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rtc: Add RTC range

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Add a way for drivers to inform the core of the supported date/time range.
The core can then check whether the date/time or alarm is in the range
before calling ->set_time, ->set_mmss or ->set_alarm. It returns -ERANGE
when the time is out of range.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Alexandre Belloni 2018-02-17 14:58:40 +01:00
parent 236b718703
commit 71db049e73
4 changed files with 37 additions and 0 deletions
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3
include/linux/rtc.h
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@ -150,6 +150,9 @@ struct rtc_device {
bool nvram_old_abi;
struct bin_attribute *nvram;
time64_t range_min;
timeu64_t range_max;
#ifdef CONFIG_RTC_INTF_DEV_UIE_EMUL
struct work_struct uie_task;
struct timer_list uie_timer;