From patchwork Thu Sep 3 13:21:04 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Baryshkov X-Patchwork-Id: 11753765 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 2E2EA722 for ; Thu, 3 Sep 2020 14:32:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0F5D420722 for ; Thu, 3 Sep 2020 14:32:55 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="oKaX/2FC" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729351AbgICOcI (ORCPT ); Thu, 3 Sep 2020 10:32:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35166 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729347AbgICO1p (ORCPT ); Thu, 3 Sep 2020 10:27:45 -0400 Received: from mail-lj1-x242.google.com (mail-lj1-x242.google.com [IPv6:2a00:1450:4864:20::242]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5DA9FC061238 for ; Thu, 3 Sep 2020 06:21:27 -0700 (PDT) Received: by mail-lj1-x242.google.com with SMTP id w3so3663010ljo.5 for ; Thu, 03 Sep 2020 06:21:27 -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=cQm3Ei3RR3aCnHJxoCJd7GJ9tvCqsDDg7qVL7cbFNi0=; b=oKaX/2FC4xi8AE7Tbxleo6PkivkbjAs99jM9XHwwgd/JkCPtx7AsDJpisNurdXjAML HV3qLDwG7aixk5Sjw9q2R46BnWfN/LmST0aWGeZxQt4xEEs2yXkB7FyD2TKZgNatA9AM s5lQWS3jU7k2pJUW/yF8PzRbyvDQCvzB6zuINPPYkVWfhyMZWDqEniEFtL3QDRGL1iHO hlGIQci4gMdWmernvAlbqwZsZ/TuI6FaqF/63gnR4jLato/32yFOvDFRwVeUbOVGGQNr KyszmvxYZpLU1tQM3ziJ/SvokV1dNgKFnNWoAPcIHD9NeyY9Ss7ArN294b2bL1+hUyMu q3nQ== 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=cQm3Ei3RR3aCnHJxoCJd7GJ9tvCqsDDg7qVL7cbFNi0=; b=BGscyoamfeX8XP1LO6twMsC2Sn1kkvo+R5I4bldimwnh3vuivEIIgn6gG4Sj88+B5C rFzl6l0lafAN8gprWqq2AZhJvy8JmyfCFbSL7dR0MbLK0LW2Nep2uVgYL1SHnivSFLtF znz1dni5kpBC0wXZAl9w1lA07JL3snQrc7fYQXfW01Z7b362SxpHPRDClkbC4y0euqx1 RU3WSI4q7sdDHM1+iwA6ae7zMuEI/RHeetPkN8n124iJfGGWlM5qE8nboXnKEYG5NF2t 4ZHZf6oPGkF1yu52bB7YnMjIeuj9kYuk3ltaePx4Fyldn2KGP8+82eEB2RJvpczQq33u hISA== X-Gm-Message-State: AOAM531qwuwkSScNaNiLKgvVTyhkGZ4PKzxdmSPYq0W3QjkjEhKXWI/D TVTztAYBOIk5eqE6TN0j3Pwu+A== X-Google-Smtp-Source: ABdhPJzjF8ZPvpGo04UHTx/UIh+OfSiygAYlTKZKHI2sYRwiJrGhasv1wAzqFMrbfhl0R4dK4V3fNg== X-Received: by 2002:a2e:9d95:: with SMTP id c21mr1263833ljj.359.1599139285839; Thu, 03 Sep 2020 06:21:25 -0700 (PDT) Received: from eriador.lan ([188.162.64.138]) by smtp.gmail.com with ESMTPSA id e23sm584220lfj.80.2020.09.03.06.21.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 03 Sep 2020 06:21:25 -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 Subject: [PATCH v2 4/9] iio: adc: qcom-vadc-common: use fixp_linear_interpolate Date: Thu, 3 Sep 2020 16:21:04 +0300 Message-Id: <20200903132109.1914011-5-dmitry.baryshkov@linaro.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200903132109.1914011-1-dmitry.baryshkov@linaro.org> References: <20200903132109.1914011-1-dmitry.baryshkov@linaro.org> MIME-Version: 1.0 Sender: linux-iio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org Use new function fixp_linear_interpolate() instead of hand-coding the linar 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;