[SRU][B/C/D/OEM-OSP1-B/E][PATCH 0/1] input/mouse: alps trackpoint-only device doesn't work

[Hui Wang]

BugLink: https://bugs.launchpad.net/bugs/1836752

This patch is needed to be merged to oem-osp1-b kernel ASAP, since
our oem project is waiting for this patch.

[Impact]
On one of the latest Lenovo laptops, the trackpoint doesn't work, we
consulted apls guys, they said this trackpoint is different from others,
it is a trackpoint-only device, so the current alps.c doesn't support it
well, while the trackpoint.c can drive it well.

[Fix]
Check if it is trakcpoint-only device, if it yes, let trackpoint.c
handle it.

[Test Case]
apply this patch and boot with the kernel, the trackpoint can work
well.

[Regression Risk]
Low. the way of detect trackpoint-only alps device is provided by
alps. so it is pretty safe.


Hui Wang (1):
  Input: alps - don't handle ALPS cs19 trackpoint-only device

 drivers/input/mouse/alps.c | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

-- 
2.17.1