[PATCH 02/16] clk: sunxi-ng: Add common infrastructure

[Jean-Francois Moine]

On Sun, 15 May 2016 20:31:22 +0200
Maxime Ripard <maxime.ripard at free-electrons.com> wrote:

> > > +void ccu_helper_wait_for_lock(struct ccu_common *common, u32 lock)
> > > +{
> > > +       u32 reg;
> > > +
> > > +       if (!(common->features & CCU_FEATURE_LOCK))
> > > +               return;
> > > +
> > > +       WARN_ON(readl_relaxed_poll_timeout(common->base + common->reg, reg,
> > > +                                          !(reg & lock), 0, 500));
> > 
> >                                     no delay between reads? ^
> 
> Yes, I intended it to be a simple busy waiting loop since I don't
> expect it to be very long. Do yu have any more data on how much time
> it usually takes?

I have a Soc in which the rate of the audio clock is stable after a
good second.

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