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rtc: rzn1: Report maximum alarm limit to rtc core

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RZN1 only supports alarms up to one week in the future.
Report the limit to the RTC core and use the reported limit
to validate the requested alarm time when setting it.

Cc: Brian Norris <briannorris@chromium.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/r/20230817225537.4053865-8-linux@roeck-us.net
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Guenter Roeck 2023-08-17 15:55:37 -07:00 committed by Alexandre Belloni
parent 46b79ac0b4
commit 2b0386d578
1 changed files with 2 additions and 1 deletions
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3
drivers/rtc/rtc-rzn1.c
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@ -227,7 +227,7 @@ static int rzn1_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
return ret;
/* We cannot set alarms more than one week ahead */
farest = rtc_tm_to_time64(&tm_now) + (7 * 86400);
farest = rtc_tm_to_time64(&tm_now) + rtc->rtcdev->alarm_offset_max;
alarm = rtc_tm_to_time64(tm);
if (time_after(alarm, farest))
return -ERANGE;
@ -351,6 +351,7 @@ static int rzn1_rtc_probe(struct platform_device *pdev)
rtc->rtcdev->range_min = RTC_TIMESTAMP_BEGIN_2000;
rtc->rtcdev->range_max = RTC_TIMESTAMP_END_2099;
rtc->rtcdev->alarm_offset_max = 7 * 86400;
rtc->rtcdev->ops = &rzn1_rtc_ops;
set_bit(RTC_FEATURE_ALARM_RES_MINUTE, rtc->rtcdev->features);
clear_bit(RTC_FEATURE_UPDATE_INTERRUPT, rtc->rtcdev->features);