linux-kernel - [RFC 1/2] This is the documentation of the device tree bindings for the Cadence QSPI Flash Controller driver.

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Message-ID: <1414175661-9249-2-git-send-email-grmoore@opensource.altera.com>
Date:	Fri, 24 Oct 2014 13:34:20 -0500
From:	Graham Moore <grmoore@...nsource.altera.com>
To:	<linux-mtd@...ts.infradead.org>
CC:	David Woodhouse <dwmw2@...radead.org>,
	Brian Norris <computersforpeace@...il.com>,
	<linux-kernel@...r.kernel.org>,
	Alan Tull <atull@...nsource.altera.com>,
	Dinh Nguyen <dinguyen@...nsource.altera.com>,
	Yves Vandervennet <yvanderv@...nsource.altera.com>,
	Graham Moore <grmoore@...nsource.altera.com>
Subject: [RFC 1/2] This is the documentation of the device tree bindings for the Cadence QSPI Flash Controller driver.

Signed-off-by: Graham Moore <grmoore@...nsource.altera.com>
---
 .../devicetree/bindings/mtd/cadence_quadspi.txt    |   30 ++++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mtd/cadence_quadspi.txt

diff --git a/Documentation/devicetree/bindings/mtd/cadence_quadspi.txt b/Documentation/devicetree/bindings/mtd/cadence_quadspi.txt
new file mode 100644
index 0000000..0064fc3
--- /dev/null
+++ b/Documentation/devicetree/bindings/mtd/cadence_quadspi.txt
@@ -0,0 +1,30 @@
+* Cadence Quad SPI controller
+
+Required properties:
+- compatible : Should be "cdns,qspi-nor".
+- reg : Contains two entries, each of which is a tuple consisting of a
+	physical address and length.  The first entry is the address and
+	length of the controller register set.  The second entry is the
+	address and length of the QSPI Controller data area.
+- interrupts : Unit interrupt specifier for the controller interrupt.
+- ext-decoder : Value of 0 means no external chipselect decoder is
+	connected, 1 means there is an external chipselect decoder connected.
+- num-chipselect : Number of chip select lines.
+- fifo-depth : Size of the data FIFO in words.
+- bus-num : Number of the SPI bus to which the controller is connected.
+
+Example:
+
+	qspi: spi@...05000 {
+		compatible = "cdns,qspi-nor";
+		#address-cells = <1>;
+		#size-cells = <0>;
+		reg = <0xff705000 0x1000>,
+			<0xffa00000 0x1000>;
+		interrupts = <0 151 4>;
+		clocks = <&qspi_clk>;
+		ext-decoder = <0>;
+		num-chipselect = <4>;
+		fifo-depth = <128>;
+		bus-num = <2>;
+	}
-- 
1.7.9.5

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