Lucien.Jheng d895767c33
net: phy: air_en8811h: add AN8811HB MCU assert/deassert support ...
AN8811HB needs a MCU soft-reset cycle before firmware loading begins.
Assert the MCU (hold it in reset) and immediately deassert (release)
via a dedicated PBUS register pair (0x5cf9f8 / 0x5cf9fc), accessed
through a registered mdio_device at PHY-addr+8.
Add __air_pbus_reg_write() as a low-level helper taking a struct
mdio_device *, create and register the PBUS mdio_device in
an8811hb_probe() and store it in priv->pbusdev, then implement
an8811hb_mcu_assert() / _deassert() on top of it. Add
an8811hb_remove() to unregister the PBUS device on teardown. Wire
both calls into an8811hb_load_firmware() and en8811h_restart_mcu()
so every firmware load or MCU restart on AN8811HB correctly sequences
the reset control registers.
Fixes: 5afda1d734lucienzx159@gmail.com >
Reviewed-by: Andrew Lunn <andrew@lunn.ch >
Link: https://patch.msgid.link/20260524063915.47961-1-lucienzx159@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org >
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d895767c33