Slo-mo Linux?

[Nick Burkitt]

I switched from my previous method of building the snickerdoodle device tree to using the snickerdoodle-dts git repo (with many modifications). I managed to get a DTB that mostly works with a bitstream built with Vivado 2017.4, but there are some issues. The most bizarre is that Linux's idea of time now runs at 1/2 real time. That is, a bash command of "sleep 1" will return after two seconds. Other things seem to run at 1/2 speed as well.

How the heck did I do that? And how do I make it stop?

Thanks,

-Nick

[Nick Burkitt]

Here's some background info: https://forums.xilinx.com/t5/Embedded-Linux/ZYNQ-Dynamic-frequency-scaling-and-pll-bypass-under-linux/m-p/555741/highlight/true#M11593. I've worked around the issue by hand-editing an old device tree, but I really don't understand why it behaves as it does.