[PATCH v3 1/3] dt-bindings: dmaengine: Add MediaTek High-Speed DMA controller bindings
From: robh@kernel.org (Rob Herring)
Date: 2018-02-05 06:10:16
Also in:
dmaengine, linux-devicetree, linux-mediatek, lkml
On Thu, Feb 01, 2018 at 11:45:23AM +0800, sean.wang at mediatek.com wrote:
quoted hunk ↗ jump to hunk
From: Sean Wang <sean.wang@mediatek.com> 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> --- .../devicetree/bindings/dma/mtk-hsdma.txt | 33 ++++++++++++++++++++++ 1 file changed, 33 insertions(+) create mode 100644 Documentation/devicetree/bindings/dma/mtk-hsdma.txtdiff --git a/Documentation/devicetree/bindings/dma/mtk-hsdma.txt b/Documentation/devicetree/bindings/dma/mtk-hsdma.txt new file mode 100644 index 0000000..c07c03e --- /dev/null +++ b/Documentation/devicetree/bindings/dma/mtk-hsdma.txt@@ -0,0 +1,33 @@ +MediaTek High-Speed DMA Controller +================================== + +This driver follows the generic DMA bindings defined in dma/dma.txt.
Bindings describe h/w, not drivers.
+
+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: hsdma at 1b007000 {dma-controller at ...
+ compatible = "mediatek,mt7623-hsdma"; + reg = <0 0x1b007000 0 0x1000>; + interrupts = <GIC_SPI 98 IRQ_TYPE_LEVEL_LOW>; + clocks = <ðsys 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. -- 2.7.4