Re: [PATCH v2 1/2] dt-bindings: one binding file for all simple panels

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On Thu, Jan 2, 2020 at 4:17 AM Sam Ravnborg <sam@xxxxxxxxxxxx> wrote:
>
> There is an increasing number of new simple panels.
> Common for many of these simple panels are that they have one
> mandatory power-supply and some of them have backlight and / or
> an enable gpio.
>
> The binding file to describe these panels adds overhead
> that really do not add value.
> The binding are known and there is nothing gained from a
> dedicated binding file nor for any dedicated example.
>
> The following patch introduces a single panel-simple.yaml
> and converts two ampire bindings over to the new file.
>
> The conversion - if applied will have following effects:
>
> - The maintainer for the individual file will change
>     There is no need for many different maintainers for a simple binding.
>     We have the same situation with the panel-simple driver in the kernel.
>
> - The license will change to (GPL-2.0-only OR BSD-2-Clause)
>     There is usually only a single line copied from the original
>     file, a line that is often copied from a datasheet.
>     This license change should be acceptable considered what little
>     is copied.
>     If the license change is not OK we can use a dedicated binding
>     file in these cases.
>
> This is a follow-up on Rob's big patch converting a lot of panel bindings
> to individual files:
>
> "dt-bindings: display: Convert a bunch of panels to DT schema"
> https://patchwork.ozlabs.org/patch/1197683/
>
> The objectives with one file for the relevant simple panels are:
> - Make it simpler to add bindings for simple panels
> - Keep the number of bindings file lower and thus easier to find a
>   relevant file to copy from when adding new panels.
> - Keep the binding documentation for simple panels more consistent
> - Make it simpler to add support for new panels
>
> v2:
>   - spelling fixes (imirkin via irc, Rob)
>   - updated description (Rob)
>   - list properires in alphabetical order
>   - added power-supply to example (Rob)
>   - updated title
>   - reworded changelog a little
>
> Signed-off-by: Sam Ravnborg <sam@xxxxxxxxxxxx>
> Cc: Thierry Reding <thierry.reding@xxxxxxxxx>
> Cc: Rob Herring <robh@xxxxxxxxxx>
> Cc: Maxime Ripard <mripard@xxxxxxxxxx>
> Cc: Yannick Fertre <yannick.fertre@xxxxxx>
> Cc: Mark Rutland <mark.rutland@xxxxxxx>
> Cc: Daniel Vetter <daniel@xxxxxxxx>
> Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
> Cc: devicetree@xxxxxxxxxxxxxxx
> ---
>  .../panel/ampire,am-480272h3tmqw-t01h.yaml    | 42 -------------
>  .../panel/ampire,am800480r3tmqwa1h.txt        |  7 ---
>  .../bindings/display/panel/panel-simple.yaml  | 59 +++++++++++++++++++
>  3 files changed, 59 insertions(+), 49 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/display/panel/ampire,am-480272h3tmqw-t01h.yaml
>  delete mode 100644 Documentation/devicetree/bindings/display/panel/ampire,am800480r3tmqwa1h.txt
>  create mode 100644 Documentation/devicetree/bindings/display/panel/panel-simple.yaml

Reviewed-by: Rob Herring <robh@xxxxxxxxxx>
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