diff --git a/arch/arm/mach-imx/spl.c b/arch/arm/mach-imx/spl.c
index b06d2e2..6d91113 100644
--- a/arch/arm/mach-imx/spl.c
+++ b/arch/arm/mach-imx/spl.c
@@ -116,10 +116,19 @@ u32 spl_boot_device(void)
 	case SD1_BOOT:
 	case MMC1_BOOT:
 		return BOOT_DEVICE_MMC1;
+#if defined(CONFIG_IMX8MM)
+	case SD2_BOOT:
+	case MMC2_BOOT:
+		return BOOT_DEVICE_MMC1;
+	case SD3_BOOT:
+	case MMC3_BOOT:
+		return BOOT_DEVICE_MMC2;
+#else
 	case SD2_BOOT:
 	case MMC2_BOOT:
 		return BOOT_DEVICE_MMC2;
 #endif
+#endif
 	case NAND_BOOT:
 		return BOOT_DEVICE_NAND;
 	case SPI_NOR_BOOT:
@@ -150,6 +159,7 @@ u32 spl_boot_mode(const u32 boot_device)
 	/* for MMC return either RAW or FAT mode */
 	case SD1_BOOT:
 	case SD2_BOOT:
+	case SD3_BOOT:
 #if defined(CONFIG_SPL_FAT_SUPPORT)
 		return MMCSD_MODE_FS;
 #else
@@ -158,6 +168,7 @@ u32 spl_boot_mode(const u32 boot_device)
 		break;
 	case MMC1_BOOT:
 	case MMC2_BOOT:
+	case MMC3_BOOT:
 #if defined(CONFIG_SPL_FAT_SUPPORT)
 		return MMCSD_MODE_FS;
 #elif defined(CONFIG_SUPPORT_EMMC_BOOT)