From 661413904212a8ac96f13278a627ab3a38e54780 Mon Sep 17 00:00:00 2001
From: Francois Berder <fberder@outlook.fr>
Date: Thu, 21 May 2026 19:52:39 +0200
Subject: serial: sh: Fix dev_read_addr error check

dev_read_addr returns FDT_ADDR_T_NONE (-1) in case of error
and not 0.

Signed-off-by: Francois Berder <fberder@outlook.fr>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Tested-by: Marek Vasut <marek.vasut+renesas@mailbox.org> # R-Car H3/M3-W/M3-N Salvator-X(S), H3/M3-W ULCB, V4H Sparrow Hawk, X5H Ironhide RSIP and CA720AE
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org> # Update subject tags
---
 drivers/serial/serial_sh.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/serial/serial_sh.c b/drivers/serial/serial_sh.c
index bc205234e24..7debff6cb3a 100644
--- a/drivers/serial/serial_sh.c
+++ b/drivers/serial/serial_sh.c
@@ -257,7 +257,7 @@ static int sh_serial_of_to_plat(struct udevice *dev)
 	int ret;
 
 	addr = dev_read_addr(dev);
-	if (!addr)
+	if (addr == FDT_ADDR_T_NONE)
 		return -EINVAL;
 
 	plat->base = addr;
-- 
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