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 /include/linux/phy.h | |
| parent | 6dfcbd7d1d657994a57b53ad4be834eb783f32bc (diff) | |
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 'include/linux/phy.h')
| -rw-r--r-- | include/linux/phy.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/phy.h b/include/linux/phy.h index 543a94751a6b..4c2b8b6e7187 100644 --- a/include/linux/phy.h +++ b/include/linux/phy.h @@ -106,6 +106,7 @@ extern const int phy_basic_ports_array[3]; * @PHY_INTERFACE_MODE_50GBASER: 50GBase-R - with Clause 134 FEC * @PHY_INTERFACE_MODE_LAUI: 50 Gigabit Attachment Unit Interface * @PHY_INTERFACE_MODE_100GBASEP: 100GBase-P - with Clause 134 FEC + * @PHY_INTERFACE_MODE_MIILITE: MII-Lite - MII without RXER TXER CRS COL * @PHY_INTERFACE_MODE_MAX: Book keeping * * Describes the interface between the MAC and PHY. @@ -150,6 +151,7 @@ typedef enum { PHY_INTERFACE_MODE_50GBASER, PHY_INTERFACE_MODE_LAUI, PHY_INTERFACE_MODE_100GBASEP, + PHY_INTERFACE_MODE_MIILITE, PHY_INTERFACE_MODE_MAX, } phy_interface_t; @@ -272,6 +274,8 @@ static inline const char *phy_modes(phy_interface_t interface) return "laui"; case PHY_INTERFACE_MODE_100GBASEP: return "100gbase-p"; + case PHY_INTERFACE_MODE_MIILITE: + return "mii-lite"; default: return "unknown"; } |