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| author | Andreas Klinger <ak@it-klinger.de> | 2018-07-10 20:18:31 +0200 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2018-07-15 10:36:05 +0200 |
| commit | 7f310e5d07112e0bae57ce63de954e6773a26f81 (patch) | |
| tree | 65f27aa66d6be7f77b722288ae46e518ad617aa6 | |
| parent | iio: accel: adxl345: add sampling frequency support (diff) | |
| download | linux-7f310e5d07112e0bae57ce63de954e6773a26f81.tar.xz linux-7f310e5d07112e0bae57ce63de954e6773a26f81.zip | |
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 <ak@it-klinger.de>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
| -rw-r--r-- | Documentation/devicetree/bindings/iio/adc/avia-hx711.txt | 6 |
1 files changed, 6 insertions, 0 deletions
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>; }; |