[PATCH v2 1/4] iio: hx711: add data-ready-delay-ns property in DT

Andreas Klinger
2018-06-25T15:18:02Z

add data-ready-delay-ns property for hx711 ADC
this is the delay after rising PD_SCK until DOUT is read and assumed to be
ready

Signed-off-by: Andreas Klinger <ak@it-klinger.de>
---
Documentation/devicetree/bindings/iio/adc/avia-hx711.txt | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/iio/adc/avia-hx711.txt b/Documentation/devicetree/bindings/iio/adc/avia-hx711.txt
index b3629405f568..d0c066e3df69 100644
--- a/Documentation/devicetree/bindings/iio/adc/avia-hx711.txt
+++ b/Documentation/devicetree/bindings/iio/adc/avia-hx711.txt
@@ -8,11 +8,18 @@ Required properties:
See Documentation/devicetree/bindings/gpio/gpio.txt
- avdd-supply: Definition of the regulator used as analog supply

+Optional properties:
+ - data-ready-delay-ns: additional delay in nanoseconds between rising of
+ PD_SCK until DOUT is ready
+ should be less then maximum PD_SCK high time which
+ is 50000 in the datasheet
+
Example:
weight@0 {
compatible = "avia,hx711";
sck-gpios = <&gpio3 10 GPIO_ACTIVE_HIGH>;
dout-gpios = <&gpio0 7 GPIO_ACTIVE_HIGH>;
avdd-suppy = <&avdd>;
+ data-ready-delay-ns = <1000>;
};

--
2.1.4