, Feb 28, 2022 at 06:00:19PM +0530, Bhupesh Sharma wrote:
> Fix the following 'make dtbs_check' warnings, by marking the
> 'vdda-pll-supply' & 'vdda-phy-supply' properties as 'optional' in
> 'qcom,qmp-phy' dt-binding:
> 
> arch/arm64/boot/dts/qcom/sm8350-sony-xperia-sagami-pdx215.dt.yaml:
>  phy-wrapper@...9000: 'vdda-phy-supply' is a required property
> 
> arch/arm64/boot/dts/qcom/sm8350-sony-xperia-sagami-pdx215.dt.yaml:
>  phy-wrapper@...9000: 'vdda-pll-supply' is a required property
> 
> Cc: Bjorn Andersson <bjorn.andersson@...aro.org>
> Cc: Rob Herring <robh@...nel.org>
> Signed-off-by: Bhupesh Sharma <bhupesh.sharma@...aro.org>
> ---
>  Documentation/devicetree/bindings/phy/qcom,qmp-phy.yaml | 3 ---
>  1 file changed, 3 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/phy/qcom,qmp-phy.yaml b/Documentation/devicetree/bindings/phy/qcom,qmp-phy.yaml
> index f8a43acd229a..82b102b7d42c 100644
> --- a/Documentation/devicetree/bindings/phy/qcom,qmp-phy.yaml
> +++ b/Documentation/devicetree/bindings/phy/qcom,qmp-phy.yaml
> @@ -436,9 +436,6 @@ allOf:
>            items:
>              - const: phy
>              - const: common
> -      required:
> -        - vdda-phy-supply
> -        - vdda-pll-supply

Not sure this change is correct.  In phy-qcom-qmp driver, sm8350_usb3phy_cfg
has qmp_phy_vreg_l assignment.

static const char * const qmp_phy_vreg_l[] = {
        "vdda-phy", "vdda-pll",
};

static const struct qmp_phy_cfg sm8350_usb3phy_cfg = { 
        .vreg_list              = qmp_phy_vreg_l,
        .num_vregs              = ARRAY_SIZE(qmp_phy_vreg_l),
};

That means for "qcom,sm8350-qmp-usb3-phy" device, these two supplied are
required.  The sony-xperia-sagami-pdx215 may work only because
devm_regulator_bulk_get() call in qcom_qmp_phy_vreg_init() doesn't fail
because of dummy regulator support.

Shawn

>    - if:
>        properties:
>          compatible:
> -- 
> 2.35.1
>