Restore readLDOreg() and add USE_FASTCHG_TO_KICK_WATCHDOG to ensure Arduino_BHY2 compatibility

Author: giulcioffi

libraries/Nicla_System/src/Nicla_System.cpp

@@ -99,6 +99,11 @@ bool nicla::enterShipMode()
   _pmic.writeByte(BQ25120A_ADDRESS, BQ25120A_STATUS, status_reg);
 }
 
+uint8_t nicla::readLDOreg()
+{
+  return _pmic.readByte(BQ25120A_ADDRESS, BQ25120A_LDO_CTRL);
+}
+
 bool nicla::enableCharge(uint8_t mA)
 {
   digitalWrite(p25, LOW);

libraries/Nicla_System/src/Nicla_System.h

@@ -8,6 +8,8 @@
 #include <mbed.h>
 #include <I2C.h>
 
+#define USE_FASTCHG_TO_KICK_WATCHDOG 1
+
 class nicla {
 
 public:
@@ -16,6 +18,7 @@ class nicla {
   static bool enable1V8LDO();
   static bool disableLDO();
   static bool enterShipMode();
+  static uint8_t readLDOreg();
   static bool enableCharge(uint8_t mA = 20);
 
   static RGBled leds;