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-rw-r--r--Documentation/devicetree/bindings/tty/serial/of-serial.txt8
1 files changed, 7 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/tty/serial/of-serial.txt b/Documentation/devicetree/bindings/tty/serial/of-serial.txt
index b8b27b0aca1..1e1145ca4f3 100644
--- a/Documentation/devicetree/bindings/tty/serial/of-serial.txt
+++ b/Documentation/devicetree/bindings/tty/serial/of-serial.txt
@@ -9,11 +9,15 @@ Required properties:
- "ns16750"
- "ns16850"
- "nvidia,tegra20-uart"
+ - "nxp,lpc3220-uart"
- "ibm,qpace-nwp-serial"
- "serial" if the port type is unknown.
- reg : offset and length of the register set for the device.
- interrupts : should contain uart interrupt.
-- clock-frequency : the input clock frequency for the UART.
+- clock-frequency : the input clock frequency for the UART
+ or
+ clocks phandle to refer to the clk used as per Documentation/devicetree
+ /bindings/clock/clock-bindings.txt
Optional properties:
- current-speed : the current active speed of the UART.
@@ -24,6 +28,8 @@ Optional properties:
accesses to the UART (e.g. TI davinci).
- used-by-rtas : set to indicate that the port is in use by the OpenFirmware
RTAS and should not be registered.
+- no-loopback-test: set to indicate that the port does not implements loopback
+ test mode
Example: