hrtimers with ARM architected timer

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Hi,

I'm new to rt-linux, so please forgive me if I ask some dumb questions.
I have searched for a while, but not found what I am looking for.

I'm trying out the rt-linux patches (v4.9.35) on an out-of-tree BSP for
a new ARM Cortex A7 device. When I tried cyclictest, it complained that
I don't have High Resolution timers, so I checked and sure enough
/proc/timer_list showed the timer resolution is 10ms. I've checked my
kernel config and I have enabled hrtimers.

This device uses the ARM architected timer (CONFIG_ARM_ARCH_TIMER)
running at a lowly 6.25MHz.

So, how can I tell if a driver is supposed to support hrtimers?
If the ARM architected timer driver does support hrtimers, what could
stop them being used?

Thanks
Phil
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