clk: sunxi-ng: mux: honor CLK_SET_RATE_NO_REPARENT flag

This patch adds support for the CLK_SET_RATE_NO_REPARENT flag to the
mux determine_rate helper, based on examples from clk-composite and
clk-mux.

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 eb66adb28807ae50e9d55f0ed56a1c0231bd687b..d0d69c7eb516f9679989201c9f8824e5b2b43efe 100644 (file)
--- a/drivers/clk/sunxi-ng/ccu_mux.c
+++ b/drivers/clk/sunxi-ng/ccu_mux.c
@@ -70,6 +70,21 @@ int ccu_mux_helper_determine_rate(struct ccu_common *common,
        struct clk_hw *best_parent, *hw = &common->hw;
        unsigned int i;
 
+       if (clk_hw_get_flags(hw) & CLK_SET_RATE_NO_REPARENT) {
+               unsigned long adj_parent_rate;
+
+               best_parent = clk_hw_get_parent(hw);
+               best_parent_rate = clk_hw_get_rate(best_parent);
+
+               adj_parent_rate = best_parent_rate;
+               ccu_mux_helper_adjust_parent_for_prediv(common, cm, -1,
+                                                       &adj_parent_rate);
+
+               best_rate = round(cm, adj_parent_rate, req->rate, data);
+
+               goto out;
+       }
+
        for (i = 0; i < clk_hw_get_num_parents(hw); i++) {
                unsigned long tmp_rate, parent_rate, adj_parent_rate;
                struct clk_hw *parent;