clk: Skip fetching index for single parent clocks

We don't need to fetch the parent index for clocks if they only
have one parent. Doing this also avoid an unnecessary allocation
for the parent cache.

Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Michael Turquette <mturquette@linaro.org>

diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index d48ac71c6c8b173793a31e95ebaa93749e883a76..7f25aaf2a2b093720dc8590021ac7b131e7a331c 100644 (file)
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -1390,7 +1390,7 @@ static struct clk *clk_calc_new_rates(struct clk *clk, unsigned long rate)
        }
 
        /* try finding the new parent index */
-       if (parent) {
+       if (parent && clk->num_parents > 1) {
                p_index = clk_fetch_parent_index(clk, parent);
                if (p_index < 0) {
                        pr_debug("%s: clk %s can not be parent of clk %s\n",