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rtc: isl12022: specify range_min and range_max 

The isl12022 can (only) keep track of times in the range
2000-2099. The data sheet says

  The calendar registers track date, month, year, and day of the week
  and are accurate through 2099, with automatic leap year correction.

The lower bound of 2000 is obtained by simply observing that its YR
register only counts from 00 through 99.

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Link: https://lore.kernel.org/r/20220921114624.3250848-3-linux@rasmusvillemoes.dk
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Rasmus Villemoes 2022-09-21 13:46:17 +02:00 committed by Alexandre Belloni
parent a35a2ad2b8
commit ca03b7a2c0
1 changed files with 2 additions and 0 deletions
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2
drivers/rtc/rtc-isl12022.c
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@ -251,6 +251,8 @@ static int isl12022_probe(struct i2c_client *client)
return PTR_ERR(isl12022->rtc);
isl12022->rtc->ops = &isl12022_rtc_ops;
isl12022->rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;
isl12022->rtc->range_max = RTC_TIMESTAMP_END_2099;
return devm_rtc_register_device(isl12022->rtc);
}