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Release 4.12 include/linux/rtc.h

Directory: include/linux
 * Generic RTC interface.
 * This version contains the part of the user interface to the Real Time Clock
 * service. It is used with both the legacy mc146818 and also  EFI
 * Struct rtc_time and first 12 ioctl by Paul Gortmaker, 1996 - separated out
 * from <linux/mc146818rtc.h> to this file for 2.4 kernels.
 * Copyright (C) 1999 Hewlett-Packard Co.
 * Copyright (C) 1999 Stephane Eranian <>
#ifndef _LINUX_RTC_H_

#define _LINUX_RTC_H_

#include <linux/types.h>
#include <linux/interrupt.h>
#include <uapi/linux/rtc.h>

extern int rtc_month_days(unsigned int month, unsigned int year);
extern int rtc_year_days(unsigned int day, unsigned int month, unsigned int year);
extern int rtc_valid_tm(struct rtc_time *tm);
extern time64_t rtc_tm_to_time64(struct rtc_time *tm);
extern void rtc_time64_to_tm(time64_t time, struct rtc_time *tm);
ktime_t rtc_tm_to_ktime(struct rtc_time tm);
struct rtc_time rtc_ktime_to_tm(ktime_t kt);

 * rtc_tm_sub - Return the difference in seconds.

static inline time64_t rtc_tm_sub(struct rtc_time *lhs, struct rtc_time *rhs) { return rtc_tm_to_time64(lhs) - rtc_tm_to_time64(rhs); }


Xunlei Pang28100.00%1100.00%

/** * Deprecated. Use rtc_time64_to_tm(). */
static inline void rtc_time_to_tm(unsigned long time, struct rtc_time *tm) { rtc_time64_to_tm(time, tm); }


Xunlei Pang23100.00%1100.00%

/** * Deprecated. Use rtc_tm_to_time64(). */
static inline int rtc_tm_to_time(struct rtc_time *tm, unsigned long *time) { *time = rtc_tm_to_time64(tm); return 0; }


Xunlei Pang28100.00%1100.00%

#include <linux/device.h> #include <linux/seq_file.h> #include <linux/cdev.h> #include <linux/poll.h> #include <linux/mutex.h> #include <linux/timerqueue.h> #include <linux/workqueue.h> extern struct class *rtc_class; /* * For these RTC methods the device parameter is the physical device * on whatever bus holds the hardware (I2C, Platform, SPI, etc), which * was passed to rtc_device_register(). Its driver_data normally holds * device state, including the rtc_device pointer for the RTC. * * Most of these methods are called with rtc_device.ops_lock held, * through the rtc_*(struct rtc_device *, ...) calls. * * The (current) exceptions are mostly filesystem hooks: * - the proc() hook for procfs * - non-ioctl() chardev hooks: open(), release(), read_callback() * * REVISIT those periodic irq calls *do* have ops_lock when they're * issued through ioctl() ... */ struct rtc_class_ops { int (*open)(struct device *); void (*release)(struct device *); int (*ioctl)(struct device *, unsigned int, unsigned long); int (*read_time)(struct device *, struct rtc_time *); int (*set_time)(struct device *, struct rtc_time *); int (*read_alarm)(struct device *, struct rtc_wkalrm *); int (*set_alarm)(struct device *, struct rtc_wkalrm *); int (*proc)(struct device *, struct seq_file *); int (*set_mmss64)(struct device *, time64_t secs); int (*set_mmss)(struct device *, unsigned long secs); int (*read_callback)(struct device *, int data); int (*alarm_irq_enable)(struct device *, unsigned int enabled); int (*read_offset)(struct device *, long *offset); int (*set_offset)(struct device *, long offset); }; #define RTC_DEVICE_NAME_SIZE 20 typedef struct rtc_task { void (*func)(void *private_data); void *private_data; } rtc_task_t; struct rtc_timer { struct rtc_task task; struct timerqueue_node node; ktime_t period; int enabled; }; /* flags */ #define RTC_DEV_BUSY 0 struct rtc_device { struct device dev; struct module *owner; int id; char name[RTC_DEVICE_NAME_SIZE]; const struct rtc_class_ops *ops; struct mutex ops_lock; struct cdev char_dev; unsigned long flags; unsigned long irq_data; spinlock_t irq_lock; wait_queue_head_t irq_queue; struct fasync_struct *async_queue; struct rtc_task *irq_task; spinlock_t irq_task_lock; int irq_freq; int max_user_freq; struct timerqueue_head timerqueue; struct rtc_timer aie_timer; struct rtc_timer uie_rtctimer; struct hrtimer pie_timer; /* sub second exp, so needs hrtimer */ int pie_enabled; struct work_struct irqwork; /* Some hardware can't support UIE mode */ int uie_unsupported; #ifdef CONFIG_RTC_INTF_DEV_UIE_EMUL struct work_struct uie_task; struct timer_list uie_timer; /* Those fields are protected by rtc->irq_lock */ unsigned int oldsecs; unsigned int uie_irq_active:1; unsigned int stop_uie_polling:1; unsigned int uie_task_active:1; unsigned int uie_timer_active:1; #endif }; #define to_rtc_device(d) container_of(d, struct rtc_device, dev) extern struct rtc_device *rtc_device_register(const char *name, struct device *dev, const struct rtc_class_ops *ops, struct module *owner); extern struct rtc_device *devm_rtc_device_register(struct device *dev, const char *name, const struct rtc_class_ops *ops, struct module *owner); extern void rtc_device_unregister(struct rtc_device *rtc); extern void devm_rtc_device_unregister(struct device *dev, struct rtc_device *rtc); extern int rtc_read_time(struct rtc_device *rtc, struct rtc_time *tm); extern int rtc_set_time(struct rtc_device *rtc, struct rtc_time *tm); extern int rtc_set_ntp_time(struct timespec64 now); int __rtc_read_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm); extern int rtc_read_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alrm); extern int rtc_set_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alrm); extern int rtc_initialize_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alrm); extern void rtc_update_irq(struct rtc_device *rtc, unsigned long num, unsigned long events); extern struct rtc_device *rtc_class_open(const char *name); extern void rtc_class_close(struct rtc_device *rtc); extern int rtc_irq_register(struct rtc_device *rtc, struct rtc_task *task); extern void rtc_irq_unregister(struct rtc_device *rtc, struct rtc_task *task); extern int rtc_irq_set_state(struct rtc_device *rtc, struct rtc_task *task, int enabled); extern int rtc_irq_set_freq(struct rtc_device *rtc, struct rtc_task *task, int freq); extern int rtc_update_irq_enable(struct rtc_device *rtc, unsigned int enabled); extern int rtc_alarm_irq_enable(struct rtc_device *rtc, unsigned int enabled); extern int rtc_dev_update_irq_enable_emul(struct rtc_device *rtc, unsigned int enabled); void rtc_handle_legacy_irq(struct rtc_device *rtc, int num, int mode); void rtc_aie_update_irq(void *private); void rtc_uie_update_irq(void *private); enum hrtimer_restart rtc_pie_update_irq(struct hrtimer *timer); int rtc_register(rtc_task_t *task); int rtc_unregister(rtc_task_t *task); int rtc_control(rtc_task_t *t, unsigned int cmd, unsigned long arg); void rtc_timer_init(struct rtc_timer *timer, void (*f)(void *p), void *data); int rtc_timer_start(struct rtc_device *rtc, struct rtc_timer *timer, ktime_t expires, ktime_t period); void rtc_timer_cancel(struct rtc_device *rtc, struct rtc_timer *timer); int rtc_read_offset(struct rtc_device *rtc, long *offset); int rtc_set_offset(struct rtc_device *rtc, long offset); void rtc_timer_do_work(struct work_struct *work);
static inline bool is_leap_year(unsigned int year) { return (!(year % 4) && (year % 100)) || !(year % 400); }


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#ifdef CONFIG_RTC_HCTOSYS_DEVICE extern int rtc_hctosys_ret; #else #define rtc_hctosys_ret -ENODEV #endif #endif /* _LINUX_RTC_H_ */

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Directory: include/linux
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