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-rw-r--r--arch/arm/mach-mx5/clock-mx51-mx53.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/arm/mach-mx5/clock-mx51-mx53.c b/arch/arm/mach-mx5/clock-mx51-mx53.c
index 6b89c1bf4eb..0856482f376 100644
--- a/arch/arm/mach-mx5/clock-mx51-mx53.c
+++ b/arch/arm/mach-mx5/clock-mx51-mx53.c
@@ -271,7 +271,11 @@ static int _clk_pll_enable(struct clk *clk)
int i = 0;
pllbase = _get_pll_base(clk);
- reg = __raw_readl(pllbase + MXC_PLL_DP_CTL) | MXC_PLL_DP_CTL_UPEN;
+ reg = __raw_readl(pllbase + MXC_PLL_DP_CTL);
+ if (reg & MXC_PLL_DP_CTL_UPEN)
+ return 0;
+
+ reg |= MXC_PLL_DP_CTL_UPEN;
__raw_writel(reg, pllbase + MXC_PLL_DP_CTL);
/* Wait for lock */