i.MX Processorsのトピックimx6ul

imx6ul

srinu_inaganti — Tue, 25 Feb 2020 07:22:58 GMT

1. How uboot changes to the new partition when kernel fails to start.

2. kernel changes any boot arguments to notify the uboot ?

Re: imx6ul

Rita_Wang — Thu, 27 Feb 2020 09:37:31 GMT

Could you tell us which version of BSP are you using?

Re: imx6ul

Rita_Wang — Thu, 27 Feb 2020 09:47:49 GMT

Have you download images success to your board? Here you can send us your fail log.

Re: imx6ul

radhikasomaiya — Fri, 06 Mar 2020 09:17:12 GMT

Hi srinu.inaganti@ltts.com ,

For roll back to another kernel in case of failure/crash of current kernel, you can do below things(just a raw idea):

1) Create two partition scheme both will have zImage and dtb.

2) Change the boot partition from u-boot. (change mmcdev and mmcpart env variables)

3) To automatically detect the kernel failure you can use the bootcount and bootlimit variables in u-boot and implement the mechanism to switch automatically.

For further understanding of the same in detail please refer to the SWUpdate: software update for embedded system — Embedded Software Update Documentation 2019.11 documentation .

Regards,

Radhika Somaiya.