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47 lines
1008 B
Plaintext
47 lines
1008 B
Plaintext
// Device tree overlay for I2C connected Goodix gt9271 multiple touch controller
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/dts-v1/;
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/plugin/;
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/ {
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compatible = "brcm,bcm2835";
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fragment@0 {
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target = <&gpio>;
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__overlay__ {
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goodix_pins: goodix_pins {
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brcm,pins = <4 17>; // interrupt and reset
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brcm,function = <0 0>; // in
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brcm,pull = <2 2>; // pull-up
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};
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};
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};
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fragment@1 {
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target = <&i2c1>;
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__overlay__ {
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#address-cells = <1>;
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#size-cells = <0>;
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status = "okay";
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gt9271: gt9271@14 {
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compatible = "goodix,gt9271";
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reg = <0x14>;
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pinctrl-names = "default";
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pinctrl-0 = <&goodix_pins>;
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interrupt-parent = <&gpio>;
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interrupts = <4 2>; // high-to-low edge triggered
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irq-gpios = <&gpio 4 0>; // Pin7 on GPIO header
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reset-gpios = <&gpio 17 0>; // Pin11 on GPIO header
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};
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};
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};
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__overrides__ {
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interrupt = <&goodix_pins>,"brcm,pins:0",
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<>9271>,"interrupts:0",
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<>9271>,"irq-gpios:4";
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reset = <&goodix_pins>,"brcm,pins:4",
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<>9271>,"reset-gpios:4";
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};
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};
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