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

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Date:   Thu, 3 Jan 2019 17:21:44 -0600
From:   Rob Herring <robh@...nel.org>
To:     h00249924 <hutenghui@...wei.com>
Cc:     dmaengine@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        suzhuangluan@...ilicon.com, kongfei@...ilicon.com,
        liyuequan@...ilicon.com, cash.qianli@...ilicon.com,
        huangli295@...ilicon.com, hantanglei@...wei.com,
        wangyoulin1@...ilicon.com, ninggaoyu@...ilicon.com,
        hanxiaolong3@...ilicon.com,
        Youlin Wang <wwx575822@...esmail.huawei.com>,
        Vinod Koul <vkoul@...nel.org>,
        Mark Rutland <mark.rutland@....com>
Subject: Re: [PATCH 2/3] dmaengine: Extend the k3dma driver binding

On Fri, Dec 28, 2018 at 02:36:22PM +0800, h00249924 wrote:
> From: Youlin Wang <wwx575822@...esmail.huawei.com>
> 
> Extend the k3dma driver binding to support hisi-asp hardware variants.
> 
> Signed-off-by: Youlin Wang <wwx575822@...esmail.huawei.com>
> Signed-off-by: Tanglei Han <hantanglei@...wei.com>
> Cc: Vinod Koul <vkoul@...nel.org>
> Cc: Rob Herring <robh+dt@...nel.org>
> Cc: Mark Rutland <mark.rutland@....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@...4B000 {
> +			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
>