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Implement fan controller for Nanopi M4 (#3231)
* Implement fan controller for Nanopi M2V2 * Fan works on all Nanopi M4
This commit is contained in:
Igor Pečovnik
@@ -247,6 +247,12 @@ family_tweaks()
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fi
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if [[ $BOARD == nanopim4* ]]; then
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# enable fan support
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chroot $SDCARD /bin/bash -c "systemctl --no-reload enable nanopim4-pwm-fan.service >/dev/null 2>&1"
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fi
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if [[ $BOARD == pinebook-pro ]]; then
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@@ -297,6 +303,14 @@ family_tweaks_bsp()
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fi
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fi
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if [[ $BOARD == nanopim4* ]]; then
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# Fan support
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cp $SRC/packages/bsp/nanopim4/nanopim4-pwm-fan.service $destination/lib/systemd/system/
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install -m 755 $SRC/packages/bsp/nanopim4/nanopim4-pwm-fan.sh $destination/usr/bin/nanopim4-pwm-fan.sh
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fi
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if [[ $BOARD == helios64 ]]; then
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mkdir -p $destination/etc/udev/rules.d/
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16
packages/bsp/nanopim4/nanopim4-pwm-fan.service
Normal file
16
packages/bsp/nanopim4/nanopim4-pwm-fan.service
Normal file
@@ -0,0 +1,16 @@
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[Unit]
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Description=Fan control for the NanoPi M4
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[Service]
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Type=simple
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# Edit the directory below if you placed the Exec scripts elsewhere
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ExecStart=/bin/bash /usr/bin/nanopim4-pwm-fan.sh
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ExecStop=/bin/kill -2 $MAINPID
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# Restart options
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Restart=on-failure
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RestartSec=15
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[Install]
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WantedBy=multi-user.target
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488
packages/bsp/nanopim4/nanopim4-pwm-fan.sh
Normal file
488
packages/bsp/nanopim4/nanopim4-pwm-fan.sh
Normal file
@@ -0,0 +1,488 @@
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#!/bin/bash
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###############################################################################
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# Bash script to control the NanoPi M4 SATA hat 12v fan via the sysfs interface
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###############################################################################
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# Author: cgomesu
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# Repo: https://github.com/cgomesu/nanopim4-satahat-fan
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# Official pwm sysfs doc: https://www.kernel.org/doc/Documentation/pwm.txt
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#
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# This is free. There is NO WARRANTY. Use at your own risk.
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###############################################################################
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cache () {
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if [[ -z "$1" ]]; then
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echo '[pwm-fan] Cache file was not specified. Assuming generic.'
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local FILENAME='generic'
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else
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local FILENAME="$1"
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fi
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# cache to memory
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CACHE_ROOT='/tmp/pwm-fan/'
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if [[ ! -d "$CACHE_ROOT" ]]; then
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mkdir "$CACHE_ROOT"
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fi
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CACHE=$CACHE_ROOT$FILENAME'.cache'
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if [[ ! -f "$CACHE" ]]; then
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touch "$CACHE"
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else
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> "$CACHE"
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fi
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}
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check_requisites () {
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local REQUISITES=('bc' 'cat' 'echo' 'mkdir' 'touch' 'trap' 'sleep')
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echo '[pwm-fan] Checking requisites: '${REQUISITES[@]}
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for cmd in ${REQUISITES[@]}; do
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if [[ -z $(command -v $cmd) ]]; then
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echo '[pwm-fan] The following program is not installed or cannot be found in this users $PATH: '$cmd
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echo '[pwm-fan] Fix it and try again.'
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end "Missing important packages. Cannot continue." 1
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fi
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done
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echo '[pwm-fan] All commands are accesible.'
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}
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cleanup () {
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echo '---- cleaning up ----'
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# disable the channel
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unexport_pwmchip_channel
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# clean cache files
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if [[ -d "$CACHE_ROOT" ]]; then
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rm -rf "$CACHE_ROOT"
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fi
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echo '--------------------'
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}
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config () {
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pwmchip
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export_pwmchip_channel
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fan_startup
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fan_initialization
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thermal_monit
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}
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# takes message and status as argument
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end () {
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cleanup
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echo '####################################################'
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echo '# END OF THE PWM-FAN SCRIPT'
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echo '# MESSAGE: '$1
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echo '####################################################'
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exit $2
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}
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export_pwmchip_channel () {
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if [[ ! -d "$CHANNEL_FOLDER" ]]; then
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local EXPORT=$PWMCHIP_FOLDER'export'
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cache 'export'
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local EXPORT_SET=$(echo 0 2> "$CACHE" > "$EXPORT")
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if [[ ! -z $(cat "$CACHE") ]]; then
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# on error, parse output
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if [[ $(cat "$CACHE") =~ (P|p)ermission\ denied ]]; then
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echo '[pwm-fan] This user does not have permission to use channel '$CHANNEL'.'
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if [[ ! -z $(command -v stat) ]]; then
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echo '[pwm-fan] Export is owned by user: '$(stat -c '%U' "$EXPORT")'.'
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echo '[pwm-fan] Export is owned by group: '$(stat -c '%G' "$EXPORT")'.'
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fi
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local ERR_MSG='User permission error while setting channel.'
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elif [[ $(cat "$CACHE") =~ (D|d)evice\ or\ resource\ busy ]]; then
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echo '[pwm-fan] It seems the pin is already in use. Cannot write to export.'
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local ERR_MSG=$PWMCHIP' was busy while setting channel.'
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else
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echo '[pwm-fan] There was an unknown error while setting the channel '$CHANNEL'.'
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if [[ $(cat "$CACHE") =~ \ ([^\:]+)$ ]]; then
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echo '[pwm-fan] Error: '${BASH_REMATCH[1]}'.'
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fi
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local ERR_MSG='Unknown error while setting channel.'
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fi
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end "$ERR_MSG" 1
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fi
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sleep 1
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elif [[ -d "$CHANNEL_FOLDER" ]]; then
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echo '[pwm-fan] '$CHANNEL' channel is already accessible.'
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fi
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}
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fan_initialization () {
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if [[ -z "$TIME_STARTUP" ]]; then
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TIME_STARTUP=10
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fi
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cache 'test_fan'
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local READ_MAX_DUTY_CYCLE=$(cat $CHANNEL_FOLDER'period')
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echo $READ_MAX_DUTY_CYCLE 2> $CACHE > $CHANNEL_FOLDER'duty_cycle'
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# on error, try setting duty_cycle to a lower value
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if [[ ! -z $(cat $CACHE) ]]; then
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local READ_MAX_DUTY_CYCLE=$(($(cat $CHANNEL_FOLDER'period')-100))
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> $CACHE
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echo $READ_MAX_DUTY_CYCLE 2> $CACHE > $CHANNEL_FOLDER'duty_cycle'
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if [[ ! -z $(cat $CACHE) ]]; then
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end 'Unable to set max duty_cycle.' 1
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fi
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fi
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MAX_DUTY_CYCLE=$READ_MAX_DUTY_CYCLE
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echo '[pwm-fan] Running fan at full speed for the next '$TIME_STARTUP' seconds...'
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echo 1 > $CHANNEL_FOLDER'enable'
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sleep $TIME_STARTUP
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echo $((MAX_DUTY_CYCLE/2)) > $CHANNEL_FOLDER'duty_cycle'
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echo '[pwm-fan] Initialization done. Duty cycle at 50% now: '$((MAX_DUTY_CYCLE/2))' ns.'
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sleep 1
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}
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fan_run () {
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if [[ $THERMAL_STATUS -eq 0 ]]; then
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fan_run_max
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else
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fan_run_thermal
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fi
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}
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fan_run_max () {
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echo '[pwm-fan] Running fan at full speed until stopped (Ctrl+C or kill '$$')...'
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while true; do
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echo $MAX_DUTY_CYCLE > $CHANNEL_FOLDER'duty_cycle'
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# run every so often to make sure it is maxed
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sleep 120
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done
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}
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fan_run_thermal () {
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echo '[pwm-fan] Running fan in temp monitor mode until stopped (Ctrl+C or kill '$$')...'
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if [[ -z $THERMAL_ABS_THRESH_LOW ]]; then
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THERMAL_ABS_THRESH_LOW=25
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fi
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if [[ -z $THERMAL_ABS_THRESH_HIGH ]]; then
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THERMAL_ABS_THRESH_HIGH=75
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fi
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THERMAL_ABS_THRESH=($THERMAL_ABS_THRESH_LOW $THERMAL_ABS_THRESH_HIGH)
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if [[ -z $DC_PERCENT_MIN ]]; then
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DC_PERCENT_MIN=25
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fi
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if [[ -z $DC_PERCENT_MAX ]]; then
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DC_PERCENT_MAX=100
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fi
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DC_ABS_THRESH=($(((DC_PERCENT_MIN*MAX_DUTY_CYCLE)/100)) $(((DC_PERCENT_MAX*MAX_DUTY_CYCLE)/100)))
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if [[ -z $TEMPS_SIZE ]]; then
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TEMPS_SIZE=6
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fi
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if [[ -z $TIME_LOOP ]]; then
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TIME_LOOP=10
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fi
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TEMPS=()
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while [[ true ]]; do
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TEMPS+=($(thermal_meter))
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if [[ ${#TEMPS[@]} -gt $TEMPS_SIZE ]]; then
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TEMPS=(${TEMPS[@]:1})
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fi
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if [[ ${TEMPS[-1]} -le ${THERMAL_ABS_THRESH[0]} ]]; then
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echo ${DC_ABS_THRESH[0]} 2> /dev/null > $CHANNEL_FOLDER'duty_cycle'
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elif [[ ${TEMPS[-1]} -ge ${THERMAL_ABS_THRESH[-1]} ]]; then
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echo ${DC_ABS_THRESH[-1]} 2> /dev/null > $CHANNEL_FOLDER'duty_cycle'
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elif [[ ${#TEMPS[@]} -gt 1 ]]; then
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TEMPS_SUM=0
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for TEMP in ${TEMPS[@]}; do
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let TEMPS_SUM+=$TEMP
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done
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# moving mid-point
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MEAN_TEMP=$((TEMPS_SUM/${#TEMPS[@]}))
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DEV_MEAN_CRITICAL=$((MEAN_TEMP-100))
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X0=${DEV_MEAN_CRITICAL#-}
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# args: x, x0, L, a, b (k=a/b)
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MODEL=$(function_logistic ${TEMPS[-1]} $X0 ${DC_ABS_THRESH[-1]} 1 10)
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if [[ $MODEL -lt ${DC_ABS_THRESH[0]} ]]; then
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echo ${DC_ABS_THRESH[0]} 2> /dev/null > $CHANNEL_FOLDER'duty_cycle'
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elif [[ $MODEL -gt ${DC_ABS_THRESH[-1]} ]]; then
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echo ${DC_ABS_THRESH[-1]} 2> /dev/null > $CHANNEL_FOLDER'duty_cycle'
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else
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echo $MODEL 2> /dev/null > $CHANNEL_FOLDER'duty_cycle'
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fi
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fi
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sleep $TIME_LOOP
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done
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}
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fan_startup () {
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if [[ -z $PERIOD ]]; then
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PERIOD=25000000
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fi
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while [[ -d "$CHANNEL_FOLDER" ]]; do
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if [[ $(cat $CHANNEL_FOLDER'enable') -eq 0 ]]; then
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set_default
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break
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elif [[ $(cat $CHANNEL_FOLDER'enable') -eq 1 ]]; then
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echo '[pwm-fan] The fan is already enabled. Will disable it.'
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echo 0 > $CHANNEL_FOLDER'enable'
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sleep 1
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set_default
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break
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else
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echo '[pwm-fan] Unable to read the fan enable status.'
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end 'Bad fan status' 1
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fi
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done
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}
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function_logistic () {
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# https://en.wikipedia.org/wiki/Logistic_function
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local x=$1
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local x0=$2
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local L=$3
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# k=a/b
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local a=$4
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local b=$5
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local equation="output=$L/(1+e(-($a/$b)*($x-$x0)));scale=0;output/1"
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local result=$(echo $equation | bc -lq)
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echo $result
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}
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interrupt () {
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echo '!! ATTENTION !!'
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end 'Received a signal to stop the script.' 0
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}
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pwmchip () {
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if [[ -z $PWMCHIP ]]; then
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PWMCHIP='pwmchip1'
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fi
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PWMCHIP_FOLDER='/sys/class/pwm/'$PWMCHIP'/'
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if [[ ! -d "$PWMCHIP_FOLDER" ]]; then
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echo '[pwm-fan] The sysfs interface for the '$PWMCHIP' is not accessible.'
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end 'Cannot access '$PWMCHIP' sysfs interface.' 1
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fi
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echo '[pwm-fan] Working with the sysfs interface for the '$PWMCHIP'.'
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echo '[pwm-fan] For reference, your '$PWMCHIP' supports '$(cat $PWMCHIP_FOLDER'npwm')' channel(s).'
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if [[ -z $CHANNEL ]]; then
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CHANNEL='pwm0'
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fi
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CHANNEL_FOLDER="$PWMCHIP_FOLDER""$CHANNEL"'/'
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}
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set_default () {
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cache 'set_default_duty_cycle'
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echo 0 2> $CACHE > $CHANNEL_FOLDER'duty_cycle'
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if [[ ! -z $(cat $CACHE) ]]; then
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# set higher than 0 values to avoid negative ones
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echo 100 > $CHANNEL_FOLDER'period'
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echo 10 > $CHANNEL_FOLDER'duty_cycle'
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fi
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cache 'set_default_period'
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echo $PERIOD 2> $CACHE > $CHANNEL_FOLDER'period'
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if [[ ! -z $(cat $CACHE) ]]; then
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echo '[pwm-fan] The period provided ('$PERIOD') is not acceptable.'
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echo '[pwm-fan] Trying to lower it by 100ns decrements. This may take a while...'
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local decrement=100
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local rate=$decrement
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until [[ $PERIOD_NEW -le 200 ]]; do
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local PERIOD_NEW=$((PERIOD-rate))
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> $CACHE
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echo $PERIOD_NEW 2> $CACHE > $CHANNEL_FOLDER'period'
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if [[ -z $(cat $CACHE) ]]; then
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break
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fi
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local rate=$((rate+decrement))
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done
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PERIOD=$PERIOD_NEW
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if [[ $PERIOD -le 100 ]]; then
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end 'Unable to set an appropriate value for the period.' 1
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fi
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fi
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echo 'normal' > $CHANNEL_FOLDER'polarity'
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echo '[pwm-fan] Default polarity: '$(cat $CHANNEL_FOLDER'polarity')
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echo '[pwm-fan] Default period: '$(cat $CHANNEL_FOLDER'period')' ns'
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echo '[pwm-fan] Default duty cycle: '$(cat $CHANNEL_FOLDER'duty_cycle')' ns'
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}
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start () {
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echo '####################################################'
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echo '# STARTING PWM-FAN SCRIPT'
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echo '# Date and time: '$(date)
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echo '####################################################'
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check_requisites
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}
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thermal_meter () {
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if [[ -f $TEMP_FILE ]]; then
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local TEMP=$(cat $TEMP_FILE 2> /dev/null)
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# TEMP is in millidegrees, so convert to degrees
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echo $((TEMP/1000))
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fi
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}
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thermal_monit () {
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if [[ -z $MONIT_DEVICE ]]; then
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# soc for legacy Kernel or cpu for latest Kernel
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MONIT_DEVICE='(soc|cpu)'
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fi
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local THERMAL_FOLDER='/sys/class/thermal/'
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if [[ -d $THERMAL_FOLDER && -z $SKIP_THERMAL ]]; then
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for dir in $THERMAL_FOLDER'thermal_zone'*; do
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if [[ $(cat $dir'/type') =~ $MONIT_DEVICE && -f $dir'/temp' ]]; then
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TEMP_FILE=$dir'/temp'
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echo '[pwm-fan] Found the '$MONIT_DEVICE' temperature at '$TEMP_FILE
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echo '[pwm-fan] Current '$MONIT_DEVICE' temp is: '$(($(thermal_meter)))' Celsius'
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echo '[pwm-fan] Setting fan to monitor the '$MONIT_DEVICE' temperature.'
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THERMAL_STATUS=1
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return
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fi
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done
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echo '[pwm-fan] Did not find the temperature for the device type: '$MONIT_DEVICE
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else
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echo '[pwm-fan] -f mode enabled or the the thermal zone cannot be found at '$THERMAL_FOLDER
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fi
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echo '[pwm-fan] Setting fan to operate independent of the '$MONIT_DEVICE' temperature.'
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THERMAL_STATUS=0
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}
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unexport_pwmchip_channel () {
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if [[ -d "$CHANNEL_FOLDER" ]]; then
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echo '[pwm-fan] Freeing up the channel '$CHANNEL' controlled by the '$PWMCHIP'.'
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echo 0 > $CHANNEL_FOLDER'enable'
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sleep 1
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echo 0 > $PWMCHIP_FOLDER'unexport'
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sleep 1
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if [[ ! -d "$CHANNEL_FOLDER" ]]; then
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echo '[pwm-fan] Channel '$CHANNEL' was disabled.'
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else
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echo '[pwm-fan] Channel '$CHANNEL' is still enabled. Please check '$CHANNEL_FOLDER'.'
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fi
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else
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echo '[pwm-fan] There is no channel to disable.'
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fi
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}
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usage() {
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echo ''
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echo 'Usage:'
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||||
echo ''
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echo "$0" '[OPTIONS]'
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echo ''
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echo ' Options:'
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echo ' -c str Name of the PWM CHANNEL (e.g., pwm0, pwm1). Default: pwm0'
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echo ' -C str Name of the PWM CONTROLLER (e.g., pwmchip0, pwmchip1). Default: pwmchip1'
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echo ' -d int Lowest DUTY CYCLE threshold (in percentage of the period). Default: 25'
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echo ' -D int Highest DUTY CYCLE threshold (in percentage of the period). Default: 100'
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echo ' -f Fan runs at FULL SPEED all the time. If omitted (default), speed depends on temperature.'
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echo ' -F int TIME (in seconds) to run the fan at full speed during STARTUP. Default: 60'
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echo ' -h Show this HELP message.'
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echo ' -l int TIME (in seconds) to LOOP thermal reads. Lower means higher resolution but uses ever more resources. Default: 10'
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echo ' -m str Name of the DEVICE to MONITOR the temperature in the thermal sysfs interface. Default: (soc|cpu)'
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echo ' -p int The fan PERIOD (in nanoseconds). Default (25kHz): 25000000.'
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echo ' -s int The MAX SIZE of the TEMPERATURE ARRAY. Interval between data points is set by -l. Default (store last 1min data): 6.'
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echo ' -t int Lowest TEMPERATURE threshold (in Celsius). Lower temps set the fan speed to min. Default: 25'
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echo ' -T int Highest TEMPERATURE threshold (in Celsius). Higher temps set the fan speed to max. Default: 75'
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echo ''
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echo ' If no options are provided, the script will run with default values.'
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echo ' Defaults have been tested and optimized for the following hardware:'
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||||
echo ' - NanoPi-M4 v2'
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echo ' - M4 SATA hat'
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echo ' - Fan 12V (.08A and .2A)'
|
||||
echo ' And software:'
|
||||
echo ' - Kernel: Linux 4.4.231-rk3399'
|
||||
echo ' - OS: Armbian Buster (20.08.9) stable'
|
||||
echo ' - GNU bash v5.0.3'
|
||||
echo ' - bc v1.07.1'
|
||||
echo ''
|
||||
echo 'Author: cgomesu'
|
||||
echo 'Repo: https://github.com/cgomesu/nanopim4-satahat-fan'
|
||||
echo ''
|
||||
echo 'This is free. There is NO WARRANTY. Use at your own risk.'
|
||||
echo ''
|
||||
}
|
||||
|
||||
while getopts 'c:C:d:D:fF:hl:m:p:s:t:T:' OPT; do
|
||||
case ${OPT} in
|
||||
c)
|
||||
CHANNEL="$OPTARG"
|
||||
if [[ ! $CHANNEL =~ ^pwm[0-9]+$ ]]; then
|
||||
echo 'The name of the pwm channel must contain pwm and at least a number (pwm0).'
|
||||
exit 1
|
||||
fi
|
||||
;;
|
||||
C)
|
||||
PWMCHIP="$OPTARG"
|
||||
if [[ ! $PWMCHIP =~ ^pwmchip[0-9]+$ ]]; then
|
||||
echo 'The name of the pwm controller must contain pwmchip and at least a number (pwmchip1).'
|
||||
exit 1
|
||||
fi
|
||||
;;
|
||||
d)
|
||||
DC_PERCENT_MIN="$OPTARG"
|
||||
if [[ ! $DC_PERCENT_MIN =~ ^([0-6][0-9]?|70)$ ]]; then
|
||||
echo 'The lowest duty cycle threshold must be an integer between 0 and 70.'
|
||||
exit 1
|
||||
fi
|
||||
;;
|
||||
D)
|
||||
DC_PERCENT_MAX="$OPTARG"
|
||||
if [[ ! $DC_PERCENT_MAX =~ ^([8-9][0-9]?|100)$ ]]; then
|
||||
echo 'The highest duty cycle threshold must be an integer between 80 and 100.'
|
||||
exit 1
|
||||
fi
|
||||
;;
|
||||
f)
|
||||
SKIP_THERMAL=1
|
||||
;;
|
||||
F)
|
||||
TIME_STARTUP="$OPTARG"
|
||||
if [[ ! $TIME_STARTUP =~ ^[0-9]+$ ]]; then
|
||||
echo 'The time to run the fan at full speed during startup must be an integer.'
|
||||
exit 1
|
||||
fi
|
||||
;;
|
||||
h)
|
||||
usage
|
||||
exit 0
|
||||
;;
|
||||
l)
|
||||
TIME_LOOP="$OPTARG"
|
||||
if [[ ! $TIME_LOOP =~ ^[0-9]+$ ]]; then
|
||||
echo 'The time to loop thermal reads must be an integer.'
|
||||
exit 1
|
||||
fi
|
||||
;;
|
||||
m)
|
||||
MONIT_DEVICE="$OPTARG"
|
||||
;;
|
||||
p)
|
||||
PERIOD="$OPTARG"
|
||||
if [[ ! $PERIOD =~ ^[0-9]+$ ]]; then
|
||||
echo 'The period must be an integer.'
|
||||
exit 1
|
||||
fi
|
||||
;;
|
||||
s)
|
||||
TEMPS_SIZE="$OPTARG"
|
||||
if [[ ! $TEMPS_SIZE =~ ^[0-9]+$ ]]; then
|
||||
echo 'The max size of the temperature array must be an integer.'
|
||||
exit 1
|
||||
fi
|
||||
;;
|
||||
t)
|
||||
THERMAL_ABS_THRESH_LOW="$OPTARG"
|
||||
if [[ ! $THERMAL_ABS_THRESH_LOW =~ ^[0-4][0-9]?$ ]]; then
|
||||
echo 'The lowest temperature threshold must be an integer between 0 and 49.'
|
||||
exit 1
|
||||
fi
|
||||
;;
|
||||
T)
|
||||
THERMAL_ABS_THRESH_HIGH="$OPTARG"
|
||||
if [[ ! $THERMAL_ABS_THRESH_HIGH =~ ^([5-9][0-9]?|1[0-1][0-9]?|120)$ ]]; then
|
||||
echo 'The highest temperature threshold must be an integer between 50 and 120.'
|
||||
exit 1
|
||||
fi
|
||||
;;
|
||||
\?)
|
||||
echo '!! ATTENTION !!'
|
||||
echo '................................'
|
||||
echo 'Detected an invalid option.'
|
||||
echo 'Try: '"$0"' -h'
|
||||
echo '................................'
|
||||
exit 1
|
||||
;;
|
||||
esac
|
||||
done
|
||||
|
||||
start
|
||||
trap 'interrupt' SIGINT SIGHUP SIGTERM SIGKILL
|
||||
config
|
||||
fan_run
|
||||
Reference in New Issue
Block a user