netdev - Re: [PATCH v1 2/2] net: phy: marvell-88q2xxx: add driver for the Marvell 88Q2110 PHY

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Date: Mon, 3 Jul 2023 17:27:20 +0200
From: Francesco Dolcini <francesco@...cini.it>
To: Stefan Eichenberger <eichest@...il.com>
Cc: netdev@...r.kernel.org, andrew@...n.ch, hkallweit1@...il.com,
	linux@...linux.org.uk, davem@...emloft.net, edumazet@...gle.com,
	kuba@...nel.org, pabeni@...hat.com, francesco.dolcini@...adex.com
Subject: Re: [PATCH v1 2/2] net: phy: marvell-88q2xxx: add driver for the
 Marvell 88Q2110 PHY

On Mon, Jul 03, 2023 at 02:44:40PM +0200, Stefan Eichenberger wrote:
> Add a driver for the Marvell 88Q2110. This driver is minimalistic, but
> already allows to detect the link, switch between 100BASE-T1 and
> 1000BASE-T1 and switch between master and slave mode. Autonegotiation
> supported by the PHY is not yet implemented.
> 
> Signed-off-by: Stefan Eichenberger <eichest@...il.com>

...

> --- /dev/null
> +++ b/drivers/net/phy/marvell-88q2xxx.c
> @@ -0,0 +1,217 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * Marvell 88Q2XXX automotive 100BASE-T1/1000BASE-T1 PHY driver
> + */
> +
> +#include <linux/marvell_phy.h>
> +#include <linux/phy.h>
> +#include <linux/ethtool_netlink.h>
sort?

> +#define MARVELL_PHY_ID_88Q2110		0x002b0981
> +
> +static int mv88q2xxx_soft_reset(struct phy_device *phydev)
> +{
> +	phy_write_mmd(phydev, 3, 0x0900, 0x8000);
> +
> +	return 0;
Should we `return phy_write_mmd()` to allow error propagation? This
eventually applies to other functions.

Francesco