Remove return values of handlers.

Signed-off-by: imi415 <imi415.public@gmail.com>

.clang-format

@@ -1,8 +1,8 @@
 BasedOnStyle: Google
 IndentWidth: 4
 AlignConsecutiveMacros: AcrossEmptyLines
-AlignConsecutiveDeclarations: AcrossEmptyLines
+AlignConsecutiveDeclarations: Consecutive
-AlignConsecutiveAssignments: AcrossEmptyLinesAndComments
+AlignConsecutiveAssignments: Consecutive
 AllowShortFunctionsOnASingleLine: None
 BreakBeforeBraces: Custom
 BraceWrapping:

src/stx7105_exc.c

@@ -25,84 +25,75 @@ typedef enum {
 
 /* ========================= TMU 0/1/2 Underrun Interrupt Handlers =================================  */
 
-WEAK_ATTR int tuni0_handler(void) {
+WEAK_ATTR void tuni0_handler(void) {
     /* Does nothing */
-    return 0;
 }
 
-WEAK_ATTR int tuni1_handler(void) {
+WEAK_ATTR void tuni1_handler(void) {
     /* Does nothing */
-    return 0;
 }
 
-WEAK_ATTR int tuni2_handler(void) {
+WEAK_ATTR void tuni2_handler(void) {
     /* Does nothing */
-    return 0;
 }
 
 /* ========================= ASC(UART) 0/1/2 Interrupt Handlers =================================  */
 
-WEAK_ATTR int asc2_handler(void) {
+WEAK_ATTR void asc2_handler(void) {
     /* Does nothing */
-    return 0;
 }
 
 /* ========================= Different Trap Code Handlers =================================  */
 
-WEAK_ATTR int syscall_handler(uint32_t p1, uint32_t p2, uint32_t p3, uint32_t p4) {
+WEAK_ATTR void syscall_handler(uint32_t p1, uint32_t p2, uint32_t p3, uint32_t p4) {
-    return 0;
+    /* Does nothing */
 }
 
 /* ========================= TRAPA(Trap) Exception Handlers =================================  */
 
-WEAK_ATTR int trap_handler(uint32_t p1, uint32_t p2, uint32_t p3, uint32_t p4) {
+WEAK_ATTR void trap_handler(uint32_t p1, uint32_t p2, uint32_t p3, uint32_t p4) {
     tra_type_t tra = (CSP->TRA >> 2U) & 0xFFU; /* TRA[9:2] */
 
     switch (tra) {
         case TRA_TYPE_SYSCALL:
-            return syscall_handler(p1, p2, p3, p4);
+            syscall_handler(p1, p2, p3, p4);
             break;
         default:
             break;
     }
-
-    return 0;
 }
 
 /* ========================= System Exception Handlers =================================  */
 
-WEAK_IRQ_ATTR int general_exc_handler(uint32_t p1, uint32_t p2, uint32_t p3, uint32_t p4) {
+WEAK_IRQ_ATTR void general_exc_handler(uint32_t p1, uint32_t p2, uint32_t p3, uint32_t p4) {
     expevt_type_t expevt = CSP->EXPEVT;
     switch (expevt) {
         case EXP_TYPE_TRAP:
-            return trap_handler(p1, p2, p3, p4);
+            trap_handler(p1, p2, p3, p4);
             break;
         default:
             break;
     }
-
-    return 0;
 }
 
 /* ========================= System Interrupt Handlers =================================  */
 
-WEAK_IRQ_ATTR int general_int_handler(void) {
+WEAK_IRQ_ATTR void general_int_handler(void) {
     intevt_type_t intevt = CSP->INTEVT;
     switch (intevt) {
         case INT_TYPE_TMU_TNUI0:
-            return tuni0_handler();
+            tuni0_handler();
             break;
         case INT_TYPE_TMU_TNUI1:
-            return tuni1_handler();
+            tuni1_handler();
             break;
         case INT_TYPE_TMU_TNUI2:
-            return tuni2_handler();
+            tuni2_handler();
             break;
         case INT_TYPE_ASC_UART2:
-            return asc2_handler();
+            asc2_handler();
             break;
         default:
             break;
     }
-    return 0;
 }

src/stx7105_utils.c

@@ -48,9 +48,7 @@ void delay_ms(uint32_t msec) {
     TMU->TSTR &= ~TMU_TSTR_STR0_Msk; /* Stop counter */
 }
 
-int tuni0_handler(void) {
+void tuni0_handler(void) {
     s_tmu_flag = 1U;
     TMU->TCR0 &= ~(TMU_TCR_UNF_Msk);
-
-    return 0;
 }

src/syscalls.c

@@ -38,7 +38,6 @@ int _open(const char *name, int flags, int mode) {
     return -1;
 }
 
-
 int _read(int file, char *ptr, int len) {
     return 0;
 }