linux-kernel - Re: [PATCH V1 1/2] dt-bindings: dmaengine: Add support for ATCDMAC300 DMA engine

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Message-ID: <20251002-absolute-spinning-f899e75b2c4a@spud>
Date: Thu, 2 Oct 2025 19:40:35 +0100
From: Conor Dooley <conor@...nel.org>
To: CL Wang <cl634@...estech.com>
Cc: vkoul@...nel.org, dmaengine@...r.kernel.org, robh@...nel.org,
	krzk+dt@...nel.org, conor+dt@...nel.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, tim609@...estech.com
Subject: Re: [PATCH V1 1/2] dt-bindings: dmaengine: Add support for
 ATCDMAC300 DMA engine

On Thu, Oct 02, 2025 at 09:16:58PM +0800, CL Wang wrote:
> Document devicetree bindings for Andes ATCDMAC300 DMA engine
> 
> Signed-off-by: CL Wang <cl634@...estech.com>
> ---
>  .../bindings/dma/andestech,atcdmac300.yaml    | 51 +++++++++++++++++++
>  MAINTAINERS                                   |  6 +++
>  2 files changed, 57 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/dma/andestech,atcdmac300.yaml
> 
> diff --git a/Documentation/devicetree/bindings/dma/andestech,atcdmac300.yaml b/Documentation/devicetree/bindings/dma/andestech,atcdmac300.yaml
> new file mode 100644
> index 000000000000..769694616517
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/dma/andestech,atcdmac300.yaml
> @@ -0,0 +1,51 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/dma/andestech,atcdmac300.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Andes ATCDMAC300 DMA Controller
> +
> +maintainers:
> +  - CL Wang <cl634@...estech.com>
> +
> +allOf:
> +  - $ref: dma-controller.yaml#
> +
> +properties:
> +  compatible:
> +    const: andestech,atcdmac300

"atcdmac300" sounds like the name of an IP block. What platforms are
actually using this? They should have platform-specific compatibles, for
example, "andestech,qilai-dma" if that's the platform where this is
supported.

> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  "#dma-cells":
> +    const: 1
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - "#dma-cells"
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +
> +    soc {
> +        #address-cells = <2>;
> +        #size-cells = <2>;
> +
> +        dma-controller@...00000 {
> +            compatible = "andestech,atcdmac300";
> +            reg = <0x0 0xf0c00000 0x0 0x1000>;
> +            interrupts = <10 IRQ_TYPE_LEVEL_HIGH>;
> +            #dma-cells = <1>;
> +        };
> +    };
> +...
> diff --git a/MAINTAINERS b/MAINTAINERS
> index fe168477caa4..dd3272cdadd6 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -1778,6 +1778,12 @@ S:	Supported
>  F:	drivers/clk/analogbits/*
>  F:	include/linux/clk/analogbits*
>  
> +ANDES DMA DRIVER
> +M:	CL Wang <cl634@...estech.com>
> +S:	Supported
> +F:	Documentation/devicetree/bindings/dma/andestech,atcdmac300.yaml
> +F:	drivers/dma/atcdmac300*
> +
>  ANDROID DRIVERS
>  M:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
>  M:	Arve Hjønnevåg <arve@...roid.com>
> -- 
> 2.34.1
> 

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