Commit 2b0386d5 authored by Guenter Roeck's avatar Guenter Roeck Committed by Alexandre Belloni
Browse files

rtc: rzn1: Report maximum alarm limit to rtc core 



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: default avatarGuenter Roeck <linux@roeck-us.net>
Reviewed-by: default avatarMiquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/r/20230817225537.4053865-8-linux@roeck-us.net


Signed-off-by: default avatarAlexandre Belloni <alexandre.belloni@bootlin.com>
parent 46b79ac0

drivers/rtc/rtc-rzn1.c

+2 −1
Original line number Diff line number Diff line
@@ -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);