From: Sascha Hauer <[email protected]> Altera FPGAs that are programmed via SPI use the passive serial protocol. Add a simple binding that describes the setup for this usecase.
Cc: [email protected] Signed-off-by: Sascha Hauer <[email protected]> Signed-off-by: Steffen Trumtrar <[email protected]> --- .../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 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
