Re: [PATCH V3 2/3] dt-bindings: Add Logic PD Type 28 display panel

[Rob Herring]

On Wed, Sep 25, 2019 at 01:42:37PM -0500, Adam Ford wrote:
> This patch adds documentation of device tree bindings for the WVGA panel
> Logic PD Type 28 display.
> 
> Signed-off-by: Adam Ford <aford173@xxxxxxxxx>
> ---
> V3:  Correct build errors from 'make dt_binding_check'
> V2:  Use YAML instead of TXT for binding
> 
> diff --git a/Documentation/devicetree/bindings/display/panel/logicpd,type28.yaml b/Documentation/devicetree/bindings/display/panel/logicpd,type28.yaml
> new file mode 100644
> index 000000000000..74ba650ea7a0
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/panel/logicpd,type28.yaml
> @@ -0,0 +1,31 @@
> +# SPDX-License-Identifier: (GPL-2.0+ OR X11)

(GPL-2.0-only OR BSD-2-Clause) please.

X11 is pretty much never right unless this is copyright X Consortium.

> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/display/panel/logicpd,type28.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Logic PD Type 28 4.3" WQVGA TFT LCD panel
> +
> +maintainers:
> +  - Adam Ford <aford173@xxxxxxxxx>
> +

You need:

allOf:
  - $ref: panel-common.yaml#

> +properties:
> +  compatible:
> +    const: logicpd,type28
> +

> +  power-supply:
> +    description: Regulator to provide the supply voltage
> +    maxItems: 1
> +
> +  enable-gpios:
> +    description: GPIO pin to enable or disable the panel
> +    maxItems: 1
> +
> +  backlight:
> +    description: Backlight used by the panel
> +    $ref: "/schemas/types.yaml#/definitions/phandle"

These 3 are all defined in the common schema, so you just need 'true' 
for the value to indicate they apply to this panel and to make 
'additionalProperties: false' happy.

> +
> +required:
> +  - compatible

Are the rest really optional? 

> +
> +additionalProperties: false
> -- 
> 2.17.1
>