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* ARM AMBA Primecell PL011 serial UART
Required properties:
- compatible: must be "arm,primecell", "arm,pl011"
- reg: exactly one register range with length 0x1000
- interrupts: exactly one interrupt specifier
Optional properties:
- pinctrl: When present, must have one state named "sleep"
and one state named "default"
- clocks: When present, must refer to exactly one clock named
"apb_pclk"
- dmas: When present, may have one or two dma channels.
The first one must be named "rx", the second one
must be named "tx".
See also bindings/arm/primecell.txt
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