On Thu, May 21, 2015 at 11:46:53PM +0800, Fu Wei wrote:
Hi Guenter,
[ ... ]
/** Try to determine the frequency from the arch_timer interface*/clk = arch_timer_get_rate();arch_timer_get_rate() does not seem to be exported. Did you try to build the driver as module ?
yes, I have built it as a ko module, that is why I made a patch to export this interface in the first patch of this patchset
but I will confirm it again :-)
Guess I'll give it a try myself. I don't really understand how this can work unless arch_timer_get_rate() is exported in your tree.
yes, I have exported it , I think it make sense to export it. Because other driver maybe need to get system counter info
Do you agree ? :-)
I don't think it is for me to agree or not. The arm maintainers will need to be involved. You can not just export such a function without maintainer Ack.
Having said that, my personal preference would be for the counter and rate to be exported through the clock subsystem (ie with clk_get_rate). But that would still not provide the current counter value, so maybe that isn't even possible.
Thanks, Guenter