What is AMA in /dev/ttyAMA0

[gjs]

I have connected an RS232 (MAX3232) adapter to the UART via the GPIO pins and it's working fine after I followed some instructions to get the console off of tty0. However, I've ended up with the port on ttyAMA0. My question is, what does the AMA stand for? Much googling has yielded nothing.

Thanks.

[AndrewS]

The driver used for the RPi's UART: http://lxr.free-electrons.com/source/dr ... 11.c#L1891
Looks like "AMA" is short for AMBA http://www.arm.com/products/system-ip/a ... ations.php
https://en.wikipedia.org/wiki/Advanced_ ... chitecture
Aren't you glad you asked?

[gjs]

Thanks Andrew. Yes, I'm so glad I asked!

So it seems this is the name of a bus on the SOC, presumably the bus that the UART hangs off of. Fascinating!

[AndrewS]

For even more info, have a look at http://elinux.org/Rpi_Low-level_peripherals and the chipset datasheet it links to, and search for 'amba' on http://lists.infradead.org/pipermail/li ... 00027.html