On Fri, Sep 19, 2025 at 01:48:43AM +0700, Dang Huynh wrote:
> The Intelligent Flow Controller (IFC) is a scatter/gather DMA
> controller.
>
> Signed-off-by: Dang Huynh <[email protected]>
> ---
> Documentation/devicetree/bindings/dma/rda,ifc.yaml | 45
> ++++++++++++++++++++++
> include/dt-bindings/dma/rda-ifc.h | 28 ++++++++++++++
> 2 files changed, 73 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/dma/rda,ifc.yaml
> b/Documentation/devicetree/bindings/dma/rda,ifc.yaml
> new file mode 100644
> index
> 0000000000000000000000000000000000000000..323e1e87cee09cfc7b64bf44bef61e4d1e91afa5
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/dma/rda,ifc.yaml
> @@ -0,0 +1,45 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/dma/rda,ifc.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: RDA Intelligent Flow Controller (IFC)
> +
> +maintainers:
> + - Dang Huynh <[email protected]>
> +
> +description: |
Don't need '|'.
> + RDA IFC is a DMA controller, it only supports scatter/gather lists.
> +
> +allOf:
> + - $ref: dma-controller.yaml#
> +
> +properties:
> + compatible:
> + items:
> + - enum:
> + - rda,8810pl-ifc
> + - const: rda,ifc
> +
> + reg:
> + maxItems: 1
> +
> + "#dma-cells":
> + const: 1
> + description:
> + The cell corresponding to DMA request ID
> +
> +required:
> + - compatible
> + - reg
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + dma-controller@f0000 {
> + compatible = "rda,8810pl-ifc", "rda,ifc";
> + reg = <0xf0000 0x1000>;
> + #dma-cells = <1>;
> + };
> diff --git a/include/dt-bindings/dma/rda-ifc.h
> b/include/dt-bindings/dma/rda-ifc.h
> new file mode 100644
> index
> 0000000000000000000000000000000000000000..af4bae0542aa71690351e2406d0945a61eff72c1
> --- /dev/null
> +++ b/include/dt-bindings/dma/rda-ifc.h
> @@ -0,0 +1,28 @@
> +/* SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause */
> +
> +#ifndef __DT_BINDINGS_DMA_RDA_IFC_H__
> +#define __DT_BINDINGS_DMA_RDA_IFC_H__
> +
> +#define IFC_UART1_TX 0
> +#define IFC_UART1_RX 1
> +#define IFC_UART2_TX 2
> +#define IFC_UART2_RX 3
> +#define IFC_SPI1_TX 4
> +#define IFC_SPI1_RX 5
> +#define IFC_SPI2_TX 6
> +#define IFC_SPI2_RX 7
> +#define IFC_SPI3_TX 8
> +#define IFC_SPI3_RX 9
> +#define IFC_SDMMC1_TX 10
> +#define IFC_SDMMC1_RX 11
> +#define IFC_SDMMC2_TX 12
> +#define IFC_SDMMC2_RX 13
> +#define IFC_SDMMC3_TX 14
> +#define IFC_SDMMC3_RX 15
> +#define IFC_NFSC_TX 16
> +#define IFC_NFSC_RX 17
> +#define IFC_UART3_TX 18
> +#define IFC_UART3_RX 19
> +#define IFC_NO_REQUEST 20
These numbers are defined by the h/w (like IRQ numbers)? If so, drop the
header. We don't do headers for h/w numbers.
Rob
