| # 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>; |
| }; |
| }; |
| |
| ... |
