linux-kernel - [PATCH net-next v8 8/9] net: phy: migrate phy_init_eee() to genphy_c45_eee_is

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Date:   Sat, 11 Feb 2023 08:41:12 +0100
From:   Oleksij Rempel <o.rempel@...gutronix.de>
To:     Woojung Huh <woojung.huh@...rochip.com>,
        UNGLinuxDriver@...rochip.com, Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        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>, Wei Fang <wei.fang@....com>,
        Heiner Kallweit <hkallweit1@...il.com>
Cc:     Oleksij Rempel <o.rempel@...gutronix.de>, kernel@...gutronix.de,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        Arun.Ramadoss@...rochip.com, intel-wired-lan@...ts.osuosl.org
Subject: [PATCH net-next v8 8/9] net: phy: migrate phy_init_eee() to genphy_c45_eee_is_active()

Reduce code duplicated by migrating phy_init_eee() to
genphy_c45_eee_is_active().

Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>
Reviewed-by: Andrew Lunn <andrew@...n.ch>
---
 drivers/net/phy/phy.c | 89 +++++++------------------------------------
 1 file changed, 14 insertions(+), 75 deletions(-)

diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index 41cfb24c48c1..36533746630e 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -1457,30 +1457,6 @@ void phy_mac_interrupt(struct phy_device *phydev)
 }
 EXPORT_SYMBOL(phy_mac_interrupt);
 
-static void mmd_eee_adv_to_linkmode(unsigned long *advertising, u16 eee_adv)
-{
-	linkmode_zero(advertising);
-
-	if (eee_adv & MDIO_EEE_100TX)
-		linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT,
-				 advertising);
-	if (eee_adv & MDIO_EEE_1000T)
-		linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
-				 advertising);
-	if (eee_adv & MDIO_EEE_10GT)
-		linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
-				 advertising);
-	if (eee_adv & MDIO_EEE_1000KX)
-		linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT,
-				 advertising);
-	if (eee_adv & MDIO_EEE_10GKX4)
-		linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT,
-				 advertising);
-	if (eee_adv & MDIO_EEE_10GKR)
-		linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT,
-				 advertising);
-}
-
 /**
  * phy_init_eee - init and check the EEE feature
  * @phydev: target phy_device struct
@@ -1493,62 +1469,25 @@ static void mmd_eee_adv_to_linkmode(unsigned long *advertising, u16 eee_adv)
  */
 int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable)
 {
+	int ret;
+
 	if (!phydev->drv)
 		return -EIO;
 
-	/* According to 802.3az,the EEE is supported only in full duplex-mode.
-	 */
-	if (phydev->duplex == DUPLEX_FULL) {
-		__ETHTOOL_DECLARE_LINK_MODE_MASK(common);
-		__ETHTOOL_DECLARE_LINK_MODE_MASK(lp);
-		__ETHTOOL_DECLARE_LINK_MODE_MASK(adv);
-		int eee_lp, eee_cap, eee_adv;
-		int status;
-		u32 cap;
-
-		/* Read phy status to properly get the right settings */
-		status = phy_read_status(phydev);
-		if (status)
-			return status;
-
-		/* First check if the EEE ability is supported */
-		eee_cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
-		if (eee_cap <= 0)
-			goto eee_exit_err;
-
-		cap = mmd_eee_cap_to_ethtool_sup_t(eee_cap);
-		if (!cap)
-			goto eee_exit_err;
-
-		/* Check which link settings negotiated and verify it in
-		 * the EEE advertising registers.
-		 */
-		eee_lp = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE);
-		if (eee_lp <= 0)
-			goto eee_exit_err;
-
-		eee_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
-		if (eee_adv <= 0)
-			goto eee_exit_err;
-
-		mmd_eee_adv_to_linkmode(adv, eee_adv);
-		mmd_eee_adv_to_linkmode(lp, eee_lp);
-		linkmode_and(common, adv, lp);
-
-		if (!phy_check_valid(phydev->speed, phydev->duplex, common))
-			goto eee_exit_err;
+	ret = genphy_c45_eee_is_active(phydev, NULL, NULL, NULL);
+	if (ret < 0)
+		return ret;
+	if (!ret)
+		return -EPROTONOSUPPORT;
 
-		if (clk_stop_enable)
-			/* Configure the PHY to stop receiving xMII
-			 * clock while it is signaling LPI.
-			 */
-			phy_set_bits_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1,
-					 MDIO_PCS_CTRL1_CLKSTOP_EN);
+	if (clk_stop_enable)
+		/* Configure the PHY to stop receiving xMII
+		 * clock while it is signaling LPI.
+		 */
+		ret = phy_set_bits_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1,
+				       MDIO_PCS_CTRL1_CLKSTOP_EN);
 
-		return 0; /* EEE supported */
-	}
-eee_exit_err:
-	return -EPROTONOSUPPORT;
+	return ret < 0 ? ret : 0;
 }
 EXPORT_SYMBOL(phy_init_eee);
 
-- 
2.30.2