mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-05 10:29:37 +00:00
![Linus Torvalds](/assets/img/avatar_default.png)
- ARM big.LITTLE cpufreq driver from Viresh Kumar.
- exynos5440 cpufreq driver from Amit Daniel Kachhap.
- cpufreq core cleanup and code consolidation from Viresh Kumar and
Stratos Karafotis.
- cpufreq scalability improvement from Nathan Zimmer.
- AMD "frequency sensitivity feedback" powersave bias for the ondemand
cpufreq governor from Jacob Shin.
- cpuidle code consolidation and cleanups from Daniel Lezcano.
- ARM OMAP cpuidle fixes from Santosh Shilimkar and Daniel Lezcano.
- ACPICA fixes and other improvements from Bob Moore, Jung-uk Kim,
Lv Zheng, Yinghai Lu, Tang Chen, Colin Ian King, and Linn Crosetto.
- ACPI core updates related to hotplug from Toshi Kani, Paul Bolle,
Yasuaki Ishimatsu, and Rafael J. Wysocki.
- Intel Lynxpoint LPSS (Low-Power Subsystem) support improvements
from Rafael J. Wysocki and Andy Shevchenko.
/
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Merge tag 'pm+acpi-3.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management and ACPI updates from Rafael J Wysocki:
- ARM big.LITTLE cpufreq driver from Viresh Kumar.
- exynos5440 cpufreq driver from Amit Daniel Kachhap.
- cpufreq core cleanup and code consolidation from Viresh Kumar and
Stratos Karafotis.
- cpufreq scalability improvement from Nathan Zimmer.
- AMD "frequency sensitivity feedback" powersave bias for the ondemand
cpufreq governor from Jacob Shin.
- cpuidle code consolidation and cleanups from Daniel Lezcano.
- ARM OMAP cpuidle fixes from Santosh Shilimkar and Daniel Lezcano.
- ACPICA fixes and other improvements from Bob Moore, Jung-uk Kim, Lv
Zheng, Yinghai Lu, Tang Chen, Colin Ian King, and Linn Crosetto.
- ACPI core updates related to hotplug from Toshi Kani, Paul Bolle,
Yasuaki Ishimatsu, and Rafael J Wysocki.
- Intel Lynxpoint LPSS (Low-Power Subsystem) support improvements from
Rafael J Wysocki and Andy Shevchenko.
* tag 'pm+acpi-3.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (192 commits)
cpufreq: Revert incorrect commit 5800043
cpufreq: MAINTAINERS: Add co-maintainer
cpuidle: add maintainer entry
ACPI / thermal: do not always return THERMAL_TREND_RAISING for active trip points
ARM: s3c64xx: cpuidle: use init/exit common routine
cpufreq: pxa2xx: initialize variables
ACPI: video: correct acpi_video_bus_add error processing
SH: cpuidle: use init/exit common routine
ARM: S5pv210: compiling issue, ARM_S5PV210_CPUFREQ needs CONFIG_CPU_FREQ_TABLE=y
ACPI: Fix wrong parameter passed to memblock_reserve
cpuidle: fix comment format
pnp: use %*phC to dump small buffers
isapnp: remove debug leftovers
ARM: imx: cpuidle: use init/exit common routine
ARM: davinci: cpuidle: use init/exit common routine
ARM: kirkwood: cpuidle: use init/exit common routine
ARM: calxeda: cpuidle: use init/exit common routine
ARM: tegra: cpuidle: use init/exit common routine for tegra3
ARM: tegra: cpuidle: use init/exit common routine for tegra2
ARM: OMAP4: cpuidle: use init/exit common routine
...
200 lines
6.1 KiB
C
200 lines
6.1 KiB
C
/* linux/include/linux/clockchips.h
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*
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* This file contains the structure definitions for clockchips.
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*
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* If you are not a clockchip, or the time of day code, you should
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* not be including this file!
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*/
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#ifndef _LINUX_CLOCKCHIPS_H
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#define _LINUX_CLOCKCHIPS_H
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/* Clock event notification values */
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enum clock_event_nofitiers {
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CLOCK_EVT_NOTIFY_ADD,
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CLOCK_EVT_NOTIFY_BROADCAST_ON,
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CLOCK_EVT_NOTIFY_BROADCAST_OFF,
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CLOCK_EVT_NOTIFY_BROADCAST_FORCE,
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CLOCK_EVT_NOTIFY_BROADCAST_ENTER,
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CLOCK_EVT_NOTIFY_BROADCAST_EXIT,
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CLOCK_EVT_NOTIFY_SUSPEND,
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CLOCK_EVT_NOTIFY_RESUME,
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CLOCK_EVT_NOTIFY_CPU_DYING,
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CLOCK_EVT_NOTIFY_CPU_DEAD,
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};
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#ifdef CONFIG_GENERIC_CLOCKEVENTS_BUILD
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#include <linux/clocksource.h>
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#include <linux/cpumask.h>
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#include <linux/ktime.h>
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#include <linux/notifier.h>
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struct clock_event_device;
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/* Clock event mode commands */
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enum clock_event_mode {
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CLOCK_EVT_MODE_UNUSED = 0,
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CLOCK_EVT_MODE_SHUTDOWN,
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CLOCK_EVT_MODE_PERIODIC,
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CLOCK_EVT_MODE_ONESHOT,
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CLOCK_EVT_MODE_RESUME,
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};
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/*
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* Clock event features
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*/
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#define CLOCK_EVT_FEAT_PERIODIC 0x000001
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#define CLOCK_EVT_FEAT_ONESHOT 0x000002
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#define CLOCK_EVT_FEAT_KTIME 0x000004
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/*
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* x86(64) specific misfeatures:
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*
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* - Clockevent source stops in C3 State and needs broadcast support.
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* - Local APIC timer is used as a dummy device.
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*/
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#define CLOCK_EVT_FEAT_C3STOP 0x000008
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#define CLOCK_EVT_FEAT_DUMMY 0x000010
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/*
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* Core shall set the interrupt affinity dynamically in broadcast mode
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*/
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#define CLOCK_EVT_FEAT_DYNIRQ 0x000020
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/**
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* struct clock_event_device - clock event device descriptor
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* @event_handler: Assigned by the framework to be called by the low
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* level handler of the event source
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* @set_next_event: set next event function using a clocksource delta
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* @set_next_ktime: set next event function using a direct ktime value
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* @next_event: local storage for the next event in oneshot mode
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* @max_delta_ns: maximum delta value in ns
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* @min_delta_ns: minimum delta value in ns
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* @mult: nanosecond to cycles multiplier
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* @shift: nanoseconds to cycles divisor (power of two)
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* @mode: operating mode assigned by the management code
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* @features: features
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* @retries: number of forced programming retries
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* @set_mode: set mode function
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* @broadcast: function to broadcast events
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* @min_delta_ticks: minimum delta value in ticks stored for reconfiguration
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* @max_delta_ticks: maximum delta value in ticks stored for reconfiguration
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* @name: ptr to clock event name
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* @rating: variable to rate clock event devices
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* @irq: IRQ number (only for non CPU local devices)
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* @cpumask: cpumask to indicate for which CPUs this device works
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* @list: list head for the management code
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*/
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struct clock_event_device {
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void (*event_handler)(struct clock_event_device *);
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int (*set_next_event)(unsigned long evt,
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struct clock_event_device *);
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int (*set_next_ktime)(ktime_t expires,
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struct clock_event_device *);
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ktime_t next_event;
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u64 max_delta_ns;
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u64 min_delta_ns;
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u32 mult;
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u32 shift;
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enum clock_event_mode mode;
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unsigned int features;
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unsigned long retries;
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void (*broadcast)(const struct cpumask *mask);
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void (*set_mode)(enum clock_event_mode mode,
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struct clock_event_device *);
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void (*suspend)(struct clock_event_device *);
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void (*resume)(struct clock_event_device *);
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unsigned long min_delta_ticks;
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unsigned long max_delta_ticks;
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const char *name;
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int rating;
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int irq;
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const struct cpumask *cpumask;
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struct list_head list;
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} ____cacheline_aligned;
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/*
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* Calculate a multiplication factor for scaled math, which is used to convert
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* nanoseconds based values to clock ticks:
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*
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* clock_ticks = (nanoseconds * factor) >> shift.
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*
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* div_sc is the rearranged equation to calculate a factor from a given clock
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* ticks / nanoseconds ratio:
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*
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* factor = (clock_ticks << shift) / nanoseconds
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*/
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static inline unsigned long div_sc(unsigned long ticks, unsigned long nsec,
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int shift)
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{
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uint64_t tmp = ((uint64_t)ticks) << shift;
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do_div(tmp, nsec);
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return (unsigned long) tmp;
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}
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/* Clock event layer functions */
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extern u64 clockevent_delta2ns(unsigned long latch,
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struct clock_event_device *evt);
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extern void clockevents_register_device(struct clock_event_device *dev);
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extern void clockevents_config(struct clock_event_device *dev, u32 freq);
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extern void clockevents_config_and_register(struct clock_event_device *dev,
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u32 freq, unsigned long min_delta,
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unsigned long max_delta);
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extern int clockevents_update_freq(struct clock_event_device *ce, u32 freq);
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extern void clockevents_exchange_device(struct clock_event_device *old,
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struct clock_event_device *new);
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extern void clockevents_set_mode(struct clock_event_device *dev,
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enum clock_event_mode mode);
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extern int clockevents_register_notifier(struct notifier_block *nb);
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extern int clockevents_program_event(struct clock_event_device *dev,
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ktime_t expires, bool force);
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extern void clockevents_handle_noop(struct clock_event_device *dev);
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static inline void
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clockevents_calc_mult_shift(struct clock_event_device *ce, u32 freq, u32 minsec)
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{
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return clocks_calc_mult_shift(&ce->mult, &ce->shift, NSEC_PER_SEC,
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freq, minsec);
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}
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extern void clockevents_suspend(void);
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extern void clockevents_resume(void);
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#ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
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#ifdef CONFIG_ARCH_HAS_TICK_BROADCAST
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extern void tick_broadcast(const struct cpumask *mask);
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#else
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#define tick_broadcast NULL
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#endif
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extern int tick_receive_broadcast(void);
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#endif
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#if defined(CONFIG_GENERIC_CLOCKEVENTS_BROADCAST) && defined(CONFIG_TICK_ONESHOT)
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extern int tick_check_broadcast_expired(void);
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#else
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static inline int tick_check_broadcast_expired(void) { return 0; }
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#endif
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#ifdef CONFIG_GENERIC_CLOCKEVENTS
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extern void clockevents_notify(unsigned long reason, void *arg);
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#else
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static inline void clockevents_notify(unsigned long reason, void *arg) {}
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#endif
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#else /* CONFIG_GENERIC_CLOCKEVENTS_BUILD */
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static inline void clockevents_suspend(void) {}
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static inline void clockevents_resume(void) {}
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static inline void clockevents_notify(unsigned long reason, void *arg) {}
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static inline int tick_check_broadcast_expired(void) { return 0; }
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#endif
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#endif
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