Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / Documentation / devicetree / bindings / interrupt-controller / atmel,aic.txt

diff --git a/kernel/Documentation/devicetree/bindings/interrupt-controller/atmel,aic.txt b/kernel/Documentation/devicetree/bindings/interrupt-controller/atmel,aic.txt
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+* Advanced Interrupt Controller (AIC)
+
+Required properties:
+- compatible: Should be "atmel,<chip>-aic"
+  <chip> can be "at91rm9200", "sama5d3" or "sama5d4"
+- interrupt-controller: Identifies the node as an interrupt controller.
+- interrupt-parent: For single AIC system, it is an empty property.
+- #interrupt-cells: The number of cells to define the interrupts. It should be 3.
+  The first cell is the IRQ number (aka "Peripheral IDentifier" on datasheet).
+  The second cell is used to specify flags:
+    bits[3:0] trigger type and level flags:
+      1 = low-to-high edge triggered.
+      2 = high-to-low edge triggered.
+      4 = active high level-sensitive.
+      8 = active low level-sensitive.
+      Valid combinations are 1, 2, 3, 4, 8.
+      Default flag for internal sources should be set to 4 (active high).
+  The third cell is used to specify the irq priority from 0 (lowest) to 7
+  (highest).
+- reg: Should contain AIC registers location and length
+- atmel,external-irqs: u32 array of external irqs.
+
+Examples:
+       /*
+        * AIC
+        */
+       aic: interrupt-controller@fffff000 {
+               compatible = "atmel,at91rm9200-aic";
+               interrupt-controller;
+               interrupt-parent;
+               #interrupt-cells = <3>;
+               reg = <0xfffff000 0x200>;
+       };
+
+       /*
+        * An interrupt generating device that is wired to an AIC.
+        */
+       dma: dma-controller@ffffec00 {
+               compatible = "atmel,at91sam9g45-dma";
+               reg = <0xffffec00 0x200>;
+               interrupts = <21 4 5>;
+       };