Using P0.26 with App Timer

[phipi]

I have an application that toggles an LED on P0.26 based on a timer and that's working fine. Now I need to add a few more timers so I decided to use the APP_TIMER library with the RTC, but when I make the call to nrf_drv_clock_lfclk_request(), I am no longer able to control P0.26. I see that this pin is connection for the 32kHz crystal but I don't actually have an external reference.

Do I still lose functionality of this pin even without an external crystal?

[phipi]

I'm not using the softdevice. I was able to work around by using this:

  NRF_CLOCK->LFCLKSRC = (CLOCK_LFCLKSRC_SRC_RC << CLOCK_LFCLKSRC_SRC_Pos);
  NRF_CLOCK->EVENTS_LFCLKSTARTED = 0;
  NRF_CLOCK->TASKS_LFCLKSTART = 1;

  // Wait for the low frequency clock to start
  while (NRF_CLOCK->EVENTS_LFCLKSTARTED == 0) {}
  NRF_CLOCK->EVENTS_LFCLKSTARTED = 0;

instead of nrf_drv_clock_lfclk_is_running(). Does that make sense?