[PATCH 0/4] Fix RP1 DeviceTree hierarchy and drop overlay support

[Florian Fainelli]

On 12/18/25 11:09, Andrea della Porta wrote:
> The current RP1 implementation is plagued by several issues, as follows:
> 
> - the node name for RP1 is too specific and should be generic instead
>    (see [1]).
> 
> - the fully defined DTS has its PCI hierarchy wrongly described. There
>    should be a PCI root port between the root complex and the endpoint
>    (see [1]).
> 
> - since CONFIG_PCI_DYNAMIC_OF_NODES can be dropped in the future
>    becoming an automatically enabled feature, it would be wise to not
>    depend on it (see [2]).
> 
> - overlay support has led to a lot of confusion. It's not really usable
>    right now and users are not even used to it (see [3]).
> 
> This patch aims at solving the aforementioned problems by amending the
> PCI topology as follows:
> 
>    ...
>    pcie at 1000120000 {
>      ...
> 
>      pci at 0,0 {
>        device_type = "pci";
>        reg = <0x00 0x00 0x00 0x00 0x00>;
>        ...
> 
>        dev at 0,0 {
>          compatible = "pci1de4,1";
>          reg = <0x10000 0x00 0x00 0x00 0x00>;
>          ...
> 
>          pci-ep-bus at 1 {
>            compatible = "simple-bus";
>            ...
> 
>            /* peripherals child nodes */
>          };
>        };
>      };
>    };
> 
> The reg property is important since it permits the binding the OF
> device_node structure to the pci_dev, encoding the BDF in the upper
> portion of the address.
> 
> This patch also drops the overlay support in favor of the fully
> described DT while streamlining it as a result.

Timing could not have been better as I was just going to apply Rob's patch:

https://lore.kernel.org/all/20251211193854.1778221-1-robh@kernel.org

Yours is definitively more complete. Rob, Krzysztof, can you review this 
series and I will fast track it today.

Thanks!
-- 
Florian