[openwrt/openwrt] ramips: add support for DLINK DWR-921-C3

[LEDE Commits]

mkresin pushed a commit to openwrt/openwrt.git, branch master:
https://git.lede-project.org/8db84cc0ee70382ea7f861691f73252cc7d3dfb3

commit 8db84cc0ee70382ea7f861691f73252cc7d3dfb3
Author: Pawel Dembicki <paweldembicki at gmail.com>
AuthorDate: Thu Mar 22 21:47:17 2018 +0100

    ramips: add support for DLINK DWR-921-C3
    
    The DWR-921-C3 Wireless Routers with LTE embedded modem is based on the
    MT7620N SoC.
    
    Specification:
    
      * MediaTek MT7620N (580 Mhz)
      * 64 MB of RAM
      * 16 MB of FLASH
      * 802.11bgn radio
      * 5x 10/100 Mbps Ethernet (1 WAN and 4 LAN)
      * 2x external, detachable (LTE) antennas
      * UART header on PCB (57600 8n1)
      * 6x LED (GPIO-controlled)
      * 1x bi-color Signal Strength LED (GPIO-controlled)
      * 2x button
      * JBOOT bootloader
    
    Installation:
    Apply factory image via d-link http web-gui.
    
    How to revert to OEM firmware:
    1.) Push the reset button and turn on the power. Wait until LED start
        blinking (~10sec.)
    2.) Upload original factory image via JBOOT http (IP: 192.168.123.254)
    3.) If http doesn't work, it can be done with curl command:
        curl -F FN=@XXXXX.bin http://192.168.123.254/upg
        where XXXXX.bin is name of firmware file.
    
    Signed-off-by: Pawel Dembicki <paweldembicki at gmail.com>
---
 target/linux/ramips/image/mt7620.mk | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/target/linux/ramips/image/mt7620.mk b/target/linux/ramips/image/mt7620.mk
index 185a081..75cd818 100644
--- a/target/linux/ramips/image/mt7620.mk
+++ b/target/linux/ramips/image/mt7620.mk
@@ -178,6 +178,14 @@ define Device/dlink_dwr-921-c1
 endef
 TARGET_DEVICES += dlink_dwr-921-c1
 
+define Device/dlink_dwr-921-c3
+  $(Device/dlink_dwr-921-c1)
+  DEVICE_TITLE := D-Link DWR-921 C3
+  DLINK_ROM_ID := DLK6E2414009
+  SUPPORTED_DEVICES := dlink,dwr-921-c1
+endef
+TARGET_DEVICES += dlink_dwr-921-c3
+
 define Device/e1700
   DTS := E1700
   IMAGES += factory.bin