PM / devfreq: Add sysfs node to expose available governors

Now that governor list can be variable, knowing the available governors
is useful to be able to select a governor using relevant sysfs node.

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

Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/Documentation/ABI/testing/sysfs-class-devfreq b/Documentation/ABI/testing/sysfs-class-devfreq
index 66876debca18..0ba6ea2f89d9 100644
--- a/Documentation/ABI/testing/sysfs-class-devfreq
+++ b/Documentation/ABI/testing/sysfs-class-devfreq
@@ -71,3 +71,10 @@ Description:
                 the available frequencies of the corresponding devfreq object.
                 This is a snapshot of available frequencies and not limited
                 by the min/max frequency restrictions.
+
+What:           /sys/class/devfreq/.../available_governors
+Date:           October 2012
+Contact:        Nishanth Menon <nm@ti.com>
+Description:
+                The /sys/class/devfreq/.../available_governors shows
+                currently available governors in the system.