linux-kernel - Re: [PATCH 1/2] bindings: iio: adc: Add max11205 documentation file

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Message-ID: <20220828174829.68f37d25@jic23-huawei>
Date:   Sun, 28 Aug 2022 17:48:29 +0100
From:   Jonathan Cameron <jic23@...nel.org>
To:     Ramona Bolboaca <ramona.bolboaca@...log.com>
Cc:     <robh+dt@...nel.org>, <krzysztof.kozlowski+dt@...aro.org>,
        <linux-iio@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] bindings: iio: adc: Add max11205 documentation file

On Wed, 24 Aug 2022 15:52:02 +0300
Ramona Bolboaca <ramona.bolboaca@...log.com> wrote:

> Add bindings documentation file and MAINTAINERS entry for MAX11205.
> 
> Signed-off-by: Ramona Bolboaca <ramona.bolboaca@...log.com>
Hi Ramona,

Welcome to IIO. 

A few comments inline to add to what Krzysztof sent.

Thanks,

Jonathan

> ---
>  .../bindings/iio/adc/maxim,max11205.yaml      | 65 +++++++++++++++++++
>  MAINTAINERS                                   |  8 +++
>  2 files changed, 73 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/iio/adc/maxim,max11205.yaml
> 
> diff --git a/Documentation/devicetree/bindings/iio/adc/maxim,max11205.yaml b/Documentation/devicetree/bindings/iio/adc/maxim,max11205.yaml
> new file mode 100644
> index 000000000000..bddd18a44969
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/iio/adc/maxim,max11205.yaml
> @@ -0,0 +1,65 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/iio/adc/maxim,max11205.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Maxim MAX11205 ADC
> +
> +maintainers:
> +  - Ramona Bolboaca <ramona.bolboaca@...log.com>
> +
> +description: |
> +  The MAX11205 is an ultra-low-power (< 300FA max
> +  active current), high-resolution, serial-output ADC.

Wrap lines nearer to 75-80 chars.

> +
> +  https://datasheets.maximintegrated.com/en/ds/MAX11205.pdf
> +
> +properties:
> +  compatible:
> +    enum:
> +      - maxim,max11205a
> +      - maxim,max11205b
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  spi-max-frequency:
> +    maximum: 5000000
> +
> +  spi-cpha: true
> +
> +  vref-supply:
> +    description:
> +      The regulator supply for the ADC reference voltage.

Might be worth mentioning it's a differential reference. I'm not 100% sure
how we handle those...  I guess as a regulator, but it's a little unusual.

Jonathan

> +
> +required:
> +  - compatible
> +  - reg
> +  - spi-max-frequency
> +  - spi-cpha
> +  - interrupts
> +  - vref-supply
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +    spi {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +        max11205@0 {
> +                      compatible = "maxim,max11205a";
> +                      reg = <0>;
> +                      spi-max-frequency = <5000000>;
> +                      spi-cpha;
> +                      interrupt-parent = <&gpio>;
> +                      interrupts = <19 IRQ_TYPE_EDGE_FALLING>;
> +                      vref-supply = <&max11205_vref>;
> +        };
> +    };
> +...
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 96f47a7865d6..db1b5dc03988 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -12341,6 +12341,14 @@ S:	Maintained
>  F:	Documentation/devicetree/bindings/iio/proximity/maxbotix,mb1232.yaml
>  F:	drivers/iio/proximity/mb1232.c
>  
> +MAXIM MAX11205 DRIVER
> +M:	Ramona Bolboaca <ramona.bolboaca@...log.com>
> +L:	linux-iio@...r.kernel.org
> +S:	Supported
> +W:	https://ez.analog.com/linux-software-drivers
> +F:	Documentation/devicetree/bindings/iio/adc/maxim,max11205.yaml
> +F:	drivers/iio/adc/max11205.c
> +
>  MAXIM MAX17040 FAMILY FUEL GAUGE DRIVERS
>  R:	Iskren Chernev <iskren.chernev@...il.com>
>  R:	Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>