Messages in this thread | | | Date | Fri, 3 Jul 2015 16:47:47 +0530 | From | Viresh Kumar <> | Subject | Re: [PATCH 39/41] clocksource: vf_pit: Migrate to new 'set-state' interface |
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On 03-07-15, 13:11, Stefan Agner wrote: > On 2015-07-03 10:57, Viresh Kumar wrote: > > On 03-07-15, 10:10, Stefan Agner wrote: > >> > .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT, > >> > - .set_mode = pit_set_mode, > >> > + .set_state_shutdown = pit_shutdown, > >> > + .set_state_periodic = pit_set_periodic, > >> > >> I'm not really familiar with the interface, but given that we announce > >> the feature CLOCK_EVT_FEAT_ONESHOT shouldn't we add a set_state_oneshot > >> callback here? > > > > We weren't doing anything in pit_set_mode(ONESHOT) and so that > > callback is not implemented. In case you need to do something in > > set_state_oneshot(), we can add it back. > > True, weren't doing anything. I wonder if that is right. Afaik, we > should set the same timer for oneshot too, hence call > pit_set_next_event. With your change we can just reuse the same function > (pit_set_periodic) for set_state_oneshot.
pit_set_next_event() will be called by clockevents core directly after tying to set the device in oneshot mode. And so no changes are required.
> To maintain the atomicity of the changes, this would need to be fixed in > a separate patch anyway. So this change looks good to me: > > Acked-by: Stefan Agner <stefan@agner.ch>
Thanks.
> I guess "clockevents: Allow set-state callbacks to be optional" makes it > before this patch? Otherwise we would call a null pointer...
Yeah, I have mentioned this in the cover-letter that there are dependencies over clockevent core's next branch.
-- viresh
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