generic: 5.15: qca8k: backport code split patch

Backport upstream code split patch for qca8k needed for ipq40xx target
to correctly implement a DSA driver.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>

1 files changed, 44 insertions, 0 deletions

diff --git a/target/linux/generic/backport-5.15/769-v5.19-06-net-dsa-qca8k-unify-bus-id-naming-with-legacy-and-OF.patch b/target/linux/generic/backport-5.15/769-v5.19-06-net-dsa-qca8k-unify-bus-id-naming-with-legacy-and-OF.patch
new file mode 100644
index 0000000000..094686f11b
--- /dev/null
+++ b/target/linux/generic/backport-5.15/769-v5.19-06-net-dsa-qca8k-unify-bus-id-naming-with-legacy-and-OF.patch
@@ -0,0 +1,44 @@
+From 8d1af50842bf2774f4edc57054206e909117469b Mon Sep 17 00:00:00 2001
+From: Ansuel Smith <ansuelsmth@gmail.com>
+Date: Sat, 16 Apr 2022 01:30:17 +0200
+Subject: [PATCH 6/6] net: dsa: qca8k: unify bus id naming with legacy and OF
+ mdio bus
+
+Add support for multiple switch with OF mdio bus declaration.
+Unify the bus id naming and use the same logic for both legacy and OF
+mdio bus.
+
+Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+---
+ drivers/net/dsa/qca8k.c | 5 ++---
+ 1 file changed, 2 insertions(+), 3 deletions(-)
+
+--- a/drivers/net/dsa/qca8k.c
++++ b/drivers/net/dsa/qca8k.c
+@@ -1323,6 +1323,8 @@ qca8k_mdio_register(struct qca8k_priv *p
+ 		return -ENOMEM;
+ 
+ 	bus->priv = (void *)priv;
++	snprintf(bus->id, MII_BUS_ID_SIZE, "qca8k-%d.%d",
++		 ds->dst->index, ds->index);
+ 	bus->parent = ds->dev;
+ 	bus->phy_mask = ~ds->phys_mii_mask;
+ 	ds->slave_mii_bus = bus;
+@@ -1330,7 +1332,6 @@ qca8k_mdio_register(struct qca8k_priv *p
+ 	/* Check if the devicetree declare the port:phy mapping */
+ 	mdio = of_get_child_by_name(priv->dev->of_node, "mdio");
+ 	if (of_device_is_available(mdio)) {
+-		snprintf(bus->id, MII_BUS_ID_SIZE, "qca8k-%d", ds->index);
+ 		bus->name = "qca8k slave mii";
+ 		bus->read = qca8k_internal_mdio_read;
+ 		bus->write = qca8k_internal_mdio_write;
+@@ -1340,8 +1341,6 @@ qca8k_mdio_register(struct qca8k_priv *p
+ 	/* If a mapping can't be found the legacy mapping is used,
+ 	 * using the qca8k_port_to_phy function
+ 	 */
+-	snprintf(bus->id, MII_BUS_ID_SIZE, "qca8k-%d.%d",
+-		 ds->dst->index, ds->index);
+ 	bus->name = "qca8k-legacy slave mii";
+ 	bus->read = qca8k_legacy_mdio_read;
+ 	bus->write = qca8k_legacy_mdio_write;