kernel: copy kernel 4.19 code to 5.4

No changes were done to the patches while coping them. Currently they do
not apply on top of kernel 5.4.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

1 files changed, 89 insertions, 0 deletions

diff --git a/target/linux/generic/pending-5.4/747-net-phylink-support-Clause-45-PHYs-on-SFP-modules.patch b/target/linux/generic/pending-5.4/747-net-phylink-support-Clause-45-PHYs-on-SFP-modules.patch
new file mode 100644
index 0000000000..2cea118c82
--- /dev/null
+++ b/target/linux/generic/pending-5.4/747-net-phylink-support-Clause-45-PHYs-on-SFP-modules.patch
@@ -0,0 +1,89 @@
+From caf32f96f13df7d3ae6cb8bf8001c88ae22025ca Mon Sep 17 00:00:00 2001
+From: Russell King <rmk+kernel@armlinux.org.uk>
+Date: Fri, 8 Nov 2019 15:28:22 +0000
+Subject: [PATCH 650/660] net: phylink: support Clause 45 PHYs on SFP+ modules
+
+Some SFP+ modules have Clause 45 PHYs embedded on them, which need a
+little more handling in order to ensure that they are correctly setup,
+as they switch the PHY link mode according to the negotiated speed.
+
+With Clause 22 PHYs, we assumed that they would operate in SGMII mode,
+but this assumption is now false.  Adapt phylink to support Clause 45
+PHYs on SFP+ modules.
+
+Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
+---
+ drivers/net/phy/phylink.c | 21 ++++++++++++++++-----
+ 1 file changed, 16 insertions(+), 5 deletions(-)
+
+--- a/drivers/net/phy/phylink.c
++++ b/drivers/net/phy/phylink.c
+@@ -671,7 +671,8 @@ static void phylink_phy_change(struct ph
+ 		   phy_duplex_to_str(phydev->duplex));
+ }
+ 
+-static int phylink_bringup_phy(struct phylink *pl, struct phy_device *phy)
++static int phylink_bringup_phy(struct phylink *pl, struct phy_device *phy,
++			       phy_interface_t interface)
+ {
+ 	struct phylink_link_state config;
+ 	__ETHTOOL_DECLARE_LINK_MODE_MASK(supported);
+@@ -691,7 +692,7 @@ static int phylink_bringup_phy(struct ph
+ 	ethtool_convert_legacy_u32_to_link_mode(supported, phy->supported);
+ 	ethtool_convert_legacy_u32_to_link_mode(config.advertising,
+ 						phy->advertising);
+-	config.interface = pl->link_config.interface;
++	config.interface = interface;
+ 
+ 	ret = phylink_validate(pl, supported, &config);
+ 	if (ret)
+@@ -707,6 +708,7 @@ static int phylink_bringup_phy(struct ph
+ 	mutex_lock(&phy->lock);
+ 	mutex_lock(&pl->state_mutex);
+ 	pl->phydev = phy;
++	pl->phy_state.interface = interface;
+ 	linkmode_copy(pl->supported, supported);
+ 	linkmode_copy(pl->link_config.advertising, config.advertising);
+ 
+@@ -771,7 +773,7 @@ int phylink_connect_phy(struct phylink *
+ 	if (ret < 0)
+ 		return ret;
+ 
+-	ret = phylink_bringup_phy(pl, phy);
++	ret = phylink_bringup_phy(pl, phy, pl->link_config.interface);
+ 	if (ret)
+ 		phy_detach(phy);
+ 
+@@ -824,7 +826,7 @@ int phylink_of_phy_connect(struct phylin
+ 	if (!phy_dev)
+ 		return -ENODEV;
+ 
+-	ret = phylink_bringup_phy(pl, phy_dev);
++	ret = phylink_bringup_phy(pl, phy_dev, pl->link_config.interface);
+ 	if (ret)
+ 		phy_detach(phy_dev);
+ 
+@@ -1759,13 +1761,22 @@ static void phylink_sfp_link_up(void *up
+ static int phylink_sfp_connect_phy(void *upstream, struct phy_device *phy)
+ {
+ 	struct phylink *pl = upstream;
++	phy_interface_t interface = pl->link_config.interface;
+ 	int ret;
+ 
+ 	ret = phylink_attach_phy(pl, phy, pl->link_config.interface);
+ 	if (ret < 0)
+ 		return ret;
+ 
+-	ret = phylink_bringup_phy(pl, phy);
++	/* Clause 45 PHYs switch their Serdes lane between several different
++	 * modes, normally 10GBASE-R, SGMII. Some use 2500BASE-X for 2.5G
++	 * speeds.  We really need to know which interface modes the PHY and
++	 * MAC supports to properly work out which linkmodes can be supported.
++	 */
++	if (phy->is_c45)
++		interface = PHY_INTERFACE_MODE_NA;
++
++	ret = phylink_bringup_phy(pl, phy, interface);
+ 	if (ret)
+ 		phy_detach(phy);
+