dt-bindings: Add binding for atmel-usart in SPI mode

This patch moves the bindings for serial from serial/atmel-usart.txt to
mfd/atmel-usart.txt and adds bindings for USART in SPI mode.

Signed-off-by: Radu Pirea <radu.pirea@microchip.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

1 files changed, 0 insertions, 64 deletions

diff --git a/Documentation/devicetree/bindings/serial/atmel-usart.txt b/Documentation/devicetree/bindings/serial/atmel-usart.txt
deleted file mode 100644
index 7c0d6b2f53e4..000000000000
--- a/Documentation/devicetree/bindings/serial/atmel-usart.txt
+++ /dev/null
@@ -1,64 +0,0 @@
-* Atmel Universal Synchronous Asynchronous Receiver/Transmitter (USART)
-
-Required properties:
-- 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.
-	Required elements: "usart"
-- clocks: phandles to input clocks.
-
-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
-- {rts,cts,dtr,dsr,rng,dcd}-gpios: specify a GPIO for RTS/CTS/DTR/DSR/RI/DCD line respectively.
-  It will use specified PIO instead of the peripheral function pin for the USART feature.
-  If unsure, don't specify this property.
-- 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.
-- atmel,fifo-size: maximum number of data the RX and TX FIFOs can store for FIFO
-  capable USARTs.
-- rs485-rts-delay, rs485-rx-during-tx, linux,rs485-enabled-at-boot-time: see rs485.txt
-
-<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>;
-		interrupts = <7>;
-		clocks = <&usart0_clk>;
-		clock-names = "usart";
-		atmel,use-dma-rx;
-		atmel,use-dma-tx;
-		rts-gpios = <&pioD 15 GPIO_ACTIVE_LOW>;
-		cts-gpios = <&pioD 16 GPIO_ACTIVE_LOW>;
-		dtr-gpios = <&pioD 17 GPIO_ACTIVE_LOW>;
-		dsr-gpios = <&pioD 18 GPIO_ACTIVE_LOW>;
-		dcd-gpios = <&pioD 20 GPIO_ACTIVE_LOW>;
-		rng-gpios = <&pioD 19 GPIO_ACTIVE_LOW>;
-	};
-
-- use DMA:
-	usart0: serial@f001c000 {
-		compatible = "atmel,at91sam9260-usart";
-		reg = <0xf001c000 0x100>;
-		interrupts = <12 4 5>;
-		clocks = <&usart0_clk>;
-		clock-names = "usart";
-		atmel,use-dma-rx;
-		atmel,use-dma-tx;
-		dmas = <&dma0 2 0x3>,
-		       <&dma0 2 0x204>;
-		dma-names = "tx", "rx";
-		atmel,fifo-size = <32>;
-	};