Re: [PATCH/RFC] ARM: OMAP: unlock flash device during boot

[Nishanth Menon <menon.nishanth@gmail.com>]

Kevin Hilman stated on 10/18/2007 9:30 AM:
> Woodruff, Richard wrote:
>> Long ago when the part size changed one version of the omap-nor driver did need to unlock partitions.  This was done on some internal tree version.
>>
>> By partitions I mean physical ones, inside the NOR part.  Not mtd_partitions().  This only needed to be done on a per-partition basis not a per-sector one.
>>
>> These physical partitions, allow for simultaneous XIP and programming on the same NOR chip.  One partition can be in status mode while another has code executing out of it.  
>>
>> It kind of looks like this patch was aiming to do this.
> 
> FWIW, this patch was taken from the TI kernels on linux.omap.com which
> have the same call to unlock in the probe hook.
> 
I recollect some time back we had a similar discussion on a possibility of:
a) partition 1 (boot readonly partition) having a basic filesystem which
would unlock partition 2
b) partition 2: read/write which would contain all the stuff that
filesystem would like to move around.

This would allow for map drivers to do nothing special on bootup.

Regards,
Nishanth Menon