[PATCH 1/1] net: dsa: yt921x: Fix external port detection
From: Chukun Pan <hidden>
Date: 2026-07-10 10:01:15
Also in:
lkml
Subsystem:
motorcomm yt921x ethernet switch driver, networking drivers, networking [dsa], the rest · Maintainers:
David Yang, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Vladimir Oltean, Linus Torvalds
The YT921x switch has two MAC ports: 8 and 9. Currently, the driver
only allows port 8 as an external port, while port 9 is not working:
yt921x mdio-bus:1d: Wrong mode 23 on port 9
yt921x mdio-bus:1d: Failed to config port 9: -22
Update the external port detection logic to enable the external PHY
connected to port 9.
Fixes: 186623f4aa72 ("net: dsa: yt921x: Add support for Motorcomm YT921x")
Signed-off-by: Chukun Pan <redacted>
---
drivers/net/dsa/yt921x.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/dsa/yt921x.h b/drivers/net/dsa/yt921x.h
index 555046526669..5f3b99e189c4 100644
--- a/drivers/net/dsa/yt921x.h
+++ b/drivers/net/dsa/yt921x.h@@ -854,7 +854,7 @@ enum yt921x_fdb_entry_status { #define YT921X_PORT_NUM 11 #define yt921x_port_is_internal(port) ((port) < 8) -#define yt921x_port_is_external(port) (8 <= (port) && (port) < 9) +#define yt921x_port_is_external(port) ((port) == 8 || (port) == 9) struct yt921x_mib { u64 rx_broadcast;
--
2.34.1