Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx>
---
.../interrupt-controller/nvidia,tegra-ictlr.txt | 43 ++++++++++++++++++++++
1 file changed, 43 insertions(+)
create mode 100644 Documentation/devicetree/bindings/interrupt-controller/nvidia,tegra-ictlr.txt
diff --git a/Documentation/devicetree/bindings/interrupt-controller/nvidia,tegra-ictlr.txt b/Documentation/devicetree/bindings/interrupt-controller/nvidia,tegra-ictlr.txt
new file mode 100644
index 0000000..1099fe0
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/nvidia,tegra-ictlr.txt
@@ -0,0 +1,43 @@
+NVIDIA Legacy Interrupt Controller
+
+All Tegra SoCs contain a legacy interrupt controller that routes
+interrupts to the GIC, and also serves as a wakeup source. It is also
+referred to as "ictlr", hence the name of the binding.
+
+The HW block exposes a number of interrupt controllers, each
+implementing a set of 32 interrupts.
+
+Required properties:
+
+- compatible : should be: "nvidia,tegra<chip>-ictlr". The LIC on
+ subsequent SoCs remained backwards-compatible with Tegra30, so on
+ Tegra generations later than Tegra30 the compatible value should
+ include "nvidia,tegra30-ictlr".
+- reg : Specifies base physical address and size of the registers.
+ Each controller must be described separately (Tegra20 has 4 of them,
+ whereas Tegra30 and later have 5"
+- interrupt-controller : Identifies the node as an interrupt controller.
+- #interrupt-cells : Specifies the number of cells needed to encode an
+ interrupt source. The value must be 3.
+- interrupt-parent : a phandle to the GIC these interrupts are routed
+ to.
+
+Notes:
+
+- Because this HW ultimately routes interrupts to the GIC, the
+ interrupt specifier must be that of the GIC.
+- Only SPIs can use the ictlr as an interrupt parent. SGIs and PPIs
+ are explicitly forbidden.
+
+Example:
+
+ ictlr: interrupt-controller@60004000 {
+ compatible = "nvidia,tegra20-ictlr", "nvidia,tegra-ictlr";
+ reg = <0x60004000 64>,
+ <0x60004100 64>,
+ <0x60004200 64>,
+ <0x60004300 64>;
+ interrupt-controller;
+ #interrupt-cells = <3>;
+ interrupt-parent = <&intc>;
+ };
--
2.1.4
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