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2014-10-20cpufreq: drop owner assignment from platform_driversWolfram Sang14-14/+0
A platform_driver does not need to set an owner, it will be populated by the driver core. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-10-15Merge tag 'clk-for-linus-3.18' of ↵Linus Torvalds1-9/+5
git://git.linaro.org/people/mike.turquette/linux Pull clock tree updates from Mike Turquette: "The clk tree changes for 3.18 are dominated by clock drivers. Mostly fixes and enhancements to existing drivers as well as new drivers. This tag contains a bit more arch code than I usually take due to some OMAP2+ changes. Additionally it contains the restart notifier handlers which are merged as a dependency into several trees. The PXA changes are the only messy part. Due to having a stable tree I had to revert one patch and follow up with one more fix near the tip of this tag. Some dead code is introduced but it will soon become live code after 3.18-rc1 is released as the rest of the PXA family is converted over to the common clock framework. Another trend in this tag is that multiple vendors have started to push the complexity of changing their CPU frequency into the clock driver, whereas this used to be done in CPUfreq drivers. Changes to the clk core include a generic gpio-clock type and a clk_set_phase() function added to the top-level clk.h api. Due to some confusion on the fbdev mailing list the kernel boot parameters documentation was updated to further explain the clk_ignore_unused parameter, which is often required by users of the simplefb driver. Finally some fixes to the locking around the clock debugfs stuff was done to prevent deadlocks when interacting with other subsystems." * tag 'clk-for-linus-3.18' of git://git.linaro.org/people/mike.turquette/linux: (99 commits) clk: pxa clocks build system fix Revert "arm: pxa: Transition pxa27x to clk framework" clk: samsung: register restart handlers for s3c2412 and s3c2443 clk: rockchip: add restart handler clk: rockchip: rk3288: i2s_frac adds flag to set parent's rate doc/kernel-parameters.txt: clarify clk_ignore_unused arm: pxa: Transition pxa27x to clk framework dts: add devicetree bindings for pxa27x clocks clk: add pxa27x clock drivers arm: pxa: add clock pll selection bits clk: dts: document pxa clock binding clk: add pxa clocks infrastructure clk: gpio-gate: Ensure gpiod_ APIs are prototyped clk: ti: dra7-atl-clock: Mark the device as pm_runtime_irq_safe clk: ti: LLVMLinux: Move __init outside of type definition clk: ti: consider the fact that of_clk_get() might return an error clk: ti: dra7-atl-clock: fix a memory leak clk: ti: change clock init to use generic of_clk_init clk: hix5hd2: add I2C clocks clk: hix5hd2: add watchdog0 clocks ...
2014-10-12Merge branch 'for-linus' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux Pull powerpc updates from Michael Ellerman: "Here's a first pull request for powerpc updates for 3.18. The bulk of the additions are for the "cxl" driver, for IBM's Coherent Accelerator Processor Interface (CAPI). Most of it's in drivers/misc, which Greg & Arnd maintain, Greg said he was happy for us to take it through our tree. There's the usual minor cleanups and fixes, including a bit of noise in drivers from some of those. A bunch of updates to our EEH code, which has been getting more testing. Several nice speedups from Anton, including 20% in clear_page(). And a bunch of updates for freescale from Scott" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux: (130 commits) cxl: Fix afu_read() not doing finish_wait() on signal or non-blocking cxl: Add documentation for userspace APIs cxl: Add driver to Kbuild and Makefiles cxl: Add userspace header file cxl: Driver code for powernv PCIe based cards for userspace access cxl: Add base builtin support powerpc/mm: Add hooks for cxl powerpc/opal: Add PHB to cxl mode call powerpc/mm: Add new hash_page_mm() powerpc/powerpc: Add new PCIe functions for allocating cxl interrupts cxl: Add new header for call backs and structs powerpc/powernv: Split out set MSI IRQ chip code powerpc/mm: Export mmu_kernel_ssize and mmu_linear_psize powerpc/msi: Improve IRQ bitmap allocator powerpc/cell: Make spu_flush_all_slbs() generic powerpc/cell: Move data segment faulting code out of cell platform powerpc/cell: Move spu_handle_mm_fault() out of cell platform powerpc/pseries: Use new defines when calling H_SET_MODE powerpc: Update contact info in Documentation files powerpc/perf/hv-24x7: Simplify catalog_read() ...
2014-10-10Merge tag 'pm+acpi-3.18-rc1' of ↵Linus Torvalds13-266/+425
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull ACPI and power management updates from Rafael Wysocki: "Features-wise, to me the most important this time is a rework of wakeup interrupts handling in the core that makes them work consistently across all of the available sleep states, including suspend-to-idle. Many thanks to Thomas Gleixner for his help with this work. Second is an update of the generic PM domains code that has been in need of some care for quite a while. Unused code is being removed, DT support is being added and domains are now going to be attached to devices in bus type code in analogy with the ACPI PM domain. The majority of work here was done by Ulf Hansson who also has been the most active developer this time. Apart from this we have a traditional ACPICA update, this time to upstream version 20140828 and a few ACPI wakeup interrupts handling patches on top of the general rework mentioned above. There also are several cpufreq commits including renaming the cpufreq-cpu0 driver to cpufreq-dt, as this is what implements generic DT-based cpufreq support, and a new DT-based idle states infrastructure for cpuidle. In addition to that, the ACPI LPSS driver is updated, ACPI support for Apple machines is improved, a few bugs are fixed and a few cleanups are made all over. Finally, the Adaptive Voltage Scaling (AVS) subsystem now has a tree maintained by Kevin Hilman that will be merged through the PM tree. Numbers-wise, the generic PM domains update takes the lead this time with 32 non-merge commits, second is cpufreq (15 commits) and the 3rd place goes to the wakeup interrupts handling rework (13 commits). Specifics: - Rework the handling of wakeup IRQs by the IRQ core such that all of them will be switched over to "wakeup" mode in suspend_device_irqs() and in that mode the first interrupt will abort system suspend in progress or wake up the system if already in suspend-to-idle (or equivalent) without executing any interrupt handlers. Among other things that eliminates the wakeup-related motivation to use the IRQF_NO_SUSPEND interrupt flag with interrupts which don't really need it and should not use it (Thomas Gleixner and Rafael Wysocki) - Switch over ACPI to handling wakeup interrupts with the help of the new mechanism introduced by the above IRQ core rework (Rafael Wysocki) - Rework the core generic PM domains code to eliminate code that's not used, add DT support and add a generic mechanism by which devices can be added to PM domains automatically during enumeration (Ulf Hansson, Geert Uytterhoeven and Tomasz Figa). - Add debugfs-based mechanics for debugging generic PM domains (Maciej Matraszek). - ACPICA update to upstream version 20140828. Included are updates related to the SRAT and GTDT tables and the _PSx methods are in the METHOD_NAME list now (Bob Moore and Hanjun Guo). - Add _OSI("Darwin") support to the ACPI core (unfortunately, that can't really be done in a straightforward way) to prevent Thunderbolt from being turned off on Apple systems after boot (or after resume from system suspend) and rework the ACPI Smart Battery Subsystem (SBS) driver to work correctly with Apple platforms (Matthew Garrett and Andreas Noever). - ACPI LPSS (Low-Power Subsystem) driver update cleaning up the code, adding support for 133MHz I2C source clock on Intel Baytrail to it and making it avoid using UART RTS override with Auto Flow Control (Heikki Krogerus). - ACPI backlight updates removing the video_set_use_native_backlight quirk which is not necessary any more, making the code check the list of output devices returned by the _DOD method to avoid creating acpi_video interfaces that won't work and adding a quirk for Lenovo Ideapad Z570 (Hans de Goede, Aaron Lu and Stepan Bujnak) - New Win8 ACPI OSI quirks for some Dell laptops (Edward Lin) - Assorted ACPI code cleanups (Fabian Frederick, Rasmus Villemoes, Sudip Mukherjee, Yijing Wang, and Zhang Rui) - cpufreq core updates and cleanups (Viresh Kumar, Preeti U Murthy, Rasmus Villemoes) - cpufreq driver updates: cpufreq-cpu0/cpufreq-dt (driver name change among other things), ppc-corenet, powernv (Viresh Kumar, Preeti U Murthy, Shilpasri G Bhat, Lucas Stach) - cpuidle support for DT-based idle states infrastructure, new ARM64 cpuidle driver, cpuidle core cleanups (Lorenzo Pieralisi, Rasmus Villemoes) - ARM big.LITTLE cpuidle driver updates: support for DT-based initialization and Exynos5800 compatible string (Lorenzo Pieralisi, Kevin Hilman) - Rework of the test_suspend kernel command line argument and a new trace event for console resume (Srinivas Pandruvada, Todd E Brandt) - Second attempt to optimize swsusp_free() (hibernation core) to make it avoid going through all PFNs which may be way too slow on some systems (Joerg Roedel) - devfreq updates (Paul Bolle, Punit Agrawal, Ãrjan Eide). - rockchip-io Adaptive Voltage Scaling (AVS) driver and AVS entry update in MAINTAINERS (Heiko Stübner, Kevin Hilman) - PM core fix related to clock management (Geert Uytterhoeven) - PM core's sysfs code cleanup (Johannes Berg)" * tag 'pm+acpi-3.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (105 commits) ACPI / fan: printk replacement PM / clk: Fix crash in clocks management code if !CONFIG_PM_RUNTIME PM / Domains: Rename cpu_data to cpuidle_data cpufreq: cpufreq-dt: fix potential double put of cpu OF node cpufreq: cpu0: rename driver and internals to 'cpufreq_dt' PM / hibernate: Iterate over set bits instead of PFNs in swsusp_free() cpufreq: ppc-corenet: remove duplicate update of cpu_data ACPI / sleep: Rework the handling of ACPI GPE wakeup from suspend-to-idle PM / sleep: Rename platform suspend/resume functions in suspend.c PM / sleep: Export dpm_suspend_late/noirq() and dpm_resume_early/noirq() ACPICA: Introduce acpi_enable_all_wakeup_gpes() ACPICA: Clear all non-wakeup GPEs in acpi_hw_enable_wakeup_gpe_block() ACPI / video: check _DOD list when creating backlight devices PM / Domains: Move dev_pm_domain_attach|detach() to pm_domain.h cpufreq: Replace strnicmp with strncasecmp cpufreq: powernv: Set the cpus to nominal frequency during reboot/kexec cpufreq: powernv: Set the pstate of the last hotplugged out cpu in policy->cpus to minimum cpufreq: Allow stop CPU callback to be used by all cpufreq drivers PM / devfreq: exynos: Enable building exynos PPMU as module PM / devfreq: Export helper functions for drivers ...
2014-10-09Merge tag 'fixes-nc-for-linus' of ↵Linus Torvalds1-2/+2
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC non-critical bug fixes from Arnd Bergmann: "These are bug fixes for harmless problems that were not important enough to get fixed in 3.17. The majority of these are OMAP specific, but there are also a couple for Marvell mvebu, cns3xxx, and others, as well as some updates for the MAINTAINERS file. In particular, Robert Jarzmik and Daniel Mack now volunteered to help out maintaining the PXA platform, Krzysztof Halasa took over the cns3xxx platform, Carlo Caione is the maintainer for the new Amlogic meson platform, and Matthias Brugger is now listed for the mediatek platform he recently contributed" * tag 'fixes-nc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (42 commits) MAINTAINERS: update Shawn's email address MAINTAINERS: condense some Tegra related entries MAINTAINERS: add Alexandre Courbot for Tegra MAINTAINERS: CNS3xxx and IXP4xx update. MAINTAINERS: Add maintainers entry for Mediatek SoCs arm, vt8500, LLVMLlinux: Use mcr instead of mcr% for mach-vt8500 MAINTAINERS: add a third maintainer to mach-bcm CNS3xxx: Fix PCIe read size limit. CNS3xxx: Fix logical PCIe topology. CNS3xxx: Fix debug UART. MAINTAINERS: Add entry for the Amlogic MesonX SoCs MAINTAINERS: update ARM pxa maintainers ARM: at91/PMC: don't forget to write PMC_PCDR register to disable clocks ARM: at91: fix at91sam9263ek DT mmc pinmuxing settings ARM: mvebu: Netgear RN102: Use Hardware BCH ECC ARM: Kirkwood: Fix DT based DSA. ARM: OMAP2+: make of_device_ids const ARM: omap2: make arrays containing machine compatible strings const ARM: LPC32xx: Fix reset function ARM: mvebu: Netgear RN2120: Use Hardware BCH ECC ...
2014-10-03Merge back cpufreq material for v3.18.Rafael J. Wysocki13-266/+425
2014-10-03cpufreq: cpufreq-dt: fix potential double put of cpu OF nodeLucas Stach1-1/+2
If cpufreq_generic_init() fails we jump into the resource cleanup path which contains a of_node_put() call. Another instance of this has already been called at that time resulting a double decrement of the refcount. Fix this by calling of_node_put() only after we are sure that nothing has gone wrong. Fixes: d2f31f1da54f "cpufreq: cpu0: Move per-cluster initialization code to ->init()" Signed-off-by: Lucas Stach <l.stach@pengutronix.de> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-10-03cpufreq: cpu0: rename driver and internals to 'cpufreq_dt'Viresh Kumar9-32/+32
The naming convention of this driver was always under the scanner, people complained that it should have a more generic name than cpu0, as it manages all CPUs that are sharing clock lines. Also, in future it will be modified to support any number of clusters with separate clock/voltage lines. Lets rename it to 'cpufreq_dt' from 'cpufreq_cpu0'. Tested-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-10-02powerpc: Remove powerpc specific cmd_lineAnton Blanchard1-1/+1
There is no need for yet another copy of the command line, just use boot_command_line like everyone else. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2014-09-30cpufreq: ppc-corenet: remove duplicate update of cpu_dataViresh Kumar1-1/+0
'cpu_data' is updated for policy->cpu first and then for all CPUs in policy->cpus. policy->cpus is guaranteed to contain policy->cpu as well and so the first write to 'cpu_data' for policy->cpu is redundant. Remove it. Acked-by: Tang Yuantian <Yuantian.Tang@freescale.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-09-30cpufreq: update 'cpufreq_suspended' after stopping governorsViresh Kumar1-3/+4
Commit 8e30444e1530 ("cpufreq: fix cpufreq suspend/resume for intel_pstate") introduced a bug where the governors wouldn't be stopped anymore for ->target{_index}() drivers during suspend. This happens because 'cpufreq_suspended' is updated before stopping the governors during suspend and due to this __cpufreq_governor() would return early due to this check: /* Don't start any governor operations if we are entering suspend */ if (cpufreq_suspended) return 0; Fixes: 8e30444e1530 ("cpufreq: fix cpufreq suspend/resume for intel_pstate") Cc: 3.15+ <stable@vger.kernel.org> # 3.15+: 8e30444e1530 "cpufreq: fix cpufreq suspend/resume for intel_pstate" Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-09-29cpufreq: Replace strnicmp with strncasecmpRasmus Villemoes1-3/+3
The kernel used to contain two functions for length-delimited, case-insensitive string comparison, strnicmp with correct semantics and a slightly buggy strncasecmp. The latter is the POSIX name, so strnicmp was renamed to strncasecmp, and strnicmp made into a wrapper for the new strncasecmp to avoid breaking existing users. To allow the compat wrapper strnicmp to be removed at some point in the future, and to avoid the extra indirection cost, do s/strnicmp/strncasecmp/g. Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-09-29cpufreq: powernv: Set the cpus to nominal frequency during reboot/kexecShilpasri G Bhat1-0/+35
This patch ensures the cpus to kexec/reboot at nominal frequency. Nominal frequency is the highest cpu frequency on PowerPC at which the cores can run without getting throttled. If the host kernel had set the cpus to a low pstate and then it kexecs/reboots to a cpufreq disabled kernel it would cause the target kernel to perform poorly. It will also increase the boot up time of the target kernel. So set the cpus to high pstate, in this case to nominal frequency before rebooting to avoid such scenarios. The reboot notifier will set the cpus to nominal frequncy. Signed-off-by: Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com> Reviewed-by: Preeti U Murthy <preeti@linux.vnet.ibm.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-09-29cpufreq: powernv: Set the pstate of the last hotplugged out cpu in ↵Preeti U Murthy1-0/+9
policy->cpus to minimum Its possible today that the pstate of a core is held at a high even after the entire core is hotplugged out if a load had just run on the hotplugged cpu. This is fair, since it is assumed that the pstate does not matter to a cpu in a deep idle state, which is the expected state of a hotplugged core on powerpc. However on powerpc, the pstate at a socket level is held at the maximum of the pstates of each core. Even if the pstates of the active cores on that socket is low, the socket pstate is held high due to the pstate of the hotplugged core in the above mentioned scenario. This can cost significant amount of power loss for no good. Besides, since it is a non active core, nothing can be done from the kernel's end to set the frequency of the core right. Hence make use of the stop_cpu callback to explicitly set the pstate of the core to a minimum when the last cpu of the core gets hotplugged out. Signed-off-by: Preeti U Murthy <preeti@linux.vnet.ibm.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-09-29cpufreq: Allow stop CPU callback to be used by all cpufreq driversPreeti U Murthy1-1/+1
Commit 367dc4aa932bfb3 ("cpufreq: Add stop CPU callback to cpufreq_driver interface") introduced the stop CPU callback for intel_pstate drivers. During the CPU_DOWN_PREPARE stage, this callback is invoked so that drivers can take some action on the pstate of the cpu before it is taken offline. This callback was assumed to be useful only for those drivers which have implemented the set_policy CPU callback because they have no other way to take action about the cpufreq of a CPU which is being hotplugged out except in the exit callback which is called very late in the offline process. The drivers which implement the target/target_index callbacks were expected to take care of requirements like the ones that commit 367dc4aa addresses in the GOV_STOP notification event. But there are disadvantages to restricting the usage of stop CPU callback to cpufreq drivers that implement the set_policy callbacks and who want to take explicit action on the setting the cpufreq during a hotplug operation. 1.GOV_STOP gets called for every CPU offline and drivers would usually want to take action when the last cpu in the policy->cpus mask is taken offline. As long as there is more than one cpu in the policy->cpus mask, cpufreq core itself makes sure that the freq for the other cpus in this mask is set according to the maximum load. This is sensible and drivers which implement the target_index callback would mostly not want to modify that. However the cpufreq core leaves a loose end when the cpu in the policy->cpus mask is the last one to go offline; it does nothing explicit to the frequency of the core. Drivers may need a way to take some action here and stop CPU callback mechanism is the best way to do it today. 2. We cannot implement driver specific actions in the GOV_STOP mechanism. So we will need another driver callback which is invoked from here which is unnecessary. Therefore this patch extends the usage of stop CPU callback to be used by all cpufreq drivers as long as they have this callback implemented and irrespective of whether they are set_policy/target_index drivers. The assumption is if the drivers find the GOV_STOP path to be a suitable way of implementing what they want to do with the freq of the cpu going offine,they will not implement the stop CPU callback at all. Signed-off-by: Preeti U Murthy <preeti@linux.vnet.ibm.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-09-29cpufreq: integrator: fix integrator_cpufreq_remove return typeArnd Bergmann1-2/+2
When building this driver as a module, we get a helpful warning about the return type: drivers/cpufreq/integrator-cpufreq.c:232:2: warning: initialization from incompatible pointer type .remove = __exit_p(integrator_cpufreq_remove), If the remove callback returns void, the caller gets an undefined value as it expects an integer to be returned. This fixes the problem by passing down the value from cpufreq_unregister_driver. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: All applicable <stable@vger.kernel.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-09-29cpufreq: pcc-cpufreq: Fix wait_event() under spinlockRafael J. Wysocki1-1/+1
Fix the following bug introduced by commit 8fec051eea73 (cpufreq: Convert existing drivers to use cpufreq_freq_transition_{begin|end}) that forgot to move the spin_lock() in pcc_cpufreq_target() past cpufreq_freq_transition_begin() which calls wait_event(): BUG: sleeping function called from invalid context at drivers/cpufreq/cpufreq.c:370 in_atomic(): 1, irqs_disabled(): 0, pid: 2636, name: modprobe Preemption disabled at:[<ffffffffa04d74d7>] pcc_cpufreq_target+0x27/0x200 [pcc_cpufreq] [ 51.025044] CPU: 57 PID: 2636 Comm: modprobe Tainted: G E 3.17.0-default #7 Hardware name: Hewlett-Packard ProLiant DL980 G7, BIOS P66 07/07/2010 00000000ffffffff ffff88026c46b828 ffffffff81589dbd 0000000000000000 ffff880037978090 ffff88026c46b848 ffffffff8108e1df ffff880037978090 0000000000000000 ffff88026c46b878 ffffffff8108e298 ffff88026d73ec00 Call Trace: [<ffffffff81589dbd>] dump_stack+0x4d/0x90 [<ffffffff8108e1df>] ___might_sleep+0x10f/0x180 [<ffffffff8108e298>] __might_sleep+0x48/0xd0 [<ffffffff8145b905>] cpufreq_freq_transition_begin+0x75/0x140 drivers/cpufreq/cpufreq.c:370 wait_event(policy->transition_wait, !policy->transition_ongoing); [<ffffffff8108fc99>] ? preempt_count_add+0xb9/0xc0 [<ffffffffa04d7513>] pcc_cpufreq_target+0x63/0x200 [pcc_cpufreq] drivers/cpufreq/pcc-cpufreq.c:207 spin_lock(&pcc_lock); [<ffffffff810e0d0f>] ? update_ts_time_stats+0x7f/0xb0 [<ffffffff8145be55>] __cpufreq_driver_target+0x85/0x170 [<ffffffff8145e4c8>] od_check_cpu+0xa8/0xb0 [<ffffffff8145ef10>] dbs_check_cpu+0x180/0x1d0 [<ffffffff8145f310>] cpufreq_governor_dbs+0x3b0/0x720 [<ffffffff8145ebe3>] od_cpufreq_governor_dbs+0x33/0xe0 [<ffffffff814593d9>] __cpufreq_governor+0xa9/0x210 [<ffffffff81459fb2>] cpufreq_set_policy+0x1e2/0x2e0 [<ffffffff8145a6cc>] cpufreq_init_policy+0x8c/0x110 [<ffffffff8145c9a0>] ? cpufreq_update_policy+0x1b0/0x1b0 [<ffffffff8108fb99>] ? preempt_count_sub+0xb9/0x100 [<ffffffff8145c6c6>] __cpufreq_add_dev+0x596/0x6b0 [<ffffffffa016c608>] ? pcc_cpufreq_probe+0x4b4/0x4b4 [pcc_cpufreq] [<ffffffff8145c7ee>] cpufreq_add_dev+0xe/0x10 [<ffffffff81408e81>] subsys_interface_register+0xc1/0xf0 [<ffffffff8108fb99>] ? preempt_count_sub+0xb9/0x100 [<ffffffff8145b3d7>] cpufreq_register_driver+0x117/0x2a0 [<ffffffffa016c65d>] pcc_cpufreq_init+0x55/0x9f8 [pcc_cpufreq] [<ffffffffa016c608>] ? pcc_cpufreq_probe+0x4b4/0x4b4 [pcc_cpufreq] [<ffffffff81000298>] do_one_initcall+0xc8/0x1f0 [<ffffffff811a731d>] ? __vunmap+0x9d/0x100 [<ffffffff810eb9a0>] do_init_module+0x30/0x1b0 [<ffffffff810edfa6>] load_module+0x686/0x710 [<ffffffff810ebb20>] ? do_init_module+0x1b0/0x1b0 [<ffffffff810ee1db>] SyS_init_module+0x9b/0xc0 [<ffffffff8158f7a9>] system_call_fastpath+0x16/0x1b Fixes: 8fec051eea73 (cpufreq: Convert existing drivers to use cpufreq_freq_transition_{begin|end}) Reported-and-tested-by: Mike Galbraith <umgwanakikbuti@gmail.com> Cc: 3.15+ <stable@vger.kernel.org> # 3.15+ Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-09-27Merge tag 'tegra-clk-3.18' of ↵Mike Turquette2-5/+1
git://nv-tegra.nvidia.com/user/pdeschrijver/linux into clk-next Tegra clk updates for 3.18
2014-09-24Merge tag 'mvebu-fixes-3.17' of git://git.infradead.org/linux-mvebu into ↵Olof Johansson1-1/+1
next/fixes-non-critical Merge "mvebu fixes for v3.17" from Jason Cooper: - kirkwood - final driver cleanup of ARCH_KIRKWOOD removal - fix DT based DSA - mvebu - use BCH ECC for the RN2120 and RN104/2 nand chips * tag 'mvebu-fixes-3.17' of git://git.infradead.org/linux-mvebu: ARM: mvebu: Netgear RN102: Use Hardware BCH ECC ARM: Kirkwood: Fix DT based DSA. ARM: mvebu: Netgear RN2120: Use Hardware BCH ECC ARM: mvebu: Netgear RN104: Use Hardware BCH ECC cpufreq: Remove ARCH_KIRKWOOD dependency watchdog: Remove ARCH_KIRKWOOD dependency rtc: Remove ARCH_KIRKWOOD dependency leds: Remove ARCH_KIRKWOOD dependency thermal: Remove ARCH_KIRKWOOD dependency ata: Remove ARCH_KIRKWOOD dependency cpuidle: kirkwood: Remove ARCH_KIRKWOOD dependency
2014-09-24Merge tag 'fixes-v3.18-not-urgent' of ↵Olof Johansson2-2/+3
git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into next/fixes-non-critical Merge "non-urgent omap fixes for v3.18 merge window" from Tony Lindgren: Fixes for omaps that were not considered urgent enough for the -rc cycle: - Fixes for .dts files to differentiate panda and beaglebone versions - Powerdomain fixes from Nishant Menon mostly for newer omaps - Fixes for __initconst and of_device_ids const usage * tag 'fixes-v3.18-not-urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap: ARM: OMAP2+: make of_device_ids const ARM: omap2: make arrays containing machine compatible strings const ARM: OMAP4+: PM: Use only valid low power state for CPU hotplug ARM: OMAP4+: PM: use only valid low power state for suspend ARM: OMAP4+: PM: Make logic state programmable ARM: OMAP2+: powerdomain: introduce logic for finding valid power domain ARM: OMAP2+: powerdomain: pwrdm_for_each_clkdm iterate only valid clkdms ARM: OMAP5: powerdomain data: fix powerdomain powerstate ARM: OMAP: DRA7: powerdomain data: fix powerdomain powerstate ARM: dts: am335x-bone*: Fix model name and update compatibility information ARM: dts: omap4-panda: Fix model and SoC family details + Linux 3.17-rc3 Signed-off-by: Olof Johansson <olof@lixom.net>
2014-09-22cpufreq: release policy->rwsem on errorPrarit Bhargava1-0/+2
While debugging a cpufreq-related hardware failure on a system I saw the following lockdep warning: ========================= [ BUG: held lock freed! ] 3.17.0-rc4+ #1 Tainted: G E ------------------------- insmod/2247 is freeing memory ffff88006e1b1400-ffff88006e1b17ff, with a lock still held there! (&policy->rwsem){+.+...}, at: [<ffffffff8156d37d>] __cpufreq_add_dev.isra.21+0x47d/0xb80 3 locks held by insmod/2247: #0: (subsys mutex#5){+.+.+.}, at: [<ffffffff81485579>] subsys_interface_register+0x69/0x120 #1: (cpufreq_rwsem){.+.+.+}, at: [<ffffffff8156cf73>] __cpufreq_add_dev.isra.21+0x73/0xb80 #2: (&policy->rwsem){+.+...}, at: [<ffffffff8156d37d>] __cpufreq_add_dev.isra.21+0x47d/0xb80 stack backtrace: CPU: 0 PID: 2247 Comm: insmod Tainted: G E 3.17.0-rc4+ #1 Hardware name: HP ProLiant MicroServer Gen8, BIOS J06 08/24/2013 0000000000000000 000000008f3063c4 ffff88006f87bb30 ffffffff8171b358 ffff88006bcf3750 ffff88006f87bb68 ffffffff810e09e1 ffff88006e1b1400 ffffea0001b86c00 ffffffff8156d327 ffff880073003500 0000000000000246 Call Trace: [<ffffffff8171b358>] dump_stack+0x4d/0x66 [<ffffffff810e09e1>] debug_check_no_locks_freed+0x171/0x180 [<ffffffff8156d327>] ? __cpufreq_add_dev.isra.21+0x427/0xb80 [<ffffffff8121412b>] kfree+0xab/0x2b0 [<ffffffff8156d327>] __cpufreq_add_dev.isra.21+0x427/0xb80 [<ffffffff81724cf7>] ? _raw_spin_unlock+0x27/0x40 [<ffffffffa003517f>] ? pcc_cpufreq_do_osc+0x17f/0x17f [pcc_cpufreq] [<ffffffff8156da8e>] cpufreq_add_dev+0xe/0x10 [<ffffffff814855d1>] subsys_interface_register+0xc1/0x120 [<ffffffff8156bcf2>] cpufreq_register_driver+0x112/0x340 [<ffffffff8121415a>] ? kfree+0xda/0x2b0 [<ffffffffa003517f>] ? pcc_cpufreq_do_osc+0x17f/0x17f [pcc_cpufreq] [<ffffffffa003562e>] pcc_cpufreq_init+0x4af/0xe81 [pcc_cpufreq] [<ffffffffa003517f>] ? pcc_cpufreq_do_osc+0x17f/0x17f [pcc_cpufreq] [<ffffffff81002144>] do_one_initcall+0xd4/0x210 [<ffffffff811f7472>] ? __vunmap+0xd2/0x120 [<ffffffff81127155>] load_module+0x1315/0x1b70 [<ffffffff811222a0>] ? store_uevent+0x70/0x70 [<ffffffff811229d9>] ? copy_module_from_fd.isra.44+0x129/0x180 [<ffffffff81127b86>] SyS_finit_module+0xa6/0xd0 [<ffffffff81725b69>] system_call_fastpath+0x16/0x1b cpufreq: __cpufreq_add_dev: ->get() failed insmod: ERROR: could not insert module pcc-cpufreq.ko: No such device The warning occurs in the __cpufreq_add_dev() code which does down_write(&policy->rwsem); ... if (cpufreq_driver->get && !cpufreq_driver->setpolicy) { policy->cur = cpufreq_driver->get(policy->cpu); if (!policy->cur) { pr_err("%s: ->get() failed\n", __func__); goto err_get_freq; } If cpufreq_driver->get(policy->cpu) returns an error we execute the code at err_get_freq, which does not up the policy->rwsem. This causes the lockdep warning. Trivial patch to up the policy->rwsem in the error path. After the patch has been applied, and an error occurs in the cpufreq_driver->get(policy->cpu) call we will now see cpufreq: __cpufreq_add_dev: ->get() failed cpufreq: __cpufreq_add_dev: ->get() failed modprobe: ERROR: could not insert 'pcc_cpufreq': No such device Fixes: 4e97b631f24c (cpufreq: Initialize governor for a new policy under policy->rwsem) Signed-off-by: Prarit Bhargava <prarit@redhat.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Cc: 3.14+ <stable@vger.kernel.org> # 3.14+ Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-09-22cpufreq: fix cpufreq suspend/resume for intel_pstateLan Tianyu1-4/+4
Cpufreq core introduces cpufreq_suspended flag to let cpufreq sysfs nodes across S2RAM/S2DISK. But the flag is only set in the cpufreq_suspend() for cpufreq drivers which have target or target_index callback. This skips intel_pstate driver. This patch is to set the flag before checking target or target_index callback. Fixes: 2f0aea936360 (cpufreq: suspend governors on system suspend/hibernate) Signed-off-by: Lan Tianyu <tianyu.lan@intel.com> Cc: 3.15+ <stable@vger.kernel.org> # 3.15+ [rjw: Subject] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-09-09cpufreq: Remove ARCH_KIRKWOOD dependencyAndrew Lunn1-1/+1
mach-kirkwood has been removed, now that kirkwood lives in mach-mvebu. ARCH_MVEBU is sufficient. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Cc: Viresh Kumar <viresh.kumar@linaro.org> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Acked-by: "Rafael J. Wysocki" <rjw@rjwysocki.net> Link: https://lkml.kernel.org/r/1409417172-6846-8-git-send-email-andrew@lunn.ch Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2014-09-09cpufreq: cpu0: Make allocate_resources() work for any CPUViresh Kumar1-13/+17
Currently allocate_resources() supports only CPU0 and it would need to allocate resources for any CPU going forward. Add another argument to it, i.e. cpu, and update code accordingly. Tested-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-09-09cpufreq: cpu0: try regulators with name "cpu-supply"Viresh Kumar1-1/+13
Currently, we expect regulator name to be "cpu0", but as we are going to support multiple cpu-blocks (all CPUs in a block share clock/voltage) later, we need to pass some generic string instead of that. For backwards compatibility try for "cpu0" first and if it fails, then try for "cpu". Suggested-by: Stephen Boyd <sboyd@codeaurora.org> Tested-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-09-09cpufreq: cpu0: Move per-cluster initialization code to ->init()Viresh Kumar1-53/+136
Currently this driver only support platforms on which all CPUs share clock & voltage lines and there is requirement to support platforms which have separate clock & voltage lines for CPUs, like Qualcomm's Krait and ARM's big LITTLE. Each group of CPUs sharing clock/voltage lines are represented by 'struct cpufreq_policy' in cpufreq framework. And core calls ->init() once for each policy. Currently we do all initialization/allocation from probe() which wouldn't work for above scenario. To make it work for these platforms, the first step is to move all initialization/allocation to ->init() and add ->exit() to do the reverse of it. Also, remove all global variables and allocate space for them at runtime. This patch creates 'struct private_data' for keeping all such information and a pointer to that would be stored in policy->driver_data. The changed probe() routine now tries to see if regulator/clocks are available or we need to defer probe. In case they are available, it registers cpufreq driver. Otherwise, returns with -EPROBE_DEFER. We still *don't* support platforms with separate clock/voltage lines for CPUs. This would be done in a separate patch later. Tested-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-09-09cpufreq: cpu0: use dev_{err|warn|dbg} instead of pr_{err|warn|debug}Viresh Kumar1-14/+18
We already have cpu_dev and is used at multiple places for printing errors using dev_*(). But some prints are still using pr_*(). Lets make it consistent and replace those pr_*() macros with dev_*() macros. Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Tested-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-09-09cpufreq: cpu0: print relevant error when we defer probeViresh Kumar1-1/+10
Currently, we defer probe if regulator_get() returned -EPROBE_DEFER, i.e. regulator isn't registered yet. We do a dev_err() in this case. Sending a message to the log on probe defer just duplicates what the driver core is already doing. Convert it to dev_dbg() instead. We should defer in case of clk_get() as well. Current code already does it, but it wasn't intentional probably. Its just that we are returning the right error with wrong print message. Fix print message to convey right error. Tested-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-09-09cpufreq: cpu0: don't validate clock on clk_put()Viresh Kumar1-2/+1
CPU clk is not optional for this driver and probe would fail if it couldn't find a suitable clock. And so, while calling clk_put() we don't need to validate clocks. Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Tested-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-09-09cpufreq: cpu0: Update Module AuthorViresh Kumar1-0/+4
Two people are maintaining it now, Viresh and Shawn. Add Viresh's details in MODULE_AUTHOR() and copyright section. Suggested-by: Shawn Guo <shawn.guo@linaro.org> Tested-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-09-08cpufreq / OPP: Fix the order of arguments for kcalloc()Anand Moon1-1/+1
These changes fix the argument to the kcalloc @n: number of elements. @size: element size. @flags: the type of memory to allocate (see kmalloc). void *kcalloc(size_t n, size_t size, gfp_t flags) Fixes: 3c5445ce3a0c (cpufreq: OPP: Avoid sleeping while atomic) Signed-off-by: Anand Moon <moon.linux@yahoo.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Reviewed-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-09-05ARM: cns3xxx: fix allmodconfig panic in pci driverXia Kaixu1-1/+1
The kernel panic occurs when running an allmodconfig kernel on OMAP4460. The inicall "cns3xxx_pcie_init" does not check which hardware it's running on and just tries to access to its specific registers. Now call it from .init_late callback from the two machine descriptors. Signed-off-by: Xia Kaixu <kaixu.xia@linaro.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: Anton Vorontsov <anton@enomsg.org> Cc: Felix Fietkau <nbd@openwrt.org> Cc: Imre Kaloz <kaloz@openwrt.org> Cc: linaro-kernel@lists.linaro.org Cc: linux-arm-kernel@lists.infradead.org
2014-09-03cpufreq: intel_pstate: Remove unneeded variableGabriele Mazzotta1-4/+0
It should have been removed with commit d1b6848590af ("cpufreq / intel_pstate: Optimize intel_pstate_set_policy") Signed-off-by: Gabriele Mazzotta <gabriele.mzt@gmail.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-09-03cpufreq: kirkwood: use the powersave multiplexerMike Turquette1-9/+5
The powersave clock acts like a multiplexer for the cpu, selecting either the clock signal derived from the cpu pll or from the ddr clock. This patch changes powersave from a gate clock to a mux clock to better reflect this behavior. This is a cleaner approach whereby the frequency of the cpu always matches the rate of powersave_clk. The cpufreq driver for the kirkwood platform no longer must parse this behavior out of various calls to clk_enable and clk_disable, but can instead simply select the parent cpu it wants when changing rate. Likewise when requesting the cpu rate we need only query powersave_clk's rate through the usual call to clk_get_rate. The new clock data and corresponding changes to the cpufreq driver are combined into this single commit to avoid a git bisect issue where this cpufreq driver fails to work properly between the commit that updates the kirkwood clock driver and the commit that changes how the cpufreq driver uses that clock. Cc: Tomeu Vizoso <tomeu.vizoso@collabora.com> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Tested-by: Andrew Lunn <andrew@lunn.ch> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Mike Turquette <mturquette@linaro.org>
2014-08-28cpufreq: s5pv210: Remove spurious __init annotationMark Brown1-1/+1
Since this is a platform driver and can be probed at any time we can't annotate funtions in the probe path as __init, the code can't safely be discarded at the end of kernel init. Signed-off-by: Mark Brown <broonie@linaro.org> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-08-28cpufreq: intel_pstate: Add CPU ID for Braswell processorMika Westerberg1-0/+1
This is pretty much the same as Intel Baytrail, only the CPU ID is different. Add the new ID to the supported CPU list. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Acked-by: Dirk Brandewie <dirk.j.brandewie@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-08-28intel_pstate: Turn per cpu printk into pr_debugAndi Kleen1-1/+1
On larger systems intel_pstate currently spams the boot up log with its "Intel pstate controlling ..." message for each CPU. It's the only subsystem that prints a message for each CPU. Turn the message into a pr_debug. Signed-off-by: Andi Kleen <ak@linux.intel.com> Acked-by: Dirk Brandewie <dirk.j.brandewie@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-08-15Merge tag 'pm+acpi-3.17-rc1-2' of ↵Linus Torvalds6-10/+15
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull more ACPI and power management updates from Rafael Wysocki: "These are a couple of regression fixes, cpuidle menu governor optimizations, fixes for ACPI proccessor and battery drivers, hibernation fix to avoid problems related to the e820 memory map, fixes for a few cpufreq drivers and a new version of the suspend profiling tool analyze_suspend.py. Specifics: - Fix for an ACPI-based device hotplug regression introduced in 3.14 that causes a kernel panic to trigger when memory hot-remove is attempted with CONFIG_ACPI_HOTPLUG_MEMORY unset from Tang Chen - Fix for a cpufreq regression introduced in 3.16 that triggers a "sleeping function called from invalid context" bug in dev_pm_opp_init_cpufreq_table() from Stephen Boyd - ACPI battery driver fix for a warning message added in 3.16 that prints silly stuff sometimes from Mariusz Ceier - Hibernation fix for safer handling of mismatches in the 820 memory map between the configurations during image creation and during the subsequent restore from Chun-Yi Lee - ACPI processor driver fix to handle CPU hotplug notifications correctly during system suspend/resume from Lan Tianyu - Series of four cpuidle menu governor cleanups that also should speed it up a bit from Mel Gorman - Fixes for the speedstep-smi, integrator, cpu0 and arm_big_little cpufreq drivers from Hans Wennborg, Himangi Saraogi, Markus Pargmann and Uwe Kleine-König - Version 3.0 of the analyze_suspend.py suspend profiling tool from Todd E Brandt" * tag 'pm+acpi-3.17-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: ACPI / battery: Fix warning message in acpi_battery_get_state() PM / tools: analyze_suspend.py: update to v3.0 cpufreq: arm_big_little: fix module license spec cpufreq: speedstep-smi: fix decimal printf specifiers ACPI / hotplug: Check scan handlers in acpi_scan_hot_remove() cpufreq: OPP: Avoid sleeping while atomic cpufreq: cpu0: Do not print error message when deferring cpufreq: integrator: Use set_cpus_allowed_ptr PM / hibernate: avoid unsafe pages in e820 reserved regions ACPI / processor: Make acpi_cpu_soft_notify() process CPU FROZEN events cpuidle: menu: Lookup CPU runqueues less cpuidle: menu: Call nr_iowait_cpu less times cpuidle: menu: Use ktime_to_us instead of reinventing the wheel cpuidle: menu: Use shifts when calculating averages where possible
2014-08-14Merge tag 'devicetree-for-linus' of git://git.secretlab.ca/git/linuxLinus Torvalds1-2/+1
Pull device tree updates from Grant Likely: "The branch contains the following device tree changes the v3.17 merge window: Group changes to the device tree. In preparation for adding device tree overlay support, OF_DYNAMIC is reworked so that a set of device tree changes can be prepared and applied to the tree all at once. OF_RECONFIG notifiers see the most significant change here so that users always get a consistent view of the tree. Notifiers generation is moved from before a change to after it, and notifiers for a group of changes are emitted after the entire block of changes have been applied Automatic console selection from DT. Console drivers can now use of_console_check() to see if the device node is specified as a console device. If so then it gets added as a preferred console. UART devices get this support automatically when uart_add_one_port() is called. DT unit tests no longer depend on pre-loaded data in the device tree. Data is loaded dynamically at the start of unit tests, and then unloaded again when the tests have completed. Also contains a few bugfixes for reserved regions and early memory setup" * tag 'devicetree-for-linus' of git://git.secretlab.ca/git/linux: (21 commits) of: Fixing OF Selftest build error drivers: of: add automated assignment of reserved regions to client devices of: Use proper types for checking memory overflow of: typo fix in __of_prop_dup() Adding selftest testdata dynamically into live tree of: Add todo tasklist for Devicetree of: Transactional DT support. of: Reorder device tree changes and notifiers of: Move dynamic node fixups out of powerpc and into common code of: Make sure attached nodes don't carry along extra children of: Make devicetree sysfs update functions consistent. of: Create unlocked versions of node and property add/remove functions OF: Utility helper functions for dynamic nodes of: Move CONFIG_OF_DYNAMIC code into a separate file of: rename of_aliases_mutex to just of_mutex of/platform: Fix of_platform_device_destroy iteration of devices of: Migrate of_find_node_by_name() users to for_each_node_by_name() tty: Update hypervisor tty drivers to use core stdout parsing code. arm/versatile: Add the uart as the stdout device. of: Enable console on serial ports specified by /chosen/stdout-path ...
2014-08-09cpufreq: arm_big_little: fix module license specUwe Kleine-König2-1/+6
Having no license specification in a module taints the kernel during load with: arm_big_little: module license 'unspecified' taints kernel. and also the linker doesn't allow it to make use of GPL-exported symbols which in this case also results in errors like: arm_big_little: Unknown symbol cpufreq_register_driver (err 0) . The header of the driver specifies a GPL v2 license, so note that accordingly. While at it also add a description and an author and fix the license in a companion file to explicit v2. Reported-by: Andreas Schwab <schwab@suse.de> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-08-08Merge tag 'soc-for-3.17' of ↵Linus Torvalds5-18/+122
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC platform changes from Olof Johansson: "This is the bulk of new SoC enablement and other platform changes for 3.17: - Samsung S5PV210 has been converted to DT and multiplatform - Clock drivers and bindings for some of the lower-end i.MX 1/2 platforms - Kirkwood, one of the popular Marvell platforms, is folded into the mvebu platform code, removing mach-kirkwood - Hwmod data for TI AM43xx and DRA7 platforms - More additions of Renesas shmobile platform support - Removal of plat-samsung contents that can be removed with S5PV210 being multiplatform/DT-enabled and the other two old platforms being removed New platforms (most with only basic support right now): - Hisilicon X5HD2 settop box chipset is introduced - Mediatek MT6589 (mobile chipset) is introduced - Broadcom BCM7xxx settop box chipset is introduced + as usual a lot other pieces all over the platform code" * tag 'soc-for-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (240 commits) ARM: hisi: remove smp from machine descriptor power: reset: move hisilicon reboot code ARM: dts: Add hix5hd2-dkb dts file. ARM: debug: Rename Hi3716 to HIX5HD2 ARM: hisi: enable hix5hd2 SoC ARM: hisi: add ARCH_HISI MAINTAINERS: add entry for Broadcom ARM STB architecture ARM: brcmstb: select GISB arbiter and interrupt drivers ARM: brcmstb: add infrastructure for ARM-based Broadcom STB SoCs ARM: configs: enable SMP in bcm_defconfig ARM: add SMP support for Broadcom mobile SoCs Documentation: arm: misc updates to Marvell EBU SoC status Documentation: arm: add URLs to public datasheets for the Marvell Armada XP SoC ARM: mvebu: fix build without platforms selected ARM: mvebu: add cpuidle support for Armada 38x ARM: mvebu: add cpuidle support for Armada 370 cpuidle: mvebu: add Armada 38x support cpuidle: mvebu: add Armada 370 support cpuidle: mvebu: rename the driver from armada-370-xp to mvebu-v7 ARM: mvebu: export the SCU address ...
2014-08-07cpufreq: speedstep-smi: fix decimal printf specifiersHans Wennborg1-2/+2
The prefix suggests the number should be printed in hex, so use the %x specifier to do that. Also, these are 32-bit values, so drop the l characters. Signed-off-by: Hans Wennborg <hans@hanshq.net> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-08-07Merge branch 'next' of ↵Linus Torvalds1-2/+16
git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc Pull powerpc updates from Ben Herrenschmidt: "This is the powerpc new goodies for 3.17. The short story: The biggest bit is Michael removing all of pre-POWER4 processor support from the 64-bit kernel. POWER3 and rs64. This gets rid of a ton of old cruft that has been bitrotting in a long while. It was broken for quite a few versions already and nobody noticed. Nobody uses those machines anymore. While at it, he cleaned up a bunch of old dusty cabinets, getting rid of a skeletton or two. Then, we have some base VFIO support for KVM, which allows assigning of PCI devices to KVM guests, support for large 64-bit BARs on "powernv" platforms, support for HMI (Hardware Management Interrupts) on those same platforms, some sparse-vmemmap improvements (for memory hotplug), There is the usual batch of Freescale embedded updates (summary in the merge commit) and fixes here or there, I think that's it for the highlights" * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (102 commits) powerpc/eeh: Export eeh_iommu_group_to_pe() powerpc/eeh: Add missing #ifdef CONFIG_IOMMU_API powerpc: Reduce scariness of interrupt frames in stack traces powerpc: start loop at section start of start in vmemmap_populated() powerpc: implement vmemmap_free() powerpc: implement vmemmap_remove_mapping() for BOOK3S powerpc: implement vmemmap_list_free() powerpc: Fail remap_4k_pfn() if PFN doesn't fit inside PTE powerpc/book3s: Fix endianess issue for HMI handling on napping cpus. powerpc/book3s: handle HMIs for cpus in nap mode. powerpc/powernv: Invoke opal call to handle hmi. powerpc/book3s: Add basic infrastructure to handle HMI in Linux. powerpc/iommu: Fix comments with it_page_shift powerpc/powernv: Handle compound PE in config accessors powerpc/powernv: Handle compound PE for EEH powerpc/powernv: Handle compound PE powerpc/powernv: Split ioda_eeh_get_state() powerpc/powernv: Allow to freeze PE powerpc/powernv: Enable M64 aperatus for PHB3 powerpc/eeh: Aux PE data for error log ...
2014-08-07Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linusLinus Torvalds1-3/+3
Pull MIPS updates from Ralf Baechle: "This is the main pull request for 3.17. It contains: - misc Cavium Octeon, BCM47xx, BCM63xx and Alchemy updates - MIPS ptrace updates and cleanups - various fixes that will also go to -stable - a number of cleanups and small non-critical fixes. - NUMA support for the Loongson 3. - more support for MSA - support for MAAR - various FP enhancements and fixes" * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (139 commits) MIPS: jz4740: remove unnecessary null test before debugfs_remove MIPS: Octeon: remove unnecessary null test before debugfs_remove_recursive MIPS: ZBOOT: implement stack protector in compressed boot phase MIPS: mipsreg: remove duplicate MIPS_CONF4_FTLBSETS_SHIFT MIPS: Bonito64: remove a duplicate define MIPS: Malta: initialise MAARs MIPS: Initialise MAARs MIPS: detect presence of MAARs MIPS: define MAAR register accessors & bits MIPS: mark MSA experimental MIPS: Don't build MSA support unless it can be used MIPS: consistently clear MSA flags when starting & copying threads MIPS: 16 byte align MSA vector context MIPS: disable preemption whilst initialising MSA MIPS: ensure MSA gets disabled during boot MIPS: fix read_msa_* & write_msa_* functions on non-MSA toolchains MIPS: fix MSA context for tasks which don't use FP first MIPS: init upper 64b of vector registers when MSA is first used MIPS: save/disable MSA in lose_fpu MIPS: preserve scalar FP CSR when switching vector context ...
2014-08-07cpufreq: OPP: Avoid sleeping while atomicStephen Boyd1-1/+1
We allocate the cpufreq table after calling rcu_read_lock(), which disables preemption. This causes scheduling while atomic warnings. Use GFP_ATOMIC instead of GFP_KERNEL and update for kcalloc while we're here. BUG: sleeping function called from invalid context at mm/slub.c:1246 in_atomic(): 0, irqs_disabled(): 0, pid: 80, name: modprobe 5 locks held by modprobe/80: #0: (&dev->mutex){......}, at: [<c050d484>] __driver_attach+0x48/0x98 #1: (&dev->mutex){......}, at: [<c050d494>] __driver_attach+0x58/0x98 #2: (subsys mutex#5){+.+.+.}, at: [<c050c114>] subsys_interface_register+0x38/0xc8 #3: (cpufreq_rwsem){.+.+.+}, at: [<c05a9c8c>] __cpufreq_add_dev.isra.22+0x84/0x92c #4: (rcu_read_lock){......}, at: [<c05ab24c>] dev_pm_opp_init_cpufreq_table+0x18/0x10c Preemption disabled at:[< (null)>] (null) CPU: 2 PID: 80 Comm: modprobe Not tainted 3.16.0-rc3-next-20140701-00035-g286857f216aa-dirty #217 [<c0214da8>] (unwind_backtrace) from [<c02123f8>] (show_stack+0x10/0x14) [<c02123f8>] (show_stack) from [<c070141c>] (dump_stack+0x70/0xbc) [<c070141c>] (dump_stack) from [<c02f4cb0>] (__kmalloc+0x124/0x250) [<c02f4cb0>] (__kmalloc) from [<c05ab270>] (dev_pm_opp_init_cpufreq_table+0x3c/0x10c) [<c05ab270>] (dev_pm_opp_init_cpufreq_table) from [<bf000508>] (cpufreq_init+0x48/0x378 [cpufreq_generic]) [<bf000508>] (cpufreq_init [cpufreq_generic]) from [<c05a9e08>] (__cpufreq_add_dev.isra.22+0x200/0x92c) [<c05a9e08>] (__cpufreq_add_dev.isra.22) from [<c050c160>] (subsys_interface_register+0x84/0xc8) [<c050c160>] (subsys_interface_register) from [<c05a9494>] (cpufreq_register_driver+0x108/0x2d8) [<c05a9494>] (cpufreq_register_driver) from [<bf000888>] (generic_cpufreq_probe+0x50/0x74 [cpufreq_generic]) [<bf000888>] (generic_cpufreq_probe [cpufreq_generic]) from [<c050e994>] (platform_drv_probe+0x18/0x48) [<c050e994>] (platform_drv_probe) from [<c050d1f4>] (driver_probe_device+0x128/0x370) [<c050d1f4>] (driver_probe_device) from [<c050d4d0>] (__driver_attach+0x94/0x98) [<c050d4d0>] (__driver_attach) from [<c050b778>] (bus_for_each_dev+0x54/0x88) [<c050b778>] (bus_for_each_dev) from [<c050c894>] (bus_add_driver+0xe8/0x204) [<c050c894>] (bus_add_driver) from [<c050dd48>] (driver_register+0x78/0xf4) [<c050dd48>] (driver_register) from [<c0208870>] (do_one_initcall+0xac/0x1d8) [<c0208870>] (do_one_initcall) from [<c028b6b4>] (load_module+0x190c/0x21e8) [<c028b6b4>] (load_module) from [<c028c034>] (SyS_init_module+0xa4/0x110) [<c028c034>] (SyS_init_module) from [<c020f0c0>] (ret_fast_syscall+0x0/0x48) Fixes: a0dd7b79657b (PM / OPP: Move cpufreq specific OPP functions out of generic OPP library) Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Cc: 3.16+ <stable@vger.kernel.org> # 3.16+ Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-08-07cpufreq: cpu0: Do not print error message when deferringMarkus Pargmann1-1/+1
-EPROBE_DEFER is no real error. We are just waiting unti the necessary components are ready. The driver core infrastructure will also print an appropriate info message. This patch changes the error message to a debug message. Signed-off-by: Markus Pargmann <mpa@pengutronix.de> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-08-07cpufreq: integrator: Use set_cpus_allowed_ptrHimangi Saraogi1-5/+5
Several years ago there was an effort to convert all uses of set_cpus_allowed to use set_cpus_allowed_ptr with the goal of eventually removing the current definition of set_cpus_allowed and renaming set_cpus_allowed_ptr as set_cpus_allowed (https://lkml.org/lkml/2010/3/26/59). This is another step in this direction. The Coccinelle semantic patch that makes this change is as follows: // <smpl> @@ expression E1,E2; @@ - set_cpus_allowed(E1, cpumask_of_cpu(E2)) + set_cpus_allowed_ptr(E1, cpumask_of(E2)) @@ expression E; identifier I; @@ - set_cpus_allowed(E, I) + set_cpus_allowed_ptr(E, &I) // </smpl> Signed-off-by: Himangi Saraogi <himangi774@gmail.com> Acked-by: Julia Lawall <julia.lawall@lip6.fr> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-08-05powerpc/cpufreq: Add pr_warn() on OPAL firmware failuresVaidyanathan Srinivasan1-2/+16
Cpufreq depends on platform firmware to implement PStates. In case of platform firmware failure, cpufreq should not panic host kernel with BUG_ON(). Less severe pr_warn() will suffice. Add firmware_has_feature(FW_FEATURE_OPALv3) check to skip probing for device-tree on non-powernv platforms. Signed-off-by: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com> Acked-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com> CC: <stable@vger.kernel.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-07-30MIPS: Loongson: Modify ChipConfig register definitionHuacai Chen1-3/+3
This patch is prepared for Multi-chip interconnection. Since each chip has a ChipConfig register, LOONGSON_CHIPCFG should be an array. Signed-off-by: Huacai Chen <chenhc@lemote.com> Cc: John Crispin <john@phrozen.org> Cc: Steven J. Hill <Steven.Hill@imgtec.com> Cc: Aurelien Jarno <aurelien@aurel32.net> Cc: linux-mips@linux-mips.org Cc: Fuxin Zhang <zhangfx@lemote.com> Cc: Zhangjin Wu <wuzhangjin@gmail.com> Patchwork: https://patchwork.linux-mips.org/patch/7185/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-07-26Merge tag 's5pv210-dt' of ↵Arnd Bergmann5-18/+122
git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into next/soc Merge "Samsung S5PV210 DT support for v3.17" from Kukjin Kim: - support common clock framework for s5pv210 clock - add generic PHY driver on s5pv210 to support it via DT - add dt support for s5pv210-goni, smdkc110, smdkv210 and torbreck boards - remove board files from mach-s5pv210 and unused codes - enable multiplatform for s5pv210 * tag 's5pv210-dt' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung: clk: samsung: s5pv210: Remove legacy board support ARM: SAMSUNG: Remove remaining legacy code gpio: samsung: Remove legacy support of S5PV210 ARM: S5PV210: Enable multi-platform build support cpufreq: s5pv210: Make the driver multiplatform aware ARM: S5PV210: Register cpufreq platform device ARM: S5PV210: move debug-macro.S into the common space ARM: S5PV210: Untie PM support from legacy code ARM: S5PV210: Remove support for board files ARM: dts: Add Device tree for s5pc110/s5pv210 boards ARM: dts: Add Device tree for s5pv210 SoC ARM: S5PV210: Add board file for boot using Device Tree phy: Add support for S5PV210 to the Exynos USB 2.0 PHY driver clk: samsung: Add S5PV210 Audio Subsystem clock driver ARM: SAMSUNG: Remove legacy clock code serial: samsung: Remove support for legacy clock code cpufreq: s3c24xx: Remove some dead code ARM: S5PV210: Migrate clock handling to Common Clock Framework clk: samsung: Add clock driver for S5PV210 and compatible SoCs Signed-off-by: Arnd Bergmann <arnd@arndb.de>