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

[Stephen Warren]

On 08/17/2012 12:46 AM, Lukasz Majewski wrote:
> Hi Stephen,
> 
>> 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
> 
> I'm now working at restoring the GPT (GUID Partition Table) at MMC in
> u-boot.
> 
> I plan to implement a separate command - gptrestore 
> However, I think that one single command would be more suitable for
> this purpose.

What will gptrestore do?