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* 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>;
};
};
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