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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 v2 1/2] dt: bindings: fpga: add xilinx slave-serial binding description
Date: Mon, 20 Feb 2017 15:25:23 +0100	[thread overview]
Message-ID: <1487600724-17607-2-git-send-email-agust@denx.de> (raw)
In-Reply-To: <1487600724-17607-1-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>
---
Changes in v2:

 - correct gpios properties in example to match above description

 - use fpga-mgr@0 instead of fpga-spi@0 in example

 .../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..20b0731
--- /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-mgr@0 {
+		compatible = "xlnx,fpga-slave-serial";
+		spi-max-frequency = <60000000>;
+		spi-cpha;
+		reg = <0>;
+		done-gpios = <&gpio0 9 GPIO_ACTIVE_HIGH>;
+		prog_b-gpios = <&gpio0 29 GPIO_ACTIVE_LOW>;
+	};
-- 
2.7.4

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  parent reply	other threads:[~2017-02-20 14:25 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-02-20 14:25 [PATCH v2 0/2] Xilinx Slave Serial FPGA Manager Anatolij Gustschin
     [not found] ` <1487600724-17607-1-git-send-email-agust-ynQEQJNshbs@public.gmane.org>
2017-02-20 14:25   ` Anatolij Gustschin [this message]
     [not found]     ` <1487600724-17607-2-git-send-email-agust-ynQEQJNshbs@public.gmane.org>
2017-02-20 17:28       ` [PATCH v2 1/2] dt: bindings: fpga: add xilinx slave-serial binding description Moritz Fischer
2017-02-20 14:25   ` [PATCH v2 2/2] fpga manager: Add Xilinx slave serial SPI driver Anatolij Gustschin
     [not found]     ` <1487600724-17607-3-git-send-email-agust-ynQEQJNshbs@public.gmane.org>
2017-02-20 17:27       ` Moritz Fischer
     [not found]         ` <CAAtXAHeO_+6ZXP51nxFgyLYR9cjqLrqmoYEniqXmZudF=3uhFA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-02-20 20:05           ` Anatolij Gustschin
2017-02-20 20:05             ` Anatolij Gustschin
2017-02-21 14:01       ` Michal Simek
     [not found]         ` <2d412ae7-4163-9943-6d98-2d6387df7789-gjFFaj9aHVfQT0dZR+AlfA@public.gmane.org>
2017-02-21 14:24           ` Anatolij Gustschin
2017-02-21 14:51             ` Michal Simek
     [not found]               ` <19e0b5d1-bbf6-25ac-2698-6074ebafcf05-gjFFaj9aHVfQT0dZR+AlfA@public.gmane.org>
2017-02-21 15:17                 ` Anatolij Gustschin
2017-02-21 15:27                   ` Michal Simek
     [not found]                     ` <ce0d7ba7-fa05-ad55-407c-3903553ace65-gjFFaj9aHVfQT0dZR+AlfA@public.gmane.org>
2017-02-21 15:39                       ` Anatolij Gustschin
2017-02-21 18:53                         ` Michal Simek
     [not found]                           ` <3a30638c-68f6-8c2b-95b7-c8c700fe4867-gjFFaj9aHVfQT0dZR+AlfA@public.gmane.org>
2017-02-21 20:24                             ` Anatolij Gustschin

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