rtc: ls1x: add range

While the year is encoded on 32 bits in SYS_TOYWRITE1i/SYS_TOYREAD1. The
Loongson 1c datasheet states that the range is from 0 to 99.

The current code exceeds this range and seems to be working, I deduce that
the leap year algorithm will fail in 2100.

Anyway, alarm registers only encode the year on 14 bits so with alarm
support, the range will always be limited to 0 to 16383.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

diff --git a/drivers/rtc/rtc-ls1x.c b/drivers/rtc/rtc-ls1x.c
index 8aa3f223621c204c1ce4955d5542b85870ff853d..f4c248655edd6feef784c2a4eb2ea347af74272c 100644 (file)
--- a/drivers/rtc/rtc-ls1x.c
+++ b/drivers/rtc/rtc-ls1x.c
@@ -177,6 +177,8 @@ static int ls1x_rtc_probe(struct platform_device *pdev)
 
        platform_set_drvdata(pdev, rtcdev);
        rtcdev->ops = &ls1x_rtc_ops;
+       rtcdev->range_min = RTC_TIMESTAMP_BEGIN_1900;
+       rtcdev->range_max = RTC_TIMESTAMP_END_2099;
 
        return rtc_register_device(rtcdev);
 }