From b4b7ff4b08e691656c9d77c758fc355833128ac0 Mon Sep 17 00:00:00 2001
From: André Fabian Silva Delgado <emulatorman@parabola.nu>
Date: Wed, 20 Jan 2016 14:01:31 -0300
Subject: Linux-libre 4.4-gnu

---
 .../devicetree/bindings/mfd/atmel-flexcom.txt      | 63 ++++++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/atmel-flexcom.txt

(limited to 'Documentation/devicetree/bindings/mfd/atmel-flexcom.txt')

diff --git a/Documentation/devicetree/bindings/mfd/atmel-flexcom.txt b/Documentation/devicetree/bindings/mfd/atmel-flexcom.txt
new file mode 100644
index 000000000..692300117
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/atmel-flexcom.txt
@@ -0,0 +1,63 @@
+* Device tree bindings for Atmel Flexcom (Flexible Serial Communication Unit)
+
+The Atmel Flexcom is just a wrapper which embeds a SPI controller, an I2C
+controller and an USART. Only one function can be used at a time and is chosen
+at boot time according to the device tree.
+
+Required properties:
+- compatible:		Should be "atmel,sama5d2-flexcom"
+- reg:			Should be the offset/length value for Flexcom dedicated
+			I/O registers (without USART, TWI or SPI registers).
+- clocks:		Should be the Flexcom peripheral clock from PMC.
+- #address-cells:	Should be <1>
+- #size-cells:		Should be <1>
+- ranges:		Should be one range for the full I/O register region
+			(including USART, TWI and SPI registers).
+- atmel,flexcom-mode:	Should be one of the following values:
+			- <1> for USART
+			- <2> for SPI
+			- <3> for I2C
+
+Required child:
+A single available child device of type matching the "atmel,flexcom-mode"
+property.
+
+The phandle provided by the clocks property of the child is the same as one for
+the Flexcom parent.
+
+For other properties, please refer to the documentations of the respective
+device:
+- ../serial/atmel-usart.txt
+- ../spi/spi_atmel.txt
+- ../i2c/i2c-at91.txt
+
+Example:
+
+flexcom@f8034000 {
+	compatible = "atmel,sama5d2-flexcom";
+	reg = <0xf8034000 0x200>;
+	clocks = <&flx0_clk>;
+	#address-cells = <1>;
+	#size-cells = <1>;
+	ranges = <0x0 0xf8034000 0x800>;
+	atmel,flexcom-mode = <2>;
+
+	spi@400 {
+		compatible = "atmel,at91rm9200-spi";
+		reg = <0x400 0x200>;
+		interrupts = <19 IRQ_TYPE_LEVEL_HIGH 7>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_flx0_default>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+		clocks = <&flx0_clk>;
+		clock-names = "spi_clk";
+		atmel,fifo-size = <32>;
+
+		mtd_dataflash@0 {
+			compatible = "atmel,at25f512b";
+			reg = <0>;
+			spi-max-frequency = <20000000>;
+		};
+	};
+};
-- 
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