Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6

[pandora-kernel.git] / arch / arm / mach-mxs / clock-mx23.c

diff --git a/arch/arm/mach-mxs/clock-mx23.c b/arch/arm/mach-mxs/clock-mx23.c
index d133c7f..c3577ea 100644 (file)
--- a/arch/arm/mach-mxs/clock-mx23.c
+++ b/arch/arm/mach-mxs/clock-mx23.c
@@ -521,6 +521,15 @@ static int clk_misc_init(void)
        __raw_writel(BM_CLKCTRL_CPU_INTERRUPT_WAIT,
                        CLKCTRL_BASE_ADDR + HW_CLKCTRL_CPU_SET);
 
+       /*
+        * 480 MHz seems too high to be ssp clock source directly,
+        * so set frac to get a 288 MHz ref_io.
+        */
+       reg = __raw_readl(CLKCTRL_BASE_ADDR + HW_CLKCTRL_FRAC);
+       reg &= ~BM_CLKCTRL_FRAC_IOFRAC;
+       reg |= 30 << BP_CLKCTRL_FRAC_IOFRAC;
+       __raw_writel(reg, CLKCTRL_BASE_ADDR + HW_CLKCTRL_FRAC);
+
        return 0;
 }
 
@@ -528,6 +537,12 @@ int __init mx23_clocks_init(void)
 {
        clk_misc_init();
 
+       /*
+        * source ssp clock from ref_io than ref_xtal,
+        * as ref_xtal only provides 24 MHz as maximum.
+        */
+       clk_set_parent(&ssp_clk, &ref_io_clk);
+
        clk_enable(&cpu_clk);
        clk_enable(&hbus_clk);
        clk_enable(&xbus_clk);