[patch] initial perf_event support for Raspberry-Pi
swarren at wwwdotorg.org
Wed Feb 12 00:04:08 EST 2014
On 12/31/2013 02:54 PM, Vince Weaver wrote:
> The following patch enables performance counter support on Raspberry-Pi.
> We have this working on the 2708 based rasp-pi kernels by manually putting
> the device registration in the platform files.
> This change does things properly in a device tree. The boot messages look
> proper, but my rasp-pi hangs somewhere in USB enabling when running a
> stock 3.13-rc6 kernel so I have been unable to fully test this change.
> I also understand that the rasp-pi 1176 pmu support is missing the
> overflow interrupt. I'm not sure if that's true of all 2835
> implementations. If not, then this patch will need to be changed a bit.
I've applied this to bcm2835's for-3.15/dt branch, with minor fixes.
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