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| author | Geert Uytterhoeven <geert+renesas@glider.be> | 2019-03-20 11:32:14 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-05-16 09:17:18 +0200 |
| commit | 00a9ea1b3a7dea4242a10dbf07fcbcb7d826e73d (patch) | |
| tree | 8ff6d6d247b4787a5b8ddfbc1d728eb9804c90a2 | |
| parent | 358e9483e84ac7cfa269856fa560eca307ab57dd (diff) | |
| download | linux-stable-00a9ea1b3a7dea4242a10dbf07fcbcb7d826e73d.tar.gz linux-stable-00a9ea1b3a7dea4242a10dbf07fcbcb7d826e73d.tar.bz2 linux-stable-00a9ea1b3a7dea4242a10dbf07fcbcb7d826e73d.zip | |
rtc: sh: Fix invalid alarm warning for non-enabled alarm
[ Upstream commit 15d82d22498784966df8e4696174a16b02cc1052 ]
When no alarm has been programmed on RSK-RZA1, an error message is
printed during boot:
rtc rtc0: invalid alarm value: 2019-03-14T255:255:255
sh_rtc_read_alarm_value() returns 0xff when querying a hardware alarm
field that is not enabled. __rtc_read_alarm() validates the received
alarm values, and fills in missing fields when needed.
While 0xff is handled fine for the year, month, and day fields, and
corrected as considered being out-of-range, this is not the case for the
hour, minute, and second fields, where -1 is expected for missing
fields.
Fix this by returning -1 instead, as this value is handled fine for all
fields.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/rtc/rtc-sh.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/rtc/rtc-sh.c b/drivers/rtc/rtc-sh.c index d0d2b047658b..dcd5dcae7b3c 100644 --- a/drivers/rtc/rtc-sh.c +++ b/drivers/rtc/rtc-sh.c @@ -455,7 +455,7 @@ static int sh_rtc_set_time(struct device *dev, struct rtc_time *tm) static inline int sh_rtc_read_alarm_value(struct sh_rtc *rtc, int reg_off) { unsigned int byte; - int value = 0xff; /* return 0xff for ignored values */ + int value = -1; /* return -1 for ignored values */ byte = readb(rtc->regbase + reg_off); if (byte & AR_ENB) { |