looks like this part of refactoring is good?

firmware/development/wave_analyzer.cpp

@@ -117,7 +117,7 @@ static void initWave(const char *name, int index) {
 	if (reader->hw != NULL) {
 		reader->hw->setWidthCallback((VoidInt)(void*) waAnaWidthCallback, (void*) reader);
 
-		reader->hw->setPeridoCallback((VoidInt)(void*) waIcuPeriodCallback, (void*) reader);
+		reader->hw->setPeriodCallback((VoidInt)(void*) waIcuPeriodCallback, (void*) reader);
 	}
 
 	print("wave%d input on %s\r\n", index, hwPortname(brainPin));

firmware/hw_layer/digital_input.cpp

@@ -11,6 +11,6 @@ void digital_input_s::setWidthCallback(VoidInt handler, void *arg) {
 	widthListeners.registerCallback(handler, arg);
 }
 
-void digital_input_s::setPeridoCallback(VoidInt handler, void *arg) {
+void digital_input_s::setPeriodCallback(VoidInt handler, void *arg) {
 	periodListeners.registerCallback(handler, arg);
 }

firmware/hw_layer/digital_input.h

@@ -23,5 +23,5 @@ typedef struct {
 
 	// Width/Period names are historically inherited from ICU implementation, todo: migrate to better names, high/low? rise/hall?
 	void setWidthCallback(VoidInt handler, void *arg);
-	void setPeridoCallback(VoidInt handler, void *arg);
+	void setPeriodCallback(VoidInt handler, void *arg);
 } digital_input_s;

firmware/hw_layer/digital_input_exti.cpp

@@ -23,23 +23,23 @@
 static ioportmask_t ext_used = 0;
 
 // EXT is not able to give you the front direction but you could read the pin in the callback.
-int efiExtiEnablePin(const char *msg, brain_pin_e brainPin, uint32_t mode, palcallback_t cb, void *cb_data) {
+void efiExtiEnablePin(const char *msg, brain_pin_e brainPin, uint32_t mode, palcallback_t cb, void *cb_data) {
 
 	/* paranoid check, in case of GPIO_UNASSIGNED getHwPort will return NULL
 	 * and we will fail on next check */
 	if (brainPin == GPIO_UNASSIGNED)
-		return -1;
+		return;
 
 	ioportid_t port = getHwPort(msg, brainPin);
 	if (port == NULL)
-		return -1;
+		return;
 
 	int index = getHwPin(msg, brainPin);
 
 	/* is this index already used? */
 	if (ext_used & PAL_PORT_BIT(index)) {
 		firmwareError(CUSTOM_ERR_PIN_ALREADY_USED_2, "%s: pin %d: exti index already used", msg, brainPin);
-		return -1;
+		return;
 	}
 
 	ioline_t line = PAL_LINE(port, index);
@@ -48,8 +48,6 @@ int efiExtiEnablePin(const char *msg, brain_pin_e brainPin, uint32_t mode, palca
 
 	/* mark used */
 	ext_used |= PAL_PORT_BIT(index);
-
-	return 0;
 }
 
 void efiExtiDisablePin(brain_pin_e brainPin)

firmware/hw_layer/digital_input_exti.h

@@ -8,6 +8,6 @@
 #include "digital_input.h"
 
 #if HAL_USE_PAL
-int efiExtiEnablePin(const char *msg, brain_pin_e pin, uint32_t mode, palcallback_t cb, void *cb_data);
+void efiExtiEnablePin(const char *msg, brain_pin_e pin, uint32_t mode, palcallback_t cb, void *cb_data);
 void efiExtiDisablePin(brain_pin_e brainPin);
 #endif /* HAL_USE_PAL */

firmware/hw_layer/digital_input_icu.cpp

@@ -233,7 +233,7 @@ digital_input_s * addWaveAnalyzerDriver(const char *msg, brain_pin_e brainPin) {
 /**
  * turns pin off and returns digital_input_s back into registeredIcus pool
  */
-void removeWaveAnalyzerDriver(const char *msg, brain_pin_e brainPin) {
+void stopDigitalCapture(const char *msg, brain_pin_e brainPin) {
 	if (brainPin == GPIO_UNASSIGNED) {
 		return;
 	}

firmware/hw_layer/digital_input_icu.h

@@ -20,7 +20,7 @@ void turnOffCapturePin(brain_pin_e brainPin);
 digital_input_s *addWaveAnalyzerDriver(const char *msg, brain_pin_e brainPin);
 void startInputDriver(const char *msg, /*nullable*/digital_input_s *hw, bool isActiveHigh);
 
-void removeWaveAnalyzerDriver(const char *msg, brain_pin_e brainPin);
+void stopDigitalCapture(const char *msg, brain_pin_e brainPin);
 
 //Nullable
 ICUDriver * getInputCaptureDriver(const char *msg, brain_pin_e hwPin);

firmware/hw_layer/vehicle_speed.cpp

@@ -67,7 +67,7 @@ bool hasVehicleSpeedSensor() {
 }
 
 void stopVSSPins(void) {
-	removeWaveAnalyzerDriver("VSS", activeConfiguration.bc.vehicleSpeedSensorInputPin);
+	stopDigitalCapture("VSS", activeConfiguration.bc.vehicleSpeedSensorInputPin);
 }
 
 void startVSSPins(void) {