ramips: add support for kernel 5.10

Enable testing kernel.

Delete upstreamed patches:
 0098-disable_cm.patch can be dropped, upstream fixed CM handling.

Fix compile errors by using new kernel APIs.

Fix fuzz by manually editing patches to ensure the code goes in the
right place.

For 721-NET-no-auto-carrier-off-support.patch, revert upstream commit
a307593a6 to keep the OpenWrt ralink driver operational.

Add mt7621-pci-phy patch to select REGMAP_MMIO as discussed in PR #3693
and #3952.

Rename patches to follow the 3-digit classification from the OpenWrt
Developer Guide.

Run automatic quilt refresh.

Signed-off-by: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>

1 files changed, 118 insertions, 0 deletions

diff --git a/target/linux/ramips/patches-5.10/720-Revert-net-phy-simplify-phy_link_change-arguments.patch b/target/linux/ramips/patches-5.10/720-Revert-net-phy-simplify-phy_link_change-arguments.patch
new file mode 100644
index 0000000000..c53b11ea31
--- /dev/null
+++ b/target/linux/ramips/patches-5.10/720-Revert-net-phy-simplify-phy_link_change-arguments.patch
@@ -0,0 +1,118 @@
+From ffbb1b37a3e1ce1a5c574a6bd4f5aede8bc468ac Mon Sep 17 00:00:00 2001
+From: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>
+Date: Sat, 27 Feb 2021 20:20:07 -0800
+Subject: [PATCH] Revert "net: phy: simplify phy_link_change arguments"
+
+This reverts commit a307593a644443db12888f45eed0dafb5869e2cc.
+
+This brings back the do_carrier flags used by the (hacky) next patch,
+still required by target/linux/ramips/files/drivers/net/ethernet/ralink/mdio.c
+---
+ drivers/net/phy/phy.c        | 12 ++++++------
+ drivers/net/phy/phy_device.c | 12 +++++++-----
+ drivers/net/phy/phylink.c    |  3 ++-
+ include/linux/phy.h          |  2 +-
+ 4 files changed, 16 insertions(+), 13 deletions(-)
+
+--- a/drivers/net/phy/phy.c
++++ b/drivers/net/phy/phy.c
+@@ -58,13 +58,13 @@ static const char *phy_state_to_str(enum
+ 
+ static void phy_link_up(struct phy_device *phydev)
+ {
+-	phydev->phy_link_change(phydev, true);
++	phydev->phy_link_change(phydev, true, true);
+ 	phy_led_trigger_change_speed(phydev);
+ }
+ 
+-static void phy_link_down(struct phy_device *phydev)
++static void phy_link_down(struct phy_device *phydev, bool do_carrier)
+ {
+-	phydev->phy_link_change(phydev, false);
++	phydev->phy_link_change(phydev, false, do_carrier);
+ 	phy_led_trigger_change_speed(phydev);
+ }
+ 
+@@ -616,7 +616,7 @@ int phy_start_cable_test(struct phy_devi
+ 		goto out;
+ 
+ 	/* Mark the carrier down until the test is complete */
+-	phy_link_down(phydev);
++	phy_link_down(phydev, true);
+ 
+ 	netif_testing_on(dev);
+ 	err = phydev->drv->cable_test_start(phydev);
+@@ -687,7 +687,7 @@ int phy_start_cable_test_tdr(struct phy_
+ 		goto out;
+ 
+ 	/* Mark the carrier down until the test is complete */
+-	phy_link_down(phydev);
++	phy_link_down(phydev, true);
+ 
+ 	netif_testing_on(dev);
+ 	err = phydev->drv->cable_test_tdr_start(phydev, config);
+@@ -758,7 +758,7 @@ static int phy_check_link_status(struct
+ 		phy_link_up(phydev);
+ 	} else if (!phydev->link && phydev->state != PHY_NOLINK) {
+ 		phydev->state = PHY_NOLINK;
+-		phy_link_down(phydev);
++		phy_link_down(phydev, true);
+ 	}
+ 
+ 	return 0;
+@@ -1162,7 +1162,7 @@ void phy_state_machine(struct work_struc
+ 	case PHY_HALTED:
+ 		if (phydev->link) {
+ 			phydev->link = 0;
+-			phy_link_down(phydev);
++			phy_link_down(phydev, true);
+ 		}
+ 		do_suspend = true;
+ 		break;
+--- a/drivers/net/phy/phy_device.c
++++ b/drivers/net/phy/phy_device.c
+@@ -937,14 +937,16 @@ struct phy_device *phy_find_first(struct
+ }
+ EXPORT_SYMBOL(phy_find_first);
+ 
+-static void phy_link_change(struct phy_device *phydev, bool up)
++static void phy_link_change(struct phy_device *phydev, bool up, bool do_carrier)
+ {
+ 	struct net_device *netdev = phydev->attached_dev;
+ 
+-	if (up)
+-		netif_carrier_on(netdev);
+-	else
+-		netif_carrier_off(netdev);
++	if (do_carrier) {
++		if (up)
++			netif_carrier_on(netdev);
++		else
++			netif_carrier_off(netdev);
++	}
+ 	phydev->adjust_link(netdev);
+ 	if (phydev->mii_ts && phydev->mii_ts->link_state)
+ 		phydev->mii_ts->link_state(phydev->mii_ts, phydev);
+--- a/drivers/net/phy/phylink.c
++++ b/drivers/net/phy/phylink.c
+@@ -907,7 +907,8 @@ void phylink_destroy(struct phylink *pl)
+ }
+ EXPORT_SYMBOL_GPL(phylink_destroy);
+ 
+-static void phylink_phy_change(struct phy_device *phydev, bool up)
++static void phylink_phy_change(struct phy_device *phydev, bool up,
++			       bool do_carrier)
+ {
+ 	struct phylink *pl = phydev->phylink;
+ 	bool tx_pause, rx_pause;
+--- a/include/linux/phy.h
++++ b/include/linux/phy.h
+@@ -636,7 +636,7 @@ struct phy_device {
+ 	u8 mdix;
+ 	u8 mdix_ctrl;
+ 
+-	void (*phy_link_change)(struct phy_device *phydev, bool up);
++	void (*phy_link_change)(struct phy_device *, bool up, bool do_carrier);
+ 	void (*adjust_link)(struct net_device *dev);
+ 
+ #if IS_ENABLED(CONFIG_MACSEC)