linux-kernel - Re: [PATCH 1/2] dt-bindings: display: panel: Add bindings for the Sitronix ST7789V panel

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Message-ID: <20170207164258.GA28522@ulmo.ba.sec>
Date:   Tue, 7 Feb 2017 17:42:58 +0100
From:   Thierry Reding <thierry.reding@...il.com>
To:     Maxime Ripard <maxime.ripard@...e-electrons.com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        David Airlie <airlied@...ux.ie>,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] dt-bindings: display: panel: Add bindings for the
 Sitronix ST7789V panel

On Tue, Feb 07, 2017 at 04:44:42PM +0100, Maxime Ripard wrote:
> Hi Thierry,
> 
> On Mon, Feb 06, 2017 at 02:05:49PM +0100, Thierry Reding wrote:
> > On Fri, Feb 03, 2017 at 10:59:05AM +0100, Maxime Ripard wrote:
> > > The Sitronix ST7789V is an LCD panel controller, controlled over SPI, that
> > > can drive 18-bits 240x320 LCD displays.
> > > 
> > > Signed-off-by: Maxime Ripard <maxime.ripard@...e-electrons.com>
> > > ---
> > >  Documentation/devicetree/bindings/display/panel/sitronix,st7789v.txt | 36 ++++++++++++++++++++++++++++++++++++
> > >  1 file changed, 36 insertions(+), 0 deletions(-)
> > >  create mode 100644 Documentation/devicetree/bindings/display/panel/sitronix,st7789v.txt
> > > 
> > > diff --git a/Documentation/devicetree/bindings/display/panel/sitronix,st7789v.txt b/Documentation/devicetree/bindings/display/panel/sitronix,st7789v.txt
> > > new file mode 100644
> > > index 000000000000..f70e6e9c54ed
> > > --- /dev/null
> > > +++ b/Documentation/devicetree/bindings/display/panel/sitronix,st7789v.txt
> > > @@ -0,0 +1,36 @@
> > > +Sitronix ST7789V RGB panel with SPI control bus
> > > +
> > > +Required properties:
> > > +  - compatible: "sitronix,st7789v"
> > > +  - reg: Chip select of the panel on the SPI bus
> > > +  - reset-gpios: a GPIO phandle for the reset pin
> > 
> > Shouldn't this have some sort of power supply?
> 
> On the board I currently have, it's just tied to an always on
> regulator, but you're right, I'll add it.

Yes, we need to make sure to describe this from the panel's perspective
to make sure that when other board designers hook things up differently
we can still model it in DT.

But you already knew that...

Thierry

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