linux-kernel - Re: [net-next PATCH v2 08/12] net: phy: at803x: move specific at8031 WOL bits to dedicated function

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Date:   Tue, 05 Dec 2023 10:32:55 +0100
From:   Paolo Abeni <pabeni@...hat.com>
To:     Christian Marangi <ansuelsmth@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [net-next PATCH v2 08/12] net: phy: at803x: move specific
 at8031 WOL bits to dedicated function

On Fri, 2023-12-01 at 01:14 +0100, Christian Marangi wrote:
> Move specific at8031 WOL enable/disable to dedicated function to make
> at803x_set_wol more generic.
> 
> This is needed in preparation for PHY driver split as qca8081 share the
> same function to toggle WOL settings.
> 
> In this new implementation WOL module in at8031 is enabled after the
> generic interrupt is setup. This should not cause any problem as the
> WOL_INT has a separate implementation and only relay on MAC bits.
> 
> Signed-off-by: Christian Marangi <ansuelsmth@...il.com>
> ---
>  drivers/net/phy/at803x.c | 42 ++++++++++++++++++++++++----------------
>  1 file changed, 25 insertions(+), 17 deletions(-)
> 
> diff --git a/drivers/net/phy/at803x.c b/drivers/net/phy/at803x.c
> index 02ac71f98466..2de7a59c0faa 100644
> --- a/drivers/net/phy/at803x.c
> +++ b/drivers/net/phy/at803x.c
> @@ -466,27 +466,11 @@ static int at803x_set_wol(struct phy_device *phydev,
>  			phy_write_mmd(phydev, MDIO_MMD_PCS, offsets[i],
>  				      mac[(i * 2) + 1] | (mac[(i * 2)] << 8));
>  
> -		/* Enable WOL function for 1588 */
> -		if (phydev->drv->phy_id == ATH8031_PHY_ID) {
> -			ret = phy_modify_mmd(phydev, MDIO_MMD_PCS,
> -					     AT803X_PHY_MMD3_WOL_CTRL,
> -					     0, AT803X_WOL_EN);
> -			if (ret)
> -				return ret;
> -		}
>  		/* Enable WOL interrupt */
>  		ret = phy_modify(phydev, AT803X_INTR_ENABLE, 0, AT803X_INTR_ENABLE_WOL);
>  		if (ret)
>  			return ret;
>  	} else {
> -		/* Disable WoL function for 1588 */
> -		if (phydev->drv->phy_id == ATH8031_PHY_ID) {
> -			ret = phy_modify_mmd(phydev, MDIO_MMD_PCS,
> -					     AT803X_PHY_MMD3_WOL_CTRL,
> -					     AT803X_WOL_EN, 0);
> -			if (ret)
> -				return ret;
> -		}
>  		/* Disable WOL interrupt */
>  		ret = phy_modify(phydev, AT803X_INTR_ENABLE, AT803X_INTR_ENABLE_WOL, 0);
>  		if (ret)
> @@ -1611,6 +1595,30 @@ static int at8031_config_init(struct phy_device *phydev)
>  	return at803x_config_init(phydev);
>  }
>  
> +static int at8031_set_wol(struct phy_device *phydev,
> +			  struct ethtool_wolinfo *wol)
> +{
> +	int ret;
> +
> +	/* First setup MAC address and enable WOL interrupt */
> +	ret = at803x_set_wol(phydev, wol);
> +	if (ret)
> +		return ret;
> +
> +	if (wol->wolopts & WAKE_MAGIC)
> +		/* Enable WOL function for 1588 */
> +		ret = phy_modify_mmd(phydev, MDIO_MMD_PCS,
> +				     AT803X_PHY_MMD3_WOL_CTRL,
> +				     0, AT803X_WOL_EN);
> +	else
> +		/* Disable WoL function for 1588 */
> +		ret = phy_modify_mmd(phydev, MDIO_MMD_PCS,
> +				     AT803X_PHY_MMD3_WOL_CTRL,
> +				     AT803X_WOL_EN, 0);
> +
> +	return ret;

If I read correctly, the above changes the order of some WoL
initialization steps: now WOL_CTRL is touched after
AT803X_INTR_ENABLE_WOL. Is that correct?

Thanks,

Paolo