From: Georgi Vlaev <redacted>

Add device tree bindings document for the GPIO driver of
Juniper's CBC FPGA.

Signed-off-by: Georgi Vlaev <redacted>
[Ported from Juniper kernel]
Signed-off-by: Pantelis Antoniou <redacted>
---
 .../devicetree/bindings/gpio/jnx,gpio-cbc.txt      | 30 ++++++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/gpio/jnx,gpio-cbc.txt

diff --git a/Documentation/devicetree/bindings/gpio/jnx,gpio-cbc.txt b/Documentation/devicetree/bindings/gpio/jnx,gpio-cbc.txt
new file mode 100644
index 0000000..d205d0b
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/jnx,gpio-cbc.txt

@@ -0,0 +1,30 @@
+Juniper CBC FPGA GPIO block
+
+Required properties:
+
+- compatible:
+    Must be "jnx,cbc-gpio"
+
+Optional properties:
+
+- reg:
+    Address and length of the register set for the device. This is optional since
+    usually the parent MFD driver fills it in.
+
+- #gpio-cells:
+    Should be <2>.  The first cell is the pin number (within the controller's
+    pin space), and the second is used for the following flags:
+       bit[0]: direction (0 = out, 1 = in)
+       bit[1]: init high
+       bit[2]: active low