5 - compatible: "st,stmpe-gpio"
8 - st,norequest-mask: bitmask specifying which GPIOs should _not_ be requestable
9 due to different usage (e.g. touch, keypad)
11 Node name must be stmpe_gpio and should be child node of stmpe node to which it
16 compatible = "st,stmpe-gpio";
17 st,norequest-mask = <0x20>; //gpio 5 can't be used