1FocalTech EDT-FT5x06 Polytouch driver 2===================================== 3 4There are 3 variants of the chip for various touch panel sizes 5FT5206GE1 2.8" .. 3.8" 6FT5306DE4 4.3" .. 7" 7FT5406EE8 7" .. 8.9" 8FT5506EEG 7" .. 8.9" 9 10The software interface is identical for all those chips, so that 11currently there is no need for the driver to distinguish between the 12different chips. Nevertheless distinct compatible strings are used so 13that a distinction can be added if necessary without changing the DT 14bindings. 15 16 17Required properties: 18 - compatible: "edt,edt-ft5206" 19 or: "edt,edt-ft5306" 20 or: "edt,edt-ft5406" 21 or: "edt,edt-ft5506" 22 23 - reg: I2C slave address of the chip (0x38) 24 - interrupt-parent: a phandle pointing to the interrupt controller 25 serving the interrupt for this chip 26 - interrupts: interrupt specification for the touchdetect 27 interrupt 28 29Optional properties: 30 - reset-gpios: GPIO specification for the RESET input 31 - wake-gpios: GPIO specification for the WAKE input 32 33 - pinctrl-names: should be "default" 34 - pinctrl-0: a phandle pointing to the pin settings for the 35 control gpios 36 37 - threshold: allows setting the "click"-threshold in the range 38 from 20 to 80. 39 40 - gain: allows setting the sensitivity in the range from 0 to 41 31. Note that lower values indicate higher 42 sensitivity. 43 44 - offset: allows setting the edge compensation in the range from 45 0 to 31. 46 47Example: 48 polytouch: edt-ft5x06@38 { 49 compatible = "edt,edt-ft5406", "edt,edt-ft5x06"; 50 reg = <0x38>; 51 pinctrl-names = "default"; 52 pinctrl-0 = <&edt_ft5x06_pins>; 53 interrupt-parent = <&gpio2>; 54 interrupts = <5 IRQ_TYPE_EDGE_FALLING>; 55 reset-gpios = <&gpio2 6 GPIO_ACTIVE_LOW>; 56 wake-gpios = <&gpio4 9 GPIO_ACTIVE_HIGH>; 57 }; 58