linux-kernel - Re: [PATCH 1/2] dt-bindings: display: panel: Add ilitek ili9341 panel bindings

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Date:   Sun, 18 Jul 2021 02:16:53 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     dillon min <dillon.minfei@...il.com>
Cc:     "thierry.reding@...il.com" <thierry.reding@...il.com>,
        Sam Ravnborg <sam@...nborg.org>,
        Dave Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Noralf Trønnes <noralf@...nnes.org>,
        Doug Anderson <dianders@...omium.org>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        "open list:DRM PANEL DRIVERS" <dri-devel@...ts.freedesktop.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] dt-bindings: display: panel: Add ilitek ili9341 panel bindings

Hi Dillon,

thanks for your patch!

On Fri, Jul 16, 2021 at 12:20 PM <dillon.minfei@...il.com> wrote:

> From: Dillon Min <dillon.minfei@...il.com>
>
> Add documentation for "ilitek,ili9341" panel.
>
> Signed-off-by: Dillon Min <dillon.minfei@...il.com>

> +  dc-gpios:
> +    maxItems: 1
> +    description: Display data/command selection (D/CX)

This is a DBI feature so mention in the description that this is a
DBI panel.

> +  spi-3wire: true
> +
> +  spi-max-frequency:
> +    const: 10000000
> +
> +  port: true
> +
> +additionalProperties: false

Please add regulator supplies for the power lines, it's fine
not to implement code handling them in the driver but they
should be in the bindings.

For the ili9341 it should be

  vci-supply:
    description: Analog voltage supply (2.5 .. 3.3V)

  vddi-supply:
    description: Voltage supply for interface logic (1.65 .. 3.3 V)

  vddi-led-supply:
    description: Voltage supply for the LED driver (1.65 .. 3.3 V)

Yours,
Linus Walleij