Commit 023bd716 authored Feb 26, 2016 by Shawn Lin Committed by Stephen Boyd Feb 25, 2016

clk: skip unnecessary set_phase if nothing to do



Let's compare the degrees from clk_set_rate with
clk->core->phase. If the requested degrees is already
there, skip the following steps.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
[sboyd@codeaurora.org: s/drgrees/degrees/ in commit text]
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>

parent 2103a215

drivers/clk/clk.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -1841,6 +1841,10 @@ int clk_set_phase(struct clk *clk, int degrees)

		clk_prepare_lock();

		/* bail early if nothing to do */
		if (degrees == clk->core->phase)
		goto out;

		trace_clk_set_phase(clk->core, degrees);

		if (clk->core->ops->set_phase)
		@@ -1851,6 +1855,7 @@ int clk_set_phase(struct clk *clk, int degrees)
		if (!ret)
		clk->core->phase = degrees;

		out:
		clk_prepare_unlock();

		return ret;