[PATCH v2 2/6] dt-bindings: display: st7789v: bound the number of Rx data lines
Maxime Ripard
maxime at cerno.tech
Sun Jun 18 14:37:58 UTC 2023
Hi,
On Fri, Jun 16, 2023 at 06:32:51PM +0200, Miquel Raynal wrote:
> The ST7789V LCD controller supports regular SPI wiring, as well as no Rx
> data line at all. The operating system needs to know whether it can read
> registers from the device or not. Let's detail this specific design
> possibility by bounding the spi-rx-bus-width property.
>
> Signed-off-by: Miquel Raynal <miquel.raynal at bootlin.com>
> ---
> .../devicetree/bindings/display/panel/sitronix,st7789v.yaml | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/display/panel/sitronix,st7789v.yaml b/Documentation/devicetree/bindings/display/panel/sitronix,st7789v.yaml
> index 0ccf0487fd8e..a25df7e1df88 100644
> --- a/Documentation/devicetree/bindings/display/panel/sitronix,st7789v.yaml
> +++ b/Documentation/devicetree/bindings/display/panel/sitronix,st7789v.yaml
> @@ -29,6 +29,10 @@ properties:
> spi-cpha: true
> spi-cpol: true
>
> + spi-rx-bus-width:
> + minimum: 0
> + maximum: 1
> +
It's not clear to me what the default would be?
Maxime
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