Kernel-4.18.0-80.el8_st,stmfts

• ST-Microelectronics FingerTip touchscreen controller

The ST-Microelectronics FingerTip device provides a basic touchscreen
functionality. Along with it the user can enable the touchkey which can work as
a basic HOME and BACK key for phones.

The driver supports also hovering as an absolute single touch event with x, y, z
coordinates.

Required properties:

• compatible : must be “st,stmfts”
• reg : I2C slave address, (e.g. 0x49)
• interrupt-parent : the phandle to the interrupt controller which provides

          the interrupt
  

• interrupts : interrupt specification
• avdd-supply : analogic power supply
• vdd-supply : power supply
• touchscreen-size-x : see touchscreen.txt
• touchscreen-size-y : see touchscreen.txt

Optional properties:

• touch-key-connected : specifies whether the touchkey feature is connected
• ledvdd-supply : power supply to the touch key leds

Example:

i2c@00000000 {

/* ... */

touchscreen@49 {
    compatible = "st,stmfts";
    reg = <0x49>;
    interrupt-parent = <&gpa1>;
    interrupts = <1 IRQ_TYPE_NONE>;
    touchscreen-size-x = <1599>;
    touchscreen-size-y = <2559>;
    touch-key-connected;
    avdd-supply = <&ldo30_reg>;
    vdd-supply = <&ldo31_reg>;
    ledvdd-supply = <&ldo33_reg>;
};

};