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sh: clkfwk: Provide a generic clk_set_rate_ex() path for root clocks.

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In the case of root clocks (such as clkin oscillators, extal, etc.), the
rate information is entirely platform dependent and needs to be lazily
set and propagated from the platform code. This provides a method for
establishing the rate update on these types of clocks that define no
set_rate() op of their own.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2009-05-13 17:05:51 +09:00
parent d672fef027
commit 100890c55e
1 changed files with 16 additions and 9 deletions
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25
arch/sh/kernel/cpu/clock.c
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@ -265,20 +265,27 @@ EXPORT_SYMBOL_GPL(clk_set_rate);
int clk_set_rate_ex(struct clk *clk, unsigned long rate, int algo_id) int clk_set_rate_ex(struct clk *clk, unsigned long rate, int algo_id)
{ {
int ret = -EOPNOTSUPP; int ret = -EOPNOTSUPP;
unsigned long flags;
spin_lock_irqsave(&clock_lock, flags);
if (likely(clk->ops && clk->ops->set_rate)) { if (likely(clk->ops && clk->ops->set_rate)) {
unsigned long flags;
spin_lock_irqsave(&clock_lock, flags);
ret = clk->ops->set_rate(clk, rate, algo_id); ret = clk->ops->set_rate(clk, rate, algo_id);
if (ret == 0) { if (ret != 0)
if (clk->ops->recalc) goto out_unlock;
clk->rate = clk->ops->recalc(clk); } else {
propagate_rate(clk); clk->rate = rate;
} ret = 0;
spin_unlock_irqrestore(&clock_lock, flags);
} }
if (clk->ops && clk->ops->recalc)
clk->rate = clk->ops->recalc(clk);
propagate_rate(clk);
out_unlock:
spin_unlock_irqrestore(&clock_lock, flags);
return ret; return ret;
} }
EXPORT_SYMBOL_GPL(clk_set_rate_ex); EXPORT_SYMBOL_GPL(clk_set_rate_ex);