Re: [PATCH V2 4/4] dt-bindings: gpu: Convert v3d to json-schema

[Maxime Ripard <maxime@cerno.tech>]

[-- Attachment #1: Type: text/plain, Size: 4051 bytes --]

On Wed, Dec 23, 2020 at 09:35:14PM +0100, Stefan Wahren wrote:
> This converts the v3d bindings to yaml format.
> 
> Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
> ---
>  .../devicetree/bindings/gpu/brcm,bcm-v3d.txt       | 33 ----------
>  .../devicetree/bindings/gpu/brcm,bcm-v3d.yaml      | 76 ++++++++++++++++++++++
>  2 files changed, 76 insertions(+), 33 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/gpu/brcm,bcm-v3d.txt
>  create mode 100644 Documentation/devicetree/bindings/gpu/brcm,bcm-v3d.yaml
> 
> diff --git a/Documentation/devicetree/bindings/gpu/brcm,bcm-v3d.txt b/Documentation/devicetree/bindings/gpu/brcm,bcm-v3d.txt
> deleted file mode 100644
> index b2df82b..0000000
> --- a/Documentation/devicetree/bindings/gpu/brcm,bcm-v3d.txt
> +++ /dev/null
> @@ -1,33 +0,0 @@
> -Broadcom V3D GPU
> -
> -Only the Broadcom V3D 3.x and newer GPUs are covered by this binding.
> -For V3D 2.x, see brcm,bcm-vc4.txt.
> -
> -Required properties:
> -- compatible:	Should be "brcm,7268-v3d" or "brcm,7278-v3d"
> -- reg:		Physical base addresses and lengths of the register areas
> -- reg-names:	Names for the register areas.  The "hub" and "core0"
> -		  register areas are always required.  The "gca" register area
> -		  is required if the GCA cache controller is present.  The
> -		  "bridge" register area is required if an external reset
> -		  controller is not present.
> -- interrupts:	The interrupt numbers.  The first interrupt is for the hub,
> -		  while the following interrupts are separate interrupt lines
> -		  for the cores (if they don't share the hub's interrupt).
> -		  See bindings/interrupt-controller/interrupts.txt
> -
> -Optional properties:
> -- clocks:	The core clock the unit runs on
> -- resets:	The reset line for v3d, if not using a mapping of the bridge
> -		  See bindings/reset/reset.txt
> -
> -v3d {
> -	compatible = "brcm,7268-v3d";
> -	reg = <0xf1204000 0x100>,
> -	      <0xf1200000 0x4000>,
> -	      <0xf1208000 0x4000>,
> -	      <0xf1204100 0x100>;
> -	reg-names = "bridge", "hub", "core0", "gca";
> -	interrupts = <0 78 4>,
> -		     <0 77 4>;
> -};
> diff --git a/Documentation/devicetree/bindings/gpu/brcm,bcm-v3d.yaml b/Documentation/devicetree/bindings/gpu/brcm,bcm-v3d.yaml
> new file mode 100644
> index 0000000..a2b06d42
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/gpu/brcm,bcm-v3d.yaml
> @@ -0,0 +1,76 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/gpu/brcm,bcm-v3d.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Broadcom V3D GPU Bindings
> +
> +maintainers:
> +  - Eric Anholt <eric@anholt.net>
> +  - Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
> +
> +properties:
> +  $nodename:
> +    pattern: '^gpu@[a-f0-9]+$'
> +
> +  compatible:
> +    enum:
> +      - brcm,7268-v3d
> +      - brcm,7278-v3d
> +
> +  reg:
> +    items:
> +      - description: hub register
> +      - description: core0 register
> +      - description: GCA cache controller register (if GCA controller)
> +      - description: bridge register (if no external reset controller)
> +    minItems: 2
> +    maxItems: 4
> +
> +  reg-names:
> +    items:
> +      enum: [ bridge, core0, gca, hub ]
> +    minItems: 2
> +    maxItems: 4

It's not really clear here what interrupts are expected. I assume that
bridge and core0 are always supposed to be here, but gca and hub are
optional?

It would be a bit cumbersome to get it to check properly, but we can at
least make it obvious in the binding with a comment or the description

> +
> +  interrupts:
> +    items:
> +      - description: hub interrupt
> +      - description: core interrupt (if it doesn't share the hub's interrupt)
> +    minItems: 1
> +    maxItems: 2
> +
> +  clocks:
> +    maxItems: 1
> +
> +  clock-names:
> +    maxItems: 1

This property wasn't in the previous binding?

Maxime

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 228 bytes --]