Re: [PATCH 10/14] ps3: get firmware version

Geoff Levand wrote:

Nathan Lynch wrote:

quoted

Benjamin Herrenschmidt wrote:

quoted

quoted

Anyway, that is the need, the question is where to make it
available.  I thought /proc/cpuinfo already has the platform type
(coming from the generic powerpc code), so it would be convenient
for utilities to have the firmware version there too.  I don't
think parsing the dmsg is an option for minimal configs like
bootloaders and distro installers, as they may not keep the boot
messages around, and in general doesn't seem a reliable way.  If
you can make a suggestion, I'd like to hear it.

Yeah, /proc/cpuinfo is actually a fairly convenient place for that...

Other firmwares provide a property in the device tree with version
information, for example on Power5:

But this firmware does not.  The kernel must do it sometime after
startup.  I don't see any reason why the kernel should try to
emulate the behavior of firmware on some other platform.

Actually, now that I think about it, your suggestion seems like the best
way to do it :-) 

Since /proc/device-tree/model gives the model, and I can arrange for
/proc/device-tree/firmware to give a firmware version.  I'll just need to
add a property to the tree after bootup.

-Geoff