1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * (C) Copyright 2015
3*4882a593Smuzhiyun * Dirk Eibach, Guntermann & Drunck GmbH, eibach@gdsys.de
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <common.h>
9*4882a593Smuzhiyun #include <i2c.h>
10*4882a593Smuzhiyun
11*4882a593Smuzhiyun enum {
12*4882a593Smuzhiyun FAN_CONFIG = 0x03,
13*4882a593Smuzhiyun FAN_TACHLIM_LSB = 0x48,
14*4882a593Smuzhiyun FAN_TACHLIM_MSB = 0x49,
15*4882a593Smuzhiyun FAN_PWM_FREQ = 0x4D,
16*4882a593Smuzhiyun };
17*4882a593Smuzhiyun
init_fan_controller(u8 addr)18*4882a593Smuzhiyun void init_fan_controller(u8 addr)
19*4882a593Smuzhiyun {
20*4882a593Smuzhiyun int val;
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun /* set PWM Frequency to 2.5% resolution */
23*4882a593Smuzhiyun i2c_reg_write(addr, FAN_PWM_FREQ, 20);
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun /* set Tachometer Limit */
26*4882a593Smuzhiyun i2c_reg_write(addr, FAN_TACHLIM_LSB, 0x10);
27*4882a593Smuzhiyun i2c_reg_write(addr, FAN_TACHLIM_MSB, 0x0a);
28*4882a593Smuzhiyun
29*4882a593Smuzhiyun /* enable Tach input */
30*4882a593Smuzhiyun val = i2c_reg_read(addr, FAN_CONFIG) | 0x04;
31*4882a593Smuzhiyun i2c_reg_write(addr, FAN_CONFIG, val);
32*4882a593Smuzhiyun }
33