linux-toradex.git/drivers/net/dsa/microchip, branch v6.17

net: dsa: microchip: Fix KSZ9477 HSR port setup issue

2025-08-21T02:25:38+00:00

ksz9477_hsr_join() is called once to setup the HSR port membership, but
the port can be enabled later, or disabled and enabled back and the port
membership is not set correctly inside ksz_update_port_member().  The
added code always use the correct HSR port membership for HSR port that
is enabled.

Fixes: 2d61298fdd7b ("net: dsa: microchip: Enable HSR offloading for KSZ9477")
Reported-by: Frieder Schrempf 
Signed-off-by: Tristram Ha 
Reviewed-by: Łukasz Majewski 
Tested-by: Frieder Schrempf 
Reviewed-by: Frieder Schrempf 
Link: https://patch.msgid.link/20250819010457.563286-1-Tristram.Ha@microchip.com
Signed-off-by: Jakub Kicinski

net: dsa: microchip: Fix KSZ8863 reset problem

2025-08-08T20:18:18+00:00

ksz8873_valid_regs[] was added for register access for KSZ8863/KSZ8873
switches, but the reset register is not in the list so
ksz8_reset_switch() does not take any effect.

Replace regmap_update_bits() using ksz_regmap_8 with ksz_rmw8() so that
an error message will be given if the register is not defined.

A side effect of not resetting the switch is the static MAC table is not
cleared.  Further additions to the table will show write error as there
are only 8 entries in the table.

Fixes: d0dec3333040 ("net: dsa: microchip: Add register access control for KSZ8873 chip")
Signed-off-by: Tristram Ha 
Reviewed-by: Oleksij Rempel 
Link: https://patch.msgid.link/20250807005453.8306-1-Tristram.Ha@microchip.com
Signed-off-by: Jakub Kicinski

Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

2025-07-26T18:49:45+00:00

Merge in late fixes to prepare for the 6.17 net-next PR.

Conflicts:

net/core/neighbour.c
  1bbb76a89948 ("neighbour: Fix null-ptr-deref in neigh_flush_dev().")
  13a936bb99fb ("neighbour: Protect tbl->phash_buckets[] with a dedicated mutex.")
  03dc03fa0432 ("neighbor: Add NTF_EXT_VALIDATED flag for externally validated entries")

Adjacent changes:

drivers/net/usb/usbnet.c
  0d9cfc9b8cb1 ("net: usbnet: Avoid potential RCU stall on LINK_CHANGE event")
  2c04d279e857 ("net: usb: Convert tasklet API to new bottom half workqueue mechanism")

net/ipv6/route.c
  31d7d67ba127 ("ipv6: annotate data-races around rt->fib6_nsiblings")
  1caf27297215 ("ipv6: adopt dst_dev() helper")
  3b3ccf9ed05e ("net: Remove unnecessary NULL check for lwtunnel_fill_encap()")

Signed-off-by: Jakub Kicinski

net: dsa: microchip: Disable PTP function of KSZ8463

2025-07-26T00:01:56+00:00

The PTP function of KSZ8463 is on by default.  However, its proprietary
way of storing timestamp directly in a reserved field inside the PTP
message header is not suitable for use with the current Linux PTP stack
implementation.  It is necessary to disable the PTP function to not
interfere the normal operation of the MAC.

Note the PTP driver for KSZ switches does not work for KSZ8463 and is not
activated for it.

Signed-off-by: Tristram Ha 
Reviewed-by: Andrew Lunn 
Link: https://patch.msgid.link/20250725001753.6330-7-Tristram.Ha@microchip.com
Signed-off-by: Jakub Kicinski

net: dsa: microchip: Setup fiber ports for KSZ8463

2025-07-26T00:01:56+00:00

The fiber ports in KSZ8463 cannot be detected internally, so it requires
specifying that condition in the device tree.  Like the one used in
Micrel PHY the port link can only be read and there is no write to the
PHY.  The driver programs registers to operate fiber ports correctly.

Signed-off-by: Tristram Ha 
Reviewed-by: Andrew Lunn 
Link: https://patch.msgid.link/20250725001753.6330-6-Tristram.Ha@microchip.com
Signed-off-by: Jakub Kicinski

net: dsa: microchip: Write switch MAC address differently for KSZ8463

2025-07-26T00:01:56+00:00

KSZ8463 uses 16-bit register definitions so it writes differently for
8-bit switch MAC address.

Signed-off-by: Tristram Ha 
Reviewed-by: Andrew Lunn 
Link: https://patch.msgid.link/20250725001753.6330-5-Tristram.Ha@microchip.com
Signed-off-by: Jakub Kicinski

net: dsa: microchip: Use different registers for KSZ8463

2025-07-26T00:01:56+00:00

KSZ8463 does not use same set of registers as KSZ8863 so it is necessary
to change some registers when using KSZ8463.

Signed-off-by: Tristram Ha 
Reviewed-by: Andrew Lunn 
Link: https://patch.msgid.link/20250725001753.6330-4-Tristram.Ha@microchip.com
Signed-off-by: Jakub Kicinski

net: dsa: microchip: Add KSZ8463 switch support to KSZ DSA driver

2025-07-26T00:01:56+00:00

KSZ8463 switch is a 3-port switch based from KSZ8863.  Its major
difference from other KSZ SPI switches is its register access is not a
simple continual 8-bit transfer with automatic address increase but uses
a byte-enable mechanism specifying 8-bit, 16-bit, or 32-bit access.  Its
registers are also defined in 16-bit format because it shares a design
with a MAC controller using 16-bit access.  As a result some common
register accesses need to be re-arranged.

This patch adds the basic structure for using KSZ8463.  It cannot use the
same regmap table for other KSZ switches as it interprets the 16-bit
value as little-endian and its SPI commands are different.

KSZ8463 uses a byte-enable mechanism to specify 8-bit, 16-bit, and 32-bit
access.  The register is first shifted right by 2 then left by 4.  Extra
4 bits are added.  If the access is 8-bit one of the 4 bits is set.  If
the access is 16-bit two of the 4 bits are set.  If the access is 32-bit
all 4 bits are set.  The SPI command for read or write is then added.

Because of this register transformation separate SPI read and write
functions are provided for KSZ8463.

KSZ8463's internal PHYs use standard PHY register definitions so there is
no need to remap things.  However, the hardware has a bug that the high
word and low word of the PHY id are swapped.  In addition the port
registers are arranged differently so KSZ8463 has its own mapping for
port registers and PHY registers.  Therefore the PORT_CTRL_ADDR macro is
replaced with the get_port_addr helper function.

Signed-off-by: Tristram Ha 
Reviewed-by: Andrew Lunn 
Link: https://patch.msgid.link/20250725001753.6330-3-Tristram.Ha@microchip.com
Signed-off-by: Jakub Kicinski

net: dsa: microchip: Fix wrong rx drop MIB counter for KSZ8863

2025-07-25T20:09:23+00:00

When KSZ8863 support was first added to KSZ driver the RX drop MIB
counter was somehow defined as 0x105.  The TX drop MIB counter
starts at 0x100 for port 1, 0x101 for port 2, and 0x102 for port 3, so
the RX drop MIB counter should start at 0x103 for port 1, 0x104 for
port 2, and 0x105 for port 3.

There are 5 ports for KSZ8895, so its RX drop MIB counter starts at
0x105.

Fixes: 4b20a07e103f ("net: dsa: microchip: ksz8795: add support for ksz88xx chips")
Signed-off-by: Tristram Ha 
Reviewed-by: Oleksij Rempel 
Link: https://patch.msgid.link/20250723030403.56878-1-Tristram.Ha@microchip.com
Signed-off-by: Jakub Kicinski

net: Use dev_fwnode()

2025-06-13T01:46:37+00:00

irq_domain_create_simple() takes fwnode as the first argument. It can be
extracted from the struct device using dev_fwnode() helper instead of
using of_node with of_fwnode_handle().

So use the dev_fwnode() helper.

Signed-off-by: Jiri Slaby (SUSE) 
Link: https://patch.msgid.link/20250611104348.192092-15-jirislaby@kernel.org
Signed-off-by: Jakub Kicinski