kernel-packages team mailing list archive

[Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>]

On Fri, 2015-02-06 at 22:18 +0000, Chris J Arges wrote:
> For the backports, are any other features needed like:
> 608b286d1ddf38a7ceb624d2b689af095816d91c ?
> 
> We can always merge these latter, but might make cherry-picking a bit
> easier if done now. : )

There's a number of things that would be handy to have for OpenPower
support and the above is one of them :) I can make you a list, we would
want the AST driver as well for BMC graphics but there are dependencies
I think on a bunch of other DRM changes so it might be easier if I
cooked you a backport myself.

I'll look into that early next week.

But don't hold the i2c stuff on that, there are people waiting on it
so we can tell OpenPower vendors that they can just use a standard
ubuntu image for manufacturing and use the i2c interface to program the
VPDs without having to build/install custom kernel packages.

Cheers,
Ben.

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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1419151

Title:
  OpenPower needs backport of PowerNV OPAL i2c driver

Status in linux package in Ubuntu:
  Confirmed
Status in linux source package in Trusty:
  Confirmed
Status in linux source package in Utopic:
  Confirmed

Bug description:
  [Impact]
  This exposes the i2c busses of the machine which are controlled via the OPAL firmware. This is among
  other things, necessary for manufacturing configuration of VPDs etc..., but will also enable Linux access
  to some i2c devices such as the TPM.

  We wish to have this in utopic and if possible trusty.

  [Fix]
  The Open Power machines need the driver that was merged in 3.19 backported. The commit upstream
  is 470834508f87877f680738a10a305280582c7aed "i2c: Driver to expose PowerNV platform i2c busses"
  $ git describe --contains 470834508f87877f680738a10a305280582c7aed
  v3.19-rc1~22^2~7

  [Test Case]
  modprobe i2c-opal

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