diff options
Diffstat (limited to 'board/gdsys/common/fanctrl.c')
-rw-r--r-- | board/gdsys/common/fanctrl.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/board/gdsys/common/fanctrl.c b/board/gdsys/common/fanctrl.c new file mode 100644 index 0000000..44569bb --- /dev/null +++ b/board/gdsys/common/fanctrl.c @@ -0,0 +1,32 @@ +/* + * (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); +} |