linux-kernel - [RFC PATCH net-next 03/12] net: dsa: mt7530: do not run mt7530_setup

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Message-Id: <20230405203859.391267-4-arinc.unal@arinc9.com>
Date:   Wed,  5 Apr 2023 23:38:50 +0300
From:   arinc9.unal@...il.com
To:     René van Dorst <opensource@...rst.com>,
        Sean Wang <sean.wang@...iatek.com>,
        Landen Chao <Landen.Chao@...iatek.com>,
        DENG Qingfang <dqfext@...il.com>,
        Daniel Golle <daniel@...rotopia.org>,
        Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Russell King <linux@...linux.org.uk>
Cc:     Arınç ÜNAL <arinc.unal@...nc9.com>,
        Ilya Lipnitskiy <ilya.lipnitskiy@...il.com>,
        Richard van Schagen <richard@...terhints.com>,
        Richard van Schagen <vschagen@...com>,
        Frank Wunderlich <frank-w@...lic-files.de>,
        erkin.bozoglu@...ont.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: [RFC PATCH net-next 03/12] net: dsa: mt7530: do not run mt7530_setup_port5() if port 5 is disabled

From: Arınç ÜNAL <arinc.unal@...nc9.com>

There's no need to run all the code on mt7530_setup_port5() if port 5 is
disabled. The only case for calling mt7530_setup_port5() from
mt7530_setup() is when PHY muxing is enabled. That is because port 5 is not
defined as a port on the devicetree, therefore, it cannot be controlled by
phylink.

Because of this, run mt7530_setup_port5() if priv->p5_intf_sel is
P5_INTF_SEL_PHY_P0 or P5_INTF_SEL_PHY_P4. Remove the P5_DISABLED case from
mt7530_setup_port5().

Stop initialising the interface variable as the remaining cases will always
call mt7530_setup_port5() with it initialised.

Tested-by: Arınç ÜNAL <arinc.unal@...nc9.com>
Signed-off-by: Arınç ÜNAL <arinc.unal@...nc9.com>
---
 drivers/net/dsa/mt7530.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c
index a00aabe4987e..9ab2e128b564 100644
--- a/drivers/net/dsa/mt7530.c
+++ b/drivers/net/dsa/mt7530.c
@@ -943,9 +943,6 @@ static void mt7530_setup_port5(struct dsa_switch *ds, phy_interface_t interface)
 		/* MT7530_P5_MODE_GMAC: P5 -> External phy or 2nd GMAC */
 		val &= ~MHWTRAP_P5_DIS;
 		break;
-	case P5_DISABLED:
-		interface = PHY_INTERFACE_MODE_NA;
-		break;
 	default:
 		dev_err(ds->dev, "Unsupported p5_intf_sel %d\n",
 			priv->p5_intf_sel);
@@ -2299,7 +2296,6 @@ mt7530_setup(struct dsa_switch *ds)
 		 * if PHY muxing is detected.
 		 */
 		priv->p5_intf_sel = P5_DISABLED;
-		interface = PHY_INTERFACE_MODE_NA;
 
 		for_each_child_of_node(dn, mac_np) {
 			if (!of_device_is_compatible(mac_np,
@@ -2332,7 +2328,9 @@ mt7530_setup(struct dsa_switch *ds)
 			break;
 		}
 
-		mt7530_setup_port5(ds, interface);
+		if (priv->p5_intf_sel == P5_INTF_SEL_PHY_P0 ||
+		    priv->p5_intf_sel == P5_INTF_SEL_PHY_P4)
+			mt7530_setup_port5(ds, interface);
 	}
 
 #ifdef CONFIG_GPIOLIB
-- 
2.37.2