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

[Fabio Estevam]

Hi Lukasz/Rob,

On Tue, Oct 9, 2018 at 7:50 AM Lukasz Majewski <lukma@xxxxxxx> 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@40080000/spi@400ad000: 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