1*b67c961cSMax Filippov* Xtensa built-in Programmable Interrupt Controller (PIC) 2*b67c961cSMax Filippov 3*b67c961cSMax FilippovRequired properties: 4*b67c961cSMax Filippov- compatible: Should be "cdns,xtensa-pic". 5*b67c961cSMax Filippov- interrupt-controller: Identifies the node as an interrupt controller. 6*b67c961cSMax Filippov- #interrupt-cells: The number of cells to define the interrupts. 7*b67c961cSMax Filippov It may be either 1 or 2. 8*b67c961cSMax Filippov When it's 1, the first cell is the internal IRQ number. 9*b67c961cSMax Filippov When it's 2, the first cell is the IRQ number, and the second cell 10*b67c961cSMax Filippov specifies whether it's internal (0) or external (1). 11*b67c961cSMax Filippov Periferals are usually connected to a fixed external IRQ, but for different 12*b67c961cSMax Filippov core variants it may be mapped to different internal IRQ. 13*b67c961cSMax Filippov IRQ sensitivity and priority are fixed for each core variant and may not be 14*b67c961cSMax Filippov changed at runtime. 15*b67c961cSMax Filippov 16*b67c961cSMax FilippovExamples: 17*b67c961cSMax Filippov pic: pic { 18*b67c961cSMax Filippov compatible = "cdns,xtensa-pic"; 19*b67c961cSMax Filippov /* one cell: internal irq number, 20*b67c961cSMax Filippov * two cells: second cell == 0: internal irq number 21*b67c961cSMax Filippov * second cell == 1: external irq number 22*b67c961cSMax Filippov */ 23*b67c961cSMax Filippov #interrupt-cells = <2>; 24*b67c961cSMax Filippov interrupt-controller; 25*b67c961cSMax Filippov }; 26