BLE Connection Sync - Uninitilize?

Question

I've been working off this example, which provides a great synchronization mechanism. 
 https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/samples/bluetooth/conn_time_sync/README.html 
 the example uses RTC, TIMER and EGU peripherals to do the timing, but only initialises it once in controller_timer_nrf52.c and never turns it off. How should i go about uninitialising these peripherals and reinitialising them again? I need to free up the PPI channels for use in other places and need to turn off the peripherals to save on power. 
 
 this is my attempt so far static int timer_uninit(void)
{
	int ret;
	
 nrfx_gppi_channel_free(ppi_chan_timer_clear_on_rtc_tick);

nrfx_timer_uninit(&app_timer_instance);
	return 0;
}

static int rtc_uninit(void)
{
	int ret;

nrfx_rtc_disable(&app_rtc_instance);
 nrfx_rtc_counter_clear(&app_rtc_instance);
 nrfx_gppi_channel_free(ppi_chan_on_rtc_match);
 nrfx_gppi_channel_free(ppi_chan_on_timer_match);
	nrfx_rtc_uninit(&app_rtc_instance);

return 0;
}
int controller_time_init(void)
{
	int ret;

nrfx_err_t status;
 
 num_rtc_overflows = 0;
 offset_ticks_and_controller_to_app_rtc = 0;

#if defined(__ZEPHYR__)
 IRQ_CONNECT(NRFX_IRQ_NUMBER_GET(NRF_EGU_INST_GET(EGU_INST_IDX)), IRQ_PRIO_LOWEST,
 NRFX_EGU_INST_HANDLER_GET(EGU_INST_IDX), 0, 0);
#endif
 nrfx_egu_t egu_inst = NRFX_EGU_INSTANCE(EGU_INST_IDX);
 status = nrfx_egu_init(&egu_inst, NRFX_EGU_DEFAULT_CONFIG_IRQ_PRIORITY, egu_handler, NULL);
 NRFX_ASSERT(status == NRFX_SUCCESS);
 uint32_t ch0_idx = 0;
 uint32_t channels_to_trigger = (1 << ch0_idx);
 nrfx_egu_int_enable(&egu_inst, channels_to_trigger);

ret = rtc_config();
	if (ret) {
 return ret;
	}

ret = timer_config();
	if (ret) {
 return ret;
	}

int final_ret = config_egu_trigger_on_rtc_and_timer_match();
	return final_ret;
}

int controller_time_uninit(void)
{
	int ret;

nrfx_err_t status;

nrfx_gppi_group_clear(NRFX_GPPI_CHANNEL_GROUP0);
	nrfx_gppi_group_disable(NRFX_GPPI_CHANNEL_GROUP0);

nrfx_gppi_channels_disable(BIT(ppi_chan_timer_clear_on_rtc_tick) | BIT(ppi_chan_on_rtc_match) | BIT(ppi_chan_on_timer_match));

timer_uninit();
	rtc_uninit();

nrfx_egu_t egu_inst = NRFX_EGU_INSTANCE(EGU_INST_IDX);
 nrfx_egu_uninit(&egu_inst);

return 0;
}