[nrf fromlist] drivers: mbox: nrf_vevif_event_tx: Add barrier after e…

…vent trigger Due to errata 16 VPR is triggering an event and immediately clears that event. There are cases when if APP is sleeping it may not be waken up by that event. Add barrier which fixes the issue (possibly due to increased period when event is set). Upstream PR #: 86249 Signed-off-by: Krzysztof Chruściński <[email protected]>
nrfconnect · Feb 25, 2025 · 98e0524 · 98e0524
1 parent dab6e40
commit 98e0524
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/drivers/mbox/mbox_nrf_vevif_event_tx.c b/drivers/mbox/mbox_nrf_vevif_event_tx.c
@@ -40,6 +40,7 @@ static int vevif_event_tx_send(const struct device *dev, uint32_t id, const stru
 	nrf_vpr_csr_vevif_events_trigger(BIT(id));
 
 #if defined(CONFIG_MBOX_NRF_VEVIF_EVENT_USE_54L_ERRATA_16)
+	nrf_barrier_w();
 	while (!nrf_vpr_csr_vevif_events_get()) {
 		;
 	}