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Message-ID: <d518dbc1-41aa-46f9-b549-c95a33b06ee0@quicinc.com>
Date: Sun, 18 Feb 2024 09:59:03 +0530
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Subject: Re: [PATCH v4 2/8] clk: qcom: ipq5332: enable few nssnoc clocks in
 driver probe
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To: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
CC: Andrew Lunn <andrew@lunn.ch>, Bjorn Andersson <andersson@kernel.org>,
        Konrad Dybcio <konrad.dybcio@linaro.org>,
        Michael Turquette
	<mturquette@baylibre.com>,
        Stephen Boyd <sboyd@kernel.org>, Rob Herring
	<robh+dt@kernel.org>,
        Krzysztof Kozlowski
	<krzysztof.kozlowski+dt@linaro.org>,
        Conor Dooley <conor+dt@kernel.org>,
        Richard Cochran <richardcochran@gmail.com>,
        Catalin Marinas
	<catalin.marinas@arm.com>,
        Will Deacon <will@kernel.org>, <linux-arm-msm@vger.kernel.org>,
        <linux-clk@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        <devicetree@vger.kernel.org>, <netdev@vger.kernel.org>,
        <linux-arm-kernel@lists.infradead.org>
References: <20240122-ipq5332-nsscc-v4-0-19fa30019770@quicinc.com>
 <20240122-ipq5332-nsscc-v4-2-19fa30019770@quicinc.com>
 <7a69a68d-44c2-4589-b286-466d2f2a0809@lunn.ch>
 <11fda059-3d8d-4030-922a-8fef16349a65@quicinc.com>
 <17e2400e-6881-4e9e-90c2-9c4f77a0d41d@lunn.ch>
 <8c9ee34c-a97b-4acf-a093-9ac2afc28d0e@quicinc.com>
 <CAA8EJppe6aNf2WJ5BvaX8SPTbuaEwzRm74F8QKyFtbmnGQt=1w@mail.gmail.com>
 <74f585c2-d220-4324-96eb-1a945fef9608@quicinc.com>
 <CAA8EJppuNRB9fhjimg4SUR2PydX7-KLWSb9H-nC-oSMYVOME-Q@mail.gmail.com>
From: Kathiravan Thirumoorthy <quic_kathirav@quicinc.com>
In-Reply-To: <CAA8EJppuNRB9fhjimg4SUR2PydX7-KLWSb9H-nC-oSMYVOME-Q@mail.gmail.com>
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On 2/17/2024 10:15 PM, Dmitry Baryshkov wrote:
> On Sat, 17 Feb 2024 at 17:45, Kathiravan Thirumoorthy
> <quic_kathirav@quicinc.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.


IPQ53XX SoC doesn't support the PM(suspend / resume) functionality, so 
that, can I enable these clocks in NSSCC driver probe itself?


> 
>>
>>>
>>>>> 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>
> 
> 
>