76cf1753f4
Implement a way for userspace to query the status of the backup battery, if supported by the hardware and driver. The RTC_VL_* bits are a somewhat recent addition (3431ca4837bf, but really only from b0efe0281234) to the uapi header, so provide our own definition if the build host's header doesn't. Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
101 lines
2.6 KiB
C
101 lines
2.6 KiB
C
#ifndef HWCLOCK_CLOCK_H
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#define HWCLOCK_CLOCK_H
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/time.h>
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#include <time.h>
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#include "c.h"
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#include "debug.h"
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#include "nls.h"
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#define HWCLOCK_DEBUG_INIT (1 << 0)
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#define HWCLOCK_DEBUG_RANDOM_SLEEP (1 << 1)
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#define HWCLOCK_DEBUG_DELTA_VS_TARGET (1 << 2)
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#define HWCLOCK_DEBUG_ALL 0xFFFF
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UL_DEBUG_DECLARE_MASK(hwclock);
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#define DBG(m, x) __UL_DBG(hwclock, HWCLOCK_DEBUG_, m, x)
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#define ON_DBG(m, x) __UL_DBG_CALL(hwclock, HWCLOCK_DEBUG_, m, x)
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struct hwclock_control {
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char *date_opt;
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char *adj_file_name;
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double rtc_delay; /* --delay <seconds> */
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#if defined(__linux__) && defined(__alpha__)
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char *epoch_option;
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#endif
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#ifdef __linux__
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char *rtc_dev_name;
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#endif
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char *param_get_option;
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char *param_set_option;
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unsigned int
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hwaudit_on:1,
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adjust:1,
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show:1,
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hctosys:1,
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utc:1,
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systohc:1,
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#if defined(__linux__) && defined(__alpha__)
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getepoch:1,
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setepoch:1,
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#endif
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noadjfile:1,
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local_opt:1,
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directisa:1,
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testing:1,
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systz:1,
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predict:1,
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get:1,
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set:1,
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update:1,
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universal:1, /* will store hw_clock_is_utc() return value */
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vl_read:1,
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vl_clear:1,
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verbose:1;
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};
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struct clock_ops {
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char *interface_name;
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int (*get_permissions) (void);
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int (*read_hardware_clock) (const struct hwclock_control *ctl, struct tm * tm);
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int (*set_hardware_clock) (const struct hwclock_control *ctl, const struct tm * tm);
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int (*synchronize_to_clock_tick) (const struct hwclock_control *ctl);
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const char *(*get_device_path) (void);
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};
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extern const struct clock_ops *probe_for_cmos_clock(void);
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extern const struct clock_ops *probe_for_rtc_clock(const struct hwclock_control *ctl);
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/* hwclock.c */
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extern double time_diff(struct timeval subtrahend, struct timeval subtractor);
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/* rtc.c */
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#if defined(__linux__) && defined(__alpha__)
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extern int get_epoch_rtc(const struct hwclock_control *ctl, unsigned long *epoch);
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extern int set_epoch_rtc(const struct hwclock_control *ctl);
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#endif
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struct hwclock_param {
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int id;
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const char *name;
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const char *help;
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};
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extern const struct hwclock_param *get_hwclock_params(void);
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extern int get_param_rtc(const struct hwclock_control *ctl,
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const char *name, uint64_t *id, uint64_t *value);
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extern int set_param_rtc(const struct hwclock_control *ctl, const char *name);
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extern int rtc_vl_read(const struct hwclock_control *ctl);
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extern int rtc_vl_clear(const struct hwclock_control *ctl);
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extern void __attribute__((__noreturn__))
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hwclock_exit(const struct hwclock_control *ctl, int status);
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extern int parse_date(struct timespec *, char const *, struct timespec const *);
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#endif /* HWCLOCK_CLOCK_H */
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