mirror of
https://github.com/Qortal/Brooklyn.git
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90 lines
1.9 KiB
Plaintext
90 lines
1.9 KiB
Plaintext
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/*
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* Generic Device Tree overlay for the ADS7846 touch controller
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*
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*/
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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 = <&spi0>;
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__overlay__ {
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status = "okay";
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};
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};
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fragment@1 {
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target = <&spidev0>;
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__overlay__ {
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status = "disabled";
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};
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};
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fragment@2 {
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target = <&spidev1>;
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__overlay__ {
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status = "disabled";
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};
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};
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fragment@3 {
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target = <&gpio>;
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__overlay__ {
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ads7846_pins: ads7846_pins {
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brcm,pins = <255>; /* illegal default value */
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brcm,function = <0>; /* in */
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brcm,pull = <0>; /* none */
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};
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};
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};
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fragment@4 {
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target = <&spi0>;
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__overlay__ {
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/* needed to avoid dtc warning */
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#address-cells = <1>;
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#size-cells = <0>;
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ads7846: ads7846@1 {
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compatible = "ti,ads7846";
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reg = <1>;
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pinctrl-names = "default";
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pinctrl-0 = <&ads7846_pins>;
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spi-max-frequency = <2000000>;
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interrupts = <255 2>; /* high-to-low edge triggered */
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interrupt-parent = <&gpio>;
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pendown-gpio = <&gpio 255 0>;
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/* driver defaults */
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ti,x-min = /bits/ 16 <0>;
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ti,y-min = /bits/ 16 <0>;
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ti,x-max = /bits/ 16 <0x0FFF>;
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ti,y-max = /bits/ 16 <0x0FFF>;
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ti,pressure-min = /bits/ 16 <0>;
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ti,pressure-max = /bits/ 16 <0xFFFF>;
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ti,x-plate-ohms = /bits/ 16 <400>;
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};
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};
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};
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__overrides__ {
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cs = <&ads7846>,"reg:0";
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speed = <&ads7846>,"spi-max-frequency:0";
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penirq = <&ads7846_pins>,"brcm,pins:0", /* REQUIRED */
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<&ads7846>,"interrupts:0",
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<&ads7846>,"pendown-gpio:4";
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penirq_pull = <&ads7846_pins>,"brcm,pull:0";
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swapxy = <&ads7846>,"ti,swap-xy?";
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xmin = <&ads7846>,"ti,x-min;0";
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ymin = <&ads7846>,"ti,y-min;0";
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xmax = <&ads7846>,"ti,x-max;0";
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ymax = <&ads7846>,"ti,y-max;0";
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pmin = <&ads7846>,"ti,pressure-min;0";
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pmax = <&ads7846>,"ti,pressure-max;0";
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xohms = <&ads7846>,"ti,x-plate-ohms;0";
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};
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};
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