platform/x86: hp_accel: Add quirk for HP ProBook 440 G4
authorOsama Khan <osama.khan@ericsson.com>
Sat, 21 Oct 2017 10:42:21 +0000 (10:42 +0000)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 20 Dec 2017 09:10:31 +0000 (10:10 +0100)
commit21cd9fe750941100b7b4643ffd765215b6daff64
treedd9fe71543dc38289799e1e3cbe871ac0071b6e0
parent6bd7a9bc48ac642cb3ded1e40fcfee44c8a0aa1a
platform/x86: hp_accel: Add quirk for HP ProBook 440 G4

[ Upstream commit 163ca80013aafb6dc9cb295de3db7aeab9ab43f8 ]

Added support for HP ProBook 440 G4 laptops by including the accelerometer
orientation quirk for that device. Testing was performed based on the
axis orientation guidelines here:
https://www.kernel.org/doc/Documentation/misc-devices/lis3lv02d
which states "If the left side is elevated, X increases (becomes positive)".

When tested, on lifting the left edge, x values became increasingly negative
thus indicating an inverted x-axis on the installed lis3lv02d chip.
This was compensated by adding an entry for this device in hp_accel.c
specifying the quirk as x_inverted. The patch was tested on a
ProBook 440 G4 device and x-axis as well as y and z-axis values are now
generated as per spec.

Signed-off-by: Osama Khan <osama.khan@ericsson.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/platform/x86/hp_accel.c