summaryrefslogtreecommitdiffstats
path: root/Documentation/devicetree/bindings/tty/serial/atmel-usart.txt
diff options
context:
space:
mode:
Diffstat (limited to 'Documentation/devicetree/bindings/tty/serial/atmel-usart.txt')
-rw-r--r--Documentation/devicetree/bindings/tty/serial/atmel-usart.txt27
1 files changed, 27 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/tty/serial/atmel-usart.txt b/Documentation/devicetree/bindings/tty/serial/atmel-usart.txt
new file mode 100644
index 0000000..a49d9a1
--- /dev/null
+++ b/Documentation/devicetree/bindings/tty/serial/atmel-usart.txt
@@ -0,0 +1,27 @@
+* Atmel Universal Synchronous Asynchronous Receiver/Transmitter (USART)
+
+Required properties:
+- compatible: Should be "atmel,<chip>-usart"
+ The compatible <chip> indicated will be the first SoC to support an
+ additional mode or an USART new feature.
+- reg: Should contain registers location and length
+- interrupts: Should contain interrupt
+
+Optional properties:
+- atmel,use-dma-rx: use of PDC or DMA for receiving data
+- atmel,use-dma-tx: use of PDC or DMA for transmitting data
+
+<chip> compatible description:
+- at91rm9200: legacy USART support
+- at91sam9260: generic USART implementation for SAM9 SoCs
+
+Example:
+
+ usart0: serial@fff8c000 {
+ compatible = "atmel,at91sam9260-usart";
+ reg = <0xfff8c000 0x4000>;
+ interrupts = <7>;
+ atmel,use-dma-rx;
+ atmel,use-dma-tx;
+ };
+
OpenPOWER on IntegriCloud