Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / Documentation / devicetree / bindings / input / cap11xx.txt

diff --git a/kernel/Documentation/devicetree/bindings/input/cap11xx.txt b/kernel/Documentation/devicetree/bindings/input/cap11xx.txt
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+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 */
+       };
+}