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dt-bindings: dmaengine: Add MediaTek High-Speed DMA controller bindings 

Document the devicetree bindings for MediaTek High-Speed DMA controller
which could be found on MT7623 SoC or other similar Mediatek SoCs.

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Sean Wang 2018-03-15 15:40:35 +08:00 committed by Vinod Koul
parent 7928b2cbe5
commit 33f32c0e1e
1 changed files with 33 additions and 0 deletions
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Documentation/devicetree/bindings/dma/mtk-hsdma.txt Normal file
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MediaTek High-Speed DMA Controller
==================================
This device follows the generic DMA bindings defined in dma/dma.txt.
Required properties:
- compatible: Must be one of
"mediatek,mt7622-hsdma": for MT7622 SoC
"mediatek,mt7623-hsdma": for MT7623 SoC
- reg: Should contain the register's base address and length.
- interrupts: Should contain a reference to the interrupt used by this
device.
- clocks: Should be the clock specifiers corresponding to the entry in
clock-names property.
- clock-names: Should contain "hsdma" entries.
- power-domains: Phandle to the power domain that the device is part of
- #dma-cells: The length of the DMA specifier, must be <1>. This one cell
in dmas property of a client device represents the channel
number.
Example:
hsdma: dma-controller@1b007000 {
compatible = "mediatek,mt7623-hsdma";
reg = <0 0x1b007000 0 0x1000>;
interrupts = <GIC_SPI 98 IRQ_TYPE_LEVEL_LOW>;
clocks = <&ethsys CLK_ETHSYS_HSDMA>;
clock-names = "hsdma";
power-domains = <&scpsys MT2701_POWER_DOMAIN_ETH>;
#dma-cells = <1>;
};
DMA clients must use the format described in dma/dma.txt file.