From patchwork Sun Dec 4 05:59:01 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Baryshkov X-Patchwork-Id: 630921 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 8AA04C636F8 for ; Sun, 4 Dec 2022 05:59:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229935AbiLDF7V (ORCPT ); Sun, 4 Dec 2022 00:59:21 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49734 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229567AbiLDF7S (ORCPT ); Sun, 4 Dec 2022 00:59:18 -0500 Received: from mail-lj1-x22f.google.com (mail-lj1-x22f.google.com [IPv6:2a00:1450:4864:20::22f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 083EB1A38F for ; Sat, 3 Dec 2022 21:59:17 -0800 (PST) Received: by mail-lj1-x22f.google.com with SMTP id z4so9960849ljq.6 for ; Sat, 03 Dec 2022 21:59:16 -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=5OwssKtXg3EJqooC2cqfgJUJeGY1anV9YAhBRxkY5qI=; b=tp+Hpy6abrFbtE6XkhutzDxh2eHpnzOU4svi0G4WsbMQ5/ffhnPFfSWMOdf/8BKHXm 3JfBxoEZ0r1EB/DzaP9MDBsijgPAtdSgA1TkLvumiFauKp1Vg28+3l+DBvMCyAuxpXPI Dem2DIBAmQJgfIxtGZ13wpUc2QQ8gKJK1j+/lmKnpfTP1SsoRfXuk3ICHkH4UHsNhv2B J4eYLFigQRSO3ldw18IoNvADvCNMYVsGch6rH1sl78V846efuaY/mLmXZvDNrxZFLEKE +DjYooOC5hNcBeIoo+asyeTGQN3SMwyhmOLeiL3o+/98akAzWs9sEACLUqBWxezUg4xs e/4g== 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=5OwssKtXg3EJqooC2cqfgJUJeGY1anV9YAhBRxkY5qI=; b=hmG5J+Nc0RuBiz1A01N/9J6/7ae/8dQLMw8stZsHrezXMjdJotbPXRg1h+Fen8gO/y +IjFUAze2OhcfIV5bagNzsGppyj+L+tnWtXzBK8aDkmvWh3WT7MSLC9dBnN0Z2aTb8NN p+fPHxzbFaDHqQAZtnBLgLQEYyKQDWHRTvu/ua5lkMn1/8Ets2Le22BapodUD+cOpzih wW+qayCY5f83kebAFZdGkJ5MCLLyEtcMiUXPbLVmPyRDLAF35nM1AsvPb45yNPruJubh rePEr7v79J1vSUchg7fStojiloBLDVwKng01RI0MAzD7MrPxjq/wQi5fN+HzpJYQ6u9g EW5A== X-Gm-Message-State: ANoB5pls6zMgIYbhdI+jWgrIxA6XacT7T7SPs7jdSY07b7Zivwyhq8N6 ljcWSSTYukfPIBDuf2AzeB+skA== X-Google-Smtp-Source: AA0mqf5ioRD8Rp3a4DFBc+9ha/YTMlFmINhkBBAsYBYwy3ftwJ7f02WlsXMZj3e0Hm5OZ5wE1KWh0w== X-Received: by 2002:a2e:8887:0:b0:279:f19b:2192 with SMTP id k7-20020a2e8887000000b00279f19b2192mr931872lji.471.1670133556578; Sat, 03 Dec 2022 21:59:16 -0800 (PST) Received: from eriador.lan ([37.153.55.125]) by smtp.gmail.com with ESMTPSA id o6-20020a05651205c600b004917a30c82bsm1650028lfo.153.2022.12.03.21.59.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 03 Dec 2022 21:59:16 -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 07/15] thermal/drivers/tsens: Support using nvmem cells for calibration data Date: Sun, 4 Dec 2022 07:59:01 +0200 Message-Id: <20221204055909.1351895-8-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: devicetree@vger.kernel.org Add a unified function using nvmem cells for parsing the calibration data rather than parsing the calibration blob manually. Signed-off-by: Dmitry Baryshkov --- drivers/thermal/qcom/tsens-v0_1.c | 15 ++++++ drivers/thermal/qcom/tsens-v1.c | 6 ++- drivers/thermal/qcom/tsens.c | 76 +++++++++++++++++++++++++++++++ drivers/thermal/qcom/tsens.h | 5 ++ 4 files changed, 101 insertions(+), 1 deletion(-) diff --git a/drivers/thermal/qcom/tsens-v0_1.c b/drivers/thermal/qcom/tsens-v0_1.c index 94bb185c5aae..56c4e47db0c0 100644 --- a/drivers/thermal/qcom/tsens-v0_1.c +++ b/drivers/thermal/qcom/tsens-v0_1.c @@ -229,6 +229,11 @@ static int calibrate_8916(struct tsens_priv *priv) u32 p1[5], p2[5]; int mode = 0; u32 *qfprom_cdata, *qfprom_csel; + int ret; + + ret = tsens_calibrate_nvmem(priv, 3); + if (!ret) + return 0; qfprom_cdata = (u32 *)qfprom_read(priv->dev, "calib"); if (IS_ERR(qfprom_cdata)) @@ -286,6 +291,11 @@ static int calibrate_8939(struct tsens_priv *priv) int mode = 0; u32 *qfprom_cdata; u32 cdata[6]; + int ret; + + ret = tsens_calibrate_common(priv); + if (!ret) + return 0; qfprom_cdata = (u32 *)qfprom_read(priv->dev, "calib"); if (IS_ERR(qfprom_cdata)) @@ -491,6 +501,11 @@ static int calibrate_9607(struct tsens_priv *priv) u32 p1[5], p2[5]; int mode = 0; u32 *qfprom_cdata; + int ret; + + ret = tsens_calibrate_common(priv); + if (!ret) + return 0; qfprom_cdata = (u32 *)qfprom_read(priv->dev, "calib"); if (IS_ERR(qfprom_cdata)) diff --git a/drivers/thermal/qcom/tsens-v1.c b/drivers/thermal/qcom/tsens-v1.c index 119b619e72c2..2684c4a0941a 100644 --- a/drivers/thermal/qcom/tsens-v1.c +++ b/drivers/thermal/qcom/tsens-v1.c @@ -143,7 +143,11 @@ static int calibrate_v1(struct tsens_priv *priv) u32 p1[10], p2[10]; u32 mode = 0, lsb = 0, msb = 0; u32 *qfprom_cdata; - int i; + int i, ret; + + ret = tsens_calibrate_common(priv); + if (!ret) + return 0; qfprom_cdata = (u32 *)qfprom_read(priv->dev, "calib"); if (IS_ERR(qfprom_cdata)) diff --git a/drivers/thermal/qcom/tsens.c b/drivers/thermal/qcom/tsens.c index 252c5ffdd1b6..9f1f9ca7963d 100644 --- a/drivers/thermal/qcom/tsens.c +++ b/drivers/thermal/qcom/tsens.c @@ -70,6 +70,82 @@ char *qfprom_read(struct device *dev, const char *cname) return ret; } +int tsens_calibrate_nvmem(struct tsens_priv *priv, int shift) +{ + u32 mode; + u32 base1, base2; + u32 p1[MAX_SENSORS], p2[MAX_SENSORS]; + char name[] = "sXX_pY"; /* s10_p1 */ + int i, ret; + + if (priv->num_sensors > MAX_SENSORS) + return -EINVAL; + + ret = nvmem_cell_read_variable_le_u32(priv->dev, "mode", &mode); + if (ret == -ENOENT) + dev_warn(priv->dev, "Please migrate to separate nvmem cells for calibration data\n"); + if (ret < 0) + return ret; + + dev_dbg(priv->dev, "calibration mode is %d\n", mode); + + ret = nvmem_cell_read_variable_le_u32(priv->dev, "base1", &base1); + if (ret < 0) + return ret; + + ret = nvmem_cell_read_variable_le_u32(priv->dev, "base2", &base2); + if (ret < 0) + return ret; + + for (i = 0; i < priv->num_sensors; i++) { + ret = snprintf(name, sizeof(name), "s%d_p1", i); + if (ret < 0) + return ret; + + ret = nvmem_cell_read_variable_le_u32(priv->dev, name, &p1[i]); + if (ret) + return ret; + + ret = snprintf(name, sizeof(name), "s%d_p2", i); + if (ret < 0) + return ret; + + ret = nvmem_cell_read_variable_le_u32(priv->dev, name, &p2[i]); + if (ret) + return ret; + } + + switch (mode) { + case ONE_PT_CALIB: + for (i = 0; i < priv->num_sensors; i++) + p1[i] = p1[i] + (base1 << shift); + break; + case TWO_PT_CALIB: + for (i = 0; i < priv->num_sensors; i++) + p2[i] = (p2[i] + base2) << shift; + fallthrough; + case ONE_PT_CALIB2: + for (i = 0; i < priv->num_sensors; i++) + p1[i] = (p1[i] + base1) << shift; + break; + default: + dev_dbg(priv->dev, "calibrationless mode\n"); + for (i = 0; i < priv->num_sensors; i++) { + p1[i] = 500; + p2[i] = 780; + } + } + + compute_intercept_slope(priv, p1, p2, mode); + + return 0; +} + +int tsens_calibrate_common(struct tsens_priv *priv) +{ + return tsens_calibrate_nvmem(priv, 2); +} + /* * Use this function on devices where slope and offset calculations * depend on calibration data read from qfprom. On others the slope diff --git a/drivers/thermal/qcom/tsens.h b/drivers/thermal/qcom/tsens.h index 4f969dd7dc47..8d1b83acdb95 100644 --- a/drivers/thermal/qcom/tsens.h +++ b/drivers/thermal/qcom/tsens.h @@ -6,6 +6,7 @@ #ifndef __QCOM_TSENS_H__ #define __QCOM_TSENS_H__ +#define NO_PT_CALIB 0x0 #define ONE_PT_CALIB 0x1 #define ONE_PT_CALIB2 0x2 #define TWO_PT_CALIB 0x3 @@ -17,6 +18,8 @@ #define THRESHOLD_MAX_ADC_CODE 0x3ff #define THRESHOLD_MIN_ADC_CODE 0x0 +#define MAX_SENSORS 16 + #include #include #include @@ -576,6 +579,8 @@ struct tsens_priv { }; char *qfprom_read(struct device *dev, const char *cname); +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); int init_common(struct tsens_priv *priv); int get_temp_tsens_valid(const struct tsens_sensor *s, int *temp);