On Wed, Nov 25, 2015 at 04:10:25PM -0800, Andrew Duggan wrote: > Add devicetree binding for SPI devices. > > Signed-off-by: Andrew Duggan <aduggan@xxxxxxxxxxxxx> > --- > .../devicetree/bindings/input/rmi4/rmi_spi.txt | 57 ++++++++++++++++++++++ > drivers/input/rmi4/rmi_spi.c | 44 ++++++++++++++++- > 2 files changed, 100 insertions(+), 1 deletion(-) > create mode 100644 Documentation/devicetree/bindings/input/rmi4/rmi_spi.txt > > diff --git a/Documentation/devicetree/bindings/input/rmi4/rmi_spi.txt b/Documentation/devicetree/bindings/input/rmi4/rmi_spi.txt > new file mode 100644 > index 0000000..f20366b6 > --- /dev/null > +++ b/Documentation/devicetree/bindings/input/rmi4/rmi_spi.txt > @@ -0,0 +1,57 @@ > +Synaptics RMI4 SPI Device Binding > + > +The Synaptics RMI4 core is able to support RMI4 devices using differnet > +transports and differnet functions. This file describes the device tree > +bindings for devices using the SPI tranport driver. Complete documentation > +for other transports and functions cen be found ini > +Documentation/devicetree/bindings/input/rmi4. > + > +Required Properties: > +- compatible: syna,rmi-spi > +- reg: Chip select address for the device > +- #address-cells: Set to 1 to indicate that the function child nodes > + consist of only on uint32 value. > +- #size-cells: Set to 0 to indicate that the function child nodes do not > + have a size property. > + > +Optional Properties: > +- interrupts: interrupt which the rmi device is connected to. > +- interrupt-parent: The interrupt controller. > +See Documentation/devicetree/bindings/interrupt-controller/interrupts.txt > + > +- syna,spi-read-delay: millisecond delay between read byte transfers. > +- syna,spi-write-delay: millisecond delay between write byte transfers. These could possibly be common SPI properties, but they would need to be somewhat better defined as every access on SPI is a read and a write. What if you have a read then write or write then read? Just a time between transfers would probably make more sense. Minimally, they should have -msec suffix. Rob -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
