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

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Date: Mon, 19 Feb 2024 11:16:29 +0100
From: Konrad Dybcio <konrad.dybcio@...aro.org>
To: Kathiravan Thirumoorthy <quic_kathirav@...cinc.com>,
 Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc: Andrew Lunn <andrew@...n.ch>, Bjorn Andersson <andersson@...nel.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 18.02.2024 05:29, Kathiravan Thirumoorthy wrote:
> 
> 
> On 2/17/2024 10:15 PM, Dmitry Baryshkov wrote:
>> 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.
> 
> 
> IPQ53XX SoC doesn't support the PM(suspend / resume) functionality, so that, can I enable these clocks in NSSCC driver probe itself?

Surely the platform can s2idle..

Konrad