Messages in this thread | | | Date | Mon, 6 Jul 2015 13:45:05 +0900 | Subject | Re: Possible regression due to "tick: broadcast: Prevent livelock from event handler" | From | Magnus Damm <> |
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Hi Geert,
On Sat, Jul 4, 2015 at 2:02 AM, Geert Uytterhoeven <geert@linux-m68k.org> wrote: > Hi Wolfram, > > On Fri, Jul 3, 2015 at 4:37 PM, Wolfram Sang <wsa@the-dreams.de> wrote: >>> So this is a single core machine and uses the em_sti timer w/o the >>> broadcast nonsense. In Simons case it looks like em_sti is used as >>> broadcast device. >> >> We use the same board. Just my kernel has SMP=n. > > Unlike our other multi-core A9 SoCs, emev2.dtsi doesn't have a node > for the arm,cortex-a9-twd-timer?
That's right, the TWD was never enabled on upstream EMEV2. I believe it is documented in the data sheet though, however the actual vendor-specific glue is a bit different compared to other SoCs from Renesas Electronics - this most likely since EMEV2 was initially made by NEC Electronics instead of Renesas. I've been told that it was one of the earlier Cortex-A9 designs around so some special surprises may exist!
Cheers,
/ magnus
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