[PATCH v2 5/5] ds414: Add sample u-boot update command

[Phil Sutter]

Call 'run update_uboot' to fetch u-boot-spl.kwb via TFTP and write it
into the correct SPI flash location. The latter's size is defined in
DS414's DTB file, so hard-coding it should be acceptable here.

Take care to not append garbage from RAM to the written image and to
stay within assigned flash boundaries even if an oversized image was
fetched.

Signed-off-by: Phil Sutter <phil at nwl.cc>
---
Changes since v1:
- Add a proper commit message.
---
 include/configs/ds414.h | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/include/configs/ds414.h b/include/configs/ds414.h
index a2248cf75ad72..c8b45066cc75a 100644
--- a/include/configs/ds414.h
+++ b/include/configs/ds414.h
@@ -88,7 +88,12 @@
 	"initrd_high=0xffffffff\0"				\
 	"ramdisk_addr_r=0x8000000\0"				\
 	"usb0Mode=host\0usb1Mode=host\0usb2Mode=device\0"	\
-	"ethmtu=1500\0eth1mtu=1500\0"
+	"ethmtu=1500\0eth1mtu=1500\0"				\
+	"update_uboot=sf probe; dhcp; "				\
+		"mw.b ${loadaddr} 0x0 0xd0000; "		\
+		"tftpboot ${loadaddr} u-boot-spl.kwb; "		\
+		"sf update ${loadaddr} 0x0 0xd0000\0"
+
 
 /* increase autoneg timeout, my NIC sucks */
 #define PHY_ANEG_TIMEOUT	16000
-- 
2.30.1