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

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Message-ID: <aOUIfaZY7-eUYoOS@swlinux02>
Date: Tue, 7 Oct 2025 20:33:01 +0800
From: CL Wang <cl634@...estech.com>
To: Conor Dooley <conor@...nel.org>
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>, <cl634@...estech.com>
Subject: Re: [PATCH V1 1/2] dt-bindings: dmaengine: Add support for
 ATCDMAC300 DMA engine

Hi Conor,

Thanks for your review.

Yes, the DMA driver supports the Qilai platform. I have updated the DTS binding as shown below.  
Could you please take a look and let me know if anything still needs to be adjusted?

 properties:
   compatible:
-    const: andestech,atcdmac300
+    oneOf:
+      - items:
+          - enum:
+              - andestech,qilai-dma
+          - const: andestech,atcdmac300
+      - const: andestech,atcdmac300
...
         dma-controller@...00000 {
-            compatible = "andestech,atcdmac300";
+            compatible = "andestech,qilai-dma", "andestech,atcdmac300";

Thank you again for your feedback.

Best regards,  
CL

On Thu, Oct 02, 2025 at 07:40:35PM +0100, Conor Dooley wrote:
> [EXTERNAL MAIL]

> 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
> >