On Wed, Sep 29, 2021 at 11:05 PM Vladimir Oltean vladimir.oltean@nxp.com wrote:
Certain serial SERDES protocols like 1000base-x, 2500base-x, SGMII, USXGMII can operate either in a mode where the PHY (be it on-board or inside an SFP module) passes the link parameters (speed, duplex, pause) to the MAC through in-band through control words standardized by IEEE 802.3 clause 37, or in a mode where the MAC must configure (force) its link parameters based on information obtained out-of-band (MDIO reads, guesswork etc).
In Linux, the OF node property named "managed" is parsed by the phylink framework, and the convention is that if a driver uses phylink, then the presence of this property means that in-band autoneg should be enabled, otherwise it shouldn't.
To be compatible with the OF node bindings of drivers that use phylink in Linux, introduce parsing support for this property in U-Boot too.
Signed-off-by: Vladimir Oltean vladimir.oltean@nxp.com Reviewed-by: Ramon Fried rfried.dev@gmail.com
v1->v2: none
drivers/core/of_extra.c | 12 ++++++++++++ include/dm/of_extra.h | 14 ++++++++++++++ 2 files changed, 26 insertions(+)
Reviewed-by: Bin Meng bmeng.cn@gmail.com