cpufreq: ARM big LITTLE: Add generic cpufreq driver and its DT glue

big LITTLE is ARM's new Architecture focussing power/performance needs of modern
world. More information about big LITTLE can be found here:

http://www.arm.com/products/processors/technologies/biglittleprocessing.php
http://lwn.net/Articles/481055/

In order to keep cpufreq support for all big LITTLE platforms simple/generic,
this patch tries to add a generic cpufreq driver layer for all big LITTLE
platforms.

The driver is divided into two parts:
- Core driver: Generic and shared across all big LITTLE SoC's
- Glue drivers: Per platform drivers providing ops to the core driver

This patch adds in a generic glue driver which would extract information from
Device Tree.

Future SoC's can either reuse the DT glue or write their own depending on the
need.

Signed-off-by: Sudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/MAINTAINERS b/MAINTAINERS
index 74e58a4d035b..be739837d6c3 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2206,6 +2206,17 @@ S:	Maintained
 F:      drivers/cpufreq/
 F:      include/linux/cpufreq.h
 
+CPU FREQUENCY DRIVERS - ARM BIG LITTLE
+M:      Viresh Kumar <viresh.kumar@linaro.org>
+M:      Sudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com>
+L:      cpufreq@vger.kernel.org
+L:      linux-pm@vger.kernel.org
+W:      http://www.arm.com/products/processors/technologies/biglittleprocessing.php
+S:      Maintained
+F:      drivers/cpufreq/arm_big_little.h
+F:      drivers/cpufreq/arm_big_little.c
+F:      drivers/cpufreq/arm_big_little_dt.c
+
 CPUID/MSR DRIVER
 M:      "H. Peter Anvin" <hpa@zytor.com>
 S:      Maintained