tree f3652b1f9a163fb94f7fe1b315cbd29bf83946d1
parent f79446c62abc0dbff84152db55ff5699c5f11089
author Md Sadre Alam <mdalam@codeaurora.org> 1523970996 +0530
committer Md Sadre Alam <mdalam@codeaurora.org> 1524547268 +0530

ipq807x: board: Pass UUID of rootfs partion to kernel in bootargs

This change is for mounting the rootfs partition in kernel based
on UUID(Universally Unique IDentifier). In embedded system it is
common to store rootfs on SD card or eMMC. Typically the kernel
command line has like: root=/dev/mmcblk0p20 to tell the kernel
where to look for rootfs partition. The problem in this approach
is the eMMC device number can vary based on wether the SD card
present or not in the SD card slot. Also depending on kernel version
the eMMC device number can vary. This means passing the eMMC device
for specifying the rootfs location is not robust approach.
If SD card first get detected then the base minor 0 is assigned to
SD card and kernel will try to mount rootfs from SD card and if
there is no rootfs present on SD card then kernel fail to mount the
rootfs.

Change-Id: Ia9e6dded61292bed8a10a40fd3cb86f4026393eb
Signed-off-by: Md Sadre Alam <mdalam@codeaurora.org>