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https://github.com/AsahiLinux/u-boot
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32 lines
633 B
C
32 lines
633 B
C
/*
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* (C) Copyright 2015
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* Dirk Eibach, Guntermann & Drunck GmbH, eibach@gdsys.de
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <i2c.h>
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enum {
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FAN_CONFIG = 0x03,
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FAN_TACHLIM_LSB = 0x48,
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FAN_TACHLIM_MSB = 0x49,
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FAN_PWM_FREQ = 0x4D,
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};
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void init_fan_controller(u8 addr)
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{
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int val;
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/* set PWM Frequency to 2.5% resolution */
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i2c_reg_write(addr, FAN_PWM_FREQ, 20);
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/* set Tachometer Limit */
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i2c_reg_write(addr, FAN_TACHLIM_LSB, 0x10);
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i2c_reg_write(addr, FAN_TACHLIM_MSB, 0x0a);
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/* enable Tach input */
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val = i2c_reg_read(addr, FAN_CONFIG) | 0x04;
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i2c_reg_write(addr, FAN_CONFIG, val);
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}
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