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 bacbbbe05cf85698bd68aa6c721f815cf64be260..ff6f981ec4c6d6e5ce458e620b5225981a64f90d 100755 (executable)
--- 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);