From: Guenter Roeck Date: Thu, 17 Aug 2023 22:55:36 +0000 (-0700) Subject: rtc: ds1305: Report maximum alarm limit to rtc core X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=46b79ac0b463e155b098805ff66f1f22ff249b45;p=linux.git rtc: ds1305: Report maximum alarm limit to rtc core DS1305 only supports alarms up to 24 hours in the future. Report the limit to the RTC core, and use the reported limit to validate the requested alarm time when setting it. If the alarm is too large when trying to set an alarm, return -ERANGE instead of -EDOM to align with error codes returned by other rtc drivers. Cc: Brian Norris Signed-off-by: Guenter Roeck Link: https://lore.kernel.org/r/20230817225537.4053865-7-linux@roeck-us.net Signed-off-by: Alexandre Belloni --- diff --git a/drivers/rtc/rtc-ds1305.c b/drivers/rtc/rtc-ds1305.c index ed9360486953e..d4de401548b42 100644 --- a/drivers/rtc/rtc-ds1305.c +++ b/drivers/rtc/rtc-ds1305.c @@ -336,8 +336,8 @@ static int ds1305_set_alarm(struct device *dev, struct rtc_wkalrm *alm) /* make sure alarm fires within the next 24 hours */ if (later <= now) return -EINVAL; - if ((later - now) > 24 * 60 * 60) - return -EDOM; + if ((later - now) > ds1305->rtc->alarm_offset_max) + return -ERANGE; /* disable alarm if needed */ if (ds1305->ctrl[0] & DS1305_AEI0) { @@ -691,6 +691,7 @@ static int ds1305_probe(struct spi_device *spi) ds1305->rtc->ops = &ds1305_ops; ds1305->rtc->range_min = RTC_TIMESTAMP_BEGIN_2000; ds1305->rtc->range_max = RTC_TIMESTAMP_END_2099; + ds1305->rtc->alarm_offset_max = 24 * 60 * 60; ds1305_nvmem_cfg.priv = ds1305; status = devm_rtc_register_device(ds1305->rtc);