linux-kernel - Re: [PATCH 2/2] arm64: dts: fsl-ls1012a-frdm: add spi-uart device

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Date:   Mon, 18 Jan 2021 15:38:09 +0800
From:   Shawn Guo <shawnguo@...nel.org>
To:     Pawel Dembicki <paweldembicki@...il.com>
Cc:     linux-arm-kernel@...ts.infradead.org,
        Yangbo Lu <yangbo.lu@....com>, Li Yang <leoyang.li@....com>,
        Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] arm64: dts: fsl-ls1012a-frdm: add spi-uart device

On Fri, Jan 15, 2021 at 11:16:13AM +0100, Pawel Dembicki wrote:
> This patch adds spi-uart controller  to LS1012A-FRDM board dts.
> Device is equipped in SC16IS740 from NXP.
> 
> Signed-off-by: Pawel Dembicki <paweldembicki@...il.com>
> ---
>  .../boot/dts/freescale/fsl-ls1012a-frdm.dts   | 21 +++++++++++++++++++
>  1 file changed, 21 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1012a-frdm.dts b/arch/arm64/boot/dts/freescale/fsl-ls1012a-frdm.dts
> index 67702667ed8a..9473d16336a2 100644
> --- a/arch/arm64/boot/dts/freescale/fsl-ls1012a-frdm.dts
> +++ b/arch/arm64/boot/dts/freescale/fsl-ls1012a-frdm.dts
> @@ -7,6 +7,7 @@
>   */
>  /dts-v1/;
>  
> +#include <dt-bindings/interrupt-controller/irq.h>
>  #include "fsl-ls1012a.dtsi"
>  
>  / {
> @@ -57,6 +58,26 @@ simple-audio-card,codec {
>  	};
>  };
>  
> +&dspi {
> +	status = "okay";
> +	bus-num = <0>;

Let's end property list with `status`.

> +
> +	serial@0 {
> +		reg = <0>;
> +		compatible = "nxp,sc16is740";

Let's start property list with `compatible`.

> +		spi-max-frequency = <4000000>;
> +		clocks = <&sc16is7xx_clk>;
> +		interrupt-parent = <&gpio1>;
> +		interrupts = <13 IRQ_TYPE_EDGE_FALLING>;
> +
> +		sc16is7xx_clk: sc16is7xx_clk {

clock-sc16is7xx for node name maybe.

Shawn

> +			compatible = "fixed-clock";
> +			#clock-cells = <0>;
> +			clock-frequency = <24000000>;
> +		};
> +	};
> +};
> +
>  &duart0 {
>  	status = "okay";
>  };
> -- 
> 2.25.1
>