1 /*
2 * (C) Copyright 2015
3 * Dirk Eibach, Guntermann & Drunck GmbH, eibach@gdsys.de
4 *
5 * SPDX-License-Identifier: GPL-2.0+
6 */
7
8 #include <common.h>
9 #include <i2c.h>
10
11 enum {
12 FAN_CONFIG = 0x03,
13 FAN_TACHLIM_LSB = 0x48,
14 FAN_TACHLIM_MSB = 0x49,
15 FAN_PWM_FREQ = 0x4D,
16 };
17
init_fan_controller(u8 addr)18 void init_fan_controller(u8 addr)
19 {
20 int val;
21
22 /* set PWM Frequency to 2.5% resolution */
23 i2c_reg_write(addr, FAN_PWM_FREQ, 20);
24
25 /* set Tachometer Limit */
26 i2c_reg_write(addr, FAN_TACHLIM_LSB, 0x10);
27 i2c_reg_write(addr, FAN_TACHLIM_MSB, 0x0a);
28
29 /* enable Tach input */
30 val = i2c_reg_read(addr, FAN_CONFIG) | 0x04;
31 i2c_reg_write(addr, FAN_CONFIG, val);
32 }
33