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[v4,2/6] dt-bindings: add binding for atmel-usart in SPI mode

Message ID 20180525171941.26766-3-radu.pirea@microchip.com (mailing list archive)
State New, archived
Headers show

Commit Message

Radu Pirea May 25, 2018, 5:19 p.m. UTC 
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>
---
 .../bindings/{serial => mfd}/atmel-usart.txt  | 25 +++++++++++++++++--
 1 file changed, 23 insertions(+), 2 deletions(-)
 rename Documentation/devicetree/bindings/{serial => mfd}/atmel-usart.txt (76%)

Comments

Rob Herring May 31, 2018, 1 a.m. UTC | #1 
On Fri, May 25, 2018 at 08:19:37PM +0300, Radu Pirea wrote:
> 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>
> ---
>  .../bindings/{serial => mfd}/atmel-usart.txt  | 25 +++++++++++++++++--
>  1 file changed, 23 insertions(+), 2 deletions(-)
>  rename Documentation/devicetree/bindings/{serial => mfd}/atmel-usart.txt (76%)

Reviewed-by: Rob Herring <robh@kernel.org>
Lee Jones June 13, 2018, 6:11 a.m. UTC | #2 
On Fri, 25 May 2018, Radu Pirea wrote:

> 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>
> ---
>  .../bindings/{serial => mfd}/atmel-usart.txt  | 25 +++++++++++++++++--
>  1 file changed, 23 insertions(+), 2 deletions(-)
>  rename Documentation/devicetree/bindings/{serial => mfd}/atmel-usart.txt (76%)

For my own reference:
  Acked-for-MFD-by: Lee Jones <lee.jones@linaro.org>
diff mbox

Patch

diff --git a/Documentation/devicetree/bindings/serial/atmel-usart.txt b/Documentation/devicetree/bindings/mfd/atmel-usart.txt
similarity index 76%
rename from Documentation/devicetree/bindings/serial/atmel-usart.txt
rename to Documentation/devicetree/bindings/mfd/atmel-usart.txt
index 7c0d6b2f53e4..3b9e18642c3b 100644
--- a/Documentation/devicetree/bindings/serial/atmel-usart.txt
+++ b/Documentation/devicetree/bindings/mfd/atmel-usart.txt
@@ -1,6 +1,6 @@ 
 * Atmel Universal Synchronous Asynchronous Receiver/Transmitter (USART)
 
-Required properties:
+Required properties for 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.
@@ -11,7 +11,13 @@  Required properties:
 	Required elements: "usart"
 - clocks: phandles to input clocks.
 
-Optional properties:
+Required properties for USART in SPI mode:
+- #size-cells      : Must be <0>
+- #address-cells   : Must be <1>
+- cs-gpios: chipselects (internal cs not supported)
+- atmel,usart-mode : Must be <USART_MODE_SPI> (found in dt-bindings/mfd/at91-usart.h)
+
+Optional properties in serial mode:
 - 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.
@@ -62,3 +68,18 @@  Example:
 		dma-names = "tx", "rx";
 		atmel,fifo-size = <32>;
 	};
+
+- SPI mode:
+	#include <dt-bindings/mfd/at91-usart.h>
+
+	spi0: spi@f001c000 {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		compatible = "atmel,at91rm9200-usart", "atmel,at91sam9260-usart";
+		atmel,usart-mode = <USART_MODE_SPI>;
+		reg = <0xf001c000 0x100>;
+		interrupts = <12 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&usart0_clk>;
+		clock-names = "usart";
+		cs-gpios = <&pioB 3 0>;
+	};