cpufreq: interactive: Boost frequency on touchscreen input

Based on previous patches by Tero Kristo <tero.kristo@nokia.com>,
Brian Steuer <bsteuer@codeaurora.org>,
David Ng <dave@codeaurora.org>,
Antti P Miettinen <amiettinen@nvidia.com>, and
Thomas Renninger <trenn@suse.de>

Change-Id: Ic55fedcf6f9310f43a7022fb88e23b0392122769
Signed-off-by: Todd Poynor <toddpoynor@google.com>
diff --git a/Documentation/cpu-freq/governors.txt b/Documentation/cpu-freq/governors.txt
index 40894da..4172cad 100644
--- a/Documentation/cpu-freq/governors.txt
+++ b/Documentation/cpu-freq/governors.txt
@@ -264,6 +264,9 @@
 timer_rate: Sample rate for reevaluating cpu load when the system is
 not idle.  Default is 20000 uS.
 
+input_boost: If non-zero, boost speed of all CPUs to hispeed_freq on
+touchscreen activity.  Default is 0.
+
 
 3. The Governor Interface in the CPUfreq Core
 =============================================