Re: [PATCH] OMAP3 clock: disable DPLL autoidle while waiting for DPLL to lock

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On Fri, 21 Nov 2008, Kevin Hilman wrote:

> Tony Lindgren <tony@xxxxxxxxxxx> writes:
> 
> > * Paul Walmsley <paul@xxxxxxxxx> [081114 09:46]:
> >> 
> >> During _omap3_noncore_dpll_lock(), if a DPLL has no active downstream
> >> clocks and DPLL autoidle is enabled, the DPLL may never lock, since it
> >> will enter autoidle immediately.  To resolve this, disable DPLL
> >> autoidle while locking the DPLL, and unconditionally wait for the DPLL
> >> to lock.  This fixes some bugs where the kernel would hang when returning
> >> from retention or return the wrong rate for the DPLL.
> >> 
> >> This patch is a collaboration with Peter de Schrijver 
> >> <peter.de-schrijver@xxxxxxxxx> and Kevin Hilman 
> >> <khilman@xxxxxxxxxxxxxxxxxxx>.
> >
> > Pushing to l-o tree today.
> >
> 
> Actually, I think Tero and Paul have a different fix for this now,
> which is what I've included in the latest PM branch.
> 
> Tero can you send the updated version of you "Fix a bug with noncore
> dpll rate calculation" patch?

No, this patch is still valid, and still should be pushed.  The 
calculation patch fixes a separate bug.


- Paul
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