diff options
| -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 67b6be2b874d..bcd0cf63eb16 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) | |||
| 66 | * rtc_time's year contains the increment over 1900, but vRTC's YEAR | 66 | * rtc_time's year contains the increment over 1900, but vRTC's YEAR |
| 67 | * register can't be programmed to value larger than 0x64, so vRTC | 67 | * register can't be programmed to value larger than 0x64, so vRTC |
| 68 | * driver chose to use 1960 (1970 is UNIX time start point) as the base, | 68 | * driver chose to use 1960 (1970 is UNIX time start point) as the base, |
| 69 | * and does the translation at read/write time | 69 | * and does the translation at read/write time. |
| 70 | * | ||
| 71 | * Why not just use 1970 as the offset? it's because using 1960 will | ||
| 72 | * make it consistent in leap year setting for both vrtc and low-level | ||
| 73 | * physical rtc devices. | ||
| 70 | */ | 74 | */ |
| 71 | static int mrst_read_time(struct device *dev, struct rtc_time *time) | 75 | static int mrst_read_time(struct device *dev, struct rtc_time *time) |
| 72 | { | 76 | { |