linux-kernel - Re: [PATCH v11 7/7] thermal:exynos:boost: Automatic enable/disable of BOOST feature (at Exynos4412)

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Message-ID: <52B307CC.2020704@ti.com>
Date:	Thu, 19 Dec 2013 10:50:52 -0400
From:	Eduardo Valentin <eduardo.valentin@...com>
To:	Lukasz Majewski <l.majewski@...sung.com>
CC:	Viresh Kumar <viresh.kumar@...aro.org>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	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>,
	Lukasz Majewski <l.majewski@...ess.pl>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	Myungjoo Ham <myungjoo.ham@...sung.com>,
	<durgadoss.r@...el.com>, <linux-samsung-soc@...r.kernel.org>
Subject: Re: [PATCH v11 7/7] thermal:exynos:boost: Automatic enable/disable
 of BOOST feature (at Exynos4412)

On 13-12-2013 12:38, Lukasz Majewski wrote:
> This patch provides auto disable/enable operation for boost. It uses already
> present thermal infrastructure to provide boost hysteresis.
> The TMU data has been modified to work properly with or without boost.
> 
> Signed-off-by: Lukasz Majewski <l.majewski@...sung.com>
> Signed-off-by: Myungjoo Ham <myungjoo.ham@...sung.com>

Acked-by: Eduardo Valentin <eduardo.valentin@...com>

Looks better to me now. You might consider refactoring this driver to be
frequency independent, if possible. But that is a different subject
other than this patch.

> 
> ---
> Changes for v11:
>     - Use only one thermal data set
>     - Adjust Exynos4412 thermal data to work with or without BOOST
> 
> Changes for v10:
>     - Remove boost related code from thermal_core.c
>     - Use already present thermal infrastructure to provide thermal hysteresis
>     - Introduce special set of TMU data for BOOST
> 
> Changes for v9:
>     - None
> 
> Changes for v8:
>     - Move cpufreq_boost_* stub functions definition (needed when cpufreq
>       is not compiled in) to cpufreq.h at cpufreq core support commit
> 
> Changes for v7:
>     - None
> 
> Changes for v6:
>     - Disable boost only when supported and enabled
>     - Protect boost related thermal_zone_device struct fields with mutex
>     - Evaluate temperature trend during boost enable decision
>     - Create separate methods to handle boost enable/disable
>       (thermal_boost_{enable|disable}) operations
>     - Boost is disabled at any trip point passage (not only the non critical one)
>     - Add stub definitions for cpufreq boost functions used when
>       CONFIG_CPU_FREQ is NOT defined.
> 
> Changes for v5:
>     - Move boost disable code from cpu_cooling.c to thermal_core.c
>       (to handle_non_critical_trips)
>     - Extent struct thermal_zone_device by adding overheated bool flag
>     - Implement auto enable of boost after device cools down
>     - Introduce boost_polling flag, which indicates if thermal uses it's predefined
>       pool delay or has woken up thermal workqueue only to wait until device
>       cools down.
> 
> Changes for v4:
>     - New patch
> 
>  drivers/thermal/samsung/exynos_tmu_data.c |   12 ++++++------
>  1 file changed, 6 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/thermal/samsung/exynos_tmu_data.c b/drivers/thermal/samsung/exynos_tmu_data.c
> index 073c292..476b768 100644
> --- a/drivers/thermal/samsung/exynos_tmu_data.c
> +++ b/drivers/thermal/samsung/exynos_tmu_data.c
> @@ -131,8 +131,8 @@ static const struct exynos_tmu_registers exynos4412_tmu_registers = {
>  
>  #define EXYNOS4412_TMU_DATA \
>  	.threshold_falling = 10, \
> -	.trigger_levels[0] = 85, \
> -	.trigger_levels[1] = 103, \
> +	.trigger_levels[0] = 70, \
> +	.trigger_levels[1] = 95, \
>  	.trigger_levels[2] = 110, \
>  	.trigger_levels[3] = 120, \
>  	.trigger_enable[0] = true, \
> @@ -155,12 +155,12 @@ static const struct exynos_tmu_registers exynos4412_tmu_registers = {
>  	.second_point_trim = 85, \
>  	.default_temp_offset = 50, \
>  	.freq_tab[0] = { \
> -		.freq_clip_max = 800 * 1000, \
> -		.temp_level = 85, \
> +		.freq_clip_max = 1400 * 1000, \
> +		.temp_level = 70, \
>  	}, \
>  	.freq_tab[1] = { \
> -		.freq_clip_max = 200 * 1000, \
> -		.temp_level = 103, \
> +		.freq_clip_max = 400 * 1000, \
> +		.temp_level = 95, \
>  	}, \
>  	.freq_tab_count = 2, \
>  	.registers = &exynos4412_tmu_registers, \
> 


-- 
You have got to be excited about what you are doing. (L. Lamport)

Eduardo Valentin


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