From 256c857ac07d7a4a8800be712f36323b400806bf Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Wed, 27 Apr 2022 13:55:00 +0200
Subject: [PATCH] modules: hardware: add firmware

---
 modules/hardware/default.nix          |  1 +
 modules/hardware/firmware/default.nix | 38 +++++++++++++++++++++++++++
 2 files changed, 39 insertions(+)
 create mode 100644 modules/hardware/firmware/default.nix

diff --git a/modules/hardware/default.nix b/modules/hardware/default.nix
index 9ab5d40..2a686f7 100644
--- a/modules/hardware/default.nix
+++ b/modules/hardware/default.nix
@@ -5,6 +5,7 @@
   imports = [
     ./bluetooth
     ./ergodox
+    ./firmware
     ./mx-ergo
     ./networking
     ./sound
diff --git a/modules/hardware/firmware/default.nix b/modules/hardware/firmware/default.nix
new file mode 100644
index 0000000..e899232
--- /dev/null
+++ b/modules/hardware/firmware/default.nix
@@ -0,0 +1,38 @@
+{ config, lib, pkgs, ... }:
+let
+  cfg = config.my.hardware.firmware;
+in
+{
+  options.my.hardware.firmware = with lib; {
+    enable = my.mkDisableOption "firmware configuration";
+
+    cpuFlavor = mkOption {
+      type = with types; nullOr (enum [ "intel" "amd" ]);
+      default = null;
+      example = "intel";
+      description = "Which kind of CPU to activate micro-code updates";
+    };
+  };
+
+  config = lib.mkIf cfg.enable (lib.mkMerge [
+    {
+      hardware = {
+        enableRedistributableFirmware = true;
+      };
+    }
+
+    # Intel CPU
+    (lib.mkIf (cfg.cpuFlavor == "intel") {
+      hardware = {
+        cpu.intel.updateMicrocode = true;
+      };
+    })
+
+    # AMD CPU
+    (lib.mkIf (cfg.cpuFlavor == "amd") {
+      hardware = {
+        cpu.amd.updateMicrocode = true;
+      };
+    })
+  ]);
+}