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| author |   Noralf Trønnes <noralf@tronnes.org> | 2021-11-24 16:07:54 +0100 |
|---|---|---|
| committer | Noralf Trønnes <noralf@tronnes.org> | 2022-03-09 10:28:37 +0000 |
| commit | df0a9e8d3008050f61241f471c70438ef1e90a1b (patch) | |
| tree | e1d8f87b1f6ca0d6bd2cfbe99419ab2a39827e18 /Documentation/devicetree/bindings/display/sitronix,st7735r.yaml | |
| parent | dt-bindings: display: sitronix, st7735r: Make reset-gpios optional (diff) | |
| download | linux-dev-df0a9e8d3008050f61241f471c70438ef1e90a1b.tar.xz linux-dev-df0a9e8d3008050f61241f471c70438ef1e90a1b.zip | |
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: Noralf Trønnes <noralf@tronnes.org>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: David Lechner <david@lechnology.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211124150757.17929-4-noralf@tronnes.org
Diffstat (limited to 'Documentation/devicetree/bindings/display/sitronix,st7735r.yaml')
| -rw-r--r-- | Documentation/devicetree/bindings/display/sitronix,st7735r.yaml | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/Documentation/devicetree/bindings/display/sitronix,st7735r.yaml b/Documentation/devicetree/bindings/display/sitronix,st7735r.yaml index f81d0d0d51fe..157b1a7b18f9 100644 --- a/Documentation/devicetree/bindings/display/sitronix,st7735r.yaml +++ b/Documentation/devicetree/bindings/display/sitronix,st7735r.yaml @@ -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 |