pw_sys_io: rename pw_sys_io_Init functions

Since pw_sys_io_Init() is not part of the pw_sys_io facade, and the
backend-specific functions are only called from target-specific places,
rename the backend-specific functions to include the backend as part of
the name.

Change-Id: I42c0eb5e8932ee73707db574847e2aed58517132
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/66862
Commit-Queue: Scott James Remnant <keybuk@google.com>
Pigweed-Auto-Submit: Scott James Remnant <keybuk@google.com>
Reviewed-by: Ewout van Bekkum <ewout@google.com>

Author: keybuk

pw_sys_io_arduino/public/pw_sys_io_arduino/init.h

@@ -18,6 +18,6 @@
 PW_EXTERN_C_START
 
 // The actual implement of PreMainInit() in sys_io_BACKEND.
-void pw_sys_io_Init();
+void pw_sys_io_arduino_Init();
 
 PW_EXTERN_C_END

pw_sys_io_arduino/sys_io_arduino.cc

@@ -20,7 +20,7 @@
 #include "pw_preprocessor/compiler.h"
 #include "pw_sys_io/sys_io.h"
 
-extern "C" void pw_sys_io_Init() { Serial.begin(115200); }
+extern "C" void pw_sys_io_arduino_Init() { Serial.begin(115200); }
 
 namespace pw::sys_io {
 

pw_sys_io_baremetal_lm3s6965evb/public/pw_sys_io_baremetal_lm3s6965evb/init.h

@@ -18,6 +18,6 @@
 PW_EXTERN_C_START
 
 // The actual implement of PreMainInit() in sys_io_BACKEND.
-void pw_sys_io_Init();
+void pw_sys_io_lm3s6965evb_Init();
 
 PW_EXTERN_C_END

pw_sys_io_baremetal_lm3s6965evb/sys_io_baremetal.cc

@@ -69,7 +69,7 @@ void SetBaudRate(uint32_t clock, uint32_t target_baud) {
 
 }  // namespace
 
-extern "C" void pw_sys_io_Init() {
+extern "C" void pw_sys_io_lm3s6965evb_Init() {
   rcgc1 |= kRcgcUart0EnableMask;
   for (volatile int i = 0; i < 3; ++i) {
     // We must wait after enabling uart.

pw_sys_io_baremetal_stm32f429/public/pw_sys_io_baremetal_stm32f429/init.h

@@ -18,6 +18,6 @@
 PW_EXTERN_C_START
 
 // The actual implement of PreMainInit() in sys_io_BACKEND.
-void pw_sys_io_Init();
+void pw_sys_io_stm32f429_Init();
 
 PW_EXTERN_C_END

pw_sys_io_baremetal_stm32f429/sys_io_baremetal.cc

@@ -130,7 +130,7 @@ volatile UsartBlock& usart1 =
 
 }  // namespace
 
-extern "C" void pw_sys_io_Init() {
+extern "C" void pw_sys_io_stm32f429_Init() {
   // Enable 'A' GIPO clocks.
   platform_rcc.ahb1_config |= kGpioAEnable;
 

targets/arduino/init.cc

@@ -19,4 +19,4 @@
 // Arduino target specific init. For Pigweed, this calls pw_sys_io's init. User
 // projects may chose to provide something different if they need more pre-main
 // init functionality.
-extern "C" void pw_arduino_Init() { pw_sys_io_Init(); }
+extern "C" void pw_arduino_Init() { pw_sys_io_arduino_Init(); }

targets/lm3s6965evb_qemu/boot.cc

@@ -34,7 +34,7 @@ void pw_boot_PreStaticMemoryInit() {
 
 void pw_boot_PreStaticConstructorInit() {}
 
-void pw_boot_PreMainInit() { pw_sys_io_Init(); }
+void pw_boot_PreMainInit() { pw_sys_io_lm3s6965evb_Init(); }
 
 PW_NO_RETURN void pw_boot_PostMain() {
   // QEMU requires a special command to tell the VM to shut down.

targets/stm32f429i_disc1/boot.cc

@@ -58,7 +58,7 @@ void pw_boot_PreStaticConstructorInit() {
 #endif  // PW_MALLOC_ACTIVE
 }
 
-void pw_boot_PreMainInit() { pw_sys_io_Init(); }
+void pw_boot_PreMainInit() { pw_sys_io_stm32f429_Init(); }
 
 PW_NO_RETURN void pw_boot_PostMain() {
   // In case main() returns, just sit here until the device is reset.