linux-kernel - Re: [PATCH] media: dt-bindings: Convert Omnivision OV7251 to DT schema

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Message-ID: <CAL_Jsq+5mtgCAfFZOZTUjqFLW0DM5A6exD+PbznO71A8SDyyTA@mail.gmail.com>
Date:   Mon, 10 Jul 2023 12:03:38 -0600
From:   Rob Herring <robh@...nel.org>
To:     Conor Dooley <conor@...nel.org>
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Todor Tomov <todor.too@...il.com>, linux-media@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] media: dt-bindings: Convert Omnivision OV7251 to DT schema

On Mon, Jul 10, 2023 at 11:57 AM Conor Dooley <conor@...nel.org> wrote:
>
> On Fri, Jul 07, 2023 at 03:06:46PM -0600, Rob Herring wrote:
> > Convert the OmniVision OV7251 Image Sensor binding to DT schema format.
> >
> > vddd-supply was listed as required, but the example and actual user
> > don't have it. Also, the data brief says it has an internal regulator,
> > so perhaps it is truly optional.
>
> ov7251.c:
>         ov7251->core_regulator = devm_regulator_get(dev, "vddd");
>         if (IS_ERR(ov7251->core_regulator)) {
>                 dev_err(dev, "cannot get core regulator\n");
>                 return PTR_ERR(ov7251->core_regulator);
>         }
>
> Looks like the driver's probe function disagrees?

Doesn't the regulator framework return a dummy regulator if missing?

> I was going to ask how it worked, but the one user has
> status = "disabled"...

Saw that too, but figured there's some other include with that
overridden. We should really add a built .dts output target to avoid
trying to manually walk includes.


> /shrug, what's here looks fine to me, whatever Qualcomm person cares
> about the driver can make sure it works for them I guess.
>
> Reviewed-by: Conor Dooley <conor.dooley@...rochip.com>

Thanks.

Rob