diff options
Diffstat (limited to 'include/linux/rtc.h')
| -rw-r--r-- | include/linux/rtc.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/linux/rtc.h b/include/linux/rtc.h index 4c0bcbeb1f00..5f8e438a0312 100644 --- a/include/linux/rtc.h +++ b/include/linux/rtc.h @@ -225,6 +225,23 @@ 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) |