From: Andre Werner <andre.werner@xxxxxxxxxxxxxxxxxxxxx> Add basic description for ADS7038 ADC devices. The devicetree adds the following device specific options: - average-samples: Program device's programmable average filter. - crc-enabled: Enable the CRC check for SPI transfers. Sadly, this option has currently no effect in the driver. - status-enabled: Enable the appending of the device's status on the measure value transmission. - gpio-controller: Sadly function not implemented yet in the driver. Signed-off-by: Andre Werner <andre.werner@xxxxxxxxxxxxxxxxxxxxx> --- v3: - Delete ADS7138 compatible and comments. - Add options for CRC, status and average samples as well as gpio-controller. - Update example. --- .../bindings/iio/adc/ti,ads7038.yaml | 84 +++++++++++++++++++ 1 file changed, 84 insertions(+) create mode 100644 Documentation/devicetree/bindings/iio/adc/ti,ads7038.yaml diff --git a/Documentation/devicetree/bindings/iio/adc/ti,ads7038.yaml b/Documentation/devicetree/bindings/iio/adc/ti,ads7038.yaml new file mode 100644 index 000000000000..323f86c5e682 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/adc/ti,ads7038.yaml @@ -0,0 +1,84 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/iio/adc/ti,ads7038.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Texas Instruments ADS7038 and similar ADCs + +maintainers: + - Andre Werner <andre.werner@xxxxxxxxxxxxxxxxxxxxx> + +description: | + Family of 7 channel, 12 bit ADCs with SPI interface. + + Datasheet: https://www.ti.com/lit/gpn/ads7038 + +properties: + compatible: + enum: + - ti,ads7038 + + reg: + maxItems: 1 + + spi-max-frequency: + maximum: 60000000 + + avdd-supply: + description: Analog supply voltage, also used as the reference voltage to the ADC. + + dvdd-supply: + description: Digital I/O supply voltage. + + average-samples: + description: | + If specified ADC is configured for avaraging measurements (OSR_CFG Register). + This effects output format for measurement and sampling time. + $ref: /schemas/types.yaml#/definitions/uint32 + enum: [0,1,2,3,4,5,6,7] + + status-enabled: + description: | + If specified ADC transmits chip status (DATA_CFG Register). + + crc-enabled: + description: | + Checking the integrity of the data bits exchanged over + SPI interface (GENERAL_CFG Register). + + gpio-controller: + const: true + decription: Marks the device node as a GPIO controller. + + "#gpio-cells": + const: 2 + description: Should be 2. See gpio.txt in this directory for a + description of the cells format. + +required: + - compatible + - reg + - avdd-supply + - dvdd-supply + - gpio-controller + - #gpio-cells + +additionalProperties: false + +examples: + - | + spi { + #address-cells = <1>; + #size-cells = <0>; + + adc@0 { + compatible = "ti,ads7038"; + reg = <0>; + avdd-supply = <&refin_avdd_supply>; + avdd-supply = <&refin_dvdd_supply>; + spi-max-frequency = <10000000>; + gpio-controller; + #gpio-cells = <2>; + }; + }; -- 2.42.0
