diff --git a/drivers/partition/gpt.c b/drivers/partition/gpt.c
index 9cc917d33..0c51e62a8 100644
--- a/drivers/partition/gpt.c
+++ b/drivers/partition/gpt.c
@@ -13,10 +13,14 @@
 
 static int unicode_to_ascii(unsigned short *str_in, unsigned char *str_out)
 {
-	uint8_t *name = (uint8_t *)str_in;
+	uint8_t *name;
 	int i;
 
-	assert((str_in != NULL) && (str_out != NULL) && (name[0] != '\0'));
+	assert((str_in != NULL) && (str_out != NULL));
+
+	name = (uint8_t *)str_in;
+
+	assert(name[0] != '\0');
 
 	/* check whether the unicode string is valid */
 	for (i = 1; i < (EFI_NAMELEN << 1); i += 2) {
@@ -36,7 +40,7 @@ int parse_gpt_entry(gpt_entry_t *gpt_entry, partition_entry_t *entry)
 {
 	int result;
 
-	assert((gpt_entry != 0) && (entry != 0));
+	assert((gpt_entry != NULL) && (entry != NULL));
 
 	if ((gpt_entry->first_lba == 0) && (gpt_entry->last_lba == 0)) {
 		return -EINVAL;
diff --git a/drivers/st/clk/stm32mp1_clk.c b/drivers/st/clk/stm32mp1_clk.c
index f0bf363e2..b8457cb37 100644
--- a/drivers/st/clk/stm32mp1_clk.c
+++ b/drivers/st/clk/stm32mp1_clk.c
@@ -1323,7 +1323,7 @@ int stm32mp1_clk_init(void)
 	int ret, len;
 	enum stm32mp1_pll_id i;
 	bool lse_css = false;
-	const uint32_t *pkcs_cell;
+	const fdt32_t *pkcs_cell;
 
 	/* Check status field to disable security */
 	if (!fdt_get_rcc_secure_status()) {
@@ -1529,7 +1529,7 @@ int stm32mp1_clk_init(void)
 		priv->pkcs_usb_value = 0;
 
 		for (j = 0; j < ((uint32_t)len / sizeof(uint32_t)); j++) {
-			uint32_t pkcs = (uint32_t)fdt32_to_cpu(pkcs_cell[j]);
+			uint32_t pkcs = fdt32_to_cpu(pkcs_cell[j]);
 
 			if (pkcs == (uint32_t)CLK_CKPER_DISABLED) {
 				ckper_disabled = true;
diff --git a/drivers/st/clk/stm32mp1_clkfunc.c b/drivers/st/clk/stm32mp1_clkfunc.c
index d4c69cb4e..078d803e7 100644
--- a/drivers/st/clk/stm32mp1_clkfunc.c
+++ b/drivers/st/clk/stm32mp1_clkfunc.c
@@ -265,11 +265,11 @@ int fdt_rcc_subnode_offset(const char *name)
  * This function gets the pointer to a rcc-clk property from its name.
  * It reads the values indicated inside the device tree.
  * Length of the property is stored in the second parameter.
- * Returns pointer if success, and NULL value else.
+ * Returns pointer on success, and NULL value on failure.
  ******************************************************************************/
-const uint32_t *fdt_rcc_read_prop(const char *prop_name, int *lenp)
+const fdt32_t *fdt_rcc_read_prop(const char *prop_name, int *lenp)
 {
-	const uint32_t *cuint;
+	const fdt32_t *cuint;
 	int node, len;
 	void *fdt;
 
diff --git a/include/drivers/st/stm32mp1_clkfunc.h b/include/drivers/st/stm32mp1_clkfunc.h
index b11ccf860..2467af9bb 100644
--- a/include/drivers/st/stm32mp1_clkfunc.h
+++ b/include/drivers/st/stm32mp1_clkfunc.h
@@ -7,6 +7,7 @@
 #ifndef STM32MP1_CLKFUNC_H
 #define STM32MP1_CLKFUNC_H
 
+#include <libfdt.h>
 #include <stdbool.h>
 
 enum stm32mp_osc_id {
@@ -33,7 +34,7 @@ uint32_t fdt_rcc_read_addr(void);
 int fdt_rcc_read_uint32_array(const char *prop_name,
 			      uint32_t *array, uint32_t count);
 int fdt_rcc_subnode_offset(const char *name);
-const uint32_t *fdt_rcc_read_prop(const char *prop_name, int *lenp);
+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);
diff --git a/include/drivers/st/stm32mp1_ddr_regs.h b/include/drivers/st/stm32mp1_ddr_regs.h
index 9598d9ba5..288e072d2 100644
--- a/include/drivers/st/stm32mp1_ddr_regs.h
+++ b/include/drivers/st/stm32mp1_ddr_regs.h
@@ -408,6 +408,4 @@ struct stm32mp1_ddrphy {
 #define DDRPHYC_DXNDLLCR_SDPHASE_MASK		GENMASK(17, 14)
 #define DDRPHYC_DXNDLLCR_SDPHASE_SHIFT		14
 
-void ddr_enable_clock(void);
-
 #endif /* STM32MP1_DDR_REGS_H */
diff --git a/include/lib/psci/psci.h b/include/lib/psci/psci.h
index b27e48153..b7febc38f 100644
--- a/include/lib/psci/psci.h
+++ b/include/lib/psci/psci.h
@@ -302,10 +302,10 @@ typedef struct plat_psci_ops {
 	void (*pwr_domain_on_finish)(const psci_power_state_t *target_state);
 	void (*pwr_domain_suspend_finish)(
 				const psci_power_state_t *target_state);
-	void (*pwr_domain_pwr_down_wfi)(
-				const psci_power_state_t *target_state) __dead2;
-	void (*system_off)(void) __dead2;
-	void (*system_reset)(void) __dead2;
+	void __dead2 (*pwr_domain_pwr_down_wfi)(
+				const psci_power_state_t *target_state);
+	void __dead2 (*system_off)(void);
+	void __dead2 (*system_reset)(void);
 	int (*validate_power_state)(unsigned int power_state,
 				    psci_power_state_t *req_state);
 	int (*validate_ns_entrypoint)(uintptr_t ns_entrypoint);
diff --git a/plat/st/stm32mp1/bl2_io_storage.c b/plat/st/stm32mp1/bl2_io_storage.c
index 9a023124c..fdbd4bfd0 100644
--- a/plat/st/stm32mp1/bl2_io_storage.c
+++ b/plat/st/stm32mp1/bl2_io_storage.c
@@ -37,7 +37,7 @@ static io_block_spec_t gpt_block_spec = {
 	.length = 34 * MMC_BLOCK_SIZE, /* Size of GPT table */
 };
 
-uint32_t block_buffer[MMC_BLOCK_SIZE] __aligned(MMC_BLOCK_SIZE);
+static uint32_t block_buffer[MMC_BLOCK_SIZE] __aligned(MMC_BLOCK_SIZE);
 
 static const io_block_dev_spec_t mmc_block_dev_spec = {
 	/* It's used as temp buffer in block driver */
diff --git a/plat/st/stm32mp1/plat_image_load.c b/plat/st/stm32mp1/plat_image_load.c
index 3c6d677a0..d5b328e3c 100644
--- a/plat/st/stm32mp1/plat_image_load.c
+++ b/plat/st/stm32mp1/plat_image_load.c
@@ -5,6 +5,7 @@
  */
 
 #include <desc_image_load.h>
+#include <platform.h>
 
 /*******************************************************************************
  * This function flushes the data structures so that they are visible