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

Hui Wang hui.wang at canonical.com
Tue Jul 16 14:12:56 UTC 2019

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.

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.

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

[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(+)


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