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-Azoteq IQS550/572/525 Trackpad/Touchscreen Controller
-
-Required properties:
-
-- compatible : Must be equal to one of the following:
- "azoteq,iqs550"
- "azoteq,iqs572"
- "azoteq,iqs525"
-
-- reg : I2C slave address for the device.
-
-- interrupts : GPIO to which the device's active-high RDY
- output is connected (see [0]).
-
-- reset-gpios : GPIO to which the device's active-low NRST
- input is connected (see [1]).
-
-Optional properties:
-
-- touchscreen-min-x : See [2].
-
-- touchscreen-min-y : See [2].
-
-- touchscreen-size-x : See [2]. If this property is omitted, the
- maximum x-coordinate is specified by the
- device's "X Resolution" register.
-
-- touchscreen-size-y : See [2]. If this property is omitted, the
- maximum y-coordinate is specified by the
- device's "Y Resolution" register.
-
-- touchscreen-max-pressure : See [2]. Pressure is expressed as the sum of
- the deltas across all channels impacted by a
- touch event. A channel's delta is calculated
- as its count value minus a reference, where
- the count value is inversely proportional to
- the channel's capacitance.
-
-- touchscreen-fuzz-x : See [2].
-
-- touchscreen-fuzz-y : See [2].
-
-- touchscreen-fuzz-pressure : See [2].
-
-- touchscreen-inverted-x : See [2]. Inversion is applied relative to that
- which may already be specified by the device's
- FLIP_X and FLIP_Y register fields.
-
-- touchscreen-inverted-y : See [2]. Inversion is applied relative to that
- which may already be specified by the device's
- FLIP_X and FLIP_Y register fields.
-
-- touchscreen-swapped-x-y : See [2]. Swapping is applied relative to that
- which may already be specified by the device's
- SWITCH_XY_AXIS register field.
-
-[0]: Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
-[1]: Documentation/devicetree/bindings/gpio/gpio.txt
-[2]: Documentation/devicetree/bindings/input/touchscreen/touchscreen.txt
-
-Example:
-
- &i2c1 {
- /* ... */
-
- touchscreen@74 {
- compatible = "azoteq,iqs550";
- reg = <0x74>;
- interrupt-parent = <&gpio>;
- interrupts = <17 4>;
- reset-gpios = <&gpio 27 1>;
-
- touchscreen-size-x = <640>;
- touchscreen-size-y = <480>;
-
- touchscreen-max-pressure = <16000>;
- };
-
- /* ... */
- };