[v3,1/3] iio: hx711: add avia,data-ready-delay-ns property in DT

Commit Message

Andreas Klinger July 3, 2018, 12:49 p.m. UTC

add avia,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 <[e-mail]>
---
 Documentation/devicetree/bindings/iio/adc/avia-hx711.txt | 7 +++++++
 1 file changed, 7 insertions(+)

Patch

diff --git a/Documentation/devicetree/bindings/iio/adc/avia-hx711.txt b/Documentation/devicetree/bindings/iio/adc/avia-hx711.txt
index b3629405f568..669d213e2964 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:
+ - avia,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>;
+	avia,data-ready-delay-ns = <1000>;
 };