diff --git a/arch/arm/mach-k3/include/mach/j721e_hardware.h b/arch/arm/mach-k3/include/mach/j721e_hardware.h
index ead136e..2efa911 100644
--- a/arch/arm/mach-k3/include/mach/j721e_hardware.h
+++ b/arch/arm/mach-k3/include/mach/j721e_hardware.h
@@ -18,6 +18,8 @@
 #define MAIN_DEVSTAT_BKUP_BOOTMODE_SHIFT	1
 #define MAIN_DEVSTAT_PRIM_BOOTMODE_MMC_PORT_MASK	BIT(6)
 #define MAIN_DEVSTAT_PRIM_BOOTMODE_PORT_SHIFT		6
+#define MAIN_DEVSTAT_BKUP_MMC_PORT_MASK			BIT(7)
+#define MAIN_DEVSTAT_BKUP_MMC_PORT_SHIFT		7
 
 #define WKUP_CTRL_MMR0_BASE				0x43000000
 #define MCU_CTRL_MMR0_BASE				0x40f00000
diff --git a/arch/arm/mach-k3/include/mach/j721e_spl.h b/arch/arm/mach-k3/include/mach/j721e_spl.h
index 475278b..1cabc01 100644
--- a/arch/arm/mach-k3/include/mach/j721e_spl.h
+++ b/arch/arm/mach-k3/include/mach/j721e_spl.h
@@ -25,7 +25,19 @@
 #define BOOT_DEVICE_MMC2_2		0x16
 #define BOOT_DEVICE_RAM			0x17
 
+/* Backup boot modes with MCU Only = 0 */
+#define BACKUP_BOOT_DEVICE_RAM		0x0
+#define BACKUP_BOOT_DEVICE_USB		0x1
+#define BACKUP_BOOT_DEVICE_UART		0x3
+#define BACKUP_BOOT_DEVICE_ETHERNET	0x4
+#define BACKUP_BOOT_DEVICE_MMC2		0x5
+#define BACKUP_BOOT_DEVICE_SPI		0x6
+#define BACKUP_BOOT_DEVICE_I2C		0x7
+
 #define BOOT_MODE_B_SHIFT		4
 #define BOOT_MODE_B_MASK		BIT(4)
 
+#define K3_PRIMARY_BOOTMODE		0x0
+#define K3_BACKUP_BOOTMODE		0x1
+
 #endif