[PATCH 1/2] dt-bindings: irq: add binding for Freescale IRQSTEER multiplexer

[Lucas Stach <l.stach@pengutronix.de>]

This adds the DT binding for the Freescale IRQSTEER interrupt
multiplexer found in the i.MX8 familiy SoCs.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
---
 .../interrupt-controller/fsl,irqsteer.txt     | 39 +++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/interrupt-controller/fsl,irqsteer.txt

diff --git a/Documentation/devicetree/bindings/interrupt-controller/fsl,irqsteer.txt b/Documentation/devicetree/bindings/interrupt-controller/fsl,irqsteer.txt
new file mode 100644
index 000000000000..ed2b18165591
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/fsl,irqsteer.txt
@@ -0,0 +1,39 @@
+Freescale IRQSTEER Interrupt multiplexer
+
+Required properties:
+
+- compatible: should be:
+	- "fsl,imx8m-irqsteer"
+	- "fsl,imx-irqsteer"
+- reg: Physical base address and size of registers.
+- interrupts: Should contain the parent interrupt line used to multiplex the
+  input interrupts.
+- clocks: Should contain one clock for entry in clock-names
+  see Documentation/devicetree/bindings/clock/clock-bindings.txt
+- clock-names:
+   - "ipg": main logic clock
+- 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 2.
+
+Optional properties:
+- fsl,channel: Number of channels managed by this controller. Each channel
+  contains up to 32 interrupt sources. If absent defaults to 1.
+- fsl,endian:
+  0: controller registers are little endian
+  1: controller registers are big endian
+  If absent defaults to 0.
+
+Example:
+
+	interrupt-controller@32e2d000 {
+		compatible = "fsl,imx8m-irqsteer", "fsl,imx-irqsteer";
+		reg = <0x32e2d000 0x1000>;
+		interrupts = <GIC_SPI 18 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&clk IMX8MQ_CLK_DISP_APB_ROOT>;
+		clock-names = "ipg";
+		fsl,channel = <2>;
+		fsl,endian = <1>;
+		interrupt-controller;
+		#interrupt-cells = <2>;
+	};
-- 
2.19.0