Fix 6e211ab errors and warnings.

If target has HW tone controls but no HW prescaler (non-implemented or
non-existent), audiohw_set_prescaler() should, for now, do nothing.

Change-Id: If1b1a36970dca82fda1c350fbaa4d6ce068a6d32

1 files changed, 6 insertions, 0 deletions

diff --git a/firmware/drivers/audio/audiohw-swcodec.c b/firmware/drivers/audio/audiohw-swcodec.c
index 6c86bdfaa4..b627c1eeff 100644
--- a/firmware/drivers/audio/audiohw-swcodec.c
+++ b/firmware/drivers/audio/audiohw-swcodec.c
@@ -54,7 +54,13 @@ void audiohw_set_treble(int value)
 #ifndef AUDIOHW_HAVE_PRESCALER
 void audiohw_set_prescaler(int value)
 {
+#ifdef HAVE_SW_TONE_CONTROLS
     tone_set_prescale(value);
+#endif
+    /* FIXME: Should PGA be used if HW tone controls but no HW prescaler?
+       Callback-based implementation would have had no prescaling at all
+       so just do nothing for now, changing nothing. */
+    (void)value;    
 }
 #endif /* AUDIOHW_HAVE_PRESCALER */