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 ```1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 ``` ``````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>; }; /* ... */ }; ``````