diff options
| author | Oleksij Rempel <o.rempel@pengutronix.de> | 2022-12-05 06:22:30 +0100 |
|---|---|---|
| committer | Paolo Abeni <pabeni@redhat.com> | 2022-12-07 11:57:58 +0100 |
| commit | 29d1e85f45e03c9fd1b8985f983f33c021e130c8 (patch) | |
| tree | e4f31b4ba722611b104da68357916df154068a44 /drivers/net/dsa/microchip/ksz8.h | |
| parent | 6f1b986a43ce9aa67b11a7e54ac75530705d04e7 (diff) | |
net: dsa: microchip: ksz8: add MTU configuration support
Make MTU configurable on KSZ87xx and KSZ88xx series of switches.
Before this patch, pre-configured behavior was different on different
switch series, due to opposite meaning of the same bit:
- KSZ87xx: Reg 4, Bit 1 - if 1, max frame size is 1532; if 0 - 1514
- KSZ88xx: Reg 4, Bit 1 - if 1, max frame size is 1514; if 0 - 1532
Since the code was telling "... SW_LEGAL_PACKET_DISABLE, true)", I
assume, the idea was to set max frame size to 1532.
With this patch, by setting MTU size 1500, both switch series will be
configured to the 1532 frame limit.
This patch was tested on KSZ8873.
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Acked-by: Arun Ramadoss <arun.ramadoss@microchip.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Diffstat (limited to 'drivers/net/dsa/microchip/ksz8.h')
| -rw-r--r-- | drivers/net/dsa/microchip/ksz8.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/net/dsa/microchip/ksz8.h b/drivers/net/dsa/microchip/ksz8.h index 8582b4b67d98..ea05abfbd51d 100644 --- a/drivers/net/dsa/microchip/ksz8.h +++ b/drivers/net/dsa/microchip/ksz8.h @@ -57,5 +57,6 @@ int ksz8_reset_switch(struct ksz_device *dev); int ksz8_switch_detect(struct ksz_device *dev); int ksz8_switch_init(struct ksz_device *dev); void ksz8_switch_exit(struct ksz_device *dev); +int ksz8_change_mtu(struct ksz_device *dev, int port, int mtu); #endif |