dt-bindings: gemini: augment Gemini bindings to reflect Faraday origin

When we merged the Gemini interrupt controller it was not yet
discovered that this IP block is actually a standard Faraday
Technology interrupt controller.

As the IP block will probably appear in other designs as well,
let's augment the DT bindings to reflect that it is first and
foremost a standard Faraday part with a function name (FTINTC010)
so that people reusing the IP easily find the driver they need.

Sorry for the mistakes due to lack of information.

Cc: Greentime Hu <green.hu@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Hans Ulli Kroll <ulli.kroll@googlemail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>

1 files changed, 25 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/interrupt-controller/faraday,ftintc010.txt b/Documentation/devicetree/bindings/interrupt-controller/faraday,ftintc010.txt
new file mode 100644
index 000000000000..24428d47f487
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/faraday,ftintc010.txt
@@ -0,0 +1,25 @@
+* Faraday Technologt FTINTC010 interrupt controller
+
+This interrupt controller is a stock IP block from Faraday Technology found
+in the Gemini SoCs and other designs.
+
+Required properties:
+- compatible: must be one of
+  "faraday,ftintc010"
+  "cortina,gemini-interrupt-controller" (deprecated)
+- reg: The register bank for the interrupt controller.
+- interrupt-controller: Identifies the node as an interrupt controller
+- #interrupt-cells: The number of cells to define the interrupts.
+  Must be 2 as the controller can specify level or rising edge
+  IRQs. The bindings follows the standard binding for controllers
+  with two cells specified in
+  interrupt-controller/interrupts.txt
+
+Example:
+
+interrupt-controller@48000000 {
+	compatible = "faraday,ftintc010"
+	reg = <0x48000000 0x1000>;
+	interrupt-controller;
+	#interrupt-cells = <2>;
+};