[U-Boot] [PATCH 2/3] cmd_partuuid: add command to retrieve a partition's UUID

[Stephen Warren <swarren@wwwdotorg.org>]

On 08/16/2012 05:15 PM, Stephen Warren wrote:
> This implements the following:
> 
> partuuid mmc 0:1
>   -> prints the partition's UUID.
> partuuic mmc 0:1 uuid
>   -> sets environment variable "uuid" to the partition's UUID.
> 
> This can be useful when writing a bootcmd which searches all known
> devices for something bootable, and then wants the kernel to use the
> same partition as the root device, e.g.:
> 
> partuuid ${devtype} ${devnum}:${rootpart} uuid
> setenv bootargs root=PARTUUID=${uuid} ...

I guess one thing I might mention here:

I can imagine other partition-oriented commands existing, e.g. a command
to find the bootable partition on a particular storage device. I'm not
sure if we should create a single "part" command with various
sub-options for this, e.g.:

part uuid mmc 0:1
part get-bootable mmc 0

or create separate commands:

partuuid mmc 0:1
part-get-bootable mmc 0