diff --git a/plat/rockchip/rk3399/drivers/pmu/pmu.c b/plat/rockchip/rk3399/drivers/pmu/pmu.c
index 5a385cb..05ca7fd 100644
--- a/plat/rockchip/rk3399/drivers/pmu/pmu.c
+++ b/plat/rockchip/rk3399/drivers/pmu/pmu.c
@@ -1144,11 +1144,12 @@
 	}
 	mmio_setbits_32(PMU_BASE + PMU_PWRDN_CON, BIT(PMU_SCU_B_PWRDWN_EN));
 
+	secure_watchdog_disable();
+
 	/*
 	 * Disabling PLLs/PWM/DVFS is approaching WFI which is
 	 * the last steps in suspend.
 	 */
-	plls_suspend_prepare();
 	disable_dvfs_plls();
 	disable_pwms();
 	disable_nodvfs_plls();
@@ -1171,7 +1172,8 @@
 	/* PWM regulators take time to come up; give 300us to be safe. */
 	udelay(300);
 	enable_dvfs_plls();
-	plls_resume_finish();
+
+	secure_watchdog_restore();
 
 	/* restore clk_ddrc_bpll_src_en gate */
 	mmio_write_32(CRU_BASE + CRU_CLKGATE_CON(3),
diff --git a/plat/rockchip/rk3399/drivers/soc/soc.c b/plat/rockchip/rk3399/drivers/soc/soc.c
index 9529cb2..c769b73 100644
--- a/plat/rockchip/rk3399/drivers/soc/soc.c
+++ b/plat/rockchip/rk3399/drivers/soc/soc.c
@@ -192,18 +192,26 @@
 /* pll suspend */
 struct deepsleep_data_s slp_data;
 
-static void pll_suspend_prepare(uint32_t pll_id)
+void secure_watchdog_disable(void)
 {
-	int i;
+	slp_data.sgrf_con[3] = mmio_read_32(SGRF_BASE + SGRF_SOC_CON3_7(3));
 
-	if (pll_id == PPLL_ID)
-		for (i = 0; i < PLL_CON_COUNT; i++)
-			slp_data.plls_con[pll_id][i] =
-				mmio_read_32(PMUCRU_BASE + PMUCRU_PPLL_CON(i));
-	else
-		for (i = 0; i < PLL_CON_COUNT; i++)
-			slp_data.plls_con[pll_id][i] =
-				mmio_read_32(CRU_BASE + CRU_PLL_CON(pll_id, i));
+	/* disable CA53 wdt pclk */
+	mmio_write_32(SGRF_BASE + SGRF_SOC_CON3_7(3),
+		      BITS_WITH_WMASK(WDT_CA53_DIS, WDT_CA53_1BIT_MASK,
+				      PCLK_WDT_CA53_GATE_SHIFT));
+	/* disable CM0 wdt pclk */
+	mmio_write_32(SGRF_BASE + SGRF_SOC_CON3_7(3),
+		      BITS_WITH_WMASK(WDT_CM0_DIS, WDT_CM0_1BIT_MASK,
+				      PCLK_WDT_CM0_GATE_SHIFT));
+}
+
+void secure_watchdog_restore(void)
+{
+	mmio_write_32(SGRF_BASE + SGRF_SOC_CON3_7(3),
+		      slp_data.sgrf_con[3] |
+		      WMSK_BIT(PCLK_WDT_CA53_GATE_SHIFT) |
+		      WMSK_BIT(PCLK_WDT_CM0_GATE_SHIFT));
 }
 
 static void set_pll_slow_mode(uint32_t pll_id)
@@ -339,23 +347,6 @@
 	restore_pll(DPLL_ID, slp_data.plls_con[DPLL_ID]);
 }
 
-void plls_suspend_prepare(void)
-{
-	uint32_t i, pll_id;
-
-	for (pll_id = ALPLL_ID; pll_id < END_PLL_ID; pll_id++)
-		pll_suspend_prepare(pll_id);
-
-	for (i = 0; i < CRU_CLKSEL_COUNT; i++)
-		slp_data.cru_clksel_con[i] =
-			mmio_read_32(CRU_BASE + CRU_CLKSEL_CON(i));
-
-	for (i = 0; i < PMUCRU_CLKSEL_CONUT; i++)
-		slp_data.pmucru_clksel_con[i] =
-			mmio_read_32(PMUCRU_BASE +
-				     PMUCRU_CLKSEL_OFFSET + i * REG_SIZE);
-}
-
 void clk_gate_con_save(void)
 {
 	uint32_t i = 0;
@@ -409,26 +400,6 @@
 	set_pll_normal_mode(pll_id);
 }
 
-void plls_resume_finish(void)
-{
-	int i;
-
-	for (i = 0; i < CRU_CLKSEL_COUNT; i++) {
-		/* CRU_CLKSEL_CON96~107 the high 16-bit isb't write_mask */
-		if (i > 95)
-			mmio_write_32((CRU_BASE + CRU_CLKSEL_CON(i)),
-				      slp_data.cru_clksel_con[i]);
-		else
-			mmio_write_32((CRU_BASE + CRU_CLKSEL_CON(i)),
-				      REG_SOC_WMSK |
-				      slp_data.cru_clksel_con[i]);
-	}
-	for (i = 0; i < PMUCRU_CLKSEL_CONUT; i++)
-		mmio_write_32((PMUCRU_BASE +
-			      PMUCRU_CLKSEL_OFFSET + i * REG_SIZE),
-			      REG_SOC_WMSK | slp_data.pmucru_clksel_con[i]);
-}
-
 /**
  * enable_dvfs_plls - To resume the specific PLLs
  *
diff --git a/plat/rockchip/rk3399/drivers/soc/soc.h b/plat/rockchip/rk3399/drivers/soc/soc.h
index 16897cc..742bb7b 100644
--- a/plat/rockchip/rk3399/drivers/soc/soc.h
+++ b/plat/rockchip/rk3399/drivers/soc/soc.h
@@ -73,6 +73,7 @@
 #define REG_SOC_WMSK			0xffff0000
 #define CLK_GATE_MASK			0x01
 
+#define SGRF_SOC_COUNT		0x17
 #define PMUCRU_GATE_COUNT	0x03
 #define CRU_GATE_COUNT		0x23
 #define PMUCRU_GATE_CON(n)	(0x100 + (n) * 4)
@@ -111,6 +112,7 @@
 	uint32_t cru_clksel_con[CRU_CLKSEL_COUNT];
 	uint32_t cru_gate_con[CRU_GATE_COUNT];
 	uint32_t pmucru_gate_con[PMUCRU_GATE_COUNT];
+	uint32_t sgrf_con[SGRF_SOC_COUNT];
 };
 
 /**************************************************
@@ -173,6 +175,20 @@
 #define TIMER_RMODE		(0x1 << 1)
 
 /**************************************************
+ * secure WDT
+ **************************************************/
+#define WDT_CM0_EN		0x0
+#define WDT_CM0_DIS		0x1
+#define WDT_CA53_EN		0x0
+#define WDT_CA53_DIS		0x1
+
+#define PCLK_WDT_CA53_GATE_SHIFT	8
+#define PCLK_WDT_CM0_GATE_SHIFT		10
+
+#define WDT_CA53_1BIT_MASK	0x1
+#define WDT_CM0_1BIT_MASK	0x1
+
+/**************************************************
  * cru reg, offset
  **************************************************/
 #define CRU_SOFTRST_CON(n)	(0x400 + (n) * 4)
@@ -330,10 +346,10 @@
 
 /* funciton*/
 void __dead2 soc_global_soft_reset(void);
-void plls_suspend_prepare(void);
+void secure_watchdog_disable();
+void secure_watchdog_restore();
 void disable_dvfs_plls(void);
 void disable_nodvfs_plls(void);
-void plls_resume_finish(void);
 void enable_dvfs_plls(void);
 void enable_nodvfs_plls(void);
 void prepare_abpll_for_ddrctrl(void);