linux-kernel - Re: [PATCH v5 4/7] cpufreq:exynos:Extend Exynos cpufreq driver to support boost framework

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Date:	Tue, 16 Jul 2013 12:58:48 +0200
From:	Lukasz Majewski <l.majewski@...sung.com>
To:	Viresh Kumar <viresh.kumar@...aro.org>
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 4/7] cpufreq:exynos:Extend Exynos cpufreq driver to
 support boost framework

On Tue, 16 Jul 2013 15:18:57 +0530 Viresh Kumar viresh.kumar@...aro.org
wrote,
> On 4 July 2013 14:20, Lukasz Majewski <l.majewski@...sung.com> wrote:
> > The struct cpufreq_driver has been extended to embrace the
> > information related to boost support.
> >
> > When "boost_mode" device tree attribute is defined for a platform,
> > the boost_supported flag is set. Moreover boost related attributes
> > were exported.
> >
> > Signed-off-by: Lukasz Majewski <l.majewski@...sung.com>
> > Signed-off-by: Myungjoo Ham <myungjoo.ham@...sung.com>
> 
> Don't we need to mark any frequencies in the freq table with BOOST?
> How?

The (trivial) patch is already prepared to enable BOOST at cpufreq for
Exynos4412. I will post it for v6. Sorry for not posting it earlier.

The whole patch is as follow:

static struct clk *cpu_clk;
static struct clk *mout_core;
static struct clk *sclk_mpll;
static struct clk *mout_apll;
 
static unsigned int exynos4x12_volt_table[] = {
	1350000, 1287500, 1250000, 1187500, 1137500, 1087500, 1037500,
 	1000000,  987500,  975000,  950000,  925000,  900000,  900000
};
 
 static struct cpufreq_frequency_table exynos4x12_freq_table[] = {
-	{L0, CPUFREQ_ENTRY_INVALID},
+	{CPUFREQ_BOOST_FREQ, 1500 * 1000},
 	{L1, 1400 * 1000},
 	{L2, 1300 * 1000},
 	{L3, 1200 * 1000},
 	{L4, 1100 * 1000},
 	{L5, 1000 * 1000},
 	{L6,  900 * 1000},
 	{L7,  800 * 1000},
 	{L8,  700 * 1000},
 	{L9,  600 * 1000},
 	{L10, 500 * 1000},
 	{L11, 400 * 1000},
 	{L12, 300 * 1000},



-- 
Best regards,

Lukasz Majewski

Samsung R&D Institute Poland (SRPOL) | Linux Platform Group
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