On 12/01/2016 07:15 AM, Ralf Ramsauer wrote:
Hi,
I observed that touching MMIO regions of Tegra devices with its
corresponding clock gate deactivated immediately freezes the whole
system. No kernel panic, nothing.
I tested this behavior with a small kernel module, find it attached. A
few seconds after loading this module, the whole device freezes. Tested
this on a TK1 and TX1.
Unfortunately, this is indeed the way the HW works.
What is the actual expected behavior on ARM(64) when touching ungated
MMIO regions? Is it specified somewhere?
I don't believe the ARM architecture specifies behaviour in this case,
or if it does, defines it as implementation defined, which means that
pretty much any behaviour is valid.
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