[PATCH 2/2] dt-bindings: rtc: Add ASPEED description

[Joel Stanley]

Describe the RTC as used in the ASPEED ast2400 and ast2500 SoCs.

Signed-off-by: Joel Stanley <joel at jms.id.au>
---
 .../devicetree/bindings/rtc/rtc-aspeed.txt     | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/rtc/rtc-aspeed.txt

diff --git a/Documentation/devicetree/bindings/rtc/rtc-aspeed.txt b/Documentation/devicetree/bindings/rtc/rtc-aspeed.txt
new file mode 100644
index 000000000000..d31a4d24c75f
--- /dev/null
+++ b/Documentation/devicetree/bindings/rtc/rtc-aspeed.txt
@@ -0,0 +1,18 @@
+ASPEED BMC RTC
+==============
+
+Required properties:
+ - compatible: should be one of the following
+   * aspeed,ast2400-rtc for the ast2400
+   * aspeed,ast2500-rtc for the ast2500
+
+ - reg: physical base address of the controller and length of memory mapped
+   region
+
+Example:
+
+   rtc at 1e781000 {
+           compatible = "aspeed,ast2400-rtc";
+           reg = <0x1e781000 0x18>;
+           status = "disabled";
+   };
-- 
2.17.1