| Message ID | 20190307125251.724-3-marek.behun@nic.cz |
|---|---|
| State | New |
| Headers | show |
| Series | Add Moxtet bus and GPIO over Moxtet bus | expand |
On Thu, Mar 07, 2019 at 01:52:48PM +0100, Marek Behún wrote: > 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 <marek.behun@nic.cz> > Cc: Rob Herring <robh+dt@kernel.org> > Cc: devicetree@vger.kernel.org > --- > .../devicetree/bindings/bus/moxtet.txt | 44 +++++++++++++++++++ > MAINTAINERS | 1 + > 2 files changed, 45 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..7be9d00c1767 > --- /dev/null > +++ b/Documentation/devicetree/bindings/bus/moxtet.txt > @@ -0,0 +1,44 @@ > +Turris Mox module status and 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 > + - interrupts : Must contain reference to the shared interrupt line > + - interrupt-controller : Required > + - #interrupt-cells : Has to be 1 > + > +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 'position' is a little vague. > + > +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 { > + compatible = "cznic,moxtet"; > + #address-cells = <1>; > + #size-cells = <0>; > + reg = <1>; > + spi-max-frequency = <10000000>; > + spi-cpol; > + spi-cpha; > + interrupt-controller; > + #interrupt-cells = <1>; > + interrupt-parent = <&gpiosb>; > + interrupts = <5 IRQ_TYPE_EDGE_FALLING>; > + > + moxtet_sfp: gpio@0 { > + compatible = "cznic,moxtet-sfp"; cznic,moxtet-gpio according to the next patch. > + gpio-controller; > + #gpio-cells = <2>; > + reg = <0>; > + } > + }; > diff --git a/MAINTAINERS b/MAINTAINERS > index d96d36c83bc3..3f461a2d776a 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -1502,6 +1502,7 @@ ARM/CZ.NIC TURRIS MOX SUPPORT > M: Marek Behun <marek.behun@nic.cz> > W: http://mox.turris.cz > S: Maintained > +F: Documentation/devicetree/bindings/bus/moxtet.txt > F: include/linux/moxtet.h > F: drivers/bus/moxtet.c > > -- > 2.19.2 >
diff --git a/Documentation/devicetree/bindings/bus/moxtet.txt b/Documentation/devicetree/bindings/bus/moxtet.txt new file mode 100644 index 000000000000..7be9d00c1767 --- /dev/null +++ b/Documentation/devicetree/bindings/bus/moxtet.txt @@ -0,0 +1,44 @@ +Turris Mox module status and 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 + - interrupts : Must contain reference to the shared interrupt line + - interrupt-controller : Required + - #interrupt-cells : Has to be 1 + +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 { + compatible = "cznic,moxtet"; + #address-cells = <1>; + #size-cells = <0>; + reg = <1>; + spi-max-frequency = <10000000>; + spi-cpol; + spi-cpha; + interrupt-controller; + #interrupt-cells = <1>; + interrupt-parent = <&gpiosb>; + interrupts = <5 IRQ_TYPE_EDGE_FALLING>; + + moxtet_sfp: gpio@0 { + compatible = "cznic,moxtet-sfp"; + gpio-controller; + #gpio-cells = <2>; + reg = <0>; + } + }; diff --git a/MAINTAINERS b/MAINTAINERS index d96d36c83bc3..3f461a2d776a 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1502,6 +1502,7 @@ ARM/CZ.NIC TURRIS MOX SUPPORT M: Marek Behun <marek.behun@nic.cz> W: http://mox.turris.cz S: Maintained +F: Documentation/devicetree/bindings/bus/moxtet.txt F: include/linux/moxtet.h F: drivers/bus/moxtet.c
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 <marek.behun@nic.cz> Cc: Rob Herring <robh+dt@kernel.org> Cc: devicetree@vger.kernel.org --- .../devicetree/bindings/bus/moxtet.txt | 44 +++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 45 insertions(+) create mode 100644 Documentation/devicetree/bindings/bus/moxtet.txt