linux-kernel - [net-next: PATCH v7 2/7] dsa: lan9303: move Turbo Mode bit init

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Message-ID: <20230117205703.25960-3-jerry.ray@microchip.com>
Date:   Tue, 17 Jan 2023 14:56:58 -0600
From:   Jerry Ray <jerry.ray@...rochip.com>
To:     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>,
        Russell King <linux@...linux.org.uk>, <jbe@...gutronix.de>,
        <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Jerry Ray <jerry.ray@...rochip.com>
Subject: [net-next: PATCH v7 2/7] dsa: lan9303: move Turbo Mode bit init

In preparing to remove the .adjust_link api, I am moving the one-time
initialization of the device's Turbo Mode bit into a different execution
path. This code clears (disables) the Turbo Mode bit which is never used
by this driver. Turbo Mode is a non-standard mode that would allow the
100Mbps RMII interface to run at 200Mbps.

Signed-off-by: Jerry Ray <jerry.ray@...rochip.com>
---
 drivers/net/dsa/lan9303-core.c | 16 +++++++---------
 1 file changed, 7 insertions(+), 9 deletions(-)

diff --git a/drivers/net/dsa/lan9303-core.c b/drivers/net/dsa/lan9303-core.c
index f8f6f79052e3..63f5c1ef65e2 100644
--- a/drivers/net/dsa/lan9303-core.c
+++ b/drivers/net/dsa/lan9303-core.c
@@ -902,6 +902,7 @@ static int lan9303_setup(struct dsa_switch *ds)
 {
 	struct lan9303 *chip = ds->priv;
 	int ret;
+	u32 reg;
 
 	/* Make sure that port 0 is the cpu port */
 	if (!dsa_is_cpu_port(ds, 0)) {
@@ -909,6 +910,12 @@ static int lan9303_setup(struct dsa_switch *ds)
 		return -EINVAL;
 	}
 
+	/* Virtual Phy: Remove Turbo 200Mbit mode */
+	lan9303_read(chip->regmap, LAN9303_VIRT_SPECIAL_CTRL, &reg);
+
+	reg &= ~LAN9303_VIRT_SPECIAL_TURBO;
+	regmap_write(chip->regmap, LAN9303_VIRT_SPECIAL_CTRL, reg);
+
 	ret = lan9303_setup_tagging(chip);
 	if (ret)
 		dev_err(chip->dev, "failed to setup port tagging %d\n", ret);
@@ -1052,7 +1059,6 @@ static int lan9303_phy_write(struct dsa_switch *ds, int phy, int regnum,
 static void lan9303_adjust_link(struct dsa_switch *ds, int port,
 				struct phy_device *phydev)
 {
-	struct lan9303 *chip = ds->priv;
 	int ctl;
 
 	if (!phy_is_pseudo_fixed_link(phydev))
@@ -1075,14 +1081,6 @@ static void lan9303_adjust_link(struct dsa_switch *ds, int port,
 		ctl &= ~BMCR_FULLDPLX;
 
 	lan9303_phy_write(ds, port, MII_BMCR, ctl);
-
-	if (port == chip->phy_addr_base) {
-		/* Virtual Phy: Remove Turbo 200Mbit mode */
-		lan9303_read(chip->regmap, LAN9303_VIRT_SPECIAL_CTRL, &ctl);
-
-		ctl &= ~LAN9303_VIRT_SPECIAL_TURBO;
-		regmap_write(chip->regmap, LAN9303_VIRT_SPECIAL_CTRL, ctl);
-	}
 }
 
 static int lan9303_port_enable(struct dsa_switch *ds, int port,
-- 
2.17.1