linux.git/drivers/cpufreq, branch v3.8-rc2 Linux kernel source tree Merge tag 'pm+acpi-for-3.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm 2012-12-11T20:45:35+00:00 Linus Torvalds torvalds@linux-foundation.org 2012-12-11T20:45:35+00:00 bad73c5aa069f1f14cc07ce7bbae8d463635560c Pull ACPI and power management updates from Rafael Wysocki: - Introduction of device PM QoS flags. - ACPI device power management update allowing subsystems other than PCI to use it more easily. - ACPI device enumeration rework allowing additional kinds of devices to be enumerated via ACPI. From Mika Westerberg, Adrian Hunter, Mathias Nyman, Andy Shevchenko, and Rafael J. Wysocki. - ACPICA update to version 20121018 from Bob Moore and Lv Zheng. - ACPI memory hotplug update from Wen Congyang and Yasuaki Ishimatsu. - Introduction of acpi_handle_<level>() messaging macros and ACPI-based CPU hot-remove support from Toshi Kani. - ACPI EC updates from Feng Tang. - cpufreq updates from Viresh Kumar, Fabio Baltieri and others. - cpuidle changes to quickly notice governor prediction failure from Youquan Song. - Support for using multiple cpuidle drivers at the same time and cpuidle cleanups from Daniel Lezcano. - devfreq updates from Nishanth Menon and others. - cpupower update from Thomas Renninger. - Fixes and small cleanups all over the place. * tag 'pm+acpi-for-3.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (196 commits) mmc: sdhci-acpi: enable runtime-pm for device HID INT33C6 ACPI: add Haswell LPSS devices to acpi_platform_device_ids list ACPI: add documentation about ACPI 5 enumeration pnpacpi: fix incorrect TEST_ALPHA() test ACPI / PM: Fix header of acpi_dev_pm_detach() in acpi.h ACPI / video: ignore BIOS initial backlight value for HP Folio 13-2000 ACPI : do not use Lid and Sleep button for S5 wakeup ACPI / PNP: Do not crash due to stale pointer use during system resume ACPI / video: Add "Asus UL30VT" to ACPI video detect blacklist ACPI: do acpisleep dmi check when CONFIG_ACPI_SLEEP is set spi / ACPI: add ACPI enumeration support gpio / ACPI: add ACPI support PM / devfreq: remove compiler error with module governors (2) cpupower: IvyBridge (0x3a and 0x3e models) support cpupower: Provide -c param for cpupower monitor to schedule process on all cores cpupower tools: Fix warning and a bug with the cpu package count cpupower tools: Fix malloc of cpu_info structure cpupower tools: Fix issues with sysfs_topology_read_file cpupower tools: Fix minor warnings cpupower tools: Update .gitignore for files created in the debug directories ... 
Pull ACPI and power management updates from Rafael Wysocki:

 - Introduction of device PM QoS flags.

 - ACPI device power management update allowing subsystems other than
   PCI to use it more easily.

 - ACPI device enumeration rework allowing additional kinds of devices
   to be enumerated via ACPI.  From Mika Westerberg, Adrian Hunter,
   Mathias Nyman, Andy Shevchenko, and Rafael J. Wysocki.

 - ACPICA update to version 20121018 from Bob Moore and Lv Zheng.

 - ACPI memory hotplug update from Wen Congyang and Yasuaki Ishimatsu.

 - Introduction of acpi_handle_<level>() messaging macros and ACPI-based
   CPU hot-remove support from Toshi Kani.

 - ACPI EC updates from Feng Tang.

 - cpufreq updates from Viresh Kumar, Fabio Baltieri and others.

 - cpuidle changes to quickly notice governor prediction failure from
   Youquan Song.

 - Support for using multiple cpuidle drivers at the same time and
   cpuidle cleanups from Daniel Lezcano.

 - devfreq updates from Nishanth Menon and others.

 - cpupower update from Thomas Renninger.

 - Fixes and small cleanups all over the place.

* tag 'pm+acpi-for-3.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (196 commits)
  mmc: sdhci-acpi: enable runtime-pm for device HID INT33C6
  ACPI: add Haswell LPSS devices to acpi_platform_device_ids list
  ACPI: add documentation about ACPI 5 enumeration
  pnpacpi: fix incorrect TEST_ALPHA() test
  ACPI / PM: Fix header of acpi_dev_pm_detach() in acpi.h
  ACPI / video: ignore BIOS initial backlight value for HP Folio 13-2000
  ACPI : do not use Lid and Sleep button for S5 wakeup
  ACPI / PNP: Do not crash due to stale pointer use during system resume
  ACPI / video: Add "Asus UL30VT" to ACPI video detect blacklist
  ACPI: do acpisleep dmi check when CONFIG_ACPI_SLEEP is set
  spi / ACPI: add ACPI enumeration support
  gpio / ACPI: add ACPI support
  PM / devfreq: remove compiler error with module governors (2)
  cpupower: IvyBridge (0x3a and 0x3e models) support
  cpupower: Provide -c param for cpupower monitor to schedule process on all cores
  cpupower tools: Fix warning and a bug with the cpu package count
  cpupower tools: Fix malloc of cpu_info structure
  cpupower tools: Fix issues with sysfs_topology_read_file
  cpupower tools: Fix minor warnings
  cpupower tools: Update .gitignore for files created in the debug directories
  ...
Merge tag 'clk-for-linus' of git://git.linaro.org/people/mturquette/linux 2012-12-11T19:25:08+00:00 Linus Torvalds torvalds@linux-foundation.org 2012-12-11T19:25:08+00:00 93874681aa3f538a2b9d59a6c5b7c0e882a36978 Pull clock framework changes from Mike Turquette: "The common clock framework changes for 3.8 are comprised of lots of fixes for existing platforms as well as new ports for some ARM platforms. In addition there are new clk drivers for audio devices and MFDs." Fix up trivial conflict in <linux/clk-provider.h> (removal of 'inline' clashing with return type fixes) * tag 'clk-for-linus' of git://git.linaro.org/people/mturquette/linux: (51 commits) MAINTAINERS: bad email address for Mike Turquette clk: introduce optional disable_unused callback clk: ux500: fix bit error clk: clock multiplexers may register out of order clk: ux500: Initial support for abx500 clock driver CLK: SPEAr: Remove unused dummy apb_pclk CLK: SPEAr: Correct index scanning done for clock synths CLK: SPEAr: Update clock rate table CLK: SPEAr: Add missing clocks CLK: SPEAr: Set CLK_SET_RATE_PARENT for few clocks CLK: SPEAr13xx: fix parent names of multiple clocks CLK: SPEAr13xx: Fix mux clock names CLK: SPEAr: Fix dev_id & con_id for multiple clocks clk: move IM-PD1 clocks to drivers/clk clk: make ICST driver handle the VCO registers clk: add GPLv2 headers to the Versatile clock files clk: mxs: Use a better name for the USB PHY clock clk: spear: Add stub functions for spear3[0|1|2]0_clk_init() CLK: clk-twl6040: fix return value check in twl6040_clk_probe() clk: ux500: Register nomadik keypad clock lookups for u8500 ... 
Pull clock framework changes from Mike Turquette:
 "The common clock framework changes for 3.8 are comprised of lots of
  fixes for existing platforms as well as new ports for some ARM
  platforms.  In addition there are new clk drivers for audio devices
  and MFDs."

Fix up trivial conflict in <linux/clk-provider.h> (removal of 'inline'
clashing with return type fixes)

* tag 'clk-for-linus' of git://git.linaro.org/people/mturquette/linux: (51 commits)
  MAINTAINERS: bad email address for Mike Turquette
  clk: introduce optional disable_unused callback
  clk: ux500: fix bit error
  clk: clock multiplexers may register out of order
  clk: ux500: Initial support for abx500 clock driver
  CLK: SPEAr: Remove unused dummy apb_pclk
  CLK: SPEAr: Correct index scanning done for clock synths
  CLK: SPEAr: Update clock rate table
  CLK: SPEAr: Add missing clocks
  CLK: SPEAr: Set CLK_SET_RATE_PARENT for few clocks
  CLK: SPEAr13xx: fix parent names of multiple clocks
  CLK: SPEAr13xx: Fix mux clock names
  CLK: SPEAr: Fix dev_id & con_id for multiple clocks
  clk: move IM-PD1 clocks to drivers/clk
  clk: make ICST driver handle the VCO registers
  clk: add GPLv2 headers to the Versatile clock files
  clk: mxs: Use a better name for the USB PHY clock
  clk: spear: Add stub functions for spear3[0|1|2]0_clk_init()
  CLK: clk-twl6040: fix return value check in twl6040_clk_probe()
  clk: ux500: Register nomadik keypad clock lookups for u8500
  ...
cpufreq: ondemand: update sampling rate only on right CPUs 2012-11-27T13:11:19+00:00 Fabio Baltieri fabio.baltieri@linaro.org 2012-11-26T18:10:12+00:00 3e33ee9e0804748f1b7a01af9ba0e8e1e10f772f Fix cpufreq_gov_ondemand to skip CPU where another governor is used. The bug present itself as NULL pointer access on the mutex_lock() call, an can be reproduced on an SMP machine by setting the default governor to anything other than ondemand, setting a single CPU's governor to ondemand, then changing the sample rate by writing on: > /sys/devices/system/cpu/cpufreq/ondemand/sampling_rate Backtrace: Nov 26 17:36:54 balto kernel: [ 839.585241] BUG: unable to handle kernel NULL pointer dereference at (null) Nov 26 17:36:54 balto kernel: [ 839.585311] IP: [<ffffffff8174e082>] __mutex_lock_slowpath+0xb2/0x170 [snip] Nov 26 17:36:54 balto kernel: [ 839.587005] Call Trace: Nov 26 17:36:54 balto kernel: [ 839.587030] [<ffffffff8174da82>] mutex_lock+0x22/0x40 Nov 26 17:36:54 balto kernel: [ 839.587067] [<ffffffff81610b8f>] store_sampling_rate+0xbf/0x150 Nov 26 17:36:54 balto kernel: [ 839.587110] [<ffffffff81031e9c>] ? __do_page_fault+0x1cc/0x4c0 Nov 26 17:36:54 balto kernel: [ 839.587153] [<ffffffff813309bf>] kobj_attr_store+0xf/0x20 Nov 26 17:36:54 balto kernel: [ 839.587192] [<ffffffff811bb62d>] sysfs_write_file+0xcd/0x140 Nov 26 17:36:54 balto kernel: [ 839.587234] [<ffffffff8114c12c>] vfs_write+0xac/0x180 Nov 26 17:36:54 balto kernel: [ 839.587271] [<ffffffff8114c472>] sys_write+0x52/0xa0 Nov 26 17:36:54 balto kernel: [ 839.587306] [<ffffffff810321ce>] ? do_page_fault+0xe/0x10 Nov 26 17:36:54 balto kernel: [ 839.587345] [<ffffffff81751202>] system_call_fastpath+0x16/0x1b Signed-off-by: Fabio Baltieri <fabio.baltieri@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> 
Fix cpufreq_gov_ondemand to skip CPU where another governor is used.

The bug present itself as NULL pointer access on the mutex_lock() call,
an can be reproduced on an SMP machine by setting the default governor
to anything other than ondemand, setting a single CPU's governor to
ondemand, then changing the sample rate by writing on:

> /sys/devices/system/cpu/cpufreq/ondemand/sampling_rate

Backtrace:

Nov 26 17:36:54 balto kernel: [  839.585241] BUG: unable to handle kernel NULL pointer dereference at           (null)
Nov 26 17:36:54 balto kernel: [  839.585311] IP: [<ffffffff8174e082>] __mutex_lock_slowpath+0xb2/0x170
[snip]
Nov 26 17:36:54 balto kernel: [  839.587005] Call Trace:
Nov 26 17:36:54 balto kernel: [  839.587030]  [<ffffffff8174da82>] mutex_lock+0x22/0x40
Nov 26 17:36:54 balto kernel: [  839.587067]  [<ffffffff81610b8f>] store_sampling_rate+0xbf/0x150
Nov 26 17:36:54 balto kernel: [  839.587110]  [<ffffffff81031e9c>] ?  __do_page_fault+0x1cc/0x4c0
Nov 26 17:36:54 balto kernel: [  839.587153]  [<ffffffff813309bf>] kobj_attr_store+0xf/0x20
Nov 26 17:36:54 balto kernel: [  839.587192]  [<ffffffff811bb62d>] sysfs_write_file+0xcd/0x140
Nov 26 17:36:54 balto kernel: [  839.587234]  [<ffffffff8114c12c>] vfs_write+0xac/0x180
Nov 26 17:36:54 balto kernel: [  839.587271]  [<ffffffff8114c472>] sys_write+0x52/0xa0
Nov 26 17:36:54 balto kernel: [  839.587306]  [<ffffffff810321ce>] ?  do_page_fault+0xe/0x10
Nov 26 17:36:54 balto kernel: [  839.587345]  [<ffffffff81751202>] system_call_fastpath+0x16/0x1b

Signed-off-by: Fabio Baltieri <fabio.baltieri@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
cpufreq: SPEAr: Add CPUFreq driver 2012-11-27T13:05:26+00:00 Deepak Sikri deepak.sikri@st.com 2012-11-27T13:05:26+00:00 420993221175a45db5af012c53fd2fef4d9533dc SPEAr is an ARM based family of SoCs. This patch adds in support of cpufreq driver for SPEAr SoCs. It is supported via DT only and so bindings are present in binding document. Signed-off-by: Deepak Sikri <deepak.sikri@st.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> 
SPEAr is an ARM based family of SoCs. This patch adds in support of cpufreq
driver for SPEAr SoCs. It is supported via DT only and so bindings are present
in binding document.

Signed-off-by: Deepak Sikri <deepak.sikri@st.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
cpufreq: governors: Fix jiffies/cputime mixup (revisited) 2012-11-24T09:08:47+00:00 Rafael J. Wysocki rafael.j.wysocki@intel.com 2012-11-24T09:08:47+00:00 a0e5af3cb89b59aa6c62b1f97c8d553ff3fb51c1 This change was made by commit 8636fd2 (cpufreq: fix jiffies/cputime mixup in conservative/ondemand governors) before, but then it has been reverted inadvertently by commit 4471a34 (cpufreq: governors: remove redundant code). The changelog of commit 8636fd2's says: The function get_cpu_idle_time_jiffy in both the conservative and ondemand governors use jiffies_to_usecs to convert a cputime value to usecs which gives the wrong value on architectures where cputime and jiffies use different units. Only matters if NO_HZ is disabled, since otherwise get_cpu_idle_time_us should already return a valid value, and get_cpu_idle_time_jiffy isn't actually called. Since now we have only one common get_cpu_idle_time_jiffy() used by both governors in question, modify it along the lines of commit 8636fd2 to restore the correct behavior. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org> 
This change was made by commit 8636fd2 (cpufreq: fix jiffies/cputime
mixup in conservative/ondemand governors) before, but then it has
been reverted inadvertently by commit 4471a34 (cpufreq: governors:
remove redundant code).

The changelog of commit 8636fd2's says:

  The function get_cpu_idle_time_jiffy in both the conservative and
  ondemand governors use jiffies_to_usecs to convert a cputime value
  to usecs which gives the wrong value on architectures where cputime
  and jiffies use different units.  Only matters if NO_HZ is
  disabled, since otherwise get_cpu_idle_time_us should already
  return a valid value, and get_cpu_idle_time_jiffy isn't actually
  called.

Since now we have only one common get_cpu_idle_time_jiffy() used by
both governors in question, modify it along the lines of commit
8636fd2 to restore the correct behavior.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
cpufreq: ondemand: fix wrong delay sampling rate 2012-11-23T19:48:08+00:00 Fabio Baltieri fabio.baltieri@linaro.org 2012-11-23T19:48:08+00:00 d3c31a773fa33f78a29bb00ed0dcf8fa55dd4b3a Restore the correct delay value for ondemand's od_dbs_timer, as it was changed erroneously in commit 83f0e55 (cpufreq: governors: remove redundant code). Signed-off-by: Fabio Baltieri <fabio.baltieri@linaro.org> Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> 
Restore the correct delay value for ondemand's od_dbs_timer, as it was
changed erroneously in commit 83f0e55 (cpufreq: governors: remove
redundant code).

Signed-off-by: Fabio Baltieri <fabio.baltieri@linaro.org>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
cpufreq: exynos: Use static for functions used in only this file 2012-11-21T23:19:25+00:00 Tushar Behera tushar.behera@linaro.org 2012-11-21T23:19:25+00:00 5542721a337f3fcfa0585c915827dc391f36fd28 Fixes following sparse error. drivers/cpufreq/exynos-cpufreq.c:34:5: warning: symbol 'exynos_verify_speed' was not declared. Should it be static? drivers/cpufreq/exynos-cpufreq.c:40:14: warning: symbol 'exynos_getspeed' was not declared. Should it be static? Signed-off-by: Tushar Behera <tushar.behera@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> 
Fixes following sparse error.
drivers/cpufreq/exynos-cpufreq.c:34:5: warning: symbol
'exynos_verify_speed' was not declared. Should it be static?
drivers/cpufreq/exynos-cpufreq.c:40:14: warning: symbol
'exynos_getspeed' was not declared. Should it be static?

Signed-off-by: Tushar Behera <tushar.behera@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
cpufreq: exynos: Broadcast frequency change notifications for all cores 2012-11-21T23:09:27+00:00 Tomasz Figa t.figa@samsung.com 2012-11-21T23:09:27+00:00 fd06a20852e145b2b96c7c6b655fcb9f23ac4e00 On Exynos SoCs all cores share the same frequency setting, so changing frequency of one core will affect rest of cores. This patch modifies the exynos-cpufreq driver to inform cpufreq core about this behavior and broadcast frequency change notifications for all cores. Signed-off-by: Tomasz Figa <t.figa@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> 
On Exynos SoCs all cores share the same frequency setting, so changing
frequency of one core will affect rest of cores.

This patch modifies the exynos-cpufreq driver to inform cpufreq core
about this behavior and broadcast frequency change notifications for all
cores.

Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
cpufreq: remove use of __devexit 2012-11-21T00:18:49+00:00 Bill Pemberton wfp5p@virginia.edu 2012-11-21T00:18:49+00:00 c0e61cb151f2ff8edd02af23b2bd49f625288124 CONFIG_HOTPLUG is going away as an option so __devexit is no longer needed. Signed-off-by: Bill Pemberton <wfp5p@virginia.edu> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> 
CONFIG_HOTPLUG is going away as an option so __devexit is no
longer needed.

Signed-off-by: Bill Pemberton <wfp5p@virginia.edu>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
cpufreq: remove use of __devinit 2012-11-21T00:18:40+00:00 Bill Pemberton wfp5p@virginia.edu 2012-11-21T00:18:40+00:00 c5fa4ab5ab417d8d7bd658957ce7b7e6ef0cdaf3 CONFIG_HOTPLUG is going away as an option so __devinit is no longer needed. Signed-off-by: Bill Pemberton <wfp5p@virginia.edu> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> 
CONFIG_HOTPLUG is going away as an option so __devinit is no longer
needed.

Signed-off-by: Bill Pemberton <wfp5p@virginia.edu>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>