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| -rw-r--r-- | Documentation/devicetree/bindings/interrupt-controller/cdns,xtensa-pic.txt | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/interrupt-controller/cdns,xtensa-pic.txt b/Documentation/devicetree/bindings/interrupt-controller/cdns,xtensa-pic.txt new file mode 100644 index 000000000..026ef4cfc --- /dev/null +++ b/Documentation/devicetree/bindings/interrupt-controller/cdns,xtensa-pic.txt @@ -0,0 +1,25 @@ +* 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; + }; |