From patchwork Fri May 31 19:42:27 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Dumitru Ceclan via B4 Relay X-Patchwork-Id: 13682056 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 80111179654; Fri, 31 May 2024 19:42:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717184571; cv=none; b=KP/MVPTRlJvFC0GSC67HnBY10adwmvC+ZqXPG69aP8/NLvT9+XSwfVpWEugkhVu8vAwd/jH7Zck9vKG1zFrb9ay15CpFuH8O29Qs7E82iCJig4mnAPw5XgjONPzS0ZE4VwcgmxxRcFUhUZIVoOefuWSgVoS7d889tfSeCUUmDOs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717184571; c=relaxed/simple; bh=iGaZp8H3G4+QX/RI/q+767NxJulbdkdzJpWxohTv6YI=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=HbTvgLwfk27sLKu591L2GDvkI9p090gWU/njCWPJh3s+Dq4DowY2HoFyOkpRXk5wks8OIxX6G2kGt4gjFSq1AXc56/hHHxFSmGdoigEXJ9eMxSxNehv0/hyBFRlCzBbHg63LdRTDAfFH0tgtWpaKz1jxaHVwu5YoYC+LdtgYA0w= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=D3h/IR6H; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="D3h/IR6H" Received: by smtp.kernel.org (Postfix) with ESMTPS id 27E80C32789; Fri, 31 May 2024 19:42:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1717184571; bh=iGaZp8H3G4+QX/RI/q+767NxJulbdkdzJpWxohTv6YI=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=D3h/IR6HuYKdmFxbvwXBBRhEbDowhv9erwKELzeccUbmiwZ846sFDO1vD2j3M6C+f gk7ngOvOHrlHM6Zef7BXQyb0/KhugLnDPOLjl46WcVySa87FKSKanxB+cuW6BWHutk xVknFt6CM39ooioevqi6apwBGzex93L/koUf9MlD4K0U0llZDH+7RwzQF+AbpVnLUR n1NEaujExo9JQA4Xuooy8FiVNpP9Aj6g64pAmZRBY5IwU1APKOYFQUSbguY8g3KMKb okambjdTYtDvJYT5CqyFajKkYs5FK+041iSJAGgK4L6tdEh4lLgCLrfkkHyJ7rHwAW nfrFKRe7oOxQw== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 11F5CC27C4F; Fri, 31 May 2024 19:42:51 +0000 (UTC) From: Dumitru Ceclan via B4 Relay Date: Fri, 31 May 2024 22:42:27 +0300 Subject: [PATCH v4 1/6] dt-bindings: adc: ad7173: add support for ad411x Precedence: bulk X-Mailing-List: linux-iio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240531-ad4111-v4-1-64607301c057@analog.com> References: <20240531-ad4111-v4-0-64607301c057@analog.com> In-Reply-To: <20240531-ad4111-v4-0-64607301c057@analog.com> To: Ceclan Dumitru Cc: Lars-Peter Clausen , Michael Hennerich , Jonathan Cameron , Rob Herring , Krzysztof Kozlowski , Conor Dooley , David Lechner , linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Dumitru Ceclan X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1717184569; l=8710; i=dumitru.ceclan@analog.com; s=20240313; h=from:subject:message-id; bh=PM7BwdJbpQwyM+2GI7zCVGR1f3pC7c+bSTpc05Tuc/w=; b=AFBu9RsoKmBp4kpQQz3r2cV0PDeTCGhrpuulZ2AgYboM4za+gI7KAt3sWFq/nBQS5ehFU2m7k 7gSKaQ+dr9QDZYryaq5V6Srp5Lsb0y0K3/QwgTgMcXyxUOvVG5KklZk X-Developer-Key: i=dumitru.ceclan@analog.com; a=ed25519; pk=HdqMlVyrcazwoiai7oN6ghU+Bj1pusGUFRl30jhS7Bo= X-Endpoint-Received: by B4 Relay for dumitru.ceclan@analog.com/20240313 with auth_id=140 X-Original-From: Dumitru Ceclan Reply-To: dumitru.ceclan@analog.com From: Dumitru Ceclan Add support for: AD4111, AD4112, AD4114, AD4115, AD4116. AD411x family ADCs support a VCOM pin. The purpose of this pin is to offer a dedicated common-mode voltage input for single-ended channels. This pin is specified as supporting a differential channel with VIN10 on model AD4116. AD4111/AD4112 support current channels. Support is implemented using single-channel and "adi,current-channel". Signed-off-by: Dumitru Ceclan --- .../devicetree/bindings/iio/adc/adi,ad7173.yaml | 192 ++++++++++++++++++++- 1 file changed, 190 insertions(+), 2 deletions(-) diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7173.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad7173.yaml index ea6cfcd0aff4..d8474eee553e 100644 --- a/Documentation/devicetree/bindings/iio/adc/adi,ad7173.yaml +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7173.yaml @@ -19,7 +19,18 @@ description: | primarily for measurement of signals close to DC but also delivers outstanding performance with input bandwidths out to ~10kHz. + Analog Devices AD411x ADC's: + The AD411X family encompasses a series of low power, low noise, 24-bit, + sigma-delta analog-to-digital converters that offer a versatile range of + specifications. They integrate an analog front end suitable for processing + fully differential/single-ended and bipolar voltage inputs. + Datasheets for supported chips: + https://www.analog.com/media/en/technical-documentation/data-sheets/AD4111.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/AD4112.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/AD4114.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/AD4115.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/AD4116.pdf https://www.analog.com/media/en/technical-documentation/data-sheets/AD7172-2.pdf https://www.analog.com/media/en/technical-documentation/data-sheets/AD7172-4.pdf https://www.analog.com/media/en/technical-documentation/data-sheets/AD7173-8.pdf @@ -31,6 +42,11 @@ description: | properties: compatible: enum: + - adi,ad4111 + - adi,ad4112 + - adi,ad4114 + - adi,ad4115 + - adi,ad4116 - adi,ad7172-2 - adi,ad7172-4 - adi,ad7173-8 @@ -129,10 +145,54 @@ patternProperties: maximum: 15 diff-channels: + description: | + This property is used for defining the inputs of a differential + voltage channel. The first value is the positive input and the second + value is the negative input of the channel. + + Family AD411x supports a dedicated VINCOM voltage input. + To select it set the second channel to 16. + (VIN2, VINCOM) -> diff-channels = <2 16> + + There are special values that can be selected besides the voltage + analog inputs: + 21: REF+ + 22: REF− + Supported only by AD7172-2, AD7172-4, AD7175-2, AD7175-8, AD7177-2: + 19: ((AVDD1 − AVSS)/5)+ + 20: ((AVDD1 − AVSS)/5)− + items: minimum: 0 maximum: 31 + single-channel: + description: | + This property is used for defining a current channel or the positive + input of a voltage channel (single-ended or pseudo-differential). + + Models AD4111 and AD4112 support current channels. + Example: (IIN2+, IIN2−) -> single-channel = <2> + To correctly configure a current channel set the "adi,current-channel" + property to true. + + To configure a single-ended/pseudo-differential channel set the + "adi,common-mode-channel" property to the desired negative voltage input. + + When used as a voltage channel, special inputs are valid as well. + minimum: 0 + maximum: 31 + + adi,common-mode-channel: + $ref: /schemas/types.yaml#/definitions/uint32 + description: + This property is used for defining the negative input of a + single-ended or pseudo-differential voltage channel. + + Special inputs are valid as well. + minimum: 0 + maximum: 31 + adi,reference-select: description: | Select the reference source to use when converting on @@ -154,9 +214,31 @@ patternProperties: - avdd default: refout-avss + adi,current-channel: + description: | + Signal that the selected inputs are current channels. + Only available on AD4111 and AD4112. + type: boolean + required: - reg - - diff-channels + + allOf: + - oneOf: + - required: [single-channel] + properties: + diff-channels: false + - required: [diff-channels] + properties: + single-channel: false + adi,current-channel: false + adi,common-mode-channel: false + + - if: + required: ["adi,common-mode-channel"] + then: + properties: + adi,current-channel: false required: - compatible @@ -166,7 +248,6 @@ allOf: - $ref: /schemas/spi/spi-peripheral-props.yaml# # Only ad7172-4, ad7173-8 and ad7175-8 support vref2 - # Other models have [0-3] channel registers - if: properties: compatible: @@ -187,6 +268,37 @@ allOf: - vref - refout-avss - avdd + + - if: + properties: + compatible: + contains: + enum: + - adi,ad4114 + - adi,ad4115 + - adi,ad4116 + - adi,ad7173-8 + - adi,ad7175-8 + then: + patternProperties: + "^channel@[0-9a-f]$": + properties: + reg: + maximum: 15 + + - if: + properties: + compatible: + contains: + enum: + - adi,ad7172-2 + - adi,ad7175-2 + - adi,ad7176-2 + - adi,ad7177-2 + then: + patternProperties: + "^channel@[0-9a-f]$": + properties: reg: maximum: 3 @@ -210,6 +322,34 @@ allOf: required: - adi,reference-select + - if: + properties: + compatible: + contains: + enum: + - adi,ad4111 + - adi,ad4112 + - adi,ad4114 + - adi,ad4115 + - adi,ad4116 + then: + properties: + avdd2-supply: false + + - if: + properties: + compatible: + not: + contains: + enum: + - adi,ad4111 + - adi,ad4112 + then: + patternProperties: + "^channel@[0-9a-f]$": + properties: + adi,current-channel: false + - if: anyOf: - required: [clock-names] @@ -221,6 +361,7 @@ allOf: unevaluatedProperties: false examples: + # Example AD7173-8 with external reference connected to REF+/REF-: - | #include #include @@ -277,3 +418,50 @@ examples: }; }; }; + + # Example AD4111 with current channel and single-ended channel: + - | + #include + #include + + spi { + #address-cells = <1>; + #size-cells = <0>; + + adc@0 { + compatible = "adi,ad4111"; + reg = <0>; + + #address-cells = <1>; + #size-cells = <0>; + + interrupts = <25 IRQ_TYPE_EDGE_FALLING>; + interrupt-names = "rdy"; + interrupt-parent = <&gpio>; + spi-max-frequency = <5000000>; + gpio-controller; + #gpio-cells = <2>; + #clock-cells = <0>; + + channel@0 { + reg = <0>; + bipolar; + diff-channels = <4 5>; + }; + + // Single ended channel VIN2/VINCOM + channel@1 { + reg = <1>; + bipolar; + single-channel = <2>; + adi,common-mode-channel = <16>; + }; + + // Current channel IN2+/IN2- + channel@2 { + reg = <2>; + single-channel = <2>; + adi,current-channel; + }; + }; + };