From eaf90df56ca9899a2b989e19c5d008d15447dd4f Mon Sep 17 00:00:00 2001
From: Daniel Barlow <dan@telent.net>
Date: Mon, 6 Feb 2023 23:19:35 +0000
Subject: [PATCH] per-device dts

---
 default.nix                  | 4 ++--
 devices/gl-ar750/default.nix | 1 +
 modules/base.nix             | 1 +
 3 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/default.nix b/default.nix
index 92d51f0..28ea478 100644
--- a/default.nix
+++ b/default.nix
@@ -37,7 +37,7 @@ let
       inherit (config.kernel) config;
     };
     dtb =  (callPackage ./kernel/dtb.nix {}) {
-      dts = "${openwrt}/target/linux/ath79/dts/qca9531_glinet_gl-ar750.dts";
+      dts = config.kernel.dts { inherit openwrt; };
       includes = [
         "${openwrt}/target/linux/ath79/dts"
         "${kernel.headers}/include"
@@ -95,5 +95,5 @@ in {
 
   # this is just here as a convenience, so that we can get a
   # cross-compiling nix-shell for any package we're customizing
-  inherit  pkgs;
+  inherit pkgs;
 }
diff --git a/devices/gl-ar750/default.nix b/devices/gl-ar750/default.nix
index b0d391e..e82d7a7 100644
--- a/devices/gl-ar750/default.nix
+++ b/devices/gl-ar750/default.nix
@@ -62,6 +62,7 @@
       };
     };
   kernel = rec {
+    dts = { openwrt,... }:"${openwrt}/target/linux/ath79/dts/qca9531_glinet_gl-ar750.dts";
     config = {
       MIPS_ELF_APPENDED_DTB = "y";
       OF = "y";
diff --git a/modules/base.nix b/modules/base.nix
index e45dddf..efad7b6 100644
--- a/modules/base.nix
+++ b/modules/base.nix
@@ -24,6 +24,7 @@ in {
     };
     filesystem = mkOption { type = types.anything; };
     kernel = {
+      dts = mkOption { type = types.functionTo types.string; };
       config = mkOption {
         # mostly the values are y n or m, but sometimes
         # other strings are also used