linux-kernel - Re: [PATCH v2] arm64: defconfig: Enable R-Car PCIe endpoint driver

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Date:   Wed, 12 Aug 2020 11:03:09 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Cc:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, Arnd Bergmann <arnd@...db.de>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        Prabhakar <prabhakar.csengg@...il.com>,
        Kishon Vijay Abraham I <kishon@...com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        linux-pci <linux-pci@...r.kernel.org>
Subject: Re: [PATCH v2] arm64: defconfig: Enable R-Car PCIe endpoint driver

Hi Prabhakar,

CC PCI endpoint people

On Tue, Aug 11, 2020 at 4:04 PM Lad Prabhakar
<prabhakar.mahadev-lad.rj@...renesas.com> wrote:
> Enable R-Car PCIe endpoint driver on RZ/G2E board, including enabling
> endpoint configurations CONFIG_PCI_ENDPOINT, CONFIG_PCI_ENDPOINT_CONFIGFS,
> CONFIG_PCI_EPF_TEST and CONFIG_PCI_ENDPOINT_TEST required to use and test
> the driver.
>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> ---
> v1->v2
> * Made CONFIG_PCI_EPF_TEST and CONFIG_PCI_ENDPOINT_TEST as modules

Thanks for the update!

Reviewed-by: Geert Uytterhoeven <geert+renesas@...der.be>
i.e. will queue in renesas-devel for v5.10.

However, as no core PCI code seems to depend on CONFIG_PCI_ENDPOINT, I
would like to request the PCI endpoint people to consider making all PCI
endpoint support tristate, so we can revisit this change to the arm64
defconfig later.

Thanks!

> --- a/arch/arm64/configs/defconfig
> +++ b/arch/arm64/configs/defconfig
> @@ -208,6 +208,7 @@ CONFIG_HOTPLUG_PCI_ACPI=y
>  CONFIG_PCI_AARDVARK=y
>  CONFIG_PCI_TEGRA=y
>  CONFIG_PCIE_RCAR_HOST=y
> +CONFIG_PCIE_RCAR_EP=y
>  CONFIG_PCI_HOST_GENERIC=y
>  CONFIG_PCI_XGENE=y
>  CONFIG_PCIE_ALTERA=y
> @@ -224,6 +225,9 @@ CONFIG_PCIE_ARMADA_8K=y
>  CONFIG_PCIE_KIRIN=y
>  CONFIG_PCIE_HISI_STB=y
>  CONFIG_PCIE_TEGRA194_HOST=m
> +CONFIG_PCI_ENDPOINT=y
> +CONFIG_PCI_ENDPOINT_CONFIGFS=y
> +CONFIG_PCI_EPF_TEST=m
>  CONFIG_DEVTMPFS=y
>  CONFIG_DEVTMPFS_MOUNT=y
>  CONFIG_FW_LOADER_USER_HELPER=y
> @@ -254,6 +258,7 @@ CONFIG_BLK_DEV_NBD=m
>  CONFIG_VIRTIO_BLK=y
>  CONFIG_BLK_DEV_NVME=m
>  CONFIG_SRAM=y
> +CONFIG_PCI_ENDPOINT_TEST=m
>  CONFIG_EEPROM_AT24=m
>  CONFIG_EEPROM_AT25=m
>  CONFIG_UACCE=m

Gr{oetje,eeting}s,

                        Geert


--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds