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-* ARM Nested Vector Interrupt Controller (NVIC)
-
-The NVIC provides an interrupt controller that is tightly coupled to
-Cortex-M based processor cores. The NVIC implemented on different SoCs
-vary in the number of interrupts and priority bits per interrupt.
-
-Main node required properties:
-
-- compatible : should be one of:
- "arm,v6m-nvic"
- "arm,v7m-nvic"
- "arm,v8m-nvic"
-- interrupt-controller : Identifies the node as an interrupt controller
-- #interrupt-cells : Specifies the number of cells needed to encode an
- interrupt source. The type shall be a <u32> and the value shall be 2.
-
- The 1st cell contains the interrupt number for the interrupt type.
-
- The 2nd cell is the priority of the interrupt.
-
-- reg : Specifies base physical address(s) and size of the NVIC registers.
- This is at a fixed address (0xe000e100) and size (0xc00).
-
-- arm,num-irq-priority-bits: The number of priority bits implemented by the
- given SoC
-
-Example:
-
- intc: interrupt-controller@e000e100 {
- compatible = "arm,v7m-nvic";
- #interrupt-cells = <2>;
- #address-cells = <1>;
- interrupt-controller;
- reg = <0xe000e100 0xc00>;
- arm,num-irq-priority-bits = <4>;
- };