These are bindings for at91-usart IP in spi spi mode. There is no support for
internal chip select. Only kind of chip selects available are gpio chip
selects.
Signed-off-by: Radu Pirea <radu.pi...@microchip.com>
---
.../bindings/spi/microchip,at91-usart-spi.txt | 24 +++++++++++++++++++
1 file changed, 24 insertions(+)
create mode 100644
Documentation/devicetree/bindings/spi/microchip,at91-usart-spi.txt
diff --git a/Documentation/devicetree/bindings/spi/microchip,at91-usart-spi.txt
b/Documentation/devicetree/bindings/spi/microchip,at91-usart-spi.txt
new file mode 100644
index 000000000000..92d33ccdffae
--- /dev/null
+++ b/Documentation/devicetree/bindings/spi/microchip,at91-usart-spi.txt
@@ -0,0 +1,24 @@
+* Universal Synchronous Asynchronous Receiver/Transmitter (USART) in SPI mode
+
+Required properties:
+- #size-cells : Must be <0>
+- #address-cells : Must be <1>
+- compatible: Should be "microchip,at91sam9g45-usart-spi" or
"microchip,sama5d2-usart-spi"
+- reg: Should contain registers location and length
+- interrupts: Should contain interrupt
+- clocks: phandles to input clocks.
+- clock-names: tuple listing input clock names.
+ Required elements: "usart"
+- cs-gpios: chipselects (internal cs not supported)
+
+Example:
+ spi0: spi@f001c000 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "microchip,sama5d2-usart-spi",
"microchip,at91sam9g45-usart-spi";
+ reg = <0xf001c000 0x100>;
+ interrupts = <12 IRQ_TYPE_LEVEL_HIGH>;
+ clocks = <&usart0_clk>;
+ clock-names = "usart";
+ cs-gpios = <&pioB 3 0>;
+ };
--
2.17.0
