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2ccf482268
Document the IPG and AHB clocks that are needed by the DMA hardware as required properties. It is not possible to have DMA functional without the DMA clocks being turned on. Signed-off-by: Fabio Estevam <festevam@denx.de> Acked-by: Conor Dooley <conor.dooley@microchip.com> Link: https://lore.kernel.org/r/20240807170517.64290-1-festevam@gmail.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
71 lines
1.3 KiB
YAML
71 lines
1.3 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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$id: http://devicetree.org/schemas/dma/fsl,imx-dma.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Freescale Direct Memory Access (DMA) Controller for i.MX
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maintainers:
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- Animesh Agarwal <animeshagarwal28@gmail.com>
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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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- fsl,imx1-dma
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- fsl,imx21-dma
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- fsl,imx27-dma
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reg:
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maxItems: 1
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interrupts:
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items:
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- description: DMA complete interrupt
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- description: DMA Error interrupt
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minItems: 1
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clocks:
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maxItems: 2
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clock-names:
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items:
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- const: ipg
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- const: ahb
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"#dma-cells":
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const: 1
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dma-channels:
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const: 16
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dma-requests:
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description: Number of DMA requests supported.
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required:
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- compatible
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- reg
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- interrupts
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- "#dma-cells"
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- clocks
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- clock-names
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/clock/imx27-clock.h>
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dma-controller@10001000 {
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compatible = "fsl,imx27-dma";
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reg = <0x10001000 0x1000>;
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interrupts = <32 33>;
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#dma-cells = <1>;
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dma-channels = <16>;
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clocks = <&clks IMX27_CLK_DMA_IPG_GATE>, <&clks IMX27_CLK_DMA_AHB_GATE>;
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clock-names = "ipg", "ahb";
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};
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