[PATCH v3 bus+gpio 2/5] dt-bindings: bus: Document moxtet bus binding
STALE2775d
From: Marek Behún <hidden>
Date: 2019-03-01 03:59:41
Also in:
linux-gpio, lkml
Subsystem:
open firmware and flattened device tree bindings, the rest · Maintainers:
Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
Revision v3 of 2 in this series.
Revisions (2)
- v3 current
- v4 [diff vs current]
This adds device tree binding documentation for the Moxtet bus, a bus via which the different modules connected to the Turris Mox router can be configured. Signed-off-by: Marek Behún <redacted> Cc: Rob Herring <robh+dt@kernel.org> Cc: devicetree@vger.kernel.org --- .../devicetree/bindings/bus/moxtet.txt | 36 +++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 Documentation/devicetree/bindings/bus/moxtet.txt
diff --git a/Documentation/devicetree/bindings/bus/moxtet.txt b/Documentation/devicetree/bindings/bus/moxtet.txt
new file mode 100644
index 000000000000..2bb998cbd3ad
--- /dev/null
+++ b/Documentation/devicetree/bindings/bus/moxtet.txt@@ -0,0 +1,36 @@ +Turris Mox module configuration bus (over SPI) + +Required properties: + - compatible : Should be "cznic,moxtet". + - #address-cells : Has to be 1 + - #size-cells : Has to be 0 + - spi-cpol : Required inverted clock polarity + - spi-cpha : Required shifted clock phase +For other required and optional properties of SPI slave nodes please refer to +../spi/spi-bus.txt. + +Required properties of subnodes: + - reg : Should be position on the Moxtet bus + +The driver finds the devices connected to the bus by itself, but it may be +needed to reference some of them from other parts of the device tree. In that +case the devices can be defined as subnodes of the moxtet node. + +Example: + + moxtet@1 { + #address-cells = <1>; + #size-cells = <0>; + compatible = "cznic,moxtet"; + reg = <1>; + spi-max-frequency = <10000000>; + spi-cpol; + spi-cpha; + + moxtet_sfp: gpio@0 { + compatible = "cznic,moxtet-sfp"; + gpio-controller; + #gpio-cells = <2>; + reg = <0>; + } + };
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2.19.2