[PATCH] dt-bindings: lcdif: Document the dmas/dma-names properties

[Marek Vasut]

On 9/3/24 6:27 PM, Fabio Estevam wrote:
> From: Fabio Estevam <festevam at denx.de>
> 
> i.MX28 has an RX DMA channel associated with the LCDIF controller.
> 
> Document the 'dmas' and 'dma-names' properties to fix the following
> dt-schema warnings:
> 
> lcdif at 80030000: 'dma-names', 'dmas' do not match any of the regexes: 'pinctrl-[0-9]+'
> 
> Signed-off-by: Fabio Estevam <festevam at denx.de>
> ---
>   .../bindings/display/fsl,lcdif.yaml           | 19 +++++++++++++++++++
>   1 file changed, 19 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/display/fsl,lcdif.yaml b/Documentation/devicetree/bindings/display/fsl,lcdif.yaml
> index 0681fc49aa1b..dd462abd61f8 100644
> --- a/Documentation/devicetree/bindings/display/fsl,lcdif.yaml
> +++ b/Documentation/devicetree/bindings/display/fsl,lcdif.yaml
> @@ -50,6 +50,14 @@ properties:
>         - const: disp_axi
>       minItems: 1
>   
> +  dmas:
> +    items:
> +      - description: DMA specifier for the RX DMA channel.
> +
> +  dma-names:
> +    items:
> +      - const: rx
> +
>     interrupts:
>       items:
>         - description: LCDIF DMA interrupt
> @@ -156,6 +164,17 @@ allOf:
>           interrupts:
>             maxItems: 1
>   
> +  - if:
> +      not:
> +        properties:
> +          compatible:
> +            contains:
> +              enum:
> +                - fsl,imx28-lcdif

This also applies to MX23 , that one also has the support for 
command-mode LCDs which are then driven by pumping commands via DMA. I 
don't think Linux actually supports this mode of operation, but I do 
recall using it some long time ago on MX23.