linux-kernel - Re: [PATCH v9 6/6] arm64: dts: qcom: ipq9574: Add icc provider ability to gcc

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Date: Thu, 27 Jun 2024 00:00:35 +0200
From: Konrad Dybcio <konrad.dybcio@...aro.org>
To: Varadarajan Narayanan <quic_varada@...cinc.com>,
 Georgi Djakov <djakov@...nel.org>
Cc: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>, andersson@...nel.org,
 mturquette@...libre.com, sboyd@...nel.org, robh@...nel.org,
 krzk+dt@...nel.org, conor+dt@...nel.org, quic_anusha@...cinc.com,
 linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-pm@...r.kernel.org
Subject: Re: [PATCH v9 6/6] arm64: dts: qcom: ipq9574: Add icc provider
 ability to gcc

On 19.06.2024 9:36 AM, Varadarajan Narayanan wrote:

[...]


> Tested the patches with both gcc and nsscc providers having
> 'sync_state' set to icc_sync_state.
> 
> 	# dmesg | grep synced
> 	[    3.029820] qcom,gcc-ipq9574 1800000.clock-controller: interconnect provider is in synced state
> 	[    3.470106] qcom,nsscc-ipq9574 39b00000.clock-controller: interconnect provider is in synced state
> 
> I can see that icc_sync_state is getting called and clocks
> related to paths with zero bandwidth are getting disabled.
> 
> Will post the NSSCC patches to get the full picture.

Going back to the original question, does removing interconnects = from
things like PCIe now make them not work / crash the device, which would
indicate the NoC clocks were indeed gated?

Konrad