4 - compatible : Should be "st,asc".
5 - reg, reg-names, interrupts, interrupt-names : Standard way to define device
6 resources with names. look in
7 Documentation/devicetree/bindings/resource-names.txt
10 - st,hw-flow-ctrl bool flag to enable hardware flow control.
11 - st,force-m1 bool flat to force asc to be in Mode-1 recommeded
12 for high bit rates (above 19.2K)
15 compatible = "st,asc";
16 reg = <0xfe440000 0x2c>;
17 interrupts = <0 209 0>;