diff options
| author | Oleksij Rempel <o.rempel@pengutronix.de> | 2020-05-05 09:35:05 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-05-07 03:45:45 +0300 |
| commit | bdbdac7649fac05f88c9f7ab18121a17fb591687 (patch) | |
| tree | 2f5705f9e39fcfebcdb0f71165e465173b7413dc /drivers/net/phy/phy.c | |
| parent | 3d59a5837c826f5df994ef49acc22902baae6057 (diff) | |
| download | linux-bdbdac7649fac05f88c9f7ab18121a17fb591687.tar.xz | |
ethtool: provide UAPI for PHY master/slave configuration.
This UAPI is needed for BroadR-Reach 100BASE-T1 devices. Due to lack of
auto-negotiation support, we needed to be able to configure the
MASTER-SLAVE role of the port manually or from an application in user
space.
The same UAPI can be used for 1000BASE-T or MultiGBASE-T devices to
force MASTER or SLAVE role. See IEEE 802.3-2018:
22.2.4.3.7 MASTER-SLAVE control register (Register 9)
22.2.4.3.8 MASTER-SLAVE status register (Register 10)
40.5.2 MASTER-SLAVE configuration resolution
45.2.1.185.1 MASTER-SLAVE config value (1.2100.14)
45.2.7.10 MultiGBASE-T AN control 1 register (Register 7.32)
The MASTER-SLAVE role affects the clock configuration:
-------------------------------------------------------------------------------
When the PHY is configured as MASTER, the PMA Transmit function shall
source TX_TCLK from a local clock source. When configured as SLAVE, the
PMA Transmit function shall source TX_TCLK from the clock recovered from
data stream provided by MASTER.
iMX6Q KSZ9031 XXX
------\ /-----------\ /------------\
| | | | |
MAC |<----RGMII----->| PHY Slave |<------>| PHY Master |
|<--- 125 MHz ---+-<------/ | | \ |
------/ \-----------/ \------------/
^
\-TX_TCLK
-------------------------------------------------------------------------------
Since some clock or link related issues are only reproducible in a
specific MASTER-SLAVE-role, MAC and PHY configuration, it is beneficial
to provide generic (not 100BASE-T1 specific) interface to the user space
for configuration flexibility and trouble shooting.
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/phy/phy.c')
| -rw-r--r-- | drivers/net/phy/phy.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c index 72c69a9c8a98..8c22d02b4218 100644 --- a/drivers/net/phy/phy.c +++ b/drivers/net/phy/phy.c @@ -295,7 +295,7 @@ int phy_ethtool_ksettings_set(struct phy_device *phydev, phydev->advertising, autoneg == AUTONEG_ENABLE); phydev->duplex = duplex; - + phydev->master_slave_set = cmd->base.master_slave_cfg; phydev->mdix_ctrl = cmd->base.eth_tp_mdix_ctrl; /* Restart the PHY */ @@ -314,6 +314,8 @@ void phy_ethtool_ksettings_get(struct phy_device *phydev, cmd->base.speed = phydev->speed; cmd->base.duplex = phydev->duplex; + cmd->base.master_slave_cfg = phydev->master_slave_get; + cmd->base.master_slave_state = phydev->master_slave_state; if (phydev->interface == PHY_INTERFACE_MODE_MOCA) cmd->base.port = PORT_BNC; else |