sunxi-fel: nanopi duo2 – latest kernel + openwrt rootfs

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: and build openwrt as normal. (well… normal, but add this patch to skip a manual step: )

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

$ 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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