diff options
Diffstat (limited to 'target/linux/generic/backport-6.6/790-54-v6.10-796-net-dsa-mt7530-detect-PHY-muxing-when-PHY-is-defined.patch')
| -rw-r--r-- | target/linux/generic/backport-6.6/790-54-v6.10-796-net-dsa-mt7530-detect-PHY-muxing-when-PHY-is-defined.patch | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/target/linux/generic/backport-6.6/790-54-v6.10-796-net-dsa-mt7530-detect-PHY-muxing-when-PHY-is-defined.patch b/target/linux/generic/backport-6.6/790-54-v6.10-796-net-dsa-mt7530-detect-PHY-muxing-when-PHY-is-defined.patch new file mode 100644 index 0000000000..d369c4e05e --- /dev/null +++ b/target/linux/generic/backport-6.6/790-54-v6.10-796-net-dsa-mt7530-detect-PHY-muxing-when-PHY-is-defined.patch @@ -0,0 +1,45 @@ +From d8dcf5bd6d0eace9f7c1daa14b63b3925b09d033 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Ar=C4=B1n=C3=A7=20=C3=9CNAL?= <arinc.unal@arinc9.com> +Date: Tue, 30 Apr 2024 08:01:33 +0300 +Subject: [PATCH] net: dsa: mt7530: detect PHY muxing when PHY is defined on + switch MDIO bus +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Currently, the MT7530 DSA subdriver configures the MT7530 switch to provide +direct access to switch PHYs, meaning, the switch PHYs listen on the MDIO +bus the switch listens on. The PHY muxing feature makes use of this. + +This is problematic as the PHY may be attached before the switch is +initialised, in which case, the PHY will fail to be attached. + +Since commit 91374ba537bd ("net: dsa: mt7530: support OF-based registration +of switch MDIO bus"), we can describe the switch PHYs on the MDIO bus of +the switch on the device tree. Extend the check to detect PHY muxing when +the PHY is defined on the MDIO bus of the switch on the device tree. + +When the PHY is described this way, the switch will be initialised first, +then the switch MDIO bus will be registered. Only after these steps, the +PHY will be attached. + +Signed-off-by: Arınç ÜNAL <arinc.unal@arinc9.com> +Reviewed-by: Daniel Golle <daniel@makrotopia.org> +Link: https://lore.kernel.org/r/20240430-b4-for-netnext-mt7530-use-switch-mdio-bus-for-phy-muxing-v2-1-9104d886d0db@arinc9.com +Signed-off-by: Paolo Abeni <pabeni@redhat.com> +--- + 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 +@@ -2484,7 +2484,8 @@ mt7530_setup(struct dsa_switch *ds) + if (!phy_node) + continue; + +- if (phy_node->parent == priv->dev->of_node->parent) { ++ if (phy_node->parent == priv->dev->of_node->parent || ++ phy_node->parent->parent == priv->dev->of_node) { + ret = of_get_phy_mode(mac_np, &interface); + if (ret && ret != -ENODEV) { + of_node_put(mac_np); |