The rofs squashfs currently loaded by the kernel of openbmc is very inconvenient to debug because squashfs is a read-only file system. I made a jffs2 file system, after modifying the bootarg parameters of uboot, the kernel still loads squashfs.

How to let openbmc's kernel load jffs2 file system?

bootargs=‘console=ttyS4,115200n8 noinitrd root=/dev/mtdblock4 rw rootfstype=jffs2’