i7300_idle driver v1.55

The Intel 7300 Memory Controller supports dynamic throttling of memory which can
be used to save power when system is idle. This driver does the memory
throttling when all CPUs are idle on such a system.

Refer to "Intel 7300 Memory Controller Hub (MCH)" datasheet
for the config space description.

Signed-off-by: Andy Henroid <andrew.d.henroid@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/drivers/idle/Kconfig b/drivers/idle/Kconfig
new file mode 100644
index 00000000000..f5b26dd579e
--- /dev/null
+++ b/drivers/idle/Kconfig
@@ -0,0 +1,16 @@
+
+menu "Memory power savings"
+
+config I7300_IDLE_IOAT_CHANNEL
+        bool
+
+config I7300_IDLE
+        tristate "Intel chipset idle power saving driver"
+        select I7300_IDLE_IOAT_CHANNEL
+        depends on X86_64
+        help
+          Enable idle power savings with certain Intel server chipsets.
+          The chipset must have I/O AT support, such as the Intel 7300.
+          The power savings depends on the type and quantity of DRAM devices.
+
+endmenu