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Input: elantech/SMBus - export all capabilities from the PS/2 node

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The recent touchpads might not have all the information regarding the
characteristics through the I2C port.
On some Lenovo t480s, this results in the touchpad not being detected
as a clickpad, and on the Lenovo P52, this results in a failure while
fetching the resolution through I2C.

We need to imitate the Windows behavior: fetch the data under PS/2, and
limit the querries under I2C.

This patch prepares this by exporting the info from PS/2.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Benjamin Tissoires
2019-05-27 18:43:49 -07:00
committed by Dmitry Torokhov
parent e3a9a12906
commit 3abcc5329a
2 changed files with 44 additions and 5 deletions
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2
drivers/input/mouse/elantech.h
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@@ -150,6 +150,8 @@ struct elantech_device_info {
unsigned int y_max;
unsigned int x_res;
unsigned int y_res;
unsigned int x_traces;
unsigned int y_traces;
unsigned int width;
unsigned int bus;
bool paritycheck;