topic Re: reboot fail in i.MX Processors

reboot fail

tsgenius — Mon, 30 Jun 2014 04:07:17 GMT

Hi,everyone

I have got a reboot problem with IMX6Q sabresd on my custmer board and described as following:

1.Linux BSP 4.1.0,when I enter reboot command,system will reboot fail in most cases,only about 10 percentage system reboot success.I have refer the following site:

https://community.freescale.com/message/408776#408776

And comment out "bic r0, r0, #0x0006",but it is not useful.

2.Accidental,I tried BSP rel_imx_3.0.35_12.09.01,and find that reboot command always runs successfully.I have compared the following function with the two BSP:

arm_machine_restart cpu_proc_fin arch_reset

There are some differences in arch_reset.Then I modify BSP 4.1.0 code arch_reset function same as rel_imx_3.0.35_12.09.01's,but reboot command also fails in most cases

Anyone can help me?

Re: reboot fail

tsgenius — Mon, 30 Jun 2014 04:09:22 GMT

PS:reset command in u-boot runs successfully every time

Re: reboot fail

jimmychan — Thu, 03 Jul 2014 06:10:28 GMT

On sabresd board, it use WDOG2 output to reset external PMIC. If your board does not reboot properly, you can check your WDOG2 output pin config. For your information, please check the content of the patch "2270-ENGR00233366-4-WDOG-LDO_BYPASS-fix-wdog2-to-reset-ex.patch". You can find this patch in the linux/patches/ folder.