diff options
| author | Kamil Horák - 2N <kamilh@axis.com> | 2025-07-08 11:01:37 +0200 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2025-07-09 19:32:30 -0700 |
| commit | 67c0170566b55b1f6ee3567c94ff679104277e2d (patch) | |
| tree | 10e7db8077758d6c7e7c5ea08a243b7122b1b427 /drivers | |
| parent | net: usb: enable the work after stop usbnet by ip down/up (diff) | |
| download | linux-67c0170566b55b1f6ee3567c94ff679104277e2d.tar.gz linux-67c0170566b55b1f6ee3567c94ff679104277e2d.zip | |
net: phy: MII-Lite PHY interface mode
Some Broadcom PHYs are capable to operate in simplified MII mode,
without TXER, RXER, CRS and COL signals as defined for the MII.
The MII-Lite mode can be used on most Ethernet controllers with full
MII interface by just leaving the input signals (RXER, CRS, COL)
inactive. The absence of COL signal makes half-duplex link modes
impossible but does not interfere with BroadR-Reach link modes on
Broadcom PHYs, because they are all full-duplex only.
Add MII-Lite interface mode, especially for Broadcom two-wire PHYs.
Signed-off-by: Kamil Horák - 2N <kamilh@axis.com>
Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://patch.msgid.link/20250708090140.61355-2-kamilh@axis.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/phy/phy-core.c | 1 | ||||
| -rw-r--r-- | drivers/net/phy/phy_caps.c | 4 | ||||
| -rw-r--r-- | drivers/net/phy/phylink.c | 1 |
3 files changed, 6 insertions, 0 deletions
diff --git a/drivers/net/phy/phy-core.c b/drivers/net/phy/phy-core.c index c480bb40fa73..605ca20ae192 100644 --- a/drivers/net/phy/phy-core.c +++ b/drivers/net/phy/phy-core.c @@ -115,6 +115,7 @@ int phy_interface_num_ports(phy_interface_t interface) return 0; case PHY_INTERFACE_MODE_INTERNAL: case PHY_INTERFACE_MODE_MII: + case PHY_INTERFACE_MODE_MIILITE: case PHY_INTERFACE_MODE_GMII: case PHY_INTERFACE_MODE_TBI: case PHY_INTERFACE_MODE_REVMII: diff --git a/drivers/net/phy/phy_caps.c b/drivers/net/phy/phy_caps.c index d11ce1c7e712..2cc9ee97e867 100644 --- a/drivers/net/phy/phy_caps.c +++ b/drivers/net/phy/phy_caps.c @@ -316,6 +316,10 @@ unsigned long phy_caps_from_interface(phy_interface_t interface) link_caps |= BIT(LINK_CAPA_100HD) | BIT(LINK_CAPA_100FD); break; + case PHY_INTERFACE_MODE_MIILITE: + link_caps |= BIT(LINK_CAPA_10FD) | BIT(LINK_CAPA_100FD); + break; + case PHY_INTERFACE_MODE_TBI: case PHY_INTERFACE_MODE_MOCA: case PHY_INTERFACE_MODE_RTBI: diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c index f5473510b762..c7f867b361dd 100644 --- a/drivers/net/phy/phylink.c +++ b/drivers/net/phy/phylink.c @@ -237,6 +237,7 @@ static int phylink_interface_max_speed(phy_interface_t interface) case PHY_INTERFACE_MODE_SMII: case PHY_INTERFACE_MODE_REVMII: case PHY_INTERFACE_MODE_MII: + case PHY_INTERFACE_MODE_MIILITE: return SPEED_100; case PHY_INTERFACE_MODE_TBI: |