linux-kernel - Re: [PATCH 2/2] cpufreq: scpi: remove arm_big

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Date:   Wed, 10 Jan 2018 20:16:31 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Sudeep Holla <sudeep.holla@....com>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Jeremy Linton <jeremy.linton@....com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>
Subject: Re: [PATCH 2/2] cpufreq: scpi: remove arm_big_little dependency

On 09-01-18, 16:49, Sudeep Holla wrote:
> The dependency on physical_package_id from the topology to get the
> cluster identifier is wrong. The concept of cluster used in ARM topology
> is unfortunately not well defined in the architecture, we should avoid
> using it. Further the frequency domain need not be mapped to so called
> "clusters" one to one.
> 
> SCPI already provides means to obtain the frequency domain id from the
> device tree. In order to support some new topologies(e.g. DSU which
> contains 2 frequency domains within the physical cluster), pseudo
> clusters are created to make this driver work which is wrong again.
> 
> In order to solve those issues and also remove dependency of topological
> physical id for frequency domain, this patch removes the arm_big_little
> dependency from scpi driver.
> 
> Cc: "Rafael J. Wysocki" <rjw@...ysocki.net>
> Cc: Viresh Kumar <viresh.kumar@...aro.org>
> Signed-off-by: Sudeep Holla <sudeep.holla@....com>
> ---
>  drivers/cpufreq/scpi-cpufreq.c | 193 +++++++++++++++++++++++++++++++++++++----
>  1 file changed, 178 insertions(+), 15 deletions(-)

Acked-by: Viresh Kumar <viresh.kumar@...aro.org>

-- 
viresh