Re: [PATCH 1/3] dt-bindings: display: rockchip: document VOP gamma LUT address

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On Thu, 2019-06-20 at 09:43 -0700, Doug Anderson wrote:
> Hi,
> 
> On Tue, Jun 18, 2019 at 2:43 PM Ezequiel Garcia <ezequiel@xxxxxxxxxxxxx> wrote:
> > Add the register specifier description for an
> > optional gamma LUT address.
> > 
> > Signed-off-by: Ezequiel Garcia <ezequiel@xxxxxxxxxxxxx>
> > ---
> >  .../bindings/display/rockchip/rockchip-vop.txt         | 10 +++++++++-
> >  1 file changed, 9 insertions(+), 1 deletion(-)
> > 
> > diff --git a/Documentation/devicetree/bindings/display/rockchip/rockchip-vop.txt b/Documentation/devicetree/bindings/display/rockchip/rockchip-
> > vop.txt
> > index 4f58c5a2d195..97ad78cc7e03 100644
> > --- a/Documentation/devicetree/bindings/display/rockchip/rockchip-vop.txt
> > +++ b/Documentation/devicetree/bindings/display/rockchip/rockchip-vop.txt
> > @@ -20,6 +20,13 @@ Required properties:
> >                 "rockchip,rk3228-vop";
> >                 "rockchip,rk3328-vop";
> > 
> > +- reg: Must contain one entry corresponding to the base address and length
> > +       of the register space. Can optionally contain a second entry
> > +       corresponding to the CRTC gamma LUT address.
> > +
> > +- reg-names: "base" for the base register space. If present, the CRTC
> > +       gamma LUT name should be "lut".
> 
> As per Rob Herring, current suggestion is to avoid reg-names when
> possible.  The code should just look for the presence of a 2nd entry
> and assume that if it's there that it's the lut range.  Full context:
> 
> > https://lore.kernel.org/lkml/CAL_Jsq+MMunmVWqeW9v2RyzsMKP+=kMzeTHNMG4JDHM7Fy0HBg@xxxxxxxxxxxxxx/
> 

Oh, that's news to me. I was assuming having reg-names was preferred.

Thanks for the feedback, I'll send a new version.

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