diff --git a/drivers/i2c/chips/ds1374.c b/drivers/i2c/chips/ds1374.c
index 1596e6478782060ff8f07f782c343f1ac98875c0..da488b735abf621af4f0bed7578843798c39f282 100644
--- a/drivers/i2c/chips/ds1374.c
+++ b/drivers/i2c/chips/ds1374.c
@@ -167,7 +167,8 @@ static void ds1374_set_tlet(ulong arg)
 
 static ulong new_time;
 
-DECLARE_TASKLET_DISABLED(ds1374_tasklet, ds1374_set_tlet, (ulong) & new_time);
+static DECLARE_TASKLET_DISABLED(ds1374_tasklet, ds1374_set_tlet,
+				(ulong) & new_time);
 
 int ds1374_set_rtc_time(ulong nowtime)
 {
diff --git a/drivers/i2c/chips/pcf8574.c b/drivers/i2c/chips/pcf8574.c
index 2c2555d46fdfd1f4978cbc6677ea14885d988bfa..c323c2de236c876921235abb72afb8a38ee38ab3 100644
--- a/drivers/i2c/chips/pcf8574.c
+++ b/drivers/i2c/chips/pcf8574.c
@@ -115,7 +115,7 @@ static int pcf8574_attach_adapter(struct i2c_adapter *adapter)
 }
 
 /* This function is called by i2c_probe */
-int pcf8574_detect(struct i2c_adapter *adapter, int address, int kind)
+static int pcf8574_detect(struct i2c_adapter *adapter, int address, int kind)
 {
 	struct i2c_client *new_client;
 	struct pcf8574_data *data;
diff --git a/drivers/i2c/chips/pcf8591.c b/drivers/i2c/chips/pcf8591.c
index 3c815b1532496914fe60dee55f8f497415178966..ce420a67560bf2cc457148953828dc7dfb6fdb27 100644
--- a/drivers/i2c/chips/pcf8591.c
+++ b/drivers/i2c/chips/pcf8591.c
@@ -166,7 +166,7 @@ static int pcf8591_attach_adapter(struct i2c_adapter *adapter)
 }
 
 /* This function is called by i2c_probe */
-int pcf8591_detect(struct i2c_adapter *adapter, int address, int kind)
+static int pcf8591_detect(struct i2c_adapter *adapter, int address, int kind)
 {
 	struct i2c_client *new_client;
 	struct pcf8591_data *data;