[PATCH V3 3/4] dt-bindings: serial: add a new compatible string for SC9860

[Chunyan Zhang <chunyan.zhang@spreadtrum.com>]

SC9860 use the same serial device, so added a new compatible string to
support SC9860 as well, also added an example of how to describe this
serial device in DT.

Signed-off-by: Chunyan Zhang <chunyan.zhang@spreadtrum.com>
---
 Documentation/devicetree/bindings/serial/sprd-uart.txt | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/serial/sprd-uart.txt b/Documentation/devicetree/bindings/serial/sprd-uart.txt
index 2aff0f2..8bd8144 100644
--- a/Documentation/devicetree/bindings/serial/sprd-uart.txt
+++ b/Documentation/devicetree/bindings/serial/sprd-uart.txt
@@ -1,7 +1,20 @@
 * Spreadtrum serial UART
 
 Required properties:
-- compatible: must be "sprd,sc9836-uart"
+- compatible must contain:
+  * "sprd,sc9836-uart" for SC9836 and all Spreadtrum SoCs
+  This also can be specific with:
+  * "sprd,sc9860-uart" for SC9860
+
 - reg: offset and length of the register set for the device
 - interrupts: exactly one interrupt specifier
 - clocks: phandles to input clocks.
+
+Example:
+	uart0: serial@70000000 {
+		compatible = "sprd,sc9860-uart",
+			     "sprd,sc9836-uart";
+		reg = <0x000000 0x100>;
+		interrupts = <GIC_SPI 2 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&ext_26m>;
+	};
-- 
2.7.4