diff --git a/arch/arm/mach-rk2928/pm.c b/arch/arm/mach-rk2928/pm.c
index e524a7ca2bcd..a50dccba0827 100644
--- a/arch/arm/mach-rk2928/pm.c
+++ b/arch/arm/mach-rk2928/pm.c
@@ -281,6 +281,7 @@ static void __sramfunc rk2928_sram_suspend(void)
 	u32 cru_clksel0_con;
 	u32 clkgt_regs[CRU_CLKGATES_CON_CNT];
 	int i;
+ 	u32 grf_uoc1_con;
 
 	sram_printch('5');
 	ddr_suspend();
@@ -290,7 +291,8 @@ static void __sramfunc rk2928_sram_suspend(void)
 	board_pmu_suspend();
 	sram_printch('7');
 
-
+        grf_uoc1_con = grf_readl(GRF_UOC1_CON4);
+        grf_writel(0x30000000,GRF_UOC1_CON4);
 	for (i = 0; i < CRU_CLKGATES_CON_CNT; i++) {
 		clkgt_regs[i] = cru_readl(CRU_CLKGATES_CON(i));
 	}
@@ -337,6 +339,7 @@ static void __sramfunc rk2928_sram_suspend(void)
 		cru_writel(clkgt_regs[i] | 0xffff0000, CRU_CLKGATES_CON(i));
 	}
 
+	grf_writel(0x30000000|grf_uoc1_con,GRF_UOC1_CON4);
 	sram_printch('7');
 	board_pmu_resume();
 	rk30_pwm_logic_resume_voltage();