mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-19 03:08:31 +00:00
33 lines
633 B
C
33 lines
633 B
C
|
/*
|
||
|
|
* (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);
|
||
|
|
}
|