On Sat, Jun 07, 2014 at 04:34:34PM +0200, Gilles Chanteperdrix wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > On 06/06/2014 04:00 PM, Maxime Ripard wrote: > > On Fri, Jun 06, 2014 at 03:59:12PM +0200, Maxime Ripard wrote: > >> Hi Gilles, > >> > >> I've been experimenting these days with the i-pipe 3.14 kernel, > >> and current xenomai master branch on the Atmel SAMA5D3 SoC. > >> > >> There's a few issues there, the first one being that > >> at91_ipipe_early_init crashes because of a NULL pointer > >> dereference. This is due to the clk_get_rate call on the clock > >> returned by clk_get(NULL, "mck"). > >> > >> This clk_get call cannot since 3.14 because the clock code has > >> been rewritten, and you can't use clkdev anymore. > >> > >> This is quite simple to fix, and after actually fixing it, you > >> get a more interesting issue: either the timers or the > >> interrupts don't work at all. > >> > >> The first symptom is that it get stuck at the delay loop > >> calibration. Setting the loops per jiffy in the command line > >> make the boot go further, until the switch to the ipipe_tsc > >> clocksource. This actually makes me think that it's more the > >> timers that are broken rather than the interrupts. Changing the > >> timer counter block doesn't solve anything. > >> > >> Do you have an idea of what could be going on? > > > > > > Actually, the boot seem just to be *much* slower, so maybe the > > timers are working after all, but it's just yet another issue with > > the clocks. > > > Does __ipipe_tsc_update get called in Linux timer interrupt?
Yes, it does. -- Maxime Ripard, Free Electrons Embedded Linux, Kernel and Android engineering http://free-electrons.com -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 819 bytes Desc: Digital signature URL: <http://www.xenomai.org/pipermail/xenomai/attachments/20140610/74ed7cfb/attachment.sig> _______________________________________________ Xenomai mailing list [email protected] http://www.xenomai.org/mailman/listinfo/xenomai
