From: Chen-Yu Tsai <wens@csie.org>
Date: Sat, 28 Jan 2017 12:22:32 +0000 (+0800)
Subject: clk: sunxi-ng: mux: Get closest parent rate possible with CLK_SET_RATE_PARENT
X-Git-Tag: v4.11-rc1~71^2~12^2~5
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=82aab516ec96ab9f9ad4b80a0bab9368b1cd5cdc;p=platform%2Fkernel%2Flinux-exynos.git

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
--- 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);