imx8m_som/spl.c : add code to initailize the MMC when we boot from SDP

board/emcraft/imx8m_som/spl.c

@@ -371,10 +371,27 @@ static int setup_typec(void)
 }
 #endif
 
+static int sdp_mmc_init(void)
+{
+	struct mmc *mmc = NULL;
+	int err = 0;
+
+	err = spl_mmc_find_device(&mmc, BOOT_DEVICE_MMC1);
+	if (err)
+		return err;
+
+	err = mmc_init(mmc);
+	if (err) {
+		printf("spl: mmc_init failed: %d\n", err);
+	}
+
+	return 0;
+}
 
 void board_init_f(ulong dummy)
 {
-	int ret;
+	int ret, err;
+	struct mmc *mmc;
 
 	/* Clear global data */
 	memset((void *)gd, 0, sizeof(gd_t));
@@ -412,8 +429,12 @@ void board_init_f(ulong dummy)
 	/* DDR initialization */
 	spl_dram_init();
 
-	printf( "Board init\n" );
+	if( is_usb_boot() ) {
+		printf( "MMC init\n" );
+		sdp_mmc_init();
+	}
 
+	printf( "Board init\n" );
 	board_init_r(NULL, 0);
 
 }

common/spl/spl_mmc.c

@@ -124,7 +124,7 @@ int spl_mmc_get_device_index(u32 boot_device)
 	return -ENODEV;
 }
 
-static int spl_mmc_find_device(struct mmc **mmcp, u32 boot_device)
+int spl_mmc_find_device(struct mmc **mmcp, u32 boot_device)
 {
 #ifdef CONFIG_DM_MMC
 	struct udevice *dev;