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70 lines
1.1 KiB
Plaintext
70 lines
1.1 KiB
Plaintext
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// Definitions for MCP23017 Gpio Extender from Microchip Semiconductor
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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 = <&i2c1>;
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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 = <&gpio>;
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__overlay__ {
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mcp23017_pins: mcp23017_pins@20 {
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brcm,pins = <4>;
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brcm,function = <0>;
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};
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};
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};
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fragment@2 {
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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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mcp23017: mcp@20 {
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compatible = "microchip,mcp23017";
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reg = <0x20>;
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gpio-controller;
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#gpio-cells = <2>;
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status = "okay";
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};
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};
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};
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fragment@3 {
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target = <&mcp23017>;
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__dormant__ {
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compatible = "microchip,mcp23008";
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};
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};
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fragment@4 {
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target = <&mcp23017>;
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mcp23017_irq: __overlay__ {
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#interrupt-cells=<2>;
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interrupt-parent = <&gpio>;
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interrupts = <4 2>;
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interrupt-controller;
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microchip,irq-mirror;
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};
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};
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__overrides__ {
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gpiopin = <&mcp23017_pins>,"brcm,pins:0",
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<&mcp23017_irq>,"interrupts:0";
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addr = <&mcp23017>,"reg:0", <&mcp23017_pins>,"reg:0";
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mcp23008 = <0>,"=3";
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noints = <0>,"!1!4";
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};
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};
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