linux-kernel - Re: RFC: Advice on adding support for Qualcomm IPQ9574 SoC Ethernet

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Message-ID: <8178704d-b389-4521-a07b-707737aff234@quicinc.com>
Date: Wed, 9 Oct 2024 01:01:29 +0530
From: Kiran Kumar C.S.K <quic_kkumarcs@...cinc.com>
To: Andrew Lunn <andrew@...n.ch>
CC: Bjorn Andersson <quic_bjorande@...cinc.com>, <netdev@...r.kernel.org>,
        Andy Gross <agross@...nel.org>, Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        "David S. Miller"
	<davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski
	<kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, Rob Herring
	<robh+dt@...nel.org>,
        Krzysztof Kozlowski
	<krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Russell King <linux@...linux.org.uk>,
        Jacob Keller <jacob.e.keller@...el.com>,
        Bhupesh Sharma
	<bhupesh.sharma@...aro.org>,
        <linux-arm-msm@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <vsmuthu@....qualcomm.com>,
        <arastogi@....qualcomm.com>, <linchen@....qualcomm.com>,
        <john@...ozen.org>, Luo Jie
	<quic_luoj@...cinc.com>,
        Pavithra R <quic_pavir@...cinc.com>,
        "Suruchi
 Agarwal (QUIC)" <quic_suruchia@...cinc.com>,
        "Lei Wei (QUIC)"
	<quic_leiwei@...cinc.com>
Subject: Re: RFC: Advice on adding support for Qualcomm IPQ9574 SoC Ethernet



On 10/4/2024 8:20 PM, Andrew Lunn wrote:
>> The only compile-time dependency from PCS driver to NSS CC driver is
>> with the example section in PCS driver's dtbindings file. The PCS DTS
>> node example definitions include a header file exported by the NSS CC
>> driver, to access certain macros for referring to the MII Rx/Tx clocks.
> 
>> So, although there is no dependency in the driver code, a successful
>> dtbindings check will require the NSS CC driver to be available.
> 
> You are doing something wrong. A clock is just a phandle. The
> dtbindings check does not care where the phandle points to, just that
> it looks like a phandle. You can hard code the instance to 42 and all
> is good.
> 

Understand, we will specify it as a phandle and get rid of this dependency.

> And this is all just basic getting SoC stuff merged, nothing
> special. So why do you not know this? Have you not been subscribed to
> arm-soc for the last six months and watched other drivers get merged?
> I also really hope you have been on the netdev list for the last few
> months and have watched other pcs and ethernet drivers get merged.
>

We will pay closer attention to ongoing reviews going forward to avoid
these gaps. Thank you for all the inputs in this thread.

> 	Andrew