From patchwork Wed Jun 12 19:20:40 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: David Lechner X-Patchwork-Id: 13695500 Received: from mail-oi1-f171.google.com (mail-oi1-f171.google.com [209.85.167.171]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 999C383CCC for ; Wed, 12 Jun 2024 19:21:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.171 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718220108; cv=none; b=gOHEoxI8JsIxauoqnLOMIKBzDSR5D8B4TSeEz9ZqhP/whJVon7u9OxyWRQsItqfyNB/4kIczZoeMa8lQm7zwJKkQ2xNLg6+K4KLVzXagUcUO175360iIJoVB/13rasY7fGFA14XVjrWgLfzxj0kdu1Eelm2kEgh22g0yKpIe8dc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718220108; c=relaxed/simple; bh=dvmZdQy9gjHFAEqxiZyIZWPqYSmJNIY4i5p9DPr7XvE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=dIH9ci9CvB90uMOrl/vbDm/2HFJ3uB57UJW0PXR1rDYXAsO/zAdsUoScDo4QrtG0jEY+ZtOH6jJWnPzgmlO6C7MyoYqxSu6e6zJtyhdocT0h15awtizGCjDABu6JC3Y0jV/kotBiON3J6EE0AmAiPyXFKt/qmdXq1nYLyFnsIn8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=baylibre.com; spf=pass smtp.mailfrom=baylibre.com; dkim=pass (2048-bit key) header.d=baylibre-com.20230601.gappssmtp.com header.i=@baylibre-com.20230601.gappssmtp.com header.b=XBKued0E; arc=none smtp.client-ip=209.85.167.171 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=baylibre.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=baylibre.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=baylibre-com.20230601.gappssmtp.com header.i=@baylibre-com.20230601.gappssmtp.com header.b="XBKued0E" Received: by mail-oi1-f171.google.com with SMTP id 5614622812f47-3c9cc681ee7so95085b6e.1 for ; Wed, 12 Jun 2024 12:21:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baylibre-com.20230601.gappssmtp.com; s=20230601; t=1718220105; x=1718824905; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=adv6hAITLa2R1TJy+qkYE+hXBxIyKoUUbMRb5HfUdKM=; b=XBKued0ELmUiWkJlJe/H8jpSMqN3pxuZJtCv/ZN3IWBahoWQy1cTCCxCAyxYkYWNTo d9ghBK2+XXQEyAuFsFp2o/cuk3s9kMf4NGVbrzB6y1iE5h91dfPt+PzTGx+q4FDq3a79 nlINqqBBtoJSIgVZtrCo82CG7YddST2X0PbQJHxCL34ldpvFcf6zazabSwCGBurihJJN S9CU0wq+NBM5D6Vq8snA5LdriPEklugvHJHnU8QMBAZVjBPBHDWqABXA0d3Pm2cq25jc nBO0+M+W2xSORt7A2yjDq3qOOtQoexNANnZaq0ClaMvEXwbkIXY0OcCVbT7CyfwSYckf 663g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1718220105; x=1718824905; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=adv6hAITLa2R1TJy+qkYE+hXBxIyKoUUbMRb5HfUdKM=; b=R3P2batOItj+doBbORPPt2UOK14/z6XsjnXOALkBX1pMgir45irWnEsYp7UqaL6V50 BJ4JyjM8BSMJcCqW7FyFBZiZc9fRxe13EII0+m1gsw8p9Qi972OK4uVsFKNfr/jQVV8M XnhyIaex2E7CPlDwGrN3RV9t96id3OeEJYknSc7p70aHhZd2D4PUuKCXTRPIIYHxtgO7 bH6YzbEP2Y6RiYK8NvWRr0LO0enDwGNhzO9UTxUt3LcuEsjqhU8hy/JGrT/z9Edo+Rlu 7K0gKUA32mNpSDhYdJu+jWe6dK7WAeqKQDxtPsQvB3j+NtkVVxdeoBYPYsylcuBMAkmy eo0Q== X-Forwarded-Encrypted: i=1; AJvYcCWU5tfbjw3e+4hCjBxZYI3pu5DeVDkDkDLbB/kph721IsgizGV2OV1XywSN4bJ+Qgk1oRD7SXuXPJHCIbo+3zNBU39XxUIDjwbO X-Gm-Message-State: AOJu0YxGSaemS5GadarGyQ3zpuQfA7c+AxXwCd1ip+9Y8VqWZwHy3YKz 2KzILwleqmwuZSML2ceuSoqBS4jzZxacuWDysbupnbmJ08+Z417qv3kEnnUN7Sc= X-Google-Smtp-Source: AGHT+IEQPfuf8Deay2ughLjf0mO221a1T0deKLDRLG35q5BS6L/972WRFWOz57bW4VTx5wmhipo6sQ== X-Received: by 2002:a05:6808:d53:b0:3d2:1a98:24bb with SMTP id 5614622812f47-3d244e93710mr322991b6e.17.1718220101857; Wed, 12 Jun 2024 12:21:41 -0700 (PDT) Received: from freyr.lechnology.com (ip98-183-112-25.ok.ok.cox.net. [98.183.112.25]) by smtp.gmail.com with ESMTPSA id 5614622812f47-3d236676bfesm648795b6e.12.2024.06.12.12.21.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 12 Jun 2024 12:21:41 -0700 (PDT) From: David Lechner To: Jonathan Cameron , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: David Lechner , Michael Hennerich , =?utf-8?q?Nuno_S=C3=A1?= , Jonathan Corbet , linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org Subject: [PATCH 1/3] dt-bindings: iio: adc: add AD4695 and similar ADCs Date: Wed, 12 Jun 2024 14:20:40 -0500 Message-ID: <20240612-iio-adc-ad4695-v1-1-6a4ed251fc86@baylibre.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240612-iio-adc-ad4695-v1-0-6a4ed251fc86@baylibre.com> References: <20240612-iio-adc-ad4695-v1-0-6a4ed251fc86@baylibre.com> Precedence: bulk X-Mailing-List: linux-iio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Mailer: b4 0.12.4 Add device tree bindings for AD4695 and similar ADCs. Signed-off-by: David Lechner --- .../devicetree/bindings/iio/adc/adi,ad4695.yaml | 297 +++++++++++++++++++++ MAINTAINERS | 9 + 2 files changed, 306 insertions(+) diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad4695.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad4695.yaml new file mode 100644 index 000000000000..8ff5bbbbef9f --- /dev/null +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad4695.yaml @@ -0,0 +1,297 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/iio/adc/adi,ad4695.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Analog Devices Easy Drive Multiplexed SAR Analog to Digital Converters + +maintainers: + - Michael Hennerich + - Nuno Sá + +description: | + A family of similar multi-channel analog to digital converters with SPI bus. + + * https://www.analog.com/en/products/ad4695.html + * https://www.analog.com/en/products/ad4696.html + * https://www.analog.com/en/products/ad4697.html + * https://www.analog.com/en/products/ad4698.html + +$ref: /schemas/spi/spi-peripheral-props.yaml# + +properties: + compatible: + oneOf: + - enum: + - adi,ad4695 + - adi,ad4697 + # same chips in WLCSP package with more pins + - items: + - const: adi,ad4695-wlcsp + - const: adi,ad4695 + - items: + - const: adi,ad4697-wlcsp + - const: adi,ad4697 + # same chips with higher max sample rate + - items: + - const: adi,ad4696 + - const: adi,ad4695 + - items: + - const: adi,ad4698 + - const: adi,ad4697 + # same chips with higher max sample rate in WLCSP package + - items: + - const: adi,ad4696-wlcsp + - const: adi,ad4696 + - const: adi,ad4695-wlcsp + - const: adi,ad4695 + - items: + - const: adi,ad4698-wlcsp + - const: adi,ad4698 + - const: adi,ad4697-wlcsp + - const: adi,ad4697 + + reg: + maxItems: 1 + + spi-max-frequency: + maximum: 80000000 + + spi-cpol: true + spi-cpha: true + + spi-rx-bus-width: + minimum: 1 + maximum: 4 + + avdd-supply: + description: A 2.7 V to 5.5 V supply that powers the analog circuitry. + + ldo-in-supply: + description: A 2.4 V to 5.5 V supply connected to the internal LDO input. + + vdd-supply: + description: A 1.8V supply that powers the core circuitry. + + vio-supply: + description: A 1.2V to 1.8V supply for the digital inputs and outputs. + + ref-supply: + description: A 2.4 V to 5.1 V supply for the external reference voltage. + + refin-supply: + description: A 2.4 V to 5.1 V supply for the internal reference buffer input. + + com-supply: + description: Common voltage supply for pseudo-differential analog inputs. + + adi,no-ref-current-limit: + $ref: /schemas/types.yaml#/definitions/flag + description: + When this flag is present, the REF Overvoltage Reduced Current protection + is disabled. + + adi,no-ref-high-z: + $ref: /schemas/types.yaml#/definitions/flag + description: + Enable this flag if the ref-supply requires Reference Input High-Z Mode + to be disabled for proper operation. + + cnv-gpios: + description: The Convert Input (CNV). If omitted, CNV is tied to SPI CS. + maxItems: 1 + + reset-gpios: + description: The Reset Input (RESET). Should be configured GPIO_ACTIVE_LOW. + maxItems: 1 + + interrupts: + minItems: 1 + items: + - description: + Signal coming from the BSY_ALT_GP0 or GP3 pin that indicates a busy + condition. + - description: + Signal coming from the BSY_ALT_GP0 or GP2 pin that indicates an alert + condition. + + interrupt-names: + minItems: 1 + items: + - const: busy + - const: alert + + gpio-controller: true + + "#gpio-cells": + const: 2 + description: | + The first cell is the GPn number: 0 to 3. + The second cell takes standard GPIO flags. + + "#address-cells": + const: 1 + "#size-cells": + const: 0 + +patternProperties: + "^channel@[0-9a-f]$": + type: object + $ref: adc.yaml + unevaluatedProperties: false + description: + Describes each individual channel. In addition the properties defined + below, bipolar from adc.yaml is also supported. + + properties: + reg: + maximum: 15 + description: Input pin number (INx). + + adi,pin-pairing: + description: | + The input pin pairing for the negative input. This can be: + - REFGND, normally 0V (single-ended) + - COM, normally V_REF/2, see com-supply (pseudo-differential) + - For even numbered pins, the next odd numbered pin (differential) + $ref: /schemas/types.yaml#/definitions/string + enum: [refgnd, com, next] + default: refgnd + + adi,no-high-z: + $ref: /schemas/types.yaml#/definitions/flag + description: | + Enable this flag if the input pin requires the Analog Input High-Z + Mode to be disabled for proper operation. + + required: + - reg + + allOf: + # only even number pins can be paired with the next pin + - if: + properties: + reg: + not: + multipleOf: 2 + then: + properties: + adi,pin-pairing: + enum: [refgnd, com] + # bipolar mode is not supported with REFGND pairing + - if: + not: + required: + - adi,pin-pairing + then: + properties: + bipolar: false + else: + if: + properties: + adi,pin-pairing: + const: refgnd + then: + properties: + bipolar: false + +required: + - compatible + - reg + - avdd-supply + - vio-supply + +allOf: + - oneOf: + - required: + - ref-supply + - required: + - refin-supply + + - oneOf: + - required: + - ldo-in-supply + - required: + - vdd-supply + + # LFSCP package has fewer pins, so a few things are not valid in that case + - if: + properties: + compatible: + not: + contains: + pattern: -wlcsp$ + then: + properties: + refin-supply: false + spi-rx-bus-width: + maximum: 2 + + # the internal reference buffer always requires high-z mode + - if: + required: + - refin-supply + then: + properties: + adi,no-ref-high-z: false + + # limit channels for 8-channel chips + - if: + properties: + compatible: + contains: + const: adi,ad4697 + then: + patternProperties: + "^channel@[0-7]$": + properties: + reg: + maximum: 7 + "^channel@[8-9a-f]$": false + +unevaluatedProperties: false + +examples: + - | + #include + + spi { + #address-cells = <1>; + #size-cells = <0>; + + adc@0 { + compatible = "adi,ad4695"; + reg = <0>; + spi-cpol; + spi-cpha; + spi-max-frequency = <80000000>; + avdd-supply = <&supply_2_5V>; + vdd-supply = <&supply_1_8V>; + vio-supply = <&supply_1_2V>; + ref-supply = <&supply_5V>; + reset-gpios = <&gpio 1 GPIO_ACTIVE_LOW>; + + #address-cells = <1>; + #size-cells = <0>; + + /* Differential channel between IN0 and IN1. */ + channel@0 { + reg = <0>; + adi,pin-pairing = "next"; + bipolar; + }; + + /* Single-ended channel between IN2 and REFGND. */ + channel@2 { + reg = <2>; + }; + + /* Pseudo-differential channel between IN3 and COM. */ + channel@f { + reg = <3>; + adi,pin-pairing = "com"; + bipolar; + }; + }; + }; diff --git a/MAINTAINERS b/MAINTAINERS index c870bc6b8d63..8d15e4089d7c 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1209,6 +1209,15 @@ 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 AD4695 DRIVER +M: Michael Hennerich +M: Nuno Sá +R: David Lechner +L: linux-iio@vger.kernel.org +S: Supported +W: https://ez.analog.com/linux-software-drivers +F: Documentation/devicetree/bindings/iio/adc/adi,ad4695.yaml + ANALOG DEVICES INC AD7091R DRIVER M: Marcelo Schmitt L: linux-iio@vger.kernel.org