Re: [PATCH v4 04/18] dt-bindings: PCI: rcar-gen4: Add optional "aer" interrupt for R-Car Gen4 SoCs

[Rob Herring (Arm)]

On Thu, 15 Oct 2026 12:30:49 +0900, Koichiro Den wrote:
> The intreq_pcim_lperr interrupt carries Root Port AER notifications,
> separately from the integrated MSI receiver interrupt. Describe it with
> the "aer" name so the controller driver can use it for Root Port error
> reporting.
> 
> Keep the fifth interrupt optional on R-Car Gen4 SoCs so existing device
> trees remain valid. Extend the example accordingly.
> 
> Signed-off-by: Koichiro Den <den@xxxxxxxxxxxxx>
> ---
> Changes since v3:
>   - Rebase on Marek's Gen5 AER binding fix:
>     https://lore.kernel.org/r/20261003215710.792518-1-marek.vasut+renesas@xxxxxxxxxxx/
>     This requires "aer" for the Gen5 SoC PCIe4 controller from the
>     beginning. Update the subject to clarify that it is optional only
>     on Gen4 SoCs, for compatibility with existing DTs.
>   - Drop R-b tags due to the changes.
> 
> v3: https://lore.kernel.org/r/20261006084638.3821710-5-den@xxxxxxxxxxxxx/
> 
>  .../devicetree/bindings/pci/rcar-gen4-pci-host.yaml | 13 ++++++++++---
>  1 file changed, 10 insertions(+), 3 deletions(-)
> 

Reviewed-by: Rob Herring (Arm) <robh@xxxxxxxxxx>