diff --git a/drivers/arm/ethosn/ethosn_big_fw.c b/drivers/arm/ethosn/ethosn_big_fw.c
index ea48a24..2aad5da 100644
--- a/drivers/arm/ethosn/ethosn_big_fw.c
+++ b/drivers/arm/ethosn/ethosn_big_fw.c
@@ -12,7 +12,7 @@
 #define ETHOSN_BIG_FW_MAGIC	('E' | ('N' << 8) | ('F' << 16) | ('W' << 24))
 
 /* Supported big firmware version */
-#define ETHOSN_BIG_FW_VERSION_MAJOR	12
+#define ETHOSN_BIG_FW_VERSION_MAJOR	15
 
 #define ETHOSN_ARCH_VER_MAJOR_MASK	U(0xF000)
 #define ETHOSN_ARCH_VER_MAJOR_SHIFT	U(0xC)
diff --git a/drivers/arm/ethosn/ethosn_smc.c b/drivers/arm/ethosn/ethosn_smc.c
index 42158e4..9aa7e23 100644
--- a/drivers/arm/ethosn/ethosn_smc.c
+++ b/drivers/arm/ethosn/ethosn_smc.c
@@ -46,7 +46,7 @@
 #define ETHOSN_AUX_FEAT_STASHING	U(0x2)
 
 #define SEC_AUXCTLR_REG			U(0x0024)
-#define SEC_AUXCTLR_VAL			U(0x80)
+#define SEC_AUXCTLR_VAL			U(0x000ce080)
 #define SEC_AUXCTLR_LEVEL_IRQ_VAL	U(0x04)
 #define SEC_AUXCTLR_STASHING_VAL	U(0xA5000000)
 
@@ -73,7 +73,7 @@
 #define SEC_SYSCTRL0_HARD_RESET		U(1U << 31)
 
 #define SEC_SYSCTRL1_REG		U(0x001C)
-#define SEC_SYSCTRL1_VAL		U(0x180110)
+#define SEC_SYSCTRL1_VAL		U(0xe0180110)
 
 #define SEC_NSAID_REG_BASE		U(0x3004)
 #define SEC_NSAID_OFFSET		U(0x1000)
diff --git a/include/drivers/arm/ethosn.h b/include/drivers/arm/ethosn.h
index 993dd12..51ce65d 100644
--- a/include/drivers/arm/ethosn.h
+++ b/include/drivers/arm/ethosn.h
@@ -47,7 +47,7 @@
 #define is_ethosn_fid(_fid) (((_fid) & ETHOSN_FID_MASK) == ETHOSN_FID_VALUE)
 
 /* Service version  */
-#define ETHOSN_VERSION_MAJOR U(3)
+#define ETHOSN_VERSION_MAJOR U(4)
 #define ETHOSN_VERSION_MINOR U(0)
 
 /* Return codes for function calls */