1* ARM AMBA Primecell PL011 & PL010 serial UART 2 3Required properties: 4- compatible: must be "arm,primecell", "arm,pl011" or "arm,pl010" 5- reg: exactly one register range with length 0x1000 6- clock: input clock frequency for the UART (used to calculate the baud 7 rate divisor) 8 9Optional properties: 10- skip-init: if present, the baud rate divisor is not changed 11