Commit Graph

11 Commits

Author SHA1 Message Date
Linus Torvalds 2af78448ff Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux
Pull thermal management updates from Zhang Rui:
 "Highlights:

   - introduction of Dove thermal sensor driver.

   - introduction of Kirkwood thermal sensor driver.

   - introduction of intel_powerclamp thermal cooling device driver.

   - add interrupt and DT support for rcar thermal driver.

   - add thermal emulation support which allows platform thermal driver
     to do software/hardware emulation for thermal issues."

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux: (36 commits)
  thermal: rcar: remove __devinitconst
  thermal: return an error on failure to register thermal class
  Thermal: rename thermal governor Kconfig option to avoid generic naming
  thermal: exynos: Use the new thermal trend type for quick cooling action.
  Thermal: exynos: Add support for temperature falling interrupt.
  Thermal: Dove: Add Themal sensor support for Dove.
  thermal: Add support for the thermal sensor on Kirkwood SoCs
  thermal: rcar: add Device Tree support
  thermal: rcar: remove machine_power_off() from rcar_thermal_notify()
  thermal: rcar: add interrupt support
  thermal: rcar: add read/write functions for common/priv data
  thermal: rcar: multi channel support
  thermal: rcar: use mutex lock instead of spin lock
  thermal: rcar: enable CPCTL to use hardware TSC deciding
  thermal: rcar: use parenthesis on macro
  Thermal: fix a build warning when CONFIG_THERMAL_EMULATION cleared
  Thermal: fix a wrong comment
  thermal: sysfs: Add a new sysfs node emul_temp for thermal emulation
  PM: intel_powerclamp: off by one in start_power_clamp()
  thermal: exynos: Miscellaneous fixes to support falling threshold interrupt
  ...
2013-02-28 19:48:26 -08:00
Tejun Heo 6deb69face thermal: convert to idr_alloc()
Convert to the much saner new idr interface.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-02-27 19:10:19 -08:00
Zhang Rui 475f41c3ab Thermal: fix a wrong comment
"level" parameter of get_cpu_frequency equals cooling state
of cpu cooling device, and it starts from 0.

Fix the misleading comment.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
2013-02-06 14:13:56 +08:00
Eduardo Valentin 3778ff5c70 thermal: cpu cooling: use const parameter while registering
There are predefined cpu_masks that are const data structures.
This patch changes the cpu cooling register function so that
those const cpu_masks can be used, without compilation warnings.

include/linux/cpumask.h

 * The following particular system cpumasks and operations manage
 * possible, present, active and online cpus.
 *
 *     cpu_possible_mask- has bit 'cpu' set iff cpu is populatable
 *     cpu_present_mask - has bit 'cpu' set iff cpu is populated
 *     cpu_online_mask  - has bit 'cpu' set iff cpu available to scheduler
 *     cpu_active_mask  - has bit 'cpu' set iff cpu available to migration
 *

Signed-off-by: Eduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
2012-11-22 15:59:47 +08:00
Sachin Kamat a0f846c23c thermal: cpu_cooling: Make 'notify_device' static
Silences the following sparse warning:

drivers/thermal/cpu_cooling.c:67:31: warning:
symbol 'notify_device' was not declared. Should it be static?

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
2012-11-15 16:48:40 +08:00
hongbo.zhang 160b7d8048 Thermal: Remove the cooling_cpufreq_list.
Problem of using this list is that the cpufreq_get_max_state callback will be
called when register cooling device by thermal_cooling_device_register, but
this list isn't ready at this moment. What's more, there is no need to maintain
such a list, we can get cpufreq_cooling_device instance by the private
thermal_cooling_device.devdata.

Signed-off-by: hongbo.zhang <hongbo.zhang@linaro.com>
Reviewed-by: Francesco Lavra <francescolavra.fl@gmail.com>
Reviewed-by: Amit Daniel Kachhap <amit.kachhap@linaro.org>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
2012-11-07 14:52:27 +08:00
hongbo.zhang 9c51b05a78 Thermal: fix bug of counting cpu frequencies.
In the while loop for counting cpu frequencies, if table[i].frequency equals
CPUFREQ_ENTRY_INVALID, index i won't be increased, so this leads to an endless
loop, what's more the index i cannot be referred as cpu frequencies number if
there is CPUFREQ_ENTRY_INVALID case.

Signed-off-by: hongbo.zhang <hongbo.zhang@linaro.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Amit Daniel Kachhap <amit.kachhap@linaro.org>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
2012-11-07 14:49:43 +08:00
hongbo.zhang 6b6519df84 Thermal: add indent for code alignment.
The curly bracket should be aligned with corresponding if else statements.

Signed-off-by: hongbo.zhang <hongbo.zhang@linaro.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
2012-11-07 14:49:25 +08:00
Len Brown 29b19e2504 Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux into thermal
Conflicts:
	drivers/staging/omap-thermal/omap-thermal-common.
		OMAP supplied dummy TC1 and TC2,
		at the same time that the thermal tree removed them
		from thermal_zone_device_register()

	drivers/thermal/cpu_cooling.c b/drivers/thermal/cpu_cooling.c
		propogate the upstream MAX_IDR_LEVEL re-name
			to prevent a build failure

	Previously-fixed-by: Stephen Rothwell <sfr@canb.auug.org.au>

Signed-off-by: Len Brown <len.brown@intel.com>
2012-10-09 01:35:52 -04:00
Jonghwa Lee a4b6fec977 Thermal: Fix bug on cpu_cooling, cooling device's id conflict problem.
This patch fixes small bug on cpu_cooling. CPU cooling device has own
id generated with idr mathod. However in the previous version, it swapped
to all same id at last stage of probing as 0. This makes id's collision and
also occures error when it releases that id.

Signed-off-by: Jonghwa Lee <jonghwa3.lee@samsung.com>
2012-09-27 14:11:22 +08:00
Amit Daniel Kachhap 0236141837 thermal: add generic cpufreq cooling implementation
This patchset introduces a new generic cooling device based on cpufreq
that can be used on non-ACPI platforms.  As a proof of concept, we have
drivers for the following platforms using this mechanism now:

 * Samsung Exynos (Exynos4 and Exynos5) in the current patchset.
 * Freescale i.MX (git://git.linaro.org/people/amitdanielk/linux.git imx6q_thermal)

There is a small change in cpufreq cooling registration APIs, so a minor
change is needed for Freescale platforms.

Brief Description:

1) The generic cooling devices code is placed inside driver/thermal/*
   as placing inside acpi folder will need un-necessary enabling of acpi
   code.  This code is architecture independent.

2) This patchset adds generic cpu cooling low level implementation
   through frequency clipping.  In future, other cpu related cooling
   devices may be added here.  An ACPI version of this already exists
   (drivers/acpi/processor_thermal.c) .But this will be useful for
   platforms like ARM using the generic thermal interface along with the
   generic cpu cooling devices.  The cooling device registration API's
   return cooling device pointers which can be easily binded with the
   thermal zone trip points.  The important APIs exposed are,

   a) struct thermal_cooling_device *cpufreq_cooling_register(
        struct cpumask *clip_cpus)
   b) void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev)

3) Samsung exynos platform thermal implementation is done using the
   generic cpu cooling APIs and the new trip type.  The temperature sensor
   driver present in the hwmon folder(registered as hwmon driver) is moved
   to thermal folder and registered as a thermal driver.

A simple data/control flow diagrams is shown below,

Core Linux thermal <----->  Exynos thermal interface <----- Temperature Sensor
          |                             |
         \|/                            |
  Cpufreq cooling device <---------------

TODO:
*Will send the DT enablement patches later after the driver is merged.

This patch:

Add support for generic cpu thermal cooling low level implementations
using frequency scaling up/down based on the registration parameters.
Different cpu related cooling devices can be registered by the user and
the binding of these cooling devices to the corresponding trip points can
be easily done as the registration APIs return the cooling device pointer.
The user of these APIs are responsible for passing clipping frequency .
The drivers can also register to recieve notification about any cooling
action called.

[akpm@linux-foundation.org: fix comment layout]
Signed-off-by: Amit Daniel Kachhap <amit.kachhap@linaro.org>
Cc: Guenter Roeck <guenter.roeck@ericsson.com>
Cc: SangWook Ju <sw.ju@samsung.com>
Cc: Durgadoss <durgadoss.r@intel.com>
Cc: Len Brown <lenb@kernel.org>
Cc: Jean Delvare <khali@linux-fr.org>
Cc: Kyungmin Park <kmpark@infradead.org>
Cc: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Amit Daniel Kachhap <amit.daniel@samsung.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
2012-09-24 14:44:38 +08:00