From mboxrd@z Thu Jan 1 00:00:00 1970 From: radu.pirea@microchip.com (Radu Pirea) Date: Fri, 4 May 2018 18:47:12 +0300 Subject: [PATCH v2 4/6] dt-bindings: add binding for at91-usart in spi mode In-Reply-To: <20180504154714.5109-1-radu.pirea@microchip.com> References: <20180504154714.5109-1-radu.pirea@microchip.com> Message-ID: <20180504154714.5109-5-radu.pirea@microchip.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 --- .../bindings/spi/microchip,at91-usart-spi.txt | 28 +++++++++++++++++++ 1 file changed, 28 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..b68a3bec4121 --- /dev/null +++ b/Documentation/devicetree/bindings/spi/microchip,at91-usart-spi.txt @@ -0,0 +1,28 @@ +* Universal Synchronous Asynchronous Receiver/Transmitter (USART) in SPI mode + +Required properties: +- #size-cells : Must be <0> +- #address-cells : Must be <1> +- compatible: Should be "atmel,at91rm9200-usart" or "atmel,at91sam9260-usart" +- 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) +- at91,usart-mode: AT91_USART_MODE_SPI (found in dt-bindings/mfd/at91-usart.h) + +Example: + #include + + spi0: spi at f001c000 { + #address-cells = <1>; + #size-cells = <0>; + compatible = "atmel,at91rm9200-usart", "atmel,at91sam9260-usart"; + at91,usart-mode = ; + reg = <0xf001c000 0x100>; + interrupts = <12 IRQ_TYPE_LEVEL_HIGH>; + clocks = <&usart0_clk>; + clock-names = "usart"; + cs-gpios = <&pioB 3 0>; + }; -- 2.17.0