The GICv2 can have virtualization extension support, consisting
of an additional set of registers and interrupts. Add the necessary
binding to the GIC DT documentation.
Signed-off-by: Marc Zyngier <marc.zyngier at arm.com>
---
Documentation/devicetree/bindings/arm/gic.txt | 35 +++++++++++++++++++++++-
1 files changed, 33 insertions(+), 2 deletions(-)
diff --git a/Documentation/devicetree/bindings/arm/gic.txt b/Documentation/devicetree/bindings/arm/gic.txt
index 9b4b82a..62eb8df 100644
--- a/Documentation/devicetree/bindings/arm/gic.txt
+++ b/Documentation/devicetree/bindings/arm/gic.txt
@@ -11,7 +11,9 @@ have PPIs or SGIs.
Main node required properties:
- compatible : should be one of:
+ "arm,cortex-a15-gic"
"arm,cortex-a9-gic"
+ "arm,cortex-a7-gic"
"arm,arm11mp-gic"
- interrupt-controller : Identifies the node as an interrupt controller
- #interrupt-cells : Specifies the number of cells needed to encode an
@@ -39,8 +41,9 @@ Main node required properties:
the GIC cpu interface register base and size.
Optional
-- interrupts : Interrupt source of the parent interrupt controller. Only
- present on secondary GICs.
+- interrupts : Interrupt source of the parent interrupt controller on
+ secondary GICs, or VGIC maintainance interrupt on primary GIC (see
+ below).
- cpu-offset : per-cpu offset within the distributor and cpu interface
regions, used when the GIC doesn't have banked registers. The offset is
@@ -57,3 +60,31 @@ Example:
<0xfff10100 0x100>;
};
+
+* GIC virtualization extensions (VGIC)
+
+For ARM cores that support the virtualization extensions, additional
+properties must be described (they only exist if the GIC is the
+primary interrupt controller).
+
+Required properties:
+
+- reg : Additional regions specifying the base physical address and
+ size of the VGIC registers. The first additional region is the GIC
+ virtual interface control register base and size. The 2nd additional
+ region is the GIC virtual cpu interface register base and size.
+
+- interrupts : VGIC maintainance interrupt.
+
+Example:
+
+ interrupt-controller at 2c001000 {
+ compatible = "arm,cortex-a15-gic";
+ #interrupt-cells = <3>;
+ interrupt-controller;
+ reg = <0x2c001000 0x1000>,
+ <0x2c002000 0x1000>,
+ <0x2c004000 0x2000>,
+ <0x2c006000 0x2000>;
+ interrupts = <1 9 0xf04>;
+ };
--
1.7.7.1
