eepromread: simple program to view eeprom contents

This program uses the i2c /dev interface to read the
contents of EEPROMs and display it to the user in
HEX and ASCII. It also has a mode that can display
data in label:value pairs. That mode is used for
board detection in the rc script to start the right
i2c drivers for the board.

Change-Id: I0bf5b13ffab5a89533c762d6881a145cf7f14914

etc/usr/rc

@@ -194,6 +194,30 @@ start)
 			-args instance=${bus}
 	done
 	echo .
+
+	BOARD_NAME=`eepromread -i | sed -n 's/^BOARD_NAME      : \(.*\)$/\1/p'`
+	case "${BOARD_NAME}" in
+		A335BONE)
+			echo "Detected BeagleBone"
+			echo -n "Starting i2c device drivers: "
+			test -e /dev/eepromb1s50 || (cd /dev && MAKEDEV eepromb1s50)
+			up cat24c256 -dev /dev/eepromb1s50 \
+				-label cat24c256.1.50 -args 'bus=1 address=0x50'
+			;;
+		A335BNLT)
+			echo "Detected BeagleBone Black"
+			echo -n "Starting i2c device drivers: "
+			test -e /dev/eepromb1s50 || (cd /dev && MAKEDEV eepromb1s50)
+			up cat24c256 -dev /dev/eepromb1s50 \
+				-label cat24c256.1.50 -args 'bus=1 address=0x50'
+			;;
+		UNKNOWN)
+			echo "Unable to detect board -- assuming BeagleBoard-xM"
+			echo -n "Starting i2c device drivers: "
+			;;
+	esac
+
+	echo .
     fi
 
     if [ "$net" ]