linux-kernel - [PATCH net-next v2 1/2] net: phy: qcom: qca808x: add helper for checking for 1G only model

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Date: Wed, 28 Feb 2024 18:24:09 +0100
From: Robert Marko <robimarko@...il.com>
To: andersson@...nel.org,
	konrad.dybcio@...aro.org,
	andrew@...n.ch,
	hkallweit1@...il.com,
	linux@...linux.org.uk,
	davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	linux-arm-msm@...r.kernel.org,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Robert Marko <robimarko@...il.com>
Subject: [PATCH net-next v2 1/2] net: phy: qcom: qca808x: add helper for checking for 1G only model

There are 2 versions of QCA808x, one 2.5G capable and one 1G capable.
Currently, this matter only in the .get_features call however, it will
be required for filling supported interface modes so lets add a helper
that can be reused.

Signed-off-by: Robert Marko <robimarko@...il.com>
---
Changes in v2:
* Get rid of the if/else by Russels suggestion

 drivers/net/phy/qcom/qca808x.c | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/drivers/net/phy/qcom/qca808x.c b/drivers/net/phy/qcom/qca808x.c
index 2acf852fb4de..a4c61a8e07c3 100644
--- a/drivers/net/phy/qcom/qca808x.c
+++ b/drivers/net/phy/qcom/qca808x.c
@@ -156,6 +156,17 @@ static bool qca808x_has_fast_retrain_or_slave_seed(struct phy_device *phydev)
 	return linkmode_test_bit(ETHTOOL_LINK_MODE_2500baseT_Full_BIT, phydev->supported);
 }
 
+static bool qca808x_is_1g_only(struct phy_device *phydev)
+{
+	int ret;
+
+	ret = phy_read_mmd(phydev, MDIO_MMD_AN, QCA808X_PHY_MMD7_CHIP_TYPE);
+	if (ret < 0)
+		return true;
+
+	return !!(QCA808X_PHY_CHIP_TYPE_1G & ret);
+}
+
 static int qca808x_probe(struct phy_device *phydev)
 {
 	struct device *dev = &phydev->mdio.dev;
@@ -350,11 +361,7 @@ static int qca808x_get_features(struct phy_device *phydev)
 	 * existed in the bit0 of MMD1.21, we need to remove it manually if
 	 * it is the qca8081 1G chip according to the bit0 of MMD7.0x901d.
 	 */
-	ret = phy_read_mmd(phydev, MDIO_MMD_AN, QCA808X_PHY_MMD7_CHIP_TYPE);
-	if (ret < 0)
-		return ret;
-
-	if (QCA808X_PHY_CHIP_TYPE_1G & ret)
+	if (qca808x_is_1g_only(phydev))
 		linkmode_clear_bit(ETHTOOL_LINK_MODE_2500baseT_Full_BIT, phydev->supported);
 
 	return 0;
-- 
2.44.0