[ENV][MYON2] Add overlay carrier board support

board/seco/imx8mm_myon2/env_conf.h

@@ -58,6 +58,21 @@ data_boot_dev_t filesystem_dev_imx8_list[] = {
 
 size_t filesystem_dev_imx8_size = sizeof(filesystem_dev_imx8_list) / sizeof(filesystem_dev_imx8_list[0]);
 
+#ifdef CONFIG_OF_LIBFDT_OVERLAY
+/* Carrier Boards */
+overlay_list_t overlay_carrier_list [] = {
+	{
+		.title = "Carrier Board",
+		.options = {
+			{ "not used", "" }, // default
+			{ "ConXM", "seco-imx8mm-myon2-conxm.dtbo" },
+		},
+	},
+};
+
+size_t overlay_carrier_size = sizeof( overlay_carrier_list ) / sizeof( overlay_carrier_list[0] );
+#endif
+
 video_mode_t video_mode_list_cfg [] = {
 	{
 		/* NO DISPLAY */

board/seco/imx8mm_myon2/imx8mm_myon2.c

@@ -569,6 +569,8 @@ int board_late_init(void)
 	gd->bsp_sources.filesystem_dev_list      = &filesystem_dev_imx8_list[0];
 	gd->bsp_sources.filesystem_dev_num       = filesystem_dev_imx8_size;
 #ifdef CONFIG_OF_LIBFDT_OVERLAY
+	gd->boot_setup.overlay_carrier_list      = overlay_carrier_list;
+	gd->boot_setup.overlay_carrier_num       = overlay_carrier_size;
 	gd->bsp_sources.fdt_overlay_dev_list     = fdt_overlay_dev_imx8_list;
 	gd->bsp_sources.fdt_overlay_dev_num      = fdt_overlay_dev_imx8_size;
 	gd->boot_setup.video_mode_list           = video_mode_list_cfg;