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kernel_samsung_sm7125/Documentation/firmware_class/hotplug-script

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#!/bin/sh
# Simple hotplug script sample:
#
# Both $DEVPATH and $FIRMWARE are already provided in the environment.
HOTPLUG_FW_DIR=/usr/lib/hotplug/firmware/
if [ "$SUBSYSTEM" == "firmware" -a "$ACTION" == "add" ]; then
if [ -f $HOTPLUG_FW_DIR/$FIRMWARE ]; then
echo 1 > /sys/$DEVPATH/loading
cat $HOTPLUG_FW_DIR/$FIRMWARE > /sys/$DEVPATH/data
echo 0 > /sys/$DEVPATH/loading
else
echo -1 > /sys/$DEVPATH/loading
fi
fi