ARM: OSIRIS: DVS (Dynamic Voltage Scaling) supoort.

Add a driver to provide DVS for the Simtec Osiris module to reduce
the power consumption whilst idling.

The DVS driver alters the voltage supplied to the ARM core depending
on the frequency it is running at. The driver itself does not do any
of the frequency alteration, which is left up to the cpufreq driver.

Signed-off-by: Ben Dooks <ben@simtec.co.uk>
Signed-off-by: Simtec Linux Team <linux@simtec.co.uk>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>

1 files changed, 13 insertions, 0 deletions

diff --git a/arch/arm/mach-s3c2440/Kconfig b/arch/arm/mach-s3c2440/Kconfig
index a8b69d77571b..cf10e14b7b49 100644
--- a/arch/arm/mach-s3c2440/Kconfig
+++ b/arch/arm/mach-s3c2440/Kconfig
@@ -53,6 +53,19 @@ config MACH_OSIRIS
           Say Y here if you are using the Simtec IM2440D20 module, also
           known as the Osiris.
 
+config MACH_OSIRIS_DVS
+        tristate "Simtec IM2440D20 (OSIRIS) Dynamic Voltage Scaling driver"
+        depends on MACH_OSIRIS
+        select TPS65010
+        help
+          Say Y/M here if you want to have dynamic voltage scaling support
+          on the Simtec IM2440D20 (OSIRIS) module via the TPS65011.
+
+          The DVS driver alters the voltage supplied to the ARM core
+          depending on the frequency it is running at. The driver itself
+          does not do any of the frequency alteration, which is left up
+          to the cpufreq driver.
+
 config MACH_RX3715
         bool "HP iPAQ rx3715"
         select CPU_S3C2440