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