diff --git a/drivers/renesas/rcar/cpld/ulcb_cpld.c b/drivers/renesas/rcar/cpld/ulcb_cpld.c
index 4830853739bffc234deb20d441d886a5d38bb907..5ffb2e1971cf8f801d5bbe1cb6be4df9a3260173 100644
--- a/drivers/renesas/rcar/cpld/ulcb_cpld.c
+++ b/drivers/renesas/rcar/cpld/ulcb_cpld.c
@@ -68,7 +68,7 @@ static void cpld_write(uint8_t addr, uint32_t data)
 
 	for (i = 0; i < 32; i++) {
 		/* MSB first */
-		gpio_set_value(GPIO_OUTDT6, MOSI, data & (1 << 31));
+		gpio_set_value(GPIO_OUTDT6, MOSI, data & (1U << 31));
 		gpio_set_value(GPIO_OUTDT6, SCLK, 1);
 		data <<= 1;
 		gpio_set_value(GPIO_OUTDT6, SCLK, 0);
diff --git a/drivers/renesas/rcar/pwrc/pwrc.c b/drivers/renesas/rcar/pwrc/pwrc.c
index d97e593bbdb82056ca5183b2424c534668b2bc2a..f4c9d3abcb70132d15814a5864101c8f9d39c4b6 100644
--- a/drivers/renesas/rcar/pwrc/pwrc.c
+++ b/drivers/renesas/rcar/pwrc/pwrc.c
@@ -763,10 +763,10 @@ uint32_t rcar_pwrc_get_cluster(void)
 
 	reg = mmio_read_32(RCAR_PRR);
 
-	if (reg & (1 << (STATE_CA53_CPU + RCAR_CA53CPU_NUM_MAX)))
+	if (reg & (1U << (STATE_CA53_CPU + RCAR_CA53CPU_NUM_MAX)))
 		return RCAR_CLUSTER_CA57;
 
-	if (reg & (1 << (STATE_CA57_CPU + RCAR_CA57CPU_NUM_MAX)))
+	if (reg & (1U << (STATE_CA57_CPU + RCAR_CA57CPU_NUM_MAX)))
 		return RCAR_CLUSTER_CA53;
 
 	return RCAR_CLUSTER_A53A57;
@@ -810,7 +810,7 @@ uint32_t rcar_pwrc_get_cpu_num(uint32_t c)
 
 count_ca57:
 	if (IS_A53A57(c) || IS_CA57(c)) {
-		if (reg & (1 << (STATE_CA57_CPU + RCAR_CA57CPU_NUM_MAX)))
+		if (reg & (1U << (STATE_CA57_CPU + RCAR_CA57CPU_NUM_MAX)))
 			goto done;
 
 		for (i = 0; i < RCAR_CA57CPU_NUM_MAX; i++) {
diff --git a/drivers/renesas/rcar/pwrc/pwrc.h b/drivers/renesas/rcar/pwrc/pwrc.h
index cfb35ff92350ceeb99a195b5ca1a3182fc0aba8c..e67c6ef2d60c97f1208d561906011b641380ce40 100644
--- a/drivers/renesas/rcar/pwrc/pwrc.h
+++ b/drivers/renesas/rcar/pwrc/pwrc.h
@@ -15,7 +15,7 @@
 
 #define PWKUPR_WEN		(1ull << 31)
 
-#define PSYSR_AFF_L2		(1 << 31)
+#define PSYSR_AFF_L2		(1U << 31)
 #define PSYSR_AFF_L1		(1 << 30)
 #define PSYSR_AFF_L0		(1 << 29)
 #define PSYSR_WEN		(1 << 28)
diff --git a/plat/renesas/rcar/rcar_common.c b/plat/renesas/rcar/rcar_common.c
index d24d71af3b4d455127c5fd229c7f03faf5a7b524..4ea753f2db8c1eeb70e224b5c31299ba1970e9e7 100644
--- a/plat/renesas/rcar/rcar_common.c
+++ b/plat/renesas/rcar/rcar_common.c
@@ -18,10 +18,10 @@
 #define MSTP318			(1 << 18)
 #define MSTP319			(1 << 19)
 #define PMSR			0x5c
-#define PMSR_L1FAEG		(1 << 31)
+#define PMSR_L1FAEG		(1U << 31)
 #define PMSR_PMEL1RX		(1 << 23)
 #define PMCTLR			0x60
-#define PMSR_L1IATN		(1 << 31)
+#define PMSR_L1IATN		(1U << 31)
 
 static int rcar_pcie_fixup(unsigned int controller)
 {