1*c66ec88fSEmmanuel Vadot* Xtensa built-in Programmable Interrupt Controller (PIC) 2*c66ec88fSEmmanuel Vadot 3*c66ec88fSEmmanuel VadotRequired properties: 4*c66ec88fSEmmanuel Vadot- compatible: Should be "cdns,xtensa-pic". 5*c66ec88fSEmmanuel Vadot- interrupt-controller: Identifies the node as an interrupt controller. 6*c66ec88fSEmmanuel Vadot- #interrupt-cells: The number of cells to define the interrupts. 7*c66ec88fSEmmanuel Vadot It may be either 1 or 2. 8*c66ec88fSEmmanuel Vadot When it's 1, the first cell is the internal IRQ number. 9*c66ec88fSEmmanuel Vadot When it's 2, the first cell is the IRQ number, and the second cell 10*c66ec88fSEmmanuel Vadot specifies whether it's internal (0) or external (1). 11*c66ec88fSEmmanuel Vadot Periferals are usually connected to a fixed external IRQ, but for different 12*c66ec88fSEmmanuel Vadot core variants it may be mapped to different internal IRQ. 13*c66ec88fSEmmanuel Vadot IRQ sensitivity and priority are fixed for each core variant and may not be 14*c66ec88fSEmmanuel Vadot changed at runtime. 15*c66ec88fSEmmanuel Vadot 16*c66ec88fSEmmanuel VadotExamples: 17*c66ec88fSEmmanuel Vadot pic: pic { 18*c66ec88fSEmmanuel Vadot compatible = "cdns,xtensa-pic"; 19*c66ec88fSEmmanuel Vadot /* one cell: internal irq number, 20*c66ec88fSEmmanuel Vadot * two cells: second cell == 0: internal irq number 21*c66ec88fSEmmanuel Vadot * second cell == 1: external irq number 22*c66ec88fSEmmanuel Vadot */ 23*c66ec88fSEmmanuel Vadot #interrupt-cells = <2>; 24*c66ec88fSEmmanuel Vadot interrupt-controller; 25*c66ec88fSEmmanuel Vadot }; 26