This patch adds the DT bindings document for newly added Broadcom
SBA RAID driver.

Signed-off-by: Anup Patel <anup.pa...@broadcom.com>
Reviewed-by: Ray Jui <ray....@broadcom.com>
Reviewed-by: Scott Branden <scott.bran...@broadcom.com>
---
 .../devicetree/bindings/dma/brcm,iproc-sba.txt     | 29 ++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/dma/brcm,iproc-sba.txt

diff --git a/Documentation/devicetree/bindings/dma/brcm,iproc-sba.txt 
b/Documentation/devicetree/bindings/dma/brcm,iproc-sba.txt
new file mode 100644
index 0000000..092913a
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/brcm,iproc-sba.txt
@@ -0,0 +1,29 @@
+* Broadcom SBA RAID engine
+
+Required properties:
+- compatible: Should be one of the following
+             "brcm,iproc-sba"
+             "brcm,iproc-sba-v2"
+  The "brcm,iproc-sba" has support for only 6 PQ coefficients
+  The "brcm,iproc-sba-v2" has support for only 30 PQ coefficients
+- mboxes: List of phandle and mailbox channel specifiers
+
+Example:
+
+raid_mbox: mbox@67400000 {
+       ...
+       #mbox-cells = <3>;
+       ...
+};
+
+raid0 {
+       compatible = "brcm,iproc-sba-v2";
+       mboxes = <&raid_mbox 0 0x1 0xffff>,
+                <&raid_mbox 1 0x1 0xffff>,
+                <&raid_mbox 2 0x1 0xffff>,
+                <&raid_mbox 3 0x1 0xffff>,
+                <&raid_mbox 4 0x1 0xffff>,
+                <&raid_mbox 5 0x1 0xffff>,
+                <&raid_mbox 6 0x1 0xffff>,
+                <&raid_mbox 7 0x1 0xffff>;
+};
-- 
2.7.4

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