Pobieranie źródeł: 
  
  $ cd ~
  $ git clone [url]https://github.com/openwrt/openwrt.git[/url]
  $ cd openwrt
  $ git fetch --tags
  $ git checkout v18.06.2
  $ make package/symlinks



Konfiguracja:
  
  # make menuconfig
    
    Target System --->
      (X) MediaTek Ralink MIPS
    
    Subtarget ---> 
      (X) MT76x8 based boards
    
    Target Profile --->
      (X) UniElec U7628-01 (128M RAM/16M flash)
      
    
  ...i zapisać jako ".config"
  # nano .config



LEDy i GPIO
  
  # cp target/linux/ramips/dts/U7628-01.dtsi target/linux/ramips/dts/U7628-01.dtsi.bak
  # nano target/linux/ramips/dts/U7628-01.dtsi



Jako root
  
  # export FORCE_UNSAFE_CONFIGURE=1



Kompilacja
  
  # make V=s -j1

Number of fragments 15
Number of symbolic links  184
Number of device nodes 1
Number of fifo nodes 0
Number of socket nodes 0
Number of directories 71
Number of ids (unique uids + gids) 1
Number of uids 1
        root (0)
Number of gids 1
        root (0)
rm -f /home/root/openwrt/sdk/openwrt/build_dir/target-mipsel_24kc_musl/linux-ramips_mt76x8/u7628-01-128M-16M-kernel.bin
cp /home/root/openwrt/sdk/openwrt/build_dir/target-mipsel_24kc_musl/linux-ramips_mt76x8/vmlinux /home/root/openwrt/sdk/openwrt/build_dir/target-mipsel_24kc_musl/linux-ramips_mt76x8/u7628-01-128M-16M-kernel.bin
mipsel-openwrt-linux-musl-cpp -nostdinc -x assembler-with-cpp -I/home/root/openwrt/sdk/openwrt/build_dir/target-mipsel_24kc_musl/linux-ramips_mt76x8/linux-4.14.95/arch/mips/boot/dts -I/home/root/openwrt/sdk/openwrt/build_dir/target-mipsel_24kc_musl/linux-ramips_mt76x8/linux-4.14.95/arch/mips/boot/dts/include -I/home/root/openwrt/sdk/openwrt/build_dir/target-mipsel_24kc_musl/linux-ramips_mt76x8/linux-4.14.95/include/ -undef -D__DTS__  -o /home/root/openwrt/sdk/openwrt/build_dir/target-mipsel_24kc_musl/linux-ramips_mt76x8/u7628-01-128M-16M-kernel.bin.dtb.tmp ../dts/U7628-01-128M-16M.dts
/home/root/openwrt/sdk/openwrt/build_dir/target-mipsel_24kc_musl/linux-ramips_mt76x8/linux-4.14.95/scripts/dtc/dtc -O dtb -i../dts/  -o /home/root/openwrt/sdk/openwrt/build_dir/target-mipsel_24kc_musl/linux-ramips_mt76x8/u7628-01-128M-16M-kernel.bin.dtb /home/root/openwrt/sdk/openwrt/build_dir/target-mipsel_24kc_musl/linux-ramips_mt76x8/u7628-01-128M-16M-kernel.bin.dtb.tmp
Error: ../dts/U7628-01.dtsi:68.5-6 syntax error
FATAL ERROR: Unable to parse input tree
Makefile:288: recipe for target '/home/root/openwrt/sdk/openwrt/build_dir/target-mipsel_24kc_musl/linux-ramips_mt76x8/u7628-01-128M-16M-kernel.bin' failed
make[5]: *** [/home/root/openwrt/sdk/openwrt/build_dir/target-mipsel_24kc_musl/linux-ramips_mt76x8/u7628-01-128M-16M-kernel.bin] Error 1
make[5]: Leaving directory '/home/root/openwrt/sdk/openwrt/target/linux/ramips/image'
Makefile:26: recipe for target 'install' failed
make[4]: *** [install] Error 2
make[4]: Leaving directory '/home/root/openwrt/sdk/openwrt/target/linux/ramips'
Makefile:13: recipe for target 'install' failed
make[3]: *** [install] Error 2
make[3]: Leaving directory '/home/root/openwrt/sdk/openwrt/target/linux'
time: target/linux/install#730.49#168.43#882.62
target/Makefile:23: recipe for target 'target/linux/install' failed
make[2]: *** [target/linux/install] Error 2
make[2]: Leaving directory '/home/root/openwrt/sdk/openwrt'
target/Makefile:19: recipe for target '/home/root/openwrt/sdk/openwrt/staging_dir/target-mipsel_24kc_musl/stamp/.target_install' failed
make[1]: *** [/home/root/openwrt/sdk/openwrt/staging_dir/target-mipsel_24kc_musl/stamp/.target_install] Error 2
make[1]: Leaving directory '/home/root/openwrt/sdk/openwrt'
/home/root/openwrt/sdk/openwrt/include/toplevel.mk:216: polecenia dla obiektu 'world' nie powiodły się
make: *** [world] Błąd 2

# nano target/linux/ramips/dts/U7628-01.dtsi

/*
 *  BSD LICENSE
 *
 *  Copyright(c) 2017 Kristian Evensen <kristian.evensen@gmail.com>.
 *  Copyright(c) 2017 Piotr Dymacz <pepe2k@gmail.com>.
 *  All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions
 *  are met:
 *
 *    * Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *    * Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in
 *      the documentation and/or other materials provided with the
 *      distribution.
 *    * Neither the name of Broadcom Corporation nor the names of its
 *      contributors may be used to endorse or promote products derived
 *      from this software without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 *  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 *  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 *  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 *  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 *  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "mt7628an.dtsi"

#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/input/input.h>

/ {
    compatible = "unielec,u7628-01", "mediatek,mt7628an-soc";

    chosen {
        bootargs = "console=ttyS0,115200";
    };

    gpio-keys-polled {
        compatible = "gpio-keys-polled";
        #address-cells = <1>;
        #size-cells = <0>;
        poll-interval = <20>;
        reset {
            label = "reset";
            gpios = <&gpio1 6 GPIO_ACTIVE_LOW>;
            linux,code = <KEY_RESTART>;
        };
    };

    gpio-leds {
        compatible = "gpio-leds";

        wlan {
            label = "u7628-01:green:wlan";
            gpios = <&gpio1 12 GPIO_ACTIVE_LOW>;
        };

        wan {
            label = "u7628-01:green:wan";
            gpios = <&gpio1 11 GPIO_ACTIVE_LOW>;
        };

        lan1 {
            label = "u7628-01:green:lan1";
            gpios = <&gpio1 10 GPIO_ACTIVE_LOW>;
        };

        lan2 {
            label = "u7628-01:green:lan2";
            gpios = <&gpio1 9 GPIO_ACTIVE_LOW>;
        };

        lan3 {
            label = "u7628-01:green:lan3";
            gpios = <&gpio1 8 GPIO_ACTIVE_LOW>;
        };

        lan4 {
            label = "u7628-01:green:lan4";
            gpios = <&gpio1 7 GPIO_ACTIVE_LOW>;
        };

    };
};

&gpio0 {
    status = "okay";
};

&gpio1 {
    status = "okay";
};

&pcie {
    status = "okay";
};

&ethernet {
    mtd-mac-address = <&factory 0x28>;
};

&wmac {
    status = "okay";
    ralink,mtd-eeprom = <&factory 0x0>;
};

&pinctrl {
    state_default: pinctrl0 {
        gpio {
            ralink,group = "gpio", "p0led_an", "p1led_an", "p2led_an", "p3led_an", "p4led_an", "refclk", "wdt", "wled_an";
            ralink,function = "gpio";
        };
    };
};

# ls /sys/class/leds

mt76-phy0
u7628-01:green:lan1    
u7628-01:green:lan2
u7628-01:green:lan3
u7628-01:green:lan4
u7628-01:green:wan
u7628-01:green:wlan

# ls /sys/class/gpio

export
gpio11
gpiochip0
gpiochip32
gpiochip64
unexport

# nano /etc/config/system

config system
    option hostname 'OpenWrt'
    option timezone 'UTC'
    option ttylogin '0'
    option log_size '64'
    option urandom_seed '0'

config timeserver 'ntp'
    option enabled '1'
    option enable_server '0'
    list server '0.openwrt.pool.ntp.org'
    list server '1.openwrt.pool.ntp.org'
    list server '2.openwrt.pool.ntp.org'
    list server '3.openwrt.pool.ntp.org'

config led 'led_lan1'
    option name 'lan1'
    option sysfs 'u7628-01:green:lan1'
    option trigger 'switch0'
    option port_mask '0x2'
    option default '0'

config led 'led_lan2'
    option name 'lan2'
    option sysfs 'u7628-01:green:lan2'
    option trigger 'switch0'
    option port_mask '0x4'
    option default '0'

config led 'led_lan3'
    option name 'lan3'
    option sysfs 'u7628-01:green:lan3'
    option trigger 'switch0'
    option port_mask '0x8'
    option default '0'

config led 'led_lan4'
    option name 'lan4'
    option sysfs 'u7628-01:green:lan4'
    option trigger 'switch0'
    option port_mask '0x10'
    option default '0'

config led 'led_wan'
    option name 'wan'
    option sysfs 'u7628-01:green:wan'
    option trigger 'switch0'
    option port_mask '0x01'
    option default '0'

config led 'led_wifi_led'
    option name 'wlan'
    option sysfs 'u7628-01:green:wlan'
    option trigger 'netdev'
    option dev 'wlan0'
    option default '0'
    option mode 'link'

# find . -name "system"

./build_dir/toolchain-mipsel_24kc_gcc-7.3.0_musl/gcc-7.3.0/libsanitizer/include/system
./build_dir/target-mipsel_24kc_musl/busybox-1.28.4/include/config/last/system
./build_dir/target-mipsel_24kc_musl/busybox-1.28.4/include/config/first/system
./build_dir/target-mipsel_24kc_musl/root.orig-ramips/etc/init.d/system
./build_dir/target-mipsel_24kc_musl/linux-ramips_mt76x8/base-files/.pkgdir/base-files/etc/init.d/system
./build_dir/target-mipsel_24kc_musl/linux-ramips_mt76x8/base-files/ipkg-mipsel_24kc/base-files/etc/init.d/system
./build_dir/target-mipsel_24kc_musl/root-ramips/etc/init.d/system
./staging_dir/target-mipsel_24kc_musl/root-ramips/etc/init.d/system
./package/base-files/files/etc/init.d/system
./package/system

# CONFIG_PACKAGE_xxxxxxxx is not set

CONFIG_PACKAGE_xxxxxxxx=y

u7628-01-128M-16M)
    ucidef_set_led_switch "lan1" "lan1" "u7628-01:green:lan1" "switch0" "0x2"
    ucidef_set_led_switch "lan2" "lan2" "u7628-01:green:lan2" "switch0" "0x4"
    ucidef_set_led_switch "lan3" "lan3" "u7628-01:green:lan3" "switch0" "0x8"
    ucidef_set_led_switch "lan4" "lan4" "u7628-01:green:lan4" "switch0" "0x10"
    ucidef_set_led_switch "wan" "wan" "u7628-01:green:wan" "switch0" "0x01"
    set_wifi_led "u7628-01:green:wlan"
;;

# nano target/linux/ramips/base-files/etc/board.d/01_leds

(...)
u7628-01-128M-16M)
        ucidef_set_led_switch "lan1" "lan1" "u7628-01:green:lan1" "switch0" "0x2"
        ucidef_set_led_switch "lan2" "lan2" "u7628-01:green:lan2" "switch0" "0x4"
        ucidef_set_led_switch "lan3" "lan3" "u7628-01:green:lan3" "switch0" "0x8"
        ucidef_set_led_switch "lan4" "lan4" "u7628-01:green:lan4" "switch0" "0x10"
        ucidef_set_led_switch "wan" "wan" "u7628-01:green:wan" "switch0" "0x01"
        ucidef_set_led_netdev "wlan" "wlan" "u7628-01:green:wlan" "wlan0" "link"
        ;;
(...)

(...)

config led 'led_wlan'
        option name 'wlan'
        option sysfs 'u7628-01:green:wlan'
        option trigger 'netdev'
        option mode 'link'
        option dev 'wlan0'

config led 'led_usb'
        option name 'USB'
        option sysfs 'u7628-01:green:usb'
        option trigger 'usbdev'
        option interval '50'
        option dev '1-1'

config led 'led_wifi_led'
        option name 'wifi'
        option sysfs 'u7628-01:green:wlan'
        option trigger 'netdev'
        option mode 'link tx rx'
        option dev 'wlan0'