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