tools: add sunxi-h3-i2c-reset.sh script

tools/sunxi-h3-i2c-reset.sh

@@ -0,0 +1,25 @@
+#!/bin/sh
+
+devices="1c2ac00.i2c 1c2b000.i2c"
+pins="8 9 28 30"
+driver_path="/sys/bus/platform/drivers/mv64xxx_i2c"
+
+driver_unbind() {
+	echo -n "$1" > "$driver_path/unbind"
+}
+
+driver_bind() {
+	echo -n "$1" > "$driver_path/bind"
+}
+
+for dev in $devices; do driver_unbind "$dev"; done
+echo "unbind done"
+
+for pin in pins; do
+	gpio mode $pin out
+	gpio write $pin 0
+done
+echo "gpio reset done"
+
+for dev in $devices; do driver_bind "$dev"; done
+echo "bind done"