[05/12] of: irq: document properties for wakeup interrupt parent

Commit Message

Lina Iyer Nov. 14, 2019, 6:35 p.m. UTC

Some interrupt controllers in a SoC, are always powered on and have a
select interrupts routed to them, so that they can wakeup the SoC from
suspend. Add wakeup-parent DT property to refer to these interrupt
controllers.

Cc: [e-mail]
Signed-off-by: Lina Iyer <[e-mail]>
Reviewed-by: Rob Herring <[e-mail]>
Reviewed-by: Linus Walleij <[e-mail]>
---
Changes in v1:
	- Remove whitespace at end of patch
---
 .../devicetree/bindings/interrupt-controller/interrupts.txt  | 12 ++++++++++++
 1 file changed, 12 insertions(+)

Comments

Stephen Boyd Nov. 15, 2019, 7:03 p.m. UTC | #1

Quoting Lina Iyer (2019-11-14 10:35:14)
> Some interrupt controllers in a SoC, are always powered on and have a
> select interrupts routed to them, so that they can wakeup the SoC from
> suspend. Add wakeup-parent DT property to refer to these interrupt
> controllers.
> 
> Cc: [e-mail]
> Signed-off-by: Lina Iyer <[e-mail]>
> Reviewed-by: Rob Herring <[e-mail]>
> Reviewed-by: Linus Walleij <[e-mail]>
> ---

Reviewed-by: Stephen Boyd <[e-mail]>

Patch

diff --git a/Documentation/devicetree/bindings/interrupt-controller/interrupts.txt b/Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
index 4a3ee25..4ebfa00 100644
--- a/Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
+++ b/Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
@@ -108,3 +108,15 @@  commonly used:
 			sensitivity = <7>;
 		};
 	};
+
+3) Interrupt wakeup parent
+--------------------------
+
+Some interrupt controllers in a SoC, are always powered on and have a select
+interrupts routed to them, so that they can wakeup the SoC from suspend. These
+interrupt controllers do not fall into the category of a parent interrupt
+controller and can be specified by the "wakeup-parent" property and contain a
+single phandle referring to the wakeup capable interrupt controller.
+
+   Example:
+	wakeup-parent = <&pdc_intc>;