board/boundarydevices: remove u-boot from genimage.cfg

Adding a comment to explain how to update the bootloader since it is
located in NOR flash memory.

Signed-off-by: Gary Bisson <gary.bisson@boundarydevices.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

diff --git a/board/boundarydevices/common/genimage.cfg b/board/boundarydevices/common/genimage.cfg
index 7a5e71e58a905b21ba00a4fb629e08d05f7e6146..a383fb750c3b7ce745bf93a05d4659588ae83225 100644 (file)
--- a/board/boundarydevices/common/genimage.cfg
+++ b/board/boundarydevices/common/genimage.cfg
@@ -1,13 +1,15 @@
+# Minimal SD card image for Boundary Devices platforms
+#
+# It does not need a boot section for a bootloader since it is booted
+# from its NOR flash memory.
+#
+# To update the bootloader, execute the following from U-Boot prompt:
+# => run upgradeu
+
 image sdcard.img {
        hdimage {
        }
 
-       partition u-boot {
-               in-partition-table = "no"
-               image = "u-boot.imx"
-               offset = 1024
-       }
-
        partition rootfs {
                partition-type = 0x83
                image = "rootfs.ext4"