From: Alan Tull <atull@kernel.org> To: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Moritz Fischer <moritz.fischer@ettus.com>, Alan Tull <atull@kernel.org>, linux-kernel@vger.kernel.org, linux-fpga@vger.kernel.org, Joel Holdsworth <joel@airwebreathe.org.uk> Subject: [PATCH 4/5] Documentation: Add binding document for Lattice iCE40 FPGA manager Date: Mon, 27 Feb 2017 16:14:25 -0600 [thread overview] Message-ID: <20170227221426.4176-5-atull@kernel.org> (raw) In-Reply-To: <20170227221426.4176-1-atull@kernel.org> From: Joel Holdsworth <joel@airwebreathe.org.uk> This adds documentation of the device tree bindings of the Lattice iCE40 FPGA driver for the FPGA manager framework. Signed-off-by: Joel Holdsworth <joel@airwebreathe.org.uk> Acked-by: Rob Herring <robh@kernel.org> Acked-by: Alan Tull <atull@opensource.altera.com> Acked-by: Moritz Fischer <moritz.fischer@ettus.com> Acked-by: Marek Vasut <marex@denx.de> --- .../bindings/fpga/lattice-ice40-fpga-mgr.txt | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) create mode 100644 Documentation/devicetree/bindings/fpga/lattice-ice40-fpga-mgr.txt diff --git a/Documentation/devicetree/bindings/fpga/lattice-ice40-fpga-mgr.txt b/Documentation/devicetree/bindings/fpga/lattice-ice40-fpga-mgr.txt new file mode 100644 index 0000000..4dc4124 --- /dev/null +++ b/Documentation/devicetree/bindings/fpga/lattice-ice40-fpga-mgr.txt @@ -0,0 +1,21 @@ +Lattice iCE40 FPGA Manager + +Required properties: +- compatible: Should contain "lattice,ice40-fpga-mgr" +- reg: SPI chip select +- spi-max-frequency: Maximum SPI frequency (>=1000000, <=25000000) +- cdone-gpios: GPIO input connected to CDONE pin +- reset-gpios: Active-low GPIO output connected to CRESET_B pin. Note + that unless the GPIO is held low during startup, the + FPGA will enter Master SPI mode and drive SCK with a + clock signal potentially jamming other devices on the + bus until the firmware is loaded. + +Example: + fpga: fpga@0 { + compatible = "lattice,ice40-fpga-mgr"; + reg = <0>; + spi-max-frequency = <1000000>; + cdone-gpios = <&gpio 24 GPIO_ACTIVE_HIGH>; + reset-gpios = <&gpio 22 GPIO_ACTIVE_LOW>; + }; -- 2.7.4
next prev parent reply other threads:[~2017-02-27 22:15 UTC|newest] Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top 2017-02-27 22:14 [PATCH 0/5] fpga: ts73xx and iCE40 support Alan Tull 2017-02-27 22:14 ` [PATCH 1/5] FPGA: Add TS-7300 FPGA manager Alan Tull 2017-03-15 2:24 ` Florian Fainelli 2017-03-15 16:45 ` Alan Tull 2017-02-27 22:14 ` [PATCH 2/5] ARM: ep93xx: Register ts73xx-fpga manager driver for TS-7300 Alan Tull 2017-02-27 22:14 ` [PATCH 3/5] of: Add vendor prefix for Lattice Semiconductor Alan Tull 2017-02-27 22:14 ` Alan Tull [this message] 2017-02-27 22:14 ` [PATCH 5/5] fpga: Add support for Lattice iCE40 FPGAs Alan Tull
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