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