linux-kernel - Re: [PATCH v4 2/9] cpufreq: Auto-register the driver as a thermal cooling device if asked

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Date:   Mon, 28 Jan 2019 09:32:44 +0100
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     Amit Kucheria <amit.kucheria@...aro.org>,
        linux-kernel@...r.kernel.org
Cc:     linux-arm-msm@...r.kernel.org, viresh.kumar@...aro.org,
        edubezval@...il.com, swboyd@...omium.org, dianders@...omium.org,
        mka@...omium.org, "Rafael J. Wysocki" <rjw@...ysocki.net>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        Tao Wang <kevin.wangtao@...ilicon.com>,
        Sudeep Holla <sudeep.holla@....com>, linux-pm@...r.kernel.org
Subject: Re: [PATCH v4 2/9] cpufreq: Auto-register the driver as a thermal
 cooling device if asked

On 28/01/2019 07:41, Amit Kucheria wrote:
> All cpufreq drivers do similar things to register as a cooling device.
> Provide a cpufreq driver flag so drivers can just ask the cpufreq core
> to register the cooling device on their behalf. This allows us to get
> rid of duplicated code in the drivers.
> 
> In order to allow this, we add a struct thermal_cooling_device pointer
> to struct cpufreq_policy so that drivers don't need to store it in a
> private data structure.
> 
> Suggested-by: Stephen Boyd <swboyd@...omium.org>
> Suggested-by: Viresh Kumar <viresh.kumar@...aro.org>
> Signed-off-by: Amit Kucheria <amit.kucheria@...aro.org>
> Reviewed-by: Matthias Kaehlcke <mka@...omium.org>
> Tested-by: Matthias Kaehlcke <mka@...omium.org>
> ---

[ ... ]

> +/*
> + * Set by drivers that want the core to automatically register the cpufreq
> + * driver as a thermal cooling device.
> + */
> +#define CPUFREQ_AUTO_REGISTER_COOLING_DEV	BIT(7)
> +

Isn't the CPUFREQ_IS_COOLING_DEV more appropriate? We define a property
of the cpufreq driver and the resulting action is to auto-register, no?



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