tree 4374c214378c40e6952b2e8aa26889d5b1d2c94f
parent 663461b9144e21b3fb0de92c886b63254964429a
author Andre Przywara <andre.przywara@arm.com> 1621005235 +0100
committer Andre Przywara <andre.przywara@arm.com> 1636045596 +0000

fix(arm_fpga): Change PL011 UART IRQ

About a year ago there was a change in the underlying Arm platform design
framework, which lead to a reorganisation of the interrupt map (to make
room for multi-chip designs).

This lead to the PL011 debug UART interrupt to move from SPI 115 to SPI
415. Unfortunately there is not a good or easy way to auto-detect this
change: Flooding the TX FIFO and checking GICD_ISPENDR registers might
be possible, but sounds a bit over the top for BL31.

So we would need to break one group of images: newer ones, as we do right
now, or older ones.
By now every interesting FPGA image seems to use the newer IRQ, so in
the interest of having a smooth experience for most users, lets switch
to this IRQ.

When people are interested in older images, they can either change the
number back in the .dts file, or provide a patched DTB on the FPGA
command line.

Change-Id: I3c7e7b711f5142813bd94eecde3095a4fc555bb3
Signed-off-by: Andre Przywara <andre.przywara@arm.com>