On Tue, Mar 26, 2019 at 7:31 AM Andreas Klinger <ak@xxxxxxxxxxxxx> wrote: > > use devantech-srf04.txt and transform binding into yaml I'd just collapse these into 1 patch. > > Signed-off-by: Andreas Klinger <ak@xxxxxxxxxxxxx> > --- > .../bindings/iio/proximity/devantech-srf04.yaml | 62 ++++++++++++++++++++++ > 1 file changed, 62 insertions(+) > create mode 100644 Documentation/devicetree/bindings/iio/proximity/devantech-srf04.yaml > > diff --git a/Documentation/devicetree/bindings/iio/proximity/devantech-srf04.yaml b/Documentation/devicetree/bindings/iio/proximity/devantech-srf04.yaml > new file mode 100644 > index 000000000000..cd065393b062 > --- /dev/null > +++ b/Documentation/devicetree/bindings/iio/proximity/devantech-srf04.yaml > @@ -0,0 +1,62 @@ > +# SPDX-License-Identifier: GPL-2.0 > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/iio/proximity/devantech-srf04.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Devantech SRF04 ultrasonic range finder > + > +maintainers: > + - Andreas Klinger <ak@xxxxxxxxxxxxx> > + > +description: | > + Bit-banging driver using two GPIOs: > + - trigger-gpio is raised by the driver to start sending out an ultrasonic > + burst > + - echo-gpio is held high by the sensor after sending ultrasonic burst > + until it is received once again > + > + Specifications about the driver can be found at: > + http://www.robot-electronics.co.uk/htm/srf04tech.htm > + > +allOf: > + - $ref: /schemas/i2c/i2c-controller.yaml# This doesn't belong. It's not a I2C bus controller. > + > +properties: > + compatible: > + items: > + - const: devantech,srf04 > + > + trig-gpios: > + description: > + Definition of the GPIO for the triggering (output) This GPIO is set > + for about 10 us by the driver to tell the device it should initiate > + the measurement cycle. > + maxItems: 1 > + > + echo-gpios: > + description: > + Definition of the GPIO for the echo (input) > + This GPIO is set by the device as soon as an ultrasonic burst is sent > + out and reset when the first echo is received. > + Thus this GPIO is set while the ultrasonic waves are doing one round > + trip. > + It needs to be an GPIO which is able to deliver an interrupt because > + the time between two interrupts is measured in the driver. > + See Documentation/devicetree/bindings/gpio/gpio.txt for information > + on how to specify a consumer gpio. > + maxItems: 1 > + > +required: > + - compatible > + - trig-gpios > + - echo-gpios > + > +examples: > + - | > + #include <dt-bindings/gpio/gpio.h> > + proximity { > + compatible = "devantech,srf04"; > + trig-gpios = <&gpio1 15 GPIO_ACTIVE_HIGH>; > + echo-gpios = <&gpio2 6 GPIO_ACTIVE_HIGH>; > + }; > -- > 2.11.0
