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Commit 7f310e5d authored by Andreas Klinger's avatar Andreas Klinger Committed by Jonathan Cameron
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iio: hx711: add clock-frequency property in DT 



Add clock-frequency property for hx711 ADC. This is the frequency of
PD_SCK.

After PD_SCK goes high DOUT is read just before PD_SCK goes down again.
This is necessary because of parasitic capacitance on the wiring.

Signed-off-by: default avatarAndreas Klinger <ak@it-klinger.de>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent 382fa581

Documentation/devicetree/bindings/iio/adc/avia-hx711.txt

+6 −0
Original line number Diff line number Diff line
@@ -8,11 +8,17 @@ Required properties: 
		See Documentation/devicetree/bindings/gpio/gpio.txt

 - avdd-supply:	Definition of the regulator used as analog supply



Optional properties:

 - clock-frequency:	Frequency of PD_SCK in Hz

			Minimum value allowed is 10 kHz because of maximum

			high time of 50 microseconds.



Example:

weight@0 {

	compatible = "avia,hx711";

	sck-gpios = <&gpio3 10 GPIO_ACTIVE_HIGH>;

	dout-gpios = <&gpio0 7 GPIO_ACTIVE_HIGH>;

	avdd-suppy = <&avdd>;

	clock-frequency = <100000>;

};