imx6q-sabresd板子在3.14.52版本reboot命令不成功
赵文彬龙 2016-12-08 09:28:17 你好:
板子相关信息:imx6q
内核版本:3.14.52
我在板子启动之后执行reboot命令:
root@imx6qsabresd:/# reboot
The system is going down for reboot NOW! (ttymxc0) (Thu Sep 1 09:57:12 2016)
INIT: Switching to runlevel: 6
INIT: Sending processes the TERM signal
root@imx6qsabresd:/# Stopping Dropbear SSH server: stopped /usr/sbin/dropbear (pid 428)
dropbear.
* Stopping Avahi mDNS/DNS-SD Daemon: avahi-daemon
** (oprofile-server:487): WARNING **: Avahi error: Daemon connection fail[ ok ]
Stopping advanced power management daemon: no /usr/sbin/apmd found; none killed
apmd.
Stopping system message bus: dbus.
stopping mountd: done
stopping nfsd: done
Stopping OProfileUI server
Stopping syslogd/klogd: stopped syslogd (pid 456)
stopped klogd (pid 459)
done
stopping statd: done
Stopping Telephony daemon
ALSA: Storing mixer settings...
Stopping rpcbind daemon...
done.
Stopping Linux NFC daemon
Deconfiguring network interfaces... done.
Sending all processes the TERM signal...
logout
Sending all processes the KILL signal...
Unmounting remote filesystems...
Deactivating swap...
Unmounting local filesystems...
Rebooting... reboot: Restarting system
mxc_restart: Watchdog reset failed to assert reset
就卡在这个了地方。
我的板子运行频率是800Mhz,那个看门狗选择的工作模式是ldo-bypass ,看门狗2。
首先板子应该没有问题的,运行3.0.35的时候是reboot正常的,一切OK。就是3.14.52不成功。
我直接操作寄存器验证如下:
在打断uboot正常启动之后直接:=> mw.w 0x20bc000 0x34,可以正常复位启动,并且打印说Reset cause: WDOG。
在启动系统之后执行:root@imx6qsabresd:~# /unit_tests/memtool -16 0x20bc000=0x34
root@imx6qsabresd:~# /unit_tests/memtool -16 0x20bc000=0x34
Writing 16-bit value 0x34 to address 0x020BC000
root@imx6qsabresd:~#
U-Boot 2015.04-imx_v2015.04_3.14.52_1.1.0_ga+g6cf684a (Sep 02 2016 - 18:29:31)
CPU: Freescale i.MX6Q rev1.5 at 792 MHz
CPU: Temperature 49 C
Reset cause: WDOG
Board: MX6-SabreSD
I2C: ready
DRAM: 1 GiB
执行到这个地方就不动了!!能否给点建议!!谢.