1* ST-Microelectronics FingerTip touchscreen controller 2 3The ST-Microelectronics FingerTip device provides a basic touchscreen 4functionality. Along with it the user can enable the touchkey which can work as 5a basic HOME and BACK key for phones. 6 7The driver supports also hovering as an absolute single touch event with x, y, z 8coordinates. 9 10Required properties: 11- compatible : must be "st,stmfts" 12- reg : I2C slave address, (e.g. 0x49) 13- interrupts : interrupt specification 14- avdd-supply : analogic power supply 15- vdd-supply : power supply 16- touchscreen-size-x : see touchscreen.txt 17- touchscreen-size-y : see touchscreen.txt 18 19Optional properties: 20- touch-key-connected : specifies whether the touchkey feature is connected 21- ledvdd-supply : power supply to the touch key leds 22 23Example: 24 25i2c@00000000 { 26 27 /* ... */ 28 29 touchscreen@49 { 30 compatible = "st,stmfts"; 31 reg = <0x49>; 32 interrupt-parent = <&gpa1>; 33 interrupts = <1 IRQ_TYPE_NONE>; 34 touchscreen-size-x = <1599>; 35 touchscreen-size-y = <2559>; 36 touch-key-connected; 37 avdd-supply = <&ldo30_reg>; 38 vdd-supply = <&ldo31_reg>; 39 ledvdd-supply = <&ldo33_reg>; 40 }; 41}; 42