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<95dfb96e-f7b8-45df-a704-2984bd0a2946@vaisala.com> Date: Fri, 5 Dec 2025 09:52:34 +0200 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 1/3] dt-bindings: iio: adc: Add AD4134 To: Marcelo Schmitt , linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org Cc: jic23@kernel.org, nuno.sa@analog.com, dlechner@baylibre.com, andy@kernel.org, Michael.Hennerich@analog.com, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, corbet@lwn.net, marcelo.schmitt1@gmail.com, Conor Dooley References: <06d7be2af0f6520c23f612fa0249ff6a26655cb7.1764708608.git.marcelo.schmitt@analog.com> Content-Language: en-US From: Tomas Melin In-Reply-To: <06d7be2af0f6520c23f612fa0249ff6a26655cb7.1764708608.git.marcelo.schmitt@analog.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-ClientProxiedBy: GV3P280CA0038.SWEP280.PROD.OUTLOOK.COM (2603:10a6:150:9::16) To AMBPR06MB10365.eurprd06.prod.outlook.com (2603:10a6:20b:6f0::7) 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=?utf-8?B?RjJTRGd1ZHcxME9xMXE0YUkyL25iV1FIbTVVaEFCOGdNaHZBbWxjSVozbmxx?= =?utf-8?B?d3c9PQ==?= X-OriginatorOrg: vaisala.com X-MS-Exchange-CrossTenant-Network-Message-Id: 9252eedb-87f9-43c2-0551-08de33d35f2c X-MS-Exchange-CrossTenant-AuthSource: AMBPR06MB10365.eurprd06.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 05 Dec 2025 07:53:26.1717 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 6d7393e0-41f5-4c2e-9b12-4c2be5da5c57 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: GmWAL15EzMX8PrgB9Erqf61QaEQpjIFqu0VC/PFtppVnDcQlZL/HtDvVwF/NlLV4jQ2bqp3zHzSfx/ogJRM7UQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: PAXPR06MB7982 Hi, On 02/12/2025 22:55, Marcelo Schmitt wrote: > Add device tree documentation for AD4134 24-Bit, 4-channel simultaneous > sampling, precision ADC. > > Reviewed-by: Conor Dooley > Signed-off-by: Marcelo Schmitt > --- > Change log v2 -> v3: > - fixed typo in powerdown-gpios description. > - picked up Conor's review tag. > > .../bindings/iio/adc/adi,ad4134.yaml | 198 ++++++++++++++++++ > MAINTAINERS | 7 + > 2 files changed, 205 insertions(+) > create mode 100644 Documentation/devicetree/bindings/iio/adc/adi,ad4134.yaml > > diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad4134.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad4134.yaml > new file mode 100644 > index 000000000000..69a6ddf6ca92 > --- /dev/null > +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad4134.yaml > @@ -0,0 +1,198 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/iio/adc/adi,ad4134.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Analog Devices AD4134 ADC > + > +maintainers: > + - Marcelo Schmitt > + > +description: | > + The AD4134 is a quad channel, low noise, simultaneous sampling, precision > + analog-to-digital converter (ADC). > + Specifications can be found at: > + https://www.analog.com/media/en/technical-documentation/data-sheets/ad4134.pdf > + > +$ref: /schemas/spi/spi-peripheral-props.yaml# > + > +properties: > + maxItems: 1 > + > + adi,asrc-mode: > + $ref: /schemas/types.yaml#/definitions/string > + description: > + Asynchronous Sample Rate Converter (ASRC) operation mode control input. > + Describes whether the MODE pin is set to a high level (for master mode > + operation) or to a low level (for slave mode operation). > + enum: [ high, low ] > + default: low Since minimim I/O mode is only one currently supported, this should always be low, right? Is the property needed at this point? > + > + adi,dclkio: > + description: > + DCLK pin I/O direction control for when the device operates in Pin Control > + Slave Mode or in SPI Control Mode. Describes if DEC0/DCLKIO pin is at a > + high level (which configures DCLK as an output) or to set to a low level > + (configuring DCLK for input). > + enum: [ out, in ] > + default: in > + > + adi,dclkmode: > + description: > + DCLK mode control for when the device operates in Pin Control Slave Mode > + or in SPI Control Mode. Describes whether the DEC1/DCLKMODE pin is set to > + a high level (configuring the DCLK to operate in free running mode) or > + to a low level (to configure DCLK to operate in gated mode). > + enum: [ free-running, gated ] > + default: gated In minimum I/O mode datasheet mentions this should always be gated. Perhaps this and adi,dclkio can be left out and added when driver gains other support than I/O mode? Thanks, Tomas > + > +required: > + - compatible > + - reg > + - avdd5-supply > + - dvdd5-supply > + - iovdd-supply > + - refin-supply > + - clocks > + - clock-names > + > +allOf: > + - if: > + not: > + required: > + - ldoin-supply > + then: > + required: > + - avdd1v8-supply > + - dvdd1v8-supply > + - clkvdd-supply > + > +unevaluatedProperties: false > + > +examples: > + - | > + #include > + > + spi { > + #address-cells = <1>; > + #size-cells = <0>; > + > + adc@0 { > + compatible = "adi,ad4134"; > + reg = <0>; > + > + spi-max-frequency = <1000000>; > + > + reset-gpios = <&gpio0 86 GPIO_ACTIVE_LOW>; > + odr-gpios = <&gpio0 87 GPIO_ACTIVE_HIGH>; > + powerdown-gpios = <&gpio0 88 GPIO_ACTIVE_LOW>; > + > + clocks = <&sys_clk>; > + clock-names = "clkin"; > + > + avdd5-supply = <&avdd5>; > + dvdd5-supply = <&dvdd5>; > + iovdd-supply = <&iovdd>; > + refin-supply = <&refin>; > + avdd1v8-supply = <&avdd1v8>; > + dvdd1v8-supply = <&dvdd1v8>; > + clkvdd-supply = <&clkvdd>; > + > + adi,asrc-mode = "low"; > + adi,dclkio = "in"; > + adi,dclkmode = "gated"; > + > + regulators { > + vcm_reg: vcm-output { > + regulator-name = "ad4134-vcm"; > + }; > + }; > + > + }; > + }; > +... > diff --git a/MAINTAINERS b/MAINTAINERS > index 31d98efb1ad1..b9029c4055e3 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -1449,6 +1449,13 @@ F: Documentation/ABI/testing/sysfs-bus-iio-adc-ad4130 > F: Documentation/devicetree/bindings/iio/adc/adi,ad4130.yaml > F: drivers/iio/adc/ad4130.c > > +ANALOG DEVICES INC AD4134 DRIVER > +M: Marcelo Schmitt > +L: linux-iio@vger.kernel.org > +S: Supported > +W: https://ez.analog.com/linux-software-drivers > +F: Documentation/devicetree/bindings/iio/adc/adi,ad4134.yaml > + > ANALOG DEVICES INC AD4170-4 DRIVER > M: Marcelo Schmitt > L: linux-iio@vger.kernel.org