NanoPi R6S - usb flashing under Linux
I can't seem to get the open source 'rkdeveloptool' to boot the device.
(it can discover it in maskrom mode, but cannot successfully boot it)
The binary blob 'upgrade_tool' can do that part, but I'm not very trusting of running random binaries... (though I've managed to run it in a pretty tight jail)
However, trying to read the eMMC seems to only ever give me at most 1MiB at a time...
Ultimately I'd like to get a raw mainline kernel/initramfs on to this with gadget mode.
It appears using Linux (instead of Windows) makes this hard... and wanting to avoid using extra flash devices/sd cards adds extra complexity.
I kind of thought I'd be able to just read/write the disk and/or boot a kernel/initramfs, but the serial console connector comes unsoldered (why oh why...)
I guess I'm just venting... I'll probably figure it out eventually...