Add a common binding for describing serial/UART attached devices. Common
examples are Bluetooth, WiFi, NFC and GPS devices.

Serial attached devices are represented as child nodes of a UART node.
This may need to be extended for more complex devices with multiple
interfaces, but for the simple cases a child node is sufficient.

Signed-off-by: Rob Herring <redacted>
---
 .../devicetree/bindings/serial/slave-device.txt    | 34 ++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/serial/slave-device.txt

diff --git a/Documentation/devicetree/bindings/serial/slave-device.txt b/Documentation/devicetree/bindings/serial/slave-device.txt
new file mode 100644
index 000000000000..9b7c2d651345
--- /dev/null
+++ b/Documentation/devicetree/bindings/serial/slave-device.txt

@@ -0,0 +1,34 @@
+Serial Slave Device DT binding
+
+This documents the binding structure and common properties for serial
+attached devices. Common examples include Bluetooth, WiFi, NFC and GPS
+devices.
+
+qSerial