linux-kernel - Re: [RFC PATCH 2/5] devfreq: event: Add exynos-ppmu devfreq evnet driver

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Message-ID: <1410511274.31130.7.camel@x220>
Date:	Fri, 12 Sep 2014 10:41:14 +0200
From:	Paul Bolle <pebolle@...cali.nl>
To:	Chanwoo Choi <cw00.choi@...sung.com>
Cc:	myungjoo.ham@...sung.com, linux-pm@...r.kernel.org,
	kyungmin.park@...sung.com, rafael.j.wysocki@...el.com,
	a.kesavan@...sung.com, kgene.kim@...sung.com,
	tomasz.figa@...il.com, b.zolnierkie@...sung.com, nm@...com,
	linux-kernel@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [RFC PATCH 2/5] devfreq: event: Add exynos-ppmu devfreq evnet
 driver

On Fri, 2014-09-05 at 13:30 +0900, Chanwoo Choi wrote:
> This patch add exynos-ppmu devfreq event driver to provider raw data about
> the utilization of each IP in Exynos SoC series.
> 
> Signed-off-by: Chanwoo Choi <cw00.choi@...sung.com>
> Acked-by: Kyungmin Park <kyungmin.park@...sung.com>
> ---
>  drivers/devfreq/Kconfig             |  10 +
>  drivers/devfreq/event/Makefile      |   1 +
>  drivers/devfreq/event/exynos-ppmu.c | 410 ++++++++++++++++++++++++++++++++++++
>  3 files changed, 421 insertions(+)
>  create mode 100644 drivers/devfreq/event/exynos-ppmu.c
> 
> diff --git a/drivers/devfreq/Kconfig b/drivers/devfreq/Kconfig
> index ef839e7..4fbbcea 100644
> --- a/drivers/devfreq/Kconfig
> +++ b/drivers/devfreq/Kconfig
> @@ -90,4 +90,14 @@ config ARM_EXYNOS5_BUS_DEVFREQ
>  
>  comment "DEVFREQ Event Drivers"
>  
> +config DEVFREQ_EVENT_EXYNOS_PPMU
> +	bool "EXYNOS PPMU (Performance Profiling Monitoring Unit) DEVFREQ event Driver"
> +	depends on ARCH_EXYNOS
> +	select ARCH_HAS_OPP

This select statement can be dropped: see commit 78c5e0bb145d ("PM /
OPP: Remove ARCH_HAS_OPP").

By the way: there's a typo in the commit summary ("evnet").

> +	select PM_OPP
> +	help
> +	 This add the DEVFREQ event driver for Exynos SoC. It provides PPMU
> +	 (Performance Profiling Monitoring Unit) counters to estimate the
> +	 utilization of each module.
> +
>  endif # PM_DEVFREQ


Paul Bolle

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