From mboxrd@z Thu Jan 1 00:00:00 1970 From: Anatolij Gustschin 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> References: <1487257860-31115-1-git-send-email-agust@denx.de> Return-path: In-Reply-To: <1487257860-31115-1-git-send-email-agust-ynQEQJNshbs@public.gmane.org> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: linux-fpga-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Cc: Alan Tull , Moritz Fischer , Rob Herring , Mark Rutland List-Id: devicetree@vger.kernel.org Add dt binding documentation details for Xilinx FPGA configuration over slave serial interface. Signed-off-by: Anatolij Gustschin --- .../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 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html