This just merged into ToT here at the CL below (I'm not sure why it didn't post here)

https://chrome-internal-review.googlesource.com/#/c/265615/


This is an urgent fix to revert a bad touchpad firmware that is completely stopping some Gnawty users' touchpads from working.  We really need to merge this back to 51 and 52 to get these users' touchpads functional again as soon as possible.  The touchpad firmware that this CL reverts it to was the one used previously, so it's known to work.  (The newest FW, that caused the issue, was introduced to fix a rare bug with the click button under the touchpad.  It's far less common and severe than the bug it introduced though, so we need to revert it quickly and then we'll add a version with both fixes later)

Thanks,
Charlie

The following revision refers to this bug:
  https://chrome-internal.googlesource.com/chromeos/overlays/overlay-gnawty-private/+/f1d7bebb33515feaa1a72973554d1fd3472e1706

commit f1d7bebb33515feaa1a72973554d1fd3472e1706
Author: Charlie Mooney <charliemooney@chromium.org>
Date: Mon Jun 20 17:41:05 2016

The following revision refers to this bug:
  https://chrome-internal.googlesource.com/chromeos/overlays/overlay-gnawty-private/+/f3f1158e84991d9dd5574f159036b2d1e6294b28

commit f3f1158e84991d9dd5574f159036b2d1e6294b28
Author: Charlie Mooney <charliemooney@chromium.org>
Date: Mon Jun 20 17:41:05 2016

It turns out the offending patch didn't make it into 51 for Gnawty, so there's no need to revert it there.

That means the faulty firmware has been reverted everywhere it exists for Gnawty.  Now we just have to wait for a new FW from Elan to replace it with

Your change meets the bar and is auto-approved for M52 (branch: 2743)

Merged, thanks

The firmware is reverted to 6.0; marking as Fixed.  This fix is now out to all channels.