git: acpi/cstate: Allow request deeper C-state, even it has no _CST entry

[Sepherosa Ziehau]

commit 1d7303387db62491e19fc66b2b6a54489e361ec0
Author: Sepherosa Ziehau <sephe at dragonflybsd.org>
Date:   Sun Jan 12 16:54:45 2014 +0800

    acpi/cstate: Allow request deeper C-state, even it has no _CST entry
    
    On laptop, BIOS may unveil more C-states if power cable is unplugged,
    which means if you want to use these deeper C-states you will have to
    re-adjust C-state sysctls.  This commit automates this kind of
    "re-adjust".  Read-only sysctl nodes hw.acpi.cpuX.cx_lowest_use and
    hw.acpi.cpu.cx_lowest_use are introduced to show the current deepest
    C-state could be used.

Summary of changes:
 sys/dev/acpica/acpi_cpu_cstate.c | 76 ++++++++++++++++++++++++++++++++++++----
 1 file changed, 69 insertions(+), 7 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/1d7303387db62491e19fc66b2b6a54489e361ec0


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