[neo core 2 Focal is 404]

It seems the links to download the new Focal build for the nanopi neo core 2 are dead.

 

https://www.armbian.com/nanopi-neo-core-2-lts/

 

Neither direct nor torrent seem to be working.

[broken symlinks in linux-source-5.1.0-dev-sunxi]

I see that now. Thanks.

[broken symlinks in linux-source-5.1.0-dev-sunxi]

when unpacked to the home directory:

user@nanopiair:~/linux-source-5.1.0-sunxi$ find . -xtype l
./debian/hdrtmp/lib/modules/5.1.0-sunxi64/build
./drivers/net/wireless/rtl8812au/include
./drivers/net/wireless/rtl8812au/platform
./drivers/net/wireless/rtl8812au/hal
./drivers/net/wireless/rtl8812au/os_dep
./drivers/net/wireless/rtl8812au/modules.order
./drivers/net/wireless/rtl8812au/core
./net/wireguard/tools/wg-quick/wg

 

Didn't stop me from doing what I needed. All the rtl8812au symlinks point to

 

/home/igorp/samsung/cache/sources/rtl8812au/*

 

[Working USB OTG on NanoPi Neo Core2 LTS and NanoPi Neo Air]

Fair enough. I'm not too worried though, as the long term solution really needs to be folding this into the Armbian or upstream kernel sources so that it builds with the system as a whole. This is just a bandaid for people who want USB OTG right now.

[Working USB OTG on NanoPi Neo Core2 LTS and NanoPi Neo Air]

I've got a NanoPi Neo Core 2 and a NanoPi Neo Air. It bothered me that the USB OTG did not function in host mode. Turns out, the included Armbian .dtb's don't have the parts necessary to define the regulator which pushes power back to a client device when the board needs to run in OTG host mode. You can see the regulator on page 8 of the schematic

 

http://wiki.friendlyarm.com/wiki/images/6/6b/NanoPi_NEO_Core2-V1.0_1707.pdf

 

I found an upstream patch at

 

https://patchwork.kernel.org/patch/9921097/

 

which defined the missing parts for a Neo Plus 2. I put the relevant parts into an overlay dts file (attached) that can be loaded with

 

sudo armbian-add-overlay otg.dts

 

I've tested this on both of my devices. I assume it should work on other devices with the same wiring.

 

One quirk I didn't figure out though... online sources all used "GPIO_ACTIVE_HIGH" as a kind of defined value, but the version of 'dtc' included with Armbian chokes on it. So instead I just in the equivalent numeric value.

otg.dts