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rtc: introduce lock helpers 

Introduce rtc_lock and rtc_unlock to shorten the code when locking and
unlocking ops_lock from drivers.

Link: https://lore.kernel.org/r/20191019205034.6382-1-alexandre.belloni@bootlin.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
alistair/sunxi64-5.5-dsi
Alexandre Belloni 2019-10-19 22:50:34 +02:00
parent 1a064850b5
commit ae48668843
1 changed files with 3 additions and 0 deletions
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include/linux/rtc.h
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@ -159,6 +159,9 @@ struct rtc_device {
};
#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 */