Add a unified function using nvmem cells for parsing the calibration
data rather than parsing the calibration blob manually.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
---
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 0bc4e5cec184..7f87b403c6fa 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 83c2853546d0..89955522041d 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 b191e19df93d..68aef0ed6182 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 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 <linux/interrupt.h>
#include <linux/thermal.h>
#include <linux/regmap.h>
@@ -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);
--
2.35.1
