Centralise which level is 'locked'

src/drivers/include/gpios.hpp

@@ -77,6 +77,8 @@ class IGpios {
    * Returns the most recently cached value of the given pin.
    */
   virtual auto Get(Pin) const -> bool = 0;
+
+  virtual auto IsLocked() const -> bool { return Get(Pin::kKeyLock); }
 };
 
 class Gpios : public IGpios {

src/system_fsm/booting.cpp

@@ -121,7 +121,7 @@ auto Booting::exit() -> void {
 auto Booting::react(const BootComplete& ev) -> void {
   ESP_LOGI(kTag, "bootup completely successfully");
 
-  if (sServices->gpios().Get(drivers::Gpios::Pin::kKeyLock)) {
+  if (sServices->gpios().IsLocked()) {
     transit<Idle>();
   } else {
     transit<Running>();

src/system_fsm/system_fsm.cpp

@@ -46,12 +46,12 @@ void SystemState::react(const HapticTrigger& trigger) {
 
 void SystemState::react(const internal::GpioInterrupt&) {
   auto& gpios = sServices->gpios();
-  bool prev_key_lock = gpios.Get(drivers::Gpios::Pin::kKeyLock);
+  bool prev_key_lock = gpios.IsLocked();
   bool prev_has_headphones = !gpios.Get(drivers::Gpios::Pin::kPhoneDetect);
 
   gpios.Read();
 
-  bool key_lock = gpios.Get(drivers::Gpios::Pin::kKeyLock);
+  bool key_lock = gpios.IsLocked();
   bool has_headphones = !gpios.Get(drivers::Gpios::Pin::kPhoneDetect);
 
   if (key_lock != prev_key_lock) {
@@ -87,7 +87,7 @@ void SystemState::react(const internal::SamdInterrupt&) {
 }
 
 auto SystemState::IdleCondition() -> bool {
-  return sServices->gpios().Get(drivers::IGpios::Pin::kKeyLock) &&
+  return sServices->gpios().IsLocked() &&
          audio::AudioState::is_in_state<audio::states::Standby>();
 }
 

src/ui/ui_fsm.cpp

@@ -80,7 +80,7 @@ auto UiState::InitBootSplash(drivers::IGpios& gpios) -> bool {
 
   sCurrentScreen.reset(new screens::Splash());
   sTask.reset(UiTask::Start());
-  sDisplay->SetDisplayOn(!gpios.Get(drivers::IGpios::Pin::kKeyLock));
+  sDisplay->SetDisplayOn(!gpios.IsLocked());
   return true;
 }