From patchwork Mon Jun 7 14:47:15 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Liam Beguin X-Patchwork-Id: 12303689 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=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 E282DC47082 for ; Mon, 7 Jun 2021 14:48:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C58B361130 for ; Mon, 7 Jun 2021 14:48:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230266AbhFGOuZ (ORCPT ); Mon, 7 Jun 2021 10:50:25 -0400 Received: from mail-qk1-f169.google.com ([209.85.222.169]:37642 "EHLO mail-qk1-f169.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230197AbhFGOuY (ORCPT ); Mon, 7 Jun 2021 10:50:24 -0400 Received: by mail-qk1-f169.google.com with SMTP id i67so16874498qkc.4; Mon, 07 Jun 2021 07:48:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=7v4978NXelKHLOHpzJWizqDsRLeauX49Rk0ajigt3jA=; b=IE3q5YlkLWYhXTA8e0CC0CU20K1q7T1Hbaa39xGmN8/PWletS8rQ2RvN2CRmwiJsbU OmTgoTt4jSSZ1qCyhtdEUbOe3DS1Q2GjBoCTzlaXLnumQBaX4VjC2BKDbHo0Wqt1jSDH 27ofcM3l/qtROtSE2ltTvhV5T860BMAfSaiIzkOaHuwiogrTeREF5mPWGxRRoJR3JQr/ rTuKpEKpTPDNxN4rloIH9zXMwzSxevF2tpLzV58yhD5mQ7gL8O0QN8d9GJpI7qhnjOj+ bS60ZzuxSWL5a0HIL6KnoC00+QY3mVUMWqV5ynQBBEmZIKatTelzQqjkviwtfrEu1owL gyRg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=7v4978NXelKHLOHpzJWizqDsRLeauX49Rk0ajigt3jA=; b=I+6lbaVKv177RcmRQU95Z5P26yslcCEm2N1F++XswmERQDBu6jKfiCGYn9euHoeH2s ZHY1AJq0Pou6isWYDM08WAsHdNy/2oYAf1IvptA+xjsxI7eHOKydRT/Oe7DcAW6KKVVj +2a+NLH1vWdyaCEQUvP1kByrkwxuovQ3iDrPX7Sq5ffC82QbFDxEPkZE6oYV/oifX8t5 BZ1nfZhpzuVDCnlAl5/TEaEaRks6jlPlwCVJvTyCfGo68AERaZnnLMlfBlIoIO3tCunc WT5ROeQjmHpkbM2xrBInVuokk0pb48jzj2SWjQ/ACOsEm6c4jK9e307uL+cPGAJeA7ln TnvA== X-Gm-Message-State: AOAM531tFzWdvu5wRV7kAyilj13GOdmcP2g1oKbT6Z4dvvsqHpmoBvI1 /2eoD1PTF+5LQoW76rAxwTE= X-Google-Smtp-Source: ABdhPJzTQnBmv/Ms1KwliA16vvt9C9QeNZsgjkHO9Anrt/LkoRApNZDYaGBTXA8AX9WZc2kp0TXDeQ== X-Received: by 2002:ae9:f507:: with SMTP id o7mr16734638qkg.384.1623077253142; Mon, 07 Jun 2021 07:47:33 -0700 (PDT) Received: from shaak.xiphos.ca (198-48-202-89.cpe.pppoe.ca. [198.48.202.89]) by smtp.gmail.com with ESMTPSA id s7sm4157855qkp.35.2021.06.07.07.47.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Jun 2021 07:47:32 -0700 (PDT) From: Liam Beguin To: liambeguin@gmail.com, peda@axentia.se, jic23@kernel.org, lars@metafoo.de, pmeerw@pmeerw.net Cc: linux-kernel@vger.kernel.org, linux-iio@vger.kernel.org, devicetree@vger.kernel.org, robh+dt@kernel.org Subject: [PATCH v2 5/8] iio: afe: rescale: add upstream offset support Date: Mon, 7 Jun 2021 10:47:15 -0400 Message-Id: <20210607144718.1724413-6-liambeguin@gmail.com> X-Mailer: git-send-email 2.30.1.489.g328c10930387 In-Reply-To: <20210607144718.1724413-1-liambeguin@gmail.com> References: <20210607144718.1724413-1-liambeguin@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org From: Liam Beguin Default to using iio_read_channel_processed() if the upstream channel exposes an offset. When possible, it's preferable to avoid using iio_read_channel_processed() to maintain as much precision as possible. Signed-off-by: Liam Beguin --- drivers/iio/afe/iio-rescale.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/iio/afe/iio-rescale.c b/drivers/iio/afe/iio-rescale.c index 774eb3044edd..e34148d39b39 100644 --- a/drivers/iio/afe/iio-rescale.c +++ b/drivers/iio/afe/iio-rescale.c @@ -148,7 +148,10 @@ static int rescale_configure_channel(struct device *dev, chan->ext_info = rescale->ext_info; chan->type = rescale->cfg->type; - if (iio_channel_has_info(schan, IIO_CHAN_INFO_RAW) || + if (iio_channel_has_info(schan, IIO_CHAN_INFO_OFFSET)) { + dev_info(dev, "found upstream offset, using processed value\n"); + rescale->chan_processed = true; + } else if (iio_channel_has_info(schan, IIO_CHAN_INFO_RAW) || iio_channel_has_info(schan, IIO_CHAN_INFO_SCALE)) { dev_info(dev, "using raw+scale source channel\n"); } else if (iio_channel_has_info(schan, IIO_CHAN_INFO_PROCESSED)) {