Commit df0a9e8d authored by Noralf Trønnes's avatar Noralf Trønnes
Browse files

dt-bindings: display: sitronix, st7735r: Remove spi-max-frequency limit 



The datasheet lists the minimum Serial clock cycle (Write) as 66ns which is
15MHz. Mostly it can do much better than that and is in fact often run at
32MHz. With a clever driver that runs configuration commands at a low speed
and only the pixel data at the maximum speed the configuration can't be
messed up by transfer errors and the speed is only limited by the amount of
pixel glitches that one is able to tolerate.

Signed-off-by: default avatarNoralf Trønnes <noralf@tronnes.org>
Acked-by: default avatarRob Herring <robh@kernel.org>
Acked-by: default avatarDavid Lechner <david@lechnology.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211124150757.17929-4-noralf@tronnes.org
parent a2e8cbb2

Documentation/devicetree/bindings/display/sitronix,st7735r.yaml

+1 −3
Original line number Diff line number Diff line
@@ -32,15 +32,13 @@ properties: 
              - okaya,rh128128t

          - const: sitronix,st7715r



  spi-max-frequency:

    maximum: 32000000



  dc-gpios:

    maxItems: 1

    description: Display data/command selection (D/CX)



  backlight: true

  reg: true

  spi-max-frequency: true

  reset-gpios: true

  rotation: true