The DIR-685 has the MAC addresses in the RedBoot code just like
DNS-313. Check some magic numbers to determine that the MAC
address is where we want it and extract it from RedBoot.

Signed-off-by: Linus Walleij <linus.wall...@linaro.org>
---
 .../lib/preinit/05_set_ether_mac_gemini           | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/target/linux/gemini/base-files/lib/preinit/05_set_ether_mac_gemini 
b/target/linux/gemini/base-files/lib/preinit/05_set_ether_mac_gemini
index 6072e828c678..ecf4a8238143 100644
--- a/target/linux/gemini/base-files/lib/preinit/05_set_ether_mac_gemini
+++ b/target/linux/gemini/base-files/lib/preinit/05_set_ether_mac_gemini
@@ -18,6 +18,21 @@ set_ether_mac() {
                        fi
                fi
                ;;
+       dlink,dir-685)
+               # The DIR-685 has a special field in its RedBoot
+               # binary that we need to check
+               CONFIG_PARTITION="$(grep "RedBoot" /proc/mtd | cut -d: -f1)"
+               if [ ! -z $CONFIG_PARTITION ] ; then
+                       DEVID="$(dd if=/dev/mtdblock0 bs=1 skip=81516 count=7 
2>/dev/null)"
+                       if [ "x$DEVID" = "xILI9322" ] ; then
+                               MAC1="$(dd if=/dev/mtdblock0 bs=1 skip=95040 
count=6 2>/dev/null | hexdump -n6 -v -e '/1 ":%02X"' | sed s/^://g)"
+                               MAC2="$(dd if=/dev/mtdblock0 bs=1 skip=95046 
count=6 2>/dev/null | hexdump -n6 -v -e '/1 ":%02X"' | sed s/^://g)"
+                               ifconfig eth0 hw ether $MAC1 2>/dev/null
+                               ifconfig eth1 hw ether $MAC2 2>/dev/null
+                               return 0
+                       fi
+               fi
+               ;;
        esac
 
        # Most devices have a standard "VCTL" partition
-- 
2.20.1


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