netdev - [PATCH RESEND v2 1/2] net: phy: at803x: fix the wol setting functions

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Date:   Tue, 28 Feb 2023 21:01:25 -0600
From:   Li Yang <leoyang.li@....com>
To:     Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        David Bauer <mail@...id-bauer.net>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Li Yang <leoyang.li@....com>,
        Viorel Suman <viorel.suman@....com>,
        Wei Fang <wei.fang@....com>
Subject: [PATCH RESEND v2 1/2] net: phy: at803x: fix the wol setting functions

In 7beecaf7d507 ("net: phy: at803x: improve the WOL feature"), it seems
not correct to use a wol_en bit in a 1588 Control Register which is only
available on AR8031/AR8033(share the same phy_id) to determine if WoL is
enabled.  Change it back to use AT803X_INTR_ENABLE_WOL for determining
the WoL status which is applicable on all chips supporting wol. Also
update the at803x_set_wol() function to only update the 1588 register on
chips having it.  After this change, disabling wol at probe from
d7cd5e06c9dd ("net: phy: at803x: disable WOL at probe") is no longer
needed.  So that part is removed.

Fixes: 7beecaf7d507b ("net: phy: at803x: improve the WOL feature")
Signed-off-by: Li Yang <leoyang.li@....com>
Reviewed-by: Viorel Suman <viorel.suman@....com>
Reviewed-by: Wei Fang <wei.fang@....com>
---
 drivers/net/phy/at803x.c | 40 ++++++++++++++++------------------------
 1 file changed, 16 insertions(+), 24 deletions(-)

diff --git a/drivers/net/phy/at803x.c b/drivers/net/phy/at803x.c
index 22f4458274aa..2102279b3964 100644
--- a/drivers/net/phy/at803x.c
+++ b/drivers/net/phy/at803x.c
@@ -461,21 +461,25 @@ static int at803x_set_wol(struct phy_device *phydev,
 			phy_write_mmd(phydev, MDIO_MMD_PCS, offsets[i],
 				      mac[(i * 2) + 1] | (mac[(i * 2)] << 8));
 
-		/* Enable WOL function */
-		ret = phy_modify_mmd(phydev, MDIO_MMD_PCS, AT803X_PHY_MMD3_WOL_CTRL,
-				0, AT803X_WOL_EN);
-		if (ret)
-			return ret;
+		/* Enable WOL function for 1588 */
+		if (phydev->drv->phy_id == ATH8031_PHY_ID) {
+			ret = phy_modify_mmd(phydev, MDIO_MMD_PCS, AT803X_PHY_MMD3_WOL_CTRL,
+					0, AT803X_WOL_EN);
+			if (ret)
+				return ret;
+		}
 		/* Enable WOL interrupt */
 		ret = phy_modify(phydev, AT803X_INTR_ENABLE, 0, AT803X_INTR_ENABLE_WOL);
 		if (ret)
 			return ret;
 	} else {
-		/* Disable WoL function */
-		ret = phy_modify_mmd(phydev, MDIO_MMD_PCS, AT803X_PHY_MMD3_WOL_CTRL,
-				AT803X_WOL_EN, 0);
-		if (ret)
-			return ret;
+		/* Disable WoL function for 1588 */
+		if (phydev->drv->phy_id == ATH8031_PHY_ID) {
+			ret = phy_modify_mmd(phydev, MDIO_MMD_PCS, AT803X_PHY_MMD3_WOL_CTRL,
+					AT803X_WOL_EN, 0);
+			if (ret)
+				return ret;
+		}
 		/* Disable WOL interrupt */
 		ret = phy_modify(phydev, AT803X_INTR_ENABLE, AT803X_INTR_ENABLE_WOL, 0);
 		if (ret)
@@ -510,11 +514,8 @@ static void at803x_get_wol(struct phy_device *phydev,
 	wol->supported = WAKE_MAGIC;
 	wol->wolopts = 0;
 
-	value = phy_read_mmd(phydev, MDIO_MMD_PCS, AT803X_PHY_MMD3_WOL_CTRL);
-	if (value < 0)
-		return;
-
-	if (value & AT803X_WOL_EN)
+	value = phy_read(phydev, AT803X_INTR_ENABLE);
+	if (value & AT803X_INTR_ENABLE_WOL)
 		wol->wolopts |= WAKE_MAGIC;
 }
 
@@ -866,9 +867,6 @@ static int at803x_probe(struct phy_device *phydev)
 	if (phydev->drv->phy_id == ATH8031_PHY_ID) {
 		int ccr = phy_read(phydev, AT803X_REG_CHIP_CONFIG);
 		int mode_cfg;
-		struct ethtool_wolinfo wol = {
-			.wolopts = 0,
-		};
 
 		if (ccr < 0) {
 			ret = ccr;
@@ -887,12 +885,6 @@ static int at803x_probe(struct phy_device *phydev)
 			break;
 		}
 
-		/* Disable WOL by default */
-		ret = at803x_set_wol(phydev, &wol);
-		if (ret < 0) {
-			phydev_err(phydev, "failed to disable WOL on probe: %d\n", ret);
-			goto err;
-		}
 	}
 
 	return 0;
-- 
2.38.0