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SubjectRe: [PATCH v3 1/3] dt-bindings: dmaengine: Add MediaTek High-Speed DMA controller bindings
On Thu, Feb 01, 2018 at 11:45:23AM +0800, sean.wang@mediatek.com wrote:
> 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.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..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@1b007000 {

dma-controller@...

> + 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.
> --
> 2.7.4
>

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