-int pca9698_direction_input(u8 chip, unsigned offset);
-int pca9698_direction_output(u8 chip, unsigned offset);
-int pca9698_get_input(u8 chip, unsigned offset);
-int pca9698_set_output(u8 chip, unsigned offset, int value);
+int pca9698_request(unsigned gpio, const char *label);
+void pca9698_free(unsigned gpio);
+int pca9698_direction_input(u8 addr, unsigned gpio);
+int pca9698_direction_output(u8 addr, unsigned gpio, int value);
+int pca9698_get_value(u8 addr, unsigned gpio);
+int pca9698_set_value(u8 addr, unsigned gpio, int value);