+#ifdef CONFIG_ARCH_OMAP3
+/* Sidetone specific API */
+int omap_st_set_chgain(unsigned int id, int channel, s16 chgain);
+int omap_st_get_chgain(unsigned int id, int channel, s16 *chgain);
+int omap_st_enable(unsigned int id);
+int omap_st_disable(unsigned int id);
+int omap_st_is_enabled(unsigned int id);
+#else
+static inline int omap_st_set_chgain(unsigned int id, int channel,
+ s16 chgain) { return 0; }
+static inline int omap_st_get_chgain(unsigned int id, int channel,
+ s16 *chgain) { return 0; }
+static inline int omap_st_enable(unsigned int id) { return 0; }
+static inline int omap_st_disable(unsigned int id) { return 0; }
+static inline int omap_st_is_enabled(unsigned int id) { return 0; }
+#endif
+