add support to generate uboot environment images

create uboot environment images to populate the sdcard
images.  This allows non-default uboot environments to be
used without the need for changing / patching uboot

Initially add de0-nano-soc environment

1 files changed, 2 insertions, 1 deletions

diff --git a/classes/sdcard_image-socfpga.bbclass b/classes/sdcard_image-socfpga.bbclass
index 8ac12b1..672ea6d 100644
--- a/classes/sdcard_image-socfpga.bbclass
+++ b/classes/sdcard_image-socfpga.bbclass
@@ -26,6 +26,7 @@ FAT_SPACE ?= "102400"
 
 # uBoot ENV offset
 SDIMG_UBOOT_ENV_OFFSET ?= "512"
+ENV_BASE_NAME ??= "${UBOOT_CONFIG}" 
 
 # Boot partition begin at sector 1024
 # This is required as for c5/a5 mainline uboot hard codes the location
@@ -173,7 +174,7 @@ IMAGE_CMD_socfpga-sdimg () {
         fi
         
         if [ -e "${DEPLOY_DIR_IMAGE}/u-boot-env-${ENV_BASE_NAME}.bin" ]; then 
-                dd if=${DEPLOY_DIR_IMAGE}/u-boot-env-${ENV_BASE_NAME}.bin of=${SDIMG} bs=1 seek=${SDIMG_UBOOT_ENV_OFFSET}
+                dd if=${DEPLOY_DIR_IMAGE}/u-boot-env-${ENV_BASE_NAME}.bin of=${SDIMG} conv=notrunc bs=1 seek=${SDIMG_UBOOT_ENV_OFFSET} && sync && sync
         fi
         
 }