On Wed, Mar 02, 2011 at 03:42:33PM +0100, Linus Walleij wrote:

2011/3/2 Jamie Iles [off-list ref]:

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/sys/devices/system/soc/
/sys/devices/system/soc/unique_id<- Unified way to export an ID for all machs

Arbitrary number of bits? Some will have a 64-bit ID, some will have 32-bit
etc.

Should we say it's a hex string of 64 bits?

Could we provide hooks for the platform that takes the buffer and length
and let the platform do the snprintf()? ?Our devices have a 128-bit
serial number and I'm sure there must be others.

Isn't it better to just make it 64-bit so that apps can always parse it,
and then you can have your high-res numbers under mach?

If there is no solid ABI for this there is no point to make it
generic under /soc/unique_id at all.

I guess I'd argue that a arbitrary length hex string could be considered 
as a solid ABI but you're right that it's probably more important to get 
something out there and I'm probably being too picky, so apologies!

Jamie