[PATCH 2/3] doc: dt: add cyclone-spi binding document

From	Joshua Clayton <stillcompiling@gmail.com>
Newsgroups	linux.kernel
Subject	[PATCH 2/3] doc: dt: add cyclone-spi binding document
Date	2016-10-06 22:40 +0200
Message-ID	<spnCq-5Wo-3@gated-at.bofh.it> (permalink)
References	<spnCq-5Wo-5@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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Describe a cyclonespi devicetree entry, required features

Signed-off-by: Joshua Clayton <stillcompiling@gmail.com>
---
 .../bindings/fpga/cyclone-spi-fpga-mgr.txt         | 23 ++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/fpga/cyclone-spi-fpga-mgr.txt

diff --git a/Documentation/devicetree/bindings/fpga/cyclone-spi-fpga-mgr.txt b/Documentation/devicetree/bindings/fpga/cyclone-spi-fpga-mgr.txt
new file mode 100644
index 0000000..8de34db
--- /dev/null
+++ b/Documentation/devicetree/bindings/fpga/cyclone-spi-fpga-mgr.txt
@@ -0,0 +1,23 @@
+Altera SOCFPGA FPGA Manager
+
+Altera cyclone FPGAs support a method of loading the bitstream over what is
+referred to as "passive serial".
+The passive serial link is not technically spi, and might require extra
+circuits in order to play nicely with other spi slaves on the same bus.
+
+See https://www.altera.com/literature/hb/cyc/cyc_c51013.pdf
+
+Required properties:
+- compatible  : should contain "altr,cyclonespi-fpga-mgr"
+- reg         : spi slave id of the fpga
+- reset-gpio  : reset pin (referred to as nCONFIG in the cyclone manual)
+- status-gpio : status pin (referred to as nSTATUS in the cyclone manual)
+
+Example:
+	fpga_spi: evi-fpga-spi@0 {
+		compatible = "altr,cyclonespi-fpga-mgr";
+		spi-max-frequency = <20000000>;
+		reg = <0>;
+		reset-gpio = <&gpio4 9 GPIO_ACTIVE_HIGH>;
+		status-gpio = <&gpio4 11 GPIO_ACTIVE_HIGH>;
+	};
-- 
2.7.4

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[PATCH 2/3] doc: dt: add cyclone-spi binding document Joshua Clayton <stillcompiling@gmail.com> - 2016-10-06 22:40 +0200
  Re: [PATCH 2/3] doc: dt: add cyclone-spi binding document Moritz Fischer <moritz.fischer@ettus.com> - 2016-10-07 05:00 +0200
    Re: [PATCH 2/3] doc: dt: add cyclone-spi binding document Joshua Clayton <stillcompiling@gmail.com> - 2016-10-07 22:50 +0200

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