linux-kernel - [PATCH AUTOSEL for 4.9 127/156] platform/x86: hp

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Date:   Thu, 7 Dec 2017 15:49:27 +0000
From:   alexander.levin@...izon.com
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
Cc:     Osama Khan <osama.khan@...csson.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        alexander.levin@...izon.com
Subject: [PATCH AUTOSEL for 4.9 127/156] platform/x86: hp_accel: Add quirk for
 HP ProBook 440 G4

From: Osama Khan <osama.khan@...csson.com>

[ 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@...csson.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Signed-off-by: Sasha Levin <alexander.levin@...izon.com>
---
 drivers/platform/x86/hp_accel.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/platform/x86/hp_accel.c b/drivers/platform/x86/hp_accel.c
index 09356684c32f..abd9d83f6009 100644
--- a/drivers/platform/x86/hp_accel.c
+++ b/drivers/platform/x86/hp_accel.c
@@ -240,6 +240,7 @@ static const struct dmi_system_id lis3lv02d_dmi_ids[] = {
 	AXIS_DMI_MATCH("HDX18", "HP HDX 18", x_inverted),
 	AXIS_DMI_MATCH("HPB432x", "HP ProBook 432", xy_rotated_left),
 	AXIS_DMI_MATCH("HPB440G3", "HP ProBook 440 G3", x_inverted_usd),
+	AXIS_DMI_MATCH("HPB440G4", "HP ProBook 440 G4", x_inverted),
 	AXIS_DMI_MATCH("HPB442x", "HP ProBook 442", xy_rotated_left),
 	AXIS_DMI_MATCH("HPB452x", "HP ProBook 452", y_inverted),
 	AXIS_DMI_MATCH("HPB522x", "HP ProBook 522", xy_swap),
-- 
2.11.0