So yeah, back on getting all of that friendlyarm nanopi duo2 supported again. Want a newer kernel to get the bluetooth stuff in, but not interested in trying to port openwrt forwards (yet?) Instead, build your own kernel as per: http://linux-sunxi.org/Mainline_Kernel_Howto and build openwrt as normal. (well… normal, but add this patch to skip a manual step: https://github.com/karlp/openwrt/commit/6438d22e98df353afe2635667b7dc29c97bd1196 )
Now, make sure you _BUILT IN_ any kernel modules you want, because we aint doin no module installation and loading bullshit.
And then just…. fel load it, as per http://linux-sunxi.org/FEL/USBBoot#Booting_the_whole_system_over_USB_.28U-Boot_.2B_kernel_.2B_initramfs.29
$ sunxi-fel uboot u-boot-sunxi-with-spl.bin write-with-progress 0x42000000 /home/karlp/src/linux-git/arch/arm/boot/zImage write-with-progress 0x43300000 /home/karlp/src/openwrt-git/bin/targets/sunxi/cortexa7/openwrt-sunxi-cortexa7-sun8i-h3-nanopi-duo2-iotbox-rootfs.uboot write 0x43000000 ~/src/linux-git/arch/arm/boot/dts/sun8i-h3-nanopi-duo2-iotbox.dtb write 0x43100000 my-fel-bootz.scr
100% [================================================] 5229 kB, 842.6 kB/s
100% [================================================] 13228 kB, 845.3 kB/s
$ cat my-fel-bootz.cmd
setenv bootargs console=ttyS0,115200 console=ttyGS0,115200 earlyprintk root=/dev/ram0
bootz $kernel_addr_r $ramdisk_addr_r $fdt_addr_r
$And presto. ramdisk from openwrt rootfs as root, upstream kernel of whatever you like.
Shitty blog post, but saving this for next time so I don’t lose it again.
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