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From: Anatolij Gustschin <agust-ynQEQJNshbs@public.gmane.org>
To: linux-fpga-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Cc: Alan Tull
	<atull-yzvPICuk2ABMcg4IHK0kFoH6Mc4MB0Vx@public.gmane.org>,
	Moritz Fischer
	<moritz.fischer-+aYTwkv1SeIAvxtiuMwx3w@public.gmane.org>,
	Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
	Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>
Subject: [PATCH 1/2] dt: bindings: fpga: add xilinx slave-serial binding description
Date: Thu, 16 Feb 2017 16:10:59 +0100
Message-ID: <1487257860-31115-2-git-send-email-agust@denx.de> (raw)
In-Reply-To: <1487257860-31115-1-git-send-email-agust-ynQEQJNshbs@public.gmane.org>

Add dt binding documentation details for Xilinx FPGA configuration
over slave serial interface.

Signed-off-by: Anatolij Gustschin <agust-ynQEQJNshbs@public.gmane.org>
---
 .../bindings/fpga/xilinx-slave-serial.txt          | 24 ++++++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/fpga/xilinx-slave-serial.txt

diff --git a/Documentation/devicetree/bindings/fpga/xilinx-slave-serial.txt b/Documentation/devicetree/bindings/fpga/xilinx-slave-serial.txt
new file mode 100644
index 0000000..b5fa6a6
--- /dev/null
+++ b/Documentation/devicetree/bindings/fpga/xilinx-slave-serial.txt
@@ -0,0 +1,24 @@
+Xilinx Slave Serial SPI FPGA Manager
+
+Xilinx Spartan-6 FPGAs support a method of loading the bitstream over
+what is referred to as "slave serial" interface.
+The slave 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.xilinx.com/support/documentation/user_guides/ug380.pdf
+
+Required properties:
+- compatible: should contain "xlnx,fpga-slave-serial"
+- reg: spi chip select of the FPGA
+- prog_b-gpios: config pin (referred to as PROGRAM_B in the manual)
+- done-gpios: config status pin (referred to as DONE in the manual)
+
+Example:
+	fpga_mgr_spi: fpga-spi@0 {
+		compatible = "xlnx,fpga-slave-serial";
+		spi-max-frequency = <60000000>;
+		spi-cpha;
+		reg = <0>;
+		done-gpio = <&gpio0 9 GPIO_ACTIVE_HIGH>;
+		prog_b-gpio = <&gpio0 29 GPIO_ACTIVE_LOW>;
+	};
-- 
1.9.1

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  parent reply index

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-02-16 15:10 [PATCH 0/2] Xilinx Slave Serial FPGA Manager Anatolij Gustschin
     [not found] ` <1487257860-31115-1-git-send-email-agust-ynQEQJNshbs@public.gmane.org>
2017-02-16 15:10   ` Anatolij Gustschin [this message]
     [not found]     ` <1487257860-31115-2-git-send-email-agust-ynQEQJNshbs@public.gmane.org>
2017-02-16 17:24       ` [PATCH 1/2] dt: bindings: fpga: add xilinx slave-serial binding description Joshua Clayton
     [not found]         ` <a2403d1f-cb82-70ce-ecff-45e5901dabc2-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-02-16 18:51           ` Anatolij Gustschin
2017-02-16 17:36       ` Moritz Fischer
     [not found]         ` <CAAtXAHcpcwax-rH3quYF9QTOVfbTyxmpPLLbUyX=-aruQfADDA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-02-16 18:54           ` Anatolij Gustschin
2017-02-16 15:11   ` [PATCH 2/2] fpga manager: Add Xilinx slave serial SPI driver Anatolij Gustschin
     [not found]     ` <1487257860-31115-3-git-send-email-agust-ynQEQJNshbs@public.gmane.org>
2017-02-21 16:49       ` Alan Tull

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