refactor(system): flatten

inputs/system/modules/base/host/hardware/features/battery.nix

@@ -0,0 +1,94 @@
+
+{ lib, config, pkgs, ... }:
+
+let
+  features = config.systemModules.host.hardware.features;
+  cfg = config.systemModules.host.hardware.battery;
+  inherit (lib) mkIf mkDefault mkOption types;
+  inherit (builtins) elem;
+  MHz = x: x * 1000;
+in
+  
+{
+  options.systemModules.host.hardware.battery = {
+    powersave = {
+      minFreq = mkOption {
+        type = types.int;
+        default = 800;
+        description = "Minimum frequency for powersave mode in MHz";
+      };
+      maxFreq = mkOption {
+        type = types.int;
+        default = 1100;
+        description = "Maximum frequency for powersave mode in MHz";
+      };
+    };
+    performance = {
+      minFreq = mkOption {
+        type = types.int;
+        default = 1500;
+        description = "Minimum frequency for performance mode in MHz";
+      };
+      maxFreq = mkOption {
+        type = types.int;
+        default = 2600;
+        description = "Maximum frequency for performance mode in MHz";
+      };
+    };
+  };
+
+  config = mkIf (elem "battery" features) {
+    boot = {
+      kernelModules = ["acpi_call"];
+      extraModulePackages = with config.boot.kernelPackages; [
+        acpi_call
+        cpupower
+      ];
+    };
+
+    services = {
+      auto-cpufreq = {
+        enable = true;
+        settings = {
+          battery = {
+            governor = "powersave";
+            scaling_min_freq = mkDefault (MHz cfg.powersave.minFreq);
+            scaling_max_freq = mkDefault (MHz cfg.powersave.maxFreq);
+            turbo = "never";
+          };
+          charger = {
+            governor = "performance";
+            scaling_min_freq = mkDefault (MHz cfg.performance.minFreq);
+            scaling_max_freq = mkDefault (MHz cfg.performance.maxFreq);
+            turbo = "auto";
+          };
+        };
+      };
+
+      upower = {
+        enable = true;
+        percentageLow = 25;
+        percentageCritical = 5;
+        percentageAction = 3;
+        criticalPowerAction = "Hibernate";
+      };
+
+      undervolt = {
+        enable = true;
+        tempBat = 65;
+      };
+
+      thermald.enable = true;
+
+      power-profiles-daemon.enable = true;
+
+      logind = {
+        lidSwitch = "suspend";
+      };
+    };
+    environment.systemPackages = with pkgs; [
+      acpi
+      powertop
+    ];
+  };
+}