linux-kernel - Re: [PATCH v5 12/12] arm64: dts: ls1028a-rdb: Add a spidev node for the mikroBUS

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Message-ID: <20200420143831.GB32419@dragon>
Date:   Mon, 20 Apr 2020 22:38:32 +0800
From:   Shawn Guo <shawnguo@...nel.org>
To:     Vladimir Oltean <olteanv@...il.com>
Cc:     broonie@...nel.org, linux-spi@...r.kernel.org,
        linux-kernel@...r.kernel.org, robh+dt@...nel.org,
        mark.rutland@....com, devicetree@...r.kernel.org, eha@...f.com,
        angelo@...am.it, andrew.smirnov@...il.com, gustavo@...eddedor.com,
        weic@...dia.com, mhosny@...dia.com, michael@...le.cc,
        peng.ma@....com
Subject: Re: [PATCH v5 12/12] arm64: dts: ls1028a-rdb: Add a spidev node for
 the mikroBUS

On Wed, Mar 18, 2020 at 02:16:03AM +0200, Vladimir Oltean wrote:
> From: Vladimir Oltean <vladimir.oltean@....com>
> 
> For debugging, it is useful to have access to the DSPI controller
> signals. On the reference design board, these are exported to either the
> mikroBUS1 or mikroBUS2 connector (according to the CPLD register
> BRDCFG3[SPI3]).
> 
> Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>
> ---
> Changes in v5:
> None.
> 
> Changes in v4:
> None.
> 
> Changes in v3:
> None.
> 
> Changes in v2:
> Change compatible string for spidev node.
> 
>  arch/arm64/boot/dts/freescale/fsl-ls1028a-rdb.dts | 14 ++++++++++++++
>  1 file changed, 14 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1028a-rdb.dts b/arch/arm64/boot/dts/freescale/fsl-ls1028a-rdb.dts
> index 6d05b76c2c7a..0d27b5667b8c 100644
> --- a/arch/arm64/boot/dts/freescale/fsl-ls1028a-rdb.dts
> +++ b/arch/arm64/boot/dts/freescale/fsl-ls1028a-rdb.dts
> @@ -83,6 +83,20 @@
>  	};
>  };
>  
> +&dspi2 {
> +	bus-num = <2>;
> +	status = "okay";
> +
> +	/* mikroBUS1 */
> +	spidev@0 {
> +		compatible = "rohm,dh2228fv";

Is the compatible documented?

Shawn

> +		spi-max-frequency = <20000000>;
> +		fsl,spi-cs-sck-delay = <100>;
> +		fsl,spi-sck-cs-delay = <100>;
> +		reg = <0>;
> +	};
> +};
> +
>  &esdhc {
>  	sd-uhs-sdr104;
>  	sd-uhs-sdr50;
> -- 
> 2.17.1
>