From: Sean Wang <sean.wang@xxxxxxxxxxxx>
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@xxxxxxxxxxxx>
---
.../devicetree/bindings/dma/mtk-hsdma.txt | 33 ++++++++++++++++++++++
1 file changed, 33 insertions(+)
create mode 100644 Documentation/devicetree/bindings/dma/mtk-hsdma.txt
diff --git a/Documentation/devicetree/bindings/dma/mtk-hsdma.txt b/Documentation/devicetree/bindings/dma/mtk-hsdma.txt
new file mode 100644
index 0000000..4bb31735
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/mtk-hsdma.txt
@@ -0,0 +1,33 @@
+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 = <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
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