static inline int hdspm_get_pll_freq(struct hdspm *hdspm);
 static int hdspm_update_simple_mixer_controls(struct hdspm *hdspm);
 static int hdspm_autosync_ref(struct hdspm *hdspm);
+static int hdspm_set_toggle_setting(struct hdspm *hdspm, u32 regmask, int out);
 static int snd_hdspm_set_defaults(struct hdspm *hdspm);
 static int hdspm_system_clock_mode(struct hdspm *hdspm);
 static void hdspm_set_sgbuf(struct hdspm *hdspm,
  **/
 static void hdspm_set_system_clock_mode(struct hdspm *hdspm, int mode)
 {
-       switch (hdspm->io_type) {
-       case AIO:
-       case RayDAT:
-               if (0 == mode)
-                       hdspm->settings_register |= HDSPM_c0Master;
-               else
-                       hdspm->settings_register &= ~HDSPM_c0Master;
-
-               hdspm_write(hdspm, HDSPM_WR_SETTINGS, hdspm->settings_register);
-               break;
-
-       default:
-               if (0 == mode)
-                       hdspm->control_register |= HDSPM_ClockModeMaster;
-               else
-                       hdspm->control_register &= ~HDSPM_ClockModeMaster;
-
-               hdspm_write(hdspm, HDSPM_controlRegister,
-                               hdspm->control_register);
-       }
+       hdspm_set_toggle_setting(hdspm,
+                       (hdspm_is_raydat_or_aio(hdspm)) ?
+                       HDSPM_c0Master : HDSPM_ClockModeMaster,
+                       (0 == mode));
 }