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-rw-r--r--target/linux/bcm27xx/patches-5.10/950-0510-Make-rpi-poe-fan-less-noisy-in-cool-environments.patch24
1 files changed, 24 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.10/950-0510-Make-rpi-poe-fan-less-noisy-in-cool-environments.patch b/target/linux/bcm27xx/patches-5.10/950-0510-Make-rpi-poe-fan-less-noisy-in-cool-environments.patch
new file mode 100644
index 0000000000..6dea05e207
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.10/950-0510-Make-rpi-poe-fan-less-noisy-in-cool-environments.patch
@@ -0,0 +1,24 @@
+From 6e4cd276213a20bc55146588b0ec2fc6b622a9d7 Mon Sep 17 00:00:00 2001
+From: ProBackup-nl <515451+ProBackup-nl@users.noreply.github.com>
+Date: Thu, 18 Mar 2021 18:21:43 +0100
+Subject: [PATCH] Make rpi poe fan less noisy in cool environments
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Run the PoE hat fan with reduced noise when possible. The PoE hat fan will spin even at PWM=1 and spins almost silent. Tested at 17ÂșC, the fan PWM alternates between 1 and 10, which is a lot less noisy then alternating between PWM levels 0 and 31.
+---
+ arch/arm/boot/dts/overlays/rpi-poe-overlay.dts | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/arch/arm/boot/dts/overlays/rpi-poe-overlay.dts
++++ b/arch/arm/boot/dts/overlays/rpi-poe-overlay.dts
+@@ -16,7 +16,7 @@
+ cooling-min-state = <0>;
+ cooling-max-state = <4>;
+ #cooling-cells = <2>;
+- cooling-levels = <0 31 63 150 255>;
++ cooling-levels = <0 1 10 100 255>;
+ status = "okay";
+ };
+ };