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| -rw-r--r-- | Documentation/devicetree/bindings/input/elan_i2c.txt | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/input/elan_i2c.txt b/Documentation/devicetree/bindings/input/elan_i2c.txt new file mode 100644 index 000000000..996324770 --- /dev/null +++ b/Documentation/devicetree/bindings/input/elan_i2c.txt @@ -0,0 +1,44 @@ +Elantech I2C Touchpad + +Required properties: +- compatible: must be "elan,ekth3000". +- reg: I2C address of the chip. +- interrupts: interrupt to which the chip is connected (see interrupt + binding[0]). + +Optional properties: +- wakeup-source: touchpad can be used as a wakeup source. +- pinctrl-names: should be "default" (see pinctrl binding [1]). +- pinctrl-0: a phandle pointing to the pin settings for the device (see + 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 { + /* ... */ + + touchpad@15 { + compatible = "elan,ekth3000"; + reg = <0x15>; + interrupt-parent = <&gpio4>; + interrupts = <0x0 IRQ_TYPE_EDGE_FALLING>; + wakeup-source; + }; + + /* ... */ + }; |