kirkwood: 6.1: backport Marvell 88E6171 init fix patch

After commit de5c9bf40c45 ("net: phylink: require supported_interfaces to
be filled") Marvell 88e6171 switches fail to be probed:

[    1.263852] mv88e6085 f1072004.mdio-bus-mii:10: switch 0x1710 detected: Marvell 88E6171, revision 2
[    2.177654] mv88e6085 f1072004.mdio-bus-mii:10: OF node /ocp@f1000000/mdio-bus@72004/switch@10/ports/port@5 of CPU port 5 lacks the required "phy-mode" property
[    2.194230] mv88e6085 f1072004.mdio-bus-mii:10: phylink: error: empty supported_interfaces
[    2.202554] error creating PHYLINK: -22
[    2.214109] mv88e6085: probe of f1072004.mdio-bus-mii:10 failed with error -22

Upstream handled it. Lets backport patch.

Signed-off-by: Pawel Dembicki <[email protected]>

target/linux/kirkwood/patches-6.1/005-6.7-net-dsa-mv88e6xxx-fix-marvell-6350-switch-probing.patch

@@ -0,0 +1,89 @@
+From b3f1a164c7f742503dc7159011f7ad6b092b660e Mon Sep 17 00:00:00 2001
+From: Greg Ungerer <[email protected]>
+Date: Fri, 24 Nov 2023 14:15:28 +1000
+Subject: [PATCH] net: dsa: mv88e6xxx: fix marvell 6350 switch probing
+
+As of commit de5c9bf40c45 ("net: phylink: require supported_interfaces to
+be filled") Marvell 88e6350 switches fail to be probed:
+
+    ...
+    mv88e6085 d0072004.mdio-mii:11: switch 0x3710 detected: Marvell 88E6350, revision 2
+    mv88e6085 d0072004.mdio-mii:11: phylink: error: empty supported_interfaces
+    error creating PHYLINK: -22
+    mv88e6085: probe of d0072004.mdio-mii:11 failed with error -22
+    ...
+
+The problem stems from the use of mv88e6185_phylink_get_caps() to get
+the device capabilities. Create a new dedicated phylink_get_caps for the
+6351 family (which the 6350 is one of) to properly support their set of
+capabilities.
+
+According to chip.h the 6351 switch family includes the 6171, 6175, 6350
+and 6351 switches, so update each of these to use the correct
+phylink_get_caps.
+
+Fixes: de5c9bf40c45 ("net: phylink: require supported_interfaces to be filled")
+Signed-off-by: Greg Ungerer <[email protected]>
+Reviewed-by: Andrew Lunn <[email protected]>
+Signed-off-by: David S. Miller <[email protected]>
+---
+ drivers/net/dsa/mv88e6xxx/chip.c | 20 ++++++++++++++++----
+ 1 file changed, 16 insertions(+), 4 deletions(-)
+
+--- a/drivers/net/dsa/mv88e6xxx/chip.c
++++ b/drivers/net/dsa/mv88e6xxx/chip.c
+@@ -652,6 +652,18 @@ static void mv88e6250_phylink_get_caps(s
+ 	config->mac_capabilities = MAC_SYM_PAUSE | MAC_10 | MAC_100;
+ }
+ 
++static void mv88e6351_phylink_get_caps(struct mv88e6xxx_chip *chip, int port,
++				       struct phylink_config *config)
++{
++	unsigned long *supported = config->supported_interfaces;
++
++	/* Translate the default cmode */
++	mv88e6xxx_translate_cmode(chip->ports[port].cmode, supported);
++
++	config->mac_capabilities = MAC_SYM_PAUSE | MAC_10 | MAC_100 |
++				   MAC_1000FD;
++}
++
+ static int mv88e6352_get_port4_serdes_cmode(struct mv88e6xxx_chip *chip)
+ {
+ 	u16 reg, val;
+@@ -4498,7 +4510,7 @@ static const struct mv88e6xxx_ops mv88e6
+ 	.vtu_loadpurge = mv88e6352_g1_vtu_loadpurge,
+ 	.stu_getnext = mv88e6352_g1_stu_getnext,
+ 	.stu_loadpurge = mv88e6352_g1_stu_loadpurge,
+-	.phylink_get_caps = mv88e6185_phylink_get_caps,
++	.phylink_get_caps = mv88e6351_phylink_get_caps,
+ };
+ 
+ static const struct mv88e6xxx_ops mv88e6172_ops = {
+@@ -4599,7 +4611,7 @@ static const struct mv88e6xxx_ops mv88e6
+ 	.vtu_loadpurge = mv88e6352_g1_vtu_loadpurge,
+ 	.stu_getnext = mv88e6352_g1_stu_getnext,
+ 	.stu_loadpurge = mv88e6352_g1_stu_loadpurge,
+-	.phylink_get_caps = mv88e6185_phylink_get_caps,
++	.phylink_get_caps = mv88e6351_phylink_get_caps,
+ };
+ 
+ static const struct mv88e6xxx_ops mv88e6176_ops = {
+@@ -5256,7 +5268,7 @@ static const struct mv88e6xxx_ops mv88e6
+ 	.vtu_loadpurge = mv88e6352_g1_vtu_loadpurge,
+ 	.stu_getnext = mv88e6352_g1_stu_getnext,
+ 	.stu_loadpurge = mv88e6352_g1_stu_loadpurge,
+-	.phylink_get_caps = mv88e6185_phylink_get_caps,
++	.phylink_get_caps = mv88e6351_phylink_get_caps,
+ };
+ 
+ static const struct mv88e6xxx_ops mv88e6351_ops = {
+@@ -5302,7 +5314,7 @@ static const struct mv88e6xxx_ops mv88e6
+ 	.stu_loadpurge = mv88e6352_g1_stu_loadpurge,
+ 	.avb_ops = &mv88e6352_avb_ops,
+ 	.ptp_ops = &mv88e6352_ptp_ops,
+-	.phylink_get_caps = mv88e6185_phylink_get_caps,
++	.phylink_get_caps = mv88e6351_phylink_get_caps,
+ };
+ 
+ static const struct mv88e6xxx_ops mv88e6352_ops = {