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authorGeert Uytterhoeven <geert+renesas@glider.be>2019-03-20 11:32:14 +0100
committerAlexandre Belloni <alexandre.belloni@bootlin.com>2019-03-20 11:37:50 +0100
commit15d82d22498784966df8e4696174a16b02cc1052 (patch)
tree5248add5b2dae5f08ea9028b380e72fb537bffa9 /drivers/rtc/rtc-sh.c
parentd6752e185c3168771787a02dc6a55f32260943cc (diff)
rtc: sh: Fix invalid alarm warning for non-enabled alarm
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>
Diffstat (limited to 'drivers/rtc/rtc-sh.c')
-rw-r--r--drivers/rtc/rtc-sh.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/rtc/rtc-sh.c b/drivers/rtc/rtc-sh.c
index d417b203cbc5..1d3de2a3d1a4 100644
--- a/drivers/rtc/rtc-sh.c
+++ b/drivers/rtc/rtc-sh.c
@@ -374,7 +374,7 @@ 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) {