Drop C-style 'void' argument

Marlin/src/HAL/shared/HAL_SPI.h

@@ -59,7 +59,7 @@
 //
 
 // Initialize SPI bus
-void spiBegin(void);
+void spiBegin();
 
 // Configure SPI for specified SPI speed
 void spiInit(uint8_t spiRate);
@@ -68,7 +68,7 @@ void spiInit(uint8_t spiRate);
 void spiSend(uint8_t b);
 
 // Read single byte from SPI
-uint8_t spiRec(void);
+uint8_t spiRec();
 
 // Read from SPI into buffer
 void spiRead(uint8_t* buf, uint16_t nbyte);

Marlin/src/HAL/shared/backtrace/backtrace.cpp

@@ -65,7 +65,7 @@ static const UnwindCallbacks UnwCallbacks = {
   #endif
 };
 
-void backtrace(void) {
+void backtrace() {
 
   UnwindFrame btf;
   uint32_t sp = 0, lr = 0, pc = 0;
@@ -95,6 +95,6 @@ void backtrace(void) {
 
 #else // !__arm__ && !__thumb__
 
-void backtrace(void) {}
+void backtrace() {}
 
 #endif

Marlin/src/HAL/shared/backtrace/backtrace.h

@@ -22,4 +22,4 @@
 #pragma once
 
 // Perform a backtrace to the serial port
-void backtrace(void);
+void backtrace();

Marlin/src/HAL/shared/backtrace/unwarm.cpp

@@ -78,7 +78,7 @@ void UnwInitState(UnwState * const state,     /**< Pointer to structure to fill.
 }
 
 // Detect if function names are available
-static int __attribute__ ((noinline)) has_function_names(void) {
+static int __attribute__ ((noinline)) has_function_names() {
   uint32_t flag_word = ((uint32_t*)(((uint32_t)(&has_function_names)) & (-4))) [-1];
   return ((flag_word & 0xFF000000) == 0xFF000000) ? 1 : 0;
 }

Marlin/src/HAL/shared/backtrace/unwarmbytab.cpp

@@ -23,9 +23,9 @@ extern "C" const UnwTabEntry __exidx_start[];
 extern "C" const UnwTabEntry __exidx_end[];
 
 /* This prevents the linking of libgcc unwinder code */
-void __aeabi_unwind_cpp_pr0(void) {};
-void __aeabi_unwind_cpp_pr1(void) {};
-void __aeabi_unwind_cpp_pr2(void) {};
+void __aeabi_unwind_cpp_pr0() {};
+void __aeabi_unwind_cpp_pr1() {};
+void __aeabi_unwind_cpp_pr2() {};
 
 static inline __attribute__((always_inline)) uint32_t prel31_to_addr(const uint32_t *prel31) {
   uint32_t offset = (((uint32_t)(*prel31)) << 1) >> 1;
@@ -285,7 +285,7 @@ static UnwResult UnwTabExecuteInstructions(const UnwindCallbacks *cb, UnwTabStat
   return UNWIND_SUCCESS;
 }
 
-static inline __attribute__((always_inline)) uint32_t read_psp(void) {
+static inline __attribute__((always_inline)) uint32_t read_psp() {
 
   /* Read the current PSP and return its value as a pointer */
   uint32_t psp;

Marlin/src/HAL/shared/backtrace/unwinder.cpp

@@ -27,7 +27,7 @@ extern "C" const UnwTabEntry __exidx_start[];
 extern "C" const UnwTabEntry __exidx_end[];
 
 // Detect if unwind information is present or not
-static int HasUnwindTableInfo(void) {
+static int HasUnwindTableInfo() {
   // > 16 because there are default entries we can't supress
   return ((char*)(&__exidx_end) - (char*)(&__exidx_start)) > 16 ? 1 : 0;
 }

Marlin/src/HAL/shared/eeprom_i2c.cpp

@@ -42,7 +42,7 @@ static uint8_t eeprom_device_address = 0x50;
 // Public functions
 // ------------------------
 
-static void eeprom_init(void) {
+static void eeprom_init() {
   static bool eeprom_initialized = false;
   if (!eeprom_initialized) {
     Wire.begin();