mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
synced 2025-09-01 06:39:05 +00:00
994b5709f9
The DMA IP of Sophgo CV18XX/SG200X is based on a DW AXI CORE, with an additional channel remap register located in the top system control area. The DMA channel is exclusive to each core. In addition, the DMA multiplexer is a subdevice of system controller, so this binding only contains necessary properties for the multiplexer itself. Add the dmamux binding for CV18XX/SG200X series SoC. Signed-off-by: Inochi Amaoto <inochiama@gmail.com> Reviewed-by: Conor Dooley <conor.dooley@microchip.com> Link: https://lore.kernel.org/r/20250611081000.1187374-2-inochiama@gmail.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
52 lines
1.1 KiB
YAML
52 lines
1.1 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
|
|
%YAML 1.2
|
|
---
|
|
$id: http://devicetree.org/schemas/dma/sophgo,cv1800b-dmamux.yaml#
|
|
$schema: http://devicetree.org/meta-schemas/core.yaml#
|
|
|
|
title: Sophgo CV1800/SG200 Series DMA multiplexer
|
|
|
|
maintainers:
|
|
- Inochi Amaoto <inochiama@gmail.com>
|
|
|
|
description:
|
|
The DMA multiplexer of CV1800 is a subdevice of the system
|
|
controller. It support mapping 8 channels, but each channel
|
|
can be mapped only once.
|
|
|
|
allOf:
|
|
- $ref: dma-router.yaml#
|
|
|
|
properties:
|
|
compatible:
|
|
const: sophgo,cv1800b-dmamux
|
|
|
|
reg:
|
|
items:
|
|
- description: DMA channal remapping register
|
|
- description: DMA channel interrupt mapping register
|
|
|
|
'#dma-cells':
|
|
const: 2
|
|
description:
|
|
The first cells is device id. The second one is the cpu id.
|
|
|
|
dma-masters:
|
|
maxItems: 1
|
|
|
|
required:
|
|
- reg
|
|
- '#dma-cells'
|
|
- dma-masters
|
|
|
|
additionalProperties: false
|
|
|
|
examples:
|
|
- |
|
|
dma-router@154 {
|
|
compatible = "sophgo,cv1800b-dmamux";
|
|
reg = <0x154 0x8>, <0x298 0x4>;
|
|
#dma-cells = <2>;
|
|
dma-masters = <&dmac>;
|
|
};
|