From patchwork Fri Jul 15 04:49:47 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Cosmin Tanislav X-Patchwork-Id: 12918714 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 A81B1CCA480 for ; Fri, 15 Jul 2022 04:50:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229834AbiGOEuG (ORCPT ); Fri, 15 Jul 2022 00:50:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35030 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229823AbiGOEuE (ORCPT ); Fri, 15 Jul 2022 00:50:04 -0400 Received: from mail-ed1-x529.google.com (mail-ed1-x529.google.com [IPv6:2a00:1450:4864:20::529]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7935078234; Thu, 14 Jul 2022 21:50:03 -0700 (PDT) Received: by mail-ed1-x529.google.com with SMTP id v12so4841702edc.10; Thu, 14 Jul 2022 21:50:03 -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=wbZeiadrifcEaAJ/HfJrwC/UZOFCh8vHpAZw1S7MylQ=; b=Zr5oL0CEjayteYkZC4i9xYUAdH2dVncDJEQ5gVAMzN4IpcygW2bpD7V+w0gUnvGjjn yLFMHms/qvWa1KeDOL1hsmji2ZBNcLWa19zJ8jv/2GCqA1e7yjWQXfiRQ3qkkwYEFeZg Im7pdk/MrDBLQzs0tMezqF+B4fIJb5kRXdSYj+H0GEk2NO9jQDNcbJfOAo3aaeZT4LRh VgR9b1G0WxCSbtqK1bvOYP0kE12ZDlYwQYnVntnzC06wT2E1/NojKrZIQ9pApOIx/P4h fwYEw0LN+ehcYm9LA2tqk0wp+m6m/Eb6NRkNX9nwECEEMw4QV9MJQTFbVS3cT78fZIFY QunA== 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=wbZeiadrifcEaAJ/HfJrwC/UZOFCh8vHpAZw1S7MylQ=; b=c2EEEdSirHlS+0Yfk9idBLqhnGe/uz8r8vFkfjJvla7EEyT/mv5Tt+18Iw6L2VfLLt eEAN4JcolpKgQQQYNZCeyJ7juPnBOuzG8Xo78Ns15CTnc8AiplzNS3XM9wLJKaXEPRGm Ln50L3eFJywsGJG7EIRcaxt4dnFdo3B3BiUbWqan3bXKAhln+6l1wImBDcR3e2tFIcw0 Hf/tjhq48760ntSCJtgVCwNcLAALqMRBBByIen2a5CKaKRF4Q6DGw8FdMbDm/PakYIhL 9zwitd4LL4QYtVlXNVf0GvPOu2GnX//XKtnnd8qr9vfipx1CimtgE5CzTZCsm1AdNSm/ 1DYA== X-Gm-Message-State: AJIora9AbZi7MAz8nk/h+TeOxKQACzTJ2sY/WdbF62jMStdZhQweSEqh kymE17Ub5Lo9DBDTLKWHBj8= X-Google-Smtp-Source: AGRyM1vbq47AOUjAb07TGKZDBrMwNbkEqMbwTo1Hq3nIVZQCfYKMwj980NVxgyBukwCItwT0LC17bg== X-Received: by 2002:a05:6402:2689:b0:43a:dc35:11bb with SMTP id w9-20020a056402268900b0043adc3511bbmr17196700edd.262.1657860602064; Thu, 14 Jul 2022 21:50:02 -0700 (PDT) Received: from demon-pc.localdomain ([79.119.98.153]) by smtp.gmail.com with ESMTPSA id cd2-20020a170906b34200b0072a47b18f7csm1541351ejb.42.2022.07.14.21.50.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 14 Jul 2022 21:50:01 -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 , Rob Herring Subject: [PATCH v8 1/2] dt-bindings: iio: adc: add AD4130 Date: Fri, 15 Jul 2022 07:49:47 +0300 Message-Id: <20220715044948.434149-2-cosmin.tanislav@analog.com> X-Mailer: git-send-email 2.37.0 In-Reply-To: <20220715044948.434149-1-cosmin.tanislav@analog.com> References: <20220715044948.434149-1-cosmin.tanislav@analog.com> MIME-Version: 1.0 To: unlisted-recipients:; (no To-header on input) Precedence: bulk List-ID: X-Mailing-List: linux-iio@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 Reviewed-by: Rob Herring --- .../bindings/iio/adc/adi,ad4130.yaml | 256 ++++++++++++++++++ 1 file changed, 256 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..a3cbb84109c0 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad4130.yaml @@ -0,0 +1,256 @@ +# 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 + + 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 int. + enum: + - 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-hz: + description: Specify the frequency of the external clock. + 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. + $ref: /schemas/types.yaml#/definitions/uint32-array + maxItems: 16 + items: + minimum: 0 + maximum: 15 + +required: + - compatible + - reg + - interrupts + +patternProperties: + "^channel@([0-9a-f])$": + type: object + $ref: adc.yaml + unevaluatedProperties: false + + properties: + reg: + description: The channel number. + 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 + 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-nanoamp: + description: | + Excitation current in nanoamps to be applied to pin specified in + adi,excitation-pin-0 while this channel is active. + enum: [0, 100, 10000, 20000, 50000, 100000, 150000, 200000] + default: 0 + + adi,excitation-current-1-nanoamp: + description: | + Excitation current in nanoamps to be applied to pin specified in + adi,excitation-pin-1 while this channel is active. + enum: [0, 100, 10000, 20000, 50000, 100000, 150000, 200000] + default: 0 + + adi,burnout-current-nanoamp: + description: | + Burnout current in nanoamps to be applied for this channel. + 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: + - | + #include + + spi { + #address-cells = <1>; + #size-cells = <0>; + + adc@0 { + compatible = "adi,ad4130"; + 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>; + }; + }; + };