From mboxrd@z Thu Jan  1 00:00:00 1970
From: Lukasz Majewski <l.majewski@samsung.com>
Date: Fri, 17 Aug 2012 08:46:58 +0200
Subject: [U-Boot] [PATCH 2/3] cmd_partuuid: add command to retrieve a
 partition's UUID
In-Reply-To: <502D805C.5090809@wwwdotorg.org>
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	<1345158942-31512-2-git-send-email-swarren@wwwdotorg.org>
	<502D805C.5090809@wwwdotorg.org>
Message-ID: <20120817084658.3ea31f2a@amdc308.digital.local>
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To: u-boot@lists.denx.de

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.

> or create separate commands:
> 
> partuuid mmc 0:1
> part-get-bootable mmc 0


-- 
Best regards,

Lukasz Majewski

Samsung Poland R&D Center | Linux Platform Group