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dt-bindings: add more optional properties for elan_i2c touchpads 

Some new touchpads IC are connected through PS/2 and I2C. On some of these
new IC, the I2C part doesn't have all of the information available.
We need to be able to forward the touchpad parameters from PS/2 and
thus, we need those new optional properties.

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 18:41:57 -07:00 committed by Dmitry Torokhov
parent fd1cf11f71
commit 303b3cf95e
1 changed files with 11 additions and 0 deletions
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11
Documentation/devicetree/bindings/input/elan_i2c.txt
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@ -13,9 +13,20 @@ Optional properties:
pinctrl binding [1]).
- vcc-supply: a phandle for the regulator supplying 3.3V power.
- elan,trackpoint: touchpad can support a trackpoint (boolean)
- elan,clickpad: touchpad is a clickpad (the entire surface is a button)
- elan,middle-button: touchpad has a physical middle button
- elan,x_traces: number of antennas on the x axis
- elan,y_traces: number of antennas on the y axis
- some generic touchscreen properties [2]:
* touchscreen-size-x
* touchscreen-size-y
* touchscreen-x-mm
* touchscreen-y-mm
[0]: Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
[1]: Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt
[2]: Documentation/devicetree/bindings/input/touchscreen/touchscreen.txt
Example:
&i2c1 {