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Date:   Sun, 31 Mar 2019 01:41:36 -0500
From:   Rob Herring <robh@...nel.org>
To:     qiaozhou <qiaozhou@...micro.com>
Cc:     Mark Rutland <mark.rutland@....com>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/7] dt-bindings: serial: add ASR8751C serial bindings

On Sat, Mar 23, 2019 at 10:01:25PM +0800, qiaozhou wrote:
> From: Qiao Zhou <qiaozhou@...micro.com>
> 
> Add binding documentation for ASR8751C serial device.
> 
> Signed-off-by: qiaozhou <qiaozhou@...micro.com>
> ---
>  .../devicetree/bindings/serial/asr-serial.txt      | 23 ++++++++++++++++++++++
>  1 file changed, 23 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/serial/asr-serial.txt
> 
> diff --git a/Documentation/devicetree/bindings/serial/asr-serial.txt b/Documentation/devicetree/bindings/serial/asr-serial.txt
> new file mode 100644
> index 0000000..9e0e191
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/serial/asr-serial.txt
> @@ -0,0 +1,23 @@
> +* UART Controller of ASR8751C SoCs
> +
> +Required properties:
> +- compatible : should be "asr,uart"

Needs an SoC specific compatible.

> +- reg: iomem address and length of uart registers
> +- interrupts : Should be the interrupt number
> +- clocks: clock required by uart
> +- clock-frequency: frequency of clock source
> +- dmas: dma channel used by uart tx or rx
> +- dma-names: dma name of uart tx or rx
> +
> +Example:
> +
> +	uart0: uart@...17000 {
> +		compatible = "asr,uart";
> +		reg = <0xd4017000 0x1000>;
> +		interrupts = <0 32 0x4>;
> +		clock-frequency = <13000000>;
> +		dmas = <&pdma0 AP_UART0_RX 1
> +			&pdma0 AP_UART0_TX 1>;
> +		dma-names = "rx", "tx";
> +		clocks = <&soc_clocks ASR_CLK_UART0>;
> +	};
> -- 
> 2.7.4
> 

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