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-* Xtensa built-in Programmable Interrupt Controller (PIC)
-
-Required properties:
-- compatible: Should be "cdns,xtensa-pic".
-- interrupt-controller: Identifies the node as an interrupt controller.
-- #interrupt-cells: The number of cells to define the interrupts.
- It may be either 1 or 2.
- When it's 1, the first cell is the internal IRQ number.
- When it's 2, the first cell is the IRQ number, and the second cell
- specifies whether it's internal (0) or external (1).
- Periferals are usually connected to a fixed external IRQ, but for different
- core variants it may be mapped to different internal IRQ.
- IRQ sensitivity and priority are fixed for each core variant and may not be
- changed at runtime.
-
-Examples:
- pic: pic {
- compatible = "cdns,xtensa-pic";
- /* one cell: internal irq number,
- * two cells: second cell == 0: internal irq number
- * second cell == 1: external irq number
- */
- #interrupt-cells = <2>;
- interrupt-controller;
- };