Commits
Alexandru Ardelean committed b422d1b6f76
net: phy: adin: add support MDI/MDIX/Auto-MDI selection The ADIN PHYs support automatic MDI/MDIX negotiation. By default this is disabled, so this is enabled at `config_init`. This is controlled via the PHY Control 1 register. The supported modes are: 1. Manual MDI 2. Manual MDIX 3. Auto MDIX - prefer MDIX 4. Auto MDIX - prefer MDI The phydev mdix & mdix_ctrl fields include modes 3 & 4 into a single auto-mode. So, the default mode this driver enables is 4 when Auto-MDI mode is used. When detecting MDI/MDIX mode, a combination of the PHY Control 1 register and PHY Status 1 register is used to determine the correct MDI/MDIX mode. If Auto-MDI mode is not set, then the manual MDI/MDIX mode is returned. If Auto-MDI mode is set, then MDIX mode is returned differs from the preferred MDI/MDIX mode. This covers all cases where: 1. MDI preferred & Pair01Swapped == MDIX 2. MDIX preferred & Pair01Swapped == MDI 3. MDI preferred & ! Pair01Swapped == MDIX 4. MDIX preferred & ! Pair01Swapped == MDI The preferred MDI/MDIX mode is not configured via SW, but can be configured via HW pins. Note that the `Pair01Swapped` is the Green-Yellow physical pairs. Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com> Signed-off-by: David S. Miller <davem@davemloft.net>