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a212f5ca57
Clarify properties definition, drop unused pinctrl-2 state 'gpio'. Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com> Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com> Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Link: https://lore.kernel.org/r/20220712101619.326120-3-francesco.dolcini@toradex.com Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
35 lines
1.3 KiB
Plaintext
35 lines
1.3 KiB
Plaintext
* Toradex Colibri VF50 Touchscreen driver
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Required Properties:
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- compatible must be toradex,vf50-touchscreen
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- io-channels: adc channels being used by the Colibri VF50 module
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IIO ADC for Y-, X-, Y+, X+ connections
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- xp-gpios: FET gate driver for input of X+
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- xm-gpios: FET gate driver for input of X-
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- yp-gpios: FET gate driver for input of Y+
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- ym-gpios: FET gate driver for input of Y-
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- interrupts: pen irq interrupt for touch detection, signal from X plate
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- pinctrl-names: "idle", "default"
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- pinctrl-0: pinctrl node for pen/touch detection, pinctrl must provide
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pull-up resistor on X+, X-.
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- pinctrl-1: pinctrl node for X/Y and pressure measurement (ADC) state pinmux
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- vf50-ts-min-pressure: pressure level at which to stop measuring X/Y values
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Example:
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touchctrl: vf50_touchctrl {
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compatible = "toradex,vf50-touchscreen";
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io-channels = <&adc1 0>,<&adc0 0>,
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<&adc0 1>,<&adc1 2>;
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xp-gpios = <&gpio0 13 GPIO_ACTIVE_LOW>;
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xm-gpios = <&gpio2 29 GPIO_ACTIVE_HIGH>;
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yp-gpios = <&gpio0 12 GPIO_ACTIVE_LOW>;
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ym-gpios = <&gpio0 4 GPIO_ACTIVE_HIGH>;
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interrupt-parent = <&gpio0>;
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interrupts = <8 IRQ_TYPE_LEVEL_LOW>;
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pinctrl-names = "idle","default";
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pinctrl-0 = <&pinctrl_touchctrl_idle>, <&pinctrl_touchctrl_gpios>;
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pinctrl-1 = <&pinctrl_touchctrl_default>, <&pinctrl_touchctrl_gpios>;
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vf50-ts-min-pressure = <200>;
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};
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