How to get which partition need update when update rootfs by swupdate

[wang12zhe]

HW：IMX8QXP EVK

I want to update IMX8QXP rootfs by swupdate software.
There are 4 partitions:
brw-rw---- 1 root disk 179, 97 Mar 24 10:25 /dev/mmcblk1p1 //Image and dtb is here
brw-rw---- 1 root disk 179, 98 Mar 24 10:25 /dev/mmcblk1p2 //rootfs A is here
brw-rw---- 1 root disk 179, 99 Mar 24 10:25 /dev/mmcblk1p3 //Image and dtb is here
brw-rw---- 1 root disk 179, 100 Mar 24 10:53 /dev/mmcblk1p4 // rootfs B is here

1. After system start swupdate how to konw which rootfs is used now(rootfs A? rootfs B ?)
2. How to let swupdate know update the rootfs to which partition /dev/mmcblk1p2? /dev/mmcblk1p4?
3. How to update the bootargs to match the updated partition

[Zhiming_Liu · Accepted solution]

Hi @wang12zhe 

You can refer this knowledge base:

https://community.nxp.com/t5/i-MX-Processors-Knowledge-Base/SWUpdate-OTA-i-MX8MM-EVK-i-MX8QXP-MEK/ta...