From 16e6592cd5c5bd74d8890973489f60176c692614 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ar=C4=B1n=C3=A7=20=C3=9CNAL?= Date: Sun, 28 Apr 2024 12:19:58 +0300 Subject: [PATCH] net: dsa: mt7530: do not set MT7530_P5_DIS when PHY muxing is being used MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit DSA initalises the ds->num_ports amount of ports in dsa_switch_touch_ports(). When the PHY muxing feature is in use, port 5 won't be defined in the device tree. Because of this, the type member of the dsa_port structure for this port will be assigned DSA_PORT_TYPE_UNUSED. The dsa_port_setup() function calls ds->ops->port_disable() when the port type is DSA_PORT_TYPE_UNUSED. The MT7530_P5_DIS bit is unset in mt7530_setup() when PHY muxing is being used. mt7530_port_disable() which is assigned to ds->ops->port_disable() is called afterwards. Currently, mt7530_port_disable() sets MT7530_P5_DIS which breaks network connectivity when PHY muxing is being used. Therefore, do not set MT7530_P5_DIS when PHY muxing is being used. Fixes: 377174c5760c ("net: dsa: mt7530: move MT753X_MTRAP operations for MT7530") Reported-by: Daniel Golle Signed-off-by: Arınç ÜNAL Reviewed-by: Andrew Lunn Link: https://lore.kernel.org/r/20240428-for-netnext-mt7530-do-not-disable-port5-when-phy-muxing-v2-1-bb7c37d293f8@arinc9.com Signed-off-by: Paolo Abeni --- drivers/net/dsa/mt7530.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/drivers/net/dsa/mt7530.c +++ b/drivers/net/dsa/mt7530.c @@ -1220,7 +1220,8 @@ mt7530_port_disable(struct dsa_switch *d if (priv->id != ID_MT7530 && priv->id != ID_MT7621) return; - if (port == 5) + /* Do not set MT7530_P5_DIS when port 5 is being used for PHY muxing. */ + if (port == 5 && priv->p5_mode == GMAC5) mt7530_set(priv, MT753X_MTRAP, MT7530_P5_DIS); else if (port == 6) mt7530_set(priv, MT753X_MTRAP, MT7530_P6_DIS);