linux-toradex.git/drivers/powercap, branch v3.14.57 Linux kernel for Apalis and Colibri modules powercap / RAPL: add support for ValleyView Soc 2013-12-22T00:27:51+00:00 Jacob Pan jacob.jun.pan@linux.intel.com 2013-12-11T22:39:27+00:00 ed93b71492da3464b4798613aa8a99bed914251b This patch adds support for RAPL on Intel ValleyView based SoC platforms, such as Baytrail. Besides adding CPU ID, special energy unit encoding is handled for ValleyView. Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> 
This patch adds support for RAPL on Intel ValleyView based SoC
platforms, such as Baytrail.

Besides adding CPU ID, special energy unit encoding is handled
for ValleyView.

Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
PowerCap: Fix mode for energy counter 2013-12-05T01:05:48+00:00 Srinivas Pandruvada srinivas.pandruvada@linux.intel.com 2013-12-04T19:12:59+00:00 95677a9a3847de4f37e0f463aeb94aa8d5cccc50 As per the documentation of powercap sysfs, energy_uj field is read only, if it can't be reset. Currently it always allows write but will fail, if there is no reset callback. Changing mode field, to read only if there is no reset callback. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Reported-by: Dirk Brandewie <dirk.j.brandewie@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> 
As per the documentation of powercap sysfs, energy_uj field is read only,
if it can't be reset. Currently it always allows write but will fail,
if there is no reset callback.
Changing mode field, to read only if there is no reset callback.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Reported-by: Dirk Brandewie <dirk.j.brandewie@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
PowerCap: Fix build error with option -Werror=format-security 2013-11-05T01:36:57+00:00 Srinivas Pandruvada srinivas.pandruvada@linux.intel.com 2013-11-04T16:53:10+00:00 08ff4cbe10da402e7c493ac72e298975f62a9e78 Fix compile error with gcc option: -Werror=format-security for dev_set_name(&control_type->dev, name). Changed to dev_set_name(&control_type->dev, "%s", name). Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Acked-by: Kees Cook <keescook@chromium.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> 
Fix compile error with gcc option: -Werror=format-security for
dev_set_name(&control_type->dev, name).

Changed to dev_set_name(&control_type->dev, "%s", name).

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
PowerCap: Convert class code to use dev_groups 2013-10-25T21:16:31+00:00 Thierry Reding thierry.reding@gmail.com 2013-10-23T11:37:35+00:00 9e3410b764b79670a59d6c1ccdcad483b92c058c The newly added power capping framework uses the obsolete .dev_attrs field of struct class. However this field will be removed in 3.13, so convert the code to use the .dev_groups field instead. Signed-off-by: Thierry Reding <treding@nvidia.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> 
The newly added power capping framework uses the obsolete .dev_attrs
field of struct class. However this field will be removed in 3.13, so
convert the code to use the .dev_groups field instead.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
PowerCap: Introduce Intel RAPL power capping driver 2013-10-18T11:29:52+00:00 Jacob Pan jacob.jun.pan@linux.intel.com 2013-10-17T17:28:35+00:00 2d281d8196e38dd3a4ee9af26621ddde8329f269 The Intel Running Average Power Limit (RAPL) technology provides platform software with the ability to monitor, control, and get notifications on power usage. This feature is present in all Sandy Bridge and later Intel processors. Newer models allow more fine grained controls to be applied. In RAPL, power control is divided into domains, which include package, DRAM controller, CPU core (Power Plane 0), graphics uncore (power plane 1), etc. The purpose of this driver is to expose the RAPL settings to userspace. Overall, RAPL fits in the new powercap class driver in that platform level power capping controls are exposed via this generic interface. This driver is based on an earlier patch from Zhang Rui. However, while the previous work was mainly focused on thermal monitoring the focus here is on the usability from user space perspective. References: https://lkml.org/lkml/2011/5/26/93 Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com> Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> 
The Intel Running Average Power Limit (RAPL) technology provides platform
software with the ability to monitor, control, and get notifications on
power usage.

This feature is present in all Sandy Bridge and later Intel processors.
Newer models allow more fine grained controls to be applied.  In RAPL,
power control is divided into domains, which include package, DRAM
controller, CPU core (Power Plane 0), graphics uncore (power plane 1), etc.

The purpose of this driver is to expose the RAPL settings to userspace.
Overall, RAPL fits in the new powercap class driver in that platform
level power capping controls are exposed via this generic interface.

This driver is based on an earlier patch from Zhang Rui.

However, while the previous work was mainly focused on thermal monitoring
the focus here is on the usability from user space perspective.

References: https://lkml.org/lkml/2011/5/26/93
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
PowerCap: Add class driver 2013-10-16T22:36:06+00:00 Srinivas Pandruvada srinivas.pandruvada@linux.intel.com 2013-10-11T23:54:56+00:00 75d2364ea0cab3a95be3f8d1f8dabd20ac4b1b2a The power capping framework providing a consistent interface between the kernel and user space that allows power capping drivers to expose their settings to user space in a uniform way. The overall design of the framework is described in the documentation added by the previous patch in this series. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com> Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> 
The power capping framework providing a consistent interface between the
kernel and user space that allows power capping drivers to expose their
settings to user space in a uniform way.
The overall design of the framework is described in the documentation
added by the previous patch in this series.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>