Re: Serial UART on RPi3

[Jason Thorpe <thorpej%me.com@localhost>]

> On Dec 24, 2018, at 11:14 PM, Dustin Marquess <dmarquess%gmail.com@localhost> wrote:
> 
>> You are having the same overlay problem I was having.  It's likely the .dtb files on your image were not built correctly.  At least in -current, the ones build when you compile a kernel are built with -@ option passed to dtc, which provides the necessary symbol table in the .dtb file or the Broadcom loader to process the overlay.
>> 
>> You can confirm this by running "dtc -O dts /boot/bcm2837-rpi-3-b.dtb" and looking for the symbol table (I guess it should be near the end of the output).
>> 
>> Try copying the .dtb files from the kernel compile directory when you built your kernel into /boot.
> 
> Ah, that helps, thanks.  I was using the images from
> http://www.invisible.ca/arm/ .  I just did a refresh rebuild of
> current and indeed the .dtb files match now.

That's good to hear.  I'm not sure why Jared's images have these slightly broken .dtb files.  Hopefully he's reading this thread and can fix his image building process.

-- thorpej