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* eeprom_93cx6: shorten pulse timing to match spec (bis)Francois Romieu2007-07-101-3/+3
| | | | | | | | | Based on an original idea by John W. Linville. It is the missing part of 42d45ccd60636c28e35c2016f091783bc14ad99c Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [PATCH] eeprom_93cx6: shorten pulse timing to match specJohn W. Linville2007-07-081-3/+3
| | | | | | | | | | | 93cx6 datasheet available here: http://ww1.microchip.com/downloads/en/DeviceDoc/21749F.pdf Figure 1-1 and Table 1-2 on pages 4-5 indicate that both Clock High Time and Clock Low Time have largest minimum times of 450ns. Signed-off-by: John W. Linville <linville@tuxdriver.com>
* [PATCH] eeprom_93cx6: Add comment for 1us delay after pulseIvo van Doorn2007-07-081-0/+12
| | | | | | | | | This will add a comment for the 1us delay which is taken after the pulse has been switched. The 1us delay is based on the specifications so that should be made clear. Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* [PATCH] Add 93cx6 eeprom libraryIvo van Doorn2007-07-083-1/+235
| | | | | | | This patch adds a library for reading from 93cx6 eeproms. Signed-off-by: Michael Wu <flamingice@sourmilk.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* Remove the blink driverLinus Torvalds2007-07-043-54/+0
| | | | | | | | | | | | | Yeah, we could have just disabled it, but there's work on a new one that isn't as fundamentally broken, so there really doesn't seem to be any point in keeping it around. The recent timer cleanup broke the only valid use, and when I say "valid", I obviously mean "totally broken". So it's not like it works, or really even can work in the current format that uses the unsafe "panic" LED blinking routines.. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* blink driver power savingStephen Hemminger2007-07-011-2/+20
| | | | | | | | | | The blink driver wakes up every jiffies which wastes power unnecessarily. Using a notifier gives same effect. Also add ability to unload module. Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org> [ We should really just delete the whole thing. The blink driver is broken in many other ways too -Linus ] Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Pull now into release branchLen Brown2007-06-022-16/+7
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| * ACPI: thinkpad-acpi: do not use named sysfs groupsHenrique de Moraes Holschuh2007-05-312-16/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The initial version of the thinkpad-acpi sysfs interface (not yet released in any stable mainline kernel) made liberal use of named sysfs groups, in order to get the attributes more organized. This proved to be a really bad design decision. Maybe if attribute groups were as flexible as a real directory, and if binary attributes were not second-class citizens, the idea of subdirs and named groups would not have been so bad. This patch makes all the thinkpad-acpi sysfs groups anonymous (thus removing the subdirs), adds the former group names as a prefix (so that hotkey/enable becomes hotkey_enable for example), and updates the documentation. These changes will make the thinkpad-acpi sysfs ABI a lot easier to maintain. Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Signed-off-by: Len Brown <len.brown@intel.com>
* | misc/tifm_7xx1: replace deprecated irq flagJeff Garzik2007-06-011-1/+1
|/ | | | | | | Signed-off-by: Jeff Garzik <jeff@garzik.org> Cc: Alex Dubov <oakad@yahoo.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Misc: phantom, take care of pci postingJiri Slaby2007-05-231-1/+10
| | | | | | | | | | phantom, take care of pci posting thanks to akpm for pointing this out Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* phantom: move to unlocked_ioctlJiri Slaby2007-05-231-4/+14
| | | | | | | | | phantom's ioctl is often (4000 times a sec or so) invoked, don't acquire BKL and block other processes. Signed-off-by: Jiri Slaby <xslaby@phantom.fi.muni.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Pull misc-for-upstream into release branchLen Brown2007-05-101-6/+6
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| * acpi,msi-laptop: Fall back to EC polling mode for MSI laptop specific EC ↵Lennart Poettering2007-05-101-6/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | commands The ACPI EC that is used in MSI laptops knows some non-standard commands for changing the screen brighntess and a few other things, which are used by the msi-laptop.c driver. Unfortunately for these commands no GPE events for IBF and OBF are triggered. Since nowadays the EC code uses the ec_intr=1 mode by default, this causes these operations to timeout, although they don't fail. In result, all operations that you can do with the msi-laptop.c driver take more or less 1s to complete, which is awfully slow. In one of the more recent kernels (2.6.20?) the EC subsystem has been revamped. With that change the EC timeout has been increased. before that increase the MSI EC accesses were slow -- but not *that* slow, hence I took notice of this limitation of the MSI EC hardware only very recently. The standard EC operations on the MSI EC as defined in the ACPI spec support GPE events properly. The following patch adds a new argument "force_poll" to the ec_transaction() function (and friends). If set to 1, the function will poll for IBF/OBF even if ec_intr=1 is enabled. If set to 0 the current behaviour is used. The msi-laptop driver is modified to make use of this new flag, so that OBF/IBF is polled for the special MSI EC transactions -- but only for them. Signed-off-by: Lennart Poettering <mzxreary@0pointer.de> Acked-by: Alexey Starikovskiy <aystarik@gmail.com> Signed-off-by: Len Brown <len.brown@intel.com>
* | Pull misc-for-upstream into release branchLen Brown2007-05-102-5/+5
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| * sony-laptop: rename SONY_LAPTOP_OLD to a more meaningful SONYPI_COMPATMattia Dongili2007-05-102-5/+5
| | | | | | | | | | Signed-off-by: Mattia Dongili <malattia@linux.it> Signed-off-by: Len Brown <len.brown@intel.com>
* | asus-laptop: version bump and lindentCorentin Chary2007-05-101-14/+15
| | | | | | | | | | | | | | Version bump, lindent, etc .. Signed-off-by: Corentin Chary <corentincj@iksaif.net> Signed-off-by: Len Brown <len.brown@intel.com>
* | asus-laptop: fix light sens initCorentin Chary2007-05-101-1/+1
| | | | | | | | | | | | | | Fix a stupid light sens detection bug. Signed-off-by: Corentin Chary <corentincj@iksaif.net> Signed-off-by: Len Brown <len.brown@intel.com>
* | asus-laptop: add GPS supportCorentin Chary2007-05-101-1/+54
| | | | | | | | | | | | | | | | Just adds GPS support found in R2H thanks to Sam Lin. It will make a "gps" file in /sys/devices/platform/asus-laptop/. Signed-off-by: Corentin Chary <corentincj@iksaif.net> Signed-off-by: Len Brown <len.brown@intel.com>
* | asus-laptop: notify ALL eventsCorentin Chary2007-05-101-2/+2
|/ | | | | | | We need to handle all events, because some dsdt use events >= 0x80 Signed-off-by: Corentin Chary <corentincj@iksaif.net> Signed-off-by: Len Brown <len.brown@intel.com>
* disable socket power in adapter driver instead of media oneAlex Dubov2007-05-081-3/+24
| | | | | | | | | Socket power must be fully controlled by adapter driver. This also prevents unnecessary power-off of the socket when media driver is unloaded, yet media remains in the socket. Signed-off-by: Alex Dubov <oakad@yahoo.com> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
* Misc: add sensable phantom driverJiri Slaby2007-05-083-0/+473
| | | | | | | | Add sensable phantom driver Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Add keyboard blink driverAndi Kleen2007-05-083-0/+37
| | | | | | | | | Simple driver that blinks the keyboard LEDs when loaded. Useful for checking that the kernel is still alive or for crashdumping Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'for-linus' of ↵Linus Torvalds2007-05-042-314/+323
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc: (46 commits) mmc-omap: Clean up omap set_ios and make MMC_POWER_ON work mmc-omap: Fix omap to use MMC_POWER_ON mmc-omap: add missing '\n' mmc: make tifm_sd_set_dma_data() static mmc: remove old card states mmc: support unsafe resume of cards mmc: separate out reading EXT_CSD mmc: break apart switch function MMC: Fix handling of low-voltage cards MMC: Consolidate voltage definitions mmc: add bus handler wbsd: check for data opcode earlier mmc: Separate out protocol ops mmc: Move core functions to subdir mmc: deprecate mmc bus topology mmc: remove card upon suspend mmc: allow suspended block driver to be removed mmc: Flush pending detects on host removal mmc: Move host and card drivers to subdirs mmc: Move queue functions to mmc_block ...
| * tifm: add missing include for DMA_32BIT_MASKAndrew Morton2007-05-011-0/+1
| | | | | | | | | | | | | | | | | | | | sparc64: drivers/misc/tifm_7xx1.c: In function `tifm_7xx1_probe': drivers/misc/tifm_7xx1.c:294: error: `DMA_32BIT_MASK' undeclared Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
| * tifm: layout fixes, small changes to comments and printfsAlex Dubov2007-05-012-19/+15
| | | | | | | | | | | | | | Cosmetic changes to the code. Signed-off-by: Alex Dubov <oakad@yahoo.com> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
| * tifm: add sysfs attribute for tifm devicesAlex Dubov2007-05-011-7/+20
| | | | | | | | | | | | | | A sysfs attribute reflecting current media type is added. Signed-off-by: Alex Dubov <oakad@yahoo.com> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
| * tifm_7xx1: fix adapter resume functionAlex Dubov2007-05-011-27/+31
| | | | | | | | | | | | | | | | | | | | Fixes to the adapter resume function to correctly handle all possible cases: 1. Card is removed during suspend 2. Card is inserted during suspend into previously empty socket 3. Card is replaced during suspend by same or different media type card. Signed-off-by: Alex Dubov <oakad@yahoo.com> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
| * tifm: move common device management tasks from tifm_7xx1 to tifm_coreAlex Dubov2007-05-012-71/+62
| | | | | | | | | | | | | | | | Some details of the device management (create, add, remove) are really belong to the tifm_core, as they are not hardware specific. Signed-off-by: Alex Dubov <oakad@yahoo.com> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
| * tifm: move common adapter management tasks from tifm_7xx1 to tifm_coreAlex Dubov2007-05-012-39/+41
| | | | | | | | | | | | | | | | Some details of the adapter management (create, add, remove) are really belong to the tifm_core, as they are not hardware specific. Signed-off-by: Alex Dubov <oakad@yahoo.com> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
| * tifm_7xx1: improve card detection routineAlex Dubov2007-05-011-25/+21
| | | | | | | | | | | | | | | | Remove unneeded conditions and change a sleeping regime a little in the card type detection routine. Signed-off-by: Alex Dubov <oakad@yahoo.com> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
| * tifm: replace per-adapter kthread with freezeable workqueueAlex Dubov2007-05-012-72/+68
| | | | | | | | | | | | | | | | | | Freezeable workqueue makes sure that adapter work items (device insertions and removals) would be handled after the system is fully resumed. Previously this was achieved by explicit freezing of the kthread. Signed-off-by: Alex Dubov <oakad@yahoo.com> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
| * tifm: simplify bus match and uevent handlersAlex Dubov2007-05-012-30/+41
| | | | | | | | | | | | | | | | Remove code duplicating the kernel functionality and clean up data structures involved in driver matching. Signed-off-by: Alex Dubov <oakad@yahoo.com> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
| * tifm: use bus methods to handle probe/remove instead of driver ones.Alex Dubov2007-05-011-55/+47
| | | | | | | | | | Signed-off-by: Alex Dubov <oakad@yahoo.com> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
| * tifm: hide details of interrupt processing from socket driversAlex Dubov2007-05-012-13/+20
| | | | | | | | | | | | | | | | | | Instead of passing transformed value of adapter interrupt status to socket drivers, implement two separate callbacks - one for card events and another for dma events. Signed-off-by: Alex Dubov <oakad@yahoo.com> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
* | PCI: Cleanup the includes of <linux/pci.h>Jean Delvare2007-05-022-2/+0
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I noticed that many source files include <linux/pci.h> while they do not appear to need it. Here is an attempt to clean it all up. In order to find all possibly affected files, I searched for all files including <linux/pci.h> but without any other occurence of "pci" or "PCI". I removed the include statement from all of these, then I compiled an allmodconfig kernel on both i386 and x86_64 and fixed the false positives manually. My tests covered 66% of the affected files, so there could be false positives remaining. Untested files are: arch/alpha/kernel/err_common.c arch/alpha/kernel/err_ev6.c arch/alpha/kernel/err_ev7.c arch/ia64/sn/kernel/huberror.c arch/ia64/sn/kernel/xpnet.c arch/m68knommu/kernel/dma.c arch/mips/lib/iomap.c arch/powerpc/platforms/pseries/ras.c arch/ppc/8260_io/enet.c arch/ppc/8260_io/fcc_enet.c arch/ppc/8xx_io/enet.c arch/ppc/syslib/ppc4xx_sgdma.c arch/sh64/mach-cayman/iomap.c arch/xtensa/kernel/xtensa_ksyms.c arch/xtensa/platform-iss/setup.c drivers/i2c/busses/i2c-at91.c drivers/i2c/busses/i2c-mpc.c drivers/media/video/saa711x.c drivers/misc/hdpuftrs/hdpu_cpustate.c drivers/misc/hdpuftrs/hdpu_nexus.c drivers/net/au1000_eth.c drivers/net/fec_8xx/fec_main.c drivers/net/fec_8xx/fec_mii.c drivers/net/fs_enet/fs_enet-main.c drivers/net/fs_enet/mac-fcc.c drivers/net/fs_enet/mac-fec.c drivers/net/fs_enet/mac-scc.c drivers/net/fs_enet/mii-bitbang.c drivers/net/fs_enet/mii-fec.c drivers/net/ibm_emac/ibm_emac_core.c drivers/net/lasi_82596.c drivers/parisc/hppb.c drivers/sbus/sbus.c drivers/video/g364fb.c drivers/video/platinumfb.c drivers/video/stifb.c drivers/video/valkyriefb.c include/asm-arm/arch-ixp4xx/dma.h sound/oss/au1550_ac97.c I would welcome test reports for these files. I am fine with removing the untested files from the patch if the general opinion is that these changes aren't safe. The tested part would still be nice to have. Note that this patch depends on another header fixup patch I submitted to LKML yesterday: [PATCH] scatterlist.h needs types.h http://lkml.org/lkml/2007/3/01/141 Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Badari Pulavarty <pbadari@us.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Pull thinkpad into release branchLen Brown2007-04-284-0/+4936
|\ | | | | | | | | | | | | | | Conflicts: drivers/misc/Kconfig Signed-off-by: Len Brown <len.brown@intel.com>
| * thinkpad-acpi: make drivers/misc/thinkpad_acpi:fan_mutex staticAdrian Bunk2007-04-281-1/+1
| | | | | | | | | | | | | | | | This patch makes the needlessly global fan_mutex static. Signed-off-by: Adrian Bunk <bunk@stusta.de> Acked-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Signed-off-by: Len Brown <len.brown@intel.com>
| * ACPI: thinkpad-acpi: add sysfs support to wan and bluetooth subdriversHenrique de Moraes Holschuh2007-04-282-12/+136
| | | | | | | | | | | | | | Add support to sysfs to the wan and bluetooth subdrivers. Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Signed-off-by: Len Brown <len.brown@intel.com>
| * ACPI: thinkpad-acpi: add sysfs support to hotkey subdriverHenrique de Moraes Holschuh2007-04-282-0/+129
| | | | | | | | | | | | | | Add the hotkey sysfs support. Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Signed-off-by: Len Brown <len.brown@intel.com>
| * ACPI: thinkpad-acpi: improve dock subdriver initializationHenrique de Moraes Holschuh2007-04-281-28/+50
| | | | | | | | | | | | | | | | | | | | The dock sub-driver has split-personality (two subdrivers), and it was doing some unoptimal things on init because of that. Fix it so that the second half of it will only init when necessary, and only if the first half initialized sucessfully in the first place. Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Signed-off-by: Len Brown <len.brown@intel.com>
| * ACPI: thinkpad-acpi: improve debugging for acpi helpersHenrique de Moraes Holschuh2007-04-281-11/+20
| | | | | | | | | | | | | | | | Some issues with the dock subdriver proved that a slightly improved debugging setup for ACPI notifiers and handler helpers would be useful. Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Signed-off-by: Len Brown <len.brown@intel.com>
| * ACPI: thinkpad-acpi: map ENXIO to EINVAL for fan sysfsHenrique de Moraes Holschuh2007-04-281-2/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | Currently, all fan control operations return ENXIO if unsupported operations are requested, but return EINVAL if invalid fan modes are requested on a given ThinkPad. This is not strictly correct for sysfs, so map ENXIO to EINVAL in the sysfs attribute store handlers, as we do benefit from the ENXIO in other parts of the driver code. Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Signed-off-by: Len Brown <len.brown@intel.com>
| * ACPI: thinkpad-acpi: fix a fan watchdog invocationHenrique de Moraes Holschuh2007-04-281-2/+3
| | | | | | | | | | | | | | | | The fan control watchdog was being called in one place even when the fan control operation had failed. Fix it. Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Signed-off-by: Len Brown <len.brown@intel.com>
| * ACPI: thinkpad-acpi: do not arm fan watchdog if it would not workHenrique de Moraes Holschuh2007-04-281-0/+3
| | | | | | | | | | | | | | | | Do not enable/rearm the fan control safety watchdog if we would not be able to do anything to the fan anyway. Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Signed-off-by: Len Brown <len.brown@intel.com>
| * ACPI: thinkpad-acpi: add a fan-control feature master toggleHenrique de Moraes Holschuh2007-04-282-1/+31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Len Brown considers that an active by default fan control interface in laptops may be too close to giving users enough rope. There is a good chance he is quite correct on this, especially if someone decides to use that interface in applets and users are not aware of its risks. This patch adds a master switch to thinkpad-acpi that enables or disables the entire fan-control feature as a module parameter: "fan_control". It defaults to disabled. Set it to non-zero to enable fan control. Also, the patch removes the expermiental status from fan control, since it is stable enough to not be called experimental, and the master switch makes it safe enough to do so. Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Signed-off-by: Len Brown <len.brown@intel.com>
| * ACPI: thinkpad-acpi: update brightness sysfs interface supportHenrique de Moraes Holschuh2007-04-252-2/+5
| | | | | | | | | | | | | | | | | | | | | | | | Update the brightness sysfs interface (done through the backlight class) to be in line with the rest of the thinkpad-acpi driver. This renames the incorrect, un-obvious, and clash-prone name of "ibm" for the backlight device to a much more fitting and descriptive "thinkpad_screen". This is something I wanted to do for quite a while... Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Signed-off-by: Len Brown <len.brown@intel.com>
| * ACPI: thinkpad-acpi: add sysfs support to the cmos command subdriverHenrique de Moraes Holschuh2007-04-251-0/+33
| | | | | | | | | | | | | | Add sysfs attributes to send ThinkPad CMOS commands. Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Signed-off-by: Len Brown <len.brown@intel.com>
| * ACPI: thinkpad-acpi: add a safety net for TPEC fan control modeHenrique de Moraes Holschuh2007-04-251-4/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The Linux ThinkPad community is not positive that all ThinkPads that do HFSP EC fan control do implement full-speed and auto modes, some of the earlier ones supporting HFSP might not. If the EC ignores the AUTO or FULL-SPEED bits, it will pay attention to the lower three bits that set the fan level. And as thinkpad-acpi was leaving these set to zero, it would stop(!) the fan, which is Not A Good Thing. So, as a safety net, we now make sure to also set the fan level part of the HFSP register to speed 7 for full-speed, and a minimum of speed 4 for auto mode. Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Signed-off-by: Len Brown <len.brown@intel.com>
| * ACPI: thinkpad-acpi: add sysfs support to fan subdriverHenrique de Moraes Holschuh2007-04-252-23/+309
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Export sysfs attributes to monitor and control the internal thinkpad fan (some thinkpads have more than one fan, but thinkpad-acpi doesn't support the second fan yet). The sysfs interface follows the hwmon design guide for fan devices. Also, fix some stray "thermal" files in the fan procfs description that have been there forever, and officially support "full-speed" as the name for the PWM-disabled state of the fan controller to keep it in line with the hwmon interface. It is much better a name for that mode than the unobvious "disengaged" anyway. Change the procfs interface to also accept full-speed as a fan level, but still report it as disengaged for backwards compatibility. Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Signed-off-by: Len Brown <len.brown@intel.com>
| * ACPI: thinkpad-acpi: add sysfs support to the thermal subdriverHenrique de Moraes Holschuh2007-04-252-1/+123
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Export thinkpad thermal sensors to sysfs, following the hwmon specification for thermal monitoring sensors. ThinkPad thermal monitoring is done by the EC. Sensors can show up or disappear at runtime when they are inside hotswappable hardware, such as batteries. Sensors that are not available return -ENXIO when accessed. Up to 16 thermal sensors are supported on new firmware (but nobody has reported a ThinkPad with more than 12 sensors so far), and 8 sensors are supported on older firmware. Thermal sensor mapping is model-specific. Precision varies, it is 1 degree Celcius on new ThinkPads, but higher on some older models. Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Signed-off-by: Len Brown <len.brown@intel.com>
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