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[kuiper2.0] iiod_context.sh: clean up stale EEPROM context attributes on boot #109

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[kuiper2.0] iiod_context.sh: clean up stale EEPROM context attributes on boot #109

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14 changes: 14 additions & 0 deletions usb-gadget-service/scripts/iiod_context.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -137,8 +137,21 @@ replace_or_add dtoverlay "${OVERLAY}"

EXTRA_EEPROM_BOARDS="EVAL-CN0511-RPIZ"
EXTRA_EEPROM_FILE="/sys/devices/platform/soc/fe804000.i2c/i2c-1/1-0051/eeprom"
EXTRA_EEPROM_KEYS="/etc/libiio_eeprom_keys"
CAN_READ_EXTRA_EEPROM=0

# Remove stale EEPROM-sourced keys from a previous boot.
# A persistent key list is used because after a board swap the old EEPROM is
# physically absent, so its keys cannot be rediscovered by re-reading hardware.
if [ -f "$EXTRA_EEPROM_KEYS" ]; then
while read -r KEY; do
if [ -n "$KEY" ]; then
remove "$KEY"
fi
done < "$EXTRA_EEPROM_KEYS"
rm -f "$EXTRA_EEPROM_KEYS"
fi

if echo "$EXTRA_EEPROM_BOARDS" | grep -w -q "$NAME"; then
CAN_READ_EXTRA_EEPROM=1
fi
Expand All @@ -150,6 +163,7 @@ if [ "$CAN_READ_EXTRA_EEPROM" = "1" -a -f "$EXTRA_EEPROM_FILE" ]; then
EOF
if [ -n "$KEY" -a -n "$VALUE" ]; then
replace_or_add "$KEY" "$VALUE"
echo "$KEY" >> "$EXTRA_EEPROM_KEYS"
fi
done < "$EXTRA_EEPROM_FILE"
fi
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