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