hrcon: Add fan controllers
Signed-off-by: Dirk Eibach <dirk.eibach@gdsys.cc>
diff --git a/board/gdsys/common/fanctrl.c b/board/gdsys/common/fanctrl.c
new file mode 100644
index 0000000..44569bb
--- /dev/null
+++ b/board/gdsys/common/fanctrl.c
@@ -0,0 +1,32 @@
+/*
+ * (C) Copyright 2015
+ * Dirk Eibach, Guntermann & Drunck GmbH, eibach@gdsys.de
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <i2c.h>
+
+enum {
+ FAN_CONFIG = 0x03,
+ FAN_TACHLIM_LSB = 0x48,
+ FAN_TACHLIM_MSB = 0x49,
+ FAN_PWM_FREQ = 0x4D,
+};
+
+void init_fan_controller(u8 addr)
+{
+ int val;
+
+ /* set PWM Frequency to 2.5% resolution */
+ i2c_reg_write(addr, FAN_PWM_FREQ, 20);
+
+ /* set Tachometer Limit */
+ i2c_reg_write(addr, FAN_TACHLIM_LSB, 0x10);
+ i2c_reg_write(addr, FAN_TACHLIM_MSB, 0x0a);
+
+ /* enable Tach input */
+ val = i2c_reg_read(addr, FAN_CONFIG) | 0x04;
+ i2c_reg_write(addr, FAN_CONFIG, val);
+}