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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

This bug is missing log files that will aid in diagnosing the problem.
>From a terminal window please run:

apport-collect 1518855

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1518855

Title:
  Backport better suspend/resume function for pinctrl-cherryview

Status in HWE Next:
  New
Status in linux package in Ubuntu:
  Incomplete

Bug description:
  [Impact]
  On some platforms the touchpad relies on pinctrl devices to provide GPIO interrupt, but in 3.19.0 pinctrl-cherryview doesn't support suspend well and will lose the config after suspend/resume, then touchpad can't be used.

  [Fix]
  There's a commit in 4.0-rc1 to add suspend/resume for pinctrl-cherryview:

  commit 9eb457b547cc731bc2fc251bd79891a60c64fc3e
  Refs: [HEAD]
  Author: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>
  Date: Thu Dec 4 12:32:50 2014 +0200

      pinctrl: cherryview: Save and restore pin configs over system sle

  which can be clean cherry-picked

  [Test]
  3.19.0-33 -> failed
  4.2-> passed
  4.0, 4.1 -> Can't suspend due to graphic driver failed so can't use to test
  3.19.0-33 + patched module -> passed

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