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The RTL8224 has a register to configure a pair swap (from ABCD order to DCBA) providing PCB designers more flexbility when wiring the chip. The swap parameter has to be set correctly for each of the 4 ports before the chip can detect a link. After a reset, this register is (unfortunately) left in a random state, thus it has to be initialized. On most of the devices the bootloader does it once for all and we can rely on the value set, on some other it is not and the kernel has to do it. The MDI pair swap can be set in the device tree using the property enet-phy-pair-order. The property is set to 0 to keep the default order (ABCD), or 1 to reverse the pairs (DCBA). Signed-off-by: Damien Dejean <dam.dejean@gmail.com> Link: https://patch.msgid.link/20260318215502.106528-3-dam.dejean@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
17 lines
381 B
Plaintext
17 lines
381 B
Plaintext
# SPDX-License-Identifier: GPL-2.0-only
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config REALTEK_PHY
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tristate "Realtek PHYs"
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select PHY_PACKAGE
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help
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Currently supports RTL821x/RTL822x and fast ethernet PHYs
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if REALTEK_PHY
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config REALTEK_PHY_HWMON
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bool "HWMON support for Realtek PHYs"
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depends on HWMON && !(REALTEK_PHY=y && HWMON=m)
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help
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Optional hwmon support for the temperature sensor
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endif # REALTEK_PHY
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