WhyCan Forum(哇酷开发者社区)

是的

测试了没？

感谢楼主分享，另外根据经验常规做法不会是利用不喂狗重启的，因为看门狗重启是热启动，reboot一般设计成cold boot

及时雨啊，等会试一下。

使用WG，已经搞定了

感谢楼主，之前这个问题一直没解决。刚刚测试过，可以重启了！

thanks a lot for the tip!

# reboot
# Stopping network: OK
Saving random seed... done.
Stopping logging: OK
umount: devtmpfs busy - remounted read-only
The system is going down NOW!
Sent SIGTERM to all processes
Sent SIGKILL to   20.550344 reboot: Restarting system
   21.549981 Reboot failed -- System halted

修改设备树: (DockerLicheepi下面)
/work/c600/2.kernel/linux-f1c100s-480272lcd-test/arch/arm/boot/dts/suniv.dtsi

wdt: watchdog@1c20ca0 {

            compatible = "allwinner,sun6i-a31-wdt";

            reg = <0x01c20ca0 0x20>;

              };

修改为：
wdt: watchdog@1c20ca0 {

            compatible = "allwinner,sun6i-a31-wdt";

            reg = <0x01c20ca0 0x20>;

                        status = "okay";
              };

修改之后编译内核dts：
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- -j4 dtbs

上面不能解决问题！！！

==============================================================================
要是在配置linux内核时，未使能看门狗，而在系统restart的时候，主要是利用取消喂狗，来触发看门狗超时，从而引发复位。
    选择 → Device Drivers → Watchdog Timer Support  → WatchDog Timer Driver Core 和 Allwinner SoCs watchdog support

root@daeadcd74263:/work/c600/2.kernel/linux-f1c100s-480272lcd-test# make ARCH=arm menuconfig
---> Device Drivers
     * Watchdog Timer Support  --->
          ---> *   WatchDog Timer Driver Core
          ...
          ---> <*>   Allwinner SoCs watchdog support

保存退出再编译内核
root@daeadcd74263:/work/c600/2.kernel/linux-f1c100s-480272lcd-test# make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- -j4

问题解决了：

# 
# reboot
# Stopping network: OK
Saving random seed... done.
Stopping logging: OK
umount: devtmpfs busy - remounted read-only
The system is going down NOW!
Sent SIGTERM to all processes
Sent SIGKILL to[   21.795427] reboot: Restarting system

U-Boot SPL 2018.01 (Jul 08 2020 - 03:26:27)
DRAM: 32 MiB
Trying to boot from MMC1
Card did not respond to voltage select!
mmc_init: -95, time 22
spl: mmc init failed with error: -95
Trying to boot from sunxi SPI


U-Boot 2018.01 (Jul 08 2020 - 03:26:27 +0000) Allwinner Technology

CPU:   Allwinner F Series (SUNIV)
Model: Lichee Pi Nano
DRAM:  32 MiB
MMC:   SUNXI SD/MMC: 0
SF: Detected w25q128bv with page size 256 Bytes, erase size 4 KiB, total 16 MiB
*** Warning - bad CRC, using default environment

In:    serial@1c25000
Out:   serial@1c25000
Err:   serial@1c25000
Net:   No ethernet found.
starting USB...
No controllers found
Hit any key to stop autoboot:  0 
SF: Detected w25q128bv with page size 256 Bytes, erase size 4 KiB, total 16 MiB
device 0 offset 0x100000, size 0x4000
SF: 16384 bytes @ 0x100000 Read: OK
device 0 offset 0x110000, size 0x400000
SF: 4194304 bytes @ 0x110000 Read: OK
## Flattened Device Tree blob at 80c00000
   Booting using the fdt blob at 0x80c00000
   Loading Device Tree to 816fa000, end 816ff144 ... OK

Starting kernel ...