[PATCH v3 4/5] dt-bindings: Document brcm,int-fwd-mask property for bcm7038-l1-intc

[Florian Fainelli <f.fainelli@gmail.com>]

Indicate that the brcm,int-fwd-mask property is optional and can be set
on platforms which require to leave specific interrupts unmanaged by
Linux and need to retain the firmware configuration.

Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
 .../bindings/interrupt-controller/brcm,bcm7038-l1-intc.txt  | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/interrupt-controller/brcm,bcm7038-l1-intc.txt b/Documentation/devicetree/bindings/interrupt-controller/brcm,bcm7038-l1-intc.txt
index 4eb043270f5b..5ddef1dc0c1a 100644
--- a/Documentation/devicetree/bindings/interrupt-controller/brcm,bcm7038-l1-intc.txt
+++ b/Documentation/devicetree/bindings/interrupt-controller/brcm,bcm7038-l1-intc.txt
@@ -36,6 +36,12 @@ Optional properties:
 - brcm,irq-can-wake: If present, this means the L1 controller can be used as a
   wakeup source for system suspend/resume.
 
+Optional properties:
+
+- brcm,int-fwd-mask: if present, a bit mask to indicate which interrupts
+  have already been configured by the firmware and should be left unmanaged.
+  This should have one 32-bit word per status/set/clear/mask group.
+
 If multiple reg ranges and interrupt-parent entries are present on an SMP
 system, the driver will allow IRQ SMP affinity to be set up through the
 /proc/irq/ interface.  In the simplest possible configuration, only one
-- 
2.17.1