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author | Sascha Hauer <s.hauer@pengutronix.de> | 2020-02-14 09:05:53 +0100 |
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committer | Sascha Hauer <s.hauer@pengutronix.de> | 2020-02-18 08:32:25 +0100 |
commit | 81ce4a7dec8ba066c73692e10634091b14c1e494 (patch) | |
tree | d61574b25fda47711e3efab57c7a5739de477565 /dts/Bindings/iio/proximity | |
parent | 84b7f86bef670f6751d67131738555fa53ca3f6b (diff) | |
download | barebox-81ce4a7dec8ba066c73692e10634091b14c1e494.tar.gz barebox-81ce4a7dec8ba066c73692e10634091b14c1e494.tar.xz |
dts: update to v5.6-rc1
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'dts/Bindings/iio/proximity')
-rw-r--r-- | dts/Bindings/iio/proximity/parallax-ping.yaml | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/dts/Bindings/iio/proximity/parallax-ping.yaml b/dts/Bindings/iio/proximity/parallax-ping.yaml new file mode 100644 index 0000000000..a079c9921a --- /dev/null +++ b/dts/Bindings/iio/proximity/parallax-ping.yaml @@ -0,0 +1,51 @@ +# SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/iio/proximity/parallax-ping.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Parallax PING))) and LaserPING range finder + +maintainers: + - Andreas Klinger <ak@it-klinger.de> + +description: | + Bit-banging driver using one GPIO: + - ping-gpios is raised by the driver to start measurement + - direction of ping-gpio is then switched into input with an interrupt + for receiving distance value as PWM signal + + Specifications about the devices can be found at: + http://parallax.com/sites/default/files/downloads/28041-LaserPING-2m-Rangefinder-Guide.pdf + http://parallax.com/sites/default/files/downloads/28015-PING-Documentation-v1.6.pdf + +properties: + compatible: + enum: + - parallax,ping + - parallax,laserping + + ping-gpios: + description: + Definition of the GPIO for the triggering and echo (output and input) + This GPIO is set for about 5 us by the driver to tell the device it + should initiate the measurement cycle. Afterwards the GPIO is switched + to input direction with an interrupt. The device sets it and the + length of the input signal corresponds to the measured distance. + 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 + - ping-gpios + +examples: + - | + #include <dt-bindings/gpio/gpio.h> + proximity { + compatible = "parallax,laserping"; + ping-gpios = <&gpio0 26 GPIO_ACTIVE_HIGH>; + }; |