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 <r...@kernel.org>
---
v2:
- Drop reg property
- Add max-speed property
.../devicetree/bindings/serial/slave-device.txt | 36 ++++++++++++++++++++++
1 file changed, 36 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..f66037928f5f
--- /dev/null
+++ b/Documentation/devicetree/bindings/serial/slave-device.txt
@@ -0,0 +1,36 @@
+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.
+
+Serial attached devices shall be a child node of the host UART device the
+slave device is attached to. It is expected that the attached device is
+the only child node of the UART device. The slave device node name shall
+reflect the generic type of device for the node.
+
+Required Properties:
+
+- compatible : A string reflecting the vendor and specific device the node
+ represents.
+
+Optional Properties:
+
+- max-speed : The maximum baud rate the device operates at. This should
+ only be present if the maximum is less than the slave device
+ can support. For example, a particular board has some signal
+ quality issue or the host processor can't support higher
+ baud rates.
+
+Example:
+
+serial@1234 {
+ compatible = "ns16550a";
+ interrupts = <1>;
+
+ bluetooth {
+ compatible = "brcm,bcm43341-bt";
+ interrupt-parent = <&gpio>;
+ interrupts = <10>;
+ };
+};
--
2.10.1
