netdev - Re: [PATCH v3 07/13] net: phy: add qca8081 get

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Date:   Wed, 20 Oct 2021 14:39:57 +0800
From:   Jie Luo <quic_luoj@...cinc.com>
To:     Andrew Lunn <andrew@...n.ch>, Luo Jie <luoj@...eaurora.org>
Cc:     hkallweit1@...il.com, linux@...linux.org.uk, davem@...emloft.net,
        kuba@...nel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, sricharan@...eaurora.org
Subject: Re: [PATCH v3 07/13] net: phy: add qca8081 get_features


On 10/19/2021 5:44 AM, Andrew Lunn wrote:
> On Mon, Oct 18, 2021 at 11:33:27AM +0800, Luo Jie wrote:
>> Reuse the at803x phy driver get_features excepting
>> adding 2500M capability.
>>
>> Signed-off-by: Luo Jie<luoj@...eaurora.org>
>> ---
>>   drivers/net/phy/at803x.c | 10 ++++++++++
>>   1 file changed, 10 insertions(+)
>>
>> diff --git a/drivers/net/phy/at803x.c b/drivers/net/phy/at803x.c
>> index 42d3f8ccca94..0c22ef735230 100644
>> --- a/drivers/net/phy/at803x.c
>> +++ b/drivers/net/phy/at803x.c
>> @@ -719,6 +719,15 @@ static int at803x_get_features(struct phy_device *phydev)
>>   	if (err)
>>   		return err;
>>   
>> +	if (phydev->drv->phy_id == QCA8081_PHY_ID) {
>> +		err = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_PMA_NG_EXTABLE);
>> +		if (err < 0)
>> +			return err;
>> +
>> +		linkmode_mod_bit(ETHTOOL_LINK_MODE_2500baseT_Full_BIT, phydev->supported,
>> +				err & MDIO_PMA_NG_EXTABLE_2_5GBT);
>> +	}
> genphy_c45_pma_read_abilities()?
>
> 	Andrew

Hi Andrew,

Thanks for this comment, if we use genphy_c45_pma_read_abilities here, 
the ETHTOOL_LINK_MODE_Autoneg_BIT

will be lost, since MDIO_MMD_AN.MDIO_STAT1 does not have bit 
MDIO_AN_STAT1_ABLE.