openwrt/target/linux/generic/backport-6.6/707-v6.8-12-net-phy-at803x-move-at8035-specific-DT-parse-to-dedi.patch

From 21a2802a8365cfa82cc02187c1f95136d85592ad Mon Sep 17 00:00:00 2001
From: Christian Marangi <ansuelsmth@gmail.com>
Date: Fri, 8 Dec 2023 15:51:59 +0100
Subject: [PATCH 12/13] net: phy: at803x: move at8035 specific DT parse to
 dedicated probe

Move at8035 specific DT parse for clock out frequency to dedicated probe
to make at803x probe function more generic.

This is to tidy code and no behaviour change are intended.

Detection logic is changed, we check if the clk 25m mask is set and if
it's not zero, we assume the qca,clk-out-frequency property is set.

The property is checked in the generic at803x_parse_dt called by
at803x_probe.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/phy/at803x.c | 60 +++++++++++++++++++++++++++-------------
 1 file changed, 41 insertions(+), 19 deletions(-)

--- a/drivers/net/phy/at803x.c
+++ b/drivers/net/phy/at803x.c
@@ -638,23 +638,6 @@ static int at803x_parse_dt(struct phy_de
 
 		priv->clk_25m_reg |= FIELD_PREP(AT803X_CLK_OUT_MASK, sel);
 		priv->clk_25m_mask |= AT803X_CLK_OUT_MASK;
-
-		/* Fixup for the AR8030/AR8035. This chip has another mask and
-		 * doesn't support the DSP reference. Eg. the lowest bit of the
-		 * mask. The upper two bits select the same frequencies. Mask
-		 * the lowest bit here.
-		 *
-		 * Warning:
-		 *   There was no datasheet for the AR8030 available so this is
-		 *   just a guess. But the AR8035 is listed as pin compatible
-		 *   to the AR8030 so there might be a good chance it works on
-		 *   the AR8030 too.
-		 */
-		if (phydev->drv->phy_id == ATH8030_PHY_ID ||
-		    phydev->drv->phy_id == ATH8035_PHY_ID) {
-			priv->clk_25m_reg &= AT8035_CLK_OUT_MASK;
-			priv->clk_25m_mask &= AT8035_CLK_OUT_MASK;
-		}
 	}
 
 	ret = of_property_read_u32(node, "qca,clk-out-strength", &strength);
@@ -1635,6 +1618,45 @@ static int at8031_config_intr(struct phy
 	return at803x_config_intr(phydev);
 }
 
+static int at8035_parse_dt(struct phy_device *phydev)
+{
+	struct at803x_priv *priv = phydev->priv;
+
+	/* Mask is set by the generic at803x_parse_dt
+	 * if property is set. Assume property is set
+	 * with the mask not zero.
+	 */
+	if (priv->clk_25m_mask) {
+		/* Fixup for the AR8030/AR8035. This chip has another mask and
+		 * doesn't support the DSP reference. Eg. the lowest bit of the
+		 * mask. The upper two bits select the same frequencies. Mask
+		 * the lowest bit here.
+		 *
+		 * Warning:
+		 *   There was no datasheet for the AR8030 available so this is
+		 *   just a guess. But the AR8035 is listed as pin compatible
+		 *   to the AR8030 so there might be a good chance it works on
+		 *   the AR8030 too.
+		 */
+		priv->clk_25m_reg &= AT8035_CLK_OUT_MASK;
+		priv->clk_25m_mask &= AT8035_CLK_OUT_MASK;
+	}
+
+	return 0;
+}
+
+/* AR8030 and AR8035 shared the same special mask for clk_25m */
+static int at8035_probe(struct phy_device *phydev)
+{
+	int ret;
+
+	ret = at803x_probe(phydev);
+	if (ret)
+		return ret;
+
+	return at8035_parse_dt(phydev);
+}
+
 static int qca83xx_config_init(struct phy_device *phydev)
 {
 	u8 switch_revision;
@@ -2107,7 +2129,7 @@ static struct phy_driver at803x_driver[]
 	PHY_ID_MATCH_EXACT(ATH8035_PHY_ID),
 	.name			= "Qualcomm Atheros AR8035",
 	.flags			= PHY_POLL_CABLE_TEST,
-	.probe			= at803x_probe,
+	.probe			= at8035_probe,
 	.config_aneg		= at803x_config_aneg,
 	.config_init		= at803x_config_init,
 	.soft_reset		= genphy_soft_reset,
@@ -2128,7 +2150,7 @@ static struct phy_driver at803x_driver[]
 	.phy_id			= ATH8030_PHY_ID,
 	.name			= "Qualcomm Atheros AR8030",
 	.phy_id_mask		= AT8030_PHY_ID_MASK,
-	.probe			= at803x_probe,
+	.probe			= at8035_probe,
 	.config_init		= at803x_config_init,
 	.link_change_notify	= at803x_link_change_notify,
 	.set_wol		= at803x_set_wol,