[PATCH v2 1/3] dt-bindings: aspeed-lpc: Add UART routing compatible string

[Chia-Wei Wang]

Add the compatible string and the device tree description for the
Aspeed AST25xx/AST26xx UART routing control.

Signed-off-by: Chia-Wei Wang <chiawei_wang at aspeedtech.com>
---
 .../devicetree/bindings/mfd/aspeed-lpc.txt    | 22 +++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/Documentation/devicetree/bindings/mfd/aspeed-lpc.txt b/Documentation/devicetree/bindings/mfd/aspeed-lpc.txt
index 936aa108eab4..45d44f812e5e 100644
--- a/Documentation/devicetree/bindings/mfd/aspeed-lpc.txt
+++ b/Documentation/devicetree/bindings/mfd/aspeed-lpc.txt
@@ -155,3 +155,25 @@ lpc_reset: reset-controller at 98 {
         reg = <0x98 0x4>;
         #reset-cells = <1>;
 };
+
+UART routing control
+--------------------
+
+The UART routing control manages the RX muxes among the UART controllers
+and the I/O pins. This is typicall used for the Serial-Over-Lan (SOL)
+service.
+
+Required properties:
+
+ - compatible:		One of:
+			"aspeed,ast2500-uart-routing";
+			"aspeed,ast2600-uart-routing";
+
+ - reg:			offset and length of the IP in the LPC memory region
+
+Example:
+
+uart_routing: uart-routing at 98 {
+	compatible = "aspeed,ast2600-uart-routing";
+	reg = <0x98 0x8>;
+};
-- 
2.17.1