* [PATCH 1/1] net: dsa: yt921x: Fix external port detection
@ 2026-07-10 10:00 Chukun Pan
0 siblings, 0 replies; only message in thread
From: Chukun Pan @ 2026-07-10 10:00 UTC (permalink / raw)
To: David Yang
Cc: Andrew Lunn, Paolo Abeni, Jakub Kicinski, Eric Dumazet,
Vladimir Oltean, David S . Miller, linux-kernel, netdev,
Chukun Pan
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 <amadeus@jmu.edu.cn>
---
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
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