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, 149 insertions, 0 deletions

diff --git a/target/linux/ramips/patches-5.10/710-at803x.patch b/target/linux/ramips/patches-5.10/710-at803x.patch
new file mode 100644
index 0000000000..2b0407d525
--- /dev/null
+++ b/target/linux/ramips/patches-5.10/710-at803x.patch
@@ -0,0 +1,149 @@
+From 924453aa9d2324e5611f8e2b71df746d8f0c79f1 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Ren=C3=A9=20van=20Dorst?= <opensource@vdorst.com>
+Date: Fri, 13 Nov 2020 16:11:32 +0100
+Subject: [PATCH] net: phy: at803x: add support for SFP module in
+ RGMII-to-x-base mode
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Signed-off-by: René van Dorst <opensource@vdorst.com>
+---
+ drivers/net/phy/at803x.c | 91 ++++++++++++++++++++++++++++++++++++++++
+ 1 file changed, 91 insertions(+)
+
+--- a/drivers/net/phy/at803x.c
++++ b/drivers/net/phy/at803x.c
+@@ -20,6 +20,8 @@
+ #include <linux/regulator/driver.h>
+ #include <linux/regulator/consumer.h>
+ #include <dt-bindings/net/qca-ar803x.h>
++#include <linux/sfp.h>
++#include <linux/phylink.h>
+ 
+ #define AT803X_SPECIFIC_FUNCTION_CONTROL	0x10
+ #define AT803X_SFC_ASSERT_CRS			BIT(11)
+@@ -83,9 +85,18 @@
+ 
+ #define AT803X_MODE_CFG_MASK			0x0F
+ #define AT803X_MODE_CFG_SGMII			0x01
++#define AT803X_MODE_CFG_BX1000_RGMII_50		0x02
++#define AT803X_MODE_CFG_BX1000_RGMII_75		0x03
++#define AT803X_MODE_FIBER			0x01
++#define AT803X_MODE_COPPER			0x00
+ 
+ #define AT803X_PSSR			0x11	/*PHY-Specific Status Register*/
+ #define AT803X_PSSR_MR_AN_COMPLETE	0x0200
++#define	 PSSR_LINK			BIT(10)
++#define	 PSSR_SYNC_STATUS		BIT(8)
++#define	 PSSR_DUPLEX			BIT(13)
++#define	 PSSR_SPEED_1000		BIT(15)
++#define	 PSSR_SPEED_100			BIT(14)
+ 
+ #define AT803X_DEBUG_REG_0			0x00
+ #define AT803X_DEBUG_RX_CLK_DLY_EN		BIT(15)
+@@ -505,10 +516,72 @@ static int at803x_parse_dt(struct phy_de
+ 	return 0;
+ }
+ 
++static int at803x_mode(struct phy_device *phydev)
++{
++	int mode;
++
++	mode = phy_read(phydev, AT803X_REG_CHIP_CONFIG) & AT803X_MODE_CFG_MASK;
++
++	if (mode == AT803X_MODE_CFG_BX1000_RGMII_50 ||
++	    mode == AT803X_MODE_CFG_BX1000_RGMII_75)
++		return AT803X_MODE_FIBER;
++	return AT803X_MODE_COPPER;
++}
++
++static int at803x_sfp_insert(void *upstream, const struct sfp_eeprom_id *id)
++{
++	__ETHTOOL_DECLARE_LINK_MODE_MASK(at803x_support) = { 0, };
++	__ETHTOOL_DECLARE_LINK_MODE_MASK(support) = { 0, };
++	struct phy_device *phydev = upstream;
++	phy_interface_t iface;
++
++	phylink_set(at803x_support, 1000baseX_Full);
++	/* AT803x only support 1000baseX but SGMII works fine when module runs
++	 * at 1Gbit.
++	 */
++	phylink_set(at803x_support, 1000baseT_Full);
++
++	sfp_parse_support(phydev->sfp_bus, id, support);
++
++	// Limit to interfaces that both sides support
++	linkmode_and(support, support, at803x_support);
++
++	if (linkmode_empty(support))
++		goto unsupported_mode;
++
++	iface = sfp_select_interface(phydev->sfp_bus, support);
++
++	if (iface != PHY_INTERFACE_MODE_SGMII &&
++	    iface != PHY_INTERFACE_MODE_1000BASEX)
++		goto unsupported_mode;
++
++	dev_info(&phydev->mdio.dev, "SFP interface %s", phy_modes(iface));
++
++	return 0;
++
++unsupported_mode:
++	dev_info(&phydev->mdio.dev, "incompatible SFP module inserted;"
++		 "Only SGMII at 1Gbit/1000BASEX are supported!\n");
++	return -EINVAL;
++}
++
++static const struct sfp_upstream_ops at803x_sfp_ops = {
++	.attach = phy_sfp_attach,
++	.detach = phy_sfp_detach,
++	.module_insert = at803x_sfp_insert,
++};
++
+ static int at803x_probe(struct phy_device *phydev)
+ {
+ 	struct device *dev = &phydev->mdio.dev;
+ 	struct at803x_priv *priv;
++	int ret;
++
++	if (at803x_mode(phydev) == AT803X_MODE_FIBER) {
++		ret = phy_sfp_probe(phydev, &at803x_sfp_ops);
++		if (ret < 0)
++			return ret;
++	}
+ 
+ 	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ 	if (!priv)
+@@ -709,6 +782,10 @@ static int at803x_read_status(struct phy
+ {
+ 	int ss, err, old_link = phydev->link;
+ 
++	/* Handle (Fiber) SGMII to RGMII mode */
++	if (at803x_mode(phydev) == AT803X_MODE_FIBER)
++		return genphy_c37_read_status(phydev);
++
+ 	/* Update the link, but return if there was an error */
+ 	err = genphy_update_link(phydev);
+ 	if (err)
+@@ -809,6 +886,12 @@ static int at803x_config_aneg(struct phy
+ {
+ 	int ret;
+ 
++	/* Handle (Fiber) SerDes to RGMII mode */
++	if (at803x_mode(phydev) == AT803X_MODE_FIBER) {
++		pr_warn("%s: fiber\n", __func__);
++		return genphy_c37_config_aneg(phydev);
++	}
++
+ 	ret = at803x_config_mdix(phydev, phydev->mdix_ctrl);
+ 	if (ret < 0)
+ 		return ret;
+@@ -1120,6 +1203,7 @@ static struct phy_driver at803x_driver[]
+ 	.suspend		= at803x_suspend,
+ 	.resume			= at803x_resume,
+ 	/* PHY_GBIT_FEATURES */
++	.config_aneg		= at803x_config_aneg,
+ 	.read_status		= at803x_read_status,
+ 	.aneg_done		= at803x_aneg_done,
+ 	.ack_interrupt		= &at803x_ack_interrupt,