From cbbc29c7f3bed91bf744d0d16a1a7da226f66ebd Mon Sep 17 00:00:00 2001
From: koral <mail@cmoreau.info>
Date: Sat, 7 Mar 2026 10:01:56 +0100
Subject: [PATCH] feat(raspberry-pi): Temperature thresholds for fan speed of
 PoE HAT can now be configured

---
 raspberry-pi/4/poe-hat.nix      | 65 +++++++++++++++++++++++++++++----
 raspberry-pi/4/poe-plus-hat.nix | 65 +++++++++++++++++++++++++++++----
 2 files changed, 114 insertions(+), 16 deletions(-)

diff --git a/raspberry-pi/4/poe-hat.nix b/raspberry-pi/4/poe-hat.nix
index 3ec29db3..0322994b 100644
--- a/raspberry-pi/4/poe-hat.nix
+++ b/raspberry-pi/4/poe-hat.nix
@@ -7,6 +7,55 @@ in
   options.hardware = {
     raspberry-pi."4".poe-hat = {
       enable = lib.mkEnableOption "support for the Raspberry Pi POE Hat";
+      fan = lib.mkOption {
+        type = lib.types.submodule {
+          options = {
+            temperature0 = lib.mkOption {
+              type = lib.types.int;
+              default = 40000;
+              description = "Temperature threshold 0.";
+            };
+            hysteresis0 = lib.mkOption {
+              type = lib.types.int;
+              default = 2000;
+              description = "Temperature hysteresis 0.";
+            };
+            temperature1 = lib.mkOption {
+              type = lib.types.int;
+              default = 45000;
+              description = "Temperature threshold 1.";
+            };
+            hysteresis1 = lib.mkOption {
+              type = lib.types.int;
+              default = 2000;
+              description = "Temperature hysteresis 1.";
+            };
+            temperature2 = lib.mkOption {
+              type = lib.types.int;
+              default = 50000;
+              description = "Temperature threshold 2.";
+            };
+            hysteresis2 = lib.mkOption {
+              type = lib.types.int;
+              default = 2000;
+              description = "Temperature hysteresis 2.";
+            };
+            temperature3 = lib.mkOption {
+              type = lib.types.int;
+              default = 55000;
+              description = "Temperature threshold 3.";
+            };
+            hysteresis3 = lib.mkOption {
+              type = lib.types.int;
+              default = 5000;
+              description = "Temperature hysteresis 3.";
+            };
+          };
+        };
+
+        default = { };
+        description = "Fan configuration.";
+      };
     };
   };
 
@@ -53,23 +102,23 @@ in
                 target = <&thermal_trips>;
                 __overlay__ {
                   trip0: trip0 {
-                    temperature = <40000>;
-                    hysteresis = <2000>;
+                    temperature = <${cfg.fan.temperature0}>;
+                    hysteresis = <${cfg.fan.hysteresis0}>;
                     type = "active";
                   };
                   trip1: trip1 {
-                    temperature = <45000>;
-                    hysteresis = <2000>;
+                    temperature = <${cfg.fan.temperature1}>;
+                    hysteresis = <${cfg.fan.hysteresis1}>;
                     type = "active";
                   };
                   trip2: trip2 {
-                    temperature = <50000>;
-                    hysteresis = <2000>;
+                    temperature = <${cfg.fan.temperature2}>;
+                    hysteresis = <${cfg.fan.hysteresis2}>;
                     type = "active";
                   };
                   trip3: trip3 {
-                    temperature = <55000>;
-                    hysteresis = <5000>;
+                    temperature = <${cfg.fan.temperature3}>;
+                    hysteresis = <${cfg.fan.hysteresis3}>;
                     type = "active";
                   };
                 };
diff --git a/raspberry-pi/4/poe-plus-hat.nix b/raspberry-pi/4/poe-plus-hat.nix
index b6d1fa3f..805b0557 100644
--- a/raspberry-pi/4/poe-plus-hat.nix
+++ b/raspberry-pi/4/poe-plus-hat.nix
@@ -7,6 +7,55 @@ in
   options.hardware = {
     raspberry-pi."4".poe-plus-hat = {
       enable = lib.mkEnableOption "support for the Raspberry Pi PoE+ HAT";
+      fan = lib.mkOption {
+        type = lib.types.submodule {
+          options = {
+            temperature0 = lib.mkOption {
+              type = lib.types.int;
+              default = 40000;
+              description = "Temperature threshold 0.";
+            };
+            hysteresis0 = lib.mkOption {
+              type = lib.types.int;
+              default = 2000;
+              description = "Temperature hysteresis 0.";
+            };
+            temperature1 = lib.mkOption {
+              type = lib.types.int;
+              default = 45000;
+              description = "Temperature threshold 1.";
+            };
+            hysteresis1 = lib.mkOption {
+              type = lib.types.int;
+              default = 2000;
+              description = "Temperature hysteresis 1.";
+            };
+            temperature2 = lib.mkOption {
+              type = lib.types.int;
+              default = 50000;
+              description = "Temperature threshold 2.";
+            };
+            hysteresis2 = lib.mkOption {
+              type = lib.types.int;
+              default = 2000;
+              description = "Temperature hysteresis 2.";
+            };
+            temperature3 = lib.mkOption {
+              type = lib.types.int;
+              default = 55000;
+              description = "Temperature threshold 3.";
+            };
+            hysteresis3 = lib.mkOption {
+              type = lib.types.int;
+              default = 5000;
+              description = "Temperature hysteresis 3.";
+            };
+          };
+        };
+
+        default = { };
+        description = "Fan configuration.";
+      };
     };
   };
 
@@ -55,23 +104,23 @@ in
                 target = <&thermal_trips>;
                 __overlay__ {
                   trip0: trip0 {
-                    temperature = <40000>;
-                    hysteresis = <2000>;
+                    temperature = <${cfg.fan.temperature0}>;
+                    hysteresis = <${cfg.fan.hysteresis0}>;
                     type = "active";
                   };
                   trip1: trip1 {
-                    temperature = <45000>;
-                    hysteresis = <2000>;
+                    temperature = <${cfg.fan.temperature1}>;
+                    hysteresis = <${cfg.fan.hysteresis1}>;
                     type = "active";
                   };
                   trip2: trip2 {
-                    temperature = <50000>;
-                    hysteresis = <2000>;
+                    temperature = <${cfg.fan.temperature2}>;
+                    hysteresis = <${cfg.fan.hysteresis2}>;
                     type = "active";
                   };
                   trip3: trip3 {
-                    temperature = <55000>;
-                    hysteresis = <5000>;
+                    temperature = <${cfg.fan.temperature3}>;
+                    hysteresis = <${cfg.fan.hysteresis3}>;
                     type = "active";
                   };
                 };