[PATCH v2 1/2] iio: distance: add dt binding for devantech-srf04
DORMANTno replies
From: Andreas Klinger <ak@it-klinger.de>
Date: 2017-01-30 12:51:55
Also in:
linux-iio, lkml
Subsystem:
iio subsystem and drivers, open firmware and flattened device tree bindings, the rest · Maintainers:
Jonathan Cameron, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
This patch adds dt binding for devantech ultrasonic ranger srf04.
The vendor "devantech" was already added to the vendor list with
"[PATCH v4 1/3] iio: distance: srf08: add trivial DT binding"
Signed-off-by: Andreas Klinger <ak@it-klinger.de>
---
.../bindings/iio/proximity/devantech-srf04.txt | 28 ++++++++++++++++++++++
1 file changed, 28 insertions(+)
create mode 100644 Documentation/devicetree/bindings/iio/proximity/devantech-srf04.txt
diff --git a/Documentation/devicetree/bindings/iio/proximity/devantech-srf04.txt b/Documentation/devicetree/bindings/iio/proximity/devantech-srf04.txt
new file mode 100644
index 000000000000..d4dc7a227e2e
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/proximity/devantech-srf04.txt@@ -0,0 +1,28 @@ +* Devantech SRF04 ultrasonic range finder + Bit-banging driver using two GPIOs + +Required properties: + - compatible: Should be "devantech,srf04" + + - trig-gpios: 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. + + - echo-gpios: 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. + +Example: +srf04@0 { + compatible = "devantech,srf04"; + trig-gpios = <&gpio1 15 GPIO_ACTIVE_HIGH>; + echo-gpios = <&gpio2 6 GPIO_ACTIVE_HIGH>; +};
--
2.1.4