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* [CPUFREQ] db8500: fix build error due to undeclared i variableAxel Lin2011-11-111-3/+3
| | | | | | | | | | | | | | | | | | | | | | The variable i is removed by commit ded8433 "[CPUFREQ] db8500: remove unneeded for loop iteration over freq_table", but current code to print available frequencies still uses the i variable. Thus add the i variable back to fix below buld error: CC drivers/cpufreq/db8500-cpufreq.o drivers/cpufreq/db8500-cpufreq.c: In function 'db8500_cpufreq_init': drivers/cpufreq/db8500-cpufreq.c:123: error: 'i' undeclared (first use in this function) drivers/cpufreq/db8500-cpufreq.c:123: error: (Each undeclared identifier is reported only once drivers/cpufreq/db8500-cpufreq.c:123: error: for each function it appears in.) make[2]: *** [drivers/cpufreq/db8500-cpufreq.o] Error 1 make[1]: *** [drivers/cpufreq] Error 2 make: *** [drivers] Error 2 This patch also fixes using uninitialized i variable as array index. Signed-off-by: Axel Lin <axel.lin@gmail.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Dave Jones <davej@redhat.com>
* Merge branch 'modsplit-Oct31_2011' of ↵Linus Torvalds2011-11-062-0/+2
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux * 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux: (230 commits) Revert "tracing: Include module.h in define_trace.h" irq: don't put module.h into irq.h for tracking irqgen modules. bluetooth: macroize two small inlines to avoid module.h ip_vs.h: fix implicit use of module_get/module_put from module.h nf_conntrack.h: fix up fallout from implicit moduleparam.h presence include: replace linux/module.h with "struct module" wherever possible include: convert various register fcns to macros to avoid include chaining crypto.h: remove unused crypto_tfm_alg_modname() inline uwb.h: fix implicit use of asm/page.h for PAGE_SIZE pm_runtime.h: explicitly requires notifier.h linux/dmaengine.h: fix implicit use of bitmap.h and asm/page.h miscdevice.h: fix up implicit use of lists and types stop_machine.h: fix implicit use of smp.h for smp_processor_id of: fix implicit use of errno.h in include/linux/of.h of_platform.h: delete needless include <linux/module.h> acpi: remove module.h include from platform/aclinux.h miscdevice.h: delete unnecessary inclusion of module.h device_cgroup.h: delete needless include <linux/module.h> net: sch_generic remove redundant use of <linux/module.h> net: inet_timewait_sock doesnt need <linux/module.h> ... Fix up trivial conflicts (other header files, and removal of the ab3550 mfd driver) in - drivers/media/dvb/frontends/dibx000_common.c - drivers/media/video/{mt9m111.c,ov6650.c} - drivers/mfd/ab3550-core.c - include/linux/dmaengine.h
| * cpufreq: Fix build of s3c64xx cpufreq driver for header changeMark Brown2011-10-311-0/+1
| | | | | | | | | | | | | | | | The header change has removed an implicit include of module.h, breaking the build due to the use of THIS_MODULE. Fix that. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
| * cpufreq: cpufreq_stats.c is a module, and should include module.hPaul Gortmaker2011-10-311-0/+1
| | | | | | | | | | | | | | So that we can clean up the header files and not be relying on implicit includes from device.h ---> module.h Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
* | Merge branch 'next' of git://github.com/kernelslacker/cpufreqLinus Torvalds2011-11-033-32/+268
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'next' of git://github.com/kernelslacker/cpufreq: [CPUFREQ] db8500: support all frequencies [CPUFREQ] db8500: remove unneeded for loop iteration over freq_table [CPUFREQ] ARM Exynos4210 PM/Suspend compatibility with different bootloaders [CPUFREQ] ARM: ux500: send cpufreq notification for all cpus [CPUFREQ] e_powersaver: Allow user to lower maximum voltage [CPUFREQ] e_powersaver: Check BIOS limit for CPU frequency [CPUFREQ] e_powersaver: Additional checks [CPUFREQ] exynos4210: Show list of available frequencies
| * | [CPUFREQ] db8500: support all frequenciesLinus Walleij2011-10-261-8/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This adds support for the 200 MHz frequency mode of the DB8500 SoC, and prints the available frequencies at init time. Cc: Vincent Guittot <vincent.guittot@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Dave Jones <davej@redhat.com>
| * | [CPUFREQ] db8500: remove unneeded for loop iteration over freq_tableAxel Lin2011-10-261-5/+0
| | | | | | | | | | | | | | | | | | | | | Don't know why to do the loop iteration here. It looks unneeded. Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Dave Jones <davej@redhat.com>
| * | [CPUFREQ] ARM Exynos4210 PM/Suspend compatibility with different bootloadersMyungJoo Ham2011-10-261-4/+102
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We have various bootloaders for Exynos4210 machines. Some of they set the ARM core frequency at boot time even when the boot is a resume from suspend-to-RAM. Such changes may create inconsistency in the data of CPUFREQ driver and have incurred hang issues with suspend-to-RAM. This patch enables to save and restore CPU frequencies with pm-notifier and sets the frequency at the initial (boot-time) value so that there wouldn't be any inconsistency between bootloader and kernel. This patch does not use CPUFREQ's suspend/resume callbacks because they are syscore-ops, which do not allow to use mutex that is being used by regulators that are used by the target function. This also prevents any CPUFREQ transitions during suspend-resume context, which could be dangerous at noirq-context along with regulator framework. Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Dave Jones <davej@redhat.com>
| * | [CPUFREQ] ARM: ux500: send cpufreq notification for all cpusVincent Guittot2011-10-261-3/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The same clock is used for all cpus so we must notify the frequency change for each one in order to update the configuration of all twd clockevents. change since V1: * use policy->cpus instead of cpu_online_mask Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org> Signed-off-by: Dave Jones <davej@redhat.com>
| * | [CPUFREQ] e_powersaver: Allow user to lower maximum voltageRafał Bilski2011-10-261-0/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add new module option "set_max_voltage". One of the lessons learned from Adaptive Powersaver is that voltage values returned by processor are for worst case scenario. But required voltage is changing with CPU temperature. And even processors produced in the same batch can have different minimum voltage necessary for stable work at specified frequency. On Elonex Webbook, once system starts, temperature never drops below 48 deg. C. Loading module after systems start allows user to lower CPU voltage and still have stable system. Sadly C7 doesn't allow code to set frequency or voltage from outside limits. If you ask it to set voltage lower then minimum it will ignore you. Thats why it isn't possible to change minimum voltage for minimum frequency too. Changing maximum voltage on Elonex Webbook leads to very good results. Looks like VIA C7 1.6GHz 1084mV can safetly run at 892mV. This means 83% of orginal value. If same percentage applies to power generated it means 12.5W in the place of 15W. Not much, but it is better then nothing. Only C7-M makes it possible. If voltage is too low by 16mV or more you will experience kernel panic. If voltage is too low by 32mV or more you will experience system freeze. Signed-off-by: Rafał Bilski <rafalbilski@interia.pl> Signed-off-by: Dave Jones <davej@redhat.com>
| * | [CPUFREQ] e_powersaver: Check BIOS limit for CPU frequencyRafał Bilski2011-10-261-0/+76
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Call ACPI function to get BIOS limit for CPU frequency. Fail if processor would like to run at higher frequency. Allow user to ignore BIOS limit. eps: Detected VIA Model D C7-M eps: Current voltage = 1084mV eps: Current multiplier = 16 eps: Highest voltage = 1084mV eps: Highest multiplier = 16 eps: Lowest voltage = 844mV eps: Lowest multiplier = 4 eps: ACPI limit 1.60GHz Signed-off-by: Rafał Bilski <rafalbilski@interia.pl> Signed-off-by: Dave Jones <davej@redhat.com>
| * | [CPUFREQ] e_powersaver: Additional checksRafał Bilski2011-10-261-11/+30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some systems are using 1,2Ghz@844mV processors running at 600MHz@796mV. Try to detect such systems and don't touch anything on it. If CPU doesn't have P-States in BIOS it should run at maximum frequency. Allow user to bypass checks by means of two new options. Don't set frequency to maximum on module unloading to avoid bada boom. It is also possible that some processors may have incorrect values in min/max registers caused by error in manufacturing process. Probably it would be BIOS job to set them to right frequency and P-States tables would have correct values inside. Two additional sanity checks for voltage. Signed-off-by: Rafał Bilski <rafalbilski@interia.pl> Signed-off-by: Dave Jones <davej@redhat.com>
| * | [CPUFREQ] exynos4210: Show list of available frequenciesDonggeun Kim2011-10-261-1/+22
| |/ | | | | | | | | | | | | | | | | | | This patch enables 'scaling_available_frequencies' attribute showing list of available frequencies. Signed-off-by: Donggeun Kim <dg77.kim@samsung.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com> Signed-off-by: KyungMin Park <kyungmin.park@samsung.com> Signed-off-by: Dave Jones <davej@redhat.com>
* | Merge branch 'for-next' of git://git.infradead.org/users/sameo/mfd-2.6Linus Torvalds2011-11-031-1/+1
|\ \ | |/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-next' of git://git.infradead.org/users/sameo/mfd-2.6: (80 commits) mfd: Fix missing abx500 header file updates mfd: Add missing <linux/io.h> include to intel_msic x86, mrst: add platform support for MSIC MFD driver mfd: Expose TurnOnStatus in ab8500 sysfs mfd: Remove support for early drop ab8500 chip mfd: Add support for ab8500 v3.3 mfd: Add ab8500 interrupt disable hook mfd: Convert db8500-prcmu panic() into pr_crit() mfd: Refactor db8500-prcmu request_clock() function mfd: Rename db8500-prcmu init function mfd: Fix db5500-prcmu defines mfd: db8500-prcmu voltage domain consumers additions mfd: db8500-prcmu reset code retrieval mfd: db8500-prcmu tweak for modem wakeup mfd: Add db8500-pcmu watchdog accessor functions for watchdog mfd: hwacc power state db8500-prcmu accessor mfd: Add db8500-prcmu accessors for PLL and SGA clock mfd: Move to the new db500 PRCMU API mfd: Create a common interface for dbx500 PRCMU drivers mfd: Initialize DB8500 PRCMU regs ... Fix up trivial conflicts in arch/arm/mach-imx/mach-mx31moboard.c arch/arm/mach-omap2/board-omap3beagle.c arch/arm/mach-u300/include/mach/irqs.h drivers/mfd/wm831x-spi.c
| * mfd: Move to the new db500 PRCMU APIMattias Nilsson2011-10-241-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Now that we have a shared API between the DB8500 and DB5500 PRCMU's, switch to using this neutral API instead. We delete the parts of db8500-prcmu.h that is now PRCMU-neutral, and calls will be diverted to respective driver. Common registers are in dbx500-prcmu-regs.h and common accessors and defines in <linux/mfd/dbx500-prcmu.h> This way we get a a lot more abstraction and code reuse. Signed-off-by: Mattias Nilsson <mattias.i.nilsson@stericsson.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
* | Merge branch 'timers-core-for-linus' of ↵Linus Torvalds2011-10-262-2/+6
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip * 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (23 commits) time, s390: Get rid of compile warning dw_apb_timer: constify clocksource name time: Cleanup old CONFIG_GENERIC_TIME references that snuck in time: Change jiffies_to_clock_t() argument type to unsigned long alarmtimers: Fix error handling clocksource: Make watchdog reset lockless posix-cpu-timers: Cure SMP accounting oddities s390: Use direct ktime path for s390 clockevent device clockevents: Add direct ktime programming function clockevents: Make minimum delay adjustments configurable nohz: Remove "Switched to NOHz mode" debugging messages proc: Consider NO_HZ when printing idle and iowait times nohz: Make idle/iowait counter update conditional nohz: Fix update_ts_time_stat idle accounting cputime: Clean up cputime_to_usecs and usecs_to_cputime macros alarmtimers: Rework RTC device selection using class interface alarmtimers: Add try_to_cancel functionality alarmtimers: Add more refined alarm state tracking alarmtimers: Remove period from alarm structure alarmtimers: Remove interval cap limit hack ...
| * | nohz: Fix update_ts_time_stat idle accountingMichal Hocko2011-09-082-2/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | update_ts_time_stat currently updates idle time even if we are in iowait loop at the moment. The only real users of the idle counter (via get_cpu_idle_time_us) are CPU governors and they expect to get cumulative time for both idle and iowait times. The value (idle_sleeptime) is also printed to userspace by print_cpu but it prints both idle and iowait times so the idle part is misleading. Let's clean this up and fix update_ts_time_stat to account both counters properly and update consumers of idle to consider iowait time as well. If we do this we might use get_cpu_{idle,iowait}_time_us from other contexts as well and we will get expected values. Signed-off-by: Michal Hocko <mhocko@suse.cz> Cc: Dave Jones <davej@redhat.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Alexey Dobriyan <adobriyan@gmail.com> Link: http://lkml.kernel.org/r/e9c909c221a8da402c4da07e4cd968c3218f8eb1.1314172057.git.mhocko@suse.cz Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* | | Merge branch 'master' into for-nextJiri Kosina2011-09-152-0/+23
|\ \ \ | | |/ | |/| | | | | | | Fast-forward merge with Linus to be able to merge patches based on more recent version of the tree.
| * | drivers/cpufreq/pcc-cpufreq.c: avoid NULL pointer dereferenceNaga Chumbalkar2011-09-141-0/+3
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | per_cpu(processors, n) can be NULL, resulting in: Loading CPUFreq modules[ 437.661360] BUG: unable to handle kernel NULL pointer dereference at (null) IP: [<ffffffffa0434314>] pcc_cpufreq_cpu_init+0x74/0x220 [pcc_cpufreq] It's better to avoid the oops by failing the driver, and allowing the system to boot. Signed-off-by: Naga Chumbalkar <nagananda.chumbalkar@hp.com> Cc: Dave Jones <davej@codemonkey.org.uk> Cc: Len Brown <lenb@kernel.org> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * Merge branch 'drm-core-next' of ↵Linus Torvalds2011-07-261-0/+20
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 * 'drm-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6: (135 commits) drm/radeon/kms: fix DP training for DPEncoderService revision bigger than 1.1 drm/radeon/kms: add missing vddci setting on NI+ drm/radeon: Add a rmb() in IH processing drm/radeon: ATOM Endian fix for atombios_crtc_program_pll() drm/radeon: Fix the definition of RADEON_BUF_SWAP_32BIT drm/radeon: Do an MMIO read on interrupts when not uisng MSIs drm/radeon: Writeback endian fixes drm/radeon: Remove a bunch of useless _iomem casts drm/gem: add support for private objects DRM: clean up and document parsing of video= parameter DRM: Radeon: Fix section mismatch. drm: really make debug levels match in edid failure code drm/radeon/kms: fix i2c map for rv250/280 drm/nouveau/gr: disable fifo access and idle before suspend ctx unload drm/nouveau: pass flag to engine fini() method on suspend drm/nouveau: replace nv04_graph_fifo_access() use with direct reg bashing drm/nv40/gr: rewrite/split context takedown functions drm/nouveau: detect disabled device in irq handler and return IRQ_NONE drm/nouveau: ignore connector type when deciding digital/analog on DVI-I drm/nouveau: Add a quirk for Gigabyte NX86T ...
| | * Merge branch 'drm-intel-next' of ↵Dave Airlie2011-07-141-0/+20
| | |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ssh://master.kernel.org/pub/scm/linux/kernel/git/keithp/linux-2.6 into drm-core-next * 'drm-intel-next' of ssh://master.kernel.org/pub/scm/linux/kernel/git/keithp/linux-2.6: (52 commits) drm/i915: provide module parameter description drm/i915: add module parameter compiler hints drm/i915/bios: Avoid temporary allocation whilst searching for downclock drm/i915: Cache GT fifo count for SandyBridge i915: Fix opregion notifications drm/i915: TVDAC_STATE_CHG does not indicate successful load-detect drm/i915: Select correct pipe during TV detect drm/i915/ringbuffer: Idling requires waiting for the ring to be empty Revert "drm/i915: enable rc6 by default" drm/i915: Clean up i915_driver_load failure path drm/i915: Enable i915 frame buffer compression by default drm/i915: Share the common work of disabling active FBC before updating drm/i915: Perform intel_enable_fbc() from a delayed task drm/i915: Disable FBC across page-flipping drm/i915: Set persistent-mode for ILK/SNB framebuffer compression drm/i915: Use of a CPU fence is mandatory to update FBC regions upon CPU writes drm/i915: Remove vestigial pitch from post-gen2 FBC control routines drm/i915: Replace direct calls to vfunc.disable_fbc with intel_disable_fbc() drm/i915: Only export the generic intel_disable_fbc() interface drm/i915: Enable GPU reset on Ivybridge. ...
| | | * cpufreq: expose a cpufreq_quick_get_max routineJesse Barnes2011-06-281-0/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This allows drivers and other code to get the max reported CPU frequency. Initial use is for scaling ring frequency with GPU frequency in the i915 driver. Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Keith Packard <keithp@keithp.com>
* | | | Fix documentation and comment typo 'no_hz'Paul Bolle2011-08-081-1/+1
|/ / / | | | | | | | | | | | | | | | Signed-off-by: Paul Bolle <pebolle@tiscali.nl> Acked-by: Len Brown <len.brown@intel.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* | | Merge branch 'next' of ↵Linus Torvalds2011-07-254-0/+325
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (99 commits) drivers/virt: add missing linux/interrupt.h to fsl_hypervisor.c powerpc/85xx: fix mpic configuration in CAMP mode powerpc: Copy back TIF flags on return from softirq stack powerpc/64: Make server perfmon only built on ppc64 server devices powerpc/pseries: Fix hvc_vio.c build due to recent changes powerpc: Exporting boot_cpuid_phys powerpc: Add CFAR to oops output hvc_console: Add kdb support powerpc/pseries: Fix hvterm_raw_get_chars to accept < 16 chars, fixing xmon powerpc/irq: Quieten irq mapping printks powerpc: Enable lockup and hung task detectors in pseries and ppc64 defeconfigs powerpc: Add mpt2sas driver to pseries and ppc64 defconfig powerpc: Disable IRQs off tracer in ppc64 defconfig powerpc: Sync pseries and ppc64 defconfigs powerpc/pseries/hvconsole: Fix dropped console output hvc_console: Improve tty/console put_chars handling powerpc/kdump: Fix timeout in crash_kexec_wait_realmode powerpc/mm: Fix output of total_ram. powerpc/cpufreq: Add cpufreq driver for Momentum Maple boards powerpc: Correct annotations of pmu registration functions ... Fix up trivial Kconfig/Makefile conflicts in arch/powerpc, drivers, and drivers/cpufreq
| * | | powerpc/cpufreq: Add cpufreq driver for Momentum Maple boardsDmitry Eremin-Solenikov2011-07-194-0/+326
| | |/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | Add simple cpufreq driver for Maple-based boards (ppc970fx evaluation kit and others). Driver is based on a cpufreq driver for 64-bit powermac boxes with all pmac-dependant features removed and simple cleanup applied. Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | | [CPUFREQ] s5pv210: make needlessly global symbols staticAxel Lin2011-07-131-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The following symbols are needlessly defined global: s5pv210_verify_speed s5pv210_getspeed Make them static. Signed-off-by: Axel Lin <axel.lin@gmail.com> Acked-by: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by: Dave Jones <davej@redhat.com>
* | | [CPUFREQ] exynos4210: make needlessly global symbols staticAxel Lin2011-07-131-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The following symbols are needlessly defined global: exynos4_verify_speed exynos4_getspeed exynos4_set_clkdiv Make them static. Signed-off-by: Axel Lin <axel.lin@gmail.com> Acked-by: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by: Dave Jones <davej@redhat.com>
* | | [CPUFREQ] S3C6410: Add some lower frequencies for 800MHz base clock operationMark Brown2011-07-131-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | By extension from the 667MHz based clocks currently supported add 100MHz and 200MHz operating points. Due to a lack of documentation these have not been confirmed as supported but by extension from the existing frequencies they should be OK, and I've given them quite a bit of runtime testing. The major risk is synchronization with the non-ARM clocks but as we can't currently scale the ARM PLL the risk should be relatively low. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by: Dave Jones <davej@redhat.com>
* | | [CPUFREQ] S5PV210: Add reboot notifier to prevent system hangHuisung Kang2011-07-131-0/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When system reboot, the CPUFREQ level should be 800MHz to prevent system lockup. Signed-off-by: Huisung Kang <hs1218.kang@samsung.com> Signed-off-by: Jonghwan Choi <jhbird.choi@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by: Dave Jones <davej@redhat.com>
* | | [CPUFREQ] S5PV210: Adjust udelay prior to voltage scaling downTodd Poynor2011-07-131-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Voltage scaling accesses the MAX8998 regulators over bit-banged I2C with lots of udelays. In the case of decreasing CPU speed, the number of loops per us for udelay needs to be adjusted prior to decreasing voltage to avoid delaying for up to 10X too long. Signed-off-by: Todd Poynor <toddpoynor@google.com> Signed-off-by: Jonghwan Choi <jhbird.choi@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by: Dave Jones <davej@redhat.com>
* | | [CPUFREQ] S5PV210: Lock a mutex while changing the cpu frequencyArve Hjønnevåg2011-07-131-9/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Without this lock the call to change the frequency for suspend could switch to a new frequency while another thread was still changing the cpu voltage. Signed-off-by: Arve Hjønnevåg <arve@android.com> Signed-off-by: Jonghwan Choi <jhbird.choi@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by: Dave Jones <davej@redhat.com>
* | | [CPUFREQ] S5PV210: Add pm_notifier to prevent system unstableHuisung Kang2011-07-131-0/+34
| | | | | | | | | | | | | | | | | | | | | | | | | | | Minimum 800MHz is needed to enter/exit suspend mode due to voltage mismatch. Signed-off-by: Huisung Kang <hs1218.kang@samsung.com> Signed-off-by: Jonghwan Choi <jhbird.choi@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by: Dave Jones <davej@redhat.com>
* | | [CPUFREQ] S5PV210: Add arm/int voltage control supportJonghwan Choi2011-07-131-3/+68
| | | | | | | | | | | | | | | | | | Signed-off-by: Jonghwan Choi <jhbird.choi@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by: Dave Jones <davej@redhat.com>
* | | [CPUFREQ] S5PV210: Add additional symantics for "relation" in cpufreq with pmHuisung Kang2011-07-131-0/+28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Relation has an additional symantics other than standard. s5pv310_target funtion have below additional relation. - DISABLE_FURTHER_CPUFREQ : disable further access to target - ENABLE_FURTHER_CPUFRER : enable access to target Signed-off-by: Huisung Kang <hs1218.kang@samsung.com> Signed-off-by: Jonghwan Choi <jhbird.choi@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by: Dave Jones <davej@redhat.com>
* | | [CPUFREQ] S3C64xx: Notify transition complete as soon as frequency changedMark Brown2011-07-131-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The CPUFREQ_POSTCHANGE notification is used to update things that depend on the system clock rates. Since this may include the interfaces used to talk to the regulators do the notification before we try to update regulators to reflect lowered system clock rate. The voltage scaling is just a power optimisation and may not happen at all so there's no concern about it not having completed. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by: Dave Jones <davej@redhat.com>
* | | [CPUFREQ] S3C6410: Support 800MHz operation in cpufreqMark Brown2011-07-131-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | At least some newer S3C6410 silicon supports operation up to 800MHz rather than just 667MHz. Unfortunately I don't have access to any of documentation of this other than some running systems, add a new cpufreq table entry for this based on the behaviour of those systems. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by: Dave Jones <davej@redhat.com>
* | | [CPUFREQ] s5pv210-cpufreq.c: Add missing clk_putJulia Lawall2011-07-131-8/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The successive calls to clk_get each call clk_put in the case of failure, but this is not done for subsequent error handling code. The calls to clk_get are moved to the end of the function, and appropriate gotos are added. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @r exists@ expression e1,e2; statement S; @@ e1 = clk_get@p1(...); ... when != e1 = e2 when != clk_put(e1) when any if (...) { ... when != clk_put(e1) when != if (...) { ... clk_put(e1) ... } * return@p3 ...; } else S // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by: Dave Jones <davej@redhat.com>
* | | [CPUFREQ] Move compile for S3C64XX cpufreq to /drivers/cpufreqKukjin Kim2011-07-133-1/+10
| | | | | | | | | | | | | | | | | | Cc: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by: Dave Jones <davej@redhat.com>
* | | [CPUFREQ] Remove some vi noise that escaped into the Makefile.Dave Jones2011-07-131-3/+2
| | |
* | | [CPUFREQ] Move ARM Samsung cpufreq drivers to drivers/cpufreq/Kukjin Kim2011-07-135-0/+1082
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | According to discussion of the ARM arch subsystem migration, ARM cpufreq drivers move to drivers/cpufreq. So this patch adds Kconfig.arm for ARM like x86 and adds Samsung S5PV210 and EXYNOS4210 cpufreq driver compile in there. As a note, otherw will be moved. Cc: Dave Jones <davej@redhat.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by: Dave Jones <davej@redhat.com>
* | | [CPUFREQ/S3C64xx] Move S3C64xx CPUfreq driver into drivers/cpufreqMark Brown2011-07-132-0/+270
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is a straight code motion patch, there are no changes to the driver itself. The Kconfig is left untouched as the ARM CPUfreq Kconfig is all in one big block in arm/Kconfig and should be moved en masse rather than being done piecemeal. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Dave Jones <davej@redhat.com>
* | | [CPUFREQ] Handle CPUs with different capabilities in acpi-cpufreqMatthew Garrett2011-07-131-1/+1
| |/ |/| | | | | | | | | | | | | | | | | acpi-cpufreq checks each CPU for aperf/mperf support, but only sets a global flag. This will cause errors if some CPUs in the system don't support the feature. Check boot_cpu_has() instead in order to make sure that all CPUs support it. Signed-off-by: Matthew Garrett <mjg@redhat.com> Signed-off-by: Dave Jones <davej@redhat.com>
* | [CPUFREQ] fix cpumask memory leak in acpi-cpufreq on cpu hotplug.Luming Yu2011-07-101-1/+1
|/ | | | | | | | | I came across a memory leak during a cyclic cpu-online-offline test. Signed-off-by: Yu Luming <luming.yu@intel.com> Cc: Len Brown <lenb@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Dave Jones <davej@redhat.com>
* [CPUFREQ] powernow-k8: Don't try to transition if the pstate is incorrectKonrad Rzeszutek Wilk2011-06-161-1/+2
| | | | | | | | | | | This patch augments the pstate transition code to error out (instead of returning 0) when an incorrect pstate is provided. Suggested-by: Borislav Petkov <bp@alien8.de> CC: andre.przywara@amd.com CC: Mark.Langsdorf@amd.com Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by: Dave Jones <davej@redhat.com>
* [CPUFREQ] powernow-k8: Don't notify of successful transition if we failed ↵Konrad Rzeszutek Wilk2011-06-161-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | (vid case). Before this patch if we failed the vid transition would still try to submit the "new" frequencies to cpufreq. That is incorrect - also we could submit a non-existing frequency value which would cause cpufreq to crash. The ultimate fix is in cpufreq to deal with incorrect values, but this patch improves the error recovery in the AMD powernowk8 driver. The failure that was reported was as follows: powernow-k8: Found 1 AMD Athlon(tm) 64 Processor 3700+ (1 cpu cores) (version 2.20.00) powernow-k8: fid 0x2 (1000 MHz), vid 0x12 powernow-k8: fid 0xa (1800 MHz), vid 0xa powernow-k8: fid 0xc (2000 MHz), vid 0x8 powernow-k8: fid 0xe (2200 MHz), vid 0x8 Marking TSC unstable due to cpufreq changes powernow-k8: fid trans failed, fid 0x2, curr 0x0 BUG: unable to handle kernel paging request at ffff880807e07b78 IP: [<ffffffff81479163>] cpufreq_stats_update+0x46/0x5b ... And transition fails and data->currfid ends up with 0. Since the machine does not support 800Mhz value when the calculation is done ('find_khz_freq_from_fid(data->currfid);') it reports the new frequency as 800000 which is bogus. This patch fixes the issue during target setting. The patch however does not fix the issue in 'powernowk8_cpu_init' where the pol->cur can also be set with the 800000 value: pol->cur = find_khz_freq_from_fid(data->currfid); dprintk("policy current frequency %d kHz\n", pol->cur); /* min/max the cpu is capable of */ if (cpufreq_frequency_table_cpuinfo(pol, data->powernow_table)) { The fix for that looks to update cpufreq_frequency_table_cpuinfo to check pol->cur.... but that would cause an regression in how the acpi-cpufreq driver works (it sets cpu->cur after calling cpufreq_frequency_table_cpuinfo). Instead the fix will be to let cpufreq gracefully handle bogus data (another patch). Acked-by: Borislav Petkov <bp@alien8.de> CC: andre.przywara@amd.com CC: Mark.Langsdorf@amd.com Reported-by: Tobias Diedrich <ranma+xen@tdiedrich.de> Tested-by: Tobias Diedrich <ranma+xen@tdiedrich.de> [v1: Rebased on v3.0-rc2, reduced patch to deal with vid case] Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by: Dave Jones <davej@redhat.com>
* [CPUFREQ] Don't set stat->last_index to -1 if the pol->cur has incorrect value.Konrad Rzeszutek Wilk2011-06-161-3/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If the driver submitted an non-existing pol>cur value (say it used the default initialized value of zero), when the cpufreq stats tries to setup its initial values it incorrectly sets stat->last_index to -1 (or 0xfffff...). And cpufreq_stats_update tries to update at that index location and fails. This can be caused by: stat->last_index = freq_table_get_index(stat, policy->cur); not finding the appropiate frequency in the table (b/c the policy->cur is wrong) and we end up crashing. The fix however is concentrated in the 'cpufreq_stats_update' as the last_index (and old_index) are updated there. Which means it can reset the last_index to -1 again and on the next iteration cause a crash. Without this patch, the following crash is observed: powernow-k8: Found 1 AMD Athlon(tm) 64 Processor 3700+ (1 cpu cores) (version 2.20.00) powernow-k8: fid 0x2 (1000 MHz), vid 0x12 powernow-k8: fid 0xa (1800 MHz), vid 0xa powernow-k8: fid 0xc (2000 MHz), vid 0x8 powernow-k8: fid 0xe (2200 MHz), vid 0x8 Marking TSC unstable due to cpufreq changes powernow-k8: fid trans failed, fid 0x2, curr 0x0 BUG: unable to handle kernel paging request at ffff880807e07b78 IP: [<ffffffff81479163>] cpufreq_stats_update+0x46/0x5b .. snip.. Pid: 1, comm: swapper Not tainted 3.0.0-rc2 #45 MICRO-STAR INTERNATIONAL CO., LTD MS-7094/MS-7094 ..snip.. Call Trace: [<ffffffff81479248>] cpufreq_stat_notifier_trans+0x48/0x7c [<ffffffff81095d68>] notifier_call_chain+0x32/0x5e [<ffffffff81095e6b>] __srcu_notifier_call_chain+0x47/0x63 [<ffffffff81095e96>] srcu_notifier_call_chain+0xf/0x11 [<ffffffff81477e7a>] cpufreq_notify_transition+0x111/0x134 [<ffffffff8147b0d4>] powernowk8_target+0x53b/0x617 [<ffffffff8147723a>] __cpufreq_driver_target+0x2e/0x30 [<ffffffff8147a127>] cpufreq_governor_dbs+0x339/0x356 [<ffffffff81477394>] __cpufreq_governor+0xa8/0xe9 [<ffffffff81477525>] __cpufreq_set_policy+0x132/0x13e [<ffffffff8147848d>] cpufreq_add_dev_interface+0x272/0x28c Reported-by: Tobias Diedrich <ranma+xen@tdiedrich.de> Tested-by: Tobias Diedrich <ranma+xen@tdiedrich.de> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by: Dave Jones <davej@redhat.com>
* [CPUFREQ] Remove cpufreq_stats sysfs entries on module unload.Dave Jones2011-06-121-0/+1
| | | | | | | | | cpufreq_stats leaves behind its sysfs entries, which causes a panic when something stumbled across them. (Discovered by unloading cpufreq_stats while powertop was loaded). Signed-off-by: Dave Jones <davej@redhat.com> Cc: stable@kernel.org
* cpufreq: make DB8500 cpufreq driver compileLinus Walleij2011-05-241-0/+2
| | | | | | | | | Concluding interface update and movement of the driver by making the DB8500 cpufreq driver compile in the cpufreq subsystem. Cc: Arnd Bergmann <arnd@arndb.de> Acked-by: Dave Jones <davej@redhat.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* cpufreq: update DB8500 cpufreq driverLinus Walleij2011-05-241-104/+63
| | | | | | | | | This updates the ux500 cpufreq driver to the new interface from the updated DB8500 PRCMU Cc: Arnd Bergmann <arnd@arndb.de> Acked-by: Dave Jones <davej@redhat.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* mach-ux500: move CPUfreq driver to cpufreq subsystemLinus Walleij2011-05-241-0/+210
| | | | | | | | | | | As part of the ARM arch subsystem migration, move the DB8500 cpufreq driver to drivers/cpufreq as discussed with Dave Jones. The Makefile is not updated in order to avoid cross-subsystem conflicts for this file in merges. Cc: Arnd Bergmann <arnd@arndb.de> Acked-by: Dave Jones <davej@redhat.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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