forked from M-Labs/it-infra
68 lines
2.0 KiB
Nix
68 lines
2.0 KiB
Nix
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{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.hardware.deviceTree;
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in {
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options = {
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hardware.deviceTree = {
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enable = mkOption {
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default = pkgs.stdenv.hostPlatform.platform.kernelDTB or false;
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type = types.bool;
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description = ''
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Build device tree files. These are used to describe the
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non-discoverable hardware of a system.
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'';
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};
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base = mkOption {
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default = "${config.boot.kernelPackages.kernel}/dtbs";
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defaultText = "\${config.boot.kernelPackages.kernel}/dtbs";
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example = literalExample "pkgs.device-tree_rpi";
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type = types.path;
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description = ''
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The path containing the base device-tree (.dtb) to boot. Contains
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device trees bundled with the Linux kernel by default.
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'';
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};
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name = mkOption {
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default = null;
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example = "some-dtb.dtb";
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type = types.nullOr types.str;
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description = ''
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The name of an explicit dtb to be loaded, relative to the dtb base.
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Useful in extlinux scenarios if the bootloader doesn't pick the
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right .dtb file from FDTDIR.
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'';
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};
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overlays = mkOption {
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default = [];
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example = literalExample
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"[\"\${pkgs.device-tree_rpi.overlays}/w1-gpio.dtbo\"]";
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type = types.listOf types.path;
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description = ''
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A path containing device tree overlays (.dtbo) to be applied to all
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base device-trees.
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'';
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};
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package = mkOption {
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default = null;
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type = types.nullOr types.path;
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internal = true;
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description = ''
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A path containing the result of applying `overlays` to `base`.
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'';
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};
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};
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};
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config = mkIf (cfg.enable) {
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hardware.deviceTree.package = if (cfg.overlays != [])
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then pkgs.deviceTree.applyOverlays cfg.base cfg.overlays else cfg.base;
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};
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}
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