netdev - Re: [PATCH v4 2/8] clk: qcom: ipq5332: enable few nssnoc clocks in driver probe

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Message-ID: <CAA8EJppuNRB9fhjimg4SUR2PydX7-KLWSb9H-nC-oSMYVOME-Q@mail.gmail.com>
Date: Sat, 17 Feb 2024 18:45:40 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Kathiravan Thirumoorthy <quic_kathirav@...cinc.com>
Cc: Andrew Lunn <andrew@...n.ch>, Bjorn Andersson <andersson@...nel.org>, 
	Konrad Dybcio <konrad.dybcio@...aro.org>, Michael Turquette <mturquette@...libre.com>, 
	Stephen Boyd <sboyd@...nel.org>, Rob Herring <robh+dt@...nel.org>, 
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>, 
	Richard Cochran <richardcochran@...il.com>, Catalin Marinas <catalin.marinas@....com>, 
	Will Deacon <will@...nel.org>, linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org, 
	linux-kernel@...r.kernel.org, devicetree@...r.kernel.org, 
	netdev@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v4 2/8] clk: qcom: ipq5332: enable few nssnoc clocks in
 driver probe

On Sat, 17 Feb 2024 at 17:45, Kathiravan Thirumoorthy
<quic_kathirav@...cinc.com> wrote:
>
>
> <snip>
>
> >> Reason being, to access the NSSCC clocks, these GCC clocks
> >> (gcc_snoc_nssnoc_clk, gcc_snoc_nssnoc_1_clk, gcc_nssnoc_nsscc_clk)
> >> should be turned ON. But CCF disables these clocks as well due to the
> >> lack of consumer.
> >
> > This means that NSSCC is also a consumer of those clocks. Please fix
> > both DT and nsscc driver to handle NSSNOC clocks.
>
>
> Thanks Dmitry. I shall include these clocks in the NSSCC DT node and
> enable the same in the NSSCC driver probe.

Or use them through pm_clk. This might be better, as the system
doesn't need these clocks if NSSCC is suspended.

>
> >
> >>> Once you have actual drivers, this should solve itself, the drivers
> >>> will consume the clocks.
> >>
> >>
> >> Given that, NSSCC is being built as module, there is no issue in booting
> >> the kernel. But if you do insmod of the nsscc-ipq5332.ko, system will
> >> reset.
> >>
> >> Without the networking drivers, there is no need to install this module.
> >> And as you stated, once the drivers are available, there will be no issues.
> >>
> >> So can I explain the shortcomings of installing this module without the
> >> networking drivers in cover letter and drop this patch all together?
> >
> > No. Using allyesconfig or allmodconfig and installing the full modules
> > set should work.
> >
>
>
> Okay, Got it. Thanks for the information.
>
> <snip>



-- 
With best wishes
Dmitry