[PATCH-V5 3/3] ARM: OMAP: Make OMAP clocksource source selection using kernel param

Hiremath, Vaibhav hvaibhav at ti.com
Thu Apr 26 12:40:19 EDT 2012


On Thu, Apr 26, 2012 at 20:40:34, Paul Walmsley wrote:
> Hi
> 
> a question
> 
> On Wed, 25 Apr 2012, Vaibhav Hiremath wrote:
> 
<snip>
> > +
> > +	sync32k_ick = clk_get(NULL, "omap_32ksync_ick");
> > +	if (!IS_ERR(sync32k_ick))
> > +		clk_enable(sync32k_ick);
> 
> You've added hwmod data for this IP block, which is good.  This will 
> presumably cause the IP block to be idled on boot.  But you haven't 
> converted this code to use either the hwmod enable code -- just using 
> clk_get() isn't enough.  (Better would be to use a driver and the PM 
> runtime functions, of course, but maybe this runs too early?)
> 
> If the 32k sync timer is in OCP force-idle, then that might produce the 
> hangs you're seeing.
> 

I tried disabling all idle related flags in hwmod entry but no change in 
observation, kernel still hangs.

I even conformed the register content by connecting debugger, and it is set 
to No-idle state.

Thanks,
Vaibhav



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