phy: nxp-c45-tja11xx: add timestamping support
Add mii_timestamper interface and register a ptp clock. The package timestamping can work with or without interrupts. RX timestamps are received in the reserved field of the PTP package. TX timestamps are read via MDIO from a set of registers. Signed-off-by: Radu Pirea (NXP OSS) <radu-nicolae.pirea@oss.nxp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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