linux/drivers
Zhang Rui d9460fd227 ACPI: register ACPI Processor as generic thermal cooling device
Register ACPI processor as thermal cooling devices.
A combination of processor T-state and P-state are used for thermal throttling.
the processor will reduce the frequency first and then set the T-state.

we use cpufreq_thermal_reduction_pctg to calculate the cpufreq limit,
and call cpufreq_verify_with_limit to set the cpufreq limit.
if cpufreq driver is loaded, then we have four cooling state for cpufreq control.
cooling state 0: cpufreq limit == max_freq
cooling state 1: cpufreq limit == max_freq * 80%
cooling state 2: cpufreq limit == max_freq * 60%
cooling state 3: cpufreq limit == max_freq * 40%

after the cpufreq limit is set to 40 percentage of the max_freq,
we use T-state for cooling.

eg. a processor has P-state support, and it has 8 T-state (T0-T7),
the max_state of the proceesor is 10:

state	cpufreq-limit  T-state
0:	max_freq	T0
1:	max_freq * 80%	T0
2:	max_freq * 60%	T0
3:	max_freq * 40%	T0
4:	max_freq * 40%	T1
5:	max_freq * 40%	T2
6:	max_freq * 40%	T3
7:	max_freq * 40%	T4
8:	max_freq * 40%	T5
9:	max_freq * 40%	T6
10:	max_freq * 40%	T7

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Signed-off-by: Thomas Sujith <sujith.thomas@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-02-01 23:18:19 -05:00
..
acorn/char
acpi ACPI: register ACPI Processor as generic thermal cooling device 2008-02-01 23:18:19 -05:00
amba
ata Blackfin pata-bf54x driver: fix compiling bug - no ata_port struct in struct ata_device any more 2008-02-01 12:26:43 -05:00
atm [ATM]: [he] fixing compilation when you define USE_RBPS_POOL/USE_RBPL_POOL 2008-01-28 15:00:15 -08:00
auxdisplay
base Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-2.6 2008-01-31 09:31:37 +11:00
block block/sunvdc.c:print_version() must be __devinit 2008-02-01 09:26:32 +01:00
bluetooth
cdrom ide-cd: move lba_to_msf() and msf_to_lba() to <linux/cdrom.h> 2008-02-01 23:09:24 +01:00
char [AUDIT] add session id to audit messages 2008-02-01 14:06:51 -05:00
clocksource
connector [NETNS]: Consolidate kernel netlink socket destruction. 2008-01-28 15:08:07 -08:00
cpufreq cpufreq: fix obvious condition statement error 2008-01-30 13:33:34 +01:00
cpuidle
crypto [S390] crypto: move s390 Kconfig options. 2008-01-26 14:11:17 +01:00
dca
dio
dma
edac Merge branch 'linux-2.6' 2008-01-31 11:25:51 +11:00
eisa
firewire firewire: fw-sbp2: Use sbp2 device-provided mgt orb timeout for logins 2008-01-30 22:22:29 +01:00
firmware x86: left over fix for leak of early_ioremp in dmi_scan 2008-01-30 13:33:32 +01:00
hid HID: ADS/Tech Radio si470x needs blacklist entry 2008-01-28 14:51:23 +01:00
hwmon
i2c Merge branch 'orion' into devel 2008-01-28 13:21:30 +00:00
ide ide: move hwif_register() call out of ide_probe_port() 2008-02-01 23:09:36 +01:00
ieee1394 ieee1394: ohci1394: don't schedule IT tasklets on IR events 2008-01-30 22:22:21 +01:00
infiniband [SCSI] remove use_sg_chaining 2008-01-30 13:14:02 -06:00
input [ALSA] Remove sound/driver.h 2008-01-31 17:29:48 +01:00
isdn
leds
lguest lguest: fix mis-merge against hpa's TSS renaming 2008-01-31 19:59:44 +11:00
macintosh Merge branch 'linux-2.6' 2008-01-31 11:25:51 +11:00
mca
md
media [ALSA] Remove sound/driver.h 2008-01-31 17:29:48 +01:00
message blk_end_request: changing i2o_block (take 4) 2008-01-28 10:36:50 +01:00
mfd [ARM] Fix class_device damage caused by 0c55445f20 2008-01-28 10:59:09 +00:00
misc
mmc Merge branch 'blk-end-request' of git://git.kernel.dk/linux-2.6-block 2008-01-29 08:51:32 +11:00
mtd
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2008-02-01 21:06:29 +11:00
nubus
of
oprofile
parisc [PARISC]: Fix build after ipv4_is_*() changes. 2008-01-28 14:58:20 -08:00
parport
pci pci: allow multiple calls to pcim_enable_device() 2008-02-01 12:26:44 -05:00
pcmcia [ARM] pxa: move memory controller registers into pxa2xx-regs.h 2008-01-26 15:07:54 +00:00
pnp git-x86: drivers/pnp/pnpbios/bioscalls.c build fix 2008-01-30 13:32:31 +01:00
power
ps3
rapidio Merge branch 'linux-2.6' 2008-01-31 11:25:51 +11:00
rtc Merge git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6 2008-01-29 08:52:50 +11:00
s390 [SCSI] zfcp: fix sense_buffer access bug 2008-01-30 13:03:39 -06:00
sbus
scsi ide: update/add my Copyrights 2008-02-01 23:09:33 +01:00
serial m68knommu: use container_of in mcf.c 2008-02-01 21:00:01 +11:00
sh
sn
spi Merge branch 'linux-2.6' 2008-01-31 11:25:51 +11:00
ssb ssb: Add boardflags_hi field to the sprom data structure 2008-01-28 15:09:52 -08:00
tc
telephony
thermal the generic thermal sysfs driver 2008-02-01 23:12:19 -05:00
uio
usb [ALSA] Remove sound/driver.h 2008-01-31 17:29:48 +01:00
video x86: cpa: move flush to cpa 2008-01-30 13:34:07 +01:00
virtio
w1 i2c: normal_i2c can be made const (remaining drivers) 2008-01-27 18:14:47 +01:00
watchdog [WATCHDOG] use SGI_HAS_INDYDOG for INDYDOG depends 2008-01-29 12:58:38 +00:00
xen
zorro
Kconfig the generic thermal sysfs driver 2008-02-01 23:12:19 -05:00
Makefile the generic thermal sysfs driver 2008-02-01 23:12:19 -05:00