From 7ff489741457ed9b16ba6634951c5040dda8a455 Mon Sep 17 00:00:00 2001
From: Adrian Pistol <vifino@posteo.net>
Date: Mon, 25 Mar 2024 13:18:44 +0100
Subject: [PATCH] linux/common-config: Enable PWM support

Necessary to support the backlight on the GPD Pocket, GPD Win and several other devices.
---
 pkgs/os-specific/linux/kernel/common-config.nix | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkgs/os-specific/linux/kernel/common-config.nix b/pkgs/os-specific/linux/kernel/common-config.nix
index 7e47a07f9604..9bc74b4eb848 100644
--- a/pkgs/os-specific/linux/kernel/common-config.nix
+++ b/pkgs/os-specific/linux/kernel/common-config.nix
@@ -126,6 +126,9 @@ let
       # GPIO power management
       POWER_RESET_GPIO                 = option yes;
       POWER_RESET_GPIO_RESTART         = option yes;
+
+      # Enable Pulse-Width-Modulation support, commonly used for fan and backlight.
+      PWM                              = yes;
     } // optionalAttrs (stdenv.hostPlatform.isx86) {
       INTEL_IDLE                       = yes;
       INTEL_RAPL                       = whenAtLeast "5.3" module;