Re: [PATCH v3 1/3] dt-bindings: dmaengine: Add MediaTek High-Speed DMA controller bindings

[Rob Herring]

On Thu, Feb 01, 2018 at 11:45:23AM +0800, sean.w...@mediatek.com wrote:
> From: Sean Wang <sean.w...@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.w...@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
>