From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- .../devicetree/bindings/input/cap11xx.txt | 59 ++++++++++++++++++++++ 1 file changed, 59 insertions(+) create mode 100644 Documentation/devicetree/bindings/input/cap11xx.txt (limited to 'Documentation/devicetree/bindings/input/cap11xx.txt') diff --git a/Documentation/devicetree/bindings/input/cap11xx.txt b/Documentation/devicetree/bindings/input/cap11xx.txt new file mode 100644 index 000000000..7d0a30097 --- /dev/null +++ b/Documentation/devicetree/bindings/input/cap11xx.txt @@ -0,0 +1,59 @@ +Device tree bindings for Microchip CAP11xx based capacitive touch sensors + +The node for this device must be a child of a I2C controller node, as the +device communication via I2C only. + +Required properties: + + compatible: Must contain one of: + "microchip,cap1106" + "microchip,cap1126" + "microchip,cap1188" + + reg: The I2C slave address of the device. + + interrupts: Property describing the interrupt line the + device's ALERT#/CM_IRQ# pin is connected to. + The device only has one interrupt source. + +Optional properties: + + autorepeat: Enables the Linux input system's autorepeat + feature on the input device. + + microchip,sensor-gain: Defines the gain of the sensor circuitry. This + effectively controls the sensitivity, as a + smaller delta capacitance is required to + generate the same delta count values. + Valid values are 1, 2, 4, and 8. + By default, a gain of 1 is set. + + microchip,irq-active-high: By default the interrupt pin is active low + open drain. This property allows using the active + high push-pull output. + + linux,keycodes: Specifies an array of numeric keycode values to + be used for the channels. If this property is + omitted, KEY_A, KEY_B, etc are used as + defaults. The array must have exactly six + entries. + +Example: + +i2c_controller { + cap1106@28 { + compatible = "microchip,cap1106"; + interrupt-parent = <&gpio1>; + interrupts = <0 0>; + reg = <0x28>; + autorepeat; + microchip,sensor-gain = <2>; + + linux,keycodes = <103>, /* KEY_UP */ + <106>, /* KEY_RIGHT */ + <108>, /* KEY_DOWN */ + <105>, /* KEY_LEFT */ + <109>, /* KEY_PAGEDOWN */ + <104>; /* KEY_PAGEUP */ + }; +} -- cgit v1.2.3-54-g00ecf