2019-11-18 07:38:25

by Andreas Klinger

Subject: [PATCH v3 2/4] dt-bindings: add parallax ping sensors

Add dt-bindings for parallax PING))) and LaserPING iio sensors, which
are used for measuring distances.

Signed-off-by: Andreas Klinger <[email protected]>
Reviewed-by: Rob Herring <[email protected]>
---
.../bindings/iio/proximity/parallax-ping.yaml | 51 ++++++++++++++++++++++
1 file changed, 51 insertions(+)
create mode 100644 Documentation/devicetree/bindings/iio/proximity/parallax-ping.yaml

diff --git a/Documentation/devicetree/bindings/iio/proximity/parallax-ping.yaml b/Documentation/devicetree/bindings/iio/proximity/parallax-ping.yaml
new file mode 100644
index 000000000000..a079c9921af6
--- /dev/null
+++ b/Documentation/devicetree/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 <[email protected]>
+
+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>;
+ };
--
2.11.0

2019-11-23 14:39:13

by Jonathan Cameron

Subject: Re: [PATCH v3 2/4] dt-bindings: add parallax ping sensors

On Mon, 18 Nov 2019 08:36:12 +0100
Andreas Klinger <[email protected]> wrote:

> Add dt-bindings for parallax PING))) and LaserPING iio sensors, which
> are used for measuring distances.
>
> Signed-off-by: Andreas Klinger <[email protected]>
> Reviewed-by: Rob Herring <[email protected]>
Applied to the togreg branch of iio.git and pushed out as testing.

Thanks,

Jonathan

> ---
> .../bindings/iio/proximity/parallax-ping.yaml | 51 ++++++++++++++++++++++
> 1 file changed, 51 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/iio/proximity/parallax-ping.yaml
>
> diff --git a/Documentation/devicetree/bindings/iio/proximity/parallax-ping.yaml b/Documentation/devicetree/bindings/iio/proximity/parallax-ping.yaml
> new file mode 100644
> index 000000000000..a079c9921af6
> --- /dev/null
> +++ b/Documentation/devicetree/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 <[email protected]>
> +
> +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>;
> + };