forked from Minki/linux
fd928f3e32
The stubbed version of alarmtimer_get_rtcdev() is not exported. so this won't work if this function is used in a module when CONFIG_RTC_CLASS=n. Move the stub function to the header file and make it inline so that callers don't have to worry about linking against this symbol. rtcdev isn't used outside of this ifdef so it's not required to be redefined to NULL. Drop that while touching this area. Signed-off-by: Stephen Boyd <swboyd@chromium.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/r/20200124055849.154411-4-swboyd@chromium.org
71 lines
1.9 KiB
C
71 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_ALARMTIMER_H
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#define _LINUX_ALARMTIMER_H
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#include <linux/time.h>
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#include <linux/hrtimer.h>
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#include <linux/timerqueue.h>
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struct rtc_device;
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enum alarmtimer_type {
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ALARM_REALTIME,
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ALARM_BOOTTIME,
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/* Supported types end here */
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ALARM_NUMTYPE,
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/* Used for tracing information. No usable types. */
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ALARM_REALTIME_FREEZER,
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ALARM_BOOTTIME_FREEZER,
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};
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enum alarmtimer_restart {
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ALARMTIMER_NORESTART,
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ALARMTIMER_RESTART,
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};
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#define ALARMTIMER_STATE_INACTIVE 0x00
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#define ALARMTIMER_STATE_ENQUEUED 0x01
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/**
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* struct alarm - Alarm timer structure
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* @node: timerqueue node for adding to the event list this value
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* also includes the expiration time.
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* @timer: hrtimer used to schedule events while running
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* @function: Function pointer to be executed when the timer fires.
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* @type: Alarm type (BOOTTIME/REALTIME).
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* @state: Flag that represents if the alarm is set to fire or not.
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* @data: Internal data value.
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*/
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struct alarm {
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struct timerqueue_node node;
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struct hrtimer timer;
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enum alarmtimer_restart (*function)(struct alarm *, ktime_t now);
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enum alarmtimer_type type;
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int state;
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void *data;
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};
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void alarm_init(struct alarm *alarm, enum alarmtimer_type type,
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enum alarmtimer_restart (*function)(struct alarm *, ktime_t));
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void alarm_start(struct alarm *alarm, ktime_t start);
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void alarm_start_relative(struct alarm *alarm, ktime_t start);
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void alarm_restart(struct alarm *alarm);
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int alarm_try_to_cancel(struct alarm *alarm);
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int alarm_cancel(struct alarm *alarm);
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u64 alarm_forward(struct alarm *alarm, ktime_t now, ktime_t interval);
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u64 alarm_forward_now(struct alarm *alarm, ktime_t interval);
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ktime_t alarm_expires_remaining(const struct alarm *alarm);
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#ifdef CONFIG_RTC_CLASS
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/* Provide way to access the rtc device being used by alarmtimers */
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struct rtc_device *alarmtimer_get_rtcdev(void);
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#else
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static inline struct rtc_device *alarmtimer_get_rtcdev(void) { return NULL; }
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#endif
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#endif
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