Re: [PATCH net-next v9] net: mdio: Add RTL9300 MDIO driver

[Andrew Lunn]

> So far upstream Linux doesn't have generic paged PHY register functions. 

Yes it does:

phy_write_paged() and phy_read_paged().

These do all the locking to make sure they are atomic with respect to
other phy read/writes while the page is selected. The driver just
needs to provide two methods to read the current page and the set the
current page,

https://elixir.bootlin.com/linux/v6.13.6/source/include/linux/phy.h#L1060

	/** @read_page: Return the current PHY register page number */
	int (*read_page)(struct phy_device *dev);
	/** @write_page: Set the current PHY register page number */
	int (*write_page)(struct phy_device *dev, int page);

Andrew