[PATCH v2 7/7] rtc: rzn1: Report maximum alarm limit to rtc core

[Guenter Roeck <linux@roeck-us.net>]

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>
---
v2: Rename range_max_offset -> alarm_offset_max
    Use the new variable to validate the limit when setting the alarm

 drivers/rtc/rtc-rzn1.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/rtc/rtc-rzn1.c b/drivers/rtc/rtc-rzn1.c
index dca736caba85..c0f448bce145 100644
--- a/drivers/rtc/rtc-rzn1.c
+++ b/drivers/rtc/rtc-rzn1.c
@@ -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);
-- 
2.39.2