+static int an855_phy_restore_page(struct an8855_mfd_priv *priv,
+				  int phy) __must_hold(&priv->bus->mdio_lock)
+{
+	/* Check PHY page only for addr shared with switch */
+	if (phy != priv->switch_addr)
+		return 0;
+
+	/* Don't restore page if it's not set to switch page */
+	if (priv->current_page != FIELD_GET(AN8855_PHY_PAGE,
+					    AN8855_PHY_PAGE_EXTENDED_4))
+		return 0;
+
+	/* Restore page to 0, PHY might change page right after but that
+	 * will be ignored as it won't be a switch page.
+	 */
+	return an8855_mii_set_page(priv, phy, AN8855_PHY_PAGE_STANDARD);
+}

I don't really understand what is going on here. Maybe the commit
message needs expanding, or the function names changing.

Generally, i would expect a save/restore action. Save the current
page, swap to the PHY page, do the PHY access, and then restore to the
saved page.

	Andrew