kernel: add SFP support for Methode DM7052 NBASE-T module

Add support for Methode DM7052 NBASE-T module to OpenWRT. These
patches are taken from my "phy" branch, and will be sent for the
next kernel merge window.

Signed-off-by: Russell King <linux@armlinux.org.uk>
[jonas.gorski: move patches to pending, refresh patches]
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>

1 files changed, 89 insertions, 0 deletions

diff --git a/target/linux/generic/pending-4.19/741-net-sfp-derive-interface-mode-from-ethtool-link-mode.patch b/target/linux/generic/pending-4.19/741-net-sfp-derive-interface-mode-from-ethtool-link-mode.patch
new file mode 100644
index 0000000000..f20b66eae7
--- /dev/null
+++ b/target/linux/generic/pending-4.19/741-net-sfp-derive-interface-mode-from-ethtool-link-mode.patch
@@ -0,0 +1,89 @@
+From dc45d9e04572b5cd6d32f51cdf9f62b18022e6dd Mon Sep 17 00:00:00 2001
+From: Russell King <rmk+kernel@armlinux.org.uk>
+Date: Thu, 21 Nov 2019 17:32:59 +0000
+Subject: [PATCH 644/660] net: sfp: derive interface mode from ethtool link
+ modes
+
+We don't need the EEPROM ID to derive the phy interface mode as we can
+derive it merely from the ethtool link modes.  Remove the EEPROM ID
+argument to sfp_select_interface().
+
+Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
+---
+ drivers/net/phy/marvell10g.c |  2 +-
+ drivers/net/phy/phylink.c    |  2 +-
+ drivers/net/phy/sfp-bus.c    | 11 ++++-------
+ include/linux/sfp.h          |  2 --
+ 4 files changed, 6 insertions(+), 11 deletions(-)
+
+--- a/drivers/net/phy/marvell10g.c
++++ b/drivers/net/phy/marvell10g.c
+@@ -227,7 +227,7 @@ static int mv3310_sfp_insert(void *upstr
+ 	phy_interface_t iface;
+ 
+ 	sfp_parse_support(phydev->sfp_bus, id, support);
+-	iface = sfp_select_interface(phydev->sfp_bus, id, support);
++	iface = sfp_select_interface(phydev->sfp_bus, support);
+ 
+ 	if (iface != PHY_INTERFACE_MODE_10GKR) {
+ 		dev_err(&phydev->mdio.dev, "incompatible SFP module inserted\n");
+--- a/drivers/net/phy/phylink.c
++++ b/drivers/net/phy/phylink.c
+@@ -1663,7 +1663,7 @@ static int phylink_sfp_module_insert(voi
+ 
+ 	linkmode_copy(support1, support);
+ 
+-	iface = sfp_select_interface(pl->sfp_bus, id, config.advertising);
++	iface = sfp_select_interface(pl->sfp_bus, config.advertising);
+ 	if (iface == PHY_INTERFACE_MODE_NA) {
+ 		netdev_err(pl->netdev,
+ 			   "selection of interface failed, advertisement %*pb\n",
+--- a/drivers/net/phy/sfp-bus.c
++++ b/drivers/net/phy/sfp-bus.c
+@@ -319,16 +319,12 @@ EXPORT_SYMBOL_GPL(sfp_parse_support);
+ /**
+  * sfp_select_interface() - Select appropriate phy_interface_t mode
+  * @bus: a pointer to the &struct sfp_bus structure for the sfp module
+- * @id: a pointer to the module's &struct sfp_eeprom_id
+  * @link_modes: ethtool link modes mask
+  *
+- * Derive the phy_interface_t mode for the information found in the
+- * module's identifying EEPROM and the link modes mask. There is no
+- * standard or defined way to derive this information, so we decide
+- * based upon the link mode mask.
++ * Derive the phy_interface_t mode for the SFP module from the link
++ * modes mask.
+  */
+ phy_interface_t sfp_select_interface(struct sfp_bus *bus,
+-				     const struct sfp_eeprom_id *id,
+ 				     unsigned long *link_modes)
+ {
+ 	if (phylink_test(link_modes, 10000baseCR_Full) ||
+@@ -341,7 +337,8 @@ phy_interface_t sfp_select_interface(str
+ 	if (phylink_test(link_modes, 2500baseX_Full))
+ 		return PHY_INTERFACE_MODE_2500BASEX;
+ 
+-	if (id->base.e1000_base_t)
++	if (phylink_test(link_modes, 1000baseT_Half) ||
++	    phylink_test(link_modes, 1000baseT_Full))
+ 		return PHY_INTERFACE_MODE_SGMII;
+ 
+ 	if (phylink_test(link_modes, 1000baseX_Full))
+--- a/include/linux/sfp.h
++++ b/include/linux/sfp.h
+@@ -504,7 +504,6 @@ int sfp_parse_port(struct sfp_bus *bus,
+ void sfp_parse_support(struct sfp_bus *bus, const struct sfp_eeprom_id *id,
+ 		       unsigned long *support);
+ phy_interface_t sfp_select_interface(struct sfp_bus *bus,
+-				     const struct sfp_eeprom_id *id,
+ 				     unsigned long *link_modes);
+ 
+ int sfp_get_module_info(struct sfp_bus *bus, struct ethtool_modinfo *modinfo);
+@@ -532,7 +531,6 @@ static inline void sfp_parse_support(str
+ }
+ 
+ static inline phy_interface_t sfp_select_interface(struct sfp_bus *bus,
+-						   const struct sfp_eeprom_id *id,
+ 						   unsigned long *link_modes)
+ {
+ 	return PHY_INTERFACE_MODE_NA;