Re: [PATCH v5 10/11] arch: arm: boot: dts: Introduce HPE GXP Device tree

[Arnd Bergmann]

On Thu, Apr 21, 2022 at 9:21 PM <nick.hawkins@xxxxxxx> wrote:

> +       axi {
> +               compatible = "simple-bus";
> +               #address-cells = <1>;
> +               #size-cells = <1>;
> +               ranges;
> +               dma-ranges;
> +
> +               ahb@c0000000 {
> +                       compatible = "simple-bus";
> +                       #address-cells = <1>;
> +                       #size-cells = <1>;
> +                       ranges = <0x0 0xc0000000 0x30000000>;

I think you should add a "dma-ranges" property in the ahb node as well,
otherwise this would mean that none of the children are DMA capable,
when at the minimum the USB controllers require DMA.

       Arnd