linux-kernel - Re: [PATCH 7/9] net: mdio: ipq4019: program phy address when "fixup" defined

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Message-ID: <272ce8f7-9c57-4d5f-a609-52c098b63227@quicinc.com>
Date:   Thu, 16 Nov 2023 19:17:05 +0800
From:   Jie Luo <quic_luoj@...cinc.com>
To:     Andrew Lunn <andrew@...n.ch>
CC:     <agross@...nel.org>, <andersson@...nel.org>,
        <konrad.dybcio@...aro.org>, <davem@...emloft.net>,
        <edumazet@...gle.com>, <kuba@...nel.org>, <pabeni@...hat.com>,
        <robh+dt@...nel.org>, <krzysztof.kozlowski+dt@...aro.org>,
        <conor+dt@...nel.org>, <hkallweit1@...il.com>,
        <linux@...linux.org.uk>, <robert.marko@...tura.hr>,
        <linux-arm-msm@...r.kernel.org>, <netdev@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <quic_srichara@...cinc.com>
Subject: Re: [PATCH 7/9] net: mdio: ipq4019: program phy address when "fixup"
 defined



On 11/16/2023 12:17 AM, Andrew Lunn wrote:
> On Wed, Nov 15, 2023 at 11:25:13AM +0800, Luo Jie wrote:
>> The PHY/PCS MDIO address can be programed when the property
>> "fixup" of phy node is defined.
>>
>> The qca8084 PHY/PCS address configuration register is accessed
>> by MDIO bus with the special MDIO sequence.
>>
>> The PHY address configuration register of IPQ5018 is accessed
>> by local bus.
>>
>> Add the function ipq_mdio_preinit, which should be called before
>> the PHY device scanned and registered.
> 
> I'm not convinced this belongs in the MDIO bus driver. Its really a
> PHY property, so i think all this should be in the PHY driver. If you
> specify the PHY ID in the compatible string, you can get the driver
> loaded and the probe function called. You can then set the PHY
> address.
> 
> 	Andrew

I will try to do the initialization configs in the PHY probe function,
Thanks Andrew for the suggestions.