Add the documentation for the bindings describing the GICv3 ITS.
Signed-off-by: Marc Zyngier <marc.zyng...@arm.com>
---
Documentation/devicetree/bindings/arm/gic-v3.txt | 39 ++++++++++++++++++++++++
1 file changed, 39 insertions(+)
diff --git a/Documentation/devicetree/bindings/arm/gic-v3.txt
b/Documentation/devicetree/bindings/arm/gic-v3.txt
index 33cd05e..ddfade4 100644
--- a/Documentation/devicetree/bindings/arm/gic-v3.txt
+++ b/Documentation/devicetree/bindings/arm/gic-v3.txt
@@ -49,11 +49,29 @@ Optional
occupied by the redistributors. Required if more than one such
region is present.
+Sub-nodes:
+
+GICv3 has one or more Interrupt Translation Services (ITS) that are
+used to route Message Signalled Interrupts (MSI) to the CPUs.
+
+These nodes must have the following properties:
+- compatible : Should at least contain "arm,gic-v3-its".
+- msi-controller : Boolean property. Identifies the node as an MSI controller
+- reg: Specifies the base physical address and size of the ITS
+ registers.
+
+The main GIC node must contain the appropriate #address-cells,
+#size-cells and ranges properties for the reg property of all ITS
+nodes.
+
Examples:
gic: interrupt-controller@2cf00000 {
compatible = "arm,gic-v3";
#interrupt-cells = <3>;
+ #address-cells = <2>;
+ #size-cells = <2>;
+ ranges;
interrupt-controller;
reg = <0x0 0x2f000000 0 0x10000>, // GICD
<0x0 0x2f100000 0 0x200000>, // GICR
@@ -61,11 +79,20 @@ Examples:
<0x0 0x2c010000 0 0x2000>, // GICH
<0x0 0x2c020000 0 0x2000>; // GICV
interrupts = <1 9 4>;
+
+ gic-its@2c200000 {
+ compatible = "arm,gic-v3-its";
+ msi-controller;
+ reg = <0x0 0x2c200000 0 0x200000>;
+ };
};
gic: interrupt-controller@2c010000 {
compatible = "arm,gic-v3";
#interrupt-cells = <3>;
+ #address-cells = <2>;
+ #size-cells = <2>;
+ ranges;
interrupt-controller;
redistributor-stride = <0x0 0x40000>; // 256kB stride
#redistributor-regions = <2>;
@@ -76,4 +103,16 @@ Examples:
<0x0 0x2c060000 0 0x2000>, // GICH
<0x0 0x2c080000 0 0x2000>; // GICV
interrupts = <1 9 4>;
+
+ gic-its@2c200000 {
+ compatible = "arm,gic-v3-its";
+ msi-controller;
+ reg = <0x0 0x2c200000 0 0x200000>;
+ };
+
+ gic-its@2c400000 {
+ compatible = "arm,gic-v3-its";
+ msi-controller;
+ reg = <0x0 0x2c400000 0 0x200000>;
+ };
};
--
2.1.3
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