51 lines
1.1 KiB
Nix
51 lines
1.1 KiB
Nix
{ config, lib, ... }:
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let
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cfg = config.hardware.raspberry-pi."4".pwm0;
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in
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{
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options.hardware = {
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raspberry-pi."4".pwm0 = {
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enable = lib.mkEnableOption ''
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Enable support for the hardware pwm0 channel on GPIO_18
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'';
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};
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};
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config = lib.mkIf cfg.enable {
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hardware.deviceTree = {
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overlays = [{
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name = "pwm-overlay";
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dtsText = ''
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/dts-v1/;
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/plugin/;
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/ {
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compatible = "brcm,bcm2711";
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fragment@0 {
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target = <&gpio>;
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__overlay__ {
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pwm_pins: pwm_pins {
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brcm,pins = <18>;
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brcm,function = <2>; /* Alt5 */
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};
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};
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};
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fragment@1 {
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target = <&pwm>;
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__overlay__ {
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pinctrl-names = "default";
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assigned-clock-rates = <100000000>;
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status = "okay";
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pinctrl-0 = <&pwm_pins>;
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};
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};
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};
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'';
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}];
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};
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};
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}
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