linux-kernel - Re: [PATCH net-next v2 2/2] net: phy: Add driver for Motorcomm yt8821 2.5G ethernet phy

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Message-ID: <b9c42139-e9df-4ddd-865e-3d312236be00@lunn.ch>
Date: Sat, 17 Aug 2024 00:32:33 +0200
From: Andrew Lunn <andrew@...n.ch>
To: Frank Sae <Frank.Sae@...or-comm.com>
Cc: hkallweit1@...il.com, davem@...emloft.net, edumazet@...gle.com,
	kuba@...nel.org, pabeni@...hat.com, linux@...linux.org.uk,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	yuanlai.cui@...or-comm.com, hua.sun@...or-comm.com,
	xiaoyong.li@...or-comm.com, suting.hu@...or-comm.com,
	jie.han@...or-comm.com
Subject: Re: [PATCH net-next v2 2/2] net: phy: Add driver for Motorcomm
 yt8821 2.5G ethernet phy

> +/**
> + * yt8821_get_features - read mmd register to get 2.5G capability
> + * @phydev: target phy_device struct
> + *
> + * Returns: 0 or negative errno code
> + */
> +static int yt8821_get_features(struct phy_device *phydev)
> +{
> +	int val;
> +
> +	val = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_PMA_NG_EXTABLE);
> +	if (val < 0)
> +		return val;
> +
> +	linkmode_mod_bit(ETHTOOL_LINK_MODE_2500baseT_Full_BIT,
> +			 phydev->supported,
> +			 val & MDIO_PMA_NG_EXTABLE_2_5GBT);

genphy_c45_pma_read_ext_abilities() ?

> +static int yt8821_read_status(struct phy_device *phydev)
> +{
> +	int link;
> +	int ret;
> +	int val;
> +
> +	if (phydev->autoneg == AUTONEG_ENABLE) {
> +		int lpadv = phy_read_mmd(phydev,
> +					 MDIO_MMD_AN, MDIO_AN_10GBT_STAT);
> +
> +		if (lpadv < 0)
> +			return lpadv;
> +
> +		mii_10gbt_stat_mod_linkmode_lpa_t(phydev->lp_advertising,
> +						  lpadv);

genphy_c45_read_lpa() ?

	Andrew