82 lines
2.0 KiB
YAML
82 lines
2.0 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/dma/loongson,ls2k0300-dma.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Loongson-2 Multi-Channel DMA controller
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description:
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The Loongson-2 Multi-Channel DMA controller is used for transferring data
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between system memory and the peripherals on the APB bus.
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maintainers:
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- Binbin Zhou <zhoubinbin@loongson.cn>
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allOf:
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- $ref: dma-controller.yaml#
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properties:
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compatible:
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enum:
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- loongson,ls2k0300-dma
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- loongson,ls2k3000-dma
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reg:
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maxItems: 1
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interrupts:
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description:
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Should contain all of the per-channel DMA interrupts in ascending order
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with respect to the DMA channel index.
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minItems: 4
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maxItems: 8
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clocks:
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maxItems: 1
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'#dma-cells':
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const: 2
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description: |
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DMA request from clients consists of 2 cells:
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1. Channel index
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2. Transfer request factor number, If no transfer factor, use 0.
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The number is SoC-specific, and this should be specified with
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relation to the device to use the DMA controller.
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dma-channels:
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enum: [4, 8]
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required:
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- compatible
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- reg
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- interrupts
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- clocks
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- '#dma-cells'
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- dma-channels
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unevaluatedProperties: false
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examples:
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- |
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#include <dt-bindings/interrupt-controller/irq.h>
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#include <dt-bindings/clock/loongson,ls2k-clk.h>
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dma-controller@1612c000 {
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compatible = "loongson,ls2k0300-dma";
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reg = <0x1612c000 0xff>;
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interrupt-parent = <&liointc0>;
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interrupts = <23 IRQ_TYPE_LEVEL_HIGH>,
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<24 IRQ_TYPE_LEVEL_HIGH>,
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<25 IRQ_TYPE_LEVEL_HIGH>,
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<26 IRQ_TYPE_LEVEL_HIGH>,
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<27 IRQ_TYPE_LEVEL_HIGH>,
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<28 IRQ_TYPE_LEVEL_HIGH>,
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<29 IRQ_TYPE_LEVEL_HIGH>,
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<30 IRQ_TYPE_LEVEL_HIGH>;
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clocks = <&clk LS2K0300_CLK_APB_GATE>;
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#dma-cells = <2>;
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dma-channels = <8>;
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};
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...
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