Re: [PATCH v3 1/7] dt-bindings: dma: Introduce RZN1 dmamux bindings

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Fri, Feb 25, 2022 at 12:23:56PM +0100, Miquel Raynal wrote:
> The Renesas RZN1 DMA IP is a based on a DW core, with eg. an additional
> dmamux register located in the system control area which can take up to
> 32 requests (16 per DMA controller). Each DMA channel can be wired to
> two different peripherals.

This should be a child of and referenced by the 'system control area' 
schema. Also, add a reg property for the register.


> Signed-off-by: Miquel Raynal <miquel.raynal@xxxxxxxxxxx>
> Reviewed-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
> ---
>  .../bindings/dma/renesas,rzn1-dmamux.yaml     | 42 +++++++++++++++++++
>  MAINTAINERS                                   |  1 +
>  2 files changed, 43 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/dma/renesas,rzn1-dmamux.yaml
> 
> diff --git a/Documentation/devicetree/bindings/dma/renesas,rzn1-dmamux.yaml b/Documentation/devicetree/bindings/dma/renesas,rzn1-dmamux.yaml
> new file mode 100644
> index 000000000000..e2c82e43b8b1
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/dma/renesas,rzn1-dmamux.yaml
> @@ -0,0 +1,42 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/dma/renesas,rzn1-dmamux.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Renesas RZ/N1 DMA mux
> +
> +maintainers:
> +  - Miquel Raynal <miquel.raynal@xxxxxxxxxxx>
> +
> +allOf:
> +  - $ref: "dma-router.yaml#"
> +
> +properties:
> +  compatible:
> +    const: renesas,rzn1-dmamux
> +
> +  '#dma-cells':
> +    const: 6
> +    description:
> +      The first four cells are dedicated to the master DMA controller. The fifth
> +      cell gives the DMA mux bit index that must be set starting from 0. The
> +      sixth cell gives the binary value that must be written there, ie. 0 or 1.
> +
> +  dma-masters:
> +    minItems: 1
> +    maxItems: 2
> +
> +  dma-requests:
> +    const: 32
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    dma-router {
> +      compatible = "renesas,rzn1-dmamux";
> +      #dma-cells = <6>;
> +      dma-masters = <&dma0 &dma1>;
> +      dma-requests = <32>;
> +    };
> diff --git a/MAINTAINERS b/MAINTAINERS
> index ea3e6c914384..c70c9c39a2f3 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -18636,6 +18636,7 @@ SYNOPSYS DESIGNWARE DMAC DRIVER
>  M:	Viresh Kumar <vireshk@xxxxxxxxxx>
>  R:	Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
>  S:	Maintained
> +F:	Documentation/devicetree/bindings/dma/renesas,rzn1-dmamux.yaml
>  F:	Documentation/devicetree/bindings/dma/snps,dma-spear1340.yaml
>  F:	drivers/dma/dw/
>  F:	include/dt-bindings/dma/dw-dmac.h
> -- 
> 2.27.0
> 
> 



[Index of Archives]     [Device Tree Compilter]     [Device Tree Spec]     [Linux Driver Backports]     [Video for Linux]     [Linux USB Devel]     [Linux PCI Devel]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [XFree86]     [Yosemite Backpacking]


  Powered by Linux