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Nicolai Buchwitz says: ==================== net: phy: add support for disabling autonomous EEE Some PHYs implement autonomous EEE where the PHY manages EEE independently, preventing the MAC from controlling LPI signaling. This conflicts with MACs that implement their own LPI control. This series adds a .disable_autonomous_eee callback to struct phy_driver and calls it from phy_support_eee(). When a MAC indicates it supports EEE, the PHY's autonomous EEE is automatically disabled. The setting is persisted across suspend/resume by re-applying it in phy_init_hw() after soft reset, following the same pattern suggested by Russell King for PHY tunables [1]. Patch 1 adds the phylib infrastructure. Patch 2 implements it for Broadcom BCM54xx (AutogrEEEn). Patch 3 converts the Realtek RTL8211F, which previously unconditionally disabled PHY-mode EEE in config_init. This came up while adding EEE support to the Cadence macb driver (used on Raspberry Pi 5 with a BCM54210PE PHY). The PHY's AutogrEEEn mode prevented the MAC from tracking LPI state. The Realtek RTL8211F has the same pattern, unconditionally disabling PHY-mode EEE with the comment "Disable PHY-mode EEE so LPI is passed to the MAC". Other BCM54xx PHYs likely have the same AutogrEEEn register layout, but I only have access to the BCM54210PE/BCM54213PE datasheets. It would be appreciated if Florian or others could confirm which other BCM54xx variants share this register so we can wire them up too. Tested on Raspberry Pi CM4 (bcmgenet + BCM54210PE), Raspberry Pi CM5 (Cadence GEM + BCM54210PE) and Raspberry Pi 5 (Cadence GEM + BCM54213PE). [1] https://lore.kernel.org/netdev/acuwvoydmJusuj9x@shell.armlinux.org.uk/ ==================== Link: https://patch.msgid.link/20260406-devel-autonomous-eee-v1-0-b335e7143711@tipi-net.de Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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