[PATCH V1 1/3] docs: dts: Add documentation for hi6220 SoC ION node

[Chen Feng <puck.chen@hisilicon.com>]

Documentation for hi6220 SoC ION node

Signed-off-by: Chen Feng <puck.chen@hisilicon.com>
Signed-off-by: Yu Dongbin <yudongbin@hisilicon.com>
---
 .../devicetree/bindings/staging/ion/hi6220-ion.txt | 31 ++++++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/staging/ion/hi6220-ion.txt

diff --git a/Documentation/devicetree/bindings/staging/ion/hi6220-ion.txt b/Documentation/devicetree/bindings/staging/ion/hi6220-ion.txt
new file mode 100644
index 0000000..97ba233
--- /dev/null
+++ b/Documentation/devicetree/bindings/staging/ion/hi6220-ion.txt
@@ -0,0 +1,31 @@
+Hi6220 SoC ION
+============================================================
+Required properties:
+- compatible : "hisilicon,hi6220-ion"
+- list of the ION heaps
+	- heap name : maybe heap_sys_user@0
+	- heap id   : id should be unique in the system.
+	- heap base : base ddr address of the heap,0 means that
+	it is dynamic.
+	- heap size : memory size and 0 means it is dynamic.
+	- heap type : the heap type of the heap, please also
+see the define in ion.h(drivers/staging/android/uapi/ion.h)
+------------------------------------------------------------
+Example:
+	hi6220-ion {
+		compatible = "hisilicon,hi6220-ion";
+		heap_sys_user@0 {
+			heap-name = "sys_user";
+			heap-id   = <0x0>;
+			heap-base = <0x0>;
+			heap-size = <0x0>;
+			heap-type = "ion_system";
+		};
+		heap_sys_contig@0 {
+			heap-name = "sys_contig";
+			heap-id   = <0x1>;
+			heap-base = <0x0>;
+			heap-size = <0x0>;
+			heap-type = "ion_system_contig";
+		};
+	};
-- 
1.9.1