[nrf fromlist] drivers: mbox: nrf_vevif_event_tx: Fix errata 16 workaround

nordic-krch · rlubos · commit 1bf500b0c51d · 2025-02-26T12:46:19.000+01:00
Pend until requested event is set before clearing it. Without that
check event could be cleared too early and APP core is not waken up.

Upstream PR #: 86249

Signed-off-by: Krzysztof Chruściński &lt;krzysztof.chruscinski@nordicsemi.no&gt;
diff --git a/drivers/mbox/mbox_nrf_vevif_event_tx.c b/drivers/mbox/mbox_nrf_vevif_event_tx.c
@@ -40,7 +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)
-	while (!nrf_vpr_csr_vevif_events_get()) {
+	while (!(nrf_vpr_csr_vevif_events_get() & BIT(id))) {
 		;
 	}
 	nrf_vpr_csr_vevif_events_set(0);

Original file line number	Diff line number	Diff line change
`@@ -40,7 +40,7 @@ static int vevif_event_tx_send(const struct device *dev, uint32_t id, const stru`
`40`	`40`	`nrf_vpr_csr_vevif_events_trigger(BIT(id));`
`41`	`41`
`42`	`42`	`#if defined(CONFIG_MBOX_NRF_VEVIF_EVENT_USE_54L_ERRATA_16)`
`43`		`- while (!nrf_vpr_csr_vevif_events_get()) {`
	`43`	`+ while (!(nrf_vpr_csr_vevif_events_get() & BIT(id))) {`
`44`	`44`	`;`
`45`	`45`	`}`
`46`	`46`	`nrf_vpr_csr_vevif_events_set(0);`