Commit Graph

19 Commits

Author SHA1 Message Date
Shawn Guo 95ceafd463 cpufreq: Add a generic cpufreq-cpu0 driver
It adds a generic cpufreq driver for CPU0 frequency management based on
clk, regulator, OPP and device tree support.  It can support both
uniprocessor (UP) and those symmetric multiprocessor (SMP) systems which
share clock and voltage across all CPUs.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Tested-by: AnilKumar Ch <anilkumar@ti.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
2012-09-09 22:06:34 +02:00
Matthew Garrett e1f0b8e9b0 cpufreq: Remove support for hardware P-state chips from powernow-k8
These chips are now supported by acpi-cpufreq, so we can delete all the
code handling them.

Andre: Tighten the deprecation warning message. Trigger load of
acpi-cpufreq and let the load of the module finally fail.
This avoids the problem of users ending up without any cpufreq support
after the transition.

Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Andre Przywara <andre.przywara@amd.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
2012-09-09 22:05:30 +02:00
Linus Torvalds cf821923ba Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq
Pull cpufreq updates for 3.4 from Dave Jones: new drivers and some fixes.

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq:
  provide disable_cpufreq() function to disable the API.
  EXYNOS5250: Add support cpufreq for EXYNOS5250
  EXYNOS4X12: Add support cpufreq for EXYNOS4X12
  [CPUFREQ] CPUfreq ondemand: update sampling rate without waiting for next sampling
  [CPUFREQ] Add S3C2416/S3C2450 cpufreq driver
  [CPUFREQ] Fix exposure of ARM_EXYNOS4210_CPUFREQ
  [CPUFREQ] EXYNOS4210: update the name of EXYNOS clock register
  [CPUFREQ] EXYNOS: Initialize locking_frequency with initial frequency
  [CPUFREQ] s3c64xx: Fix mis-cherry pick of VDDINT

Fix up trivial conflicts in Kconfig and Makefile due to just changes
next to each other (OMAP2PLUS changes vs some new EXYNOS cpufreq
drivers).
2012-03-23 17:56:39 -07:00
Jaecheol Lee 562a6cbe1c EXYNOS5250: Add support cpufreq for EXYNOS5250
This patch adds support cpufreq for EXYNOS5250 SoC. Basically,
the exynos-cpufreq.c is used commonly and exynos5250-cpufreq.c
is used for EXYNOS5250(two Cortex-A15 cores) SoC.

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>
2012-03-14 14:39:50 -04:00
Jaecheol Lee a35c50510d EXYNOS4X12: Add support cpufreq for EXYNOS4X12
This patch adds support cpufreq for EXYNOS4X12 SoCs. Basically,
the exynos-cpufreq.c is used commonly and exynos4x12-cpufreq.c
is used for EXYNOS4212(two Cortex-A9 cores) and EXYNOS4412(four
Cortex-A9 cores) SoCs.

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>
2012-03-14 14:39:47 -04:00
Heiko Stübner 34ee550752 [CPUFREQ] Add S3C2416/S3C2450 cpufreq driver
The S3C2416/S3C2450 SoCs support two sources for the armclk.

The first source is the so called armdiv which divides the msysclk down
to provide necessary cpu rates. In this mode the core voltage must be
always at 1.3V. The frequency from the armdiv is not allowed to be
lower than the hclk frequency.

In the second mode the armclk can be sourced directly from the hclk in
the so called "dynamic voltags scaling" (dvs) mode. Here the armdiv
isn't used at all. Also in this mode the core voltage may be lowered.
Existing hardware and tests with it suggest 1.0V as sufficient.

When changing the clock source to the armdiv from the hclk, the SoC
shows stability issues if the new frequency is higher than the current
hclk frequency. Hence the driver always forces the armdiv to the hclk
frequency before the source change and lets the cpufreq issue another
set_target call for higher frequencies.

To mark the hclk frequency as lower as the corresponding armdiv
frequency it is set 1MHz below the real frequency. This lets the cpufreq
framework change between 133MHz based on hclk and 133MHz based on armdiv
at will.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Tested-by: Andrey Gusakov <dron0gus@gmail.com>
Signed-off-by: Dave Jones <davej@redhat.com>
2012-02-29 22:24:39 -05:00
Russell King b09db45c56 cpufreq: OMAP driver depends CPUfreq tables
The OMAP driver depends on CPUfreq table support for creating a table
of frequencies from the OPP layer.  Ensure that it's build to avoid
link-time errors.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
[khilman@ti.com: make user-selectable, but default y]
Signed-off-by: Kevin Hilman <khilman@ti.com>
2012-02-21 16:32:24 -08:00
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
Santosh Shilimkar 731e0cc639 cpufreq: OMAP: cleanup for multi-SoC support, move into drivers/cpufreq
Move OMAP cpufreq driver from arch/arm/mach-omap2 into
drivers/cpufreq, along with a few cleanups:

- generalize support for better handling of different SoCs in the OMAP
- use OPP layer instead of OMAP clock internals for frequency table init

Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
[khilman@ti.com: move to drivers]
Signed-off-by: Kevin Hilman <khilman@ti.com>
2011-11-08 11:42:16 -08:00
Linus Torvalds 184475029a Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (99 commits)
  drivers/virt: add missing linux/interrupt.h to fsl_hypervisor.c
  powerpc/85xx: fix mpic configuration in CAMP mode
  powerpc: Copy back TIF flags on return from softirq stack
  powerpc/64: Make server perfmon only built on ppc64 server devices
  powerpc/pseries: Fix hvc_vio.c build due to recent changes
  powerpc: Exporting boot_cpuid_phys
  powerpc: Add CFAR to oops output
  hvc_console: Add kdb support
  powerpc/pseries: Fix hvterm_raw_get_chars to accept < 16 chars, fixing xmon
  powerpc/irq: Quieten irq mapping printks
  powerpc: Enable lockup and hung task detectors in pseries and ppc64 defeconfigs
  powerpc: Add mpt2sas driver to pseries and ppc64 defconfig
  powerpc: Disable IRQs off tracer in ppc64 defconfig
  powerpc: Sync pseries and ppc64 defconfigs
  powerpc/pseries/hvconsole: Fix dropped console output
  hvc_console: Improve tty/console put_chars handling
  powerpc/kdump: Fix timeout in crash_kexec_wait_realmode
  powerpc/mm: Fix output of total_ram.
  powerpc/cpufreq: Add cpufreq driver for Momentum Maple boards
  powerpc: Correct annotations of pmu registration functions
  ...

Fix up trivial Kconfig/Makefile conflicts in arch/powerpc, drivers, and
drivers/cpufreq
2011-07-25 22:59:39 -07:00
Dmitry Eremin-Solenikov 5d8c665889 powerpc/cpufreq: Add cpufreq driver for Momentum Maple boards
Add simple cpufreq driver for Maple-based boards (ppc970fx evaluation
kit and others). Driver is based on a cpufreq driver for 64-bit powermac
boxes with all pmac-dependant features removed and simple cleanup
applied.

Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-07-19 15:13:04 +10:00
Kukjin Kim 15964d3885 [CPUFREQ] Move compile for S3C64XX cpufreq to /drivers/cpufreq
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Dave Jones <davej@redhat.com>
2011-07-13 18:29:53 -04:00
Dave Jones 069283c3ec [CPUFREQ] Remove some vi noise that escaped into the Makefile. 2011-07-13 18:29:53 -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
Mark Brown be2de99bea [CPUFREQ/S3C64xx] Move S3C64xx CPUfreq driver into drivers/cpufreq
This is a straight code motion patch, there are no changes to the driver
itself. The Kconfig is left untouched as the ARM CPUfreq Kconfig is all
in one big block in arm/Kconfig and should be moved en masse rather than
being done piecemeal.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Dave Jones <davej@redhat.com>
2011-07-13 18:29:51 -04:00
Linus Walleij f0e733f32e cpufreq: make DB8500 cpufreq driver compile
Concluding interface update and movement of the driver by making
the DB8500 cpufreq driver compile in the cpufreq subsystem.

Cc: Arnd Bergmann <arnd@arndb.de>
Acked-by: Dave Jones <davej@redhat.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2011-05-24 22:20:14 +02:00
Dave Jones bb0a56ecc4 [CPUFREQ] Move x86 drivers to drivers/cpufreq/
Signed-off-by: Dave Jones <davej@redhat.com>
2011-05-19 18:51:07 -04:00
Dave Jones b9170836d1 [CPUFREQ] Conservative cpufreq governer
A new cpufreq module, based on the ondemand one with my additional patches
just posted.  This one is more suitable for battery environments where its
probably more appealing to have the cpu freq gracefully increase and decrease
rather than flip between the min and max freq's.

N.B. Bruno Ducrot pointed out that the amd64's "do have unacceptable latency
between min and max freq transition, due to the step-by-step requirements
(200MHz IIRC)"; so AMD64 users would probably benefit from this too.

Signed-off-by: Alexander Clouter <alex-kernel@digriz.org.uk>
Signed-off-by: Dave Jones <davej@redhat.com>
2005-05-31 19:03:47 -07:00
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00