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46 lines
1.9 KiB
Diff
46 lines
1.9 KiB
Diff
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From d8dcf5bd6d0eace9f7c1daa14b63b3925b09d033 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Ar=C4=B1n=C3=A7=20=C3=9CNAL?= <arinc.unal@arinc9.com>
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Date: Tue, 30 Apr 2024 08:01:33 +0300
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Subject: [PATCH] net: dsa: mt7530: detect PHY muxing when PHY is defined on
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switch MDIO bus
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Currently, the MT7530 DSA subdriver configures the MT7530 switch to provide
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direct access to switch PHYs, meaning, the switch PHYs listen on the MDIO
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bus the switch listens on. The PHY muxing feature makes use of this.
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This is problematic as the PHY may be attached before the switch is
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initialised, in which case, the PHY will fail to be attached.
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Since commit 91374ba537bd ("net: dsa: mt7530: support OF-based registration
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of switch MDIO bus"), we can describe the switch PHYs on the MDIO bus of
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the switch on the device tree. Extend the check to detect PHY muxing when
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the PHY is defined on the MDIO bus of the switch on the device tree.
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When the PHY is described this way, the switch will be initialised first,
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then the switch MDIO bus will be registered. Only after these steps, the
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PHY will be attached.
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Signed-off-by: Arınç ÜNAL <arinc.unal@arinc9.com>
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Reviewed-by: Daniel Golle <daniel@makrotopia.org>
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Link: https://lore.kernel.org/r/20240430-b4-for-netnext-mt7530-use-switch-mdio-bus-for-phy-muxing-v2-1-9104d886d0db@arinc9.com
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Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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---
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drivers/net/dsa/mt7530.c | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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--- a/drivers/net/dsa/mt7530.c
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+++ b/drivers/net/dsa/mt7530.c
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@@ -2484,7 +2484,8 @@ mt7530_setup(struct dsa_switch *ds)
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if (!phy_node)
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continue;
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- if (phy_node->parent == priv->dev->of_node->parent) {
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+ if (phy_node->parent == priv->dev->of_node->parent ||
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+ phy_node->parent->parent == priv->dev->of_node) {
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ret = of_get_phy_mode(mac_np, &interface);
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if (ret && ret != -ENODEV) {
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of_node_put(mac_np);
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