[deliverable/linux.git] / Documentation / devicetree / bindings / input / atmel,maxtouch.txt

Atmel maXTouch touchscreen/touchpad

Required properties:
- compatible:
    atmel,maxtouch

- reg: The I2C address of the device

- interrupts: The sink for the touchpad's IRQ output
    See ../interrupt-controller/interrupts.txt

Optional properties for main touchpad device:

- linux,gpio-keymap: When enabled, the SPT_GPIOPWN_T19 object sends messages
    on GPIO bit changes. An array of up to 8 entries can be provided
    indicating the Linux keycode mapped to each bit of the status byte,
    starting at the LSB. Linux keycodes are defined in
    <dt-bindings/input/input.h>.

    Note: the numbering of the GPIOs and the bit they start at varies between
    maXTouch devices. You must either refer to the documentation, or
    experiment to determine which bit corresponds to which input. Use
    KEY_RESERVED for unused padding values.

Example:

	touch@4b {
		compatible = "atmel,maxtouch";
		reg = <0x4b>;
		interrupt-parent = <&gpio>;
		interrupts = <TEGRA_GPIO(W, 3) IRQ_TYPE_LEVEL_LOW>;
	};
Commit	Line	Data
78188be3 SW	1	Atmel maXTouch touchscreen/touchpad
	2
	3	Required properties:
	4	- compatible:
	5	atmel,maxtouch
	6
	7	- reg: The I2C address of the device
	8
	9	- interrupts: The sink for the touchpad's IRQ output
	10	See ../interrupt-controller/interrupts.txt
	11
	12	Optional properties for main touchpad device:
	13
f5940231 ND	14	- linux,gpio-keymap: When enabled, the SPT_GPIOPWN_T19 object sends messages
	15	on GPIO bit changes. An array of up to 8 entries can be provided
	16	indicating the Linux keycode mapped to each bit of the status byte,
	17	starting at the LSB. Linux keycodes are defined in
	18	<dt-bindings/input/input.h>.
	19
	20	Note: the numbering of the GPIOs and the bit they start at varies between
	21	maXTouch devices. You must either refer to the documentation, or
	22	experiment to determine which bit corresponds to which input. Use
	23	KEY_RESERVED for unused padding values.
	24
78188be3 SW	25	Example:
	26
	27	touch@4b {
	28	compatible = "atmel,maxtouch";
	29	reg = <0x4b>;
	30	interrupt-parent = <&gpio>;
	31	interrupts = <TEGRA_GPIO(W, 3) IRQ_TYPE_LEVEL_LOW>;
	32	};