On Wed, Dec 13, 2023 at 05:21:19AM -0600, David Lechner wrote: > This adds a binding specification for the Analog Devices Inc. AD7380 > family of ADCs. > > Signed-off-by: David Lechner <dlechner@xxxxxxxxxxxx> > --- > > v2 changes: > - Added maxItems to reg property > - Replaced adi,sdo-mode property with spi-rx-bus-channels > - Made spi-rx-bus-channels property optional with default value of 1 > (this made the if: check more complex) > - Changed example to use gpio for interrupt > > .../devicetree/bindings/iio/adc/adi,ad7380.yaml | 107 +++++++++++++++++++++ > MAINTAINERS | 9 ++ > 2 files changed, 116 insertions(+) > > diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7380.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad7380.yaml > new file mode 100644 > index 000000000000..43d58c52f7dd > --- /dev/null > +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7380.yaml > @@ -0,0 +1,107 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/iio/adc/adi,ad7380.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Analog Devices Simultaneous Sampling Analog to Digital Converters > + > +maintainers: > + - Michael Hennerich <Michael.Hennerich@xxxxxxxxxx> > + - Nuno Sá <nuno.sa@xxxxxxxxxx> > + > +description: | > + * https://www.analog.com/en/products/ad7380.html > + * https://www.analog.com/en/products/ad7381.html > + * https://www.analog.com/en/products/ad7383.html > + * https://www.analog.com/en/products/ad7384.html > + > +$ref: /schemas/spi/spi-peripheral-props.yaml# > + > +properties: > + compatible: > + enum: > + - adi,ad7380 > + - adi,ad7381 > + - adi,ad7383 > + - adi,ad7384 > + > + reg: > + maxItems: 1 > + > + spi-max-frequency: > + maximum: 80000000 > + spi-cpol: true > + spi-cpha: true > + > + spi-rx-bus-channels: This is now being framed as a standard property, so I think it should be in spi-peripheral-props, no? Granted, you'd need a rather more generalised explanation of the property in that case. > + description: > + In 1-wire mode, the SDOA pin acts as the sole data line and the SDOB/ALERT > + pin acts as the ALERT interrupt signal. In 2-wire mode, data for input A > + is read from SDOA and data for input B is read from SDOB/ALERT (and the > + ALERT interrupt signal is not available). > + enum: [1, 2] Jonathan also mentioned specifying that this defaults to 1-wire. I didn't see a response or that implemented. Did you miss that comment from him? Cheers, Conor. > + > + vcc-supply: > + description: A 3V to 3.6V supply that powers the chip. > + > + vlogic-supply: > + description: > + A 1.65V to 3.6V supply for the logic pins. > + > + refio-supply: > + description: > + A 2.5V to 3.3V supply for the external reference voltage. When omitted, > + the internal 2.5V reference is used. > + > + interrupts: > + description: > + When the device is using 1-wire mode, this property is used to optionally > + specify the ALERT interrupt. > + maxItems: 1 > + > +required: > + - compatible > + - reg > + - vcc-supply > + - vlogic-supply > + > +allOf: > + - if: > + required: > + - spi-rx-bus-channels > + then: > + if: > + properties: > + spi-rx-bus-channels: > + const: 2 > + then: > + properties: > + interrupts: false > + > +unevaluatedProperties: false > + > +examples: > + - | > + #include <dt-bindings/interrupt-controller/irq.h> > + > + spi { > + #address-cells = <1>; > + #size-cells = <0>; > + > + adc@0 { > + compatible = "adi,ad7380"; > + reg = <0>; > + > + spi-cpol; > + spi-cpha; > + spi-max-frequency = <80000000>; > + > + interrupts = <27 IRQ_TYPE_EDGE_FALLING>; > + interrupt-parent = <&gpio0>; > + > + vcc-supply = <&supply_3_3V>; > + vlogic-supply = <&supply_3_3V>; > + refio-supply = <&supply_2_5V>; > + }; > + }; > diff --git a/MAINTAINERS b/MAINTAINERS > index fe1f6f97f96a..e2a998be5879 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -430,6 +430,15 @@ W: http://wiki.analog.com/AD7142 > W: https://ez.analog.com/linux-software-drivers > F: drivers/input/misc/ad714x.c > > +AD738X ADC DRIVER (AD7380/1/2/4) > +M: Michael Hennerich <michael.hennerich@xxxxxxxxxx> > +M: Nuno Sá <nuno.sa@xxxxxxxxxx> > +R: David Lechner <dlechner@xxxxxxxxxxxx> > +S: Supported > +W: https://wiki.analog.com/resources/tools-software/linux-drivers/iio-adc/ad738x > +W: https://ez.analog.com/linux-software-drivers > +F: Documentation/devicetree/bindings/iio/adc/adi,ad7380.yaml > + > AD7877 TOUCHSCREEN DRIVER > M: Michael Hennerich <michael.hennerich@xxxxxxxxxx> > S: Supported > > -- > 2.34.1 >
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