From patchwork Sun Dec 4 05:59:05 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Baryshkov X-Patchwork-Id: 632478 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 9EC6DC63704 for ; Sun, 4 Dec 2022 05:59:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229999AbiLDF73 (ORCPT ); Sun, 4 Dec 2022 00:59:29 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49886 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229765AbiLDF7V (ORCPT ); Sun, 4 Dec 2022 00:59:21 -0500 Received: from mail-lf1-x135.google.com (mail-lf1-x135.google.com [IPv6:2a00:1450:4864:20::135]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F00F91A800 for ; Sat, 3 Dec 2022 21:59:19 -0800 (PST) Received: by mail-lf1-x135.google.com with SMTP id p8so13707284lfu.11 for ; Sat, 03 Dec 2022 21:59:19 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=FMZgZgjVy9HPbAmZZqg2krbkTooRWIvWAVZboE7ieT0=; b=j/xS76tWzDnhKGj4jM5QCgwqVfg1q7hbGnZ6ACIQY72F4atFx7j/rf0sm2j+QP7/kD RLPBEmSfDtVqg6MgJR14D9CLmkHn18UYJwduMb3+T8zjGOKxtnKVv3t2F73bkQpNYk0d W7BDGscTFR7MddMHSauLf+o/P6kyVZsAAuFGmKIpMJVi5M+Oozas/BhWdhgGEvDR+TQ/ LpwOiky9ajOTGFT4C4QBR/pFsQjsWwvlw0oC88Qqv0O7wD3zkWY/HUa2h86e2yfnXU+Y yOpAva8OSv1ncae6+mN8MkIsyECTW9153w/3VBRYIlllPT9K/Yvo/d+L972/UQL32Ptl WIBg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=FMZgZgjVy9HPbAmZZqg2krbkTooRWIvWAVZboE7ieT0=; b=CDfUc8X00NTa2pJThB0nKaN3kzLrX8hDFf6pzkzybcpylCLE71BUJvJ1A+aSGH4FoC bg5f/ERthXzgal/6r2dJfZx+ow5t9oaHNo4LAuj3i6gvFIfoD5qU+WX2HyjriSDwba+J bRe/KNEwGnVVA7KzXTo/kaigEvFBR54CRyvh/blDyRUjZ4j3qHAGYyQa/ZpkaQBMzrhu 1YrlzQ9L30k2kHHAGmam9WB/OUYVlEJg0SmwHLo+KMOe9fVd9A0Sl75hwZYbqIGqVqJc Acm1W9GxDKaVhLvMVWp/A7X08N+9iSg071H/zSRUnHGMCoKIttZxt+b0lqe70cEgaLlW Y1uA== X-Gm-Message-State: ANoB5pmHETPFvYTogCD6g8lWC+0ZgsNATtTPxSRL6nmNtnF2O9hadWHv 9AqL3U0FKwOPgLSQLlEiXbF5CPBXGVg0UAYf X-Google-Smtp-Source: AA0mqf6PVnNCQcAQpSPdc4swsCu8ku/+srsX9jHDkrSp+mSqj4KswtZS6V4M4FmdOEJug6zhtRriRQ== X-Received: by 2002:a05:6512:683:b0:4b4:eadc:5b53 with SMTP id t3-20020a056512068300b004b4eadc5b53mr19450900lfe.156.1670133559514; Sat, 03 Dec 2022 21:59:19 -0800 (PST) Received: from eriador.lan ([37.153.55.125]) by smtp.gmail.com with ESMTPSA id o6-20020a05651205c600b004917a30c82bsm1650028lfo.153.2022.12.03.21.59.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 03 Dec 2022 21:59:19 -0800 (PST) From: Dmitry Baryshkov To: Andy Gross , Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Amit Kucheria , Thara Gopinath , "Rafael J. Wysocki" , Daniel Lezcano , Zhang Rui Cc: linux-arm-msm@vger.kernel.org, linux-pm@vger.kernel.org, devicetree@vger.kernel.org Subject: [PATCH v2 11/15] thermal/drivers/tsens: Support using nvmem cells for msm8974 calibration Date: Sun, 4 Dec 2022 07:59:05 +0200 Message-Id: <20221204055909.1351895-12-dmitry.baryshkov@linaro.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20221204055909.1351895-1-dmitry.baryshkov@linaro.org> References: <20221204055909.1351895-1-dmitry.baryshkov@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org MSM8974 has two sets of calibration data: main one and backup. Add support for parsing both sets of calibration data from nvmem cells. Signed-off-by: Dmitry Baryshkov --- drivers/thermal/qcom/tsens-v0_1.c | 50 +++++++++++++++++++++++++++++++ drivers/thermal/qcom/tsens.c | 39 +++++++++++++++++++----- drivers/thermal/qcom/tsens.h | 1 + 3 files changed, 82 insertions(+), 8 deletions(-) diff --git a/drivers/thermal/qcom/tsens-v0_1.c b/drivers/thermal/qcom/tsens-v0_1.c index c84abe9b4299..7bb759bad248 100644 --- a/drivers/thermal/qcom/tsens-v0_1.c +++ b/drivers/thermal/qcom/tsens-v0_1.c @@ -3,6 +3,7 @@ * Copyright (c) 2015, The Linux Foundation. All rights reserved. */ +#include #include #include "tsens.h" @@ -194,6 +195,50 @@ static int calibrate_8916(struct tsens_priv *priv) return 0; } +static int calibrate_8974_nvmem(struct tsens_priv *priv) +{ + int i, ret, mode; + u32 p1[11], p2[11]; + u32 backup; + + ret = nvmem_cell_read_variable_le_u32(priv->dev, "use_backup", &backup); + if (ret == -ENOENT) + dev_warn(priv->dev, "Please migrate to separate nvmem cells for calibration data\n"); + if (ret < 0) + return ret; + + mode = tsens_read_calibration(priv, 2, p1, p2, backup == BKP_SEL); + if (mode < 0) + return mode; + + if (mode == NO_PT_CALIB) { + p1[0] += 2; + p1[1] += 9; + p1[2] += 3; + p1[3] += 9; + p1[4] += 5; + p1[5] += 9; + p1[6] += 7; + p1[7] += 10; + p1[8] += 8; + p1[9] += 9; + p1[10] += 8; + } else { + for (i = 0; i < priv->num_sensors; i++) { + /* + * ONE_PT_CALIB requires using addition here instead of + * using OR operation. + */ + p1[i] += BIT_APPEND; + p2[i] += BIT_APPEND; + } + } + + compute_intercept_slope(priv, p1, p2, mode); + + return 0; +} + static int calibrate_8974(struct tsens_priv *priv) { int base1 = 0, base2 = 0, i; @@ -201,6 +246,11 @@ static int calibrate_8974(struct tsens_priv *priv) int mode = 0; u32 *calib, *bkp; u32 calib_redun_sel; + int ret; + + ret = calibrate_8974_nvmem(priv); + if (ret == 0) + return 0; calib = (u32 *)qfprom_read(priv->dev, "calib"); if (IS_ERR(calib)) diff --git a/drivers/thermal/qcom/tsens.c b/drivers/thermal/qcom/tsens.c index 9f1f9ca7963d..888c334c0467 100644 --- a/drivers/thermal/qcom/tsens.c +++ b/drivers/thermal/qcom/tsens.c @@ -70,18 +70,21 @@ char *qfprom_read(struct device *dev, const char *cname) return ret; } -int tsens_calibrate_nvmem(struct tsens_priv *priv, int shift) +int tsens_read_calibration(struct tsens_priv *priv, int shift, u32 *p1, u32 *p2, bool backup) { u32 mode; u32 base1, base2; - u32 p1[MAX_SENSORS], p2[MAX_SENSORS]; - char name[] = "sXX_pY"; /* s10_p1 */ + char name[] = "sXX_pY_backup"; /* s10_p1_backup */ int i, ret; if (priv->num_sensors > MAX_SENSORS) return -EINVAL; - ret = nvmem_cell_read_variable_le_u32(priv->dev, "mode", &mode); + ret = snprintf(name, sizeof(name), "mode%s", backup ? "_backup" : ""); + if (ret < 0) + return ret; + + ret = nvmem_cell_read_variable_le_u32(priv->dev, name, &mode); if (ret == -ENOENT) dev_warn(priv->dev, "Please migrate to separate nvmem cells for calibration data\n"); if (ret < 0) @@ -89,16 +92,24 @@ int tsens_calibrate_nvmem(struct tsens_priv *priv, int shift) dev_dbg(priv->dev, "calibration mode is %d\n", mode); - ret = nvmem_cell_read_variable_le_u32(priv->dev, "base1", &base1); + ret = snprintf(name, sizeof(name), "base1%s", backup ? "_backup" : ""); + if (ret < 0) + return ret; + + ret = nvmem_cell_read_variable_le_u32(priv->dev, name, &base1); + if (ret < 0) + return ret; + + ret = snprintf(name, sizeof(name), "base2%s", backup ? "_backup" : ""); if (ret < 0) return ret; - ret = nvmem_cell_read_variable_le_u32(priv->dev, "base2", &base2); + ret = nvmem_cell_read_variable_le_u32(priv->dev, name, &base2); if (ret < 0) return ret; for (i = 0; i < priv->num_sensors; i++) { - ret = snprintf(name, sizeof(name), "s%d_p1", i); + ret = snprintf(name, sizeof(name), "s%d_p1%s", i, backup ? "_backup" : ""); if (ret < 0) return ret; @@ -106,7 +117,7 @@ int tsens_calibrate_nvmem(struct tsens_priv *priv, int shift) if (ret) return ret; - ret = snprintf(name, sizeof(name), "s%d_p2", i); + ret = snprintf(name, sizeof(name), "s%d_p2%s", i, backup ? "_backup" : ""); if (ret < 0) return ret; @@ -136,6 +147,18 @@ int tsens_calibrate_nvmem(struct tsens_priv *priv, int shift) } } + return mode; +} + +int tsens_calibrate_nvmem(struct tsens_priv *priv, int shift) +{ + u32 p1[MAX_SENSORS], p2[MAX_SENSORS]; + int mode; + + mode = tsens_read_calibration(priv, shift, p1, p2, false); + if (mode < 0) + return mode; + compute_intercept_slope(priv, p1, p2, mode); return 0; diff --git a/drivers/thermal/qcom/tsens.h b/drivers/thermal/qcom/tsens.h index 8d1b83acdb95..c79e1e9783eb 100644 --- a/drivers/thermal/qcom/tsens.h +++ b/drivers/thermal/qcom/tsens.h @@ -579,6 +579,7 @@ struct tsens_priv { }; char *qfprom_read(struct device *dev, const char *cname); +int tsens_read_calibration(struct tsens_priv *priv, int shift, u32 *p1, u32 *p2, bool backup); int tsens_calibrate_nvmem(struct tsens_priv *priv, int shift); int tsens_calibrate_common(struct tsens_priv *priv); void compute_intercept_slope(struct tsens_priv *priv, u32 *pt1, u32 *pt2, u32 mode);