linux-kernel - Re: [PATCH 1/5] dt-bindings: gpu: add bindings for the Microchip GFX2D GPU

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Message-ID: <20250911-iron-stadium-ea225e18bc42@spud>
Date: Thu, 11 Sep 2025 19:05:21 +0100
From: Conor Dooley <conor@...nel.org>
To: Cyrille Pitchen <cyrille.pitchen@...rochip.com>
Cc: David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Nicolas Ferre <nicolas.ferre@...rochip.com>,
	Alexandre Belloni <alexandre.belloni@...tlin.com>,
	Claudiu Beznea <claudiu.beznea@...on.dev>,
	Russell King <linux@...linux.org.uk>,
	dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 1/5] dt-bindings: gpu: add bindings for the Microchip
 GFX2D GPU

On Thu, Sep 11, 2025 at 05:26:25PM +0200, Cyrille Pitchen wrote:
> The Microchip GFX2D GPU is embedded in the SAM9X60 and SAM9X7 SoC family.
> Describe how the GFX2D GPU is integrated in these SoCs, including
> register space, interrupt and clock.
> 
> Signed-off-by: Cyrille Pitchen <cyrille.pitchen@...rochip.com>
> ---
>  .../devicetree/bindings/gpu/microchip,gfx2d.yaml   | 53 ++++++++++++++++++++++
>  1 file changed, 53 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/gpu/microchip,gfx2d.yaml b/Documentation/devicetree/bindings/gpu/microchip,gfx2d.yaml
> new file mode 100644
> index 0000000000000000000000000000000000000000..e416e13bc6627a0fef3c70625a6a3e2d91636ffc
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/gpu/microchip,gfx2d.yaml

Filename matching a compatible please.

> @@ -0,0 +1,53 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/gpu/microchip,gfx2d.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Microchip GFX2D GPU
> +
> +maintainers:
> +  - Cyrille Pitchen <cyrille.pitchen@...rochip.com>
> +
> +properties:
> +  compatible:
> +    enum:
> +      - microchip,sam9x60-gfx2d
> +      - microchip,sam9x7-gfx2d
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 1
> +
> +  clock-names:
> +    items:
> +      const: periph_clk
> +    maxItems: 1

Why do you need clock-names if you only have one clock?
If there's a reason to keep it, drop the _clk - it's redundant.

> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - clocks
> +  - clock-names
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +    #include <dt-bindings/clock/at91.h>
> +    gfx2d@...18000 {

"gfx2d" is not a generic node name, I assume this should actually be
"gpu"?

Cheers,
Conor.

> +      compatible = "microchip,sam9x60-gfx2d";
> +      reg = <0xf0018000 0x4000>;
> +      interrupts = <36 IRQ_TYPE_LEVEL_HIGH 0>;
> +      clocks = <&pmc PMC_TYPE_PERIPHERAL 36>;
> +      clock-names = "periph_clk";
> +    };
> +
> +...
> 
> -- 
> 2.48.1
> 
> 

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