From: Chen-Yu Tsai <wens@csie.org>
Date: Sat, 28 Jan 2017 12:22:31 +0000 (+0800)
Subject: clk: sunxi-ng: mux: honor CLK_SET_RATE_NO_REPARENT flag
X-Git-Tag: v4.11-rc1~71^2~12^2~6
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=216abdcc3ae7b1dbe145f1e78cf727b6832db9b4;p=platform%2Fkernel%2Flinux-exynos.git

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 eb66adb..d0d69c7 100644
--- 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;