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authorAlexandre Belloni <alexandre.belloni@bootlin.com>2019-10-07 16:47:15 +0300
committerAlexandre Belloni <alexandre.belloni@bootlin.com>2019-10-07 16:49:22 +0300
commitf00eaa38eb0c7185ffff51c5288d00af9032e354 (patch)
treec5a97924a34163ad2db90799f4d3f210f8bcd763 /include/linux/rtc.h
parentcd7629b27bf9a32f2f4020f9028216ebbd88725e (diff)
downloadlinux-f00eaa38eb0c7185ffff51c5288d00af9032e354.tar.xz
rtc: add a timestamp for year 0
A few RTCs handle dates from year 0 to year 9999. Add a timestamp even if years before 1970 will probably never be used. Link: https://lore.kernel.org/r/20191007134724.15505-1-alexandre.belloni@bootlin.com Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Diffstat (limited to 'include/linux/rtc.h')
-rw-r--r--include/linux/rtc.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/rtc.h b/include/linux/rtc.h
index df666cf29ef1..2680f9b2b119 100644
--- a/include/linux/rtc.h
+++ b/include/linux/rtc.h
@@ -160,6 +160,7 @@ struct rtc_device {
#define to_rtc_device(d) container_of(d, struct rtc_device, dev)
/* 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_BEGIN_2000 946684800LL /* 2000-01-01 00:00:00 */
#define RTC_TIMESTAMP_END_2063 2966371199LL /* 2063-12-31 23:59:59 */