559b3df76f
The Elan touchpads over I2C/SMBus also can handle a trackstick. Unfortunately, nothing tells us if the device supports trackstick (the information lies in the PS/2 node), so rely on device properties to determine whether to enable the trackstick node. Link: https://bugzilla.redhat.com/show_bug.cgi?id=1313939 Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Acked-by: Rob Herring <robh@kernel.org> Acked-by: KT Liao <kt.liao@emc.com.tw> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
36 lines
1015 B
Plaintext
36 lines
1015 B
Plaintext
Elantech I2C Touchpad
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Required properties:
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- compatible: must be "elan,ekth3000".
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- reg: I2C address of the chip.
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- interrupt-parent: a phandle for the interrupt controller (see interrupt
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binding[0]).
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- interrupts: interrupt to which the chip is connected (see interrupt
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binding[0]).
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Optional properties:
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- wakeup-source: touchpad can be used as a wakeup source.
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- pinctrl-names: should be "default" (see pinctrl binding [1]).
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- pinctrl-0: a phandle pointing to the pin settings for the device (see
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pinctrl binding [1]).
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- vcc-supply: a phandle for the regulator supplying 3.3V power.
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- elan,trackpoint: touchpad can support a trackpoint (boolean)
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[0]: Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
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[1]: Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt
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Example:
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&i2c1 {
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/* ... */
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touchpad@15 {
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compatible = "elan,ekth3000";
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reg = <0x15>;
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interrupt-parent = <&gpio4>;
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interrupts = <0x0 IRQ_TYPE_EDGE_FALLING>;
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wakeup-source;
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};
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/* ... */
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};
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