[RFC PATCH net-next 4/8] net: dsa: mt7530: get rid of useless error returns on phylink code path

Arınç ÜNAL posted 8 patches 10 months ago
[RFC PATCH net-next 4/8] net: dsa: mt7530: get rid of useless error returns on phylink code path
Posted by Arınç ÜNAL 10 months ago
Remove error returns on the cases where they are already handled with the
function the mac_port_get_caps member in mt753x_table points to.

mt7531_mac_config() is also called from mt7531_cpu_port_config() outside of
phylink but the port and interface modes are already handled there.

Change the functions and the mac_port_config function pointer to void now
that there're no error returns anymore.

Remove mt753x_is_mac_port() that used to help the said error returns.

On mt7531_mac_config(), switch to if statements to simplify the code.

Remove internal phy cases from mt753x_phylink_mac_config(), there is no
need to check the interface mode as that's already handled with the
function the mac_port_get_caps member in mt753x_table points to.

Signed-off-by: Arınç ÜNAL <arinc.unal@arinc9.com>
Acked-by: Daniel Golle <daniel@makrotopia.org>
Tested-by: Daniel Golle <daniel@makrotopia.org>
Signed-off-by: Arınç ÜNAL <arinc.unal@arinc9.com>
---
 drivers/net/dsa/mt7530.c | 81 ++++++++--------------------------------
 drivers/net/dsa/mt7530.h |  2 +-
 2 files changed, 17 insertions(+), 66 deletions(-)

diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c
index a43178b62817..32db5e14a606 100644
--- a/drivers/net/dsa/mt7530.c
+++ b/drivers/net/dsa/mt7530.c
@@ -2570,7 +2570,7 @@ static void mt7988_mac_port_get_caps(struct dsa_switch *ds, int port,
 	}
 }
 
-static int
+static void
 mt7530_mac_config(struct dsa_switch *ds, int port, unsigned int mode,
 		  phy_interface_t interface)
 {
@@ -2580,22 +2580,14 @@ mt7530_mac_config(struct dsa_switch *ds, int port, unsigned int mode,
 		mt7530_setup_port5(priv->ds, interface);
 	else if (port == 6)
 		mt7530_setup_port6(priv->ds, interface);
-
-	return 0;
 }
 
-static int mt7531_rgmii_setup(struct mt7530_priv *priv, u32 port,
-			      phy_interface_t interface,
-			      struct phy_device *phydev)
+static void mt7531_rgmii_setup(struct mt7530_priv *priv, u32 port,
+			       phy_interface_t interface,
+			       struct phy_device *phydev)
 {
 	u32 val;
 
-	if (priv->p5_sgmii) {
-		dev_err(priv->dev, "RGMII mode is not available for port %d\n",
-			port);
-		return -EINVAL;
-	}
-
 	val = mt7530_read(priv, MT7531_CLKGEN_CTRL);
 	val |= GP_CLK_EN;
 	val &= ~GP_MODE_MASK;
@@ -2623,20 +2615,14 @@ static int mt7531_rgmii_setup(struct mt7530_priv *priv, u32 port,
 		case PHY_INTERFACE_MODE_RGMII_ID:
 			break;
 		default:
-			return -EINVAL;
+			break;
 		}
 	}
-	mt7530_write(priv, MT7531_CLKGEN_CTRL, val);
-
-	return 0;
-}
 
-static bool mt753x_is_mac_port(u32 port)
-{
-	return (port == 5 || port == 6);
+	mt7530_write(priv, MT7531_CLKGEN_CTRL, val);
 }
 
-static int
+static void
 mt7531_mac_config(struct dsa_switch *ds, int port, unsigned int mode,
 		  phy_interface_t interface)
 {
@@ -2644,42 +2630,21 @@ mt7531_mac_config(struct dsa_switch *ds, int port, unsigned int mode,
 	struct phy_device *phydev;
 	struct dsa_port *dp;
 
-	if (!mt753x_is_mac_port(port)) {
-		dev_err(priv->dev, "port %d is not a MAC port\n", port);
-		return -EINVAL;
-	}
-
-	switch (interface) {
-	case PHY_INTERFACE_MODE_RGMII:
-	case PHY_INTERFACE_MODE_RGMII_ID:
-	case PHY_INTERFACE_MODE_RGMII_RXID:
-	case PHY_INTERFACE_MODE_RGMII_TXID:
+	if (phy_interface_mode_is_rgmii(interface)) {
 		dp = dsa_to_port(ds, port);
 		phydev = dp->user->phydev;
-		return mt7531_rgmii_setup(priv, port, interface, phydev);
-	case PHY_INTERFACE_MODE_SGMII:
-	case PHY_INTERFACE_MODE_NA:
-	case PHY_INTERFACE_MODE_1000BASEX:
-	case PHY_INTERFACE_MODE_2500BASEX:
-		/* handled in SGMII PCS driver */
-		return 0;
-	default:
-		return -EINVAL;
+		mt7531_rgmii_setup(priv, port, interface, phydev);
 	}
-
-	return -EINVAL;
 }
 
-static int
+static void
 mt753x_mac_config(struct dsa_switch *ds, int port, unsigned int mode,
 		  const struct phylink_link_state *state)
 {
 	struct mt7530_priv *priv = ds->priv;
 
-	if (!priv->info->mac_port_config)
-		return 0;
-
-	return priv->info->mac_port_config(ds, port, mode, state->interface);
+	if (priv->info->mac_port_config)
+		priv->info->mac_port_config(ds, port, mode, state->interface);
 }
 
 static struct phylink_pcs *
@@ -2708,17 +2673,11 @@ mt753x_phylink_mac_config(struct dsa_switch *ds, int port, unsigned int mode,
 	u32 mcr_cur, mcr_new;
 
 	switch (port) {
-	case 0 ... 4:
-		if (state->interface != PHY_INTERFACE_MODE_GMII &&
-		    state->interface != PHY_INTERFACE_MODE_INTERNAL)
-			goto unsupported;
-		break;
 	case 5:
 		if (priv->p5_interface == state->interface)
 			break;
 
-		if (mt753x_mac_config(ds, port, mode, state) < 0)
-			goto unsupported;
+		mt753x_mac_config(ds, port, mode, state);
 
 		if (priv->p5_intf_sel != P5_DISABLED)
 			priv->p5_interface = state->interface;
@@ -2727,16 +2686,10 @@ mt753x_phylink_mac_config(struct dsa_switch *ds, int port, unsigned int mode,
 		if (priv->p6_interface == state->interface)
 			break;
 
-		if (mt753x_mac_config(ds, port, mode, state) < 0)
-			goto unsupported;
+		mt753x_mac_config(ds, port, mode, state);
 
 		priv->p6_interface = state->interface;
 		break;
-	default:
-unsupported:
-		dev_err(ds->dev, "%s: unsupported %s port: %i\n",
-			__func__, phy_modes(state->interface), port);
-		return;
 	}
 
 	mcr_cur = mt7530_read(priv, MT7530_PMCR_P(port));
@@ -2820,7 +2773,6 @@ mt7531_cpu_port_config(struct dsa_switch *ds, int port)
 	struct mt7530_priv *priv = ds->priv;
 	phy_interface_t interface;
 	int speed;
-	int ret;
 
 	switch (port) {
 	case 5:
@@ -2845,9 +2797,8 @@ mt7531_cpu_port_config(struct dsa_switch *ds, int port)
 	else
 		speed = SPEED_1000;
 
-	ret = mt7531_mac_config(ds, port, MLO_AN_FIXED, interface);
-	if (ret)
-		return ret;
+	mt7531_mac_config(ds, port, MLO_AN_FIXED, interface);
+
 	mt7530_write(priv, MT7530_PMCR_P(port),
 		     PMCR_CPU_PORT_SETTING(priv->id));
 	mt753x_phylink_mac_link_up(ds, port, MLO_AN_FIXED, interface, NULL,
diff --git a/drivers/net/dsa/mt7530.h b/drivers/net/dsa/mt7530.h
index 26a6d2160c08..4b47a5cac848 100644
--- a/drivers/net/dsa/mt7530.h
+++ b/drivers/net/dsa/mt7530.h
@@ -730,7 +730,7 @@ struct mt753x_info {
 	void (*mac_port_validate)(struct dsa_switch *ds, int port,
 				  phy_interface_t interface,
 				  unsigned long *supported);
-	int (*mac_port_config)(struct dsa_switch *ds, int port,
+	void (*mac_port_config)(struct dsa_switch *ds, int port,
 			       unsigned int mode,
 			       phy_interface_t interface);
 };
-- 
2.40.1