linux-kernel - Re: [PATCH v6 2/5] dt-bindings: media: max9286: Document 'maxim,reverse-channel-microvolt'

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Message-ID: <20201222085344.gb7nqhbenn65yaux@uno.localdomain>
Date:   Tue, 22 Dec 2020 09:53:44 +0100
From:   Jacopo Mondi <jacopo@...ndi.org>
To:     Rob Herring <robh@...nel.org>
Cc:     Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Jacopo Mondi <jacopo+renesas@...ndi.org>,
        kieran.bingham+renesas@...asonboard.com,
        laurent.pinchart+renesas@...asonboard.com,
        niklas.soderlund+renesas@...natech.se, geert@...ux-m68k.org,
        devicetree@...r.kernel.org, linux-media@...r.kernel.org,
        linux-renesas-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
        Hyun Kwon <hyunk@...inx.com>,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        sergei.shtylyov@...il.com
Subject: Re: [PATCH v6 2/5] dt-bindings: media: max9286: Document
 'maxim,reverse-channel-microvolt'

Hi Rob, Laurent,

On Mon, Dec 21, 2020 at 11:58:27AM -0700, Rob Herring wrote:
> On Wed, Dec 16, 2020 at 07:17:05PM +0200, Laurent Pinchart wrote:
> > > > @@ -221,6 +241,7 @@ required:
> > > >    - ports
> > > >    - i2c-mux
> > > >    - gpio-controller
> > > > +  - maxim,reverse-channel-microvolt
> >
> > One comment though: You specify a default value above, which isn't very
> > useful when the property is required. Should we either drop the default
> > value, or make the property optional ?
>
> And generally added properties can't be required unless for some reason
> DT's without the property are broken.

My thinking was to make it required for new DTS and specify a default
for the old ones that do not have the property. I'll drop required and
keep the default value in next version.

Thanks
  j

>
> With required dropped,
>
> Reviewed-by: Rob Herring <robh@...nel.org>
>
> Rob