Re: [PATCH net-next 09/10] net: dsa: bcm_sf2: stop assigning an OF node to the ds->user_mii_bus
From: Alvin Šipraga <hidden>
Date: 2024-01-04 15:59:12
On Thu, Jan 04, 2024 at 04:00:36PM +0200, Vladimir Oltean wrote:
The bcm_sf2 driver does something strange. Instead of calling
of_mdiobus_register() with an OF node argument, it manually assigns the
bus->dev->of_node and then calls the non-OF mdiobus_register(). This
circumvents some code from __of_mdiobus_register() from running, which
sets the auto-scan mask, parses some device tree properties, etc.
I'm going to go out on a limb and say that the OF node isn't, in fact,
needed at all, and can be removed. The MDIO diversion as initially
implemented in commit 461cd1b03e32 ("net: dsa: bcm_sf2: Register our
slave MDIO bus") looked quite different than it is now, after commit
771089c2a485 ("net: dsa: bcm_sf2: Ensure that MDIO diversion is used").
Initially, it made sense, as bcm_sf2 was registering another set of
driver ops for the "brcm,unimac-mdio" OF node. But now, it deletes all
phandles, which makes "phy-handle"s unable to find PHYs, which means
that it always goes through the OF-unaware dsa_user_phy_connect().
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>Reviewed-by: Alvin Šipraga <redacted>
--- drivers/net/dsa/bcm_sf2.c | 1 - 1 file changed, 1 deletion(-)