[PATCH 02/10] mfd: dt-bindings: Add bindings for the Juniper I2CS MFD

[Pantelis Antoniou <pantelis.antoniou@xxxxxxxxxxxx>]

From: Georgi Vlaev <gvlaev@xxxxxxxxxxx>

Add device tree bindings for the Juniper I2CS MFD driver.

Signed-off-by: Georgi Vlaev <gvlaev@xxxxxxxxxxx>
[Ported from Juniper kernel]
Signed-off-by: Pantelis Antoniou <pantelis.antoniou@xxxxxxxxxxxx>
---
 Documentation/devicetree/bindings/mfd/jnx-i2cs.txt | 68 ++++++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/jnx-i2cs.txt

diff --git a/Documentation/devicetree/bindings/mfd/jnx-i2cs.txt b/Documentation/devicetree/bindings/mfd/jnx-i2cs.txt
new file mode 100644
index 0000000..0ec103b
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/jnx-i2cs.txt
@@ -0,0 +1,68 @@
+Device-Tree bindings for Juniper Networks I2CS FPGA MFD
+
+Required properties:
+- compatible - Must be one of:
+	"jnx,i2cs-rcb"	(Routing Engine or Control Board FRUs)
+	"jnx,i2cs-fpc"	(Flexible Port Concentrator FRUs)
+	"jnx,i2cs-sib"	(Switching Interface Board FRUs)
+	"jnx,i2cs-fan"	(Fan Tray FRUs)
+
+Optional properties:
+
+Depending on the FRU, the I2CS MFD has varied group of sub-devices:
+
+Device                   Description
+------                   -----------
+jnx,i2cs-gpio		: Virtual gpio mapping driver
+jnx,i2cs-fan-hwmon	: hwmon driver for fan trays
+jnx,i2c-mux-i2cs	: I2C Mux driver for FPC FRUs
+jnx,leds-i2cs		: Led driver
+
+All these optional nodes are described in their respective binding
+documents.
+
+Example node:
+
+i2cs@54 {
+	compatible = "jnx,i2cs-fpc";
+	reg = <0x54>;
+	#address-cells = <0>;
+	#size-cells = <0>;
+
+	fpc2_mux {
+		compatible = "jnx,i2c-mux-i2cs";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		fpc2i2c0: i2c@0 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0>;
+		};
+	};
+
+	fpc2_gpiomap: gpio-jnx-i2cs {
+		compatible = "jnx,gpio-i2cs";
+		reg = <0x54>;
+		#gpio-cells = <2>;
+		gpio-controller;
+		interrupt-controller;
+
+		/*
+		 * Map bits [0-3] of reg 0x21 as gpio inputs, bits [4-7]
+		 * as gpio outputs
+		 */
+		i2c-gpio-map = <0x21 0x0f>;
+	};
+
+	leds-jnx-i2cs {
+		compatible = "jnx,leds-i2cs";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		sib8-active {
+			reg = <0>;
+			linux,default-trigger = "sib8-active";
+		};
+	};
+};
-- 
1.9.1

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