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

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Date: Thu, 25 Jan 2024 21:05:34 +0100
From: Andrew Lunn <andrew@...n.ch>
To: Kathiravan Thirumoorthy <quic_kathirav@...cinc.com>
Cc: 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 Mon, Jan 22, 2024 at 11:26:58AM +0530, Kathiravan Thirumoorthy wrote:
> gcc_snoc_nssnoc_clk, gcc_snoc_nssnoc_1_clk, gcc_nssnoc_nsscc_clk are
> enabled by default and it's RCG is properly configured by bootloader.

Which bootloader? Mainline barebox?

> Some of the NSS clocks needs these clocks to be enabled. To avoid
> these clocks being disabled by clock framework, drop these entries
> from the clock table and enable it in the driver probe itself.

If they are critical clocks, i would expect a device to reference
them. The CCF only disabled unused clocks in late_initcall_sync(),
which means all drivers should of probed and taken a reference on any
clocks they require.

Please correctly describe the clock tree in device tree, not hide
clocks because your DT description is not complete.

    Andrew

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