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Message-ID: <BN3PR0301MB0897E42E948C8067DABFF9858E1D0@BN3PR0301MB0897.namprd03.prod.outlook.com>
Date:   Mon, 27 May 2019 06:29:12 +0000
From:   "Hennerich, Michael" <Michael.Hennerich@...log.com>
To:     Jonathan Cameron <jic23@...nel.org>,
        Renato Lui Geh <renatogeh@...il.com>
CC:     "lars@...afoo.de" <lars@...afoo.de>,
        "knaack.h@....de" <knaack.h@....de>,
        "pmeerw@...erw.net" <pmeerw@...erw.net>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "Popa, Stefan Serban" <StefanSerban.Popa@...log.com>,
        "Ardelean, Alexandru" <alexandru.Ardelean@...log.com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "linux-iio@...r.kernel.org" <linux-iio@...r.kernel.org>,
        "devel@...verdev.osuosl.org" <devel@...verdev.osuosl.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "kernel-usp@...glegroups.com" <kernel-usp@...glegroups.com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: RE: [PATCH v2 1/2] dt-bindings: iio: adc: add adi,ad7780.yaml binding



> -----Original Message-----
> From: Jonathan Cameron [mailto:jic23@...nel.org]
> Sent: Sonntag, 26. Mai 2019 18:39
> To: Renato Lui Geh <renatogeh@...il.com>
> Cc: lars@...afoo.de; Hennerich, Michael <Michael.Hennerich@...log.com>; knaack.h@....de; pmeerw@...erw.net;
> gregkh@...uxfoundation.org; Popa, Stefan Serban <StefanSerban.Popa@...log.com>; Ardelean, Alexandru
> <alexandru.Ardelean@...log.com>; robh+dt@...nel.org; mark.rutland@....com; linux-iio@...r.kernel.org;
> devel@...verdev.osuosl.org; linux-kernel@...r.kernel.org; kernel-usp@...glegroups.com; devicetree@...r.kernel.org
> Subject: Re: [PATCH v2 1/2] dt-bindings: iio: adc: add adi,ad7780.yaml binding
> 
> On Fri, 24 May 2019 22:26:30 -0300
> Renato Lui Geh <renatogeh@...il.com> wrote:
> 
> > This patch adds a YAML binding for the Analog Devices AD7780/1 and
> > AD7170/1 analog-to-digital converters.
> >
> > Signed-off-by: Renato Lui Geh <renatogeh@...il.com>
> Looks good to me, but I'm still finding my feet with these so will
> leave it for a few days for others to have time to comment.
> 
> Michael, looking for a quick reply from you to say if you are happy
> being explicitly listed as maintainer for this one, or if you'd
> rather land it on someone else.  Same applies for patch 2.

Hi Jonathan,

Listing me as an maintainer is ok.

Acked-by: Michael Hennerich <michael.hennerich@...log.com>


> 
> Renato, if I seem to have forgotten this in a week or so, feel
> free to give me a poke. I've been known to loose patches entirely!
> 
> Thanks,
> 
> Jonathan
> > ---
> > Changes in v2:
> >  - vref-supply to avdd-supply
> >  - remove avdd-supply from required list
> >  - include adc block in an spi block
> >
> >  .../bindings/iio/adc/adi,ad7780.txt           | 48 ----------
> >  .../bindings/iio/adc/adi,ad7780.yaml          | 87 +++++++++++++++++++
> >  2 files changed, 87 insertions(+), 48 deletions(-)
> >  delete mode 100644 Documentation/devicetree/bindings/iio/adc/adi,ad7780.txt
> >  create mode 100644 Documentation/devicetree/bindings/iio/adc/adi,ad7780.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7780.txt b/Documentation/devicetree/bindings/iio/adc/adi,ad7780.txt
> > deleted file mode 100644
> > index 440e52555349..000000000000
> > --- a/Documentation/devicetree/bindings/iio/adc/adi,ad7780.txt
> > +++ /dev/null
> > @@ -1,48 +0,0 @@
> > -* Analog Devices AD7170/AD7171/AD7780/AD7781
> > -
> > -Data sheets:
> > -
> > -- AD7170:
> > -     * https://www.analog.com/media/en/technical-documentation/data-sheets/AD7170.pdf
> > -- AD7171:
> > -     * https://www.analog.com/media/en/technical-documentation/data-sheets/AD7171.pdf
> > -- AD7780:
> > -     * https://www.analog.com/media/en/technical-documentation/data-sheets/ad7780.pdf
> > -- AD7781:
> > -     * https://www.analog.com/media/en/technical-documentation/data-sheets/AD7781.pdf
> > -
> > -Required properties:
> > -
> > -- compatible: should be one of
> > -     * "adi,ad7170"
> > -     * "adi,ad7171"
> > -     * "adi,ad7780"
> > -     * "adi,ad7781"
> > -- reg: spi chip select number for the device
> > -- vref-supply: the regulator supply for the ADC reference voltage
> > -
> > -Optional properties:
> > -
> > -- powerdown-gpios:  must be the device tree identifier of the PDRST pin. If
> > -                 specified, it will be asserted during driver probe. As the
> > -                 line is active high, it should be marked GPIO_ACTIVE_HIGH.
> > -- adi,gain-gpios:   must be the device tree identifier of the GAIN pin. Only for
> > -                 the ad778x chips. If specified, it will be asserted during
> > -                 driver probe. As the line is active low, it should be marked
> > -                 GPIO_ACTIVE_LOW.
> > -- adi,filter-gpios: must be the device tree identifier of the FILTER pin. Only
> > -                 for the ad778x chips. If specified, it will be asserted
> > -                 during driver probe. As the line is active low, it should be
> > -                 marked GPIO_ACTIVE_LOW.
> > -
> > -Example:
> > -
> > -adc@0 {
> > -     compatible =  "adi,ad7780";
> > -     reg =         <0>;
> > -     vref-supply = <&vdd_supply>
> > -
> > -     powerdown-gpios  = <&gpio 12 GPIO_ACTIVE_HIGH>;
> > -     adi,gain-gpios   = <&gpio  5 GPIO_ACTIVE_LOW>;
> > -     adi,filter-gpios = <&gpio 15 GPIO_ACTIVE_LOW>;
> > -};
> > diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7780.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad7780.yaml
> > new file mode 100644
> > index 000000000000..d1109416963c
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7780.yaml
> > @@ -0,0 +1,87 @@
> > +# SPDX-License-Identifier: GPL-2.0
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/iio/adc/adi,ad7780.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Analog Devices AD7170/AD7171/AD7780/AD7781 analog to digital converters
> > +
> > +maintainers:
> > +  - Michael Hennerich <michael.hennerich@...log.com>
> > +
> > +description: |
> > +  The ad7780 is a sigma-delta analog to digital converter. This driver provides
> > +  reading voltage values and status bits from both the ad778x and ad717x series.
> > +  Its interface also allows writing on the FILTER and GAIN GPIO pins on the
> > +  ad778x.
> > +
> > +  Specifications on the converters can be found at:
> > +    AD7170:
> > +      https://www.analog.com/media/en/technical-documentation/data-sheets/AD7170.pdf
> > +    AD7171:
> > +      https://www.analog.com/media/en/technical-documentation/data-sheets/AD7171.pdf
> > +    AD7780:
> > +      https://www.analog.com/media/en/technical-documentation/data-sheets/ad7780.pdf
> > +    AD7781:
> > +      https://www.analog.com/media/en/technical-documentation/data-sheets/AD7781.pdf
> > +
> > +properties:
> > +  compatible:
> > +    enum:
> > +      - adi,ad7170
> > +      - adi,ad7171
> > +      - adi,ad7780
> > +      - adi,ad7781
> > +
> > +  reg:
> > +    maxItems: 1
> > +
> > +  avdd-supply:
> > +    description:
> > +      The regulator supply for the ADC reference voltage.
> > +    maxItems: 1
> > +
> > +  powerdown-gpios:
> > +    description:
> > +      Must be the device tree identifier of the PDRST pin. If
> > +      specified, it will be asserted during driver probe. As the
> > +      line is active high, it should be marked GPIO_ACTIVE_HIGH.
> > +    maxItems: 1
> > +
> > +  adi,gain-gpios:
> > +    description:
> > +      Must be the device tree identifier of the GAIN pin. Only for
> > +      the ad778x chips. If specified, it will be asserted during
> > +      driver probe. As the line is active low, it should be marked
> > +      GPIO_ACTIVE_LOW.
> > +    maxItems: 1
> > +
> > +  adi,filter-gpios:
> > +    description:
> > +      Must be the device tree identifier of the FILTER pin. Only
> > +      for the ad778x chips. If specified, it will be asserted
> > +      during driver probe. As the line is active low, it should be
> > +      marked GPIO_ACTIVE_LOW.
> > +    maxItems: 1
> > +
> > +required:
> > +  - compatible
> > +  - reg
> > +
> > +examples:
> > +  - |
> > +    #include <dt-bindings/gpio/gpio.h>
> > +    spi0 {
> > +        #address-cells = <1>;
> > +        #size-cells = <0>;
> > +
> > +        adc@0 {
> > +            compatible = "adi,ad7780";
> > +            reg = <0>;
> > +
> > +            avdd-supply      = <&vdd_supply>;
> > +            powerdown-gpios  = <&gpio0 12 GPIO_ACTIVE_HIGH>;
> > +            adi,gain-gpios   = <&gpio1  5 GPIO_ACTIVE_LOW>;
> > +            adi,filter-gpios = <&gpio2 15 GPIO_ACTIVE_LOW>;
> > +        };
> > +    };

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