#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/sysfs.h>
+#include <linux/slab.h>
/* AD7414 registers */
return i2c_smbus_write_byte_data(client, reg, value);
}
-struct ad7414_data *ad7414_update_device(struct device *dev)
+static struct ad7414_data *ad7414_update_device(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct ad7414_data *data = i2c_get_clientdata(client);