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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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1fe283e850
The devicetree bindings for Freescale DMA engines have so far existed as a text file. This patch converts them to YAML, and specifies all the compatible strings currently in use in arch/powerpc/boot/dts. Signed-off-by: J. Neuschäfer <j.ne@posteo.net> Reviewed-by: Rob Herring (Arm) <robh@kernel.org> Link: https://lore.kernel.org/r/20250308-ppcyaml-dma-v4-1-20392ea81ec6@posteo.net Signed-off-by: Vinod Koul <vkoul@kernel.org>
138 lines
3.4 KiB
YAML
138 lines
3.4 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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$id: http://devicetree.org/schemas/dma/fsl,elo-dma.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Freescale Elo DMA Controller
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maintainers:
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- J. Neuschäfer <j.ne@posteo.net>
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description:
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This is a little-endian 4-channel DMA controller, used in Freescale mpc83xx
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series chips such as mpc8315, mpc8349, mpc8379 etc.
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properties:
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compatible:
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items:
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- enum:
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- fsl,mpc8313-dma
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- fsl,mpc8315-dma
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- fsl,mpc8323-dma
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- fsl,mpc8347-dma
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- fsl,mpc8349-dma
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- fsl,mpc8360-dma
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- fsl,mpc8377-dma
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- fsl,mpc8378-dma
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- fsl,mpc8379-dma
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- const: fsl,elo-dma
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reg:
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items:
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- description:
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DMA General Status Register, i.e. DGSR which contains status for
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all the 4 DMA channels.
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cell-index:
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$ref: /schemas/types.yaml#/definitions/uint32
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description: Controller index. 0 for controller @ 0x8100.
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ranges: true
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"#address-cells":
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const: 1
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"#size-cells":
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const: 1
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interrupts:
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maxItems: 1
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description: Controller interrupt.
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required:
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- compatible
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- reg
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patternProperties:
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"^dma-channel@[0-9a-f]+$":
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type: object
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additionalProperties: false
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properties:
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compatible:
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oneOf:
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# native DMA channel
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- items:
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- enum:
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- fsl,mpc8315-dma-channel
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- fsl,mpc8323-dma-channel
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- fsl,mpc8347-dma-channel
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- fsl,mpc8349-dma-channel
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- fsl,mpc8360-dma-channel
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- fsl,mpc8377-dma-channel
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- fsl,mpc8378-dma-channel
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- fsl,mpc8379-dma-channel
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- const: fsl,elo-dma-channel
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# audio DMA channel, see fsl,ssi.yaml
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- const: fsl,ssi-dma-channel
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reg:
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maxItems: 1
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cell-index:
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description: DMA channel index starts at 0.
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interrupts:
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maxItems: 1
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description:
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Per-channel interrupt. Only necessary if no controller interrupt has
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been provided.
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additionalProperties: 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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dma@82a8 {
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compatible = "fsl,mpc8349-dma", "fsl,elo-dma";
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reg = <0x82a8 4>;
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#address-cells = <1>;
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#size-cells = <1>;
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ranges = <0 0x8100 0x1a4>;
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interrupts = <71 IRQ_TYPE_LEVEL_LOW>;
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cell-index = <0>;
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dma-channel@0 {
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compatible = "fsl,mpc8349-dma-channel", "fsl,elo-dma-channel";
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reg = <0 0x80>;
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cell-index = <0>;
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interrupts = <71 IRQ_TYPE_LEVEL_LOW>;
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};
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dma-channel@80 {
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compatible = "fsl,mpc8349-dma-channel", "fsl,elo-dma-channel";
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reg = <0x80 0x80>;
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cell-index = <1>;
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interrupts = <71 IRQ_TYPE_LEVEL_LOW>;
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};
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dma-channel@100 {
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compatible = "fsl,mpc8349-dma-channel", "fsl,elo-dma-channel";
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reg = <0x100 0x80>;
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cell-index = <2>;
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interrupts = <71 IRQ_TYPE_LEVEL_LOW>;
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};
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dma-channel@180 {
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compatible = "fsl,mpc8349-dma-channel", "fsl,elo-dma-channel";
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reg = <0x180 0x80>;
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cell-index = <3>;
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interrupts = <71 IRQ_TYPE_LEVEL_LOW>;
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};
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};
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...
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