| FocalTech touch controller |
| |
| The focaltech controller is connected to host processor via i2c. |
| The controller generates interrupts when the user touches the panel. |
| The host controller is expected to read the touch coordinates over |
| i2c and pass the coordinates to the rest of the system. |
| |
| Required properties: |
| - compatible : should be "focaltech,fts" |
| - reg : i2c slave address of the device, should be <0x38> |
| - interrupt-parent : parent of interrupt |
| - interrupts : irq gpio, "0x02" stands for that the irq triggered by falling edge. |
| - focaltech,irq-gpio : irq gpio, same as "interrupts" node. |
| - focaltech,reset-gpio : reset gpio |
| - focaltech,num-max-touches : maximum number of touches support |
| - focaltech,display-coords : display resolution in pixels. A four tuple consisting of minX, minY, maxX and maxY. |
| |
| Optional properties: |
| - focaltech,have-key : specify if virtual keys are supported |
| - focaltech,key-number : number of keys |
| - focaltech,keys : virtual key codes mapping to the coords |
| - focaltech,key-y-coord : constant y coordinate of keys, depends on the y resolution |
| - focaltech,key-x-coords : constant x coordinates of keys, depends on the x resolution |
| - focaltech,swap-xy : swap x-y coordinates |
| - focaltech,panel-type : set panel type, default is FT5416 panel |
| - focaltech,scaling-down-half : scale down the x-y coordiantes to half |
| |
| |
| Example: |
| i2c@f9927000 { |
| focaltech@38{ |
| compatible = "focaltech,fts"; |
| reg = <0x38>; |
| interrupt-parent = <&msm_gpio>; |
| interrupts = <13 0x02>; |
| focaltech,reset-gpio = <&msm_gpio 12 0x01>; |
| focaltech,irq-gpio = <&msm_gpio 13 0x02>; |
| focaltech,max-touch-number = <5>; |
| focaltech,display-coords = <0 0 1080 1920>; |
| |
| focaltech,have-key; |
| focaltech,key-number = <3>; |
| focaltech,keys = <139 102 158>; |
| focaltech,key-y-coord = <2000>; |
| focaltech,key-x-coords = <200 600 800>; |
| focaltech,swap-xy; |
| }; |
| }; |
