[PATCH v3 6/6] cmd: Add MBR partition layout control utility

[Tom Rini]

On Wed, Dec 23, 2020 at 01:55:15PM +0100, Marek Szyprowski wrote:

> Add a 'mbr' command to let users create or verify MBR partition layout
> based on the provided text description. The partition layout is
> alternatively read from the 'mbr_parts' environment variable. This can be
> used in scripts to help system image flashing tools to ensure proper
> partition layout.
> 
> The syntax of the text description of the partition list is similar to
> the one used by the 'gpt' command. Supported parameters are: name
> (currently ignored), start (partition start offset in bytes), size (in
> bytes or '-' to expand it to the whole free area), bootable (boolean
> flag) and id (MBR partition type). If one wants to create more than 4
> partitions, an 'Extended' primary partition (with 0x05 ID) has to be
> explicitely provided as a one of the first 4 entries.
> 
> Here is an example how to create a 6 partitions (3 on the 'extended
> volume'), some of the predefined sizes:
> 
> > setenv mbr_parts 'name=boot,start=4M,size=128M,bootable,id=0x0e;
>   name=rootfs,size=3072M,id=0x83;
>   name=system-data,size=512M,id=0x83;
>   name=[ext],size=-,id=0x05;
>   name=user,size=-,id=0x83;
>   name=modules,size=100M,id=0x83;
>   name=ramdisk,size=8M,id=0x83'
> > mbr write mmc 0
> 
> Signed-off-by: Marek Szyprowski <m.szyprowski at samsung.com>

Applied to u-boot/master, thanks!

-- 
Tom
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