diff --git a/arch/arm/src/samv7/sam_tc.c b/arch/arm/src/samv7/sam_tc.c
index 7f5cf114405..5244da6327d 100644
--- a/arch/arm/src/samv7/sam_tc.c
+++ b/arch/arm/src/samv7/sam_tc.c
@@ -176,7 +176,7 @@ static bool sam_checkreg(struct sam_tc_s *tc, bool wr, uint32_t regaddr,
 static inline uint32_t sam_tc_getreg(struct sam_chan_s *chan,
                                      unsigned int offset);
 static inline void sam_tc_putreg(struct sam_chan_s *chan,
-                                 unsigned int offset, uint32_t regval);
+                                 uint32_t regval, unsigned int offset);
 
 static inline uint32_t sam_chan_getreg(struct sam_chan_s *chan,
                                        unsigned int offset);
@@ -1066,7 +1066,7 @@ static int sam_tc_mcksrc(uint32_t frequency, uint32_t *tcclks,
   uint32_t fnext;
   int ndx = 0;
 
-  tmrinfo("frequency=%d\n", frequency);
+  tmrinfo("frequency=%ld\n", frequency);
 
   /* Satisfy lower bound.  That is, the value of the divider such that:
    *
@@ -1693,8 +1693,8 @@ uint32_t sam_tc_divfreq(TC_HANDLE handle)
 int sam_tc_clockselect(uint32_t frequency, uint32_t *tcclks,
                        uint32_t *actual)
 {
-  uint32_t mck_actual;
-  uint32_t mck_tcclks;
+  uint32_t mck_actual = 0;
+  uint32_t mck_tcclks = 0;
   uint32_t mck_error;
   int ret;
 
@@ -1746,7 +1746,7 @@ int sam_tc_clockselect(uint32_t frequency, uint32_t *tcclks,
 
           if (actual)
             {
-              tmrinfo("return actual=%lu\n", (unsigned long)fselect);
+              tmrinfo("return actual=%lu\n", (unsigned long)pck6_actual);
               *actual = pck6_actual;
             }