static int entropy_nrf5_init(struct device *device)
{
/* Check if this API is called on correct driver instance. */
__ASSERT_NO_MSG(&entropy_nrf5_data == DEV_DATA(device));
/* Locking semaphore initialized to 1 (unlocked) */
k_sem_init(&entropy_nrf5_data.sem_lock, 1, 1);
/* Synching semaphore */
k_sem_init(&entropy_nrf5_data.sem_sync, 0, 1);
rng_pool_init((struct rng_pool *)(entropy_nrf5_data.thr),
CONFIG_ENTROPY_NRF5_THR_POOL_SIZE,
CONFIG_ENTROPY_NRF5_THR_THRESHOLD);
rng_pool_init((struct rng_pool *)(entropy_nrf5_data.isr),
CONFIG_ENTROPY_NRF5_ISR_POOL_SIZE,
CONFIG_ENTROPY_NRF5_ISR_THRESHOLD);
/* Enable or disable bias correction */
if (IS_ENABLED(CONFIG_ENTROPY_NRF5_BIAS_CORRECTION)) {
nrf_rng_error_correction_enable();
} else {
nrf_rng_error_correction_disable();
}
nrf_rng_event_clear(NRF_RNG_EVENT_VALRDY);
nrf_rng_int_enable(NRF_RNG_INT_VALRDY_MASK);
nrf_rng_task_trigger(NRF_RNG_TASK_START);
IRQ_CONNECT(RNG_IRQn, CONFIG_ENTROPY_NRF5_PRI, isr,
&entropy_nrf5_data, 0);
irq_enable(RNG_IRQn);
return 0;
}
static int entropy_nrf5_init(struct device *device)
{
/* Enable the RNG interrupt to be generated on the VALRDY event,
* but do not enable this interrupt in NVIC to be serviced.
* When the interrupt enters the Pending state it will set internal
* event (SEVONPEND is activated by kernel) and wake up the core
* if it was suspended by WFE. And that's enough. */
nrf_rng_int_enable(NRF_RNG_INT_VALRDY_MASK);
NVIC_ClearPendingIRQ(RNG_IRQn);
/* Enable or disable bias correction */
if (IS_ENABLED(CONFIG_ENTROPY_NRF5_BIAS_CORRECTION)) {
nrf_rng_error_correction_enable();
} else {
nrf_rng_error_correction_disable();
}
/* Initialize the user count with zero */
atomic_clear(&DEV_DATA(device)->user_count);
return 0;
}
