Re: [PATCH net-next v4 2/2] net: mdio: mdio-i2c: Add support for single-byte SMBus operations

[Andrew Lunn]

On Sat, Mar 22, 2025 at 08:57:45AM +0100, Maxime Chevallier wrote:
> PHYs that are within copper SFP modules have their MDIO bus accessible
> through address 0x56 (usually) on the i2c bus. The MDIO-I2C bridge is
> desgned for 16 bits accesses, but we can also perform 8bits accesses by
> reading/writing the high and low bytes sequentially.
> 
> This commit adds support for this type of accesses, thus supporting
> smbus controllers such as the one in the VSC8552.
> 
> This was only tested on Copper SFP modules that embed a Marvell 88e1111
> PHY.
> 
> Tested-by: Sean Anderson <sean.anderson@xxxxxxxxx>
> Signed-off-by: Maxime Chevallier <maxime.chevallier@xxxxxxxxxxx>

Reviewed-by: Andrew Lunn <andrew@xxxxxxx>

    Andrew