[v9,1/3] dt-bindings: dmaengine: Add dma multiplexer for CV18XX/SG200X series SoC

Commit Message

Inochi Amaoto Aug. 2, 2024, 8:32 a.m. UTC

The DMA IP of Sophgo CV18XX/SG200X is based on a DW AXI CORE, with
an additional channel remap register located in the top system control
area. The DMA channel is exclusive to each core.

In addition, the DMA multiplexer is a subdevice of system controller,
so this binding only contains necessary properties for the multiplexer
itself.

Add the dmamux binding for CV18XX/SG200X series SoC.

Signed-off-by: Inochi Amaoto <[e-mail]>
---
 .../bindings/dma/sophgo,cv1800-dmamux.yaml    | 51 +++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/dma/sophgo,cv1800-dmamux.yaml

--
2.46.0

Comments

Krzysztof Kozlowski Aug. 5, 2024, 5:32 p.m. UTC | #1

On 02/08/2024 10:32, Inochi Amaoto wrote:
> The DMA IP of Sophgo CV18XX/SG200X is based on a DW AXI CORE, with
> an additional channel remap register located in the top system control
> area. The DMA channel is exclusive to each core.
> 
> In addition, the DMA multiplexer is a subdevice of system controller,
> so this binding only contains necessary properties for the multiplexer
> itself.
> 
> Add the dmamux binding for CV18XX/SG200X series SoC.
> 
> Signed-off-by: Inochi Amaoto <[e-mail]>
> ---
>  .../bindings/dma/sophgo,cv1800-dmamux.yaml    | 51 +++++++++++++++++++
>  1 file changed, 51 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/dma/sophgo,cv1800-dmamux.yaml

Filename should match compatible.

> 
> diff --git a/Documentation/devicetree/bindings/dma/sophgo,cv1800-dmamux.yaml b/Documentation/devicetree/bindings/dma/sophgo,cv1800-dmamux.yaml
> new file mode 100644
> index 000000000000..11a098ed138a
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/dma/sophgo,cv1800-dmamux.yaml
> @@ -0,0 +1,51 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/dma/sophgo,cv1800-dmamux.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Sophgo CV1800/SG200 Series DMA multiplexer
> +
> +maintainers:
> +  - Inochi Amaoto <[e-mail]>
> +
> +description: |

Do not need '|' unless you need to preserve formatting.

> +  The DMA multiplexer of CV1800 is a subdevice of the system
> +  controller. It support mapping 8 channels, but each channel
> +  can be mapped only once.
> +



Best regards,
Krzysztof

Inochi Amaoto Aug. 11, 2024, 5:15 a.m. UTC | #2

On Mon, Aug 05, 2024 at 07:32:17PM GMT, Krzysztof Kozlowski wrote:
> On 02/08/2024 10:32, Inochi Amaoto wrote:
> > The DMA IP of Sophgo CV18XX/SG200X is based on a DW AXI CORE, with
> > an additional channel remap register located in the top system control
> > area. The DMA channel is exclusive to each core.
> > 
> > In addition, the DMA multiplexer is a subdevice of system controller,
> > so this binding only contains necessary properties for the multiplexer
> > itself.
> > 
> > Add the dmamux binding for CV18XX/SG200X series SoC.
> > 
> > Signed-off-by: Inochi Amaoto <[e-mail]>
> > ---
> >  .../bindings/dma/sophgo,cv1800-dmamux.yaml    | 51 +++++++++++++++++++
> >  1 file changed, 51 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/dma/sophgo,cv1800-dmamux.yaml
> 
> Filename should match compatible.
> 
> > 
> > diff --git a/Documentation/devicetree/bindings/dma/sophgo,cv1800-dmamux.yaml b/Documentation/devicetree/bindings/dma/sophgo,cv1800-dmamux.yaml
> > new file mode 100644
> > index 000000000000..11a098ed138a
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/dma/sophgo,cv1800-dmamux.yaml
> > @@ -0,0 +1,51 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/dma/sophgo,cv1800-dmamux.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Sophgo CV1800/SG200 Series DMA multiplexer
> > +
> > +maintainers:
> > +  - Inochi Amaoto <[e-mail]>
> > +
> > +description: |
> 
> Do not need '|' unless you need to preserve formatting.
> 
> > +  The DMA multiplexer of CV1800 is a subdevice of the system
> > +  controller. It support mapping 8 channels, but each channel
> > +  can be mapped only once.
> > +
> 
> 
> 
> Best regards,
> Krzysztof
> 

Thanks

Regard,
Inochi

Patch

diff --git a/Documentation/devicetree/bindings/dma/sophgo,cv1800-dmamux.yaml b/Documentation/devicetree/bindings/dma/sophgo,cv1800-dmamux.yaml
new file mode 100644
index 000000000000..11a098ed138a
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/sophgo,cv1800-dmamux.yaml
@@ -0,0 +1,51 @@ 
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/dma/sophgo,cv1800-dmamux.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Sophgo CV1800/SG200 Series DMA multiplexer
+
+maintainers:
+  - Inochi Amaoto <[e-mail]>
+
+description: |
+  The DMA multiplexer of CV1800 is a subdevice of the system
+  controller. It support mapping 8 channels, but each channel
+  can be mapped only once.
+
+allOf:
+  - $ref: dma-router.yaml#
+
+properties:
+  compatible:
+    const: sophgo,cv1800b-dmamux
+
+  reg:
+    items:
+      - description: DMA channal remapping register
+      - description: DMA channel interrupt mapping register
+
+  '#dma-cells':
+    const: 2
+    description:
+      The first cells is device id. The second one is the cpu id.
+
+  dma-masters:
+    maxItems: 1
+
+required:
+  - reg
+  - '#dma-cells'
+  - dma-masters
+
+additionalProperties: false
+
+examples:
+  - |
+    dma-router@154 {
+      compatible = "sophgo,cv1800b-dmamux";
+      reg = <0x154 0x8>, <0x298 0x4>;
+      #dma-cells = <2>;
+      dma-masters = <&dmac>;
+    };