clk: sunxi-ng: mux: Get closest parent rate possible with CLK_SET_RATE_PARENT

If the CLK_SET_RATE_PARENT flag is set, we want to try getting the
closest parent rate.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

diff --git a/drivers/clk/sunxi-ng/ccu_mux.c b/drivers/clk/sunxi-ng/ccu_mux.c
index d0d69c7..c6bb1f5 100644 (file)
--- a/drivers/clk/sunxi-ng/ccu_mux.c
+++ b/drivers/clk/sunxi-ng/ccu_mux.c
@@ -93,7 +93,18 @@ int ccu_mux_helper_determine_rate(struct ccu_common *common,
                if (!parent)
                        continue;
 
-               parent_rate = clk_hw_get_rate(parent);
+               if (clk_hw_get_flags(hw) & CLK_SET_RATE_PARENT) {
+                       struct clk_rate_request parent_req = *req;
+                       int ret = __clk_determine_rate(parent, &parent_req);
+
+                       if (ret)
+                               continue;
+
+                       parent_rate = parent_req.rate;
+               } else {
+                       parent_rate = clk_hw_get_rate(parent);
+               }
+
                adj_parent_rate = parent_rate;
                ccu_mux_helper_adjust_parent_for_prediv(common, cm, i,
                                                        &adj_parent_rate);