kernel: backport generic phylink validate

Backport generic phylink validate series and make use of it for
mtk_eth_soc Ethernet driver as well as mt7530 DSA driver.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

1 files changed, 166 insertions, 0 deletions

diff --git a/target/linux/generic/backport-5.15/705-02-v5.19-net-dsa-mt7530-populate-supported_interfaces-and-mac.patch b/target/linux/generic/backport-5.15/705-02-v5.19-net-dsa-mt7530-populate-supported_interfaces-and-mac.patch
new file mode 100644
index 0000000000..690cc78fb5
--- /dev/null
+++ b/target/linux/generic/backport-5.15/705-02-v5.19-net-dsa-mt7530-populate-supported_interfaces-and-mac.patch
@@ -0,0 +1,166 @@
+From a1da54bcd664fc27169386db966575675ac3ccb0 Mon Sep 17 00:00:00 2001
+From: "Russell King (Oracle)" <rmk+kernel@armlinux.org.uk>
+Date: Mon, 11 Apr 2022 10:46:01 +0100
+Subject: [PATCH 02/13] net: dsa: mt7530: populate supported_interfaces and
+ mac_capabilities
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Populate the supported interfaces and MAC capabilities for mt7530,
+mt7531 and mt7621 DSA switches. Filling this in will enable phylink
+to pre-check the PHY interface mode against the the supported
+interfaces bitmap prior to calling the validate function, and will
+eventually allow us to convert to using the generic validation.
+
+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 | 74 ++++++++++++++++++++++++++++++++++++++++
+ drivers/net/dsa/mt7530.h |  2 ++
+ 2 files changed, 76 insertions(+)
+
+--- a/drivers/net/dsa/mt7530.c
++++ b/drivers/net/dsa/mt7530.c
+@@ -2385,6 +2385,32 @@ mt7531_setup(struct dsa_switch *ds)
+ 	return 0;
+ }
+ 
++static void mt7530_mac_port_get_caps(struct dsa_switch *ds, int port,
++				     struct phylink_config *config)
++{
++	switch (port) {
++	case 0 ... 4: /* Internal phy */
++		__set_bit(PHY_INTERFACE_MODE_GMII,
++			  config->supported_interfaces);
++		break;
++
++	case 5: /* 2nd cpu port with phy of port 0 or 4 / external phy */
++		phy_interface_set_rgmii(config->supported_interfaces);
++		__set_bit(PHY_INTERFACE_MODE_MII,
++			  config->supported_interfaces);
++		__set_bit(PHY_INTERFACE_MODE_GMII,
++			  config->supported_interfaces);
++		break;
++
++	case 6: /* 1st cpu port */
++		__set_bit(PHY_INTERFACE_MODE_RGMII,
++			  config->supported_interfaces);
++		__set_bit(PHY_INTERFACE_MODE_TRGMII,
++			  config->supported_interfaces);
++		break;
++	}
++}
++
+ static bool
+ mt7530_phy_mode_supported(struct dsa_switch *ds, int port,
+ 			  const struct phylink_link_state *state)
+@@ -2421,6 +2447,37 @@ static bool mt7531_is_rgmii_port(struct
+ 	return (port == 5) && (priv->p5_intf_sel != P5_INTF_SEL_GMAC5_SGMII);
+ }
+ 
++static void mt7531_mac_port_get_caps(struct dsa_switch *ds, int port,
++				     struct phylink_config *config)
++{
++	struct mt7530_priv *priv = ds->priv;
++
++	switch (port) {
++	case 0 ... 4: /* Internal phy */
++		__set_bit(PHY_INTERFACE_MODE_GMII,
++			  config->supported_interfaces);
++		break;
++
++	case 5: /* 2nd cpu port supports either rgmii or sgmii/8023z */
++		if (mt7531_is_rgmii_port(priv, port)) {
++			phy_interface_set_rgmii(config->supported_interfaces);
++			break;
++		}
++		fallthrough;
++
++	case 6: /* 1st cpu port supports sgmii/8023z only */
++		__set_bit(PHY_INTERFACE_MODE_SGMII,
++			  config->supported_interfaces);
++		__set_bit(PHY_INTERFACE_MODE_1000BASEX,
++			  config->supported_interfaces);
++		__set_bit(PHY_INTERFACE_MODE_2500BASEX,
++			  config->supported_interfaces);
++
++		config->mac_capabilities |= MAC_2500FD;
++		break;
++	}
++}
++
+ static bool
+ mt7531_phy_mode_supported(struct dsa_switch *ds, int port,
+ 			  const struct phylink_link_state *state)
+@@ -2899,6 +2956,18 @@ mt7531_cpu_port_config(struct dsa_switch
+ 	return 0;
+ }
+ 
++static void mt753x_phylink_get_caps(struct dsa_switch *ds, int port,
++				    struct phylink_config *config)
++{
++	struct mt7530_priv *priv = ds->priv;
++
++	/* This switch only supports full-duplex at 1Gbps */
++	config->mac_capabilities = MAC_ASYM_PAUSE | MAC_SYM_PAUSE |
++				   MAC_10 | MAC_100 | MAC_1000FD;
++
++	priv->info->mac_port_get_caps(ds, port, config);
++}
++
+ static void
+ mt7530_mac_port_validate(struct dsa_switch *ds, int port,
+ 			 unsigned long *supported)
+@@ -3134,6 +3203,7 @@ static const struct dsa_switch_ops mt753
+ 	.port_vlan_del		= mt7530_port_vlan_del,
+ 	.port_mirror_add	= mt753x_port_mirror_add,
+ 	.port_mirror_del	= mt753x_port_mirror_del,
++	.phylink_get_caps	= mt753x_phylink_get_caps,
+ 	.phylink_validate	= mt753x_phylink_validate,
+ 	.phylink_mac_link_state	= mt753x_phylink_mac_link_state,
+ 	.phylink_mac_config	= mt753x_phylink_mac_config,
+@@ -3151,6 +3221,7 @@ static const struct mt753x_info mt753x_t
+ 		.phy_read = mt7530_phy_read,
+ 		.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,
+@@ -3162,6 +3233,7 @@ static const struct mt753x_info mt753x_t
+ 		.phy_read = mt7530_phy_read,
+ 		.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,
+@@ -3174,6 +3246,7 @@ static const struct mt753x_info mt753x_t
+ 		.phy_write = mt7531_ind_phy_write,
+ 		.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,
+@@ -3236,6 +3309,7 @@ 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)
+--- a/drivers/net/dsa/mt7530.h
++++ b/drivers/net/dsa/mt7530.h
+@@ -769,6 +769,8 @@ struct mt753x_info {
+ 	int (*phy_write)(struct mt7530_priv *priv, int port, int regnum, u16 val);
+ 	int (*pad_setup)(struct dsa_switch *ds, phy_interface_t interface);
+ 	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,