linux-kernel - Re: [PATCH v2 0/3] Add missing vdd-supply for QUSB2 PHY

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Date:   Mon, 4 Oct 2021 11:01:29 +0800
From:   Shawn Guo <shawn.guo@...aro.org>
To:     Vinod Koul <vkoul@...nel.org>
Cc:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...ainline.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Jeffrey Hugo <jeffrey.l.hugo@...il.com>,
        Jami Kettunen <jamipkettunen@...il.com>,
        linux-phy@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 0/3] Add missing vdd-supply for QUSB2 PHY

Hi Vinod,

On Fri, Oct 01, 2021 at 01:46:23PM +0530, Vinod Koul wrote:
> Hi Shawn,
> 
> On 28-09-21, 10:19, Shawn Guo wrote:
> > The series adds missing vdd-supply for QUSB2 PHY which is required for
> > digital circuit.  The driver works right now likely because firmware
> > already sets it up.  Add it to bindings, driver and DTS that miss the
> > supply.
> > 
> > It should not cause problem for existing DTBs:
> > - SC7180, SDM630, SDM845 based platforms already specified vdd-supply
> >   in the DTBs.
> > - MSM8996 and MSM8998 platform DTBs miss vdd-supply, but dummy regulator
> >   will ensure QUSB2 PHY driver works as before on these platforms.
> 
> What about the rest.. I checked SM8350 and SM8250 mtp ones are missing
> this. With the property made mandatory, I guess it would cause these to
> fail right..

>From what I can see, SM8350 and SM8250 use qcom-snps-femto-v2 PHY
rather than qcom-qusb2.  So they should not be affected by this series.

Shawn