diff --git a/plat/rockchip/rk3399/drivers/pmu/pmu.c b/plat/rockchip/rk3399/drivers/pmu/pmu.c
index 3631a30..05ca7fd 100644
--- a/plat/rockchip/rk3399/drivers/pmu/pmu.c
+++ b/plat/rockchip/rk3399/drivers/pmu/pmu.c
@@ -1150,7 +1150,6 @@
 	 * 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();
@@ -1173,7 +1172,6 @@
 	/* PWM regulators take time to come up; give 300us to be safe. */
 	udelay(300);
 	enable_dvfs_plls();
-	plls_resume_finish();
 
 	secure_watchdog_restore();
 
diff --git a/plat/rockchip/rk3399/drivers/soc/soc.c b/plat/rockchip/rk3399/drivers/soc/soc.c
index f77b74f..c769b73 100644
--- a/plat/rockchip/rk3399/drivers/soc/soc.c
+++ b/plat/rockchip/rk3399/drivers/soc/soc.c
@@ -214,20 +214,6 @@
 		      WMSK_BIT(PCLK_WDT_CM0_GATE_SHIFT));
 }
 
-static void pll_suspend_prepare(uint32_t pll_id)
-{
-	int i;
-
-	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));
-}
-
 static void set_pll_slow_mode(uint32_t pll_id)
 {
 	if (pll_id == PPLL_ID)
@@ -361,23 +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;
@@ -431,26 +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 bbca7bc..742bb7b 100644
--- a/plat/rockchip/rk3399/drivers/soc/soc.h
+++ b/plat/rockchip/rk3399/drivers/soc/soc.h
@@ -348,10 +348,8 @@
 void __dead2 soc_global_soft_reset(void);
 void secure_watchdog_disable();
 void secure_watchdog_restore();
-void plls_suspend_prepare(void);
 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);