David Venhoff
cfcea9ee67
Based off b80915eb99
and compacted into a single commit so that it will fit on the uni git server
79 lines
1.9 KiB
Plaintext
79 lines
1.9 KiB
Plaintext
Device tree bindings for Microchip CAP11xx based capacitive touch sensors
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The node for this device must be a child of a I2C controller node, as the
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device communication via I2C only.
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Required properties:
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compatible: Must contain one of:
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"microchip,cap1106"
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"microchip,cap1126"
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"microchip,cap1188"
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reg: The I2C slave address of the device.
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interrupts: Property describing the interrupt line the
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device's ALERT#/CM_IRQ# pin is connected to.
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The device only has one interrupt source.
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Optional properties:
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autorepeat: Enables the Linux input system's autorepeat
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feature on the input device.
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microchip,sensor-gain: Defines the gain of the sensor circuitry. This
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effectively controls the sensitivity, as a
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smaller delta capacitance is required to
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generate the same delta count values.
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Valid values are 1, 2, 4, and 8.
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By default, a gain of 1 is set.
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microchip,irq-active-high: By default the interrupt pin is active low
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open drain. This property allows using the active
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high push-pull output.
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linux,keycodes: Specifies an array of numeric keycode values to
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be used for the channels. If this property is
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omitted, KEY_A, KEY_B, etc are used as
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defaults. The array must have exactly six
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entries.
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Example:
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i2c_controller {
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cap1106@28 {
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compatible = "microchip,cap1106";
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interrupt-parent = <&gpio1>;
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interrupts = <0 0>;
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reg = <0x28>;
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autorepeat;
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microchip,sensor-gain = <2>;
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linux,keycodes = <103>, /* KEY_UP */
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<106>, /* KEY_RIGHT */
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<108>, /* KEY_DOWN */
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<105>, /* KEY_LEFT */
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<109>, /* KEY_PAGEDOWN */
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<104>; /* KEY_PAGEUP */
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#address-cells = <1>;
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#size-cells = <0>;
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usr@0 {
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label = "cap11xx:green:usr0";
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reg = <0>;
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};
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usr@1 {
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label = "cap11xx:green:usr1";
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reg = <1>;
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};
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alive@2 {
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label = "cap11xx:green:alive";
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reg = <2>;
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linux,default_trigger = "heartbeat";
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};
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};
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}
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