linux-kernel - Re: [PATCH v7 1/2] dt-bindings: display: bridge: Document THC63LVD1024 LVDS decoder

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Date:   Mon, 9 Apr 2018 11:22:44 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc:     jacopo mondi <jacopo@...ndi.org>,
        Jacopo Mondi <jacopo+renesas@...ndi.org>,
        architt@...eaurora.org, a.hajda@...sung.com, airlied@...ux.ie,
        vladimir_zapolskiy@...tor.com, horms@...ge.net.au,
        magnus.damm@...il.com, geert@...ux-m68k.org,
        niklas.soderlund@...natech.se, sergei.shtylyov@...entembedded.com,
        robh+dt@...nel.org, mark.rutland@....com,
        dri-devel@...ts.freedesktop.org, linux-renesas-soc@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v7 1/2] dt-bindings: display: bridge: Document
 THC63LVD1024 LVDS decoder

On Fri, Apr 06, 2018 at 06:40:14PM +0300, Laurent Pinchart wrote:
> On Friday, 6 April 2018 17:25:58 EEST jacopo mondi wrote:

> > Same on the mandatory/optional VCC supply thing. Let's try to make
> > next version the final one. If the optional property with the dummy
> > regulator doesn't satisfy you and it is preferred to have a fixed-regulator
> > anyhow in DT I'll do in next version, othewise let's try not to change
> > it again. I'll just remark here that in the current Eagle design vcc is
> > connected to a power rail with no regulator at all :)

> I don't like the dummy regulator much, as it generates a dev_warn(), which 
> makes me believe that it's a hack rather than a proper solution. You might 
> want to ask Mark Brown for his opinion.

The DT should describe the physical supplies the device needs, if that's
a fixed regulator with no software control then the DT should have a
fixed regulator with no software control.

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