linux-kernel - Re: [PATCH v5 2/7] cpufreq: Add boost frequency support in core

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Message-ID: <CAKohpomfWKiRjznXeYsg32xAAWPTBQ4Gd0D_pftbA5=zMDiH4Q@mail.gmail.com>
Date:	Tue, 16 Jul 2013 15:11:54 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	Lukasz Majewski <l.majewski@...sung.com>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>, Zhang Rui <rui.zhang@...el.com>,
	Eduardo Valentin <eduardo.valentin@...com>,
	"cpufreq@...r.kernel.org" <cpufreq@...r.kernel.org>,
	Linux PM list <linux-pm@...r.kernel.org>,
	Jonghwa Lee <jonghwa3.lee@...sung.com>, l.majewski@...ess.pl,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Andre Przywara <andre.przywara@...aro.org>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Myungjoo Ham <myungjoo.ham@...sung.com>
Subject: Re: [PATCH v5 2/7] cpufreq: Add boost frequency support in core

On 4 July 2013 14:20, Lukasz Majewski <l.majewski@...sung.com> wrote:
> diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c

> +int cpufreq_boost_trigger_state(int state)
> +{
> +       unsigned long flags;
> +       int ret = 0;
> +
> +       if (boost_enabled != state) {
> +               write_lock_irqsave(&cpufreq_driver_lock, flags);
> +               boost_enabled = state;
> +
> +               ret = cpufreq_driver->enable_boost(state);
> +               if (ret)
> +                       boost_enabled = 0;
> +
> +               write_unlock_irqrestore(&cpufreq_driver_lock, flags);
> +
> +               if (ret)
> +                       pr_err("%s: BOOST cannot enable (%d)\n",

Who said we are enabling it?

> +                              __func__, ret);
> +       }
> +
> +       return ret;
> +}
> +
> +int cpufreq_boost_supported(void)
> +{
> +       if (cpufreq_driver)
> +               return cpufreq_driver->boost_supported;
> +
> +       return 0;
> +}
> +EXPORT_SYMBOL_GPL(cpufreq_boost_supported);
> +
> +int cpufreq_boost_enabled(void)
> +{
> +       return boost_enabled;
> +}
> +EXPORT_SYMBOL_GPL(cpufreq_boost_enabled);
> +
> +void cpufreq_set_boost_enabled(int state)

Maybe cpufreq_block_boost? As suggested by Rafael.

> +{
> +       boost_enabled = state;
> +}
> +EXPORT_SYMBOL_GPL(cpufreq_set_boost_enabled);
> +
> +/*********************************************************************
>   *               REGISTER / UNREGISTER CPUFREQ DRIVER                *
>   *********************************************************************/
>
> @@ -2001,6 +2094,22 @@ int cpufreq_register_driver(struct cpufreq_driver *driver_data)
>         cpufreq_driver = driver_data;
>         write_unlock_irqrestore(&cpufreq_driver_lock, flags);
>
> +       if (cpufreq_driver->boost_supported) {
> +               /*
> +                * Check if boost driver provides function to enable boost -
> +                * if not, use cpufreq_boost_enable_sw as default
> +                */
> +               if (!cpufreq_driver->enable_boost)
> +                       cpufreq_driver->enable_boost = &cpufreq_boost_enable_sw;

& is redundant.
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