Messages in this thread Patch in this message |  | | From | Piyush Patle <> | | Subject | [PATCH v11 01/11] dt-bindings: iio: adc: hx711: clean up existing binding text | | Date | Thu, 4 Jun 2026 00:18:49 +0530 |
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Rewrite the binding description and property text so it describes the existing HX711 hardware behavior directly instead of documenting old driver implementation details.
Also clarify that clock-frequency controls the SCK bit-bang timing.
No functional change.
Signed-off-by: Piyush Patle <piyushpatle228@gmail.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Acked-by: Conor Dooley <conor.dooley@microchip.com> --- .../bindings/iio/adc/avia-hx711.yaml | 25 ++++++++----------- 1 file changed, 10 insertions(+), 15 deletions(-)
diff --git a/Documentation/devicetree/bindings/iio/adc/avia-hx711.yaml b/Documentation/devicetree/bindings/iio/adc/avia-hx711.yaml index 9c57eb13f892..1ea60dff98d5 100644 --- a/Documentation/devicetree/bindings/iio/adc/avia-hx711.yaml +++ b/Documentation/devicetree/bindings/iio/adc/avia-hx711.yaml @@ -10,14 +10,9 @@ maintainers: - Andreas Klinger <ak@it-klinger.de> description: | - Bit-banging driver using two GPIOs: - - sck-gpio gives a clock to the sensor with 24 cycles for data retrieval - and up to 3 cycles for selection of the input channel and gain for the - next measurement - - dout-gpio is the sensor data the sensor responds to the clock - - Specifications about the driver can be found at: - http://www.aviaic.com/ENProducts.aspx + The HX711 is a 24-bit ADC with selectable gain (32/64/128) and two + differential input channels. Channel A supports gain 64 and 128; + channel B supports gain 32. properties: compatible: @@ -26,23 +21,23 @@ properties: sck-gpios: description: - Definition of the GPIO for the clock (output). In the datasheet it is - named PD_SCK + GPIO for the clock output (PD_SCK in the datasheet). maxItems: 1 dout-gpios: description: - Definition of the GPIO for the data-out sent by the sensor in - response to the clock (input). - See Documentation/devicetree/bindings/gpio/gpio.txt for information - on how to specify a consumer gpio. + GPIO for the data output from the sensor (DOUT in the datasheet). maxItems: 1 avdd-supply: description: - Definition of the regulator used as analog supply + Analog supply voltage (AVDD). clock-frequency: + description: + Controls the SCK bit-bang timing. The value is used to derive the + delay between SCK edges; keep the SCK high time below 60 us to + avoid triggering chip power-down mode. minimum: 20000 maximum: 2500000 default: 400000 -- 2.43.0
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