From: chenxing <chenxing@rock-chips.com>
Date: Wed, 6 Nov 2013 01:32:49 +0000 (+0800)
Subject: rk3026: i2s add several attempts to double confirm i2s frac effect
X-Git-Tag: firefly_0821_release~6507
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=baf73f765d8cba3aacf1e4b015fa11afcbb14896;p=firefly-linux-kernel-4.4.55.git

rk3026: i2s add several attempts to double confirm i2s frac effect
---

diff --git a/arch/arm/mach-rk3026/clock_data.c b/arch/arm/mach-rk3026/clock_data.c
index bacbbbe05cf8..ff6f981ec4c6 100755
--- a/arch/arm/mach-rk3026/clock_data.c
+++ b/arch/arm/mach-rk3026/clock_data.c
@@ -1687,12 +1687,18 @@ static struct clk clk_i2s_pll = {
 static int i2s_fracdiv_set_rate(struct clk *clk, unsigned long rate)
 {
 	u32 numerator, denominator;
+	int i = 10;
 	//clk_i2s_div->clk_i2s_pll->gpll/cpll
 	//clk->parent->parent
 	if (frac_div_get_seting(rate, clk->parent->parent->rate,
 				&numerator, &denominator) == 0) {
 		clk_set_rate_nolock(clk->parent, clk->parent->parent->rate); //PLL:DIV 1:
-		cru_writel_frac(numerator << 16 | denominator, clk->clksel_con);
+		while (i--) {
+			cru_writel_frac((numerator - 1) << 16 | denominator, clk->clksel_con);
+			mdelay(1);
+			cru_writel_frac(numerator << 16 | denominator, clk->clksel_con);
+			mdelay(1);
+		}
 		CLKDATA_DBG("%s set rate=%lu,is ok\n", clk->name, rate);
 	} else {
 		CLKDATA_DBG("clk_frac_div can't get rate=%lu,%s\n", rate, clk->name);