| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * (C) Copyright 2015 |
| * Dirk Eibach, Guntermann & Drunck GmbH, dirk.eibach@gdsys.cc |
| */ |
| |
| #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); |
| } |