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path: root/drivers/cpufreq/exynos-cpufreq.c
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2013-06-24cpufreq: exynos: call CPUFREQ_POSTCHANGE notfier in error casesViresh Kumar1-2/+8
PRECHANGE and POSTCHANGE notifiers must be called in groups, i.e either both should be called or both shouldn't be. In case we have started PRECHANGE notifier and found an error, we must call POSTCHANGE notifier with freqs.new = freqs.old to guarantee that sequence of calling notifiers is complete. This patch fixes it. Cc: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2013-04-10cpufreq: exynos: Remove error return even if no soc is foundAmit Daniel Kachhap1-1/+1
This patch helps to have single binary for exynos5440 and previous exynos soc's. This change is needed for adding exynos5440 cpufreq driver which does not uses exynos-cpufreq common file and adds it own driver. Signed-off-by: Amit Daniel Kachhap <amit.daniel@samsung.com> Acked-by: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-04-02cpufreq: Notify all policy->cpus in cpufreq_notify_transition()Viresh Kumar1-5/+2
policy->cpus contains all online cpus that have single shared clock line. And their frequencies are always updated together. Many SMP system's cpufreq drivers take care of this in individual drivers but the best place for this code is in cpufreq core. This patch modifies cpufreq_notify_transition() to notify frequency change for all cpus in policy->cpus and hence updates all users of this API. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Acked-by: Stephen Warren <swarren@nvidia.com> Tested-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-02-22Merge tag 'cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-socLinus Torvalds1-2/+2
Pull ARM SoC cleanups from Arnd Bergmann: "A large number of cleanups, all over the platforms. This is dominated largely by the Samsung platforms (s3c, s5p, exynos) and a few of the others moving code out of arch/arm into more appropriate subsystems. The clocksource and irqchip drivers are now abstracted to the point where platforms that are already cleaned up do not need to even specify the driver they use, it can all get configured from the device tree as we do for normal device drivers. The clocksource changes basically touch every single platform in the process. We further clean up the use of platform specific header files here, with the goal of turning more of the platforms over to being "multiplatform" enabled, which implies that they cannot expose their headers to architecture independent code any more. It is expected that no functional changes are part of the cleanup. The overall reduction in total code lines is mostly the result of removing broken and obsolete code." * tag 'cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (133 commits) ARM: mvebu: correct gated clock documentation ARM: kirkwood: add missing include for nsa310 ARM: exynos: move exynos4210-combiner to drivers/irqchip mfd: db8500-prcmu: update resource passing drivers/db8500-cpufreq: delete dangling include ARM: at91: remove NEOCORE 926 board sunxi: Cleanup the reset code and add meaningful registers defines ARM: S3C24XX: header mach/regs-mem.h local ARM: S3C24XX: header mach/regs-power.h local ARM: S3C24XX: header mach/regs-s3c2412-mem.h local ARM: S3C24XX: Remove plat-s3c24xx directory in arch/arm/ ARM: S3C24XX: transform s3c2443 subirqs into new structure ARM: S3C24XX: modify s3c2443 irq init to initialize all irqs ARM: S3C24XX: move s3c2443 irq code to irq.c ARM: S3C24XX: transform s3c2416 irqs into new structure ARM: S3C24XX: modify s3c2416 irq init to initialize all irqs ARM: S3C24XX: move s3c2416 irq init to common irq code ARM: S3C24XX: Modify s3c_irq_wake to use the hwirq property ARM: S3C24XX: Move irq syscore-ops to irq-pm clocksource: always define CLOCKSOURCE_OF_DECLARE ...
2013-02-15Merge branch 'next/cpufreq-exynos' of ↵Rafael J. Wysocki1-68/+106
git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung * 'next/cpufreq-exynos' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung: cpufreq: exynos: Fix hang in pm handler due to frequency mismatch cpufreq: exynos: Initialize return variable cpufreq: exynos: Fix unsigned variable being checked for negative value cpufreq: exynos: Get booting freq value in exynos_cpufreq_init cpufreq: exynos: Show list of available frequencies cpufreq: exynos: Add missing static cpufreq: exynos: Split exynos_target function into two functions cpufreq: exynos: Use APLL_FREQ macro for cpu divider value cpufreq: exynos: Check old & new frequency early cpufreq: exynos: Remove unused variable & IS_ERR
2013-02-09cpufreq: exynos: simplify .init() for setting policy->cpusViresh Kumar1-13/+1
With the recent changes in cpufreq core, we just need to set mask of all possible cpus into policy->cpus. Rest would be done by core. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-02-05cpufreq: exynos: Fix hang in pm handler due to frequency mismatchJonghwan Choi1-3/+5
When pm handler set freq & voltage, frequency mismatch occurred. Because freqs.new isn't set in pm handler. Signed-off-by: Jonghwan Choi <jhbird.choi@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2013-02-01cpufreq: exynos: Initialize return variableSachin Kamat1-1/+1
'ret' is undefined when the function returns from the first 'if' condition. Without this patch we get the following warning: drivers/cpufreq/exynos-cpufreq.c: In function 'exynos_target': drivers/cpufreq/exynos-cpufreq.c:182:2: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] Suggested-by: Jonghwan Choi <jhbird.choi@samsung.com> Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2013-01-25cpufreq: exynos: Fix unsigned variable being checked for negative valueSachin Kamat1-1/+1
exynos_cpufreq_scale function returns signed value which was assigned to an unsigned variable and checked for negative value which is always false. Hence make it signed. Fixes the following smatch warnings: drivers/cpufreq/exynos-cpufreq.c:83 exynos_cpufreq_scale() warn: unsigned 'old_index' is never less than zero. drivers/cpufreq/exynos-cpufreq.c:89 exynos_cpufreq_scale() warn: unsigned 'index' is never less than zero. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2013-01-18cpufreq: exynos: Get booting freq value in exynos_cpufreq_initJonghwan Choi1-2/+2
Boot_freq is for saving booting freq. But exynos_cpufreq_cpu_init is called in hotplug. If boot_freq is existed in exynos_cpufreq_cpu_init, boot_freq could be changed. Signed-off-by: Jonghwan Choi <jhbird.choi@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2013-01-18cpufreq: exynos: Show list of available frequenciesInderpal Singh1-0/+13
Add freq_attr attribute to show 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: Inderpal Singh <inderpal.singh@linaro.org> Reviewed-by: Amit Daniel Kachhap<amit.daniel@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2013-01-10cpufreq: exynos: cleanup exynos-cpufreq headerKukjin Kim1-2/+2
Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2012-12-24cpufreq: exynos: Split exynos_target function into two functionsJonghwan Choi1-65/+86
Split exynos_target function into exynos_target & exynos_cpufreq_scale. The exynos_cpufreq_scale changes the voltage & frequency. Signed-off-by: Jonghwan Choi <jhbird.choi@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2012-12-24cpufreq: exynos: Check old & new frequency earlyJonghwan Choi1-2/+5
If old & new freq have the same frequency, no need to call cpufreq notifier & regulator function. Signed-off-by: Jonghwan Choi <jhbird.choi@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2012-12-24cpufreq: exynos: Remove unused variable & IS_ERRJonghwan Choi1-2/+1
The variable 'max_support_idx, min_support_idx, pm_lock_idx" are never used, so remove the unused variable. Signed-off-by: Jonghwan Choi <jhbird.choi@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2012-11-22cpufreq: exynos: Use static for functions used in only this fileTushar Behera1-2/+2
Fixes following sparse error. drivers/cpufreq/exynos-cpufreq.c:34:5: warning: symbol 'exynos_verify_speed' was not declared. Should it be static? drivers/cpufreq/exynos-cpufreq.c:40:14: warning: symbol 'exynos_getspeed' was not declared. Should it be static? Signed-off-by: Tushar Behera <tushar.behera@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2012-11-22cpufreq: exynos: Broadcast frequency change notifications for all coresTomasz Figa1-2/+5
On Exynos SoCs all cores share the same frequency setting, so changing frequency of one core will affect rest of cores. This patch modifies the exynos-cpufreq driver to inform cpufreq core about this behavior and broadcast frequency change notifications for all cores. Signed-off-by: Tomasz Figa <t.figa@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2012-07-20EXYNOS: bugfix on retrieving old_index from freqs.oldJonghwa Lee1-2/+12
The policy might have been changed since last call of target(). Thus, using cpufreq_frequency_table_target(), which depends on policy to find the corresponding index from a frequency, may return inconsistent index for freqs.old. Thus, old_index should be calculated not based on the current policy. We have been observing such issue when scaling_min/max_freq were updated and sometimes cuased system lockups deu to incorrectly configured voltages. Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
2012-03-14EXYNOS5250: Add support cpufreq for EXYNOS5250Jaecheol Lee1-0/+2
This patch adds support cpufreq for EXYNOS5250 SoC. Basically, the exynos-cpufreq.c is used commonly and exynos5250-cpufreq.c is used for EXYNOS5250(two Cortex-A15 cores) SoC. Signed-off-by: Jaecheol Lee <jc.lee@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by: Dave Jones <davej@redhat.com>
2012-03-14EXYNOS4X12: Add support cpufreq for EXYNOS4X12Jaecheol Lee1-0/+2
This patch adds support cpufreq for EXYNOS4X12 SoCs. Basically, the exynos-cpufreq.c is used commonly and exynos4x12-cpufreq.c is used for EXYNOS4212(two Cortex-A9 cores) and EXYNOS4412(four Cortex-A9 cores) SoCs. Signed-off-by: Jaecheol Lee <jc.lee@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by: Dave Jones <davej@redhat.com>
2012-03-01[CPUFREQ] EXYNOS: Initialize locking_frequency with initial frequencyTushar Behera1-0/+2
As per definition, locking_frequency is the initial frequency which is set by boot-loader. Hence the value is updated with the initial value during boot time init call. This code was present in exynos210-cpufreq.c before this consolidation patch. - a125a17fa61a ([CPUFREQ] EXYNOS: Make EXYNOS common cpufreq driver). Signed-off-by: Tushar Behera <tushar.behera@linaro.org> Signed-off-by: Inderpal Singh <inderpal.singh@linaro.org> Signed-off-by: Dave Jones <davej@redhat.com>
2012-01-09[CPUFREQ] EXYNOS: Removed useless headers and codesJaecheol Lee1-7/+1
This patch removes no referencing header files and cleaned up useless code. Signed-off-by: Jaecheol Lee <jc.lee@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by: Dave Jones <davej@redhat.com>
2012-01-09[CPUFREQ] EXYNOS: Make EXYNOS common cpufreq driverJaecheol Lee1-0/+296
To support various EXYNOS series SoCs commonly, added exynos common structure. exynos-cpufreq.c => EXYNOS series common cpufreq driver exynos4210-cpufreq.c => EXYNOS4210 support cpufreq driver Signed-off-by: Jaecheol Lee <jc.lee@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by: Dave Jones <davej@redhat.com>
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