linux-kernel - [PATCH] clk: qcom: Use parent rate when set rate to pixel RCG clock

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Message-Id: <1435271733-24455-1-git-send-email-hali@codeaurora.org>
Date:	Thu, 25 Jun 2015 18:35:33 -0400
From:	Hai Li <hali@...eaurora.org>
To:	linux-kernel@...r.kernel.org, sboyd@...eaurora.org
Cc:	mturquette@...aro.org, georgi.djakov@...aro.org,
	tomeu.vizoso@...labora.com, architt@...eaurora.org,
	Hai Li <hali@...eaurora.org>
Subject: [PATCH] clk: qcom: Use parent rate when set rate to pixel RCG clock

Since the parent rate has been recalculated, pixel RCG clock
should rely on it to find the correct M/N values during set_rate,
instead of calling __clk_round_rate() to its parent again.

Signed-off-by: Hai Li <hali@...eaurora.org>
---
 drivers/clk/qcom/clk-rcg2.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/clk/qcom/clk-rcg2.c b/drivers/clk/qcom/clk-rcg2.c
index 4d3e2f7..b344899 100644
--- a/drivers/clk/qcom/clk-rcg2.c
+++ b/drivers/clk/qcom/clk-rcg2.c
@@ -615,10 +615,11 @@ static int clk_pixel_set_rate(struct clk_hw *hw, unsigned long rate,
 	if (!parent)
 		return -EINVAL;
 
+	src_rate = parent_rate;
+
 	for (; frac->num; frac++) {
 		request = (rate * frac->den) / frac->num;
 
-		src_rate = __clk_round_rate(parent, request);
 		if ((src_rate < (request - delta)) ||
 			(src_rate > (request + delta)))
 			continue;
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
hosted by The Linux Foundation

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