From patchwork Mon Sep 14 15:48:04 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Baryshkov X-Patchwork-Id: 292870 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=-12.8 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=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 3DFC8C433E2 for ; Mon, 14 Sep 2020 15:57:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EBA7D20756 for ; Mon, 14 Sep 2020 15:57:24 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="NDjOuKuq" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726296AbgINP5T (ORCPT ); Mon, 14 Sep 2020 11:57:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50290 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726239AbgINPsd (ORCPT ); Mon, 14 Sep 2020 11:48:33 -0400 Received: from mail-lf1-x143.google.com (mail-lf1-x143.google.com [IPv6:2a00:1450:4864:20::143]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 259BDC061220 for ; Mon, 14 Sep 2020 08:48:31 -0700 (PDT) Received: by mail-lf1-x143.google.com with SMTP id x69so13974680lff.3 for ; Mon, 14 Sep 2020 08:48:31 -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=NDjOuKuq0ir6imwOA3BARFgMik89YDK4R/uxZnkdax0YDfc0nrWUbA7C3SYaWWJjm/ DMOwc5DDkuEKFdcd9o5Qd8M+G2xp8OqqdTDwlu2xVylKW4suTKLoJdbW/cp546payEQg wS9JgwqQFW/LLynwetNH8vHnJuJ/69KtgANHCPx8d447klqqSPGJw1a/ER3nyxeYiwtr Q/SLCMOAP/ZjhXlCX4ozanJpJtmxgBTLYgaSO6oNHNjtdNe5XTnz9h5+ZfNq+kR8Lafe bRcTcf3n2xVZ6x6Ddk2tn99EUePeODiAUfEW7DSJlat1ov/mSzSCWKQ/g/DsgPOIyqUJ QGVQ== 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=Aoqv1vpFpRCBMaixe93vsuEov09X/SM9QaqAHQ5sWV2HDRMLAU9BueXU0SGu0fcM9t GEa4BNQ1vdY8PFY22o4cTp8pBZEyzdT1mWUjoQruY+8lpJyBFE5d5/+/558AfsotcH83 OzJvIsfeAT4X4Bmi03BRL13yq353hd3GeKgxu0il7BmXNwMYnN1pmrX35XYyWFz77XTf nkzdb9n+ifBhoX9Axp4xM3HAVxeT7XG/PABCefp7ya8M/4OGwmcUUTEbkaxjyZjEoFpf gpds1Ipq8W3lSbXlFbau6YA0O5NF7SdUPEHkjByo5ZxxZJEM2iadrczXeUTsGOTFAJgO tw5g== X-Gm-Message-State: AOAM5326KR7wjBvC/4qDRnR1S0+HPMSZnLaJmZciSsMRoDz1kqVftGTC c5vyjFMgSLdm68yowCshgUh+pw== X-Google-Smtp-Source: ABdhPJx8oyBJT0AivzVhkW6/0QdA3t2Lg4Oc9CjKM0/HsAL0AaGJL1UOLAg2Wpj8H8OFw2Ad0Mo+LQ== X-Received: by 2002:ac2:4903:: with SMTP id n3mr4161358lfi.588.1600098509573; Mon, 14 Sep 2020 08:48:29 -0700 (PDT) Received: from eriador.lan ([188.162.64.187]) by smtp.gmail.com with ESMTPSA id f19sm3834650lfs.85.2020.09.14.08.48.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 14 Sep 2020 08:48:28 -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 , Jonathan Cameron Subject: [PATCH v5 4/9] iio: adc: qcom-vadc-common: use fixp_linear_interpolate Date: Mon, 14 Sep 2020 18:48:04 +0300 Message-Id: <20200914154809.192174-5-dmitry.baryshkov@linaro.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200914154809.192174-1-dmitry.baryshkov@linaro.org> References: <20200914154809.192174-1-dmitry.baryshkov@linaro.org> MIME-Version: 1.0 Sender: linux-arm-msm-owner@vger.kernel.org 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;