[PATCH v2 2/6] dt-bindings: display: st7789v: bound the number of Rx data lines

[Krzysztof Kozlowski]

On 16/06/2023 18:32, 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

0 is already minimum, but I understand you want to emphasize lack of RX.

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski at linaro.org>

Best regards,
Krzysztof