Received-SPF: pass (google.com: domain of linux-kernel+bounces-156886-linux.lists.archive=gmail.com@vger.kernel.org designates 147.75.80.249 as permitted sender) client-ip=147.75.80.249;
Date: Wed, 24 Apr 2024 14:42:53 +0200
From: Andrew Lunn <andrew@lunn.ch>
To: Matthias Schiffer <matthias.schiffer@ew.tq-group.com>
Cc: Heiner Kallweit <hkallweit1@gmail.com>,
	Russell King <linux@armlinux.org.uk>,
	"David S. Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
	netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux@ew.tq-group.com
Subject: Re: [PATCH net-next] net: phy: marvell: add support for MV88E6020
 internal PHYs
Message-ID: <19c4b8da-203e-4a81-9531-9ba4a4f750fd@lunn.ch>
References: <20240424121022.160920-1-matthias.schiffer@ew.tq-group.com>
Precedence: bulk
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20240424121022.160920-1-matthias.schiffer@ew.tq-group.com>

On Wed, Apr 24, 2024 at 02:10:22PM +0200, Matthias Schiffer wrote:
> The embedded PHYs of the MV88E6020 (88E6250 family) switch are very
> basic - they do not even have an Extended Address / Page register.
> 
> This adds support for the PHYs to the driver to set up PHY interrupts
> and retrieve error stats. The ethtool stat functions are slightly
> refactored to allow dealing with different marvell_hw_stat definitions.
> 
> The same code should also work with other 88E6250 family switches
> (6250/6220/6071/6070), but it is unclear whether these use the same PHY
> ID - the spec only lists the prefix 0x01410c00 and describes the lower
> 10 bits as reserved, but that seems too unspecific to be useful, as it
> would cover several existing PHY IDs already supported by the driver.

This sounds like:

https://elixir.bootlin.com/linux/latest/source/drivers/net/dsa/mv88e6xxx/chip.c#L3642

So the DSA driver will fill in the lower bits, and it should work for
all devices in the family.

> @@ -4072,6 +4134,7 @@ static struct mdio_device_id __maybe_unused marvell_tbl[] = {
>  	{ MARVELL_PHY_ID_88E1540, MARVELL_PHY_ID_MASK },
>  	{ MARVELL_PHY_ID_88E1545, MARVELL_PHY_ID_MASK },
>  	{ MARVELL_PHY_ID_88E3016, MARVELL_PHY_ID_MASK },
> +	{ MARVELL_PHY_ID_88E6020, MARVELL_PHY_ID_MASK },
>  	{ MARVELL_PHY_ID_88E6341_FAMILY, MARVELL_PHY_ID_MASK },

Please follow the naming convention. MARVELL_PHY_ID_88E6250_FAMILY.

       Andrew