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* Toradex Colibri VF50 Touchscreen driver
Required Properties:
- compatible must be toradex,vf50-touchscreen
- io-channels: adc channels being used by the Colibri VF50 module
IIO ADC for Y-, X-, Y+, X+ connections
- xp-gpios: FET gate driver for input of X+
- xm-gpios: FET gate driver for input of X-
- yp-gpios: FET gate driver for input of Y+
- ym-gpios: FET gate driver for input of Y-
- interrupt-parent: phandle for the interrupt controller
- interrupts: pen irq interrupt for touch detection, signal from X plate
- pinctrl-names: "idle", "default"
- pinctrl-0: pinctrl node for pen/touch detection, pinctrl must provide
pull-up resistor on X+, X-.
- pinctrl-1: pinctrl node for X/Y and pressure measurement (ADC) state pinmux
- vf50-ts-min-pressure: pressure level at which to stop measuring X/Y values
Example:
touchctrl: vf50_touchctrl {
compatible = "toradex,vf50-touchscreen";
io-channels = <&adc1 0>,<&adc0 0>,
<&adc0 1>,<&adc1 2>;
xp-gpios = <&gpio0 13 GPIO_ACTIVE_LOW>;
xm-gpios = <&gpio2 29 GPIO_ACTIVE_HIGH>;
yp-gpios = <&gpio0 12 GPIO_ACTIVE_LOW>;
ym-gpios = <&gpio0 4 GPIO_ACTIVE_HIGH>;
interrupt-parent = <&gpio0>;
interrupts = <8 IRQ_TYPE_LEVEL_LOW>;
pinctrl-names = "idle","default","gpios";
pinctrl-0 = <&pinctrl_touchctrl_idle>, <&pinctrl_touchctrl_gpios> ;
pinctrl-1 = <&pinctrl_touchctrl_default>, <&pinctrl_touchctrl_gpios>;
vf50-ts-min-pressure = <200>;
};
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