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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/dma/fsl,eloplus-dma.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Freescale EloPlus DMA Controller
maintainers:
- J. Neuschäfer <j.ne@posteo.net>
description:
This is a 4-channel DMA controller with extended addresses and chaining,
mainly used in Freescale mpc85xx/86xx, Pxxx and BSC series chips, such as
mpc8540, mpc8641 p4080, bsc9131 etc.
properties:
compatible:
oneOf:
- items:
- enum:
- fsl,mpc8540-dma
- fsl,mpc8541-dma
- fsl,mpc8548-dma
- fsl,mpc8555-dma
- fsl,mpc8560-dma
- fsl,mpc8572-dma
- fsl,mpc8641-dma
- const: fsl,eloplus-dma
- const: fsl,eloplus-dma
reg:
items:
- description:
DMA General Status Register, i.e. DGSR which contains
status for all the 4 DMA channels
cell-index:
$ref: /schemas/types.yaml#/definitions/uint32
description:
controller index. 0 for controller @ 0x21000, 1 for controller @ 0xc000
ranges: true
"#address-cells":
const: 1
"#size-cells":
const: 1
interrupts:
maxItems: 1
description: Controller interrupt.
patternProperties:
"^dma-channel@[0-9a-f]+$":
type: object
additionalProperties: false
properties:
compatible:
oneOf:
# native DMA channel
- items:
- enum:
- fsl,mpc8540-dma-channel
- fsl,mpc8541-dma-channel
- fsl,mpc8548-dma-channel
- fsl,mpc8555-dma-channel
- fsl,mpc8560-dma-channel
- fsl,mpc8572-dma-channel
- const: fsl,eloplus-dma-channel
# audio DMA channel, see fsl,ssi.yaml
- const: fsl,ssi-dma-channel
reg:
maxItems: 1
cell-index:
description: DMA channel index starts at 0.
interrupts:
maxItems: 1
description:
Per-channel interrupt. Only necessary if no controller interrupt has
been provided.
additionalProperties: false
examples:
- |
#include <dt-bindings/interrupt-controller/irq.h>
dma@21300 {
compatible = "fsl,mpc8540-dma", "fsl,eloplus-dma";
reg = <0x21300 4>;
#address-cells = <1>;
#size-cells = <1>;
ranges = <0 0x21100 0x200>;
cell-index = <0>;
dma-channel@0 {
compatible = "fsl,mpc8540-dma-channel", "fsl,eloplus-dma-channel";
reg = <0 0x80>;
cell-index = <0>;
interrupts = <20 IRQ_TYPE_EDGE_FALLING>;
};
dma-channel@80 {
compatible = "fsl,mpc8540-dma-channel", "fsl,eloplus-dma-channel";
reg = <0x80 0x80>;
cell-index = <1>;
interrupts = <21 IRQ_TYPE_EDGE_FALLING>;
};
dma-channel@100 {
compatible = "fsl,mpc8540-dma-channel", "fsl,eloplus-dma-channel";
reg = <0x100 0x80>;
cell-index = <2>;
interrupts = <22 IRQ_TYPE_EDGE_FALLING>;
};
dma-channel@180 {
compatible = "fsl,mpc8540-dma-channel", "fsl,eloplus-dma-channel";
reg = <0x180 0x80>;
cell-index = <3>;
interrupts = <23 IRQ_TYPE_EDGE_FALLING>;
};
};
...
|
