[PATCH v3 3/4] DT: Add binding for Altera FPGAs in passive-serial mode
From: Steffen Trumtrar <hidden>
Date: 2014-09-04 13:47:16
Also in:
barebox
Subsystem:
open firmware and flattened device tree bindings, the rest · Maintainers:
Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
From: Sascha Hauer <redacted> Altera FPGAs that are programmed via SPI use the passive serial protocol. Add a simple binding that describes the setup for this usecase. Cc: devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Signed-off-by: Sascha Hauer <redacted> Signed-off-by: Steffen Trumtrar <redacted> --- .../devicetree/bindings/firmware/altr,passive-serial.txt | 13 +++++++++++++ 1 file changed, 13 insertions(+) create mode 100644 Documentation/devicetree/bindings/firmware/altr,passive-serial.txt
diff --git a/Documentation/devicetree/bindings/firmware/altr,passive-serial.txt b/Documentation/devicetree/bindings/firmware/altr,passive-serial.txt
new file mode 100644
index 000000000000..1305901a4dd5
--- /dev/null
+++ b/Documentation/devicetree/bindings/firmware/altr,passive-serial.txt@@ -0,0 +1,13 @@ +Altera FPGAs in passive serial mode +----------------------------------- + +This binding defines the control interface to Altera FPGAs in +passive serial mode. This is used to upload the firmware and +to start the FPGA. + +Required properties: +- compatible: shall be "altr,fpga-passive-serial" +- reg: SPI chip select +- nstat-gpio: Specify GPIO for controlling the nstat pin +- confd-gpio: Specify GPIO for controlling the confd pin +- nconfig-gpio: Specify GPIO for controlling the nconfig pin + +Example: + + fpga@0 { + compatible = "altr,fpga-passive-serial"; + nstat-gpios = <&gpio4 18 0>; + confd-gpios = <&gpio4 19 0>; + nconfig-gpios = <&gpio4 20 0>; + spi-max-frequency = <10000000>; + reg = <0>; + };
--
2.1.0
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