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| author | Elen Song <elen.song@atmel.com> | 2013-07-22 12:30:31 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-07-30 00:05:08 +0400 |
| commit | e469719344ae1cdde90a4c8c3746588f8c86f6cf (patch) | |
| tree | ae00b8eb6c916ec7feb973bb90d85ac65e550a26 /Documentation/devicetree/bindings/tty/serial | |
| parent | 2e68c22fde9b001e41d47185a5b7612da60d8c33 (diff) | |
| download | linux-e469719344ae1cdde90a4c8c3746588f8c86f6cf.tar.xz | |
serial: at91: add dma support in usart binding descriptions
Signed-off-by: Elen Song <elen.song@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/devicetree/bindings/tty/serial')
| -rw-r--r-- | Documentation/devicetree/bindings/tty/serial/atmel-usart.txt | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/tty/serial/atmel-usart.txt b/Documentation/devicetree/bindings/tty/serial/atmel-usart.txt index a49d9a1d4ccf..2191dcb9f1da 100644 --- a/Documentation/devicetree/bindings/tty/serial/atmel-usart.txt +++ b/Documentation/devicetree/bindings/tty/serial/atmel-usart.txt @@ -10,13 +10,18 @@ Required properties: 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 +- add dma bindings for dma transfer: + - dmas: DMA specifier, consisting of a phandle to DMA controller node, + 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. <chip> compatible description: - at91rm9200: legacy USART support - at91sam9260: generic USART implementation for SAM9 SoCs Example: - +- use PDC: usart0: serial@fff8c000 { compatible = "atmel,at91sam9260-usart"; reg = <0xfff8c000 0x4000>; @@ -25,3 +30,14 @@ Example: atmel,use-dma-tx; }; +- use DMA: + usart0: serial@f001c000 { + compatible = "atmel,at91sam9260-usart"; + reg = <0xf001c000 0x100>; + interrupts = <12 4 5>; + atmel,use-dma-rx; + atmel,use-dma-tx; + dmas = <&dma0 2 0x3>, + <&dma0 2 0x204>; + dma-names = "tx", "rx"; + }; |