linux-kernel - Re: [PATCH v3 2/2] arm64: dts: Add ds26522 node to dts to ls1043ardb

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Date:   Fri, 22 May 2020 14:38:47 -0500
From:   Li Yang <leoyang.li@....com>
To:     Qiang Zhao <qiang.zhao@....com>
Cc:     Shawn Guo <shawnguo@...nel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>, lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 2/2] arm64: dts: Add ds26522 node to dts to ls1043ardb

On Tue, May 19, 2020 at 11:08 PM Qiang Zhao <qiang.zhao@....com> wrote:
>
> From: Zhao Qiang <qiang.zhao@....com>

Maybe remove the duplicated dts in the title?

>
> Add ds26522 node to fsl-ls1043a-rdb.dts
>
> Signed-off-by: Zhao Qiang <qiang.zhao@....com>
> ---
> v3:
>  - use "arm64: dts:" format for subject
>
> arch/arm64/boot/dts/freescale/fsl-ls1043a-rdb.dts | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1043a-rdb.dts b/arch/arm64/boot/dts/freescale/fsl-ls1043a-rdb.dts
> index 44d9343..1cb265f 100644
> --- a/arch/arm64/boot/dts/freescale/fsl-ls1043a-rdb.dts
> +++ b/arch/arm64/boot/dts/freescale/fsl-ls1043a-rdb.dts
> @@ -94,6 +94,22 @@
>                 reg = <0>;
>                 spi-max-frequency = <1000000>; /* input clock */
>         };
> +
> +       slic@2 {

If this is a plugin card for the board, will this cause any problem
when the card is not plugged in?

> +               compatible = "maxim,ds26522";
> +               reg = <2>;
> +               spi-max-frequency = <2000000>;
> +               fsl,spi-cs-sck-delay = <100>;
> +               fsl,spi-sck-cs-delay = <50>;
> +       };
> +
> +       slic@3 {
> +               compatible = "maxim,ds26522";
> +               reg = <3>;
> +               spi-max-frequency = <2000000>;
> +               fsl,spi-cs-sck-delay = <100>;
> +               fsl,spi-sck-cs-delay = <50>;
> +       };
>  };
>
>  &duart0 {
> --
> 2.7.4
>