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-rw-r--r--Bindings/serial/atmel-usart.txt6
1 files changed, 5 insertions, 1 deletions
diff --git a/Bindings/serial/atmel-usart.txt b/Bindings/serial/atmel-usart.txt
index a6391e70a8fd..e6e6142e33ac 100644
--- a/Bindings/serial/atmel-usart.txt
+++ b/Bindings/serial/atmel-usart.txt
@@ -1,9 +1,10 @@
* Atmel Universal Synchronous Asynchronous Receiver/Transmitter (USART)
Required properties:
-- compatible: Should be "atmel,<chip>-usart"
+- compatible: Should be "atmel,<chip>-usart" or "atmel,<chip>-dbgu"
The compatible <chip> indicated will be the first SoC to support an
additional mode or an USART new feature.
+ For the dbgu UART, use "atmel,<chip>-dbgu", "atmel,<chip>-usart"
- reg: Should contain registers location and length
- interrupts: Should contain interrupt
- clock-names: tuple listing input clock names.
@@ -21,6 +22,8 @@ Optional properties:
memory peripheral interface and USART DMA channel ID, FIFO configuration.
Refer to dma.txt and atmel-dma.txt for details.
- dma-names: "rx" for RX channel, "tx" for TX channel.
+- atmel,fifo-size: maximum number of data the RX and TX FIFOs can store for FIFO
+ capable USARTs.
<chip> compatible description:
- at91rm9200: legacy USART support
@@ -56,4 +59,5 @@ Example:
dmas = <&dma0 2 0x3>,
<&dma0 2 0x204>;
dma-names = "tx", "rx";
+ atmel,fifo-size = <32>;
};