linux-kernel - Re: [PATCH RFC] PM/Devfreq: Add Exynos5-bus devfreq driver for Exynos5250.

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Date:	Wed, 5 Dec 2012 08:35:00 +0530
From:	Abhilash Kesavan <kesavan.abhilash@...il.com>
To:	jhbird.choi@...sung.com, myungjoo.ham@...sung.com,
	Kukjin Kim <kgene.kim@...sung.com>
Cc:	kyungmin.park@...sung.com, rjw@...k.pl,
	linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org
Subject: Re: [PATCH RFC] PM/Devfreq: Add Exynos5-bus devfreq driver for Exynos5250.

Cc'ing missed out recipients

---------- Forwarded message ----------
From: Abhilash Kesavan <kesavan.abhilash@...il.com>
Date: Tue, Dec 4, 2012 at 9:48 PM
Subject: Re: [PATCH RFC] PM/Devfreq: Add Exynos5-bus devfreq driver
for Exynos5250.
To: linux-pm@...r.kernel.org


Jonghwan Choi <jhbird.choi <at> samsung.com> writes:

>
>
> Hi Abhilash Kesavan.
Hi,
>
> I compiled in 3.7-rc8
> I got a compile error & warning.
>
> Compile error.
>
> CC      drivers/devfreq/exynos5_ppmu.o
> drivers/devfreq/exynos5_ppmu.c:56:14: error: 'S5P_VA_PPMU_DDR_C' undeclared
> here (not in a function)
> drivers/devfreq/exynos5_ppmu.c:59:14: error: 'S5P_VA_PPMU_DDR_R1' undeclared
> here (not in a function)
> drivers/devfreq/exynos5_ppmu.c:62:13: error: 'S5P_VA_PPMU_DDR_L' undeclared
> here (not in a function)
> drivers/devfreq/exynos5_ppmu.c:65:13: error: 'S5P_VA_PPMU_RIGHT' undeclared
> here (not in a function)
> drivers/devfreq/exynos5_ppmu.c:68:14: error: 'S5P_VA_PPMU_CPU' undeclared
> here (not in a function)
> make[2]: *** [drivers/devfreq/exynos5_ppmu.o] Error 1
I have submitted only the driver changes. As mentioned in the commit message I
will post the arch side changes after the drivers gets a complete review.
However, if you want to test the driver I will post it tommorrow.

[...]
> drivers/devfreq/exynos5_bus.c: In function 'exynos5_busfreq_int_probe':
> drivers/devfreq/exynos5_bus.c:388:9: warning: passing argument 3 of
> 'devfreq_add_device' from incompatible pointer type [enabled by default]
> include/linux/devfreq.h:170:24: note: expected 'struct devfreq_governor
> const *' but argument is of type 'char *'
[...]
> Need change?
These changes are based on
git://git.kernel.org/pub/scm/linux/kernel/git/mzx/devfreq.git : for-rafael
devfreq_add_device prototype has recently changed and that might be the cause of
the compilation error. Can you please try on this tree.

> How to change the INT clock? I think you have to change
> arch/arm/mach-exynos/clock-exynos5250.c
> (If you want to control via clock framework.)
[...]
> exynos5_int_clk.ops = &exynos5_clk_int_ops;
This is part of the arch side patch that has not been posted.

Regards,
Abhilash

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