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Diffstat (limited to 'drivers/rtc/rtc-mrst.c')
| -rw-r--r-- | drivers/rtc/rtc-mrst.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/rtc/rtc-mrst.c b/drivers/rtc/rtc-mrst.c index 67b6be2b874..bcd0cf63eb1 100644 --- a/drivers/rtc/rtc-mrst.c +++ b/drivers/rtc/rtc-mrst.c @@ -66,7 +66,11 @@ static inline int is_intr(u8 rtc_intr) * rtc_time's year contains the increment over 1900, but vRTC's YEAR * register can't be programmed to value larger than 0x64, so vRTC * driver chose to use 1960 (1970 is UNIX time start point) as the base, - * and does the translation at read/write time + * and does the translation at read/write time. + * + * Why not just use 1970 as the offset? it's because using 1960 will + * make it consistent in leap year setting for both vrtc and low-level + * physical rtc devices. */ static int mrst_read_time(struct device *dev, struct rtc_time *time) { |