linux-kernel - Re: [PATCH v1] arm64: dts: qcom: sc7280: Add device tree for herobrine villager

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Date:   Thu, 24 Mar 2022 15:11:55 -0700
From:   Matthias Kaehlcke <mka@...omium.org>
To:     Doug Anderson <dianders@...omium.org>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Stephen Boyd <swboyd@...omium.org>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>
Subject: Re: [PATCH v1] arm64: dts: qcom: sc7280: Add device tree for
 herobrine villager

On Thu, Mar 24, 2022 at 12:59:51PM -0700, Doug Anderson wrote:
> Hi,
> 
> On Thu, Mar 24, 2022 at 10:13 AM Matthias Kaehlcke <mka@...omium.org> wrote:
> >
> > Add a basic device tree for the herobrine villager board.
> >
> > Signed-off-by: Matthias Kaehlcke <mka@...omium.org>
> > ---
> >
> >  arch/arm64/boot/dts/qcom/Makefile             |   1 +
> >  .../dts/qcom/sc7280-herobrine-villager-r0.dts | 274 ++++++++++++++++++
> >  2 files changed, 275 insertions(+)
> 
> Question: how does this interact with the patch:
> 
> https://lore.kernel.org/r/20220316172814.v1.3.Iad21bd53f3ac14956b8dbbf3825fc7ab29abdf97@changeid/
> 
> Specifically, if that patch lands first don't you need to add a patch
> to turn on "pp3300_codec" ?

Right, I missed that. I'll add it in the next version, thanks!

> I was also looking at whether we should be enabling the wf_cam
> regulators for villager. I believe that answer is "no",

I agree to keep them disabled.

> but _also_ I believe that we should be _disabling_ the uf_cam
> regulators for villager, right?

it is not clear yo me which regulator you have in mind for the UF cam,
could you clarify?

> > +                         "MOS_LAA_AS_EN",              /* 90 */
> > +                         "SD_CD_ODL",
> 
> I was somewhat surprised that "SD_CD_ODL" was listed here since,
> diffing this with Herobrine, it appears that Villager doesn't have SD.
> I checked the schematics, though, and I can confirm that the GPIO is
> named this even if it just goes to a testpoint on the board. ;-) ...so
> I'm fine keeping it here.

:)