diff mbox series

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

Message ID 20220225112403.505562-2-miquel.raynal@bootlin.com (mailing list archive)
State Not Applicable, archived
Headers show
Series RZN1 DMA support | expand

Commit Message

Miquel Raynal Feb. 25, 2022, 11:23 a.m. UTC 
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.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
 .../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

Comments

Rob Herring (Arm) March 3, 2022, 1:42 p.m. UTC | #1 
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@bootlin.com>
> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
> ---
>  .../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@bootlin.com>
> +
> +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@kernel.org>
>  R:	Andy Shevchenko <andriy.shevchenko@linux.intel.com>
>  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
> 
>
diff mbox series

Patch

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@bootlin.com>
+
+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@kernel.org>
 R:	Andy Shevchenko <andriy.shevchenko@linux.intel.com>
 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