From 498d245749ce35b21121cf5297547fca64bc52db Mon Sep 17 00:00:00 2001 From: Dmitry Baryshkov Date: Sun, 1 Jan 2023 21:40:23 +0200 Subject: thermal/drivers/tsens: Support using nvmem cells for calibration data Add a unified function using nvmem cells for parsing the calibration data rather than parsing the calibration blob manually. Signed-off-by: Dmitry Baryshkov Link: https://lore.kernel.org/r/20230101194034.831222-10-dmitry.baryshkov@linaro.org Signed-off-by: Daniel Lezcano --- drivers/thermal/qcom/tsens-v0_1.c | 15 ++++++++ drivers/thermal/qcom/tsens-v1.c | 11 +++++- drivers/thermal/qcom/tsens.c | 76 +++++++++++++++++++++++++++++++++++++++ drivers/thermal/qcom/tsens.h | 5 +++ 4 files changed, 106 insertions(+), 1 deletion(-) (limited to 'drivers/thermal/qcom') diff --git a/drivers/thermal/qcom/tsens-v0_1.c b/drivers/thermal/qcom/tsens-v0_1.c index 579028ea48f4..6c9e491f9559 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[4]; + int ret; + + ret = tsens_calibrate_common(priv); + if (!ret) + return 0; qfprom_cdata = (u32 *)qfprom_read(priv->dev, "calib"); if (IS_ERR(qfprom_cdata)) @@ -486,6 +496,11 @@ 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 83c2853546d0..5bba75a845c5 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)) @@ -209,6 +213,11 @@ static int calibrate_8976(struct tsens_priv *priv) u32 p1[11], p2[11]; int mode = 0, tmp = 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.c b/drivers/thermal/qcom/tsens.c index b191e19df93d..ce568a68de4a 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", priv->sensor[i].hw_id); + 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", priv->sensor[i].hw_id); + 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 7dd5fc246894..645ae02438fa 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 @@ -582,6 +585,8 @@ 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); -- cgit v1.2.3