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There are two DMA controllers on the A523, one in the main system area and the other for the MCU. These are the same as the one found on the A100. The only difference is the DMA endpoint (DRQ) layout. Since the number of channels and endpoints are described with additional generic properties, just add new A523-specific compatible strings and fallback to the A100 one. Acked-by: Conor Dooley <conor.dooley@microchip.com> Link: https://patch.msgid.link/20251027125655.793277-2-wens@kernel.org Signed-off-by: Chen-Yu Tsai <wens@kernel.org>
103 lines
1.8 KiB
YAML
103 lines
1.8 KiB
YAML
# SPDX-License-Identifier: GPL-2.0
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/dma/allwinner,sun50i-a64-dma.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Allwinner A64 DMA Controller
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maintainers:
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- Chen-Yu Tsai <wens@csie.org>
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- Maxime Ripard <mripard@kernel.org>
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allOf:
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- $ref: dma-controller.yaml#
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properties:
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"#dma-cells":
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const: 1
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description: The cell is the request line number.
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compatible:
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oneOf:
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- enum:
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- allwinner,sun20i-d1-dma
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- allwinner,sun50i-a64-dma
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- allwinner,sun50i-a100-dma
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- allwinner,sun50i-h6-dma
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- items:
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- const: allwinner,sun8i-r40-dma
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- const: allwinner,sun50i-a64-dma
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- items:
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- enum:
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- allwinner,sun50i-h616-dma
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- allwinner,sun55i-a523-dma
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- allwinner,sun55i-a523-mcu-dma
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- const: allwinner,sun50i-a100-dma
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reg:
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maxItems: 1
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interrupts:
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maxItems: 1
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clocks:
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minItems: 1
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maxItems: 2
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clock-names:
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items:
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- const: bus
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- const: mbus
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resets:
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maxItems: 1
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required:
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- "#dma-cells"
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- compatible
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- reg
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- interrupts
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- clocks
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- resets
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- dma-channels
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if:
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properties:
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compatible:
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contains:
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enum:
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- allwinner,sun20i-d1-dma
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- allwinner,sun50i-a100-dma
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- allwinner,sun50i-h6-dma
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then:
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properties:
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clocks:
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minItems: 2
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required:
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- clock-names
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else:
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properties:
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clocks:
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maxItems: 1
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unevaluatedProperties: false
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examples:
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- |
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dma: dma-controller@1c02000 {
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compatible = "allwinner,sun50i-a64-dma";
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reg = <0x01c02000 0x1000>;
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interrupts = <0 50 4>;
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clocks = <&ccu 30>;
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dma-channels = <8>;
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dma-requests = <27>;
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resets = <&ccu 7>;
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#dma-cells = <1>;
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};
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...
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