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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/dma/stm32/st,stm32-dmamux.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: STMicroelectronics STM32 DMA MUX (DMA request router)
maintainers:
- Amelie Delaunay <amelie.delaunay@foss.st.com>
allOf:
- $ref: /schemas/dma/dma-router.yaml#
properties:
"#dma-cells":
const: 3
description: |
Each cell represents the following:
1. The mux input number/line for the request
2. Bitfield representing DMA channel configuration that is passed
to the real DMA controller
3. Bitfield representing device dependent DMA features passed to
the real DMA controller
For bitfield definitions of cells 2 and 3, see the associated
bindings doc for the actual DMA controller in st,stm32-dma.yaml.
compatible:
const: st,stm32h7-dmamux
reg:
maxItems: 1
clocks:
maxItems: 1
resets:
maxItems: 1
access-controllers:
minItems: 1
maxItems: 2
required:
- compatible
- reg
- dma-masters
unevaluatedProperties: false
examples:
- |
#include <dt-bindings/interrupt-controller/arm-gic.h>
#include <dt-bindings/clock/stm32mp1-clks.h>
#include <dt-bindings/reset/stm32mp1-resets.h>
dma-router@40020800 {
compatible = "st,stm32h7-dmamux";
reg = <0x40020800 0x3c>;
#dma-cells = <3>;
dma-requests = <128>;
dma-channels = <16>;
dma-masters = <&dma1>, <&dma2>;
clocks = <&timer_clk>;
};
...
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