[PATCH v2] PCI: rcar-gen4: Isolate driver to ARM64

[Bjorn Helgaas]

On Tue, Jul 14, 2026 at 03:19:27PM +0200, Marek Vasut wrote:
> The driver includes linux/irqchip/arm-gic-v3.h which pulls in headers
> which are available only on ARM and ARM64, on other architectures the
> headers are not present and the driver fails to build. This driver is
> used only on ARM64 hardware, isolate its build only to ARM64 to avoid
> build failures on other architectures.
> 
> Reported-by: kernel test robot <lkp at intel.com>
> Closes: https://lore.kernel.org/oe-kbuild-all/202607100310.iQw5m9Uo-lkp@intel.com/
> Signed-off-by: Marek Vasut <marek.vasut+renesas at mailbox.org>

Mani, I assume you'll squash this into 89bded511a66 ("PCI: rcar-gen4:
Configure AXIINTC if iMSI-RX is not used") so it's connected to the
addition of the linux/irqchip/arm-gic-v3.h include and there's no
bisection hole?

> ---
> Cc: "Krzysztof Wilczyński" <kwilczynski at kernel.org>
> Cc: Bjorn Helgaas <bhelgaas at google.com>
> Cc: Catalin Marinas <catalin.marinas at arm.com>
> Cc: Conor Dooley <conor+dt at kernel.org>
> Cc: Geert Uytterhoeven <geert+renesas at glider.be>
> Cc: Krzysztof Kozlowski <krzk+dt at kernel.org>
> Cc: Lorenzo Pieralisi <lpieralisi at kernel.org>
> Cc: Manivannan Sadhasivam <mani at kernel.org>
> Cc: Marc Zyngier <maz at kernel.org>
> Cc: Rob Herring <robh at kernel.org>
> Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh at renesas.com>
> Cc: devicetree at vger.kernel.org
> Cc: linux-arm-kernel at lists.infradead.org
> Cc: linux-doc at vger.kernel.org
> Cc: linux-kernel at vger.kernel.org
> Cc: linux-pci at vger.kernel.org
> Cc: linux-renesas-soc at vger.kernel.org
> ---
> V2: This is a rework of PCI: rcar-gen4: Inline GIC_TRANSLATER offset macro
>     which isolates the driver build to ARM64 via Kconfig instead:
>     https://lore.kernel.org/linux-pci/CAMuHMdVvWE7YZgKvreSn_vJLOVD4eMmn3TCGOyqSXksqjBCwvg@mail.gmail.com/
>     https://lore.kernel.org/linux-pci/20260714110041.GA1349622@bhelgaas/
> ---
>  drivers/pci/controller/dwc/Kconfig | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/pci/controller/dwc/Kconfig b/drivers/pci/controller/dwc/Kconfig
> index 49a7a2c50ca15..3260d916110b2 100644
> --- a/drivers/pci/controller/dwc/Kconfig
> +++ b/drivers/pci/controller/dwc/Kconfig
> @@ -346,7 +346,7 @@ config PCIE_RCAR_GEN4
>  
>  config PCIE_RCAR_GEN4_HOST
>  	tristate "Renesas R-Car Gen4 PCIe controller (host mode)"
> -	depends on ARCH_RENESAS || COMPILE_TEST
> +	depends on ARM64 && (ARCH_RENESAS || COMPILE_TEST)
>  	depends on PCI_MSI
>  	select PCIE_DW_HOST
>  	select PCIE_RCAR_GEN4
> @@ -357,7 +357,7 @@ config PCIE_RCAR_GEN4_HOST
>  
>  config PCIE_RCAR_GEN4_EP
>  	tristate "Renesas R-Car Gen4 PCIe controller (endpoint mode)"
> -	depends on ARCH_RENESAS || COMPILE_TEST
> +	depends on ARM64 && (ARCH_RENESAS || COMPILE_TEST)
>  	depends on PCI_ENDPOINT
>  	select PCIE_DW_EP
>  	select PCIE_RCAR_GEN4
> -- 
> 2.53.0
>