net: dsa: mt7530: remove interface checks

As phylink checks the interface mode against the supported_interfaces
bitmap, we no longer need to validate the interface mode, nor handle
PHY_INTERFACE_MODE_NA in the validation function. Remove these to
simplify the implementation.
Tested-by: Marek Behún <kabel@kernel.org>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

drivers/net/dsa/mt7530.c

@@ -2415,37 +2415,6 @@ static void mt7530_mac_port_get_caps(struct dsa_switch *ds, int port,
 	}
 }
 
-static bool
-mt7530_phy_mode_supported(struct dsa_switch *ds, int port,
-			  const struct phylink_link_state *state)
-{
-	struct mt7530_priv *priv = ds->priv;
-
-	switch (port) {
-	case 0 ... 4: /* Internal phy */
-		if (state->interface != PHY_INTERFACE_MODE_GMII)
-			return false;
-		break;
-	case 5: /* 2nd cpu port with phy of port 0 or 4 / external phy */
-		if (!phy_interface_mode_is_rgmii(state->interface) &&
-		    state->interface != PHY_INTERFACE_MODE_MII &&
-		    state->interface != PHY_INTERFACE_MODE_GMII)
-			return false;
-		break;
-	case 6: /* 1st cpu port */
-		if (state->interface != PHY_INTERFACE_MODE_RGMII &&
-		    state->interface != PHY_INTERFACE_MODE_TRGMII)
-			return false;
-		break;
-	default:
-		dev_err(priv->dev, "%s: unsupported port: %i\n", __func__,
-			port);
-		return false;
-	}
-
-	return true;
-}
-
 static bool mt7531_is_rgmii_port(struct mt7530_priv *priv, u32 port)
 {
 	return (port == 5) && (priv->p5_intf_sel != P5_INTF_SEL_GMAC5_SGMII);
@@ -2482,44 +2451,6 @@ static void mt7531_mac_port_get_caps(struct dsa_switch *ds, int port,
 	}
 }
 
-static bool
-mt7531_phy_mode_supported(struct dsa_switch *ds, int port,
-			  const struct phylink_link_state *state)
-{
-	struct mt7530_priv *priv = ds->priv;
-
-	switch (port) {
-	case 0 ... 4: /* Internal phy */
-		if (state->interface != PHY_INTERFACE_MODE_GMII)
-			return false;
-		break;
-	case 5: /* 2nd cpu port supports either rgmii or sgmii/8023z */
-		if (mt7531_is_rgmii_port(priv, port))
-			return phy_interface_mode_is_rgmii(state->interface);
-		fallthrough;
-	case 6: /* 1st cpu port supports sgmii/8023z only */
-		if (state->interface != PHY_INTERFACE_MODE_SGMII &&
-		    !phy_interface_mode_is_8023z(state->interface))
-			return false;
-		break;
-	default:
-		dev_err(priv->dev, "%s: unsupported port: %i\n", __func__,
-			port);
-		return false;
-	}
-
-	return true;
-}
-
-static bool
-mt753x_phy_mode_supported(struct dsa_switch *ds, int port,
-			  const struct phylink_link_state *state)
-{
-	struct mt7530_priv *priv = ds->priv;
-
-	return priv->info->phy_mode_supported(ds, port, state);
-}
-
 static int
 mt753x_pad_setup(struct dsa_switch *ds, const struct phylink_link_state *state)
 {
@@ -2774,9 +2705,6 @@ mt753x_phylink_mac_config(struct dsa_switch *ds, int port, unsigned int mode,
 	struct mt7530_priv *priv = ds->priv;
 	u32 mcr_cur, mcr_new;
 
-	if (!mt753x_phy_mode_supported(ds, port, state))
-		goto unsupported;
-
 	switch (port) {
 	case 0 ... 4: /* Internal phy */
 		if (state->interface != PHY_INTERFACE_MODE_GMII)
@@ -2994,12 +2922,6 @@ mt753x_phylink_validate(struct dsa_switch *ds, int port,
 	__ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, };
 	struct mt7530_priv *priv = ds->priv;
 
-	if (state->interface != PHY_INTERFACE_MODE_NA &&
-	    !mt753x_phy_mode_supported(ds, port, state)) {
-		linkmode_zero(supported);
-		return;
-	}
-
 	phylink_set_port_modes(mask);
 
 	if (state->interface != PHY_INTERFACE_MODE_TRGMII &&
@@ -3226,7 +3148,6 @@ static const struct mt753x_info mt753x_table[] = {
 		.phy_write = mt7530_phy_write,
 		.pad_setup = mt7530_pad_clk_setup,
 		.mac_port_get_caps = mt7530_mac_port_get_caps,
-		.phy_mode_supported = mt7530_phy_mode_supported,
 		.mac_port_validate = mt7530_mac_port_validate,
 		.mac_port_get_state = mt7530_phylink_mac_link_state,
 		.mac_port_config = mt7530_mac_config,
@@ -3238,7 +3159,6 @@ static const struct mt753x_info mt753x_table[] = {
 		.phy_write = mt7530_phy_write,
 		.pad_setup = mt7530_pad_clk_setup,
 		.mac_port_get_caps = mt7530_mac_port_get_caps,
-		.phy_mode_supported = mt7530_phy_mode_supported,
 		.mac_port_validate = mt7530_mac_port_validate,
 		.mac_port_get_state = mt7530_phylink_mac_link_state,
 		.mac_port_config = mt7530_mac_config,
@@ -3251,7 +3171,6 @@ static const struct mt753x_info mt753x_table[] = {
 		.pad_setup = mt7531_pad_setup,
 		.cpu_port_config = mt7531_cpu_port_config,
 		.mac_port_get_caps = mt7531_mac_port_get_caps,
-		.phy_mode_supported = mt7531_phy_mode_supported,
 		.mac_port_validate = mt7531_mac_port_validate,
 		.mac_port_get_state = mt7531_phylink_mac_link_state,
 		.mac_port_config = mt7531_mac_config,
@@ -3314,7 +3233,6 @@ mt7530_probe(struct mdio_device *mdiodev)
 	if (!priv->info->sw_setup || !priv->info->pad_setup ||
 	    !priv->info->phy_read || !priv->info->phy_write ||
 	    !priv->info->mac_port_get_caps ||
-	    !priv->info->phy_mode_supported ||
 	    !priv->info->mac_port_validate ||
 	    !priv->info->mac_port_get_state || !priv->info->mac_port_config)
 		return -EINVAL;

drivers/net/dsa/mt7530.h

@@ -771,8 +771,6 @@ struct mt753x_info {
 	int (*cpu_port_config)(struct dsa_switch *ds, int port);
 	void (*mac_port_get_caps)(struct dsa_switch *ds, int port,
 				  struct phylink_config *config);
-	bool (*phy_mode_supported)(struct dsa_switch *ds, int port,
-				   const struct phylink_link_state *state);
 	void (*mac_port_validate)(struct dsa_switch *ds, int port,
 				  unsigned long *supported);
 	int (*mac_port_get_state)(struct dsa_switch *ds, int port,