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Diffstat (limited to 'Documentation/devicetree/bindings/input/touchscreen/colibri-vf50-ts.txt')
| -rw-r--r-- | Documentation/devicetree/bindings/input/touchscreen/colibri-vf50-ts.txt | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/input/touchscreen/colibri-vf50-ts.txt b/Documentation/devicetree/bindings/input/touchscreen/colibri-vf50-ts.txt new file mode 100644 index 000000000..ca304357c --- /dev/null +++ b/Documentation/devicetree/bindings/input/touchscreen/colibri-vf50-ts.txt @@ -0,0 +1,34 @@ +* 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- +- 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"; + pinctrl-0 = <&pinctrl_touchctrl_idle>, <&pinctrl_touchctrl_gpios>; + pinctrl-1 = <&pinctrl_touchctrl_default>, <&pinctrl_touchctrl_gpios>; + vf50-ts-min-pressure = <200>; + }; |