From patchwork Tue Jun 18 23:12:16 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marcelo Schmitt X-Patchwork-Id: 13703146 Received: from mx0b-00128a01.pphosted.com (mx0a-00128a01.pphosted.com [148.163.135.77]) (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 8EC9F17CA1D; Tue, 18 Jun 2024 23:12:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=148.163.135.77 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718752373; cv=none; b=e+rTULkNX3GfAjX6i5jyrxOJJ1cA0+zf+OVv+vx0QcQpcKSoHeyUEbgNVx4dG0aAvy27iyv+GWJx18TLCbbOr8cMwV9YQK2yWxVGWLvqUfZJgkaXwNSw6vgNeWQRqB+vILBsUq3nHsYhdqTNJWy9qOrBaem20xY2WHM642Yzj8I= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718752373; c=relaxed/simple; bh=S7cJpobH29xeHpSJ566s4qKOHI9g40sqxiDt86czgQg=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=WK8nB4Y1MHiFQ/VqP276OAXbEnp5Wv3DMDCNg0GR9ECxJJbodBdUFNIG2VGfQRw/PBcmtEu8GGix4NTcBvGS2pNwTHei/FPNosX8CiOER+Be8OxCuS7R1AOXnLUS0QvAg1P8l14xs5qUwmjDdKqPqMIhFHWoVIkjWLXOJCmoRYg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=analog.com; spf=pass smtp.mailfrom=analog.com; dkim=pass (2048-bit key) header.d=analog.com header.i=@analog.com header.b=YKAeJHEL; arc=none smtp.client-ip=148.163.135.77 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=analog.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=analog.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=analog.com header.i=@analog.com header.b="YKAeJHEL" Received: from pps.filterd (m0375855.ppops.net [127.0.0.1]) by mx0b-00128a01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 45ILXQwv025603; Tue, 18 Jun 2024 19:12:35 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=analog.com; h=cc :content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=DKIM; bh=ojEaH xn6tRaYJRDAKNo59vS/Cmn2Ab0ICrazapNrdvY=; b=YKAeJHELMpCpa1MqSb6ar uaGIOc7l61pOmKc2mq9hP6GI3udTIidTmcSAaW9VIPtUkFjEI+n+IETSC546nZPT ZMP4ONZDybWfr2BYeWMbebPDIMWgTt/SiKtmqeZflmvTS5f1eaYR0yIbOQEfxdeD w4gnVxNTvoAOBH/sfxr+LRZiZAGrZkn4d8f6JKBJjningE6WqZ68oz/gtVTd2j05 AayuA5WqSTzVKiEVQfanj1JZlGC3FEZ/TOcrlaNqIuRzU5CmjI3QE+X57VKzr5qO bIOBFffjVYIZ02+kRONKgfs37tyu8FXRGzFF6EAffUkU6+mr7qsQ/5xdYB0sOq4b Q== Received: from nwd2mta3.analog.com ([137.71.173.56]) by mx0b-00128a01.pphosted.com (PPS) with ESMTPS id 3yuj8qr87n-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 18 Jun 2024 19:12:35 -0400 (EDT) Received: from ASHBMBX9.ad.analog.com (ASHBMBX9.ad.analog.com [10.64.17.10]) by nwd2mta3.analog.com (8.14.7/8.14.7) with ESMTP id 45INCXSP005947 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 18 Jun 2024 19:12:33 -0400 Received: from ASHBMBX8.ad.analog.com (10.64.17.5) by ASHBMBX9.ad.analog.com (10.64.17.10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.14; Tue, 18 Jun 2024 19:12:33 -0400 Received: from zeus.spd.analog.com (10.66.68.11) by ashbmbx8.ad.analog.com (10.64.17.5) with Microsoft SMTP Server id 15.2.986.14 via Frontend Transport; Tue, 18 Jun 2024 19:12:32 -0400 Received: from work.ad.analog.com (HYB-hERzalRezfV.ad.analog.com [10.65.205.129]) by zeus.spd.analog.com (8.15.1/8.15.1) with ESMTP id 45INCIgp021777; Tue, 18 Jun 2024 19:12:20 -0400 From: Marcelo Schmitt To: , , , , , , , , , CC: , , , Subject: [PATCH v4 5/6] dt-bindings: iio: adc: Add AD4000 Date: Tue, 18 Jun 2024 20:12:16 -0300 Message-ID: <34a16c6e513b32bc6111b695e1c8b467bd6993d9.1718749981.git.marcelo.schmitt@analog.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-spi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ADIRuleOP-NewSCL: Rule Triggered X-Proofpoint-GUID: 9Ncjs_dt4oeo03MOH9PJt2vOj4lDv5Sx X-Proofpoint-ORIG-GUID: 9Ncjs_dt4oeo03MOH9PJt2vOj4lDv5Sx X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.28.16 definitions=2024-06-18_06,2024-06-17_01,2024-05-17_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 bulkscore=0 lowpriorityscore=0 mlxscore=0 adultscore=0 spamscore=0 mlxlogscore=999 impostorscore=0 priorityscore=1501 malwarescore=0 clxscore=1015 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2405170001 definitions=main-2406180169 Add device tree documentation for AD4000 series of ADC devices. Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ad4000-4004-4008.pdf Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ad4001-4005.pdf Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ad4002-4006-4010.pdf Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ad4003-4007-4011.pdf Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ad4020-4021-4022.pdf Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/adaq4001.pdf Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/adaq4003.pdf Signed-off-by: Marcelo Schmitt --- .../bindings/iio/adc/adi,ad4000.yaml | 231 ++++++++++++++++++ MAINTAINERS | 7 + 2 files changed, 238 insertions(+) create mode 100644 Documentation/devicetree/bindings/iio/adc/adi,ad4000.yaml diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad4000.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad4000.yaml new file mode 100644 index 000000000000..ba50f9e0784b --- /dev/null +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad4000.yaml @@ -0,0 +1,231 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/iio/adc/adi,ad4000.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Analog Devices AD4000 and similar Analog to Digital Converters + +maintainers: + - Marcelo Schmitt + +description: | + Analog Devices AD4000 family of Analog to Digital Converters with SPI support. + Specifications can be found at: + https://www.analog.com/media/en/technical-documentation/data-sheets/ad4000-4004-4008.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/ad4001-4005.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/ad4002-4006-4010.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/ad4003-4007-4011.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/ad4020-4021-4022.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/adaq4001.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/adaq4003.pdf + +$ref: /schemas/spi/spi-peripheral-props.yaml# + +properties: + compatible: + oneOf: + - const: adi,ad4000 + - items: + - enum: + - adi,ad4004 + - adi,ad4008 + - const: adi,ad4000 + - const: adi,ad4001 + - items: + - enum: + - adi,ad4005 + - const: adi,ad4001 + - const: adi,ad4002 + - items: + - enum: + - adi,ad4006 + - adi,ad4010 + - const: adi,ad4002 + - const: adi,ad4003 + - items: + - enum: + - adi,ad4007 + - adi,ad4011 + - const: adi,ad4003 + - const: adi,ad4020 + - items: + - enum: + - adi,ad4021 + - adi,ad4022 + - const: adi,ad4020 + + reg: + maxItems: 1 + + spi-max-frequency: + maximum: 102040816 # for VIO > 2.7 V, 81300813 for VIO > 1.7 V + + adi,spi-mode: + $ref: /schemas/types.yaml#/definitions/string + enum: [ single, chain ] + description: | + This property indicates the SPI wiring configuration. + + When this property is omitted, it is assumed that the device is using what + the datasheet calls "4-wire mode". This is the conventional SPI mode used + when there are multiple devices on the same bus. In this mode, the CNV + line is used to initiate the conversion and the SDI line is connected to + CS on the SPI controller. + + When this property is present, it indicates that the device is using one + of the following alternative wiring configurations: + + * single: The datasheet calls this "3-wire mode". (NOTE: The datasheet's + definition of 3-wire mode is NOT at all related to the standard + spi-3wire property!) This mode is often used when the ADC is the only + device on the bus. In this mode, SDI is connected to MOSI or to VIO, and + the CNV line can be connected to the CS line of the SPI controller or to + a GPIO, in which case the CS line of the controller is unused. + * chain: The datasheet calls this "chain mode". This mode is used to save + on wiring when multiple ADCs are used. In this mode, the SDI line of + one chip is tied to the SDO of the next chip in the chain and the SDI of + the last chip in the chain is tied to GND. Only the first chip in the + chain is connected to the SPI bus. The CNV line of all chips are tied + together. The CS line of the SPI controller can be used as the CNV line + only if it is active high. + + '#daisy-chained-devices': true + + vdd-supply: + description: A 1.8V supply that powers the chip (VDD). + + vio-supply: + description: + A 1.8V to 5.5V supply for the digital inputs and outputs (VIO). + + ref-supply: + description: + A 2.5 to 5V supply for the external reference voltage (REF). + + cnv-gpios: + description: + The Convert Input (CNV). This input has multiple functions. It initiates + the conversions and selects the SPI mode of the device (chain or CS). In + 'single' mode, this property is omitted if the CNV pin is connected to the + CS line of the SPI controller. + maxItems: 1 + + adi,high-z-input: + type: boolean + description: + High-Z mode allows the amplifier and RC filter in front of the ADC to be + chosen based on the signal bandwidth of interest, rather than the settling + requirements of the switched capacitor SAR ADC inputs. + + adi,gain-milli: + description: | + The hardware gain applied to the ADC input (in milli units). + The gain provided by the ADC input scaler is defined by the hardware + connections between chip pins OUT+, R1K-, R1K1-, R1K+, R1K1+, and OUT-. + If not present, default to 1000 (no actual gain applied). + $ref: /schemas/types.yaml#/definitions/uint16 + enum: [454, 909, 1000, 1900] + default: 1000 + + interrupts: + description: + The SDO pin can also function as a busy indicator. This node should be + connected to an interrupt that is triggered when the SDO line goes low + while the SDI line is high and the CNV line is low ('single' mode) or the + SDI line is low and the CNV line is high ('multi' mode); or when the SDO + line goes high while the SDI and CNV lines are high (chain mode), + maxItems: 1 + +required: + - compatible + - reg + - vdd-supply + - vio-supply + - ref-supply + +allOf: + # in '4-wire' mode, cnv-gpios is required, for other modes it is optional + - if: + not: + required: + - adi,spi-mode + then: + required: + - cnv-gpios + # The configuration register can only be accessed in '3-wire' mode + - if: + not: + properties: + adi,spi-mode: + contains: + enum: + - single + then: + properties: + adi,high-z-input: false + # chain mode has lower SCLK max rate + - if: + required: + - adi,spi-mode + properties: + adi,spi-mode: + const: chain + then: + properties: + spi-max-frequency: + maximum: 50000000 # for VIO > 2.7 V, 40000000 for VIO > 1.7 V + required: + - '#daisy-chained-devices' + else: + properties: + '#daisy-chained-devices': false + # Gain property only applies to ADAQ devices + - if: + properties: + compatible: + not: + contains: + enum: + - adi,adaq4001 + - adi,adaq4003 + then: + properties: + adi,gain-milli: false + +unevaluatedProperties: false + +examples: + - | + #include + spi { + #address-cells = <1>; + #size-cells = <0>; + /* Example for a AD devices */ + adc@0 { + compatible = "adi,ad4020"; + reg = <0>; + spi-max-frequency = <71000000>; + vdd-supply = <&supply_1_8V>; + vio-supply = <&supply_1_8V>; + ref-supply = <&supply_5V>; + cnv-gpios = <&gpio0 88 GPIO_ACTIVE_HIGH>; + }; + }; + - | + spi { + #address-cells = <1>; + #size-cells = <0>; + /* Example for a ADAQ devices */ + adc@0 { + compatible = "adi,adaq4003"; + reg = <0>; + spi-max-frequency = <80000000>; + vdd-supply = <&supply_1_8V>; + vio-supply = <&supply_1_8V>; + ref-supply = <&supply_5V>; + adi,high-z-input; + adi,gain-milli = /bits/ 16 <454>; + adi,spi-mode = "single"; + }; + }; diff --git a/MAINTAINERS b/MAINTAINERS index bff979a507ba..1f052b9cd912 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1200,6 +1200,13 @@ W: https://ez.analog.com/linux-software-drivers F: Documentation/devicetree/bindings/iio/dac/adi,ad3552r.yaml F: drivers/iio/dac/ad3552r.c +ANALOG DEVICES INC AD4000 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,ad4000.yaml + ANALOG DEVICES INC AD4130 DRIVER M: Cosmin Tanislav L: linux-iio@vger.kernel.org