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- /*
- * (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);
- }
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