Re: [PATCH 2/3] dmaengine: Extend the k3dma driver binding

Rob Herring
2019-01-03T23:21:59Z

On Fri, Dec 28, 2018 at 02:36:22PM +0800, h00249924 wrote:
> From: Youlin Wang <wwx575822@notesmail.huawei.com>
>
> Extend the k3dma driver binding to support hisi-asp hardware variants.
>
> Signed-off-by: Youlin Wang <wwx575822@notesmail.huawei.com>
> Signed-off-by: Tanglei Han <hantanglei@huawei.com>
> Cc: Vinod Koul <vkoul@kernel.org>
> Cc: Rob Herring <robh+dt@kernel.org>
> Cc: Mark Rutland <mark.rutland@arm.com>
> ---
> Documentation/devicetree/bindings/dma/k3dma.txt | 33 ++++++++++++++++++++++++-
> 1 file changed, 32 insertions(+), 1 deletion(-)
>
> diff --git a/Documentation/devicetree/bindings/dma/k3dma.txt b/Documentation/devicetree/bindings/dma/k3dma.txt
> index 4945aea..cd21b82 100644
> --- a/Documentation/devicetree/bindings/dma/k3dma.txt
> +++ b/Documentation/devicetree/bindings/dma/k3dma.txt
> @@ -3,7 +3,9 @@
> See dma.txt first
>
> Required properties:
> -- compatible: Should be "hisilicon,k3-dma-1.0"
> +- compatible: Must be one of
> +- "hisilicon,k3-dma-1.0"
> +- "hisilicon,hisi-pcm-asp-dma-1.0"
> - reg: Should contain DMA registers location and length.
> - interrupts: Should contain one interrupt shared by all channel
> - #dma-cells: see dma.txt, should be 1, para number
> @@ -43,3 +45,32 @@ For example, i2c0 read channel request line is 18, while write channel use 19
> dma-names = "rx", "tx";
> };
>
> +
> +
> +
> +Controller:

Why is a new example needed just for a new compatible string?

> + asp_dmac: asp_dmac@E804B000 {
> + compatible = "hisilicon,hisi-pcm-asp-dma-1.0";
> + reg = <0x0 0xe804b000 0x0 0x1000>;
> + #dma-cells = <1>;
> + dma-channels = <16>;
> + dma-requests = <32>;
> + dma-min-chan = <0>;
> + dma-used-chans = <0xFFFE>;
> + dma-share;
> + interrupts = <0 216 4>;
> + interrupt-names = "asp_dma_irq";
> + status = "ok";
> + };
> +
> +Client:
> + i2s2: hisi_i2s {
> + compatible = "hisilicon,hisi-i2s";
> + reg = <0x0 0xe804f800 0x0 0x400>,
> + <0x0 0xe804e000 0x0 0x400>;
> + pinctrl-names = "default";
> + pinctrl-0 = <&i2s2_pmx_func &i2s2_cfg_func>;
> + dmas = <&asp_dmac 18 &asp_dmac 19>;
> + dma-names = "rx", "tx";
> + #sound-dai-cells = <0>;
> + };
> --
> 1.9.1