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 <konrad.dybcio@xxxxxxxxxx>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
---
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 <linux/nvmem-consumer.h>
#include <linux/platform_device.h>
#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);
--
2.35.1
