linux: update b53 upstream driver

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>

18 files changed, 936 insertions, 10 deletions

diff --git a/target/linux/bmips/patches-5.10/510-net-dsa-b53-add-support-for-BCM63xx-RGMIIs.patch b/target/linux/bmips/patches-5.10/510-net-dsa-b53-add-support-for-BCM63xx-RGMIIs.patch
index 41655231fa..c636e3a907 100644
--- a/target/linux/bmips/patches-5.10/510-net-dsa-b53-add-support-for-BCM63xx-RGMIIs.patch
+++ b/target/linux/bmips/patches-5.10/510-net-dsa-b53-add-support-for-BCM63xx-RGMIIs.patch
@@ -13,7 +13,7 @@ Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
 
 --- a/drivers/net/dsa/b53/b53_common.c
 +++ b/drivers/net/dsa/b53/b53_common.c
-@@ -1148,6 +1148,36 @@ static void b53_force_port_config(struct
+@@ -1174,6 +1174,36 @@ static void b53_force_port_config(struct
  	b53_write8(dev, B53_CTRL_PAGE, off, reg);
  }
  
@@ -50,7 +50,7 @@ Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
  static void b53_adjust_link(struct dsa_switch *ds, int port,
  			    struct phy_device *phydev)
  {
-@@ -1174,6 +1204,9 @@ static void b53_adjust_link(struct dsa_s
+@@ -1200,6 +1230,9 @@ static void b53_adjust_link(struct dsa_s
  			      tx_pause, rx_pause);
  	b53_force_link(dev, port, phydev->link);
  
@@ -58,9 +58,9 @@ Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
 +		b53_adjust_63xx_rgmii(ds, port, phydev->interface);
 +
  	if (is531x5(dev) && phy_interface_is_rgmii(phydev)) {
- 		if (port == 8)
+ 		if (port == dev->imp_port)
  			off = B53_RGMII_CTRL_IMP;
-@@ -1366,6 +1399,9 @@ void b53_phylink_mac_link_up(struct dsa_
+@@ -1386,6 +1419,9 @@ void b53_phylink_mac_link_up(struct dsa_
  {
  	struct b53_device *dev = ds->priv;
  
diff --git a/target/linux/generic/backport-5.10/790-v5.13-0001-net-dsa-b53-Add-debug-prints-in-b53_vlan_enable.patch b/target/linux/generic/backport-5.10/790-v5.13-0001-net-dsa-b53-Add-debug-prints-in-b53_vlan_enable.patch
new file mode 100644
index 0000000000..91cf55b18a
--- /dev/null
+++ b/target/linux/generic/backport-5.10/790-v5.13-0001-net-dsa-b53-Add-debug-prints-in-b53_vlan_enable.patch
@@ -0,0 +1,65 @@
+From ee47ed08d75e8f16b3cf882061ee19c2ea19dd6c Mon Sep 17 00:00:00 2001
+From: Florian Fainelli <f.fainelli@gmail.com>
+Date: Wed, 10 Mar 2021 10:52:26 -0800
+Subject: [PATCH] net: dsa: b53: Add debug prints in b53_vlan_enable()
+
+Having dynamic debug prints in b53_vlan_enable() has been helpful to
+uncover a recent but update the function to indicate the port being
+configured (or -1 for initial setup) and include the global VLAN enabled
+and VLAN filtering enable status.
+
+Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
+Reviewed-by: Andrew Lunn <andrew@lunn.ch>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+---
+ drivers/net/dsa/b53/b53_common.c | 11 +++++++----
+ 1 file changed, 7 insertions(+), 4 deletions(-)
+
+--- a/drivers/net/dsa/b53/b53_common.c
++++ b/drivers/net/dsa/b53/b53_common.c
+@@ -349,7 +349,7 @@ static void b53_set_forwarding(struct b5
+ 	b53_write8(dev, B53_CTRL_PAGE, B53_IP_MULTICAST_CTRL, mgmt);
+ }
+ 
+-static void b53_enable_vlan(struct b53_device *dev, bool enable,
++static void b53_enable_vlan(struct b53_device *dev, int port, bool enable,
+ 			    bool enable_filtering)
+ {
+ 	u8 mgmt, vc0, vc1, vc4 = 0, vc5;
+@@ -431,6 +431,9 @@ static void b53_enable_vlan(struct b53_d
+ 	b53_write8(dev, B53_CTRL_PAGE, B53_SWITCH_MODE, mgmt);
+ 
+ 	dev->vlan_enabled = enable;
++
++	dev_dbg(dev->dev, "Port %d VLAN enabled: %d, filtering: %d\n",
++		port, enable, enable_filtering);
+ }
+ 
+ static int b53_set_jumbo(struct b53_device *dev, bool enable, bool allow_10_100)
+@@ -708,7 +711,7 @@ int b53_configure_vlan(struct dsa_switch
+ 		b53_do_vlan_op(dev, VTA_CMD_CLEAR);
+ 	}
+ 
+-	b53_enable_vlan(dev, dev->vlan_enabled, ds->vlan_filtering);
++	b53_enable_vlan(dev, -1, dev->vlan_enabled, ds->vlan_filtering);
+ 
+ 	b53_for_each_port(dev, i)
+ 		b53_write16(dev, B53_VLAN_PAGE,
+@@ -1390,7 +1393,7 @@ int b53_vlan_filtering(struct dsa_switch
+ 	if (switchdev_trans_ph_prepare(trans))
+ 		return 0;
+ 
+-	b53_enable_vlan(dev, dev->vlan_enabled, vlan_filtering);
++	b53_enable_vlan(dev, port, dev->vlan_enabled, vlan_filtering);
+ 
+ 	return 0;
+ }
+@@ -1415,7 +1418,7 @@ int b53_vlan_prepare(struct dsa_switch *
+ 	if (vlan->vid_end >= dev->num_vlans)
+ 		return -ERANGE;
+ 
+-	b53_enable_vlan(dev, true, ds->vlan_filtering);
++	b53_enable_vlan(dev, port, true, ds->vlan_filtering);
+ 
+ 	return 0;
+ }
diff --git a/target/linux/bmips/patches-5.10/045-v5.13-net-dsa-b53-spi-allow-device-tree-probing.patch b/target/linux/generic/backport-5.10/790-v5.13-0002-net-dsa-b53-spi-allow-device-tree-probing.patch
index 56579b2d36..56579b2d36 100644
--- a/target/linux/bmips/patches-5.10/045-v5.13-net-dsa-b53-spi-allow-device-tree-probing.patch
+++ b/target/linux/generic/backport-5.10/790-v5.13-0002-net-dsa-b53-spi-allow-device-tree-probing.patch
diff --git a/target/linux/bmips/patches-5.10/048-v5.13-net-dsa-b53-relax-is63xx-condition.patch b/target/linux/generic/backport-5.10/790-v5.13-0003-net-dsa-b53-relax-is63xx-condition.patch
index ef5522ad33..ef5522ad33 100644
--- a/target/linux/bmips/patches-5.10/048-v5.13-net-dsa-b53-relax-is63xx-condition.patch
+++ b/target/linux/generic/backport-5.10/790-v5.13-0003-net-dsa-b53-relax-is63xx-condition.patch
diff --git a/target/linux/bmips/patches-5.10/049-v5.13-net-dsa-tag_brcm-add-support-for-legacy-tags.patch b/target/linux/generic/backport-5.10/790-v5.13-0004-net-dsa-tag_brcm-add-support-for-legacy-tags.patch
index c689bc84d1..3b7d8f37cd 100644
--- a/target/linux/bmips/patches-5.10/049-v5.13-net-dsa-tag_brcm-add-support-for-legacy-tags.patch
+++ b/target/linux/generic/backport-5.10/790-v5.13-0004-net-dsa-tag_brcm-add-support-for-legacy-tags.patch
@@ -1,7 +1,7 @@
 From 964dbf186eaa84d409c359ddf09c827a3fbe8228 Mon Sep 17 00:00:00 2001
 From: =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= <noltari@gmail.com>
 Date: Wed, 17 Mar 2021 11:29:26 +0100
-Subject: [PATCH 1/2] net: dsa: tag_brcm: add support for legacy tags
+Subject: [PATCH] net: dsa: tag_brcm: add support for legacy tags
 MIME-Version: 1.0
 Content-Type: text/plain; charset=UTF-8
 Content-Transfer-Encoding: 8bit
diff --git a/target/linux/bmips/patches-5.10/050-v5.13-net-dsa-b53-support-legacy-tags.patch b/target/linux/generic/backport-5.10/790-v5.13-0005-net-dsa-b53-support-legacy-tags.patch
index 18cd09ff0e..838e78a057 100644
--- a/target/linux/bmips/patches-5.10/050-v5.13-net-dsa-b53-support-legacy-tags.patch
+++ b/target/linux/generic/backport-5.10/790-v5.13-0005-net-dsa-b53-support-legacy-tags.patch
@@ -1,7 +1,7 @@
 From 46c5176c586c81306bf9e7024c13b95da775490f Mon Sep 17 00:00:00 2001
 From: =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= <noltari@gmail.com>
 Date: Wed, 17 Mar 2021 11:29:27 +0100
-Subject: [PATCH 2/2] net: dsa: b53: support legacy tags
+Subject: [PATCH] net: dsa: b53: support legacy tags
 MIME-Version: 1.0
 Content-Type: text/plain; charset=UTF-8
 Content-Transfer-Encoding: 8bit
@@ -28,7 +28,7 @@ Signed-off-by: David S. Miller <davem@davemloft.net>
  	  This driver adds support for Broadcom managed switch chips. It supports
 --- a/drivers/net/dsa/b53/b53_common.c
 +++ b/drivers/net/dsa/b53/b53_common.c
-@@ -2021,15 +2021,17 @@ enum dsa_tag_protocol b53_get_tag_protoc
+@@ -2024,15 +2024,17 @@ enum dsa_tag_protocol b53_get_tag_protoc
  {
  	struct b53_device *dev = ds->priv;
  
diff --git a/target/linux/bmips/patches-5.10/051-v5.13-net-dsa-b53-mmap-Add-device-tree-support.patch b/target/linux/generic/backport-5.10/790-v5.13-0006-net-dsa-b53-mmap-Add-device-tree-support.patch
index c1014b20bc..c1014b20bc 100644
--- a/target/linux/bmips/patches-5.10/051-v5.13-net-dsa-b53-mmap-Add-device-tree-support.patch
+++ b/target/linux/generic/backport-5.10/790-v5.13-0006-net-dsa-b53-mmap-Add-device-tree-support.patch
diff --git a/target/linux/generic/backport-5.10/790-v5.13-0007-net-dsa-b53-spi-add-missing-MODULE_DEVICE_TABLE.patch b/target/linux/generic/backport-5.10/790-v5.13-0007-net-dsa-b53-spi-add-missing-MODULE_DEVICE_TABLE.patch
new file mode 100644
index 0000000000..ea36755732
--- /dev/null
+++ b/target/linux/generic/backport-5.10/790-v5.13-0007-net-dsa-b53-spi-add-missing-MODULE_DEVICE_TABLE.patch
@@ -0,0 +1,27 @@
+From 866f1577ba69bde2b9f36c300f603596c7d84a62 Mon Sep 17 00:00:00 2001
+From: Qinglang Miao <miaoqinglang@huawei.com>
+Date: Thu, 25 Mar 2021 17:19:54 +0800
+Subject: [PATCH] net: dsa: b53: spi: add missing MODULE_DEVICE_TABLE
+
+This patch adds missing MODULE_DEVICE_TABLE definition which generates
+correct modalias for automatic loading of this driver when it is built
+as an external module.
+
+Reported-by: Hulk Robot <hulkci@huawei.com>
+Signed-off-by: Qinglang Miao <miaoqinglang@huawei.com>
+Acked-by: Florian Fainelli <f.fainelli@gmail.com>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+---
+ drivers/net/dsa/b53/b53_spi.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+--- a/drivers/net/dsa/b53/b53_spi.c
++++ b/drivers/net/dsa/b53/b53_spi.c
+@@ -335,6 +335,7 @@ static const struct of_device_id b53_spi
+ 	{ .compatible = "brcm,bcm53128" },
+ 	{ /* sentinel */ }
+ };
++MODULE_DEVICE_TABLE(of, b53_spi_of_match);
+ 
+ static struct spi_driver b53_spi_driver = {
+ 	.driver = {
diff --git a/target/linux/generic/backport-5.10/791-v5.14-0001-net-dsa-b53-Do-not-force-CPU-to-be-always-tagged.patch b/target/linux/generic/backport-5.10/791-v5.14-0001-net-dsa-b53-Do-not-force-CPU-to-be-always-tagged.patch
new file mode 100644
index 0000000000..420e3ae31b
--- /dev/null
+++ b/target/linux/generic/backport-5.10/791-v5.14-0001-net-dsa-b53-Do-not-force-CPU-to-be-always-tagged.patch
@@ -0,0 +1,86 @@
+From 2c32a3d3c233b855943677609fe388f82b1f0975 Mon Sep 17 00:00:00 2001
+From: Florian Fainelli <f.fainelli@gmail.com>
+Date: Tue, 8 Jun 2021 14:22:04 -0700
+Subject: [PATCH] net: dsa: b53: Do not force CPU to be always tagged
+
+Commit ca8931948344 ("net: dsa: b53: Keep CPU port as tagged in all
+VLANs") forced the CPU port to be always tagged in any VLAN membership.
+This was necessary back then because we did not support Broadcom tags
+for all configurations so the only way to differentiate tagged and
+untagged traffic while DSA_TAG_PROTO_NONE was used was to force the CPU
+port into being always tagged.
+
+With most configurations enabling Broadcom tags, especially after
+8fab459e69ab ("net: dsa: b53: Enable Broadcom tags for 531x5/539x
+families") we do not need to apply this unconditional force tagging of
+the CPU port in all VLANs.
+
+A helper function is introduced to faciliate the encapsulation of the
+specific condition requiring the CPU port to be tagged in all VLANs and
+the dsa_switch_ops::untag_bridge_pvid boolean is moved to when
+dsa_switch_ops::setup is called when we have already determined the
+tagging protocol we will be using.
+
+Reported-by: Matthew Hagan <mnhagan88@gmail.com>
+Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
+Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
+Tested-by: Matthew Hagan <mnhagan88@gmail.com>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+---
+ drivers/net/dsa/b53/b53_common.c | 17 ++++++++++++++---
+ 1 file changed, 14 insertions(+), 3 deletions(-)
+
+--- a/drivers/net/dsa/b53/b53_common.c
++++ b/drivers/net/dsa/b53/b53_common.c
+@@ -1049,6 +1049,11 @@ static int b53_setup(struct dsa_switch *
+ 	unsigned int port;
+ 	int ret;
+ 
++	/* Request bridge PVID untagged when DSA_TAG_PROTO_NONE is set
++	 * which forces the CPU port to be tagged in all VLANs.
++	 */
++	ds->untag_bridge_pvid = dev->tag_protocol == DSA_TAG_PROTO_NONE;
++
+ 	ret = b53_reset_switch(dev);
+ 	if (ret) {
+ 		dev_err(ds->dev, "failed to reset switch\n");
+@@ -1423,6 +1428,13 @@ int b53_vlan_prepare(struct dsa_switch *
+ 	return 0;
+ }
+ EXPORT_SYMBOL(b53_vlan_prepare);
++ 
++static bool b53_vlan_port_needs_forced_tagged(struct dsa_switch *ds, int port)
++{
++	struct b53_device *dev = ds->priv;
++
++	return dev->tag_protocol == DSA_TAG_PROTO_NONE && dsa_is_cpu_port(ds, port);
++}
+ 
+ void b53_vlan_add(struct dsa_switch *ds, int port,
+ 		  const struct switchdev_obj_port_vlan *vlan)
+@@ -1442,7 +1454,7 @@ void b53_vlan_add(struct dsa_switch *ds,
+ 			untagged = true;
+ 
+ 		vl->members |= BIT(port);
+-		if (untagged && !dsa_is_cpu_port(ds, port))
++		if (untagged && !b53_vlan_port_needs_forced_tagged(ds, port))
+ 			vl->untag |= BIT(port);
+ 		else
+ 			vl->untag &= ~BIT(port);
+@@ -1480,7 +1492,7 @@ int b53_vlan_del(struct dsa_switch *ds,
+ 		if (pvid == vid)
+ 			pvid = b53_default_pvid(dev);
+ 
+-		if (untagged && !dsa_is_cpu_port(ds, port))
++		if (untagged && !b53_vlan_port_needs_forced_tagged(ds, port))
+ 			vl->untag &= ~(BIT(port));
+ 
+ 		b53_set_vlan_entry(dev, vid, vl);
+@@ -2623,7 +2635,6 @@ struct b53_device *b53_switch_alloc(stru
+ 	dev->ops = ops;
+ 	ds->ops = &b53_switch_ops;
+ 	ds->configure_vlan_while_not_filtering = true;
+-	ds->untag_bridge_pvid = true;
+ 	dev->vlan_enabled = ds->configure_vlan_while_not_filtering;
+ 	/* Let DSA handle the case were multiple bridges span the same switch
+ 	 * device and different VLAN awareness settings are requested, which
diff --git a/target/linux/generic/backport-5.10/791-v5.14-0002-net-dsa-b53-remove-redundant-null-check-on-dev.patch b/target/linux/generic/backport-5.10/791-v5.14-0002-net-dsa-b53-remove-redundant-null-check-on-dev.patch
new file mode 100644
index 0000000000..ee3a71ffa5
--- /dev/null
+++ b/target/linux/generic/backport-5.10/791-v5.14-0002-net-dsa-b53-remove-redundant-null-check-on-dev.patch
@@ -0,0 +1,30 @@
+From 11b57faf951cd3a570e3d9e463fc7c41023bc8c6 Mon Sep 17 00:00:00 2001
+From: Colin Ian King <colin.king@canonical.com>
+Date: Tue, 15 Jun 2021 10:05:16 +0100
+Subject: [PATCH] net: dsa: b53: remove redundant null check on dev
+
+The pointer dev can never be null, the null check is redundant
+and can be removed. Cleans up a static analysis warning that
+pointer priv is dereferencing dev before dev is being null
+checked.
+
+Addresses-Coverity: ("Dereference before null check")
+Signed-off-by: Colin Ian King <colin.king@canonical.com>
+Acked-by: Florian Fainelli <f.fainelli@gmail.com>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+---
+ drivers/net/dsa/b53/b53_srab.c | 3 +--
+ 1 file changed, 1 insertion(+), 2 deletions(-)
+
+--- a/drivers/net/dsa/b53/b53_srab.c
++++ b/drivers/net/dsa/b53/b53_srab.c
+@@ -632,8 +632,7 @@ static int b53_srab_remove(struct platfo
+ 	struct b53_srab_priv *priv = dev->priv;
+ 
+ 	b53_srab_intr_set(priv, false);
+-	if (dev)
+-		b53_switch_remove(dev);
++	b53_switch_remove(dev);
+ 
+ 	return 0;
+ }
diff --git a/target/linux/generic/backport-5.10/791-v5.14-0003-net-dsa-b53-Create-default-VLAN-entry-explicitly.patch b/target/linux/generic/backport-5.10/791-v5.14-0003-net-dsa-b53-Create-default-VLAN-entry-explicitly.patch
new file mode 100644
index 0000000000..df891d68ab
--- /dev/null
+++ b/target/linux/generic/backport-5.10/791-v5.14-0003-net-dsa-b53-Create-default-VLAN-entry-explicitly.patch
@@ -0,0 +1,71 @@
+From 64a81b24487f0d2fba0f033029eec2abc7d82cee Mon Sep 17 00:00:00 2001
+From: Florian Fainelli <f.fainelli@gmail.com>
+Date: Mon, 21 Jun 2021 15:10:55 -0700
+Subject: [PATCH] net: dsa: b53: Create default VLAN entry explicitly
+
+In case CONFIG_VLAN_8021Q is not set, there will be no call down to the
+b53 driver to ensure that the default PVID VLAN entry will be configured
+with the appropriate untagged attribute towards the CPU port. We were
+implicitly relying on dsa_slave_vlan_rx_add_vid() to do that for us,
+instead make it explicit.
+
+Reported-by: Vladimir Oltean <olteanv@gmail.com>
+Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
+Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+---
+ drivers/net/dsa/b53/b53_common.c | 27 +++++++++++++++++++--------
+ 1 file changed, 19 insertions(+), 8 deletions(-)
+
+--- a/drivers/net/dsa/b53/b53_common.c
++++ b/drivers/net/dsa/b53/b53_common.c
+@@ -693,6 +693,13 @@ static u16 b53_default_pvid(struct b53_d
+ 		return 0;
+ }
+ 
++static bool b53_vlan_port_needs_forced_tagged(struct dsa_switch *ds, int port)
++{
++	struct b53_device *dev = ds->priv;
++
++	return dev->tag_protocol == DSA_TAG_PROTO_NONE && dsa_is_cpu_port(ds, port);
++}
++
+ int b53_configure_vlan(struct dsa_switch *ds)
+ {
+ 	struct b53_device *dev = ds->priv;
+@@ -713,9 +720,20 @@ int b53_configure_vlan(struct dsa_switch
+ 
+ 	b53_enable_vlan(dev, -1, dev->vlan_enabled, ds->vlan_filtering);
+ 
+-	b53_for_each_port(dev, i)
++	/* Create an untagged VLAN entry for the default PVID in case
++	 * CONFIG_VLAN_8021Q is disabled and there are no calls to
++	 * dsa_slave_vlan_rx_add_vid() to create the default VLAN
++	 * entry. Do this only when the tagging protocol is not
++	 * DSA_TAG_PROTO_NONE
++	 */
++	b53_for_each_port(dev, i) {
++		v = &dev->vlans[def_vid];
++		v->members |= BIT(i);
++		if (!b53_vlan_port_needs_forced_tagged(ds, i))
++			v->untag = v->members;
+ 		b53_write16(dev, B53_VLAN_PAGE,
+ 			    B53_VLAN_PORT_DEF_TAG(i), def_vid);
++	}
+ 
+ 	/* Upon initial call we have not set-up any VLANs, but upon
+ 	 * system resume, we need to restore all VLAN entries.
+@@ -1429,13 +1447,6 @@ int b53_vlan_prepare(struct dsa_switch *
+ }
+ EXPORT_SYMBOL(b53_vlan_prepare);
+  
+-static bool b53_vlan_port_needs_forced_tagged(struct dsa_switch *ds, int port)
+-{
+-	struct b53_device *dev = ds->priv;
+-
+-	return dev->tag_protocol == DSA_TAG_PROTO_NONE && dsa_is_cpu_port(ds, port);
+-}
+-
+ void b53_vlan_add(struct dsa_switch *ds, int port,
+ 		  const struct switchdev_obj_port_vlan *vlan)
+ {
diff --git a/target/linux/generic/backport-5.10/790-v5.15-0001-net-dsa-b53-Fix-calculating-number-of-switch-ports.patch b/target/linux/generic/backport-5.10/792-v5.15-0001-net-dsa-b53-Fix-calculating-number-of-switch-ports.patch
index f1bef258af..4a7cbd9a4f 100644
--- a/target/linux/generic/backport-5.10/790-v5.15-0001-net-dsa-b53-Fix-calculating-number-of-switch-ports.patch
+++ b/target/linux/generic/backport-5.10/792-v5.15-0001-net-dsa-b53-Fix-calculating-number-of-switch-ports.patch
@@ -26,7 +26,7 @@ Signed-off-by: David S. Miller <davem@davemloft.net>
 
 --- a/drivers/net/dsa/b53/b53_common.c
 +++ b/drivers/net/dsa/b53/b53_common.c
-@@ -2556,9 +2556,8 @@ static int b53_switch_init(struct b53_de
+@@ -2584,9 +2584,8 @@ static int b53_switch_init(struct b53_de
  			dev->cpu_port = 5;
  	}
  
diff --git a/target/linux/generic/backport-5.10/790-v5.15-0002-net-dsa-b53-Set-correct-number-of-ports-in-the-DSA-s.patch b/target/linux/generic/backport-5.10/792-v5.15-0002-net-dsa-b53-Set-correct-number-of-ports-in-the-DSA-s.patch
index 404389dc48..361b2984fc 100644
--- a/target/linux/generic/backport-5.10/790-v5.15-0002-net-dsa-b53-Set-correct-number-of-ports-in-the-DSA-s.patch
+++ b/target/linux/generic/backport-5.10/792-v5.15-0002-net-dsa-b53-Set-correct-number-of-ports-in-the-DSA-s.patch
@@ -24,7 +24,7 @@ Signed-off-by: David S. Miller <davem@davemloft.net>
 
 --- a/drivers/net/dsa/b53/b53_common.c
 +++ b/drivers/net/dsa/b53/b53_common.c
-@@ -2559,6 +2559,8 @@ static int b53_switch_init(struct b53_de
+@@ -2587,6 +2587,8 @@ static int b53_switch_init(struct b53_de
  	dev->enabled_ports |= BIT(dev->cpu_port);
  	dev->num_ports = fls(dev->enabled_ports);
  
@@ -33,7 +33,7 @@ Signed-off-by: David S. Miller <davem@davemloft.net>
  	/* Include non standard CPU port built-in PHYs to be probed */
  	if (is539x(dev) || is531x5(dev)) {
  		for (i = 0; i < dev->num_ports; i++) {
-@@ -2603,7 +2605,6 @@ struct b53_device *b53_switch_alloc(stru
+@@ -2631,7 +2633,6 @@ struct b53_device *b53_switch_alloc(stru
  		return NULL;
  
  	ds->dev = base;
diff --git a/target/linux/generic/backport-5.10/792-v5.15-0003-net-dsa-b53-Fix-IMP-port-setup-on-BCM5301x.patch b/target/linux/generic/backport-5.10/792-v5.15-0003-net-dsa-b53-Fix-IMP-port-setup-on-BCM5301x.patch
new file mode 100644
index 0000000000..380a677c50
--- /dev/null
+++ b/target/linux/generic/backport-5.10/792-v5.15-0003-net-dsa-b53-Fix-IMP-port-setup-on-BCM5301x.patch
@@ -0,0 +1,237 @@
+From 63f8428b4077de3664eb0b252393c839b0b293ec Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
+Date: Sun, 5 Sep 2021 19:23:28 +0200
+Subject: [PATCH] net: dsa: b53: Fix IMP port setup on BCM5301x
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Broadcom's b53 switches have one IMP (Inband Management Port) that needs
+to be programmed using its own designed register. IMP port may be
+different than CPU port - especially on devices with multiple CPU ports.
+
+For that reason it's required to explicitly note IMP port index and
+check for it when choosing a register to use.
+
+This commit fixes BCM5301x support. Those switches use CPU port 5 while
+their IMP port is 8. Before this patch b53 was trying to program port 5
+with B53_PORT_OVERRIDE_CTRL instead of B53_GMII_PORT_OVERRIDE_CTRL(5).
+
+It may be possible to also replace "cpu_port" usages with
+dsa_is_cpu_port() but that is out of the scope of thix BCM5301x fix.
+
+Fixes: 967dd82ffc52 ("net: dsa: b53: Add support for Broadcom RoboSwitch")
+Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+---
+ drivers/net/dsa/b53/b53_common.c | 28 +++++++++++++++++++++++++---
+ drivers/net/dsa/b53/b53_priv.h   |  1 +
+ 2 files changed, 26 insertions(+), 3 deletions(-)
+
+--- a/drivers/net/dsa/b53/b53_common.c
++++ b/drivers/net/dsa/b53/b53_common.c
+@@ -1109,7 +1109,7 @@ static void b53_force_link(struct b53_de
+ 	u8 reg, val, off;
+ 
+ 	/* Override the port settings */
+-	if (port == dev->cpu_port) {
++	if (port == dev->imp_port) {
+ 		off = B53_PORT_OVERRIDE_CTRL;
+ 		val = PORT_OVERRIDE_EN;
+ 	} else {
+@@ -1133,7 +1133,7 @@ static void b53_force_port_config(struct
+ 	u8 reg, val, off;
+ 
+ 	/* Override the port settings */
+-	if (port == dev->cpu_port) {
++	if (port == dev->imp_port) {
+ 		off = B53_PORT_OVERRIDE_CTRL;
+ 		val = PORT_OVERRIDE_EN;
+ 	} else {
+@@ -1201,7 +1201,7 @@ static void b53_adjust_link(struct dsa_s
+ 	b53_force_link(dev, port, phydev->link);
+ 
+ 	if (is531x5(dev) && phy_interface_is_rgmii(phydev)) {
+-		if (port == 8)
++		if (port == dev->imp_port)
+ 			off = B53_RGMII_CTRL_IMP;
+ 		else
+ 			off = B53_RGMII_CTRL_P(port);
+@@ -2266,6 +2266,7 @@ struct b53_chip_data {
+ 	const char *dev_name;
+ 	u16 vlans;
+ 	u16 enabled_ports;
++	u8 imp_port;
+ 	u8 cpu_port;
+ 	u8 vta_regs[3];
+ 	u8 arl_bins;
+@@ -2290,6 +2291,7 @@ static const struct b53_chip_data b53_sw
+ 		.enabled_ports = 0x1f,
+ 		.arl_bins = 2,
+ 		.arl_buckets = 1024,
++		.imp_port = 5,
+ 		.cpu_port = B53_CPU_PORT_25,
+ 		.duplex_reg = B53_DUPLEX_STAT_FE,
+ 	},
+@@ -2300,6 +2302,7 @@ static const struct b53_chip_data b53_sw
+ 		.enabled_ports = 0x1f,
+ 		.arl_bins = 2,
+ 		.arl_buckets = 1024,
++		.imp_port = 5,
+ 		.cpu_port = B53_CPU_PORT_25,
+ 		.duplex_reg = B53_DUPLEX_STAT_FE,
+ 	},
+@@ -2310,6 +2313,7 @@ static const struct b53_chip_data b53_sw
+ 		.enabled_ports = 0x1f,
+ 		.arl_bins = 4,
+ 		.arl_buckets = 1024,
++		.imp_port = 8,
+ 		.cpu_port = B53_CPU_PORT,
+ 		.vta_regs = B53_VTA_REGS,
+ 		.duplex_reg = B53_DUPLEX_STAT_GE,
+@@ -2323,6 +2327,7 @@ static const struct b53_chip_data b53_sw
+ 		.enabled_ports = 0x1f,
+ 		.arl_bins = 4,
+ 		.arl_buckets = 1024,
++		.imp_port = 8,
+ 		.cpu_port = B53_CPU_PORT,
+ 		.vta_regs = B53_VTA_REGS,
+ 		.duplex_reg = B53_DUPLEX_STAT_GE,
+@@ -2336,6 +2341,7 @@ static const struct b53_chip_data b53_sw
+ 		.enabled_ports = 0x1f,
+ 		.arl_bins = 4,
+ 		.arl_buckets = 1024,
++		.imp_port = 8,
+ 		.cpu_port = B53_CPU_PORT,
+ 		.vta_regs = B53_VTA_REGS_9798,
+ 		.duplex_reg = B53_DUPLEX_STAT_GE,
+@@ -2349,6 +2355,7 @@ static const struct b53_chip_data b53_sw
+ 		.enabled_ports = 0x7f,
+ 		.arl_bins = 4,
+ 		.arl_buckets = 1024,
++		.imp_port = 8,
+ 		.cpu_port = B53_CPU_PORT,
+ 		.vta_regs = B53_VTA_REGS_9798,
+ 		.duplex_reg = B53_DUPLEX_STAT_GE,
+@@ -2363,6 +2370,7 @@ static const struct b53_chip_data b53_sw
+ 		.arl_bins = 4,
+ 		.arl_buckets = 1024,
+ 		.vta_regs = B53_VTA_REGS,
++		.imp_port = 8,
+ 		.cpu_port = B53_CPU_PORT,
+ 		.duplex_reg = B53_DUPLEX_STAT_GE,
+ 		.jumbo_pm_reg = B53_JUMBO_PORT_MASK,
+@@ -2375,6 +2383,7 @@ static const struct b53_chip_data b53_sw
+ 		.enabled_ports = 0xff,
+ 		.arl_bins = 4,
+ 		.arl_buckets = 1024,
++		.imp_port = 8,
+ 		.cpu_port = B53_CPU_PORT,
+ 		.vta_regs = B53_VTA_REGS,
+ 		.duplex_reg = B53_DUPLEX_STAT_GE,
+@@ -2388,6 +2397,7 @@ static const struct b53_chip_data b53_sw
+ 		.enabled_ports = 0x1ff,
+ 		.arl_bins = 4,
+ 		.arl_buckets = 1024,
++		.imp_port = 8,
+ 		.cpu_port = B53_CPU_PORT,
+ 		.vta_regs = B53_VTA_REGS,
+ 		.duplex_reg = B53_DUPLEX_STAT_GE,
+@@ -2401,6 +2411,7 @@ static const struct b53_chip_data b53_sw
+ 		.enabled_ports = 0, /* pdata must provide them */
+ 		.arl_bins = 4,
+ 		.arl_buckets = 1024,
++		.imp_port = 8,
+ 		.cpu_port = B53_CPU_PORT,
+ 		.vta_regs = B53_VTA_REGS_63XX,
+ 		.duplex_reg = B53_DUPLEX_STAT_63XX,
+@@ -2414,6 +2425,7 @@ static const struct b53_chip_data b53_sw
+ 		.enabled_ports = 0x1f,
+ 		.arl_bins = 4,
+ 		.arl_buckets = 1024,
++		.imp_port = 8,
+ 		.cpu_port = B53_CPU_PORT_25, /* TODO: auto detect */
+ 		.vta_regs = B53_VTA_REGS,
+ 		.duplex_reg = B53_DUPLEX_STAT_GE,
+@@ -2427,6 +2439,7 @@ static const struct b53_chip_data b53_sw
+ 		.enabled_ports = 0x1bf,
+ 		.arl_bins = 4,
+ 		.arl_buckets = 1024,
++		.imp_port = 8,
+ 		.cpu_port = B53_CPU_PORT_25, /* TODO: auto detect */
+ 		.vta_regs = B53_VTA_REGS,
+ 		.duplex_reg = B53_DUPLEX_STAT_GE,
+@@ -2440,6 +2453,7 @@ static const struct b53_chip_data b53_sw
+ 		.enabled_ports = 0x1bf,
+ 		.arl_bins = 4,
+ 		.arl_buckets = 1024,
++		.imp_port = 8,
+ 		.cpu_port = B53_CPU_PORT_25, /* TODO: auto detect */
+ 		.vta_regs = B53_VTA_REGS,
+ 		.duplex_reg = B53_DUPLEX_STAT_GE,
+@@ -2453,6 +2467,7 @@ static const struct b53_chip_data b53_sw
+ 		.enabled_ports = 0x1f,
+ 		.arl_bins = 4,
+ 		.arl_buckets = 1024,
++		.imp_port = 8,
+ 		.cpu_port = B53_CPU_PORT_25, /* TODO: auto detect */
+ 		.vta_regs = B53_VTA_REGS,
+ 		.duplex_reg = B53_DUPLEX_STAT_GE,
+@@ -2466,6 +2481,7 @@ static const struct b53_chip_data b53_sw
+ 		.enabled_ports = 0x1f,
+ 		.arl_bins = 4,
+ 		.arl_buckets = 1024,
++		.imp_port = 8,
+ 		.cpu_port = B53_CPU_PORT_25, /* TODO: auto detect */
+ 		.vta_regs = B53_VTA_REGS,
+ 		.duplex_reg = B53_DUPLEX_STAT_GE,
+@@ -2479,6 +2495,7 @@ static const struct b53_chip_data b53_sw
+ 		.enabled_ports = 0x1ff,
+ 		.arl_bins = 4,
+ 		.arl_buckets = 1024,
++		.imp_port = 8,
+ 		.cpu_port = B53_CPU_PORT,
+ 		.vta_regs = B53_VTA_REGS,
+ 		.duplex_reg = B53_DUPLEX_STAT_GE,
+@@ -2492,6 +2509,7 @@ static const struct b53_chip_data b53_sw
+ 		.enabled_ports = 0x103,
+ 		.arl_bins = 4,
+ 		.arl_buckets = 1024,
++		.imp_port = 8,
+ 		.cpu_port = B53_CPU_PORT,
+ 		.vta_regs = B53_VTA_REGS,
+ 		.duplex_reg = B53_DUPLEX_STAT_GE,
+@@ -2505,6 +2523,7 @@ static const struct b53_chip_data b53_sw
+ 		.enabled_ports = 0x1ff,
+ 		.arl_bins = 4,
+ 		.arl_buckets = 1024,
++		.imp_port = 8,
+ 		.cpu_port = B53_CPU_PORT,
+ 		.vta_regs = B53_VTA_REGS,
+ 		.duplex_reg = B53_DUPLEX_STAT_GE,
+@@ -2518,6 +2537,7 @@ static const struct b53_chip_data b53_sw
+ 		.enabled_ports = 0x1ff,
+ 		.arl_bins = 4,
+ 		.arl_buckets = 256,
++		.imp_port = 8,
+ 		.cpu_port = B53_CPU_PORT,
+ 		.vta_regs = B53_VTA_REGS,
+ 		.duplex_reg = B53_DUPLEX_STAT_GE,
+@@ -2543,6 +2563,7 @@ static int b53_switch_init(struct b53_de
+ 			dev->vta_regs[1] = chip->vta_regs[1];
+ 			dev->vta_regs[2] = chip->vta_regs[2];
+ 			dev->jumbo_pm_reg = chip->jumbo_pm_reg;
++			dev->imp_port = chip->imp_port;
+ 			dev->cpu_port = chip->cpu_port;
+ 			dev->num_vlans = chip->vlans;
+ 			dev->num_arl_bins = chip->arl_bins;
+--- a/drivers/net/dsa/b53/b53_priv.h
++++ b/drivers/net/dsa/b53/b53_priv.h
+@@ -122,6 +122,7 @@ struct b53_device {
+ 
+ 	/* used ports mask */
+ 	u16 enabled_ports;
++	unsigned int imp_port;
+ 	unsigned int cpu_port;
+ 
+ 	/* connect specific data */
diff --git a/target/linux/generic/backport-5.10/793-v5.16-0001-net-dsa-b53-Include-all-ports-in-enabled_ports.patch b/target/linux/generic/backport-5.10/793-v5.16-0001-net-dsa-b53-Include-all-ports-in-enabled_ports.patch
new file mode 100644
index 0000000000..d80b5db714
--- /dev/null
+++ b/target/linux/generic/backport-5.10/793-v5.16-0001-net-dsa-b53-Include-all-ports-in-enabled_ports.patch
@@ -0,0 +1,131 @@
+From 983d96a9116a328668601555d96736261d33170c Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
+Date: Thu, 16 Sep 2021 14:03:51 +0200
+Subject: [PATCH] net: dsa: b53: Include all ports in "enabled_ports"
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Make "enabled_ports" bitfield contain all available switch ports
+including a CPU port. This way there is no need for fixup during
+initialization.
+
+For BCM53010, BCM53018 and BCM53019 include also other available ports.
+
+Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
+Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
+Tested-by: Florian Fainelli <f.fainelli@gmail.com>
+Signed-off-by: Jakub Kicinski <kuba@kernel.org>
+---
+ drivers/net/dsa/b53/b53_common.c | 23 +++++++++++------------
+ 1 file changed, 11 insertions(+), 12 deletions(-)
+
+--- a/drivers/net/dsa/b53/b53_common.c
++++ b/drivers/net/dsa/b53/b53_common.c
+@@ -2288,7 +2288,7 @@ static const struct b53_chip_data b53_sw
+ 		.chip_id = BCM5325_DEVICE_ID,
+ 		.dev_name = "BCM5325",
+ 		.vlans = 16,
+-		.enabled_ports = 0x1f,
++		.enabled_ports = 0x3f,
+ 		.arl_bins = 2,
+ 		.arl_buckets = 1024,
+ 		.imp_port = 5,
+@@ -2299,7 +2299,7 @@ static const struct b53_chip_data b53_sw
+ 		.chip_id = BCM5365_DEVICE_ID,
+ 		.dev_name = "BCM5365",
+ 		.vlans = 256,
+-		.enabled_ports = 0x1f,
++		.enabled_ports = 0x3f,
+ 		.arl_bins = 2,
+ 		.arl_buckets = 1024,
+ 		.imp_port = 5,
+@@ -2310,7 +2310,7 @@ static const struct b53_chip_data b53_sw
+ 		.chip_id = BCM5389_DEVICE_ID,
+ 		.dev_name = "BCM5389",
+ 		.vlans = 4096,
+-		.enabled_ports = 0x1f,
++		.enabled_ports = 0x11f,
+ 		.arl_bins = 4,
+ 		.arl_buckets = 1024,
+ 		.imp_port = 8,
+@@ -2324,7 +2324,7 @@ static const struct b53_chip_data b53_sw
+ 		.chip_id = BCM5395_DEVICE_ID,
+ 		.dev_name = "BCM5395",
+ 		.vlans = 4096,
+-		.enabled_ports = 0x1f,
++		.enabled_ports = 0x11f,
+ 		.arl_bins = 4,
+ 		.arl_buckets = 1024,
+ 		.imp_port = 8,
+@@ -2338,7 +2338,7 @@ static const struct b53_chip_data b53_sw
+ 		.chip_id = BCM5397_DEVICE_ID,
+ 		.dev_name = "BCM5397",
+ 		.vlans = 4096,
+-		.enabled_ports = 0x1f,
++		.enabled_ports = 0x11f,
+ 		.arl_bins = 4,
+ 		.arl_buckets = 1024,
+ 		.imp_port = 8,
+@@ -2352,7 +2352,7 @@ static const struct b53_chip_data b53_sw
+ 		.chip_id = BCM5398_DEVICE_ID,
+ 		.dev_name = "BCM5398",
+ 		.vlans = 4096,
+-		.enabled_ports = 0x7f,
++		.enabled_ports = 0x17f,
+ 		.arl_bins = 4,
+ 		.arl_buckets = 1024,
+ 		.imp_port = 8,
+@@ -2366,7 +2366,7 @@ static const struct b53_chip_data b53_sw
+ 		.chip_id = BCM53115_DEVICE_ID,
+ 		.dev_name = "BCM53115",
+ 		.vlans = 4096,
+-		.enabled_ports = 0x1f,
++		.enabled_ports = 0x11f,
+ 		.arl_bins = 4,
+ 		.arl_buckets = 1024,
+ 		.vta_regs = B53_VTA_REGS,
+@@ -2380,7 +2380,7 @@ static const struct b53_chip_data b53_sw
+ 		.chip_id = BCM53125_DEVICE_ID,
+ 		.dev_name = "BCM53125",
+ 		.vlans = 4096,
+-		.enabled_ports = 0xff,
++		.enabled_ports = 0x1ff,
+ 		.arl_bins = 4,
+ 		.arl_buckets = 1024,
+ 		.imp_port = 8,
+@@ -2422,7 +2422,7 @@ static const struct b53_chip_data b53_sw
+ 		.chip_id = BCM53010_DEVICE_ID,
+ 		.dev_name = "BCM53010",
+ 		.vlans = 4096,
+-		.enabled_ports = 0x1f,
++		.enabled_ports = 0x1bf,
+ 		.arl_bins = 4,
+ 		.arl_buckets = 1024,
+ 		.imp_port = 8,
+@@ -2464,7 +2464,7 @@ static const struct b53_chip_data b53_sw
+ 		.chip_id = BCM53018_DEVICE_ID,
+ 		.dev_name = "BCM53018",
+ 		.vlans = 4096,
+-		.enabled_ports = 0x1f,
++		.enabled_ports = 0x1bf,
+ 		.arl_bins = 4,
+ 		.arl_buckets = 1024,
+ 		.imp_port = 8,
+@@ -2478,7 +2478,7 @@ static const struct b53_chip_data b53_sw
+ 		.chip_id = BCM53019_DEVICE_ID,
+ 		.dev_name = "BCM53019",
+ 		.vlans = 4096,
+-		.enabled_ports = 0x1f,
++		.enabled_ports = 0x1bf,
+ 		.arl_bins = 4,
+ 		.arl_buckets = 1024,
+ 		.imp_port = 8,
+@@ -2605,7 +2605,6 @@ static int b53_switch_init(struct b53_de
+ 			dev->cpu_port = 5;
+ 	}
+ 
+-	dev->enabled_ports |= BIT(dev->cpu_port);
+ 	dev->num_ports = fls(dev->enabled_ports);
+ 
+ 	dev->ds->num_ports = min_t(unsigned int, dev->num_ports, DSA_MAX_PORTS);
diff --git a/target/linux/generic/backport-5.10/793-v5.16-0002-net-dsa-b53-Drop-BCM5301x-workaround-for-a-wrong-CPU.patch b/target/linux/generic/backport-5.10/793-v5.16-0002-net-dsa-b53-Drop-BCM5301x-workaround-for-a-wrong-CPU.patch
new file mode 100644
index 0000000000..4a4f8e940d
--- /dev/null
+++ b/target/linux/generic/backport-5.10/793-v5.16-0002-net-dsa-b53-Drop-BCM5301x-workaround-for-a-wrong-CPU.patch
@@ -0,0 +1,42 @@
+From b290c6384afabbca5ae6e2af72fb1b2bc37922be Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
+Date: Thu, 16 Sep 2021 14:03:52 +0200
+Subject: [PATCH] net: dsa: b53: Drop BCM5301x workaround for a wrong CPU/IMP
+ port
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+On BCM5301x port 8 requires a fixed link when used.
+
+Years ago when b53 was an OpenWrt downstream driver (with configuration
+based on sometimes bugged NVRAM) there was a need for a fixup. In case
+of forcing fixed link for (incorrectly specified) port 5 the code had to
+actually setup port 8 link.
+
+For upstream b53 driver with setup based on DT there is no need for that
+workaround. In DT we have and require correct ports setup.
+
+Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
+Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
+Tested-by: Florian Fainelli <f.fainelli@gmail.com>
+Signed-off-by: Jakub Kicinski <kuba@kernel.org>
+---
+ drivers/net/dsa/b53/b53_common.c | 6 ------
+ 1 file changed, 6 deletions(-)
+
+--- a/drivers/net/dsa/b53/b53_common.c
++++ b/drivers/net/dsa/b53/b53_common.c
+@@ -1256,12 +1256,6 @@ static void b53_adjust_link(struct dsa_s
+ 				return;
+ 			}
+ 		}
+-	} else if (is5301x(dev)) {
+-		if (port != dev->cpu_port) {
+-			b53_force_port_config(dev, dev->cpu_port, 2000,
+-					      DUPLEX_FULL, true, true);
+-			b53_force_link(dev, dev->cpu_port, 1);
+-		}
+ 	}
+ 
+ 	/* Re-negotiate EEE if it was enabled already */
diff --git a/target/linux/generic/backport-5.10/793-v5.16-0003-net-dsa-b53-Improve-flow-control-setup-on-BCM5301x.patch b/target/linux/generic/backport-5.10/793-v5.16-0003-net-dsa-b53-Improve-flow-control-setup-on-BCM5301x.patch
new file mode 100644
index 0000000000..3954ee4aac
--- /dev/null
+++ b/target/linux/generic/backport-5.10/793-v5.16-0003-net-dsa-b53-Improve-flow-control-setup-on-BCM5301x.patch
@@ -0,0 +1,32 @@
+From 3ff26b29230c54fea2353b63124c589b61953e14 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
+Date: Thu, 16 Sep 2021 14:03:53 +0200
+Subject: [PATCH] net: dsa: b53: Improve flow control setup on BCM5301x
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+According to the Broadcom's reference driver flow control needs to be
+enabled for any CPU switch port (5, 7 or 8 - depending on which one is
+used). Current code makes it work only for the port 5. Use
+dsa_is_cpu_port() which solved that problem.
+
+Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
+Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
+Tested-by: Florian Fainelli <f.fainelli@gmail.com>
+Signed-off-by: Jakub Kicinski <kuba@kernel.org>
+---
+ drivers/net/dsa/b53/b53_common.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/drivers/net/dsa/b53/b53_common.c
++++ b/drivers/net/dsa/b53/b53_common.c
+@@ -1187,7 +1187,7 @@ static void b53_adjust_link(struct dsa_s
+ 		return;
+ 
+ 	/* Enable flow control on BCM5301x's CPU port */
+-	if (is5301x(dev) && port == dev->cpu_port)
++	if (is5301x(dev) && dsa_is_cpu_port(ds, port))
+ 		tx_pause = rx_pause = true;
+ 
+ 	if (phydev->pause) {
diff --git a/target/linux/generic/backport-5.10/793-v5.16-0004-net-dsa-b53-Drop-unused-cpu_port-field.patch b/target/linux/generic/backport-5.10/793-v5.16-0004-net-dsa-b53-Drop-unused-cpu_port-field.patch
new file mode 100644
index 0000000000..9e687b1488
--- /dev/null
+++ b/target/linux/generic/backport-5.10/793-v5.16-0004-net-dsa-b53-Drop-unused-cpu_port-field.patch
@@ -0,0 +1,205 @@
+From 7d5af56418d7d01e43247a33b6fe6492ea871923 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
+Date: Thu, 16 Sep 2021 14:03:54 +0200
+Subject: [PATCH] net: dsa: b53: Drop unused "cpu_port" field
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+It's set but never used anymore.
+
+Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
+Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
+Tested-by: Florian Fainelli <f.fainelli@gmail.com>
+Signed-off-by: Jakub Kicinski <kuba@kernel.org>
+---
+ drivers/net/dsa/b53/b53_common.c | 28 ----------------------------
+ drivers/net/dsa/b53/b53_priv.h   |  1 -
+ 2 files changed, 29 deletions(-)
+
+--- a/drivers/net/dsa/b53/b53_common.c
++++ b/drivers/net/dsa/b53/b53_common.c
+@@ -2286,7 +2286,6 @@ static const struct b53_chip_data b53_sw
+ 		.arl_bins = 2,
+ 		.arl_buckets = 1024,
+ 		.imp_port = 5,
+-		.cpu_port = B53_CPU_PORT_25,
+ 		.duplex_reg = B53_DUPLEX_STAT_FE,
+ 	},
+ 	{
+@@ -2297,7 +2296,6 @@ static const struct b53_chip_data b53_sw
+ 		.arl_bins = 2,
+ 		.arl_buckets = 1024,
+ 		.imp_port = 5,
+-		.cpu_port = B53_CPU_PORT_25,
+ 		.duplex_reg = B53_DUPLEX_STAT_FE,
+ 	},
+ 	{
+@@ -2308,7 +2306,6 @@ static const struct b53_chip_data b53_sw
+ 		.arl_bins = 4,
+ 		.arl_buckets = 1024,
+ 		.imp_port = 8,
+-		.cpu_port = B53_CPU_PORT,
+ 		.vta_regs = B53_VTA_REGS,
+ 		.duplex_reg = B53_DUPLEX_STAT_GE,
+ 		.jumbo_pm_reg = B53_JUMBO_PORT_MASK,
+@@ -2322,7 +2319,6 @@ static const struct b53_chip_data b53_sw
+ 		.arl_bins = 4,
+ 		.arl_buckets = 1024,
+ 		.imp_port = 8,
+-		.cpu_port = B53_CPU_PORT,
+ 		.vta_regs = B53_VTA_REGS,
+ 		.duplex_reg = B53_DUPLEX_STAT_GE,
+ 		.jumbo_pm_reg = B53_JUMBO_PORT_MASK,
+@@ -2336,7 +2332,6 @@ static const struct b53_chip_data b53_sw
+ 		.arl_bins = 4,
+ 		.arl_buckets = 1024,
+ 		.imp_port = 8,
+-		.cpu_port = B53_CPU_PORT,
+ 		.vta_regs = B53_VTA_REGS_9798,
+ 		.duplex_reg = B53_DUPLEX_STAT_GE,
+ 		.jumbo_pm_reg = B53_JUMBO_PORT_MASK,
+@@ -2350,7 +2345,6 @@ static const struct b53_chip_data b53_sw
+ 		.arl_bins = 4,
+ 		.arl_buckets = 1024,
+ 		.imp_port = 8,
+-		.cpu_port = B53_CPU_PORT,
+ 		.vta_regs = B53_VTA_REGS_9798,
+ 		.duplex_reg = B53_DUPLEX_STAT_GE,
+ 		.jumbo_pm_reg = B53_JUMBO_PORT_MASK,
+@@ -2365,7 +2359,6 @@ static const struct b53_chip_data b53_sw
+ 		.arl_buckets = 1024,
+ 		.vta_regs = B53_VTA_REGS,
+ 		.imp_port = 8,
+-		.cpu_port = B53_CPU_PORT,
+ 		.duplex_reg = B53_DUPLEX_STAT_GE,
+ 		.jumbo_pm_reg = B53_JUMBO_PORT_MASK,
+ 		.jumbo_size_reg = B53_JUMBO_MAX_SIZE,
+@@ -2378,7 +2371,6 @@ static const struct b53_chip_data b53_sw
+ 		.arl_bins = 4,
+ 		.arl_buckets = 1024,
+ 		.imp_port = 8,
+-		.cpu_port = B53_CPU_PORT,
+ 		.vta_regs = B53_VTA_REGS,
+ 		.duplex_reg = B53_DUPLEX_STAT_GE,
+ 		.jumbo_pm_reg = B53_JUMBO_PORT_MASK,
+@@ -2392,7 +2384,6 @@ static const struct b53_chip_data b53_sw
+ 		.arl_bins = 4,
+ 		.arl_buckets = 1024,
+ 		.imp_port = 8,
+-		.cpu_port = B53_CPU_PORT,
+ 		.vta_regs = B53_VTA_REGS,
+ 		.duplex_reg = B53_DUPLEX_STAT_GE,
+ 		.jumbo_pm_reg = B53_JUMBO_PORT_MASK,
+@@ -2406,7 +2397,6 @@ static const struct b53_chip_data b53_sw
+ 		.arl_bins = 4,
+ 		.arl_buckets = 1024,
+ 		.imp_port = 8,
+-		.cpu_port = B53_CPU_PORT,
+ 		.vta_regs = B53_VTA_REGS_63XX,
+ 		.duplex_reg = B53_DUPLEX_STAT_63XX,
+ 		.jumbo_pm_reg = B53_JUMBO_PORT_MASK_63XX,
+@@ -2420,7 +2410,6 @@ static const struct b53_chip_data b53_sw
+ 		.arl_bins = 4,
+ 		.arl_buckets = 1024,
+ 		.imp_port = 8,
+-		.cpu_port = B53_CPU_PORT_25, /* TODO: auto detect */
+ 		.vta_regs = B53_VTA_REGS,
+ 		.duplex_reg = B53_DUPLEX_STAT_GE,
+ 		.jumbo_pm_reg = B53_JUMBO_PORT_MASK,
+@@ -2434,7 +2423,6 @@ static const struct b53_chip_data b53_sw
+ 		.arl_bins = 4,
+ 		.arl_buckets = 1024,
+ 		.imp_port = 8,
+-		.cpu_port = B53_CPU_PORT_25, /* TODO: auto detect */
+ 		.vta_regs = B53_VTA_REGS,
+ 		.duplex_reg = B53_DUPLEX_STAT_GE,
+ 		.jumbo_pm_reg = B53_JUMBO_PORT_MASK,
+@@ -2448,7 +2436,6 @@ static const struct b53_chip_data b53_sw
+ 		.arl_bins = 4,
+ 		.arl_buckets = 1024,
+ 		.imp_port = 8,
+-		.cpu_port = B53_CPU_PORT_25, /* TODO: auto detect */
+ 		.vta_regs = B53_VTA_REGS,
+ 		.duplex_reg = B53_DUPLEX_STAT_GE,
+ 		.jumbo_pm_reg = B53_JUMBO_PORT_MASK,
+@@ -2462,7 +2449,6 @@ static const struct b53_chip_data b53_sw
+ 		.arl_bins = 4,
+ 		.arl_buckets = 1024,
+ 		.imp_port = 8,
+-		.cpu_port = B53_CPU_PORT_25, /* TODO: auto detect */
+ 		.vta_regs = B53_VTA_REGS,
+ 		.duplex_reg = B53_DUPLEX_STAT_GE,
+ 		.jumbo_pm_reg = B53_JUMBO_PORT_MASK,
+@@ -2476,7 +2462,6 @@ static const struct b53_chip_data b53_sw
+ 		.arl_bins = 4,
+ 		.arl_buckets = 1024,
+ 		.imp_port = 8,
+-		.cpu_port = B53_CPU_PORT_25, /* TODO: auto detect */
+ 		.vta_regs = B53_VTA_REGS,
+ 		.duplex_reg = B53_DUPLEX_STAT_GE,
+ 		.jumbo_pm_reg = B53_JUMBO_PORT_MASK,
+@@ -2490,7 +2475,6 @@ static const struct b53_chip_data b53_sw
+ 		.arl_bins = 4,
+ 		.arl_buckets = 1024,
+ 		.imp_port = 8,
+-		.cpu_port = B53_CPU_PORT,
+ 		.vta_regs = B53_VTA_REGS,
+ 		.duplex_reg = B53_DUPLEX_STAT_GE,
+ 		.jumbo_pm_reg = B53_JUMBO_PORT_MASK,
+@@ -2504,7 +2488,6 @@ static const struct b53_chip_data b53_sw
+ 		.arl_bins = 4,
+ 		.arl_buckets = 1024,
+ 		.imp_port = 8,
+-		.cpu_port = B53_CPU_PORT,
+ 		.vta_regs = B53_VTA_REGS,
+ 		.duplex_reg = B53_DUPLEX_STAT_GE,
+ 		.jumbo_pm_reg = B53_JUMBO_PORT_MASK,
+@@ -2518,7 +2501,6 @@ static const struct b53_chip_data b53_sw
+ 		.arl_bins = 4,
+ 		.arl_buckets = 1024,
+ 		.imp_port = 8,
+-		.cpu_port = B53_CPU_PORT,
+ 		.vta_regs = B53_VTA_REGS,
+ 		.duplex_reg = B53_DUPLEX_STAT_GE,
+ 		.jumbo_pm_reg = B53_JUMBO_PORT_MASK,
+@@ -2532,7 +2514,6 @@ static const struct b53_chip_data b53_sw
+ 		.arl_bins = 4,
+ 		.arl_buckets = 256,
+ 		.imp_port = 8,
+-		.cpu_port = B53_CPU_PORT,
+ 		.vta_regs = B53_VTA_REGS,
+ 		.duplex_reg = B53_DUPLEX_STAT_GE,
+ 		.jumbo_pm_reg = B53_JUMBO_PORT_MASK,
+@@ -2558,7 +2539,6 @@ static int b53_switch_init(struct b53_de
+ 			dev->vta_regs[2] = chip->vta_regs[2];
+ 			dev->jumbo_pm_reg = chip->jumbo_pm_reg;
+ 			dev->imp_port = chip->imp_port;
+-			dev->cpu_port = chip->cpu_port;
+ 			dev->num_vlans = chip->vlans;
+ 			dev->num_arl_bins = chip->arl_bins;
+ 			dev->num_arl_buckets = chip->arl_buckets;
+@@ -2590,13 +2570,6 @@ static int b53_switch_init(struct b53_de
+ 			break;
+ #endif
+ 		}
+-	} else if (dev->chip_id == BCM53115_DEVICE_ID) {
+-		u64 strap_value;
+-
+-		b53_read48(dev, B53_STAT_PAGE, B53_STRAP_VALUE, &strap_value);
+-		/* use second IMP port if GMII is enabled */
+-		if (strap_value & SV_GMII_CTRL_115)
+-			dev->cpu_port = 5;
+ 	}
+ 
+ 	dev->num_ports = fls(dev->enabled_ports);
+--- a/drivers/net/dsa/b53/b53_priv.h
++++ b/drivers/net/dsa/b53/b53_priv.h
+@@ -123,7 +123,6 @@ struct b53_device {
+ 	/* used ports mask */
+ 	u16 enabled_ports;
+ 	unsigned int imp_port;
+-	unsigned int cpu_port;
+ 
+ 	/* connect specific data */
+ 	u8 current_page;