| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 1 | # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) |
| 2 | %YAML 1.2 |
| 3 | --- |
| 4 | $id: http://devicetree.org/schemas/dma/socionext,uniphier-xdmac.yaml# |
| 5 | $schema: http://devicetree.org/meta-schemas/core.yaml# |
| 6 | |
| 7 | title: Socionext UniPhier external DMA controller |
| 8 | |
| 9 | description: | |
| 10 | This describes the devicetree bindings for an external DMA engine to perform |
| 11 | memory-to-memory or peripheral-to-memory data transfer capable of supporting |
| 12 | 16 channels, implemented in Socionext UniPhier SoCs. |
| 13 | |
| 14 | maintainers: |
| 15 | - Kunihiko Hayashi <hayashi.kunihiko@socionext.com> |
| 16 | |
| 17 | allOf: |
| 18 | - $ref: dma-controller.yaml# |
| 19 | |
| 20 | properties: |
| 21 | compatible: |
| 22 | const: socionext,uniphier-xdmac |
| 23 | |
| 24 | reg: |
| 25 | maxItems: 1 |
| 26 | |
| 27 | interrupts: |
| 28 | maxItems: 1 |
| 29 | |
| 30 | "#dma-cells": |
| 31 | const: 2 |
| 32 | description: | |
| 33 | DMA request from clients consists of 2 cells: |
| 34 | 1. Channel index |
| 35 | 2. Transfer request factor number, If no transfer factor, use 0. |
| 36 | The number is SoC-specific, and this should be specified with |
| 37 | relation to the device to use the DMA controller. |
| 38 | |
| 39 | dma-channels: |
| 40 | minimum: 1 |
| 41 | maximum: 16 |
| 42 | |
| 43 | additionalProperties: false |
| 44 | |
| 45 | required: |
| 46 | - compatible |
| 47 | - reg |
| 48 | - interrupts |
| 49 | - "#dma-cells" |
| 50 | - dma-channels |
| 51 | |
| 52 | examples: |
| 53 | - | |
| 54 | xdmac: dma-controller@5fc10000 { |
| 55 | compatible = "socionext,uniphier-xdmac"; |
| 56 | reg = <0x5fc10000 0x5300>; |
| 57 | interrupts = <0 188 4>; |
| 58 | #dma-cells = <2>; |
| 59 | dma-channels = <16>; |
| 60 | }; |
| 61 | |
| 62 | ... |