Power Management list

Sachin Kamat | 21 May 2013 11:20

[PATCH 1/1] Thermal: spear: Fix compilation error

Fixes the following compilation error introduced by commit 253e3ae170
(Thermal: spear_thermal: convert to devm_ioremap_resource).
drivers/thermal/spear_thermal.c: In function ‘spear_thermal_probe’:
drivers/thermal/spear_thermal.c:123:46: error: ‘dev’ undeclared
(first use in this function)
stdev->thermal_base = devm_ioremap_resource(dev, res);

While at it also remove the error message as devm_ioremap_resource()
provides its own error messages.

Signed-off-by: Sachin Kamat <sachin.kamat <at> linaro.org>
Cc: Vincenzo Frascino <vincenzo.frascino <at> st.com>
Cc: Viresh Kumar <viresh.kumar <at> linaro.org>
---
Compile tested and based on linux-next (20130521).
---
 drivers/thermal/spear_thermal.c |    6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/thermal/spear_thermal.c b/drivers/thermal/spear_thermal.c
index fa30918..813add6 100644
--- a/drivers/thermal/spear_thermal.c
+++ b/drivers/thermal/spear_thermal.c
 <at>  <at>  -120,11 +120,9  <at>  <at>  static int spear_thermal_probe(struct platform_device *pdev)

 	/* Enable thermal sensor */
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	stdev->thermal_base = devm_ioremap_resource(dev, res);
-	if (IS_ERR(stdev->thermal_base)) {
-		dev_err(&pdev->dev, "ioremap failed\n");

(Continue reading)

mohamed haneef | 20 May 2013 18:39

Picon

linux power management

Hi, I would like to learn power management module programming, any
suggestions other than the kernel documentation and googling. like
books specific to power management it would be ok even if the book is
not related to linux power mangement ( I would relate it no problem )

thanks in advance.
--
To unsubscribe from this list: send the line "unsubscribe linux-pm" in
the body of a message to majordomo <at> vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

mohamed haneef | 20 May 2013 18:41

Picon

linux power management

Hi, I would like to learn power management module programming, any
suggestions other than the kernel documentation and googling. like
books specific to power management it would be ok even if the book is
not related to linux power mangement ( I would relate it no problem )

thanks in advance.
--
To unsubscribe from this list: send the line "unsubscribe linux-pm" in
the body of a message to majordomo <at> vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Rafal Bilski | 19 May 2013 21:27

Picon

[PATCH] e_powersaver: Fix linker error when ACPI processor is a module

on i386:
CONFIG_ACPI_PROCESSOR=m
CONFIG_X86_E_POWERSAVER=y

drivers/built-in.o: In function `eps_cpu_init.part.8':
e_powersaver.c:(.text.unlikely+0x2243): undefined reference to `acpi_processor_register_performance'
e_powersaver.c:(.text.unlikely+0x22a2): undefined reference to `acpi_processor_unregister_performance'
e_powersaver.c:(.text.unlikely+0x246b): undefined reference to `acpi_processor_get_bios_limit'

X86_E_POWERSAVER should also depend on ACPI_PROCESSOR.

Signed-off-by: Rafal Bilski <rafalbilski <at> interia.pl>
---
 drivers/cpufreq/Kconfig.x86 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/cpufreq/Kconfig.x86 b/drivers/cpufreq/Kconfig.x86
index 2b8a8c3..6bd63d6 100644
--- a/drivers/cpufreq/Kconfig.x86
+++ b/drivers/cpufreq/Kconfig.x86
 <at>  <at>  -272,7 +272,7  <at>  <at>  config X86_LONGHAUL
 config X86_E_POWERSAVER
 	tristate "VIA C7 Enhanced PowerSaver (DANGEROUS)"
 	select CPU_FREQ_TABLE
-	depends on X86_32
+	depends on X86_32 && ACPI_PROCESSOR
 	help
 	  This adds the CPUFreq driver for VIA C7 processors.  However, this driver
 	  does not have any safeguards to prevent operating the CPU out of spec
--

--

(Continue reading)

Jonghwa Lee | 18 May 2013 11:51

[PATCH 3/3] Thermal:core: Handle trips focused on current trip point only.

When thermal zone device is updated, it doesn't need to check
every trip points and its handling mathod even current temperature
doesn't exceed the trip's temperature. To modify those dissipatve
mechanism, this patch introduces the way to get current thermal
trip point to call only correspond trip point handling.

Signed-off-by: Jonghwa Lee <jonghwa3.lee <at> samsung.com>
Signed-off-by: MyungJoo Ham <myungjoo.ham <at> samsung.com>
---
 drivers/thermal/thermal_core.c |   28 +++++++++++++++++-----------
 1 file changed, 17 insertions(+), 11 deletions(-)

diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index ce4384a..1cc4825 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
 <at>  <at>  -333,14 +333,6  <at>  <at>  static void handle_non_critical_trips(struct thermal_zone_device *tz,
 static void handle_critical_trips(struct thermal_zone_device *tz,
 				int trip, enum thermal_trip_type trip_type)
 {
-	long trip_temp;
-
-	tz->ops->get_trip_temp(tz, trip, &trip_temp);
-
-	/* If we have not crossed the trip_temp, we do not care. */
-	if (tz->temperature < trip_temp)
-		return;
-
 	if (tz->ops->notify)
 		tz->ops->notify(tz, trip, trip_type);

(Continue reading)

Jonghwa Lee | 18 May 2013 11:50

[PATCH 2/3] Thermal: core: Modify temp_crit_show() to use proper callback function.

This patch modifies temp_crit_show() which is used to create hwmon's sysfs
node to use .get_crit_temp callback function of thermal zone device rather
than .get_trip_temp.

Signed-off-by: Jonghwa Lee <jonghwa3.lee <at> samsung.com>
Signed-off-by: MyungJoo Ham <myungjoo.ham <at> samsung.com>
---
 drivers/thermal/thermal_core.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index f753f48..ce4384a 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
 <at>  <at>  -924,7 +924,7  <at>  <at>  temp_crit_show(struct device *dev, struct device_attribute *attr,
 	long temperature;
 	int ret;

-	ret = tz->ops->get_trip_temp(tz, 0, &temperature);
+	ret = tz->ops->get_crit_temp(tz, &temperature);
 	if (ret)
 		return ret;

--

-- 
1.7.9.5

--
To unsubscribe from this list: send the line "unsubscribe linux-pm" in
the body of a message to majordomo <at> vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

(Continue reading)

Jonghwa Lee | 18 May 2013 11:50

[PATCH 1/3] Thermal: core: Ask .get_trip_temp() to register thermal zone device.

This patch adds a requirement needing .get_trip_temp() callback
function for registering thermal zone device. This function is
used when thermal zone is updated and essential where thermal core
handles thermal trip based only polling way not hw interrupt.

Signed-off-by: Jonghwa Lee <jonghwa3.lee <at> samsung.com>
Signed-off-by: MyungJoo Ham <myungjoo.ham <at> samsung.com>
---
 drivers/thermal/thermal_core.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index d755440..f753f48 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
 <at>  <at>  -1624,7 +1624,7  <at>  <at>  struct thermal_zone_device *thermal_zone_device_register(const char *type,
 	if (!ops || !ops->get_temp)
 		return ERR_PTR(-EINVAL);

-	if (trips > 0 && !ops->get_trip_type)
+	if (trips > 0 && (!ops->get_trip_type || !ops->get_trip_temp))
 		return ERR_PTR(-EINVAL);

 	tz = kzalloc(sizeof(struct thermal_zone_device), GFP_KERNEL);
--

-- 
1.7.9.5

--
To unsubscribe from this list: send the line "unsubscribe linux-pm" in
the body of a message to majordomo <at> vger.kernel.org

(Continue reading)

Srinivas Pandruvada | 18 May 2013 01:42

Picon

[PATCH 0/3] CPU Package temperarure thermal driver (v02)

This driver register CPU digital temperature package level sensor as a
thermal zone with two user mode configurable trip points. Once
the trip point is violated, user mode can receive notification via thermal
notification mechanism and can take any action to control temperature.

Changes:
v02:
Did majority of changes suggested by Eduardo Valentin. Main changes are:
- Module parameters for rate control delay
- Removed user space gov parameter in thermal_zone_register
- Changes related to returning of errors values
- Error code return values

v01:
First version for review

Background:
This set of changes were done to coretemp driver and posted to lm_sensors
mailing list on 04/04/2013. This was reviewed by Guenter Roeck from lm-sensors
and Zhang Rui (thermal maintainer). They were in agreement not to add notification
mechanism to coretemp driver but use thermal sysfs.
Guenter Roeck suggested to use approach like "db8500_thermal driver in drivers/thermal".
So resubmitting the driver as a thermal zone driver.
Previous discussion link:
http://comments.gmane.org/gmane.linux.drivers.sensors/32182
" 
This is clear that there is reluctance in adding thresholds in coretemp sysfs,
during previous attempts. Probably because of lake of use cases.
But this time use case may be more compelling.

(Continue reading)

Rob Herring | 17 May 2013 21:36

Picon

spurious bL cpufreq driver messages

The bL cpufreq driver appears to collide with the cpufreq-cpu0 driver.
There doesn't appear to be a functional problem, but just spurious
prints which indicate it is trying to do something. I think it needs
better checking whether the chip is actually multi-cluster. This is what
I get when I hotplug cpus:

[  909.372319] CPU1: Booted secondary processor
[  909.372616] cpu cpu1: get_cluster_clk_and_freq_table: init_opp_table
failed, cpu: 1, err: -61
[  909.385411] cpu cpu1: get_cluster_clk_and_freq_table: Failed to get
data for cluster: 9
[  909.394161] CPU2: shutdown
[  909.400957] CPU2: Booted secondary processor
[  909.401253] cpu cpu2: get_cluster_clk_and_freq_table: init_opp_table
failed, cpu: 2, err: -61
[  909.414044] cpu cpu2: get_cluster_clk_and_freq_table: Failed to get
data for cluster: 9

Rob
--
To unsubscribe from this list: send the line "unsubscribe linux-pm" in
the body of a message to majordomo <at> vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Brandt, Todd E | 17 May 2013 21:03

Picon

[PATCH v2 1/2] ATA/SCSI subsystem resume path made fully asynchronous

This patch goes through and sets the power.async_suspend flag for every device
in the ATA/SCSI resume path. This includes the ata port, link, and dev
devices, the scsi host and target devices, all their associated transport
devices, the block devices, and block partitions. This allows the entire
ATA resume path to be added to the async device queue in
drivers/base/power/main.c. Without this, the ATA resume path ends up in
both queues (sync and async), which causes interdependencies and backs up
the two queues.

Changelog:
v2:
        - Updated patch submission. Incorporates comments from Tejun Heo.   
          Fixed pr_debug format, No functional changes.

Signed-off-by: Todd Brandt <todd.e.brandt <at> intel.com>
---
 block/genhd.c                      |    2 ++
 block/partition-generic.c          |    1 +
 drivers/ata/libata-transport.c     |    4 +++-
 drivers/base/attribute_container.c |    1 +
 drivers/base/core.c                |    8 +++++++-
 drivers/scsi/scsi_sysfs.c          |    2 +-
 drivers/scsi/sd.c                  |    3 +++
 7 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/block/genhd.c b/block/genhd.c
index 7dcfdd8..3825d45 100644
--- a/block/genhd.c
+++ b/block/genhd.c
 <at>  <at>  -525,6 +525,8  <at>  <at>  static void register_disk(struct gendisk *disk)

(Continue reading)

Brandt, Todd E | 17 May 2013 21:00

Picon

[PATCH v2 0/2] Hard disk S3 resume time optimization

The vast majority of time spent in S3 resume is consumed by the ATA 
subsystem as it resumes the computer's hard drives. For large hard disks
this time can be upwards of 10 seconds, which makes S3 suspend/resume too
costly to use frequently. This time needs to be reduced.

More details here:
https://01.org/suspendresume/blogs/tebrandt/2013/hard-disk-resume-worst-offender

This patch set effectively reduces S3 resume time from multiple seconds
to less than 700ms. The idea is to allow the ATA/SCSI subsystems to resume
asynchronously without blocking system resume completion. The dpm_resume
call currently waits for all asynchronous devices to finish resuming before
it gives control back to the user. But in the case of ATA/SCSI we can give
control back immediately, since the hard disks won't be needed immediately
in lieu of RAM and cache.

Patch 1/2 goes through and sets the power.async_suspend flag for every device
in the ATA/SCSI resume path. This includes the ata port, link, and dev
devices, the scsi host and target devices, all their associated transport
devices, the block devices, and block partitions. This allows the entire
ATA resume path to be added to the async device queue in
drivers/base/power/main.c. Without this, the ATA resume path ends up in
both queues (sync and async), which causes interdependencies and backs up
the two queues.

Patch 2/2 updates the drivers/base/power subsystem to allow any devices which
have registred as asynchronous and who have not registered "complete"
callbacks to be non-blocking. The ATA/SCSI subsystem devices don't
register complete callbacks, so they automatically use the new feature.

(Continue reading)

Group

gmane.linux.power-management.general.

Search Archive

Page

1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11

May 2013

Language

Change language

Options

Current view: Threads only / Showing only 20 lines / Not hiding cited text.
Change to All messages, whole messages, or hide cited text.

Post a message
NNTP Newsgroup
Classic Gmane web interface
XML

XML

RSS Feed
List Information

About Gmane

Recent entries

[PATCH 1/1] Thermal: spear: Fix compilation error (21 May 2013)
linux power management (20 May 2013)
linux power management (20 May 2013)
[PATCH] e_powersaver: Fix linker error when ACPI processor is a module (19 May 2013)
[PATCH 3/3] Thermal:core: Handle trips focused on current trip point o (18 May 2013)
[PATCH 2/3] Thermal: core: Modify temp_crit_show() to use proper callb (18 May 2013)
[PATCH 1/3] Thermal: core: Ask .get_trip_temp() to register thermal zo (18 May 2013)
[PATCH 0/3] CPU Package temperarure thermal driver (v02) (18 May 2013)
spurious bL cpufreq driver messages (17 May 2013)
[PATCH v2 1/2] ATA/SCSI subsystem resume path made fully asynchronous (17 May 2013)
[PATCH v2 0/2] Hard disk S3 resume time optimization (17 May 2013)
[PATCH v3] thermal: cut the spaces when user sets policy (17 May 2013)
[GIT PULL] Power management and ACPI fixes for v3.10-rc2 (16 May 2013)
[PATCH 1/4] Thermal: armada: Remove redundant use of of_match_ptr (16 May 2013)
[PATCH] cpufreq: fix governor start/stop race condition (16 May 2013)
[PATCH 1/2] Thermal: spear_thermal: convert to devm_ioremap_resource (16 May 2013)
[PATCH 0/2] Quiet power limit notification (15 May 2013)
[PATCH 0/2] staging -> thermal: move ti-soc-thermal to drivers/thermal (15 May 2013)
[PATCH] cpuidle: simplify multiple driver support (14 May 2013)
S3, SMP non boot cpus and /sys/devices/system/cpu[1-9]/cpufreq/scaling (13 May 2013)
Kobject_uevent in cpufreq.c (13 May 2013)

Archives

368	May 2013
650	April 2013
607	March 2013
477	February 2013
382	January 2013
338	December 2012
423	November 2012
175	October 2012
14	September 2012
28	August 2012
96	July 2012
119	June 2012
138	May 2012
91	April 2012
97	March 2012
65	February 2012
138	January 2012
80	December 2011
215	November 2011
26	October 2011
116	September 2011
584	August 2011
368	July 2011
452	June 2011
350	May 2011
398	April 2011
354	March 2011
370	February 2011
320	January 2011
306	December 2010
159	November 2010
387	October 2010
472	September 2010
667	August 2010
251	July 2010
935	June 2010
1270	May 2010
305	April 2010
315	March 2010
335	February 2010
331	January 2010
561	December 2009
301	November 2009
167	October 2009
185	September 2009
466	August 2009
237	July 2009
472	June 2009
596	May 2009
356	April 2009
260	March 2009
699	February 2009
303	January 2009
158	December 2008
185	November 2008
188	October 2008
137	September 2008
268	August 2008
294	July 2008
203	June 2008
171	May 2008
250	April 2008
499	March 2008
494	February 2008
356	January 2008
326	December 2007
290	November 2007
152	October 2007
239	September 2007
366	August 2007
1162	July 2007
420	June 2007
488	May 2007
462	April 2007
628	March 2007
268	February 2007
142	January 2007
152	December 2006
139	November 2006
187	October 2006
270	September 2006
403	August 2006
207	July 2006
466	June 2006
76	May 2006
136	April 2006
75	March 2006
162	February 2006
154	January 2006
113	December 2005
136	November 2005
82	October 2005
112	September 2005
121	August 2005
120	July 2005
60	June 2005
83	May 2005
110	April 2005
257	March 2005
1	January 2002
1	April 2001

Design

Zawodny | Right Menu | Left Menu

Your Own Design

Paste the URL of your CSS below. Download CSS template