net: phy: realtek: read actual speed to detect downshift

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At least some integrated PHY's in RTL8168/RTL8125 chip versions support
downshift, and the actual link speed can be read from a vendor-specific
register. Info about this register was provided by Realtek.
More details about downshift configuration (e.g. number of attempts)
aren't available, therefore the downshift tunable is not implemented.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Heiner Kallweit 2020-03-18 23:07:24 +01:00 • committed by David S. Miller

parent 2c4b58dc75

commit d445dff2df

1 changed files with 59 additions and 1 deletions

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drivers/net/phy/realtek.c

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