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+From: =?utf-8?b?QXLEsW7DpyDDnE5BTCB2aWEgQjQgUmVsYXk=?=
+ <devnull+arinc.unal.arinc9.com@kernel.org>
+Date: Tue, 30 Apr 2024 08:01:33 +0300
+Subject: [PATCH net-next v2] net: dsa: mt7530: detect PHY muxing when PHY
+ is defined on switch MDIO bus
+Precedence: bulk
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+To: Daniel Golle <daniel@makrotopia.org>, DENG Qingfang <dqfext@gmail.com>,
+ Sean Wang <sean.wang@mediatek.com>, Andrew Lunn <andrew@lunn.ch>,
+ Florian Fainelli <f.fainelli@gmail.com>,
+ Vladimir Oltean <olteanv@gmail.com>,
+ "David S. Miller" <davem@davemloft.net>, Eric Dumazet <edumazet@google.com>,
+ Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
+ Matthias Brugger <matthias.bgg@gmail.com>,
+ AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
+Cc: Bartel Eerdekens <bartel.eerdekens@constell8.be>,
+ mithat.guner@xeront.com, erkin.bozoglu@xeront.com, netdev@vger.kernel.org,
+ linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
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+
+From: Arınç ÜNAL <arinc.unal@arinc9.com>
+
+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>
+---
+Changes in v2:
+- Address the terminology on the patch log.
+- Link to v1: https://lore.kernel.org/r/20240429-b4-for-netnext-mt7530-use-switch-mdio-bus-for-phy-muxing-v1-1-1f775983e155@arinc9.com
+---
+ drivers/net/dsa/mt7530.c | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+
+---
+base-commit: 5c4c0edca68a5841a8d53ccd49596fe199c8334c
+change-id: 20240429-b4-for-netnext-mt7530-use-switch-mdio-bus-for-phy-muxing-586269371c55
+
+Best regards,
+
+--- a/drivers/net/dsa/mt7530.c
++++ b/drivers/net/dsa/mt7530.c
+@@ -2488,7 +2488,8 @@ 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);
--- /dev/null
+From patchwork Tue Apr 30 05:01:33 2024
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+From: =?utf-8?b?QXLEsW7DpyDDnE5BTCB2aWEgQjQgUmVsYXk=?=
+ <devnull+arinc.unal.arinc9.com@kernel.org>
+Date: Tue, 30 Apr 2024 08:01:33 +0300
+Subject: [PATCH net-next v2] net: dsa: mt7530: detect PHY muxing when PHY
+ is defined on switch MDIO bus
+Precedence: bulk
+X-Mailing-List: netdev@vger.kernel.org
+List-Id: <netdev.vger.kernel.org>
+List-Subscribe: <mailto:netdev+subscribe@vger.kernel.org>
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+To: Daniel Golle <daniel@makrotopia.org>, DENG Qingfang <dqfext@gmail.com>,
+ Sean Wang <sean.wang@mediatek.com>, Andrew Lunn <andrew@lunn.ch>,
+ Florian Fainelli <f.fainelli@gmail.com>,
+ Vladimir Oltean <olteanv@gmail.com>,
+ "David S. Miller" <davem@davemloft.net>, Eric Dumazet <edumazet@google.com>,
+ Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
+ Matthias Brugger <matthias.bgg@gmail.com>,
+ AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
+Cc: Bartel Eerdekens <bartel.eerdekens@constell8.be>,
+ mithat.guner@xeront.com, erkin.bozoglu@xeront.com, netdev@vger.kernel.org,
+ linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
+ linux-mediatek@lists.infradead.org,
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+Reply-To: arinc.unal@arinc9.com
+X-Patchwork-Delegate: kuba@kernel.org
+
+From: Arınç ÜNAL <arinc.unal@arinc9.com>
+
+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>
+---
+Changes in v2:
+- Address the terminology on the patch log.
+- Link to v1: https://lore.kernel.org/r/20240429-b4-for-netnext-mt7530-use-switch-mdio-bus-for-phy-muxing-v1-1-1f775983e155@arinc9.com
+---
+ drivers/net/dsa/mt7530.c | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+
+---
+base-commit: 5c4c0edca68a5841a8d53ccd49596fe199c8334c
+change-id: 20240429-b4-for-netnext-mt7530-use-switch-mdio-bus-for-phy-muxing-586269371c55
+
+Best regards,
+
+--- a/drivers/net/dsa/mt7530.c
++++ b/drivers/net/dsa/mt7530.c
+@@ -2483,7 +2483,8 @@ 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);
projects / openwrt / staging / neocturne.git / commitdiff