From patchwork Tue Apr 19 09:35:05 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Cosmin Tanislav X-Patchwork-Id: 563536 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8578BC433FE for ; Tue, 19 Apr 2022 09:36:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1348179AbiDSJim (ORCPT ); Tue, 19 Apr 2022 05:38:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38882 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1350350AbiDSJik (ORCPT ); Tue, 19 Apr 2022 05:38:40 -0400 Received: from mail-ej1-x62c.google.com (mail-ej1-x62c.google.com [IPv6:2a00:1450:4864:20::62c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 96E831B78B; Tue, 19 Apr 2022 02:35:55 -0700 (PDT) Received: by mail-ej1-x62c.google.com with SMTP id r13so31680966ejd.5; Tue, 19 Apr 2022 02:35:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=DzznzN6//5u0Id/oxKym5EKV3NbLyKjwGRDtfrCzzlU=; b=YMEOnJAS2K1OHPl7cOhmbdyYORK26A/lJHyRSWqMYYZ4wqstrAWc+wo/csL57KNFkk 7/5GKw/F85m23xvYw/zPIb6IHahei91Q7MbvOHTiwwo0UjcbImYQEfEGKNP6jK84xwPA ECbV759hE4YnSaGfRLWUkqFEZKfScpa8cDeugMgeXAPazmXYhlE350i4ilIwDoa7wCL2 Vi/HtvyjbVj1ynGBfHrcz8WcQtKNz3a+KVfWd8qW+UPJ+irUa7E4haKQJWoVHvRilkrd JEuiEui/rjjbVa9eYcDNDj0JDq/+Ke7hS8ny8ydgZ2H9D9yGz6i1HMdZ5mzf+snIpTeg c2Nw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=DzznzN6//5u0Id/oxKym5EKV3NbLyKjwGRDtfrCzzlU=; b=gN7W46iz7CyAKq/KebRUyvteYGEDBa3vmezV1pApIgkrx0hn8/6FBXy/xg/StNW1M8 jWbLHJSg4F4LlNZh9Q2bVF6Mn5gme+043EW1JVdcDd6s+FPXCdRQJOTYFCLbVirSVQG4 bsgGyBp2gAczVFfmTwbfnvwutVDlwsnabBnvaVU7u83PH3CMl/araN4Q7HXWxDSb/nA/ axuOwWcpdwNZPXujuUNF7fRkTP6h4sc/HFVvH+xMeyFtWtYlC9eCazTG+bDc3Iie0FlY e/TswVn0wJFKKfwcvr1ngi64z6lmwke/YPDKU3xkT0EV0QdYRfFu0H3B4qVkTU/UPAPd dE5A== X-Gm-Message-State: AOAM531EEhh0T/Juf2kzIiy1JoiBSVlLTUXO0ZbHHaLkTle/XJlBwk8s jja4r6n50kQNr0DE8cExfNCjxNg2NQ4= X-Google-Smtp-Source: ABdhPJwkMKonpWLwycJltNiLyL0ezYz9HUwvYP0/n0lFa4EviJ/muqhdBeFxuQvUUxoudABAK8WJxg== X-Received: by 2002:a17:906:4fc3:b0:6e0:66a5:d59c with SMTP id i3-20020a1709064fc300b006e066a5d59cmr12404206ejw.131.1650360954084; Tue, 19 Apr 2022 02:35:54 -0700 (PDT) Received: from demon-pc.localdomain ([188.24.22.234]) by smtp.gmail.com with ESMTPSA id u25-20020a170906b11900b006e08588afedsm5467198ejy.132.2022.04.19.02.35.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 19 Apr 2022 02:35:53 -0700 (PDT) From: Cosmin Tanislav X-Google-Original-From: Cosmin Tanislav Cc: Jonathan Cameron , Rob Herring , Linus Walleij , linux-iio@vger.kernel.org, linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Cosmin Tanislav Subject: [PATCH v2 1/2] dt-bindings: iio: adc: add AD4130 Date: Tue, 19 Apr 2022 12:35:05 +0300 Message-Id: <20220419093506.135553-2-cosmin.tanislav@analog.com> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20220419093506.135553-1-cosmin.tanislav@analog.com> References: <20220419093506.135553-1-cosmin.tanislav@analog.com> MIME-Version: 1.0 To: unlisted-recipients:; (no To-header on input) Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org AD4130-8 is an ultra-low power, high precision, measurement solution for low bandwidth battery operated applications. The fully integrated AFE (Analog Front-End) includes a multiplexer for up to 16 single-ended or 8 differential inputs, PGA (Programmable Gain Amplifier), 24-bit Sigma-Delta ADC, on-chip reference and oscillator, selectable filter options, smart sequencer, sensor biasing and excitation options, diagnostics, and a FIFO buffer. Signed-off-by: Cosmin Tanislav --- .../bindings/iio/adc/adi,ad4130.yaml | 263 ++++++++++++++++++ 1 file changed, 263 insertions(+) create mode 100644 Documentation/devicetree/bindings/iio/adc/adi,ad4130.yaml diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad4130.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad4130.yaml new file mode 100644 index 000000000000..bf1d2a36b6a7 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad4130.yaml @@ -0,0 +1,263 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +# Copyright 2022 Analog Devices Inc. +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/iio/adc/adi,ad4130.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Analog Devices AD4130 ADC device driver + +maintainers: + - Cosmin Tanislav + +description: | + Bindings for the Analog Devices AD4130 ADC. Datasheet can be found here: + https://www.analog.com/media/en/technical-documentation/data-sheets/AD4130-8.pdf + +properties: + compatible: + enum: + - adi,ad4130-8-16-lfcsp + - adi,ad4130-8-16-wlcsp + - adi,ad4130-8-24-lfcsp + - adi,ad4130-8-24-wlcsp + + reg: + maxItems: 1 + + clocks: + maxItems: 1 + description: phandle to the master clock (mclk) + + clock-names: + items: + - const: mclk + + interrupts: + maxItems: 1 + + interrupt-names: + description: | + Specify which interrupt pin should be configured as Data Ready / FIFO + interrupt. + Default if not supplied is dout-int. + enum: + - dout-int + - clk + - p2 + - dout + + '#address-cells': + const: 1 + + '#size-cells': + const: 0 + + refin1-supply: + description: refin1 supply. Can be used as reference for conversion. + + refin2-supply: + description: refin2 supply. Can be used as reference for conversion. + + avdd-supply: + description: AVDD voltage supply. Can be used as reference for conversion. + + iovdd-supply: + description: IOVDD voltage supply. Used for the chip interface. + + spi-max-frequency: + maximum: 5000000 + + adi,int-clk-out: + description: Specify if the internal clock should be exposed on the CLK pin. + type: boolean + + adi,ext-clk-freq: + description: Specify the frequency of the external clock. + $ref: /schemas/types.yaml#/definitions/uint32 + enum: [76800, 153600] + default: 76800 + + adi,bipolar: + description: Specify if the device should be used in bipolar mode. + type: boolean + + adi,vbias-pins: + description: Analog inputs to apply a voltage bias of (AVDD − AVSS) / 2 to. + $ref: /schemas/types.yaml#/definitions/uint32-array + maxItems: 16 + items: + minimum: 0 + maximum: 15 + +required: + - compatible + - reg + - interrupts + +patternProperties: + "^channel@([0-9]|1[0-5])$": + type: object + $ref: adc.yaml + + properties: + reg: + description: | + The channel number. + items: + minimum: 0 + maximum: 15 + + diff-channels: + description: | + Besides the analog inputs available, internal inputs can be used. + 16: Internal temperature sensor. + 17: AVSS + 18: Internal reference + 19: DGND + 20: (AVDD − AVSS)/6+ + 21: (AVDD − AVSS)/6- + 22: (IOVDD − DGND)/6+ + 23: (IOVDD − DGND)/6- + 24: (ALDO − AVSS)/6+ + 25: (ALDO − AVSS)/6- + 26: (DLDO − DGND)/6+ + 27: (DLDO − DGND)/6- + 28: V_MV_P + 29: V_MV_M + $ref: adc.yaml + items: + minimum: 0 + maximum: 29 + + adi,reference-select: + description: | + Select the reference source to use when converting on the + specific channel. Valid values are: + 0: REFIN1(+)/REFIN1(−) + 1: REFIN2(+)/REFIN2(−) + 2: REFOUT/AVSS (Internal reference) + 3: AVDD/AVSS + If not specified, REFIN1 is used. + $ref: /schemas/types.yaml#/definitions/uint32 + enum: [0, 1, 2, 3] + default: 0 + + adi,excitation-pin-0: + description: | + Analog input to apply excitation current to while the channel + is active. + $ref: /schemas/types.yaml#/definitions/uint32 + minimum: 0 + maximum: 15 + default: 0 + + adi,excitation-pin-1: + description: | + Analog input to apply excitation current to while this channel + is active. + $ref: /schemas/types.yaml#/definitions/uint32 + minimum: 0 + maximum: 15 + default: 0 + + adi,excitation-current-0-nanoamps: + description: | + Excitation current in nanoamps to be applied to pin specified in + adi,excitation-pin-0 while this channel is active. + $ref: /schemas/types.yaml#/definitions/uint32 + enum: [0, 100, 10000, 20000, 50000, 100000, 150000, 200000] + default: 0 + + adi,excitation-current-1-nanoamps: + description: | + Excitation current in nanoamps to be applied to pin specified in + adi,excitation-pin-1 while this channel is active. + $ref: /schemas/types.yaml#/definitions/uint32 + enum: [0, 100, 10000, 20000, 50000, 100000, 150000, 200000] + default: 0 + + adi,burnout-current-nanoamps: + description: | + Burnout current in nanoamps to be applied for this channel. + $ref: /schemas/types.yaml#/definitions/uint32 + enum: [0, 500, 2000, 4000] + default: 0 + + adi,buffered-positive: + description: Enable buffered mode for positive input. + type: boolean + + adi,buffered-negative: + description: Enable buffered mode for negative input. + type: boolean + + required: + - reg + - diff-channels + +additionalProperties: false + +examples: + - | + spi { + #address-cells = <1>; + #size-cells = <0>; + + adc@0 { + compatible = "adi,ad4130-8-24-wlcsp"; + reg = <0>; + + #address-cells = <1>; + #size-cells = <0>; + + spi-max-frequency = <5000000>; + interrupts = <27 IRQ_TYPE_EDGE_FALLING>; + interrupt-parent = <&gpio>; + + channel@0 { + reg = <0>; + + adi,reference-select = <2>; + + /* AIN8, AIN9 */ + diff-channels = <8 9>; + }; + + channel@1 { + reg = <1>; + + adi,reference-select = <2>; + + /* AIN10, AIN11 */ + diff-channels = <10 11>; + }; + + channel@2 { + reg = <2>; + + adi,reference-select = <2>; + + /* Temperature Sensor, DGND */ + diff-channels = <16 19>; + }; + + channel@3 { + reg = <3>; + + adi,reference-select = <2>; + + /* Internal reference, DGND */ + diff-channels = <18 19>; + }; + + channel@4 { + reg = <4>; + + adi,reference-select = <2>; + + /* DGND, DGND */ + diff-channels = <19 19>; + }; + }; + };