1*4882a593SmuzhiyunAzoteq IQS550/572/525 Trackpad/Touchscreen Controller 2*4882a593Smuzhiyun 3*4882a593SmuzhiyunRequired properties: 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun- compatible : Must be equal to one of the following: 6*4882a593Smuzhiyun "azoteq,iqs550" 7*4882a593Smuzhiyun "azoteq,iqs572" 8*4882a593Smuzhiyun "azoteq,iqs525" 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun- reg : I2C slave address for the device. 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun- interrupts : GPIO to which the device's active-high RDY 13*4882a593Smuzhiyun output is connected (see [0]). 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun- reset-gpios : GPIO to which the device's active-low NRST 16*4882a593Smuzhiyun input is connected (see [1]). 17*4882a593Smuzhiyun 18*4882a593SmuzhiyunOptional properties: 19*4882a593Smuzhiyun 20*4882a593Smuzhiyun- touchscreen-min-x : See [2]. 21*4882a593Smuzhiyun 22*4882a593Smuzhiyun- touchscreen-min-y : See [2]. 23*4882a593Smuzhiyun 24*4882a593Smuzhiyun- touchscreen-size-x : See [2]. If this property is omitted, the 25*4882a593Smuzhiyun maximum x-coordinate is specified by the 26*4882a593Smuzhiyun device's "X Resolution" register. 27*4882a593Smuzhiyun 28*4882a593Smuzhiyun- touchscreen-size-y : See [2]. If this property is omitted, the 29*4882a593Smuzhiyun maximum y-coordinate is specified by the 30*4882a593Smuzhiyun device's "Y Resolution" register. 31*4882a593Smuzhiyun 32*4882a593Smuzhiyun- touchscreen-max-pressure : See [2]. Pressure is expressed as the sum of 33*4882a593Smuzhiyun the deltas across all channels impacted by a 34*4882a593Smuzhiyun touch event. A channel's delta is calculated 35*4882a593Smuzhiyun as its count value minus a reference, where 36*4882a593Smuzhiyun the count value is inversely proportional to 37*4882a593Smuzhiyun the channel's capacitance. 38*4882a593Smuzhiyun 39*4882a593Smuzhiyun- touchscreen-fuzz-x : See [2]. 40*4882a593Smuzhiyun 41*4882a593Smuzhiyun- touchscreen-fuzz-y : See [2]. 42*4882a593Smuzhiyun 43*4882a593Smuzhiyun- touchscreen-fuzz-pressure : See [2]. 44*4882a593Smuzhiyun 45*4882a593Smuzhiyun- touchscreen-inverted-x : See [2]. Inversion is applied relative to that 46*4882a593Smuzhiyun which may already be specified by the device's 47*4882a593Smuzhiyun FLIP_X and FLIP_Y register fields. 48*4882a593Smuzhiyun 49*4882a593Smuzhiyun- touchscreen-inverted-y : See [2]. Inversion is applied relative to that 50*4882a593Smuzhiyun which may already be specified by the device's 51*4882a593Smuzhiyun FLIP_X and FLIP_Y register fields. 52*4882a593Smuzhiyun 53*4882a593Smuzhiyun- touchscreen-swapped-x-y : See [2]. Swapping is applied relative to that 54*4882a593Smuzhiyun which may already be specified by the device's 55*4882a593Smuzhiyun SWITCH_XY_AXIS register field. 56*4882a593Smuzhiyun 57*4882a593Smuzhiyun[0]: Documentation/devicetree/bindings/interrupt-controller/interrupts.txt 58*4882a593Smuzhiyun[1]: Documentation/devicetree/bindings/gpio/gpio.txt 59*4882a593Smuzhiyun[2]: Documentation/devicetree/bindings/input/touchscreen/touchscreen.txt 60*4882a593Smuzhiyun 61*4882a593SmuzhiyunExample: 62*4882a593Smuzhiyun 63*4882a593Smuzhiyun &i2c1 { 64*4882a593Smuzhiyun /* ... */ 65*4882a593Smuzhiyun 66*4882a593Smuzhiyun touchscreen@74 { 67*4882a593Smuzhiyun compatible = "azoteq,iqs550"; 68*4882a593Smuzhiyun reg = <0x74>; 69*4882a593Smuzhiyun interrupt-parent = <&gpio>; 70*4882a593Smuzhiyun interrupts = <17 4>; 71*4882a593Smuzhiyun reset-gpios = <&gpio 27 1>; 72*4882a593Smuzhiyun 73*4882a593Smuzhiyun touchscreen-size-x = <640>; 74*4882a593Smuzhiyun touchscreen-size-y = <480>; 75*4882a593Smuzhiyun 76*4882a593Smuzhiyun touchscreen-max-pressure = <16000>; 77*4882a593Smuzhiyun }; 78*4882a593Smuzhiyun 79*4882a593Smuzhiyun /* ... */ 80*4882a593Smuzhiyun }; 81