linux-kernel - Re: [PATCH 1/3] net: phy: at803x: support qca8081 1G chip type

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Message-ID: <b735b442-8818-c66e-5498-9faa2e4984f2@quicinc.com>
Date:   Fri, 30 Jun 2023 14:39:06 +0800
From:   Jie Luo <quic_luoj@...cinc.com>
To:     Andrew Lunn <andrew@...n.ch>
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>
Subject: Re: [PATCH 1/3] net: phy: at803x: support qca8081 1G chip type



On 6/29/2023 9:14 PM, Andrew Lunn wrote:
> On Thu, Jun 29, 2023 at 11:48:44AM +0800, Luo Jie wrote:
>> The qca8081 1G chip version does not support 2.5 capability, which
>> is distinguished from qca8081 2.5G chip according to the bit0 of
>> register mmd7.0x901d.
>>
>> The fast retrain and master slave seed configs are only needed when
>> the 2.5G capability is supported.
> 
> Does genphy_c45_pma_read_abilities() work on these devices?
> 
>       Andrew

Hi Andrew,
yes, genphy_c45_pma_read_abilities works on both normal qca8081 2.5G 
chip and qca8081 1G version chip, even the PHY ID is same, the only 
difference between qca8081 1G and 2.5G chip is the 2.5G capability 
removed on 1G version chip.