[PATCH v2 1/2] dt: bindings: fpga: add xilinx slave-serial binding description
From: Anatolij Gustschin <hidden>
Date: 2017-02-20 14:25:23
Subsystem:
fpga manager framework, open firmware and flattened device tree bindings, the rest · Maintainers:
Moritz Fischer, Xu Yilun, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
Possibly related (same subject, not in this thread)
- 2017-02-20 · Re: [PATCH v2 1/2] dt: bindings: fpga: add xilinx slave-serial binding description · Moritz Fischer <hidden>
Add dt binding documentation details for Xilinx FPGA configuration over slave serial interface. Signed-off-by: Anatolij Gustschin <redacted> --- 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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