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Joachim Wiberg
9b057ad547
The BCM2837 core is used not just in the RPi 3B but also in the Zero 2W, both device trees have been added to the board config. The BCM2711 support has been extended to include RPi 400 and CM4 I/O. To support the BCM2837 family more firmware options habe been enabled, since the RPi3 does not have bootcode.bin flashed in the SoC. The SD card image now uses a hybrid GPT/MBR format so the RPi3 bootcode.bin can read all files from the first VFAT partition. The default device tree for Linux is now chosen by the U-Boot probe and the only exception is the "laundry room" detector that looks for a RPi4 with a 7" touch screen, which then selects the DSI enabled RPi4 variant. This is enough to properly load an RPi 3B and a CM4 based router board. The BCM2837 does not have PCI/PCIe or a built-in MAC so it relies on the USB to Ethernet LAN78xx which does not support disabling pause frames. I have opted for checking for EOPNOTSUPP instead of adding yet another quirk, because it is likely to be a common limitation of more drivers and chipsets, and this code is best-effort anyway. Signed-off-by: Joachim Wiberg <troglobit@gmail.com>