From patchwork Wed Sep 30 10:01:57 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Baryshkov X-Patchwork-Id: 249841 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=-13.1 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable 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 E9391C4742B for ; Wed, 30 Sep 2020 10:02:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A94A12074A for ; Wed, 30 Sep 2020 10:02:32 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="m0zpqotB" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729352AbgI3KCa (ORCPT ); Wed, 30 Sep 2020 06:02:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48442 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729326AbgI3KC3 (ORCPT ); Wed, 30 Sep 2020 06:02:29 -0400 Received: from mail-lf1-x141.google.com (mail-lf1-x141.google.com [IPv6:2a00:1450:4864:20::141]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 57FD1C061755 for ; Wed, 30 Sep 2020 03:02:29 -0700 (PDT) Received: by mail-lf1-x141.google.com with SMTP id 77so1428142lfj.0 for ; Wed, 30 Sep 2020 03:02:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=SyrNRlrzgocwFtm4m1D+vgyjZWlJZcz7p/Dz+/oWD3I=; b=m0zpqotBVnmz/7C8jVSYyhqZBMEXJh33+flGjkdUOMwY+pgk0H+RmC2MBTAIFR3JRo CHWqmgecP0Qv0I/S7mtJLJxoNK91cr33eDtF7KO75/f1K0vuwtuZ5SwyGmGa7GsMqYgY hjaNrynyfZ42TSGgRaiM+UkCOAUcKWJVa+Pud+OZjbay3TBKBmTpp2/JkUXaCGykRORG VwSIcFz25PnTj8FkpIhrWtXpwV0djWXXs/MNnS85wSy7h8gyFyTlVqno1b7/XqcukJea uJOG7J2FiJZK+qd4mwUM71jT9a6Ezn99yPMBzge7LSFhrD+pLrSUq4MiKAwpNAOzQQuM zZkA== 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=SyrNRlrzgocwFtm4m1D+vgyjZWlJZcz7p/Dz+/oWD3I=; b=UwubmIO7MNDQQdfjatAUkcwQ7K5aVR1TzxQziU4BmJZ7UQbjn/hAgkfX3203iit+AD XadHxHgj7nl6HvCwf8B2/LJFUhP3GkzipWapxs02N5jFwo/snuDX1Udn/aAiUX30z6e0 6xR20S5O7unz0iWsDOY5srvmWhsLB1GkHTCasNQFltILAMmdocqG1r01qGT2JiDwYjZi CCckFlmryn9WfV1vWYh0E1YM/S1fSXwUwASlFw/rT6apOrfRhh699ZGv8IYvPt6szBxP E5jU/dH5y8KoFBWfnkotIBN167HHarvicTJlCBVeIrjQpfVfRgWwc273uUmqVoFnQeEs UTVg== X-Gm-Message-State: AOAM531+OHyvOAOiM6xuwbydBpEaqys3xi6wyqLxN2ofu2WnEh/jHNwO jPRB5Xo/cPRBbQnTpS+Hm4e+Zw== X-Google-Smtp-Source: ABdhPJwddXc4gkJLT7lTD9hdiCEYhG7SQmgB2Cj8256KwRtnod2YQUHDzOCUT1H2Gg/oNINWXTFqGQ== X-Received: by 2002:a19:8c03:: with SMTP id o3mr550531lfd.349.1601460147807; Wed, 30 Sep 2020 03:02:27 -0700 (PDT) Received: from eriador.lan ([188.162.64.138]) by smtp.gmail.com with ESMTPSA id w4sm132479lff.231.2020.09.30.03.02.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 30 Sep 2020 03:02:27 -0700 (PDT) From: Dmitry Baryshkov To: Andy Gross , Bjorn Andersson , Rob Herring , Zhang Rui , Daniel Lezcano , Amit Kucheria , Jonathan Cameron , Hartmut Knaack , Lars-Peter Clausen , Peter Meerwald-Stadler Cc: linux-arm-msm@vger.kernel.org, linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-iio@vger.kernel.org, Manivannan Sadhasivam , Jishnu Prakash , Jonathan Cameron Subject: [PATCH v6 04/10] iio: adc: qcom-vadc-common: use fixp_linear_interpolate Date: Wed, 30 Sep 2020 13:01:57 +0300 Message-Id: <20200930100203.1988374-5-dmitry.baryshkov@linaro.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200930100203.1988374-1-dmitry.baryshkov@linaro.org> References: <20200930100203.1988374-1-dmitry.baryshkov@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Use new function fixp_linear_interpolate() instead of hand-coding the linear interpolation. Signed-off-by: Dmitry Baryshkov Reviewed-by: Jonathan Cameron --- drivers/iio/adc/qcom-vadc-common.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/iio/adc/qcom-vadc-common.c b/drivers/iio/adc/qcom-vadc-common.c index d11f3343ad52..40d77b3af1bb 100644 --- a/drivers/iio/adc/qcom-vadc-common.c +++ b/drivers/iio/adc/qcom-vadc-common.c @@ -2,6 +2,7 @@ #include #include #include +#include #include #include #include @@ -368,10 +369,9 @@ static int qcom_vadc_map_voltage_temp(const struct vadc_map_pt *pts, } else { /* result is between search_index and search_index-1 */ /* interpolate linearly */ - *output = (((s32)((pts[i].y - pts[i - 1].y) * - (input - pts[i - 1].x)) / - (pts[i].x - pts[i - 1].x)) + - pts[i - 1].y); + *output = fixp_linear_interpolate(pts[i - 1].x, pts[i - 1].y, + pts[i].x, pts[i].y, + input); } return 0;