netdev - [PATCH net-next V2 1/4] net: lan743x: Create separate PCS power reset function

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Message-ID: <20240716113349.25527-2-Raju.Lakkaraju@microchip.com>
Date: Tue, 16 Jul 2024 17:03:46 +0530
From: Raju Lakkaraju <Raju.Lakkaraju@...rochip.com>
To: <netdev@...r.kernel.org>
CC: <davem@...emloft.net>, <kuba@...nel.org>, <andrew@...n.ch>,
	<horms@...nel.org>, <hkallweit1@...il.com>, <richardcochran@...il.com>,
	<rdunlap@...radead.org>, <linux@...linux.org.uk>,
	<bryan.whitehead@...rochip.com>, <edumazet@...gle.com>, <pabeni@...hat.com>,
	<linux-kernel@...r.kernel.org>, <UNGLinuxDriver@...rochip.com>
Subject: [PATCH net-next V2 1/4] net: lan743x: Create separate PCS power reset function

Create separate PCS power reset function from lan743x_sgmii_config () to use
as subroutine.

Signed-off-by: Raju Lakkaraju <Raju.Lakkaraju@...rochip.com>
---
Change List:
============
V1 -> V2:
  - No changes

 drivers/net/ethernet/microchip/lan743x_main.c | 55 ++++++++++---------
 1 file changed, 29 insertions(+), 26 deletions(-)

diff --git a/drivers/net/ethernet/microchip/lan743x_main.c b/drivers/net/ethernet/microchip/lan743x_main.c
index e418539565b1..ce1e104adc20 100644
--- a/drivers/net/ethernet/microchip/lan743x_main.c
+++ b/drivers/net/ethernet/microchip/lan743x_main.c
@@ -1147,12 +1147,39 @@ static int lan743x_pcs_seq_state(struct lan743x_adapter *adapter, u8 state)
 	return 0;
 }
 
+static int lan743x_pcs_power_reset(struct lan743x_adapter *adapter)
+{
+	int mii_ctl;
+	int ret;
+
+	/* SGMII/1000/2500BASE-X PCS power down */
+	mii_ctl = lan743x_sgmii_read(adapter, MDIO_MMD_VEND2, MII_BMCR);
+	if (mii_ctl < 0)
+		return mii_ctl;
+
+	mii_ctl |= BMCR_PDOWN;
+	ret = lan743x_sgmii_write(adapter, MDIO_MMD_VEND2, MII_BMCR, mii_ctl);
+	if (ret < 0)
+		return ret;
+
+	ret = lan743x_pcs_seq_state(adapter, PCS_POWER_STATE_DOWN);
+	if (ret < 0)
+		return ret;
+
+	/* SGMII/1000/2500BASE-X PCS power up */
+	mii_ctl &= ~BMCR_PDOWN;
+	ret = lan743x_sgmii_write(adapter, MDIO_MMD_VEND2, MII_BMCR, mii_ctl);
+	if (ret < 0)
+		return ret;
+
+	return lan743x_pcs_seq_state(adapter, PCS_POWER_STATE_UP);
+}
+
 static int lan743x_sgmii_config(struct lan743x_adapter *adapter)
 {
 	struct net_device *netdev = adapter->netdev;
 	struct phy_device *phydev = netdev->phydev;
 	enum lan743x_sgmii_lsd lsd = POWER_DOWN;
-	int mii_ctl;
 	bool status;
 	int ret;
 
@@ -1209,31 +1236,7 @@ static int lan743x_sgmii_config(struct lan743x_adapter *adapter)
 		netif_dbg(adapter, drv, adapter->netdev,
 			  "SGMII 1G mode enable\n");
 
-	/* SGMII/1000/2500BASE-X PCS power down */
-	mii_ctl = lan743x_sgmii_read(adapter, MDIO_MMD_VEND2, MII_BMCR);
-	if (mii_ctl < 0)
-		return mii_ctl;
-
-	mii_ctl |= BMCR_PDOWN;
-	ret = lan743x_sgmii_write(adapter, MDIO_MMD_VEND2, MII_BMCR, mii_ctl);
-	if (ret < 0)
-		return ret;
-
-	ret = lan743x_pcs_seq_state(adapter, PCS_POWER_STATE_DOWN);
-	if (ret < 0)
-		return ret;
-
-	/* SGMII/1000/2500BASE-X PCS power up */
-	mii_ctl &= ~BMCR_PDOWN;
-	ret = lan743x_sgmii_write(adapter, MDIO_MMD_VEND2, MII_BMCR, mii_ctl);
-	if (ret < 0)
-		return ret;
-
-	ret = lan743x_pcs_seq_state(adapter, PCS_POWER_STATE_UP);
-	if (ret < 0)
-		return ret;
-
-	return 0;
+	return lan743x_pcs_power_reset(adapter);
 }
 
 static void lan743x_mac_set_address(struct lan743x_adapter *adapter,
-- 
2.34.1