[PATCH v2 10/10] config: Enable support for the XHCI controller on RPI4 board

[Bin Meng]

On Mon, May 4, 2020 at 8:45 PM Sylwester Nawrocki
<s.nawrocki at samsung.com> wrote:
>
> From: Marek Szyprowski <m.szyprowski at samsung.com>
>
> This requires enabling BRCMSTB PCIe and XHCI_PCI drivers as well as PCI
> and USB commands. To get it working one has to call the following commands:
> "pci enum; usb start;", thus such commands have been added to the default
> "preboot" environment variable. One has to update their environment if it
> is already configured to get this feature working out of the box.
>
> Signed-off-by: Marek Szyprowski <m.szyprowski at samsung.com>
> Signed-off-by: Sylwester Nawrocki <s.nawrocki at samsung.com>
> ---
> Changes since v1:
>  - removed unneeded CONFIG_XHCI_64BIT_DWORD_ACCESS_ONLY entry.
>
> Changes since RFC:
>  - none.
> ---
>  configs/rpi_4_32b_defconfig | 9 +++++++++
>  configs/rpi_4_defconfig     | 9 +++++++++
>  configs/rpi_arm64_defconfig | 8 +++++++-
>  3 files changed, 25 insertions(+), 1 deletion(-)
>

What are these 3 defconfigs files for? Seems there is no MAINTAINERS
mentioning them.

I assume rpi_4_32b_defconfig is for 32-bit U-Boot and rpi_4_defconfig
is for 64-bit U-Boot for RPi 4? What is rpi_arm64_defconfig?

Regards,
Bin