drivers: serial: litex: only clear rx pending if needed

maass-hamburg · henrikbrixandersen · commit cf3701ccad6f · 2025-09-12T13:18:30.000+02:00
only clear rx pending if needed

Signed-off-by: Fin Maaß &lt;f.maass@vogl-electronic.com&gt;
diff --git a/drivers/serial/uart_litex.c b/drivers/serial/uart_litex.c
@@ -281,7 +281,7 @@ static void uart_litex_irq_handler(const struct device *dev)
 	}
 
 	/* Clear RX events, TX events still needed to enqueue the next transfer */
-	if (litex_read8(config->rxempty_addr)) {
+	if ((litex_read8(config->ev_pending_addr) & UART_EV_RX) > 0) {
 		litex_write8(UART_EV_RX, config->ev_pending_addr);
 	}
 

Original file line number	Diff line number	Diff line change
`@@ -281,7 +281,7 @@ static void uart_litex_irq_handler(const struct device *dev)`
`281`	`281`	`}`
`282`	`282`
`283`	`283`	`/* Clear RX events, TX events still needed to enqueue the next transfer */`
`284`		`- if (litex_read8(config->rxempty_addr)) {`
	`284`	`+ if ((litex_read8(config->ev_pending_addr) & UART_EV_RX) > 0) {`
`285`	`285`	`litex_write8(UART_EV_RX, config->ev_pending_addr);`
`286`	`286`	`}`
`287`	`287`