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, 72 insertions, 0 deletions

diff --git a/target/linux/generic/pending-4.19/744-net-sfp-move-phy_start-phy_stop-to-phylink.patch b/target/linux/generic/pending-4.19/744-net-sfp-move-phy_start-phy_stop-to-phylink.patch
new file mode 100644
index 0000000000..b3c47a054f
--- /dev/null
+++ b/target/linux/generic/pending-4.19/744-net-sfp-move-phy_start-phy_stop-to-phylink.patch
@@ -0,0 +1,72 @@
+From e2dc261b872a92a055eb2e86ac136baf9b20f2f2 Mon Sep 17 00:00:00 2001
+From: Russell King <rmk+kernel@armlinux.org.uk>
+Date: Thu, 21 Nov 2019 17:21:33 +0000
+Subject: [PATCH 647/660] net: sfp: move phy_start()/phy_stop() to phylink
+
+Move phy_start() and phy_stop() into the module_start and module_stop
+notifications in phylink, rather than having them in the SFP code.
+This gives phylink responsibility for controlling the PHY, rather
+than having SFP start and stop the PHY state machine.
+
+Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
+---
+ drivers/net/phy/phylink.c | 22 ++++++++++++++++++++++
+ drivers/net/phy/sfp.c     |  2 --
+ 2 files changed, 22 insertions(+), 2 deletions(-)
+
+--- a/drivers/net/phy/phylink.c
++++ b/drivers/net/phy/phylink.c
+@@ -1717,6 +1717,26 @@ static int phylink_sfp_module_insert(voi
+ 	return ret;
+ }
+ 
++static int phylink_sfp_module_start(void *upstream)
++{
++	struct phylink *pl = upstream;
++
++	/* If this SFP module has a PHY, start the PHY now. */
++	if (pl->phydev)
++		phy_start(pl->phydev);
++		
++	return 0;
++}
++
++static void phylink_sfp_module_stop(void *upstream)
++{
++	struct phylink *pl = upstream;
++
++	/* If this SFP module has a PHY, stop it. */
++	if (pl->phydev)
++		phy_stop(pl->phydev);
++}
++
+ static void phylink_sfp_link_down(void *upstream)
+ {
+ 	struct phylink *pl = upstream;
+@@ -1752,6 +1772,8 @@ static const struct sfp_upstream_ops sfp
+ 	.attach = phylink_sfp_attach,
+ 	.detach = phylink_sfp_detach,
+ 	.module_insert = phylink_sfp_module_insert,
++	.module_start = phylink_sfp_module_start,
++	.module_stop = phylink_sfp_module_stop,
+ 	.link_up = phylink_sfp_link_up,
+ 	.link_down = phylink_sfp_link_down,
+ 	.connect_phy = phylink_sfp_connect_phy,
+--- a/drivers/net/phy/sfp.c
++++ b/drivers/net/phy/sfp.c
+@@ -1320,7 +1320,6 @@ static void sfp_sm_mod_next(struct sfp *
+ 
+ static void sfp_sm_phy_detach(struct sfp *sfp)
+ {
+-	phy_stop(sfp->mod_phy);
+ 	sfp_remove_phy(sfp->sfp_bus);
+ 	phy_device_remove(sfp->mod_phy);
+ 	phy_device_free(sfp->mod_phy);
+@@ -1351,7 +1350,6 @@ static void sfp_sm_probe_phy(struct sfp
+ 	}
+ 
+ 	sfp->mod_phy = phy;
+-	phy_start(phy);
+ }
+ 
+ static void sfp_sm_link_up(struct sfp *sfp)