From 2de5be8d4efd14e02b123fe9baa6a78f0c7548f1 Mon Sep 17 00:00:00 2001
From: Jason Ryan <jasonwryan@gmail.com>
Date: Sun, 26 Feb 2017 12:14:25 +1300
Subject: [PATCH] ODROID-U2 update (#6)

Migration from Arch Wiki
---
 ODROID-U2.md | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/ODROID-U2.md b/ODROID-U2.md
index 42712c7..7acb026 100644
--- a/ODROID-U2.md
+++ b/ODROID-U2.md
@@ -11,4 +11,22 @@ ctl.!default {
    type hw
    card 0
 }
-```
\ No newline at end of file
+```
+
+## CPU Fan
+The optional CPU fan can be controlled via the `/sys/devices/platform/odroidu2-fan` 
+interface.
+
+```
+# echo auto > /sys/devices/platform/odroidu2-fan/fan_mode
+# echo manual > /sys/devices/platform/odroidu2-fan/fan_mode
+```
+
+### Fan Speed (Manual Only)
+Values range from 0 (0%) to 255 (100%)
+
+```
+# echo 0 > /sys/devices/platform/odroidu2-fan/pwm_duty
+# echo 255 > /sys/devices/platform/odroidu2-fan/pwm_duty
+```
+