diff options
| author | Kamil Horák - 2N <kamilh@axis.com> | 2025-07-08 11:01:39 +0200 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2025-07-09 19:32:31 -0700 |
| commit | 34bf222824f6c9ac03620ee18aaf93d3b6138db3 (patch) | |
| tree | db7d1375ab56fd1c9776da076a17deea50f4c19f /include | |
| parent | fbe937473f3ab8e2ba163840f5563108881340dd (diff) | |
net: phy: bcm5481x: MII-Lite activation
Broadcom PHYs featuring the BroadR-Reach two-wire link mode are usually
capable to operate in simplified MII mode, without TXER, RXER, CRS and
COL signals as defined for the MII. The absence of COL signal makes
half-duplex link modes impossible, however, the BroadR-Reach modes are
all full-duplex only.
Depending on the IC encapsulation, there exist MII-Lite-only PHYs such
as bcm54811 in MLP. The PHY itself is hardware-strapped to select among
multiple RGMII and MII-Lite modes, but the MII-Lite mode must be also
activated by software.
Add MII-Lite activation for bcm5481x PHYs.
Signed-off-by: Kamil Horák - 2N <kamilh@axis.com>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://patch.msgid.link/20250708090140.61355-4-kamilh@axis.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/brcmphy.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/brcmphy.h b/include/linux/brcmphy.h index 028b3e00378e..15c35655f482 100644 --- a/include/linux/brcmphy.h +++ b/include/linux/brcmphy.h @@ -183,6 +183,12 @@ #define BCM_LED_MULTICOLOR_PROGRAM 0xa /* + * Broadcom Synchronous Ethernet Controls (expansion register 0x0E) + */ +#define BCM_EXP_SYNC_ETHERNET (MII_BCM54XX_EXP_SEL_ER + 0x0E) +#define BCM_EXP_SYNC_ETHERNET_MII_LITE BIT(11) + +/* * BCM5482: Shadow registers * Shadow values go into bits [14:10] of register 0x1c to select a shadow * register to access. |