linux-kernel - Re: [PATCH 2/4] dt-bindings: iio: adc: Add the GE HealthCare PMC ADC

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Message-ID: <20241001-corrode-preteen-546c98d45976@spud>
Date: Tue, 1 Oct 2024 17:18:30 +0100
From: Conor Dooley <conor@...nel.org>
To: Herve Codina <herve.codina@...tlin.com>
Cc: Jonathan Cameron <jic23@...nel.org>,
	Lars-Peter Clausen <lars@...afoo.de>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, linux-iio@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	Luca Ceresoli <luca.ceresoli@...tlin.com>,
	Ian Ray <ian.ray@...ealthcare.com>,
	Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: Re: [PATCH 2/4] dt-bindings: iio: adc: Add the GE HealthCare PMC ADC

On Tue, Oct 01, 2024 at 09:46:16AM +0200, Herve Codina wrote:
> The GE HealthCare PMC Analog to Digital Converter (ADC) is a 16-Channel
> (voltage and current), 16-Bit ADC with an I2C Interface.
> 
> Signed-off-by: Herve Codina <herve.codina@...tlin.com>
> ---
>  .../bindings/iio/adc/gehc,pmc-adc.yaml        | 82 +++++++++++++++++++
>  include/dt-bindings/iio/adc/gehc,pmc-adc.h    | 10 +++
>  2 files changed, 92 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/iio/adc/gehc,pmc-adc.yaml
>  create mode 100644 include/dt-bindings/iio/adc/gehc,pmc-adc.h
> 
> diff --git a/Documentation/devicetree/bindings/iio/adc/gehc,pmc-adc.yaml b/Documentation/devicetree/bindings/iio/adc/gehc,pmc-adc.yaml
> new file mode 100644
> index 000000000000..6b2bb1309767
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/iio/adc/gehc,pmc-adc.yaml
> @@ -0,0 +1,82 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/iio/adc/gehc,pmc-adc.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: GE HealthCare PMC Analog to Digital Converter (ADC)
> +
> +maintainers:
> +  - Herve Codina <herve.codina@...tlin.com>
> +
> +description:
> +  The GE HealthCare PMC ADC is a 16-Channel (voltage and current), 16-Bit ADC
> +  with an I2C Interface.
> +
> +properties:
> +  compatible:
> +    const: gehc,pmc-adc
> +
> +  reg:
> +    maxItems: 1
> +
> +  vdd-supply:
> +    description:
> +      Regulator for the VDD power supply.
> +
> +  vdda-supply:
> +    description:
> +      Regulator for the VDD analog (VDDA) power supply.
> +
> +  vddio-supply:
> +    description:
> +      Regulator for the VDD IO (VDDIO) power supply.
> +
> +  vref-supply:
> +    description:
> +      Regulator for the voltage reference power supply.
> +
> +  clocks:
> +    maxItems: 1
> +
> +  clock-names:
> +    items:
> +      - const: osc

Since there's no datasheet for me to look up, why is the clock optional?

> +
> +  "#io-channel-cells":
> +    const: 2
> +    description: |
> +      The first cell is the channel type (dt-bindings/iio/adc/gehc,pmc-adc.h
> +      defines these values):
> +       - 0: voltage
> +       - 1: current
> +      The second cell is the channel number from 0 to 15.
> +
> +required:
> +  - compatible
> +  - reg
> +  - vdd-supply
> +  - vdda-supply
> +  - vddio-supply
> +  - vref-supply
> +  - '#io-channel-cells'
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    i2c {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        adc@14 {
> +            compatible = "gehc,pmc-adc";
> +            reg = <0x14>;
> +            vdd-supply = <&reg_vdd>;
> +            vdda-supply = <&reg_vdda>;
> +            vddio-supply = <&reg_vddio>;
> +            vref-supply = <&reg_vref>;
> +            #io-channel-cells = <2>;
> +        };
> +    };
> +...
> diff --git a/include/dt-bindings/iio/adc/gehc,pmc-adc.h b/include/dt-bindings/iio/adc/gehc,pmc-adc.h
> new file mode 100644
> index 000000000000..2f291e3c76ae
> --- /dev/null
> +++ b/include/dt-bindings/iio/adc/gehc,pmc-adc.h
> @@ -0,0 +1,10 @@
> +/* SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause */
> +
> +#ifndef _DT_BINDINGS_IIO_ADC_GEHC_PMC_ADC_H
> +#define _DT_BINDINGS_IIO_ADC_GEHC_PMC_ADC_H
> +
> +/* ADC channel type */
> +#define GEHC_PMC_ADC_VOLTAGE	0
> +#define GEHC_PMC_ADC_CURRENT	1
> +
> +#endif
> -- 
> 2.46.1
> 

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