Re: Expose system Serial Number to userspace.

[Nicolas Pitre <nico@fluxnic.net>]

On Wed, 29 Aug 2012, Brad Arnold wrote:

> On Wed, Aug 29, 2012 at 9:50 AM, Nicolas Pitre <nico@fluxnic.net> wrote:
> >
> > On Wed, 29 Aug 2012, Brad Arnold wrote:
> >
> > > Hi,
> > >
> > > I'm working on an embedded board which uses u-boot + linux. At
> > > manufacturing time, the device serial number will be programmed into OTP
> > > memory on NAND (probably from within u-boot). We'd like the linux kernel
> > > to make this serial number available to be read from userspace. Is there
> > > an accepted method to do this sort of thing?
> >
> > A serial number field is available from /proc/cpuinfo already.  you just
> > have to initialize it through the system_serial_high and
> > system_serial_low global variables.
> >
> >
> > Nicolas
> 
> Actually, I guess even better than initializing through the two
> variables is to pass the serial directly from u-boot using the tag.

Yes, if you are still using ATAGs.


Nicolas