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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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C
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#include <linux/types.h>#include <linux/interrupt.h>#include <linux/nvmem-provider.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);}
#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 const 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 */struct rtc_class_ops { 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 (*alarm_irq_enable)(struct device *, unsigned int enabled); int (*read_offset)(struct device *, long *offset); int (*set_offset)(struct device *, long offset); int (*param_get)(struct device *, struct rtc_param *param); int (*param_set)(struct device *, struct rtc_param *param);};
struct rtc_device;
struct rtc_timer { struct timerqueue_node node; ktime_t period; void (*func)(struct rtc_device *rtc); struct rtc_device *rtc; int enabled;};
/* flags */#define RTC_DEV_BUSY 0#define RTC_NO_CDEV 1
struct rtc_device { struct device dev; struct module *owner;
int id;
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;
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;
/* * This offset specifies the update timing of the RTC. * * tsched t1 write(t2.tv_sec - 1sec)) t2 RTC increments seconds * * The offset defines how tsched is computed so that the write to * the RTC (t2.tv_sec - 1sec) is correct versus the time required * for the transport of the write and the time which the RTC needs * to increment seconds the first time after the write (t2). * * For direct accessible RTCs tsched ~= t1 because the write time * is negligible. For RTCs behind slow busses the transport time is * significant and has to be taken into account. * * The time between the write (t1) and the first increment after * the write (t2) is RTC specific. For a MC146818 RTC it's 500ms, * for many others it's exactly 1 second. Consult the datasheet. * * The value of this offset is also used to calculate the to be * written value (t2.tv_sec - 1sec) at tsched. * * The default value for this is NSEC_PER_SEC + 10 msec default * transport time. The offset can be adjusted by drivers so the * calculation for the to be written value at tsched becomes * correct: * * newval = tsched + set_offset_nsec - NSEC_PER_SEC * and (tsched + set_offset_nsec) % NSEC_PER_SEC == 0 */ unsigned long set_offset_nsec;
unsigned long features[BITS_TO_LONGS(RTC_FEATURE_CNT)];
time64_t range_min; timeu64_t range_max; timeu64_t alarm_offset_max; time64_t start_secs; time64_t offset_secs; bool set_start_time;
#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)
#define rtc_lock(d) mutex_lock(&d->ops_lock)#define rtc_unlock(d) mutex_unlock(&d->ops_lock)
/* useful timestamps */#define RTC_TIMESTAMP_BEGIN_0000 -62167219200ULL /* 0000-01-01 00:00:00 */#define RTC_TIMESTAMP_BEGIN_1900 -2208988800LL /* 1900-01-01 00:00:00 */#define RTC_TIMESTAMP_EPOCH_GPS 315964800LL /* 1980-01-06 00:00:00 */#define RTC_TIMESTAMP_BEGIN_2000 946684800LL /* 2000-01-01 00:00:00 */#define RTC_TIMESTAMP_END_2063 2966371199LL /* 2063-12-31 23:59:59 */#define RTC_TIMESTAMP_END_2079 3471292799LL /* 2079-12-31 23:59:59 */#define RTC_TIMESTAMP_END_2099 4102444799LL /* 2099-12-31 23:59:59 */#define RTC_TIMESTAMP_END_2199 7258118399LL /* 2199-12-31 23:59:59 */#define RTC_TIMESTAMP_END_9999 253402300799LL /* 9999-12-31 23:59:59 */
extern struct rtc_device *devm_rtc_device_register(struct device *dev, const char *name, const struct rtc_class_ops *ops, struct module *owner);struct rtc_device *devm_rtc_allocate_device(struct device *dev);int __devm_rtc_register_device(struct module *owner, 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);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_read_next_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_set_state(struct rtc_device *rtc, int enabled);extern int rtc_irq_set_freq(struct rtc_device *rtc, 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(struct rtc_device *rtc);void rtc_uie_update_irq(struct rtc_device *rtc);enum hrtimer_restart rtc_pie_update_irq(struct hrtimer *timer);
void rtc_timer_init(struct rtc_timer *timer, void (*f)(struct rtc_device *r), struct rtc_device *rtc);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);}
/** * rtc_bound_alarmtime() - Return alarm time bound by rtc limit * @rtc: Pointer to rtc device structure * @requested: Requested alarm timeout * * Return: Alarm timeout bound by maximum alarm time supported by rtc. */static inline ktime_t rtc_bound_alarmtime(struct rtc_device *rtc, ktime_t requested){ if (rtc->alarm_offset_max && rtc->alarm_offset_max * MSEC_PER_SEC < ktime_to_ms(requested)) return ms_to_ktime(rtc->alarm_offset_max * MSEC_PER_SEC);
return requested;}
#define devm_rtc_register_device(device) \ __devm_rtc_register_device(THIS_MODULE, device)
#ifdef CONFIG_RTC_HCTOSYS_DEVICEextern int rtc_hctosys_ret;#else#define rtc_hctosys_ret -ENODEV#endif
#ifdef CONFIG_RTC_NVMEMint devm_rtc_nvmem_register(struct rtc_device *rtc, struct nvmem_config *nvmem_config);#elsestatic inline int devm_rtc_nvmem_register(struct rtc_device *rtc, struct nvmem_config *nvmem_config){ return 0;}#endif
#ifdef CONFIG_RTC_INTF_SYSFSint rtc_add_group(struct rtc_device *rtc, const struct attribute_group *grp);int rtc_add_groups(struct rtc_device *rtc, const struct attribute_group **grps);#elsestatic inlineint rtc_add_group(struct rtc_device *rtc, const struct attribute_group *grp){ return 0;}
static inlineint rtc_add_groups(struct rtc_device *rtc, const struct attribute_group **grps){ return 0;}#endif#endif /* _LINUX_RTC_H_ */