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Joachim Wiberg
35ba2ca37f
The Raspberry Pi 400 shares hardware with the RPi 4B but differs in one important way: it has an internal keyboard and mouse connected through a VIA Labs USB hub on the VL805 xHCI controller. Break the symlink to raspberrypi,4-model-b and maintain a dedicated product directory. Factory config changes from the 4B default: - USB1/USB2/USB3 all unlocked: USB2 carries the internal keyboard hub and USB3 the superspeed companion; all are unlocked as this is a desktop device - DHCP vendor-class corrected to "Raspberry Pi 400" Also add interface-quirks.json for the eth0 PHY detach behaviour and the smsc95xx broken flow-control quirk (inherited from the 4B config but now explicit), and remove the spurious bootable flag from the primary and secondary rootfs partitions in genimage.cfg.in. Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
Board Support
The board support for an architecture always starts with Qemu support,
this is what each linux_defconfig at the very least sets up. Then
each $BR2_ARCH has additional BSPs, e.g., Banana Pi BPI-R3.
The board/ directory is matched with the configs/*_defconfigs and
the only execption is board/common/, which holds all shared files for
Infix builds.
Each board/$BR2_ARCH/ can then have vendor/product sub-directories
for the BSPs which may contain "fixups" to the base kernel config and
any additional device tree files that should be included as well.
To rebuild a board-specific package, e.g. NanoPi R2S:
make friendlyarm-nanopi-r2s-rebuild all