diff --git a/drivers/thermal/st/st_thermal.c b/drivers/thermal/st/st_thermal.c
index d1ec5804c0bb..76c515dd802b 100644
--- a/drivers/thermal/st/st_thermal.c
+++ b/drivers/thermal/st/st_thermal.c
@@ -25,7 +25,7 @@
  * Function to allocate regfields which are common
  * between syscfg and memory mapped based sensors
  */
-int st_thermal_alloc_regfields(struct st_thermal_sensor *sensor)
+static int st_thermal_alloc_regfields(struct st_thermal_sensor *sensor)
 {
 	struct device *dev = sensor->dev;
 	struct regmap *regmap = sensor->regmap;
diff --git a/drivers/thermal/st/st_thermal_memmap.c b/drivers/thermal/st/st_thermal_memmap.c
index bd223398daf1..fc0c9e198710 100644
--- a/drivers/thermal/st/st_thermal_memmap.c
+++ b/drivers/thermal/st/st_thermal_memmap.c
@@ -157,7 +157,7 @@ static const struct st_thermal_sensor_ops st_mmap_sensor_ops = {
 };
 
 /* Compatible device data stih416 mpe thermal sensor */
-const struct st_thermal_compat_data st_416mpe_cdata = {
+static const struct st_thermal_compat_data st_416mpe_cdata = {
 	.reg_fields		= st_mmap_thermal_regfields,
 	.ops			= &st_mmap_sensor_ops,
 	.calibration_val	= 14,
@@ -166,7 +166,7 @@ const struct st_thermal_compat_data st_416mpe_cdata = {
 };
 
 /* Compatible device data stih407 thermal sensor */
-const struct st_thermal_compat_data st_407_cdata = {
+static const struct st_thermal_compat_data st_407_cdata = {
 	.reg_fields		= st_mmap_thermal_regfields,
 	.ops			= &st_mmap_sensor_ops,
 	.calibration_val	= 16,
@@ -181,12 +181,12 @@ static const struct of_device_id st_mmap_thermal_of_match[] = {
 };
 MODULE_DEVICE_TABLE(of, st_mmap_thermal_of_match);
 
-int st_mmap_probe(struct platform_device *pdev)
+static int st_mmap_probe(struct platform_device *pdev)
 {
 	return st_thermal_register(pdev,  st_mmap_thermal_of_match);
 }
 
-int st_mmap_remove(struct platform_device *pdev)
+static int st_mmap_remove(struct platform_device *pdev)
 {
 	return st_thermal_unregister(pdev);
 }
diff --git a/drivers/thermal/st/st_thermal_syscfg.c b/drivers/thermal/st/st_thermal_syscfg.c
index 65eab7212d57..3df5b7890703 100644
--- a/drivers/thermal/st/st_thermal_syscfg.c
+++ b/drivers/thermal/st/st_thermal_syscfg.c
@@ -104,7 +104,7 @@ static const struct st_thermal_sensor_ops st_syscfg_sensor_ops = {
 };
 
 /* Compatible device data for stih415 sas thermal sensor */
-const struct st_thermal_compat_data st_415sas_cdata = {
+static const struct st_thermal_compat_data st_415sas_cdata = {
 	.sys_compat		= "st,stih415-front-syscfg",
 	.reg_fields		= st_415sas_regfields,
 	.ops			= &st_syscfg_sensor_ops,
@@ -114,7 +114,7 @@ const struct st_thermal_compat_data st_415sas_cdata = {
 };
 
 /* Compatible device data for stih415 mpe thermal sensor */
-const struct st_thermal_compat_data st_415mpe_cdata = {
+static const struct st_thermal_compat_data st_415mpe_cdata = {
 	.sys_compat		= "st,stih415-system-syscfg",
 	.reg_fields		= st_415mpe_regfields,
 	.ops			= &st_syscfg_sensor_ops,
@@ -124,7 +124,7 @@ const struct st_thermal_compat_data st_415mpe_cdata = {
 };
 
 /* Compatible device data for stih416 sas thermal sensor */
-const struct st_thermal_compat_data st_416sas_cdata = {
+static const struct st_thermal_compat_data st_416sas_cdata = {
 	.sys_compat		= "st,stih416-front-syscfg",
 	.reg_fields		= st_416sas_regfields,
 	.ops			= &st_syscfg_sensor_ops,
@@ -134,7 +134,7 @@ const struct st_thermal_compat_data st_416sas_cdata = {
 };
 
 /* Compatible device data for stid127 thermal sensor */
-const struct st_thermal_compat_data st_127_cdata = {
+static const struct st_thermal_compat_data st_127_cdata = {
 	.sys_compat		= "st,stid127-cpu-syscfg",
 	.reg_fields		= st_127_regfields,
 	.ops			= &st_syscfg_sensor_ops,
@@ -152,12 +152,12 @@ static const struct of_device_id st_syscfg_thermal_of_match[] = {
 };
 MODULE_DEVICE_TABLE(of, st_syscfg_thermal_of_match);
 
-int st_syscfg_probe(struct platform_device *pdev)
+static int st_syscfg_probe(struct platform_device *pdev)
 {
 	return st_thermal_register(pdev, st_syscfg_thermal_of_match);
 }
 
-int st_syscfg_remove(struct platform_device *pdev)
+static int st_syscfg_remove(struct platform_device *pdev)
 {
 	return st_thermal_unregister(pdev);
 }