forked from Minki/linux
54 lines
1.4 KiB
Plaintext
54 lines
1.4 KiB
Plaintext
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Device tree bindings for Microchip CAP1106, 6 channel capacitive touch sensor
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The node for this driver 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 be "microchip,cap1106"
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reg: The I2C slave address of the device.
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Only 0x28 is valid.
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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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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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};
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}
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