From: Greentime Hu <greentime-MUIXKm3Oiri1Z/+hSey0Gg@public.gmane.org>

This patch adds nds32 L2 cache controller binding documents.

Signed-off-by: Greentime Hu <greentime-MUIXKm3Oiri1Z/+hSey0Gg@public.gmane.org>
---
 Documentation/devicetree/bindings/nds32/atl2c.txt |   29 +++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/nds32/atl2c.txt

diff --git a/Documentation/devicetree/bindings/nds32/atl2c.txt b/Documentation/devicetree/bindings/nds32/atl2c.txt
new file mode 100644
index 0000000..db9f7ec
--- /dev/null
+++ b/Documentation/devicetree/bindings/nds32/atl2c.txt

@@ -0,0 +1,29 @@
+* Andestech L2 cache Controller
+
+The level-2 cache controller plays an important role in reducing memory latency
+for high performance systems, such as thoese designs with AndesCore processors.
+Level-2 cache controller in general enhances overall system performance
+signigicantly and the system power consumption might be reduced as well by
+reducing DRAM accesses.
+
+This binding specifies what properties must be available in the device tree
+representation of an Andestech L2 cache controller.
+
+Required properties:
+	- compatible:
+		Usage: required
+		Value type: <string>
+		Definition: "andestech,atl2c"
+	- reg : Physical base address and size of cache controller's memory mapped
+	- cache-unified : Specifies the cache is a unified cache.
+	- cache-level : Should be set to 2 for a level 2 cache.
+
+* Example
+
+	L2: l2-cache@e0500000 {