From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 66829C433E6 for ; Mon, 8 Mar 2021 22:40:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 378696529C for ; Mon, 8 Mar 2021 22:40:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231405AbhCHWjq (ORCPT ); Mon, 8 Mar 2021 17:39:46 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50906 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231228AbhCHWjg (ORCPT ); Mon, 8 Mar 2021 17:39:36 -0500 Received: from mail-ot1-x336.google.com (mail-ot1-x336.google.com [IPv6:2607:f8b0:4864:20::336]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9BB73C06174A; Mon, 8 Mar 2021 14:39:36 -0800 (PST) Received: by mail-ot1-x336.google.com with SMTP id f33so10866928otf.11; Mon, 08 Mar 2021 14:39:36 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=wQvIDGso1RBFZCsL6ixTOcS0Wu2YsU6EKE/ysPX9/4E=; b=ek/lewEGWWKcVBwJKjOEuNn4V/El1kvmO132wgQDs0Nop8NdQDvQwIv9UU4wkRowm4 olbH+1vBxE7emGSmO1gMGYtgdaz3TdxH2VYQm09srJR7Sdz+v6EiYYb5g/TcGZviL4jx Mn61bmIgJ8XnNEUe1t5RhzdRCKJGvZINrNpaTxyy/0H+6DK0H9rTIGxYgGK/em8Ys0S8 Zwxr+tbMU1qRWh7nyOsA4nKhzMVJX4aFkE6LTmgAs1XCQ5GxPuHaOEbxaBxzLYqTHTF+ 0hQ7Y9mVSmCinX/3jtB0GV/gOGOmDH/EKvHpDYlp3MNRapFnJ08V/2EDb0CDIoZ94JLK H2Jw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:from:to:cc:subject:message-id :references:mime-version:content-disposition:in-reply-to:user-agent; bh=wQvIDGso1RBFZCsL6ixTOcS0Wu2YsU6EKE/ysPX9/4E=; b=nuuli23HmweWKlyv1M5Po1dQuzHKxMjXG65tVFLClYYUfb8I4GUdyHcs6fvp2yGf5o LFkDlpwMkDlg8323c0sIzJDgosx9chEzx640+caIh26uFTWe7HUhC94xx6jBtv012vlf NGrgDEvjGEKTJBmVae4LM0jsSB3QdsBkethjcAmC20UFWEZMITNKVpoZgNynW4fH+oDn wGcSc14NvJ3Zzu/NAZ9dS3s+PEexCeUYRohQYhBpock1tq3RjNDDUxRa6A5/OrqIKcUx cDJBGaEUMl42PicBZYi5Q9PqWNlwTiLajZMjXPTbjLpI3DbJn+8B+bV2E20D2hD0okdG ebBA== X-Gm-Message-State: AOAM5304C2zKbgF2pBwsqp75z+8A9Fw8Xd7B/sJxAAYURcRSoW1lI+j/ c0kQlsWwxc9puF+HIlfhnbBIdyGtDc4= X-Google-Smtp-Source: ABdhPJx8XlOlv8RaO6z9FNUkdOHyEa1MxP3s6FTna3PLeU0s6f4ziWS1rVKlVQvp9Mqc9QeAXg4Ncg== X-Received: by 2002:a9d:80e:: with SMTP id 14mr21846215oty.211.1615243175971; Mon, 08 Mar 2021 14:39:35 -0800 (PST) Received: from localhost ([2600:1700:e321:62f0:329c:23ff:fee3:9d7c]) by smtp.gmail.com with ESMTPSA id h24sm33807otg.20.2021.03.08.14.39.34 (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Mon, 08 Mar 2021 14:39:35 -0800 (PST) Sender: Guenter Roeck Date: Mon, 8 Mar 2021 14:39:34 -0800 From: Guenter Roeck To: Chris Packham Cc: "jdelvare@suse.com" , "linux-hwmon@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-i2c@vger.kernel.org" , "linuxppc-dev@lists.ozlabs.org" Subject: Re: Errant readings on LM81 with T2080 SoC Message-ID: <20210308223934.GD185990@roeck-us.net> References: <8e0a88ba-01e9-9bc1-c78b-20f26ce27d12@alliedtelesis.co.nz> <96d660bc-17ab-4e0e-9a94-bce1737a8da1@roeck-us.net> <4a1b1494-df96-2d8c-9323-beb2c2ba706b@alliedtelesis.co.nz> <5709f180-04b5-09b2-e1c4-53eb5c9345d8@roeck-us.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.4 (2018-02-28) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Mar 08, 2021 at 08:27:30PM +0000, Chris Packham wrote: [ ... ] > > Other than that, the only other real idea I have would be to monitor > > the i2c bus. > I am in the fortunate position of being able to go into the office and > even happen to have the expensive scope at the moment. Now I just need > to find a tame HW engineer so I don't burn myself trying to attach the > probes. > A bit unrelated, but you can get scopes connected through usb which are quite low-cost (like in the $100 range) and good enough for i2c testing. Guenter