laptop-mode accepts lists of devices and modules

laptop-mode-tools_1.52/usr/share/laptop-mode-tools/modules/usb-autosuspend

 #! /bin/sh
 # 
 # Laptop mode tools module: usb-autosuspend.
 #
 
 blacklisted() {
         for usbid in $AUTOSUSPEND_USBID_BLACKLIST; do
                 if ! echo $usbid | grep -q ':'; then
                         log "MSG" "WARNING: Invalid entry \"$usbid\" in AUTOSUSPEND_USBID_BLACKLIST."
                 fi
@@ skipping 32 matching lines @@
     if [ $ON_AC -eq 1 ]; then
         if [ "$ACTIVATE" -eq 1 ]; then
             SUSPEND_USB_DEVICES="$LM_AC_SUSPEND_USB"
         else
             SUSPEND_USB_DEVICES="$NOLM_AC_SUSPEND_USB"
         fi
     else
         SUSPEND_USB_DEVICES="$BATT_SUSPEND_USB"
     fi
 
+    if [ -d /sys/bus/usb/devices ]; then
+        if [ "$DEVICES" != "" ]; then
+                # If a list of devices has been provided, operate on only the
+                # listed USB devices.
+                DEVICE_LIST=""
+                for DEVICE in $DEVICES; do
+                        DEVICE_LIST="$DEVICE_LIST $DEVICE"
+                done
+        else
+                # If no list was provided, operate on all USB devices
+                DEVICE_LIST=/sys/bus/usb/devices/*
+        fi
+    else
+        # This will rarely happen.
+        log "VERBOSE" "There are no USB devices."
+    fi
+
     if [ x$SUSPEND_USB_DEVICES = x1 ]; then
           if [ -f /sys/module/usbcore/parameters/autosuspend ]; then
               echo $AUTOSUSPEND_TIMEOUT > /sys/module/usbcore/parameters/autosuspend
               log "VERBOSE" "Enabling autosuspend mode for USBCORE Controller, with timeout $AUTOSUSPEND_TIMEOUT."
           else
               log "VERBOSE" "Not enabling autosuspend mode for USBCORE Controller. Not Supported"
           fi
-          if [ -d /sys/bus/usb/devices ]; then
-              for usb_device in /sys/bus/usb/devices/*;
+          if [ "$DEVICE_LIST" != "" ]; then
+              for usb_device in $DEVICE_LIST;
               do
                   usb_device=`basename $usb_device`;
                   if ! blacklisted /sys/bus/usb/devices/$usb_device; then
                         if ! blacklisted_by_type /sys/bus/usb/devices/$usb_device; then
                           if [ -f /sys/bus/usb/devices/$usb_device/power/autosuspend ]; then
                                   echo $AUTOSUSPEND_TIMEOUT > /sys/bus/usb/devices/$usb_device/power/autosuspend;
                                   log "VERBOSE" "Enabling auto suspend mode for usb device $usb_device."
                           else
                                   log "VERBOSE" "Not enabling auto suspend mode for usb device $usb_device"
                           fi
 
                           if [ -f /sys/bus/usb/devices/$usb_device/power/level ]; then
                                   echo "auto" > /sys/bus/usb/devices/$usb_device/power/level;
                                   log "VERBOSE" "Enabling auto power level for usb device $usb_device."
                           else
                                   log "VERBOSE" "Not enabling auto power level for usb device $usb_device"
                           fi
                         else
                           log "VERBOSE" "Device $usb_device has blacklisted driver type, skipping auto suspend."
                         fi
                   else
                           log "VERBOSE" "USB device $usbid is in the autosuspend blacklist."
                   fi
               done
-          else
-              # This will rarely happen.
-              log "VERBOSE" "There are no USB devices."
           fi
     else
           AUTOSUSPEND_TIMEOUT=0
           if [ -f /sys/module/usbcore/parameters/autosuspend ]; then
               echo $AUTOSUSPEND_TIMEOUT > /sys/module/usbcore/parameters/autosuspend
               log "VERBOSE" "Disabling autosuspend mode for USBCORE Controller, with timeout $AUTOSUSPEND_TIMEOUT."
           else
               log "VERBOSE" "Not disabling autosuspend mode for USBCORE Controller. Not Supported"
           fi
-          if [ -d /sys/bus/usb/devices ]; then
-              for usb_device in /sys/bus/usb/devices/*;
+          if [ "$DEVICE_LIST" != "" ]; then
+              for usb_device in $DEVICE_LIST;
               do
                   usb_device=`basename $usb_device`;
                   if [ -f /sys/bus/usb/devices/$usb_device/power/autosuspend ]; then
                       echo $AUTOSUSPEND_TIMEOUT > /sys/bus/usb/devices/$usb_device/power/autosuspend;
                       log "VERBOSE" "Disabling auto suspend mode for usb device $usb_device."
                   else
                       log "VERBOSE" "Not disabling auto suspend mode for usb device $usb_device"
                   fi
 
                   if [ -f /sys/bus/usb/devices/$usb_device/power/level ]; then
                       echo "on" > /sys/bus/usb/devices/$usb_device/power/level;
                       log "VERBOSE" "Enabling ON power level for usb device $usb_device."
                   else
                       log "VERBOSE" "Not enabling ON power level for usb device $usb_device"
                   fi
               done
-          else
-              # This will rarely happen.
-              log "VERBOSE" "There are no USB devices."
           fi
     fi
 else
     log "VERBOSE" "USB autosuspend is disabled."
 fi