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[2001:14ba:a085:4d00::8a5]) by smtp.gmail.com with ESMTPSA id q18-20020a056512211200b004b257fef958sm1673048lfr.94.2022.12.20.18.05.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 20 Dec 2022 18:05:29 -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: "Bryan O'Donoghue" , linux-arm-msm@vger.kernel.org, linux-pm@vger.kernel.org, devicetree@vger.kernel.org Subject: [PATCH v4 10/20] thermal/drivers/tsens: Support using nvmem cells for msm8974 calibration Date: Wed, 21 Dec 2022 04:05:10 +0200 Message-Id: <20221221020520.1326964-11-dmitry.baryshkov@linaro.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20221221020520.1326964-1-dmitry.baryshkov@linaro.org> References: <20221221020520.1326964-1-dmitry.baryshkov@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@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. Reviewed-by: Konrad Dybcio 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 a6c2b2b76264..41b061c0bdd1 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" @@ -359,6 +360,50 @@ static int calibrate_8939(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; @@ -366,6 +411,11 @@ 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 68aef0ed6182..83bf60fa9008 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 645ae02438fa..a9ae8df9f810 100644 --- a/drivers/thermal/qcom/tsens.h +++ b/drivers/thermal/qcom/tsens.h @@ -585,6 +585,7 @@ 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);