From 772d5b9d3050b6302ffc094a7759d45ae74d17ac Mon Sep 17 00:00:00 2001
From: Stuart Longland <me@vk4msl.id.au>
Date: Sun, 4 Sep 2016 06:47:28 +1000
Subject: [PATCH] FAN control: Fine-tune minimum PWM

It appears the minimum PWM is more strongly dependent on battery voltage
than I had planned, it needs to be just a little higher to ensure the
fan keeps turning at low RPM.
---
 powerctl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/powerctl.c b/powerctl.c
index 6534f6e..9165a17 100644
--- a/powerctl.c
+++ b/powerctl.c
@@ -95,7 +95,7 @@ static volatile uint8_t led_timeout = 0;
  */
 #define TEMP_MIN	(270 << 6)	/*!< ~20°C, approx ADC reading */
 #define TEMP_MAX	(300 << 6)	/*!< ~30°C, approx ADC reading */
-#define FAN_PWM_MIN	(80)		/*!< Minimum PWM value */
+#define FAN_PWM_MIN	(88)		/*!< Minimum PWM value */
 #define FAN_PWM_MAX	(255)		/*!< Maximum PWM value */
 /*! Fan kick-start timeout */
 static volatile uint8_t fan_timeout = 0;