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9 commits

Author SHA1 Message Date
Jaecheol Lee
6c523c614c [CPUFREQ] EXYNOS: Removed useless headers and codes
This patch removes no referencing header files and cleaned up
useless code.

Signed-off-by: Jaecheol Lee <jc.lee@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Dave Jones <davej@redhat.com>
2012-01-08 23:52:40 -05:00
Jaecheol Lee
a125a17fa6 [CPUFREQ] EXYNOS: Make EXYNOS common cpufreq driver
To support various EXYNOS series SoCs commonly,
added exynos common structure.
exynos-cpufreq.c => EXYNOS series common cpufreq driver
exynos4210-cpufreq.c => EXYNOS4210 support cpufreq driver

Signed-off-by: Jaecheol Lee <jc.lee@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Dave Jones <davej@redhat.com>
2012-01-08 23:52:40 -05:00
Jaecheol Lee
27f805dcb0 [CPUFREQ] EXYNOS4210: cpufreq code is changed for stable working
This patch is modify code for stable working
1. Remove unused register access code
2. Change sequence for frequency changing

Signed-off-by: Jaecheol Lee <jc.lee@samsung.com>
Signed-off-by: Jonghwan Choi <jhbird.choi@samsung.com>
Signed-off-by: Jongpill Lee <boyko.lee@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Dave Jones <davej@redhat.com>
2011-12-09 10:38:02 -05:00
Jaecheol Lee
ba9d780311 [CPUFREQ] EXYNOS4210: Update frequency table for cpu divider
This patch is changes frequency table for cpu divider for stable frequency.

Signed-off-by: Jaecheol Lee <jc.lee@samsung.com>
Signed-off-by: Jongpill Lee <boyko.lee@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Dave Jones <davej@redhat.com>
2011-12-09 10:38:02 -05:00
Jaecheol Lee
c8c430e2f6 [CPUFREQ] EXYNOS4210: Remove code about bus on cpufreq
This patch removes code for bus on cpufreq because the code
for bus frequency changing moves to busfreq driver.
So code about bus on cpufreq is not necessary.

Signed-off-by: Jaecheol Lee <jc.lee@samsung.com>
Signed-off-by: Jongpill Lee <boyko.lee@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Dave Jones <davej@redhat.com>
2011-12-09 10:38:02 -05:00
MyungJoo Ham
0073f538c1 [CPUFREQ] ARM Exynos4210 PM/Suspend compatibility with different bootloaders
We have various bootloaders for Exynos4210 machines. Some of they
set the ARM core frequency at boot time even when the boot is a resume
from suspend-to-RAM. Such changes may create inconsistency in the
data of CPUFREQ driver and have incurred hang issues with suspend-to-RAM.

This patch enables to save and restore CPU frequencies with pm-notifier and
sets the frequency at the initial (boot-time) value so that there wouldn't
be any inconsistency between bootloader and kernel. This patch does not
use CPUFREQ's suspend/resume callbacks because they are syscore-ops, which
do not allow to use mutex that is being used by regulators that are used by
the target function.

This also prevents any CPUFREQ transitions during suspend-resume context,
which could be dangerous at noirq-context along with regulator framework.

Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Dave Jones <davej@redhat.com>
2011-10-26 17:19:46 -04:00
Donggeun Kim
5beae3b9b6 [CPUFREQ] exynos4210: Show list of available frequencies
This patch enables 'scaling_available_frequencies' attribute
showing list of available frequencies.

Signed-off-by: Donggeun Kim <dg77.kim@samsung.com>
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: KyungMin Park <kyungmin.park@samsung.com>
Signed-off-by: Dave Jones <davej@redhat.com>
2011-10-26 17:19:45 -04:00
Axel Lin
2f0d6f20ec [CPUFREQ] exynos4210: make needlessly global symbols static
The following symbols are needlessly defined global:
  exynos4_verify_speed
  exynos4_getspeed
  exynos4_set_clkdiv

Make them static.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Dave Jones <davej@redhat.com>
2011-07-13 18:30:00 -04:00
Kukjin Kim
f7d770790f [CPUFREQ] Move ARM Samsung cpufreq drivers to drivers/cpufreq/
According to discussion of the ARM arch subsystem migration,
ARM cpufreq drivers move to drivers/cpufreq. So this patch
adds Kconfig.arm for ARM like x86 and adds Samsung S5PV210
and EXYNOS4210 cpufreq driver compile in there.
As a note, otherw will be moved.

Cc: Dave Jones <davej@redhat.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Dave Jones <davej@redhat.com>
2011-07-13 18:29:51 -04:00
Renamed from arch/arm/mach-exynos4/cpufreq.c (Browse further)