linux-kernel - Re: [PATCH v3] ARM: dts: Add support for Liebherr's BK4 device (vf610 based)

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Date:   Wed, 5 Dec 2018 21:12:46 -0200
From:   Fabio Estevam <festevam@...il.com>
To:     Lukasz Majewski <lukma@...x.de>, Rob Herring <robh+dt@...nel.org>
Cc:     Shawn Guo <shawnguo@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        Sascha Hauer <kernel@...gutronix.de>,
        Stefan Agner <stefan@...er.ch>,
        Fabio Estevam <fabio.estevam@....com>
Subject: Re: [PATCH v3] ARM: dts: Add support for Liebherr's BK4 device (vf610 based)

Hi Lukasz/Rob,

On Tue, Oct 9, 2018 at 7:50 AM Lukasz Majewski <lukma@...x.de> wrote:

> +&dspi3 {
> +       pinctrl-names = "default";
> +       pinctrl-0 = <&pinctrl_dspi3>;
> +       bus-num = <3>;
> +       status = "okay";
> +       spi-slave;
> +
> +       slave@0 {
> +               compatible = "lwn,bk4";
> +               spi-max-frequency = <30000000>;
> +               reg = <0>;
> +       };
> +};

This is causing the following dtc warning in linux-next:

  DTC     arch/arm/boot/dts/vf610-bk4.dtb
arch/arm/boot/dts/vfxxx.dtsi:550.24-563.6: Warning (spi_bus_bridge):
/soc/aips-bus@...80000/spi@...ad000: incorrect #address-cells for SPI
bus
  also defined at arch/arm/boot/dts/vf610-bk4.dts:106.8-118.3
arch/arm/boot/dts/vf610-bk4.dtb: Warning (spi_bus_reg): Failed
prerequisite 'spi_bus_bridge'

If spi-slave property is removed the warning is gone.

Looking at drivers/spi/spi-fsl-dspi.c I don't see the "spi-slave"
property being handled there.

Any ideas on how to fix this?

Thanks