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clk: propagate round_rate for CLK_SET_RATE_PARENT case 

Need to propagate round_rate call for the clk that has no .round_rate
operation but with flag CLK_SET_RATE_PARENT set.

For example, clk_mux is a clk with no .round_rate operation.  However,
it could likely be in a clk_set_rate propagation path, saying it has
parent clk who has .round_rate and .set_rate operations.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
This commit is contained in:
Shawn Guo 2012-04-12 20:50:19 +08:00 committed by Mike Turquette
parent 1c0035d710
commit f4d8af2e5a
1 changed files with 6 additions and 2 deletions
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8
drivers/clk/clk.c
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@ -587,8 +587,12 @@ unsigned long __clk_round_rate(struct clk *clk, unsigned long rate)
if (!clk)
return -EINVAL;
if (!clk->ops->round_rate)
return clk->rate;
if (!clk->ops->round_rate) {
if (clk->flags & CLK_SET_RATE_PARENT)
return __clk_round_rate(clk->parent, rate);
else
return clk->rate;
}
if (clk->parent)
parent_rate = clk->parent->rate;