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|
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/dma/mediatek,uart-dma.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: MediaTek UART APDMA controller
maintainers:
- Long Cheng <long.cheng@mediatek.com>
description: |
The MediaTek UART APDMA controller provides DMA capabilities
for the UART peripheral bus.
allOf:
- $ref: dma-controller.yaml#
properties:
compatible:
oneOf:
- items:
- enum:
- mediatek,mt2712-uart-dma
- mediatek,mt6795-uart-dma
- mediatek,mt8365-uart-dma
- mediatek,mt8516-uart-dma
- const: mediatek,mt6577-uart-dma
- enum:
- mediatek,mt6577-uart-dma
reg:
minItems: 1
maxItems: 16
interrupts:
description: |
TX, RX interrupt lines for each UART APDMA channel
minItems: 1
maxItems: 16
clocks:
description: Must contain one entry for the APDMA main clock
maxItems: 1
clock-names:
const: apdma
"#dma-cells":
const: 1
description: |
The first cell specifies the UART APDMA channel number
dma-requests:
description: |
Number of virtual channels of the UART APDMA controller
maximum: 16
mediatek,dma-33bits:
type: boolean
description: Enable 33-bits UART APDMA support
required:
- compatible
- reg
- interrupts
additionalProperties: false
if:
not:
required:
- dma-requests
then:
properties:
interrupts:
maxItems: 8
reg:
maxItems: 8
examples:
- |
#include <dt-bindings/interrupt-controller/arm-gic.h>
#include <dt-bindings/clock/mt2712-clk.h>
soc {
#address-cells = <2>;
#size-cells = <2>;
apdma: dma-controller@11000400 {
compatible = "mediatek,mt2712-uart-dma",
"mediatek,mt6577-uart-dma";
reg = <0 0x11000400 0 0x80>,
<0 0x11000480 0 0x80>,
<0 0x11000500 0 0x80>,
<0 0x11000580 0 0x80>,
<0 0x11000600 0 0x80>,
<0 0x11000680 0 0x80>,
<0 0x11000700 0 0x80>,
<0 0x11000780 0 0x80>,
<0 0x11000800 0 0x80>,
<0 0x11000880 0 0x80>,
<0 0x11000900 0 0x80>,
<0 0x11000980 0 0x80>;
interrupts = <GIC_SPI 103 IRQ_TYPE_LEVEL_LOW>,
<GIC_SPI 104 IRQ_TYPE_LEVEL_LOW>,
<GIC_SPI 105 IRQ_TYPE_LEVEL_LOW>,
<GIC_SPI 106 IRQ_TYPE_LEVEL_LOW>,
<GIC_SPI 107 IRQ_TYPE_LEVEL_LOW>,
<GIC_SPI 108 IRQ_TYPE_LEVEL_LOW>,
<GIC_SPI 109 IRQ_TYPE_LEVEL_LOW>,
<GIC_SPI 110 IRQ_TYPE_LEVEL_LOW>,
<GIC_SPI 111 IRQ_TYPE_LEVEL_LOW>,
<GIC_SPI 112 IRQ_TYPE_LEVEL_LOW>,
<GIC_SPI 113 IRQ_TYPE_LEVEL_LOW>,
<GIC_SPI 114 IRQ_TYPE_LEVEL_LOW>;
dma-requests = <12>;
clocks = <&pericfg CLK_PERI_AP_DMA>;
clock-names = "apdma";
mediatek,dma-33bits;
#dma-cells = <1>;
};
};
...
|
