1 files changed, 24 insertions, 1 deletions
diff --git a/pkgs/os-specific/linux/device-tree/default.nix b/pkgs/os-specific/linux/device-tree/default.nix
index fb8e92f2330..1a50d799b4b 100644
--- a/pkgs/os-specific/linux/device-tree/default.nix
+++ b/pkgs/os-specific/linux/device-tree/default.nix
@@ -1,6 +1,29 @@
-{ lib, stdenvNoCC, dtc }:
+{ lib, stdenv, stdenvNoCC, dtc }:
 
 with lib; {
+  # Compile single Device Tree overlay source
+  # file (.dts) into its compiled variant (.dtb)
+  compileDTS = ({
+    name,
+    dtsFile,
+    includePaths ? [],
+    extraPreprocessorFlags ? []
+  }: stdenv.mkDerivation {
+    inherit name;
+
+    nativeBuildInputs = [ dtc ];
+
+    buildCommand =
+      let
+        includeFlagsStr = lib.concatMapStringsSep " " (includePath: "-I${includePath}") includePaths;
+        extraPreprocessorFlagsStr = lib.concatStringsSep " " extraPreprocessorFlags;
+      in
+      ''
+        $CC -E -nostdinc ${includeFlagsStr} -undef -D__DTS__ -x assembler-with-cpp ${extraPreprocessorFlagsStr} ${dtsFile} | \
+        dtc -I dts -O dtb -@ -o $out
+      '';
+  });
+
   applyOverlays = (base: overlays': stdenvNoCC.mkDerivation {
     name = "device-tree-overlays";
     nativeBuildInputs = [ dtc ];