linux-kernel - Re: [PATCH v2 3/9] dt-bindings: clock: ipq5332: drop the few nss clocks definition

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Message-ID: <d26eae8d-4968-4ab0-bd9b-696d7b3865ec@linaro.org>
Date:   Wed, 22 Nov 2023 11:12:40 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Kathiravan Thirumoorthy <quic_kathirav@...cinc.com>,
        Andy Gross <agross@...nel.org>,
        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>
Cc:     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 v2 3/9] dt-bindings: clock: ipq5332: drop the few nss
 clocks definition

On 22/11/2023 11:08, Kathiravan Thirumoorthy wrote:
> 
> 
> On 11/21/2023 8:36 PM, Krzysztof Kozlowski wrote:
>> On 21/11/2023 15:30, Kathiravan Thirumoorthy wrote:
>>> In commit 0dd3f263c810 ("clk: qcom: ipq5332: enable few nssnoc clocks in
>>
>> Where is this commit coming from?
>>
>>> driver probe"), gcc_snoc_nssnoc_clk, gcc_snoc_nssnoc_1_clk,
>>> gcc_nssnoc_nsscc_clk are enabled in driver probe to keep it always-on.
>>
>> Implementation can change and for example bring back these clocks. Are
>> you going to change bindings? No, drop the patch.
>>
>> Bindings should be dropped only in a few rare cases like clocks not
>> available for OS or bugs.
> 
> Thanks Krzysztof. Will drop this patch in V3.
> 
> One more question to understand further. In IPQ SoCs there are bunch of 
> coresight / QDSS clocks but coresight framework doesn't handle all 
> clocks. Those clocks are enabled in bootloader stage itself. In such 
> case, should I drop the clocks from both binding and driver or only from 
> driver?

That's not really the reason to drop them at all. Neither from driver,
nor from bindings. You should not rely on bootloader handling your clocks

Best regards,
Krzysztof