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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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5bcf62748f
Convert the Spreadtrum SC9860 DMA bindings to DT schema. Changes during conversion: - rename file to match compatible - make interrupts optional, the AGCP DMA controller doesn't need it - describe the optional ashb_eb clock for the AGCP DMA controller Signed-off-by: Stanislav Jakubek <stano.jakubek@gmail.com> Reviewed-by: Rob Herring (Arm) <robh@kernel.org> Link: https://lore.kernel.org/r/Zob1+kGW1xeBKehA@standask-GA-A55M-S2HP Signed-off-by: Vinod Koul <vkoul@kernel.org>
93 lines
2.0 KiB
YAML
93 lines
2.0 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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$id: http://devicetree.org/schemas/dma/sprd,sc9860-dma.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Spreadtrum SC9860 DMA controller
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description: |
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There are three DMA controllers: AP DMA, AON DMA and AGCP DMA. For AGCP
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DMA controller, it can or do not request the IRQ, which will save
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system power without resuming system by DMA interrupts if AGCP DMA
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does not request the IRQ.
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maintainers:
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- Orson Zhai <orsonzhai@gmail.com>
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- Baolin Wang <baolin.wang7@gmail.com>
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- Chunyan Zhang <zhang.lyra@gmail.com>
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properties:
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compatible:
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const: sprd,sc9860-dma
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reg:
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maxItems: 1
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interrupts:
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maxItems: 1
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clocks:
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minItems: 1
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items:
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- description: DMA enable clock
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- description: optional ashb_eb clock, only for the AGCP DMA controller
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clock-names:
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minItems: 1
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items:
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- const: enable
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- const: ashb_eb
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'#dma-cells':
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const: 1
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dma-channels:
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const: 32
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'#dma-channels':
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const: 32
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deprecated: true
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required:
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- compatible
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- reg
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- clocks
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- clock-names
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- '#dma-cells'
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- dma-channels
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allOf:
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- $ref: dma-controller.yaml#
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unevaluatedProperties: false
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examples:
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- |
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#include <dt-bindings/clock/sprd,sc9860-clk.h>
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#include <dt-bindings/interrupt-controller/arm-gic.h>
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#include <dt-bindings/interrupt-controller/irq.h>
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/* AP DMA controller */
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dma-controller@20100000 {
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compatible = "sprd,sc9860-dma";
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reg = <0x20100000 0x4000>;
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interrupts = <GIC_SPI 42 IRQ_TYPE_LEVEL_HIGH>;
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clocks = <&apahb_gate CLK_DMA_EB>;
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clock-names = "enable";
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#dma-cells = <1>;
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dma-channels = <32>;
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};
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/* AGCP DMA controller */
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dma-controller@41580000 {
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compatible = "sprd,sc9860-dma";
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reg = <0x41580000 0x4000>;
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clocks = <&agcp_gate CLK_AGCP_DMAAP_EB>,
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<&agcp_gate CLK_AGCP_AP_ASHB_EB>;
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clock-names = "enable", "ashb_eb";
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#dma-cells = <1>;
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dma-channels = <32>;
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};
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...
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