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Incomplete: Enable HW PWM timers for the HDD fan

This commit is contained in:
coolneng 2022-05-16 23:30:06 +02:00
parent ec3588bcf8
commit 62a33ef405
Signed by: coolneng
GPG Key ID: 9893DA236405AF57
1 changed files with 24 additions and 10 deletions
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34
scripts/SATA-hat.sh
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@ -2,14 +2,12 @@
BASE_PATH=/sys/class
GPIO_PATH="$BASE_PATH"/gpio
PWM_PATH="$BASE_PATH"/pwm
PWM_PATH="$BASE_PATH"/pwm/pwmchip0
# GPIO pins
SATA0=26
SATA1=25
# PWM pins
CPU_FAN=12
HDD_FAN=13
# Values
LOW=0
@ -27,7 +25,7 @@ unexport_pin() {
fi
}
set_mode() {
set_gpio() {
export_pin "$1"
echo "out" >$GPIO_PATH/gpio"$1"/direction
echo "$2" >$GPIO_PATH/gpio"$1"/value
@ -36,17 +34,33 @@ set_mode() {
fi
}
enable_pwm_channel() {
echo "$1" >$PWM_PATH/export
echo 40000 >$PWM_PATH/pwm"$1"/period
echo 30000 >$PWM_PATH/pwm"$1"/duty_cycle
echo 1 >$PWM_PATH/pwm"$1"/enable
}
set_pwm() {
enable_pwm_channel 1
if [ "$1" = "clean" ]; then
echo 0 >$PWM_PATH/unexport
fi
}
turn_on() {
set_mode $SATA0 $HIGH
set_gpio $SATA0 $HIGH
sleep 1
set_mode $SATA1 $HIGH
set_mode $CPU_FAN $HIGH
set_gpio $SATA1 $HIGH
set_gpio $CPU_FAN $HIGH
set_pwm
}
turn_off() {
set_mode $SATA0 $LOW clean
set_mode $SATA1 $LOW clean
set_mode $CPU_FAN $LOW clean
set_gpio $SATA0 $LOW clean
set_gpio $SATA1 $LOW clean
set_gpio $CPU_FAN $LOW clean
set_pwm clean
}
trap turn_off INT