disable FB

hc

2024-01-04 1543e317f1da31b75942316931e8f491a8920811

 kernel/Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
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@@ -22,10 +22,10 @@
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 interrupt client node or in any of its parent nodes. Interrupts listed in the
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 "interrupts" property are always in reference to the node's interrupt parent.
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-The "interrupts-extended" property is a special form for use when a node needs
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-to reference multiple interrupt parents. Each entry in this property contains
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-both the parent phandle and the interrupt specifier. "interrupts-extended"
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-should only be used when a device has multiple interrupt parents.
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+The "interrupts-extended" property is a special form; useful when a node needs
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+to reference multiple interrupt parents or a different interrupt parent than
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+the inherited one. Each entry in this property contains both the parent phandle
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+and the interrupt specifier.
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   Example:
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 	interrupts-extended = <&intc1 5 1>, <&intc2 1 0>;
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@@ -108,3 +108,15 @@
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 			sensitivity = <7>;
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 		};
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 	};
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+
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+3) Interrupt wakeup parent
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+--------------------------
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+
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+Some interrupt controllers in a SoC, are always powered on and have a select
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+interrupts routed to them, so that they can wakeup the SoC from suspend. These
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+interrupt controllers do not fall into the category of a parent interrupt
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+controller and can be specified by the "wakeup-parent" property and contain a
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+single phandle referring to the wakeup capable interrupt controller.
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+
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+   Example:
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+	wakeup-parent = <&pdc_intc>;