linux-toradex.git/drivers/cpufreq, branch v3.7.6

cpufreq: Add module aliases for acpi-cpufreq

2013-01-28T04:49:02+00:00

commit efa17194581bdfca0986dabc178908bd7c21ba00 upstream.

The acpi core will call request_module("acpi-cpufreq") on subsystem init,
but this will fail if the module isn't available at that stage of boot.
Add some module aliases to ensure that udev can load the module on Intel
and AMD systems with the appropriate feature bits - I /think/ that this
will also work on VIA systems, but haven't verified that.

References: http://lkml.kernel.org/r/1448223.sdUJnNSRz4@vostro.rjw.lan
Signed-off-by: Matthew Garrett 
Tested-by: Leonid Isaev 
Acked-by: Borislav Petkov 
Signed-off-by: Rafael J. Wysocki 
Signed-off-by: Greg Kroah-Hartman

powernow-k8: Add a kconfig dependency on acpi-cpufreq

2013-01-28T04:49:02+00:00

commit 631e8ac18fd59722e7ceb15fceeef3f368c250f9 upstream.

Andreas reports in https://bugzilla.kernel.org/show_bug.cgi?id=51741
that with his Gentoo config, acpi-cpufreq wasn't enabled and
powernow-k8 couldn't handoff properly to acpi-cpufreq leading to
running without P-state support (i.e., cores are constantly in P0).

To alleaviate that, we need to make powernow-k8 depend on acpi-cpufreq
so that acpi-cpufreq is always present.

References: https://bugzilla.kernel.org/show_bug.cgi?id=51741
Reported-by: Andreas 
Signed-off-by: Borislav Petkov 
Signed-off-by: Rafael J. Wysocki 
Signed-off-by: Greg Kroah-Hartman

cpufreq / powernow-k8: Change maintainer's email address

2012-10-31T20:02:57+00:00

Change the Andreas' email address in drivers/cpufreq/powernow-k8.c.

Signed-off-by: Andreas Herrmann 
Signed-off-by: Rafael J. Wysocki

Fix memory leak in cpufreq stats.

2012-10-22T23:03:00+00:00

When system enters sleep, non-boot CPUs will be disabled.
Cpufreq stats sysfs is created when the CPU is up, but it is not
freed when the CPU is going down. This will cause memory leak.

Signed-off-by: xiaobing tu 
Signed-off-by: guifang tang 
Signed-off-by: Rafael J. Wysocki

cpufreq / powernow-k8: Remove usage of smp_processor_id() in preemptible code

2012-10-22T22:55:10+00:00

Commit 6889125b8b4e09c5e53e6ecab3433bed1ce198c9
(cpufreq/powernow-k8: workqueue user shouldn't migrate the kworker to another CPU)
causes powernow-k8 to trigger a preempt warning, e.g.:

  BUG: using smp_processor_id() in preemptible [00000000] code: cpufreq/3776
  caller is powernowk8_target+0x20/0x49
  Pid: 3776, comm: cpufreq Not tainted 3.6.0 #9
  Call Trace:
   [] debug_smp_processor_id+0xc7/0xe0
   [] powernowk8_target+0x20/0x49
   [] __cpufreq_driver_target+0x82/0x8a
   [] cpufreq_governor_performance+0x4e/0x54
   [] __cpufreq_governor+0x8c/0xc9
   [] __cpufreq_set_policy+0x1a9/0x21e
   [] store_scaling_governor+0x16f/0x19b
   [] ? cpufreq_update_policy+0x124/0x124
   [] ? _raw_spin_unlock_irqrestore+0x2c/0x49
   [] store+0x60/0x88
   [] sysfs_write_file+0xf4/0x130
   [] vfs_write+0xb5/0x151
   [] sys_write+0x4a/0x71
   [] system_call_fastpath+0x16/0x1b

Fix this by by always using work_on_cpu().

Signed-off-by: Andreas Herrmann 
Cc: stable@vger.kernel.org
Signed-off-by: Rafael J. Wysocki

cpufreq: OMAP: use get_cpu_device() instead of omap_device API

2012-10-08T21:58:56+00:00

OMAP PM core code has moved to using the existing, generic CPU devices
for attaching OPPs, so the CPUfreq driver can now use the generic
get_cpu_device() API instead of the OMAP-specific omap_device API.

This allows us to remove the last  include from this driver.

Cc: Paul Walmsley 
Acked-by: Rafael J. Wysocki 
Signed-off-by: Kevin Hilman

cpufreq: OMAP: fix clock usage to be SoC independent, remove plat/ includes

2012-10-08T21:58:39+00:00

OMAP core code now has SoC-independent clock alias for the scalable
CPU clock.  Using it means driver is SoC independent and will work for
AM3xxx SoCs as well as OMAP1/3/4.

While here, remove some unnecessary plat/ includes that are
interfering with multi-subarch ARM kernels.

Signed-off-by: Paul Walmsley 
[tony@atomide.com: updated already changed clock aliases]
Signed-off-by: Tony Lindgren 
[khilman@ti.com: minor shortlog/changelog updates]
Acked-by: Rafael J. Wysocki 
Signed-off-by: Kevin Hilman

cpufreq: OMAP: remove unused

2012-10-08T21:58:33+00:00

The  headers are going away, and this one is not used.  remove it.

Acked-by: Rafael J. Wysocki 
Signed-off-by: Kevin Hilman

cpufreq: OMAP: ensure valid clock rate before scaling

2012-10-08T21:57:34+00:00

Ensure the clock rate that will be used is a valid one before
attempting to scale the voltage.  Currently the driver assumes it has
a valid frequency from the OPP table, but boards using different
system oscillators might not have exact matches with the OPP table,
and result in a failing call to clk_set_rate().

This is particularily bad because the voltage may be scaled even
though the frequency is not.  This will obviously lead to some
unpredictable behavior, especially if the frequency is high and
the voltage is dropped.

Thanks to Joni Lapilainen for reporting crashes seen on 3430/n900.

Reported-by: Joni Lapilainen 
Acked-by: Rafael J. Wysocki 
Signed-off-by: Kevin Hilman

Merge tag 'pm-for-3.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

2012-10-03T01:32:35+00:00

Pull power management updates from Rafael J Wysocki:

 - Improved system suspend/resume and runtime PM handling for the SH
   TMU, CMT and MTU2 clock event devices (also used by ARM/shmobile).

 - Generic PM domains framework extensions related to cpuidle support
   and domain objects lookup using names.

 - ARM/shmobile power management updates including improved support for
   the SH7372's A4S power domain containing the CPU core.

 - cpufreq changes related to AMD CPUs support from Matthew Garrett,
   Andre Przywara and Borislav Petkov.

 - cpu0 cpufreq driver from Shawn Guo.

 - cpufreq governor fixes related to the relaxing of limit from Michal
   Pecio.

 - OMAP cpufreq updates from Axel Lin and Richard Zhao.

 - cpuidle ladder governor fixes related to the disabling of states from
   Carsten Emde and me.

 - Runtime PM core updates related to the interactions with the system
   suspend core from Alan Stern and Kevin Hilman.

 - Wakeup sources modification allowing more helper functions to be
   called from interrupt context from John Stultz and additional
   diagnostic code from Todd Poynor.

 - System suspend error code path fix from Feng Hong.

Fixed up conflicts in cpufreq/powernow-k8 that stemmed from the
workqueue fixes conflicting fairly badly with the removal of support for
hardware P-state chips.  The changes were independent but somewhat
intertwined.

* tag 'pm-for-3.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (76 commits)
  Revert "PM QoS: Use spinlock in the per-device PM QoS constraints code"
  PM / Runtime: let rpm_resume() succeed if RPM_ACTIVE, even when disabled, v2
  cpuidle: rename function name "__cpuidle_register_driver", v2
  cpufreq: OMAP: Check IS_ERR() instead of NULL for omap_device_get_by_hwmod_name
  cpuidle: remove some empty lines
  PM: Prevent runtime suspend during system resume
  PM QoS: Use spinlock in the per-device PM QoS constraints code
  PM / Sleep: use resume event when call dpm_resume_early
  cpuidle / ACPI : move cpuidle_device field out of the acpi_processor_power structure
  ACPI / processor: remove pointless variable initialization
  ACPI / processor: remove unused function parameter
  cpufreq: OMAP: remove loops_per_jiffy recalculate for smp
  sections: fix section conflicts in drivers/cpufreq
  cpufreq: conservative: update frequency when limits are relaxed
  cpufreq / ondemand: update frequency when limits are relaxed
  properly __init-annotate pm_sysrq_init()
  cpufreq: Add a generic cpufreq-cpu0 driver
  PM / OPP: Initialize OPP table from device tree
  ARM: add cpufreq transiton notifier to adjust loops_per_jiffy for smp
  cpufreq: Remove support for hardware P-state chips from powernow-k8
  ...