Does anyone know which testpoint is for Fel boot?

[Jodiwe]

Hi all,

I'd like to be able to boot my Pinephone using FEL boot without using the SD card. I've had success doing this for a Banana Pi, and a Pine64, so I would like to maybe make this an option for the pinephone as well.

Has anyone figured out which testpoint is the FEL boot pin on the 1.2 board? Did we ever get a proper layout for the 1.2 board?

Thanks!

[Jodiwe]

I figured it out!

I measured each testpoint when the phone was plugged in to find the ones that are ~3V. On startup I then shorted them individually to ground while plugging it into my computer. It's the second testpoint of the 6 next to the radio on the top side of the mainboard.

Here are pictures of the mod I did to make it available from just in the battery cover:




I'm trying to build u-boot at the moment. Wish me luck :-).