linux-kernel - Re: [PATCH 5/7] ARM: dts: qcom: msm8226: Add CPU frequency scaling support

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Message-ID: <2dr3dyqu3epnrdpot3iwatkwq4uxgcmkoh7mzru2pet6xllarr@izq6mmyquffk>
Date: Thu, 20 Jun 2024 23:54:37 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Luca Weiss <luca@...aweiss.eu>
Cc: ~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.org, 
	Jassi Brar <jassisinghbrar@...il.com>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	Bjorn Andersson <andersson@...nel.org>, Michael Turquette <mturquette@...libre.com>, 
	Stephen Boyd <sboyd@...nel.org>, Konrad Dybcio <konrad.dybcio@...aro.org>, 
	linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org, devicetree@...r.kernel.org, 
	linux-clk@...r.kernel.org
Subject: Re: [PATCH 5/7] ARM: dts: qcom: msm8226: Add CPU frequency scaling
 support

On Wed, Jun 19, 2024 at 11:02:49PM GMT, Luca Weiss wrote:
> Add a node for the a7pll with its frequencies. With this we can use the
> apcs-kpss-global driver for the apcs node and use the apcs to scale the
> CPU frequency according to the opp-table.
> 
> At the same time unfortunately we need to provide the gcc node xo_board
> instead of the XO via rpmcc since otherwise we'll have a circular
> dependency between apcs, gcc and the rpm.

But it should be fine, isn't it? Clock controllers can handle orphaned
clocks.

The xo_board is really a hack and should eventually be removed.

> 
> Signed-off-by: Luca Weiss <luca@...aweiss.eu>
> ---

-- 
With best wishes
Dmitry