]> nv-tegra.nvidia Code Review - linux-3.10.git/commit
[IA64] Add ACPI based P-state support
authorVenkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Fri, 29 Jul 2005 23:15:00 +0000 (16:15 -0700)
committerTony Luck <tony.luck@intel.com>
Fri, 26 Aug 2005 22:09:24 +0000 (15:09 -0700)
commit4db8699bcfa8faddb5727b1cb010a4d9b8a42e8c
treeeb4cb14927ed9cf4507f875cd69fe35f87b3b3bc
parentfd589e0b662c1ea8cfb1e0d20d60a2510979865b
[IA64] Add ACPI based P-state support

Patch to support P-state transitions on ia64. This driver is based on ACPI,
and uses the ACPI processor driver interface to find out the P-state support
information for the processor. This driver plugs into generic cpufreq
infrastructure.

Once this driver is loaded successfully, ondemand/userspace governor can be
used to change the CPU frequency dynamically based on load or on request from
userspace process.

Refer :
ACPI specification -
      http://www.acpi.info
P-state related PAL calls -
      http://developer.intel.com/design/itanium/downloads/24869909.pdf

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
arch/ia64/Kconfig
arch/ia64/kernel/Makefile
arch/ia64/kernel/cpufreq/Kconfig [new file with mode: 0644]
arch/ia64/kernel/cpufreq/Makefile [new file with mode: 0644]
arch/ia64/kernel/cpufreq/acpi-cpufreq.c [new file with mode: 0644]
include/asm-ia64/acpi.h
include/asm-ia64/pal.h