dt-bindings: serial: add a new compatible string for SC9860

SC9860 use the same serial device which SC9836 uses, 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>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/Documentation/devicetree/bindings/serial/sprd-uart.txt b/Documentation/devicetree/bindings/serial/sprd-uart.txt
index 2aff0f22c9fa31837b9f49cd6d4213d14186f9e4..cab40f0f6f497ab7bc0b3ab9640bcc0563a8cddb 100644 (file)
--- a/Documentation/devicetree/bindings/serial/sprd-uart.txt
+++ b/Documentation/devicetree/bindings/serial/sprd-uart.txt
@@ -1,7 +1,19 @@
 * Spreadtrum serial UART
 
 Required properties:
-- compatible: must be "sprd,sc9836-uart"
+- compatible: must be one of:
+  * "sprd,sc9836-uart"
+  * "sprd,sc9860-uart", "sprd,sc9836-uart"
+
 - reg: offset and length of the register set for the device
 - interrupts: exactly one interrupt specifier
 - clocks: phandles to input clocks.
+
+Example:
+       uart0: serial@0 {
+               compatible = "sprd,sc9860-uart",
+                            "sprd,sc9836-uart";
+               reg = <0x0 0x100>;
+               interrupts = <GIC_SPI 2 IRQ_TYPE_LEVEL_HIGH>;
+               clocks = <&ext_26m>;
+       };