Messages in this thread | | | From | Nishanth Menon <> | Subject | [linux-next PATCH 0/7] PM / devfreq: allow governors to be modules and switch dynamically | Date | Mon, 29 Oct 2012 15:01:41 -0500 |
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The following series is based on: linux-next e083feb Merge branch 'acpi-next' into linux-next from git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git In addition, this series depends on the following to apply cleanly: https://patchwork.kernel.org/patch/1649621/ https://patchwork.kernel.org/patch/1663331/
This series allows the devfreq governors to be built as modules and switched on the fly using sysfs controls (inspired by cpufreq's ability to do the same).
Tested on BeagleBoard XM(3730) with dummy driver[1]:
/sys/devices/platform/iva.0/devfreq/iva.0 # ls available_frequencies governor power available_governors max_freq subsystem cur_freq min_freq target_freq device polling_interval uevent /sys/devices/platform/iva.0/devfreq/iva.0 # cat available_governors simple_ondemand /sys/devices/platform/iva.0/devfreq/iva.0 # modprobe governor_userspace /sys/devices/platform/iva.0/devfreq/iva.0 # cat available_governors userspace simple_ondemand /sys/devices/platform/iva.0/devfreq/iva.0 # /sys/devices/platform/iva.0/devfreq/iva.0 # echo -n "userspace">governor /sys/devices/platform/iva.0/devfreq/iva.0 # ls available_frequencies max_freq target_freq available_governors min_freq uevent cur_freq polling_interval userspace device power governor subsystem /sys/devices/platform/iva.0/devfreq/iva.0 # cat governor userspace /sys/devices/platform/iva.0/devfreq/iva.0 # echo -n "simple_ondemand">governor /sys/devices/platform/iva.0/devfreq/iva.0 # cat governor simple_ondemand /sys/devices/platform/iva.0/devfreq/iva.0 # ls available_frequencies governor power available_governors max_freq subsystem cur_freq min_freq target_freq device polling_interval uevent
Nishanth Menon (7): PM / devfreq: export update_devfreq PM / devfreq: provide hooks for governors to be registered PM / devfreq: register governors with devfreq framework PM / devfreq: map devfreq drivers to governor using name PM / devfreq: governors: add GPL module license and allow module build PM / devfreq: allow sysfs governor node to switch governor PM / devfreq: Add sysfs node to expose available governors
Documentation/ABI/testing/sysfs-class-devfreq | 9 +- drivers/devfreq/Kconfig | 8 +- drivers/devfreq/devfreq.c | 249 ++++++++++++++++++++++++- drivers/devfreq/exynos4_bus.c | 2 +- drivers/devfreq/governor.h | 4 + drivers/devfreq/governor_performance.c | 22 ++- drivers/devfreq/governor_powersave.c | 22 ++- drivers/devfreq/governor_simpleondemand.c | 22 ++- drivers/devfreq/governor_userspace.c | 22 ++- include/linux/devfreq.h | 24 +-- 10 files changed, 348 insertions(+), 36 deletions(-)
Cc: Rajagopal Venkat <rajagopal.venkat@linaro.org> Cc: MyungJoo Ham <myungjoo.ham@samsung.com> Cc: Kyungmin Park <kyungmin.park@samsung.com> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Kevin Hilman <khilman@ti.com> Cc: linux-pm@vger.kernel.org Cc: linux-kernel@vger.kernel.org
[1] http://pastebin.pandaboard.org/index.php/view/85100576
Regards, Nishanth Menon -- 1.7.9.5
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