diff --git a/drivers/st/clk/stm32mp1_clk.c b/drivers/st/clk/stm32mp1_clk.c
index f8bc5a2..564bd87 100644
--- a/drivers/st/clk/stm32mp1_clk.c
+++ b/drivers/st/clk/stm32mp1_clk.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018-2019, STMicroelectronics - All Rights Reserved
+ * Copyright (C) 2018-2020, STMicroelectronics - All Rights Reserved
  *
  * SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
  */
@@ -1664,28 +1664,26 @@
 
 static void stm32mp1_stgen_config(void)
 {
-	uintptr_t stgen;
 	uint32_t cntfid0;
 	unsigned long rate;
 	unsigned long long counter;
 
-	stgen = fdt_get_stgen_base();
-	cntfid0 = mmio_read_32(stgen + CNTFID_OFF);
+	cntfid0 = mmio_read_32(STGEN_BASE + CNTFID_OFF);
 	rate = get_clock_rate(stm32mp1_clk_get_parent(STGEN_K));
 
 	if (cntfid0 == rate) {
 		return;
 	}
 
-	mmio_clrbits_32(stgen + CNTCR_OFF, CNTCR_EN);
-	counter = (unsigned long long)mmio_read_32(stgen + CNTCVL_OFF);
-	counter |= ((unsigned long long)mmio_read_32(stgen + CNTCVU_OFF)) << 32;
+	mmio_clrbits_32(STGEN_BASE + CNTCR_OFF, CNTCR_EN);
+	counter = (unsigned long long)mmio_read_32(STGEN_BASE + CNTCVL_OFF);
+	counter |= ((unsigned long long)mmio_read_32(STGEN_BASE + CNTCVU_OFF)) << 32;
 	counter = (counter * rate / cntfid0);
 
-	mmio_write_32(stgen + CNTCVL_OFF, (uint32_t)counter);
-	mmio_write_32(stgen + CNTCVU_OFF, (uint32_t)(counter >> 32));
-	mmio_write_32(stgen + CNTFID_OFF, rate);
-	mmio_setbits_32(stgen + CNTCR_OFF, CNTCR_EN);
+	mmio_write_32(STGEN_BASE + CNTCVL_OFF, (uint32_t)counter);
+	mmio_write_32(STGEN_BASE + CNTCVU_OFF, (uint32_t)(counter >> 32));
+	mmio_write_32(STGEN_BASE + CNTFID_OFF, rate);
+	mmio_setbits_32(STGEN_BASE + CNTCR_OFF, CNTCR_EN);
 
 	write_cntfrq((u_register_t)rate);
 
@@ -1695,20 +1693,17 @@
 
 void stm32mp1_stgen_increment(unsigned long long offset_in_ms)
 {
-	uintptr_t stgen;
 	unsigned long long cnt;
 
-	stgen = fdt_get_stgen_base();
+	cnt = ((unsigned long long)mmio_read_32(STGEN_BASE + CNTCVU_OFF) << 32) |
+		mmio_read_32(STGEN_BASE + CNTCVL_OFF);
 
-	cnt = ((unsigned long long)mmio_read_32(stgen + CNTCVU_OFF) << 32) |
-		mmio_read_32(stgen + CNTCVL_OFF);
+	cnt += (offset_in_ms * mmio_read_32(STGEN_BASE + CNTFID_OFF)) / 1000U;
 
-	cnt += (offset_in_ms * mmio_read_32(stgen + CNTFID_OFF)) / 1000U;
-
-	mmio_clrbits_32(stgen + CNTCR_OFF, CNTCR_EN);
-	mmio_write_32(stgen + CNTCVL_OFF, (uint32_t)cnt);
-	mmio_write_32(stgen + CNTCVU_OFF, (uint32_t)(cnt >> 32));
-	mmio_setbits_32(stgen + CNTCR_OFF, CNTCR_EN);
+	mmio_clrbits_32(STGEN_BASE + CNTCR_OFF, CNTCR_EN);
+	mmio_write_32(STGEN_BASE + CNTCVL_OFF, (uint32_t)cnt);
+	mmio_write_32(STGEN_BASE + CNTCVU_OFF, (uint32_t)(cnt >> 32));
+	mmio_setbits_32(STGEN_BASE + CNTCR_OFF, CNTCR_EN);
 }
 
 static void stm32mp1_pkcs_config(uint32_t pkcs)
diff --git a/drivers/st/clk/stm32mp_clkfunc.c b/drivers/st/clk/stm32mp_clkfunc.c
index e87ab1b..8333f6d 100644
--- a/drivers/st/clk/stm32mp_clkfunc.c
+++ b/drivers/st/clk/stm32mp_clkfunc.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2019, STMicroelectronics - All Rights Reserved
+ * Copyright (c) 2017-2020, STMicroelectronics - All Rights Reserved
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -14,8 +14,6 @@
 #include <drivers/st/stm32_gpio.h>
 #include <drivers/st/stm32mp_clkfunc.h>
 
-#define DT_STGEN_COMPAT		"st,stm32-stgen"
-
 /*
  * Get the frequency of an oscillator from its name in device tree.
  * @param name: oscillator name
@@ -169,33 +167,6 @@
 }
 
 /*
- * Get the RCC base address from the device tree
- * @return: RCC address or 0 on error
- */
-uint32_t fdt_rcc_read_addr(void)
-{
-	int node;
-	void *fdt;
-	const fdt32_t *cuint;
-
-	if (fdt_get_address(&fdt) == 0) {
-		return 0;
-	}
-
-	node = fdt_get_rcc_node(fdt);
-	if (node < 0) {
-		return 0;
-	}
-
-	cuint = fdt_getprop(fdt, node, "reg", NULL);
-	if (cuint == NULL) {
-		return 0;
-	}
-
-	return fdt32_to_cpu(*cuint);
-}
-
-/*
  * Read a series of parameters in rcc-clk section in device tree
  * @param prop_name: Name of the RCC property to be read
  * @param array: the array to store the property parameters
@@ -299,33 +270,6 @@
 }
 
 /*
- * Get the stgen base address.
- * @return: address of stgen on success, and NULL value on failure.
- */
-uintptr_t fdt_get_stgen_base(void)
-{
-	int node;
-	const fdt32_t *cuint;
-	void *fdt;
-
-	if (fdt_get_address(&fdt) == 0) {
-		return 0;
-	}
-
-	node = fdt_node_offset_by_compatible(fdt, -1, DT_STGEN_COMPAT);
-	if (node < 0) {
-		return 0;
-	}
-
-	cuint = fdt_getprop(fdt, node, "reg", NULL);
-	if (cuint == NULL) {
-		return 0;
-	}
-
-	return fdt32_to_cpu(*cuint);
-}
-
-/*
  * Get the clock ID of the given node in device tree.
  * @param node: node offset
  * @return: Clock ID on success, and a negative FDT/ERRNO error code on failure.
diff --git a/include/drivers/st/stm32mp_clkfunc.h b/include/drivers/st/stm32mp_clkfunc.h
index 0902f44..c7e0b6e 100644
--- a/include/drivers/st/stm32mp_clkfunc.h
+++ b/include/drivers/st/stm32mp_clkfunc.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2019, STMicroelectronics - All Rights Reserved
+ * Copyright (c) 2017-2020, STMicroelectronics - All Rights Reserved
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -20,14 +20,12 @@
 				     uint32_t dflt_value);
 
 int fdt_get_rcc_node(void *fdt);
-uint32_t fdt_rcc_read_addr(void);
 int fdt_rcc_read_uint32_array(const char *prop_name, uint32_t count,
 			      uint32_t *array);
 int fdt_rcc_subnode_offset(const char *name);
 const fdt32_t *fdt_rcc_read_prop(const char *prop_name, int *lenp);
 bool fdt_get_rcc_secure_status(void);
 
-uintptr_t fdt_get_stgen_base(void);
 int fdt_get_clock_id(int node);
 
 #endif /* STM32MP_CLKFUNC_H */
diff --git a/plat/st/common/include/stm32mp_dt.h b/plat/st/common/include/stm32mp_dt.h
index 44ad820..e3b4e59 100644
--- a/plat/st/common/include/stm32mp_dt.h
+++ b/plat/st/common/include/stm32mp_dt.h
@@ -34,11 +34,7 @@
 int dt_get_node(struct dt_node_info *info, int offset, const char *compat);
 int dt_get_stdout_uart_info(struct dt_node_info *info);
 uint32_t dt_get_ddr_size(void);
-uintptr_t dt_get_ddrctrl_base(void);
-uintptr_t dt_get_ddrphyc_base(void);
-uintptr_t dt_get_pwr_base(void);
 uint32_t dt_get_pwr_vdd_voltage(void);
-uintptr_t dt_get_syscfg_base(void);
 const char *dt_get_board_model(void);
 int fdt_get_gpio_bank_pin_count(unsigned int bank);
 
diff --git a/plat/st/common/stm32mp_common.c b/plat/st/common/stm32mp_common.c
index 48a747c..89d8078 100644
--- a/plat/st/common/stm32mp_common.c
+++ b/plat/st/common/stm32mp_common.c
@@ -39,54 +39,22 @@
 
 uintptr_t stm32mp_ddrctrl_base(void)
 {
-	static uintptr_t ddrctrl_base;
-
-	if (ddrctrl_base == 0) {
-		ddrctrl_base = dt_get_ddrctrl_base();
-
-		assert(ddrctrl_base == DDRCTRL_BASE);
-	}
-
-	return ddrctrl_base;
+	return DDRCTRL_BASE;
 }
 
 uintptr_t stm32mp_ddrphyc_base(void)
 {
-	static uintptr_t ddrphyc_base;
-
-	if (ddrphyc_base == 0) {
-		ddrphyc_base = dt_get_ddrphyc_base();
-
-		assert(ddrphyc_base == DDRPHYC_BASE);
-	}
-
-	return ddrphyc_base;
+	return DDRPHYC_BASE;
 }
 
 uintptr_t stm32mp_pwr_base(void)
 {
-	static uintptr_t pwr_base;
-
-	if (pwr_base == 0) {
-		pwr_base = dt_get_pwr_base();
-
-		assert(pwr_base == PWR_BASE);
-	}
-
-	return pwr_base;
+	return PWR_BASE;
 }
 
 uintptr_t stm32mp_rcc_base(void)
 {
-	static uintptr_t rcc_base;
-
-	if (rcc_base == 0) {
-		rcc_base = fdt_rcc_read_addr();
-
-		assert(rcc_base == RCC_BASE);
-	}
-
-	return rcc_base;
+	return RCC_BASE;
 }
 
 bool stm32mp_lock_available(void)
diff --git a/plat/st/common/stm32mp_dt.c b/plat/st/common/stm32mp_dt.c
index 4b8b2db..391e5f0 100644
--- a/plat/st/common/stm32mp_dt.c
+++ b/plat/st/common/stm32mp_dt.c
@@ -113,26 +113,6 @@
 
 	return fdt_address_cells(fdt, parent);
 }
-
-/*******************************************************************************
- * This function returns the size cells from the node parent.
- * Returns:
- * - #size-cells value if success.
- * - invalid value if error.
- * - a default value if undefined #size-cells property as per libfdt
- *   implementation.
- ******************************************************************************/
-static int fdt_get_node_parent_size_cells(int node)
-{
-	int parent;
-
-	parent = fdt_parent_offset(fdt, node);
-	if (parent < 0) {
-		return -FDT_ERR_NOTFOUND;
-	}
-
-	return fdt_size_cells(fdt, parent);
-}
 #endif
 
 /*******************************************************************************
@@ -241,81 +221,6 @@
 }
 
 /*******************************************************************************
- * This function gets DDRCTRL base address information from the DT.
- * Returns value on success, and 0 on failure.
- ******************************************************************************/
-uintptr_t dt_get_ddrctrl_base(void)
-{
-	int node;
-	uint32_t array[4];
-
-	node = fdt_node_offset_by_compatible(fdt, -1, DT_DDR_COMPAT);
-	if (node < 0) {
-		INFO("%s: Cannot read DDR node in DT\n", __func__);
-		return 0;
-	}
-
-	assert((fdt_get_node_parent_address_cells(node) == 1) &&
-	       (fdt_get_node_parent_size_cells(node) == 1));
-
-	if (fdt_read_uint32_array(fdt, node, "reg", 4, array) < 0) {
-		return 0;
-	}
-
-	return array[0];
-}
-
-/*******************************************************************************
- * This function gets DDRPHYC base address information from the DT.
- * Returns value on success, and 0 on failure.
- ******************************************************************************/
-uintptr_t dt_get_ddrphyc_base(void)
-{
-	int node;
-	uint32_t array[4];
-
-	node = fdt_node_offset_by_compatible(fdt, -1, DT_DDR_COMPAT);
-	if (node < 0) {
-		INFO("%s: Cannot read DDR node in DT\n", __func__);
-		return 0;
-	}
-
-	assert((fdt_get_node_parent_address_cells(node) == 1) &&
-	       (fdt_get_node_parent_size_cells(node) == 1));
-
-	if (fdt_read_uint32_array(fdt, node, "reg", 4, array) < 0) {
-		return 0;
-	}
-
-	return array[2];
-}
-
-/*******************************************************************************
- * This function gets PWR base address information from the DT.
- * Returns value on success, and 0 on failure.
- ******************************************************************************/
-uintptr_t dt_get_pwr_base(void)
-{
-	int node;
-	const fdt32_t *cuint;
-
-	node = fdt_node_offset_by_compatible(fdt, -1, DT_PWR_COMPAT);
-	if (node < 0) {
-		INFO("%s: Cannot read PWR node in DT\n", __func__);
-		return 0;
-	}
-
-	assert(fdt_get_node_parent_address_cells(node) == 1);
-
-	cuint = fdt_getprop(fdt, node, "reg", NULL);
-	if (cuint == NULL) {
-		return 0;
-	}
-
-	return fdt32_to_cpu(*cuint);
-}
-
-/*******************************************************************************
  * This function gets PWR VDD regulator voltage information from the DT.
  * Returns value in microvolts on success, and 0 on failure.
  ******************************************************************************/
@@ -355,31 +260,6 @@
 }
 
 /*******************************************************************************
- * This function gets SYSCFG base address information from the DT.
- * Returns value on success, and 0 on failure.
- ******************************************************************************/
-uintptr_t dt_get_syscfg_base(void)
-{
-	int node;
-	const fdt32_t *cuint;
-
-	node = fdt_node_offset_by_compatible(fdt, -1, DT_SYSCFG_COMPAT);
-	if (node < 0) {
-		INFO("%s: Cannot read SYSCFG node in DT\n", __func__);
-		return 0;
-	}
-
-	assert(fdt_get_node_parent_address_cells(node) == 1);
-
-	cuint = fdt_getprop(fdt, node, "reg", NULL);
-	if (cuint == NULL) {
-		return 0;
-	}
-
-	return fdt32_to_cpu(*cuint);
-}
-
-/*******************************************************************************
  * This function retrieves board model from DT
  * Returns string taken from model node, NULL otherwise
  ******************************************************************************/
diff --git a/plat/st/stm32mp1/stm32mp1_def.h b/plat/st/stm32mp1/stm32mp1_def.h
index 37b9125..ee04a23 100644
--- a/plat/st/stm32mp1/stm32mp1_def.h
+++ b/plat/st/stm32mp1/stm32mp1_def.h
@@ -506,6 +506,7 @@
 /*******************************************************************************
  * Miscellaneous STM32MP1 peripherals base address
  ******************************************************************************/
+#define BSEC_BASE			U(0x5C005000)
 #define CRYP1_BASE			U(0x54001000)
 #define DBGMCU_BASE			U(0x50081000)
 #define HASH1_BASE			U(0x54002000)
@@ -514,6 +515,8 @@
 #define RNG1_BASE			U(0x54003000)
 #define RTC_BASE			U(0x5c004000)
 #define SPI6_BASE			U(0x5c001000)
+#define STGEN_BASE			U(0x5c008000)
+#define SYSCFG_BASE			U(0x50020000)
 
 /*******************************************************************************
  * Device Tree defines
@@ -522,6 +525,5 @@
 #define DT_IWDG_COMPAT			"st,stm32mp1-iwdg"
 #define DT_PWR_COMPAT			"st,stm32mp1,pwr-reg"
 #define DT_RCC_CLK_COMPAT		"st,stm32mp1-rcc"
-#define DT_SYSCFG_COMPAT		"st,stm32mp157-syscfg"
 
 #endif /* STM32MP1_DEF_H */
diff --git a/plat/st/stm32mp1/stm32mp1_syscfg.c b/plat/st/stm32mp1/stm32mp1_syscfg.c
index 2fd06f3..109725c 100644
--- a/plat/st/stm32mp1/stm32mp1_syscfg.c
+++ b/plat/st/stm32mp1/stm32mp1_syscfg.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019, STMicroelectronics - All Rights Reserved
+ * Copyright (c) 2019-2020, STMicroelectronics - All Rights Reserved
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -63,18 +63,17 @@
 	uint32_t bootr;
 	uint32_t otp = 0;
 	uint32_t vdd_voltage;
-	uintptr_t syscfg_base = dt_get_syscfg_base();
 
 	/*
 	 * Interconnect update : select master using the port 1.
 	 * LTDC = AXI_M9.
 	 */
-	mmio_write_32(syscfg_base + SYSCFG_ICNR, SYSCFG_ICNR_AXI_M9);
+	mmio_write_32(SYSCFG_BASE + SYSCFG_ICNR, SYSCFG_ICNR_AXI_M9);
 
 	/* Disable Pull-Down for boot pin connected to VDD */
-	bootr = mmio_read_32(syscfg_base + SYSCFG_BOOTR) &
+	bootr = mmio_read_32(SYSCFG_BASE + SYSCFG_BOOTR) &
 		SYSCFG_BOOTR_BOOT_MASK;
-	mmio_clrsetbits_32(syscfg_base + SYSCFG_BOOTR, SYSCFG_BOOTR_BOOTPD_MASK,
+	mmio_clrsetbits_32(SYSCFG_BASE + SYSCFG_BOOTR, SYSCFG_BOOTR_BOOTPD_MASK,
 			   bootr << SYSCFG_BOOTR_BOOTPD_SHIFT);
 
 	/*
@@ -105,7 +104,7 @@
 	if (vdd_voltage == 0U) {
 		WARN("VDD unknown");
 	} else if (vdd_voltage < 2700000U) {
-		mmio_write_32(syscfg_base + SYSCFG_IOCTRLSETR,
+		mmio_write_32(SYSCFG_BASE + SYSCFG_IOCTRLSETR,
 			      SYSCFG_IOCTRLSETR_HSLVEN_TRACE |
 			      SYSCFG_IOCTRLSETR_HSLVEN_QUADSPI |
 			      SYSCFG_IOCTRLSETR_HSLVEN_ETH |
@@ -129,8 +128,6 @@
 
 void stm32mp1_syscfg_enable_io_compensation(void)
 {
-	uintptr_t syscfg_base = dt_get_syscfg_base();
-
 	/*
 	 * Activate automatic I/O compensation.
 	 * Warning: need to ensure CSI enabled and ready in clock driver.
@@ -138,20 +135,19 @@
 	 */
 	stm32mp1_clk_enable_non_secure(SYSCFG);
 
-	mmio_setbits_32(syscfg_base + SYSCFG_CMPENSETR,
+	mmio_setbits_32(SYSCFG_BASE + SYSCFG_CMPENSETR,
 			SYSCFG_CMPENSETR_MPU_EN);
 
-	while ((mmio_read_32(syscfg_base + SYSCFG_CMPCR) &
+	while ((mmio_read_32(SYSCFG_BASE + SYSCFG_CMPCR) &
 		SYSCFG_CMPCR_READY) == 0U) {
 		;
 	}
 
-	mmio_clrbits_32(syscfg_base + SYSCFG_CMPCR, SYSCFG_CMPCR_SW_CTRL);
+	mmio_clrbits_32(SYSCFG_BASE + SYSCFG_CMPCR, SYSCFG_CMPCR_SW_CTRL);
 }
 
 void stm32mp1_syscfg_disable_io_compensation(void)
 {
-	uintptr_t syscfg_base = dt_get_syscfg_base();
 	uint32_t value;
 
 	/*
@@ -160,20 +156,18 @@
 	 * requested for other usages and always OFF in STANDBY.
 	 * Disable non-secure SYSCFG clock, we assume non-secure is suspended.
 	 */
-	value = mmio_read_32(syscfg_base + SYSCFG_CMPCR) >>
+	value = mmio_read_32(SYSCFG_BASE + SYSCFG_CMPCR) >>
 	      SYSCFG_CMPCR_ANSRC_SHIFT;
 
-	mmio_clrbits_32(syscfg_base + SYSCFG_CMPCR,
+	mmio_clrbits_32(SYSCFG_BASE + SYSCFG_CMPCR,
 			SYSCFG_CMPCR_RANSRC | SYSCFG_CMPCR_RAPSRC);
 
-	value = mmio_read_32(syscfg_base + SYSCFG_CMPCR) |
+	value = mmio_read_32(SYSCFG_BASE + SYSCFG_CMPCR) |
 		(value << SYSCFG_CMPCR_RANSRC_SHIFT);
 
-	mmio_write_32(syscfg_base + SYSCFG_CMPCR, value);
+	mmio_write_32(SYSCFG_BASE + SYSCFG_CMPCR, value | SYSCFG_CMPCR_SW_CTRL);
 
-	mmio_setbits_32(syscfg_base + SYSCFG_CMPCR, SYSCFG_CMPCR_SW_CTRL);
-
-	mmio_clrbits_32(syscfg_base + SYSCFG_CMPENSETR,
+	mmio_clrbits_32(SYSCFG_BASE + SYSCFG_CMPENSETR,
 			SYSCFG_CMPENSETR_MPU_EN);
 
 	stm32mp1_clk_disable_non_secure(SYSCFG);