diff mbox series

[net-next,07/14] net: phy: at803x: move at8035 specific DT parse to dedicated probe

Message ID 20231129021219.20914-8-ansuelsmth@gmail.com
State New
Headers
Series net: phy: at803x: cleanup + split |

Commit Message

Christian Marangi Nov. 29, 2023, 2:12 a.m. UTC 
  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.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
---
 drivers/net/phy/at803x.c | 62 ++++++++++++++++++++++++++++------------
 1 file changed, 43 insertions(+), 19 deletions(-)

Comments

Andrew Lunn Nov. 30, 2023, 3:29 p.m. UTC | #1 
> +static int at8035_parse_dt(struct phy_device *phydev)
> +{
> +	struct device_node *node = phydev->mdio.dev.of_node;
> +	struct at803x_priv *priv = phydev->priv;
> +	u32 freq;
> +	int ret;
> +
> +	if (!IS_ENABLED(CONFIG_OF_MDIO))
> +		return 0;
> +
> +	ret = of_property_read_u32(node, "qca,clk-out-frequency", &freq);
> +	if (!ret) {

I don't think you need this. priv->clk_25m_reg and priv->clk_25m_mask
will default to 0. If qca,clk-out-frequency does not exist, they will
still be zero....

> +		/* 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;

... so applying a mask to 0 does nothing.

It does change the code a little, but you can add a justification in
the commit message.

    Andrew
diff mbox series

Patch

diff --git a/drivers/net/phy/at803x.c b/drivers/net/phy/at803x.c
index b83422c6db74..e7d006ca1676 100644
--- a/drivers/net/phy/at803x.c
+++ b/drivers/net/phy/at803x.c
@@ -647,23 +647,6 @@  static int at803x_parse_dt(struct phy_device *phydev)
 
 		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);
@@ -1681,6 +1664,47 @@  static int at8031_set_wol(struct phy_device *phydev,
 	return at803x_set_wol(phydev, wol);
 }
 
+static int at8035_parse_dt(struct phy_device *phydev)
+{
+	struct device_node *node = phydev->mdio.dev.of_node;
+	struct at803x_priv *priv = phydev->priv;
+	u32 freq;
+	int ret;
+
+	if (!IS_ENABLED(CONFIG_OF_MDIO))
+		return 0;
+
+	ret = of_property_read_u32(node, "qca,clk-out-frequency", &freq);
+	if (!ret) {
+		/* 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;
+}
+
+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_probe(struct phy_device *phydev)
 {
 	struct device *dev = &phydev->mdio.dev;
@@ -2167,7 +2191,7 @@  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,
@@ -2188,7 +2212,7 @@  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,