From patchwork Mon May 8 13:13:40 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stephan Gerhold X-Patchwork-Id: 680012 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 30FF3C77B75 for ; Mon, 8 May 2023 13:37:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233880AbjEHNhS (ORCPT ); Mon, 8 May 2023 09:37:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53550 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233170AbjEHNhR (ORCPT ); Mon, 8 May 2023 09:37:17 -0400 X-Greylist: delayed 1353 seconds by postgrey-1.37 at lindbergh.monkeyblade.net; Mon, 08 May 2023 06:37:12 PDT Received: from mx.kernkonzept.com (serv1.kernkonzept.com [IPv6:2a01:4f8:1c1c:b490::2]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5CBC233169; Mon, 8 May 2023 06:37:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=kernkonzept.com; s=mx1; h=Cc:To:In-Reply-To:References:Message-Id: Content-Transfer-Encoding:Content-Type:MIME-Version:Subject:Date:From:Sender: Reply-To:Content-ID:Content-Description; bh=mOseTxwGsFqvCCOX46fJqAaMaCn90Qk+xtOVYSA8awE=; b=Dk032G458xZecq5cd3P+eY/iVo qXHdks3fPPt/PslF/Qvqsmi4Jeywm7kDHGumpRItgfXF22yIjJAVXHB7+bp2NGa1AsDvpbrypbNlj x8o2hRsmX0DMSto1AObec6EsFMyiPFOeQACKB256dckq8IRmXbwMlr8XZTeWbQ58jCfLFUGBRx3J5 l037XXKq7XLiOWu8AqGlnyAjLaEklpYTwmOWYE3KTnfTLyAL86R//EL1n3beCStZUBHoxfDNMvG25 eZQxtZtU+q0piduR4Pgcp6sKETOme+3wwUS3qfKExHyyzOkdcZ4IC5yykAxZ8kb5G6zHpHfy3Pm/v F5UjxM+w==; Received: from [10.22.3.24] (helo=serv1.dd1.int.kernkonzept.com) by mx.kernkonzept.com with esmtpsa (TLS1.3:ECDHE_X25519__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim 4.94.2) id 1pw0hN-009LZn-Db; Mon, 08 May 2023 15:14:41 +0200 From: Stephan Gerhold Date: Mon, 08 May 2023 15:13:40 +0200 Subject: [PATCH v4 3/6] thermal: qcom: tsens-v0_1: Add mdm9607 correction offsets MIME-Version: 1.0 Message-Id: <20230508-msm8909-tsens-v4-3-d9119622cb19@kernkonzept.com> References: <20230508-msm8909-tsens-v4-0-d9119622cb19@kernkonzept.com> In-Reply-To: <20230508-msm8909-tsens-v4-0-d9119622cb19@kernkonzept.com> To: Daniel Lezcano Cc: Amit Kucheria , Thara Gopinath , Andy Gross , Bjorn Andersson , Konrad Dybcio , "Rafael J. Wysocki" , Zhang Rui , Dmitry Baryshkov , Rob Herring , Krzysztof Kozlowski , Conor Dooley , linux-arm-msm@vger.kernel.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Stephan Gerhold X-Mailer: b4 0.12.2 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org According to the msm-3.18 vendor kernel from Qualcomm, mdm9607 needs "correction factors" to adjust for additional offsets observed after the factory calibration values in the fuses [1, 2]. The fixed offsets should be applied unless there is a special calibration mode value that indicates that no offsets are needed [3]. Note that the new calibration mode values are called differently in this patch compared to the vendor kernel: - TSENS_TWO_POINT_CALIB_N_WA -> ONE_PT_CALIB2_NO_OFFSET - TSENS_TWO_POINT_CALIB_N_OFFSET_WA -> TWO_PT_CALIB_NO_OFFSET This is because close inspection of the calibration function [3] reveals that TSENS_TWO_POINT_CALIB_N_WA is actually a "one point" calibration because the if statements skip all "point2" related code for it. [1]: https://git.codelinaro.org/clo/la/kernel/msm-3.18/-/commit/d9d2db1b82bf3f72f5de0803d55e6849eb5b671e [2]: https://git.codelinaro.org/clo/la/kernel/msm-3.18/-/commit/d75aef53a760e8ff7bac54049d00c8b2ee1b193e [3]: https://git.codelinaro.org/clo/la/kernel/msm-3.18/-/blob/LE.UM.4.3.2.r1-04200-9x07/drivers/thermal/msm-tsens.c#L2987-3136 Fixes: a2149ab815fc ("thermal/drivers/qcom/tsens-v0_1: Add support for MDM9607") Reviewed-by: Konrad Dybcio Signed-off-by: Stephan Gerhold --- drivers/thermal/qcom/tsens-v0_1.c | 11 +++++++++++ drivers/thermal/qcom/tsens.c | 16 +++++++++++++++- drivers/thermal/qcom/tsens.h | 4 ++++ 3 files changed, 30 insertions(+), 1 deletion(-) diff --git a/drivers/thermal/qcom/tsens-v0_1.c b/drivers/thermal/qcom/tsens-v0_1.c index 1b454de3928d..e69889dd524a 100644 --- a/drivers/thermal/qcom/tsens-v0_1.c +++ b/drivers/thermal/qcom/tsens-v0_1.c @@ -229,6 +229,17 @@ static int __init init_9607(struct tsens_priv *priv) for (i = 0; i < priv->num_sensors; ++i) priv->sensor[i].slope = 3000; + priv->sensor[0].p1_calib_offset = 1; + priv->sensor[0].p2_calib_offset = 1; + priv->sensor[1].p1_calib_offset = -4; + priv->sensor[1].p2_calib_offset = -2; + priv->sensor[2].p1_calib_offset = 4; + priv->sensor[2].p2_calib_offset = 8; + priv->sensor[3].p1_calib_offset = -3; + priv->sensor[3].p2_calib_offset = -5; + priv->sensor[4].p1_calib_offset = -4; + priv->sensor[4].p2_calib_offset = -4; + return init_common(priv); } diff --git a/drivers/thermal/qcom/tsens.c b/drivers/thermal/qcom/tsens.c index d3218127e617..065d0f9728a5 100644 --- a/drivers/thermal/qcom/tsens.c +++ b/drivers/thermal/qcom/tsens.c @@ -134,10 +134,12 @@ int tsens_read_calibration(struct tsens_priv *priv, int shift, u32 *p1, u32 *p2, p1[i] = p1[i] + (base1 << shift); break; case TWO_PT_CALIB: + case TWO_PT_CALIB_NO_OFFSET: for (i = 0; i < priv->num_sensors; i++) p2[i] = (p2[i] + base2) << shift; fallthrough; case ONE_PT_CALIB2: + case ONE_PT_CALIB2_NO_OFFSET: for (i = 0; i < priv->num_sensors; i++) p1[i] = (p1[i] + base1) << shift; break; @@ -149,6 +151,18 @@ int tsens_read_calibration(struct tsens_priv *priv, int shift, u32 *p1, u32 *p2, } } + /* Apply calibration offset workaround except for _NO_OFFSET modes */ + switch (mode) { + case TWO_PT_CALIB: + for (i = 0; i < priv->num_sensors; i++) + p2[i] += priv->sensor[i].p2_calib_offset; + fallthrough; + case ONE_PT_CALIB2: + for (i = 0; i < priv->num_sensors; i++) + p1[i] += priv->sensor[i].p1_calib_offset; + break; + } + return mode; } @@ -254,7 +268,7 @@ void compute_intercept_slope(struct tsens_priv *priv, u32 *p1, if (!priv->sensor[i].slope) priv->sensor[i].slope = SLOPE_DEFAULT; - if (mode == TWO_PT_CALIB) { + if (mode == TWO_PT_CALIB || mode == TWO_PT_CALIB_NO_OFFSET) { /* * slope (m) = adc_code2 - adc_code1 (y2 - y1)/ * temp_120_degc - temp_30_degc (x2 - x1) diff --git a/drivers/thermal/qcom/tsens.h b/drivers/thermal/qcom/tsens.h index dba9cd38f637..880be6be5c3f 100644 --- a/drivers/thermal/qcom/tsens.h +++ b/drivers/thermal/qcom/tsens.h @@ -10,6 +10,8 @@ #define ONE_PT_CALIB 0x1 #define ONE_PT_CALIB2 0x2 #define TWO_PT_CALIB 0x3 +#define ONE_PT_CALIB2_NO_OFFSET 0x6 +#define TWO_PT_CALIB_NO_OFFSET 0x7 #define CAL_DEGC_PT1 30 #define CAL_DEGC_PT2 120 #define SLOPE_FACTOR 1000 @@ -57,6 +59,8 @@ struct tsens_sensor { unsigned int hw_id; int slope; u32 status; + int p1_calib_offset; + int p2_calib_offset; }; /**