Re: [PATCH net-next v1 1/2] net: phy: realtek: add support for RTL8261

[Aleksander Jan Bajkowski]

Hi Javen,

On 28/05/2026 09:52, javen wrote:
> From: Javen Xu <javen_xu@xxxxxxxxxxxxxx>
>
> This patch adds support for Realtek phy chip RTL8261. Its PHY id is
> 0x001cc898 and 0x001cc899.
>
> Signed-off-by: Javen Xu <javen_xu@xxxxxxxxxxxxxx>
> ---
>   drivers/net/phy/realtek/realtek_main.c | 315 +++++++++++++++++++++++++
>   1 file changed, 315 insertions(+)
>
> diff --git a/drivers/net/phy/realtek/realtek_main.c b/drivers/net/phy/realtek/realtek_main.c
> index 27268811f564..fe743fd0421b 100644
> --- a/drivers/net/phy/realtek/realtek_main.c
> +++ b/drivers/net/phy/realtek/realtek_main.c
> +static int rtl8261x_config_aneg(struct phy_device *phydev)
> +{
> +	u16 adv_1g = 0;
> +	int ret;
> +
> +	if (phydev->autoneg == AUTONEG_DISABLE)
> +		return genphy_c45_pma_setup_forced(phydev);
> +
> +	ret = rtl8261x_config_master_slave(phydev);
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = genphy_c45_config_aneg(phydev);
> +	if (ret < 0)
> +		return ret;
> +
> +	if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
> +			      phydev->advertising))
> +		adv_1g = BIT(9);

		adv_1g = ADVERTISE_1000FULL;

> +
> +	ret = phy_modify_mmd_changed(phydev, MDIO_MMD_VEND2,
> +				     RTL8261X_GBCR_REG,
> +				     BIT(9), adv_1g);

This is the C22 register mapped in VEND2 page. You can replace it with:

	ret = phy_modify_mmd_changed(phydev, MDIO_MMD_VEND2,
				     RTL822X_VND2_C22_REG(MII_CTRL1000 ),
				     ADVERTISE_1000FULL, adv_1g);


Best regards,
Aleksander