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rtc: pcf85063: Fix reading alarm

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[ Upstream commit a6ceee26fd5ed9b5bd37322b1ca88e4548cee4a3 ]

If the alarms are disabled the topmost bit (AEN_*) is set in the alarm
registers. This is also interpreted in BCD number leading to this warning:
rtc rtc0: invalid alarm value: 2022-09-21T80:80:80

Fix this by masking alarm enabling and reserved bits.

Fixes: 05cb3a56ee ("rtc: pcf85063: add alarm support")
Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Link: https://lore.kernel.org/r/20220921074141.3903104-1-alexander.stein@ew.tq-group.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Alexander Stein 2022-09-21 09:41:41 +02:00 committed by Greg Kroah-Hartman
parent bb1bdc72dd
commit 0d96a6f5db
1 changed files with 4 additions and 4 deletions
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8
drivers/rtc/rtc-pcf85063.c
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@ -159,10 +159,10 @@ static int pcf85063_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
if (ret) if (ret)
return ret; return ret;
alrm->time.tm_sec = bcd2bin(buf[0]); alrm->time.tm_sec = bcd2bin(buf[0] & 0x7f);
alrm->time.tm_min = bcd2bin(buf[1]); alrm->time.tm_min = bcd2bin(buf[1] & 0x7f);
alrm->time.tm_hour = bcd2bin(buf[2]); alrm->time.tm_hour = bcd2bin(buf[2] & 0x3f);
alrm->time.tm_mday = bcd2bin(buf[3]); alrm->time.tm_mday = bcd2bin(buf[3] & 0x3f);
ret = regmap_read(pcf85063->regmap, PCF85063_REG_CTRL2, &val); ret = regmap_read(pcf85063->regmap, PCF85063_REG_CTRL2, &val);
if (ret) if (ret)