Let's compare the degrees from clk_set_rate with clk->core->phase. If the requested drgrees is already there, skip the following steps.
Signed-off-by: Shawn Lin <[email protected]> --- drivers/clk/clk.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index b4db67a..549fdb8 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -1902,6 +1902,10 @@ 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) @@ -1912,6 +1916,7 @@ int clk_set_phase(struct clk *clk, int degrees) if (!ret) clk->core->phase = degrees; +out: clk_prepare_unlock(); return ret; -- 2.3.7
