From: Andreas Klinger Date: Tue, 10 Jul 2018 18:18:31 +0000 (+0200) Subject: iio: hx711: add clock-frequency property in DT X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=7f310e5d07112e0bae57ce63de954e6773a26f81;p=openwrt%2Fstaging%2Fblogic.git 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: Andreas Klinger Reviewed-by: Rob Herring Signed-off-by: Jonathan Cameron --- diff --git a/Documentation/devicetree/bindings/iio/adc/avia-hx711.txt b/Documentation/devicetree/bindings/iio/adc/avia-hx711.txt index b3629405f568..2c1b67d33c49 100644 --- a/Documentation/devicetree/bindings/iio/adc/avia-hx711.txt +++ b/Documentation/devicetree/bindings/iio/adc/avia-hx711.txt @@ -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>; };