Orange Pi 5 Pro stuff

Booting/partitions:

    While it has a place for SPI flash onboard it's unpopulated by default so that eMMC can be used instead.

    To boot from a uSD card, used the following partition scheme:
        1 fat32, start: 32mib,  end: 288mib (256mib) - enable lba (type 0c in fdisk)
        2 ext4,  start: 288mib, end: 100%

    To install u-boot on the uSD card, built it from the orangepi-build repo and used dd like so:
        # dd if=idbloader.img of=/dev/sdb seek=64 conv=notrunc status=none
        # dd if=u-boot.itb of=/dev/sdb seek=16384 conv=notrunc status=none

    Note the seek=16384 (8M) for the u-boot.itb image, needed some room for u-boot before the first partition. 32mib was maybe a little overkill but it works.
    These offsets came from the platform_install.sh script built by the u-boot build process in orangepi-build.

Kernel:
    Used 6.1.99 kernel build from orangepi-build (https://github.com/orangepi-xunlong/orangepi-build) next branch in a docker container

Wireless:
    Needed 2 firmware files from here: https://github.com/paralin/ap6256-firmware/tree/master
        fw_bcm43456c5_ag.bin
        nvram_ap6256.txt
    Installed in /lib/firmware



fdisk -l /dev/mmcblk1:
----------
Disk /dev/mmcblk1: 29.81 GiB, 32010928128 bytes, 62521344 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x3def0e2e

Device         Boot  Start      End  Sectors  Size Id Type
/dev/mmcblk1p1       65536   589823   524288  256M  c W95 FAT32 (LBA)
/dev/mmcblk1p2      589824 62521343 61931520 29.5G 83 Linux
----------



parted /dev/mmcblk1 unit s print:
----------
Model: SD 00000 (sd/mmc)
Disk /dev/mmcblk1: 62521344s
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags: 

Number  Start    End        Size       Type     File system  Flags
 1      65536s   589823s    524288s    primary  fat32        lba
 2      589824s  62521343s  61931520s  primary  ext4
----------



/boot/extlinux/extlinux.conf:
----------
default l0

menu title U-Boot menu
prompt 1
timeout 50
label l0
  menu label CRUX-ARM Orange Pi 5 Pro 6.1.99-rockchip-rk3588 (uSD)
  kernel /vmlinuz-6.1.99-rockchip-rk3588
  fdt /dtb-6.1.99-rockchip-rk3588/rockchip/rk3588s-orangepi-5-pro.dtb
  append console=tty1 console=ttyFIQ0,1500000 earlyprintk root=/dev/mmcblk1p2 rootwait
----------