From mboxrd@z Thu Jan 1 00:00:00 1970 From: Steffen Trumtrar Subject: [PATCH v3 3/4] DT: Add binding for Altera FPGAs in passive-serial mode Date: Thu, 4 Sep 2014 15:47:16 +0200 Message-ID: <1409838437-3625-4-git-send-email-s.trumtrar@pengutronix.de> References: <1409838437-3625-1-git-send-email-s.trumtrar@pengutronix.de> Return-path: In-Reply-To: <1409838437-3625-1-git-send-email-s.trumtrar-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: barebox-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org Cc: Sascha Hauer , devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Steffen Trumtrar List-Id: devicetree@vger.kernel.org From: Sascha Hauer 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 Signed-off-by: Steffen Trumtrar --- .../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 majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html